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Das Tierreich. 


Eine Zusammenstellung und Kennzeichnung der 
rezenten Tierformen. 


— a. Begründet von der Deutschen Zoologischen Gesellschaft. —__ 


Im Auftrage der 


Königl. Preuß. Akademie der Wissenschaften zu Berlin 


herausgegeben von 


Franz Eilhard Schulze. 


„Deavra der.“ „Sine systemate chaos.“ 


21. Lieferung. 


Crustacea. 
Beirat: W. Giesbrecht. 


Amphipoda 
I. Gammaridea 


by 
the Rev. T.R. R. Stebbing, M. A., F.R. S., F.L. S., F. Z.8.; 


Fellow of King’s College, London; 
formerly Fellow and Tutor of Worcester College, Oxford. 


With 127 figures. 


—— 


Berlin. ö 
Verlag von R. Friedländer und Sohn. 4 
Ausgegeben im September 1906. N 


—-- 


Das Tierreich. 


Im Auftrage der 
Königl. Preuß. Akademie der Wissenschaften zu Berlin 


herausgegeben von 
Franz Eilhard Schulze, 


21. Lieferung. 


Orustacea. Beirat: W. Giesbrecht, 


Amphipoda 
I. Gammaridea 


by 


v 


the Rev. T.R. R. Stebbing, M. A., F.R.S, F.L.S,F.ZS.: 


"Fellow of King’s College, London; 
formerly Fellow and Tutor of Worcester College, Oxford. 


With 127 figures. 


HESH 


Berlin. 


Verlag von R. Friedländer und Sohn. 
Ausgegeben im September 1906. 


Contents. 


Pag. 
A er ; V 
Abbreviations of the titles of literature. . » -»- » 22 220 20 VI 
RR Re A a EL XIX 
BE Ser Eee ER 1 
a a aan Vaio ; 5 
a: ER a EEE 717 
Alphabetical Index... .... RE EN BE 
Nomenclator generum et subgenerum . . » 2. 2: 22220 n.. 786 


Preface. 


It was originally contemplated that this volume would be published 
within the limits of the nineteenth century. When the date of issue was 
unavoidably postponed, the internal structure of the work no longer admitted 
of any extensive remodelling. In the mean time, however, it so happened 
that our knowledge of the Amphipoda was enlarged by several important 
contributions.. Accordingly the survey of the literature, which had been 
carried down with some completeness to 1898, was prematurely suffering 
from that imperfection by whieh all such surveys are eventually afflieted. 
To remedy this inconvenience so fal" »istpössible, the editor has kindly permitted 
the addition of many pages which bring the bibliography. of the subject well 
into 1905, with an occasional incursion even into the present year. 

In regard to the numerous species recorded as douktful, it is desirable 
to explain that in many instances no censure is intended of the original 
descriptions. The doubtfulness often results only from the fact that recent 
classification has adopted features of distinetion, the employment of which 
could not easily have been foreseen at an earlier period. 

The nature of the present work includes acknowledgment of indebtedness 
to innumerable authors. To the editorial staff of „Das Tierreich“ the thanks 
of readers should be united with those of contributors, if the most unremitting 
care in verifying eitations is thought worthy of gratitude. 


T. R. R, Stebbing, 
Ephraim Lodge, 
July 7, 1906, Tunbridge Wells, England. 


Abbreviations of the titles of literature. 


Abh. Schles. Ges. — Abhandlungen der Schlesischen Gesellschaft für vaterländische 
Cultur. — Abtheilung für Naturwissenschaften und Mediein. Breslau. 8. 

Acta Ac. Petrop. -— Acta Academiae Seientiarum Imperialis Petropolitanae. Petropoli. 4 

Acta Univ. Lund. — Acta Universitatis Lundensis. Lunds Universitets Ärs-Skrift. — 
Afdelningen för Mathematik och Naturvetenskap ([Tom. 26 & sequ.:] Acta 
Regiae Societatis physiographieae Lundensis. Kongl. fysiografiska Sällskapets 
i Lund Handlingar). Lund. 4. 

Act. Soc. Helvet. — Actes de la Societ& Helvetique des Sciences naturelles.. Lausanne 
(Gen?ve,...). 8. 

Agassiz, Nomenel. zool. — Nomenelator zoologicus, continens Nomina systematica Generum 
Animalium tam viventium quam fossilium. Auctore L. Agassiz. 1 Vol. & Index 
universalis. Soloduri. 1842—46, 46. 4. 

Amer. J. Sci. — The American Journal of Seience and Arts. New Haven (New York). 8. 

Amer. monthly Mag. — The American monthly Magazine and critical Review. New York. 8. 

Amer. Natural. — 'The American Naturalist. Salem (Philadelphia) (Boston). 8. 

Ann. nat. Hist. — The Annals and- Magazine of natural History, including Zoology, 
Botany, and Geology. London. 8. 

Ann. N.York Ac. — Annals of the New York Academy of Sciences, late Lyceum of 
natural History. New York. 8. 

Ann. Sei. nat. — Annales des Sciences naturelles. — [Ser. 2—4:] Zoologie ([Ser. 5 & 
sequ.:] Zoologie et Pal&ontologie). Paris. 8. 

Ann. Soe. ent. Belgique — Annales de la Soeiete entomologique de Belgique. Bruxelles. 8. 

Annuaire Mus. St.-Pötersb. — Annuaire du Musee zoologique de l’Acad&mie Imperiale 
des Sciences de St.-Petersbourg. St.-Petersbourg. 8. 

Annwario Mus. Napoli — Annuario del Museo zoologico della R. Universitä di Napoli. 
Napoli. 8. 

Ann. Univ. Lyon — Annales de l’Universit€ de Lyon. Paris. 8. 

Arb. Inst. Wien — Arbeiten aus dem zoologischen Institute der Universität Wien und 
der zoologischen Station in Triest. Wien. 8. 

Arch. Mus. Lyon — Archives du Museum d’Histoire naturelle de Lyon. Lyon. 4. 

Arch. Mus. Rio Jan. — Archivos do Museu nacional do Rio de Janeiro. Rio de 
Janeiro. 4. 

Arch. Naturg. — Archiv für Naturgeschichte. Berlin. 8. 

Arch. Naturv. Kristian. — Archiv for Mathematik og Naturvidenskab. Kristiania. 8. 

Atti Acc. Borbon. — Atti della Reale Accademia delle Seienze, Sezione della Societä 

+ Reale Borboniea. Napoli. 4. 

Atti Acc. Napoli — Soeietä Reale di Napoli. Atti della Reale Accademia delle Scienze 
fisiiche e matematiche. Napoli. 4. 

Atti Soc. Ital. — Atti della Soeietä Italiana di Scienze naturali. Milano. 8. 

Barrois, Cat. Crust. Acores — Catalogue des Crustacös marins recueillis aux’ Acores 
durant les Mois d’Aoüt et Septembre 1887. Par Th. Barrois. Lille. 1888. 8. 

” Barrois, Note Orchesties — Note sur quelques Points de la Morphologie des Orchesties 

suivie d’une Liste suceinete des Amphipodes du Boulonnais. Par Th. Barrois. 

Lille. 1887. 8. 


Ahyrskiaklons ' the titles of literature Vo 


rg Cat. Amphip. Brit. Mus. — Catalogue of the Speceimens of Amphipodous Crustacea 
in the Colleetion of the British „Museum. By C. Spence Bate. London. 
1862 [Preface dat. 1862 XII]. 8." 

Bate & Westwood, Brit. sess. Crust. — A History of the British sessile-eyed Crustacea. 
By ©. Spenee Bate and J.O. Westwood. Vol.1,2. London. 1863 (1861—63, 
68), 68 (1863, 66—68)*). 8. 

Belcher, Last Arct. Voy. — The last of the Arctic Voyages; being a Narrative of the 
Expedition in H. M. S. Assistance, under the Command of Captain Sir Edward 
Belcher, in Search of Sir John Franklin, during the Years 1852—54. 
With Notes on the natural History, by Sir John Richardson, [Richard] 
Owen, Thomas Bell, J. W. Salter, and LovellReeve, Vol.1,2. London. 
1855. 8. 

Berlin. ent. Z. — Berliner entomologische Zeitschrift. Berlin. 8. 

. Bih. Svenska Ak. — Bihang till Kongl. Svenska -Vetenskaps-Akademiens Handlingar. 
— Afdelning 4, Zoologi. Stockholm. 8. 

Bijdr. Dierk. — Bijdragen tot de Dierkunde. Uitgegeven door het |Koninklijk zoologisch 
Genootschap Natura Artis Magistra|, te Amsterdam). Amsterdam. 4. 

Biol. Centralbl. — Biologisches Centralblatt. Erlangen (Leipzig). 8. 

Boeck, Skand. Arkt. Amphip. — De Skandinaviske og Arktiske Amphipoder, beskrevne 
af Axel Boeck. Hefte 1,2. Christiania. 1872, 76. 4. 

€ Bis, Crust. — Histoire naturelle des Crustaces, contenant leur Description et leurs 

E- Moeurs. Par L.A.G.Bosc. Tom.1,2. Paris. X [1802]. 6. 

F Boston J. nat. Hist. — Boston Journal of natural History. Boston. 8. 

f Bronn’s Kl. Ordn. — Die Klassen und Ordnungen des Thier-Reichs wissenschaftlich 

PB. dargestellt in Wort und Bild. Von H.G. Bronn, fortgesetzt von A. Ger- 

| staecker. — 5. Band. Die Klassen und Ordnungen der Arthropoden wissen- 

E schaftlich dargestellt in Wort undBild. VonA.Gerstaecker. Abtheilung], II. 

2 Crustacea.” Leipzig und Heidelberg. 1866—79, 81—95. 8. 

Bull. Ace. St.- Petersb. — Bulletin de l’Acadömie Imperiale des Seiences de St.-Pöters- 
bourg. St.-Petersbourg. 4 (8). : 

Bull. Illinois Mus. — Bulletin of the Illinois State Museum of natural History. Spring- 


ie An 2, ei 


field. 4. 
Bull. Mus. Harvard — Bulletin of the. Masenm of comparative Zoology at Harvard 


Bull. Mus. Monaco —- Bulletin du Musöe oc&anographique de Monaco. Monaco. 8. 
Bull. Mus. Paris — Bulletin du Museum d’Histoire naturelle. Paris. 8. 
Bull. N. York Mus. — Bulletin of the New York State Museum. Albany. 8. 
Ei Bull. phys.-math. Ac. St.-Petersb. — Bulletin de la Classe physieo-mathenratique de 
we: l’Acad&mie Imperiale des Seiences de St.-Pötersbourg. St.-Petersbourg. 4. 
Bull. sei. France Belgique — Bulletin scientifique de la France et de la Belgique. 
Paris. 8. 
Bull. sei. Nord — Bulletin scientifique, historique et litteraire du Departement du 
E Nord et des Pays voisins (Tom. 19:] Bulletin scientifique du Nörd de la 
France et de la Belgique). Lille (Paris). 8. 
Bull. Soc. Borda — Bulletin de la Soei6t& de Borda. Dax. 8. 
Bull. Soc. ent. France — Bulletin des Söances et Bulletin bibliographique de la Sociste 
entomologique de France. Paris. 8. 
. Bull. Soc. ent. Ital. — Bullettino della Societä entomologiea Italiana. Firenze. 8. 
Bull. Soc. Etud. Paris — Bulletin de la Soci6ts d’Etudes seientifiques de Paris. Paris. 8. 


Er 
q College, in Cambridge. Cambridge, Mass., U.8. A. 8. 


Bull. Soc. Moscou — Bulletin de la Soeiöte Imp£riale des Naturalistes de Moscou. 
Moseou. 8. 

.Bull.’Soc. Nancy — Bulletin de la Societe des Seiences de Nancy. Nancy et Paris 
u: “ (Paris). 8. 


& Bull. Soc. Neuchatel — Bulletin de la Soeiete des Sciences naturelles de Neuchatel. 
Er Neuchatel. 8. 


*) Cfr.: ThomasR.R.Stebbing in: Rep. Voy. Challenger, 2.29 p.328, 340, 343, 372. 


VIII Abbreviations of the titles of literature 


Bull. Soc. philom. — Bulletin de la Soeiöt& philomathique de Paris. Paris. 4. 

Bull. Soc. Rouen — Bulletin de la SocietE des Amis des Sciences naturelles de Rouen. 
Rouen. 8. 

Bull. Soc. Vaudoise — Bulletin de la Soeiet& Vaudoise des Sciences naturelles. Lausanne. 8. 

Bull. Soc. zool. France — Bulletin de la Societe zoologique de France. Paris. 8. 

Bull. U. S. Bureau Fish. — Department of Commerce and Labor. Bulletin of the 

Bureau of Fisheries. Washington. 8. 

Bull. U. $S. Mus. — Bulletin of the United States national Museum. ya 8. 

Burmeister, Handb. Naturg. — Handbuch der Naturgeschichte.e Zum Gebrauch bei 
Vorlesungen entworfen von Hermann Burmeister. Berlin. 1837. 8. 

Carus, Prodr. F. Medit. — Prodromus Faunae Mediterraneae sive Deseriptio Animalium 
Maris Mediterranei Incolarum quam comparata Silva Rerum quatenus innotuit 
adiectis Locis et Nominibus vulgaribus eorumque Auctoribus in Commodum 
Zoologorum congessit Julius Vietor Carus. Vol. 1, 2. Stuttgart. 1885 
(1884, 85), 89—93 (1889, 90, 98). 8. 

Costa, Deser. 3 Crost. dal Hope — Achille Costa, Deawizione di tre nuovi Crostacei 
del Mediterraneo discoperti dal Rev. G. F. Hope. Estratta dal Fascicolo 83° 
della Fauna del Regno di Napoli. [Napoli.] [1853.] 4 

Costa, Fauna Reg. Napoli — Fauna del Regno di Napoli ossia Enumerazione di tutti 
gli Animali che abitano le diverse Regioni di questo Regno e le Acque che 
le bagnano ... di Oronzio-Gabriele Costa. [Continuato da Achille Costa.] — 
Crostacei ed Aracnidi. Napoli. 1836 (1836—51). 4. 

©.-R. Ac. Sei. — Comptes rendus hebdomadaires des Söances de l’Acad&mie des Sciences. 
Paris. 4. 

©.-R. Ass. Frang. — Association Francgaise pour l’Avancement des Sciences. Compte 
rendu de la... Session. Paris. 8. 

Cuvier, Rögne an., ed.3 — Le Regne animal distribu& d’apr&s son Organisation, pour 
servir de Base & l’Histoire naturelle des Animaux, et d’Introduetion ä l’ Anatomie 
comparee, par Georges Cuvier. [3.] Edition accompagnee de Planches 
gravees,... par une R&union de Disciples de Cuvier. — Les Crustae6s. 
Avec un Atlas, par [Henri] Milne Edwards. Paris. [1836—49.] 4. 

Cuvier, Rögne an., n. ed. — Le Regne animal distribu& d’apr&s son Organisation, pour 
servir de Base ä& l’Histoire naturelle des Animaux et d’Introduction a P 
Anatomie compar&e. Par [Georges] Cuvier. Nouvelle Edition, revue et 
augmentee. [Tom.4&5:] Par [Pierre Andrö] Latreille. Tom. 1—5. Paris. 
1829, 29, 30, 29, 29. 8. 

Danske Selsk. Afh. — Det Kongelige Danske Videnskabernes Selskabs naturviden- 
skabelige og mathematiske Afhandlinger. Kjöbenhavn. 4. 

Danske Selsk. Skr. — Det Kongelige Danske Videnskabernes Selskabs Skrifter. — [Raekke 
5 & sequ.:] Naturvidenskabelig og mathematisk Afdeling. Kjöbenhavn. 4. 

De Kay, Zool. N.-York — Zoology of New-York, or the New-York Fauna; eomprising 
detailed Desceriptions of all the Animals hitherto observed within the State 
of New-York, with brief Notices of those occasionally found near its Borders, 
and accompanied by appropriate Illustration. By James E. De Kay. — 
Part 6. Crustacea. Albany. 1844. 4. 

Denk. Ak. Wien — Denkschriften der Kaiserlichen Akademie der Wissenschaften. — 
Mathematisch-naturwissenschaftliche Classe. Wien. 4. 

Deser. Egypte — Description de V’Egypte, ou Reeueil des Observations et des Recherches 
qui ont &t& faites en Feypte pendant l’Expedition de l’Armöe Francaise, 
publi& par les Ordres de sa Majest& l’Empereur Napolöon le Grand. — 
Histoire naturelle.. Tom. lı—lıv, 2; Planches. Paris. 1809 [1809-27], 13 
[1818, 29]*). 4&2. 

Desmarest, Consid. gen. Crust. — Considerations generales sur la ÖOlasse des Crustac6s, 
et Description des Especes de ces Animaux, qui vivent dans la Mer, sur les 
Cötes, ou dans les Eaux douces de la France. Par Anselme-Gaetan Desmarest. 
Paris, Strasbourg. 1825. 8. 


*) Ofr.: C. Davies Sherborn in: .P. zool. Soe. London, 1897 p. 285. 


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u En 


a et a 


Abbreviations of the titles of literature IX 


Diet. Sei. nat. — Dietionnaire des Sciences naturelles, „... Par plusieurs Professeurs 
du Jardin du Roi, et des prineipales Ecoles de Paris. [Red. par F. Cuvier.] 
Tom. 1—60; Planches. Strasbourg et Paris (Paris). 1816-30. 8. 

Dijmphna Udb. — Disusbue-Topieie zoologisk-botaniske Udbytte. Udgivet..... af 
Kjebenhavns Universitets zoologiske Museum ved Chr. Fr. Lütken. Kjeben- 
havn. 1887. 8. 

Edinb. Enc. — The Edinburgh Eneyelopaedia; eondueted by David Brewster. With 
the Assistance of Gentlemen eminent in Seience and Literature. Vol. 1—18. 

Edinburgh. 1830 [1809—31]. 4. 

Enc. Brit., ed. 5 — The Encyelopaedia Britannica, a Dietionary of Arts, Seiences, 
and general Literature. Fifth Edition. Vol. 1—20; Suppl. 1--6. Edinburgh. 
1814—17; 16—24. 4. 

Enc. meth. — Eneyelopedie methodique, ou par Ordre de Matieres; par une Soeidt6 
de Gens de Lettres, de Savans et d’Artistes. — Histoire naturelle. Tom. 4—10: 
Inseetes (Entomologie). Paris, Liege (Paris). 1789, 90, 91, 92, 1811 [& 1812vu], 
19 [& 1824vu], 25 [& 1828].*) 4. 

Expl. Algerie — Exploration scientifique de l’Algerie pendant les Annees 1840, 41, 42. 
Publi6ee par Ordre du Gouvernement et avec le Coneours d’une Commission 
academique. — Sciences physiques. Zoologie. I—-IV. Histoire naturelle des 
Animaux articulös par H. Lucas. Partiel—3; Atl. Paris. 1849 [1845—49]. 4 

Exp. Mor&e — Expedition scientifique de Moree. Section des Seiences physiques. — 
Tom. 3. Partie I. Zoologie. Cum Atl. Paris. 1836 (1832, 33); 31l—35. 4&2. 

Expl. Tunisie — Exploration scientifique de la Tunisie, publi6e sous les Auspices du 
Ministere de Y’Instruction publique. —- Zoologie. Etude sur les Crustac&s 
terrestres et fluviatiles recueillis en Tunisie en 1883, 1884 et 1885 par A. 
Letourneux, M. Sedillot et Valery Mayet. Par Eugene Simon. Paris. 
1886. 8. 

Fabrieius, Ent. syst. — Joh. Christ. Fabrieii Entomologia systematica emendata et 
aucta. Secundum Classes, Ordines, Genera, Species adjectis Synonimis, Loeis, 
Observationibus, Descriptionibus. Tom. 1—4. [Cum Ind.:] Index alphabetieus 
in J.C.Fabrieii Entomologiam systematicam, emendatam et auetam, Ordines, 
Genera et Species continens. [Cum Suppl.:] Joh. Christ. Fabrieii Supple- 
mentum Entomologiae systematicae. [Cum Ind. Suppl.:] Index alphabeticus 
in J. C. Fabrieii Supplementum Entomologiae systematicae, Ordines, Genera 
et Species continens. Hafniae. 1792, 93, 93/94, 94; 96; 98; 99. 8. 

Fabricius, Fauna Groenl. — Fauna Groenlandica, systematice sistens Animalia Groen- 
landiae oceidentalis hactenus indagata, ... secundum proprias Observationes 
Öthonis Fabrieii. Hafniae et Lipsiae. 1780. 8. 

Fabricius, Gen. Ins. — Ioh. Christ. Fabrieii Genera Inseetorum eorumque Characteres 
naturales secundum Numerum, Figuram, Situm et Proportionem omnium 
Partium Oris adiecta Mantissa Speeierum nuper deteetarum. Chilonii. [1777.] 8. 


Fabricius, Reise Norweg. — Johann Christian Fabrieius Reise nach Norwegen mit 


Bemerkungen aus der Naturhistorie und Oekonomie. Hamburg. 1779. 8. 
Fabricius, Spec. Ins. — loh. Christ. Fabrieii Speeies Insectorum exhibentes eorum 
Differentias speeificas, Synonyma Auctorum, Loca natalia, Metamorphosin adiectis 
Observationibus, Deseriptionibus. ‘Tom. 1,2. Hamburgi et Kilonii. 1781. 8. 
Fabricius, Syst. Ent. — Io. Christ. Fabrieii Systema Entomologiae, sistens Inseetorum 
Classes, Ordines, Genera, Species, adieetis Synonymis, Locis, Deseriptionibus, 
Observationibus. Flensburgi et Lipsiae. 1775. 8. 

Fauna Haw. — Fauna Hawaiiensis, or the Zoology of the Sandwich (Hawaiian) Isles. 
Being Results of the Explorations instituted by the joint Committee appointed 
by the Royal Society of London for promoting natural Seience and the British 
Association for the Advancement of Seience and carried on with the Assistance 
of those Bodies and the Trustees of the Bernice Pauahi Bishop Museum at 
Honolulu. Edited by D. Sharp. Vol. 1-3. Cambridge. 1899--1904. 4. 


*) Ofr.: C. Davies Sherborn & B. B. Woodward in: P. zool. Soe. London, 


1893 p.583 & 1899 p. 595. 


x Abbreviations of the titles of literature 


Fedtschenko, Turkestan — Ilyremecrsie #5 Typrecrans yrena-ochoBarera Übmecrsa 
A. II! Dexueuko, copepmeHnnoe 0Tb Hmneparopcraro Oömecrsa Joöurerei 
Ecrecrposuania no llopyuenim Typkecranckaro T'renepars-I'y6epsaropa K. II. 
®ous-Kaydmana. [Die Reise Fedtschenko’s in Turkestan, auf Ver- 
anlassung des General-Gouverneurs K. P. v. Kauffmann herausgegeben 
von der Kaiserlichen Gesellschaft der Freunde der Naturwissenschaften zu 
Moskau.] — Tom. II. 3ooreorpabuyeckia Hacataozania. [Zoogeographische 
Untersuchungen.] Macrs III. Paroo6pasusia, Crustacea, o6padorarns. B. H. 
Yasauuue. [W. N. Uljanin.] Terpans 1. C.-Ierepöyprz, Mocksa. 1875. 
4. [& in: Izv. Obshch. Moskov., v.11 nr. 6.] 

Feuille Natural. — Feuille des jeunes Naturalistes. Paris. 8. 

F. Fl. Neapel — Fauna und Flora des Golfes, von Neapel und der angrenzenden 
Meeres-Abschnitte herausgegeben von der Zoologischen Station zu Neapel. 


— 20. Monographie. Gammarini del Golfo di Napoli. Monografia di Antonio. 


Della Valle. Con Atl. Berlin. 1893. 4. 

Forbes, Nat. Hist. Sokotra — The natural History of Sokotra and Abd-el-Kuri. Being 
the Report upon the Results of the Conjoint Expedition to these Islands 
in 1898—9, by W. R. Ogilvie-Grant, of the British Museum, and H. O. 
Forbes, of the Liverpool Museums, together with Information from other 
available Sources. Forming a Monograph of the Islands. Edited by Henry 
O0. Forbes. Liverpool, London. 1903. 8. 

Forh. Selsk. Christian. —- Forhandlinger i Videnskabs-Selskabet i Christiania. Chri- 
stiania. 8. 


Forh. Skand. Naturf. — Forhandlinger ved de Skandinaviske Naturforskeres. Göthe- 


borg (...). 8. 

Frey & Leuckart, Wirbell. Th. — Beiträge zur Kenntnis wirbelloser Thiere Pr be- 
sonderer Berücksichtigung der Fauna des Norddeutschen Meeres. Von Hleihich, 
Frey und Rudolf Leuckart. Braunschweig. 1847. 4. 

Gardiner, Fauna Mald. Laccad. — The Fauna and Geography of the Maldive and 
Laccadive Archipelagoes. Being the Account of the Work carried on and of the 
Collections made by an Expedition during the Years 1899 and 1900. Edited 
by J. Stanley Gardiner. Vol.1,2. Cambridge. 1903 (1901, 02, 03), 08—05. 4. 

Gay, Hist. Chile — Historia fisica y politica de Chile segun Documentos adquiridos ... 
y publicada bajo los Auspicios del supremo Gobierno por Claudio Gay. — 
Zoologia. Tom. 1—8; Atl. Paris. 1847--54. 8&2. 

Geer, M&m. Hist. Ins. — M&moires pour servir ä& l’Histoire des Inseetes. Par Charles 
de Geer. Tom. 1-—-7. Stockholm. 1752, 71, 73, 74, 75, 76, 78. 4. 

Gervais & Beneden, Zool. med. — Zoologie mödicale. Expos& möthodique du Regne 
animal bas& sur l’Anatomie, l’Embryogenie et la Palöontologie eomprenant 
la Description des Esp&ces employ&es en Medecine de celles qui sont veni- 
meuses et de celles qui sont Parasites de ’Homme et des Animaux par Paul 
Gervais [et] P.-J. van Beneden. Tom. 1, 2. Paris, Londres, New-York. 
1859. 8. 

Gmelin, Gen. Syst. Nat. — A general System of Nature, through the tür grand 
Kingdoms of Animals, Vegetables and Minerals. Translated from Gmelin’s 
last Edition of the celebrated Systema Naturae by Sir Charles Linne. 
Amended and enlarged by the Improvements and Discoveries of later 
Naturalists and Societies, with appropriate Copper-Plates, by William 
Turton. — Vol. 1—7. London. 1806. 8. 

Gmelin, Syst. Nat. — Caroli a Linn& Systema Naturae per Regna tria Naturae, secundum 
Classes, Ordines, Genera, Species, eum Characteribus, Differentiis, Synonymis, 
Loeis. Editio XIII, aucta, reformata. Cura Jo. Frid. Gmelin. — Tomus I. 
Pars 1—7. Lipsiae. 1788 [Pars 6 & 7: 1791]. 8. 

@osse, Man. mar. Zool. — A Manual of marine Zoology for the British Isle. By 
Philip Henry Gosse. Part 1,2. London. 1855, 56. 12. 

Gosse, Rambles Devonsh. — A Naturalist's Rambles on the Devonshire Coast. By 
Philip Henry Gosse. London. 1853. 8. 


EN 


gaben ur on Ach u en a Le ET any a ar me nina mi A lin u le az 


Abbreviations of the titles of literature XI 


Grube, Ausfl. Triest — Ein Ausflug nach Triest und dem Quarnero. Beiträge zur 
Kenntniss der Thierwelt dieses Gebietes von Adolph Eduard Grube. Berlin. 
1861. 8. 

Grube, Lussin — Die Insel Lussin und ihre Meeresfauna. Nach einem sechswöchentlichen 
Aufenthalte geschildert von Adolf Eduard Grube. Breslau. 1864. 8. 


 Guerin- Möneville, Iconogr. Reögne an. — Ieonographie du Regne animal de G. Cuvier, 


ou Representation d’apr&s Nature de l’une des Especes les plus remarquables 
et souvent non encore figurees, de chaque Genre d’Animaux, Avec un Texte 
deseriptif mis au Courant de la Science. Par F. E. Gu&rin-Möneville. 
Tom. 1—3. Paris, Londres. 1829-44. 4 (& 8). 

Hansen, Choniostom. — The Choniostomatidae. A Family of Copepoda, Parasites on 
Crustacea Malacostraca. By H.J. Hansen. Copenhagen. 1897. 4. 

Harriman Alaska Exp. — Harriman Alaska Expedition. With Cooperation of 
Washington Academy of Sciences. Alaska. — Vol. 10. Crustaceans. By 
Mary J. Rathbun, Harriet Richardson, S.J. Holmes, and Leon J. Cole. 
New York. 1904. 8. 

Haswell, Cat. Austral. Crust. — The Australian Museum Sydney. Catalogue of the 
Australian stalk- and sessile-eyed Crustacea. By William A. Haswell. Sydney- 
1882.- 8. 

Herbst, Naturg. Krabben Krebse — Versuch einer Naturgeschichte der Krabben und 
Krebse nebst einer systematischen Beschreibung ihrer verschiedenen Arten 
von Johann Friedrich Wilhelm Herbst. Band 1—3. Berlin und Stralsund. 
1790 (1782-90), 96 (1791-96), 99—1804. 4&2. 

Herdman, Rep. Ceylon Pearl Fish. — Report to the Government of Ceylon on the 
Pearl Oyster Fisheries of the Gulf of Manaar, by W.A. Herdman. With 
supplementary Reports upon the marine Biology of Ceylon, by other Naturalists. 
Published.... by the Royal Soeiety. Part 1, 2. London. 1903, 04. 4. 

Herrmannsen, Ind. Gen. Malac. — Indieis Generum Malacozoorum Primordia. Nomina 
Subgenerum, Generum, Familiarum, Tribuum, Ordinum, Classium; adjectis 
Auetoribus, Temporibus, Loeis systematicis atque literariis, Etymis, Synonymis. 
Praetermittuntur Cirripedia, Tunieata et Rhizopoda. Conseripsit A.N. Herr- 
mannsen. Vol.1,2. Cassellis. 1846, 47—49. 8. 

Hist. An. artie — Histoire naturelle des Animaux artieules, Annelides, Crustac6s, 

- Arachnides, Myriapodes et Insectes. — Histoire naturelle des Crustaces, des 
Arachnides et des Myriapodes, par [Hippolyte! Lucas. . Paris. 1840. 8. 


Hope, Cat. Crost. Ital. — Catalogo dei Crostacei Italiani e di molti altri del Mediterraneo 


per Fr. Gugl. Hope. Napoli. 1851. 8. 

Horae Soc. ent. Ross. — Horae Soeietatis entomologieae Rossicae. Petropoli. 8. 

Huxley, Man. Anat. Invert. — A Manual of the Anatomy of invertebrated Animals 
by Thomas H. Huxley. London. 1877. 8. 

J. Ac. Philad. — Journal of the Academy of natural Sciences of Philadelphia. Phila- 
delphia. 8(4). 


 Jahrb. Hamburg. Anst. — Jahrbuch der Hamburgischen wissenschaftlichen Anstalten. 


Hamburg. 8. 

Jahresber. Comm. D. Meere — Jahresbericht der Commission zur wissenschaftlichen 
Untersuehung der Deutschen Meere in Kiel. Berlin. 2. 

Jahresber. Ges. Hannover — Jahresbericht der naturhistorischen Gesellschaft zu Hannover. 
Hannover. 8. 

Jahresber. Schles. Ges. — Jahres-Bericht der Schlesisechen Gesellschaft für vaterländische 
Cultur. Breslau. 4, 8. 

J. Asiat. Soc. Bengal — Journal of the Asiatie Society of Bengal. — [Vol. 34 & sequ.:] 
Part II, Natural History ete. Caleutta. 8. 

J. Linn. Soc. — The Journal of the Linnean Society. — Zoology. London. 8. 


 Jurinac, Fauna Kroat. Karst. — Ein Beitrag zur Kenntnis der Fauna des Kroatischen 


Karstes und seiner unterirdischen Höhlen. Von Adolf E. Jurinae. Jena. 
1888. 8. 


Xu Abbreviations of the titles of literature 


Koch, ©. M. A. — C.1L. Koch, Deutschlands Crustaceen, Myriapoden und Arachniden. 
Ein Beitrag zur Deutschen Fauna. Herausgegeben von [Gottlieb August 
Wilhelm] Herrich-Schäffer. Heft 1-40. Regensburg. 1835—44. 16. 

Kossmann, Reise Roth. Meer. — Zoologische Ergebnisse einer im Auftrage der Königlichen 
Academie der Wissenschaften zu Berlin ausgeführten Reise in die Küsten- 
gebiete des Rothen Meeres. Herausgegeben mit Unterstützung ... von 
Robby Kossmann. 1. Hälfte. 2. Hälfte, I. Lieferung. Leipzig. 1877, 80. 4. 

Lamarck, Hist. An. s. Vert. — Histoire naturelle des Animaux sans Vertebres, prösentant 
les Caracteres göneraux et partieuliers de ces Animaux,...; pr&cedee d’une 
Introduetion ... Par [Jean Baptiste] de Lamarck. Tom. 15, 6ı&ım, 7. 
Paris. 18151m, 1611, 16vım, 17nı, 18vı, 19n—vı, 221v, 22vım. 8. 

Lamarck, Hist. An. s. Vert., ed. 2 — Histoire naturelle des Animaux sans I SIEDERE 
presentant les Caractäres generaux et particuliers de ces Animaux,. 
pröcödee d’une Introduetion.... Par J. B. P. A.de Lamarck. 2. Haition. 
Revue et augmentee de Notes pressntant les Faits nouveaux dont la Science 
s’est enrichie jusqu’a ce Jour; par G. P. Deshayes et H. Milne Edwards. 
Tom. 1—11l. Paris. 1835—45. 8. 

Latreille, Gen. Orust. Ins. — P. A. Latreille Genera Crustaceorum et Inseetorum 
seeundum Ordinem naturalem in Familias disposita, Iconibus Exemplisque 
plurimis explicata. Tom. 1—4. Parisiis et Argentorati. 1806, 07, 07, 09. 8. 

Latreille, Hist. Crust. Ins. — Histoire naturelle, gönörale et partieuliere, des Crustacös 
et des Inseetes. Ouvrage faisant Suite aux Oeuvres de Leclere de Buffon, 
et Partie du Cours eomplet d’Histoire naturelle redig& par C. S. Sonnini. 

Par P. A. Latreille. Tom. 1—14. Paris. X—XIII [1802—1805]. 8. 

Leach, Zool. Misc. — The zoological Miscellany; being Descriptions of new, or inter- 
esting Animals, by William Elford Leaeh. Illustrated with coloured Figures, 
drawn from Nature, by R.P. Nodder. Vol.1—3. London. 1814, 15, 17. 8. 

Linne, Fauna Svec., ed.2 — Caroli Linnaei Fauna Svecica sistens Animalia Sveciae 
Regni: Mammalia, Aves, Amphibia, Pisces, Inseeta, Vermes. Distributa per 
Ulasses & Ordines, Genera & Speeies, cum Differentiis Specierum, Synonymis 
Auetorum, Nominibus Incolarum, Locis Natalium, Deseriptionibus Inseetorum. 
Editio altera, aucetior. Stockholmiae. 1761. 8. 

Linne, Syst. Nat., ed. 10 -— Caroli Linnaei Systema Naturae per Regna tria Naturae, 
sind Classes, Ordines, Genera, Species, cum Characteribus, Differentiis, 
Synonymis, Ele Editio X, $eleriante — Tomus I. Holmiae. 1758. 8. 

Linne, Syst. Nat., ed. 12 — Caroli aLinn& Systema Naturae per Regna tria Naturae, 
secundum Classes, Ordines, -Genera, Species, cum Characteribus, Differentiis, 
Synonymis, Locis. Editio XII, reformata. — Tomus I. Pars 1,2. Holmiae. 
1766, 67. 8. 

List Brit. An. Brit. Mus. — List of the Specimens of British Animals in the Collection 
of the British Museum. — Part 4. Crustacea. [By Adam White.] London. 
1850. 12. 

Mag. nat. Hist. — The Magazine of natural History, and Journal of Zoology, Botany 
Mineralogy, Geology, and Meteorology. London. 8. 

Mag. Zool. — Magasin de Zoologie |[Ser. 2:], d’Anatomie compar&e et de Palöontologie|. 
Paris. 8. 

Mandt, Observ. Groenl. — Observationes in Historiam naturalem et Anatomiam com- 
paratam in Itinere Groenlandico faetae. Dissertatio inauguralis, quam . 
Die XXI. M. Julii A. 1822 publice defendet Auctor Martinus Guilelmus 
Mandt. [Berolini.] 1822. 8. 

Marschall, Nomenel. zool. — Nomenelator zoologiens continens Nomina systematica 
Generum Animalium tam viventium quam fossilium, seeundum Ordinem 
alphabeticum disposita. Conseriptus a Comite Augusto de Marschall. 
Vindobonae. 1873. 8. 

Mem. Acc. Napoli — Memorie della Reale Accedernie delle Seienze dal 1852 in avant. 
Napoli. 4. 

Mem. Acc. Verona — Memorie dell’ Accademia a erivolhurk Commereio ed Arti di 
Verona. Verona. 8. 


Abbreviations of the titles of literature XII 


Mem. Ac. Washington — Memoirs of the national Academy of Sciences. Washington. 4. 

Mem. Boston Soc. — Memoirs read before the Boston Society of natural History, being 
a new Series of the Boston Journal of natural History. Boston. 4. 

Mim. cour. Ac. Belgique — Mömoires couronnes et M&moires des Savants ötrangers, 
publies par l’Acad&mie Royale des Sciences, des Lettres et des Beaux-Arts 
de Belgique. Bruxelles. 4. 

Mem. Ist. Veneto — Memorie del Reale Istituto Veneto di Seienze, Lettere ed Arti. 
Venezia. 4. 

Mm. pres. Ac. St.-Pötersb. — M&moires presentes ä l’Acad&mie Imp6riale des Seiences 
de Saint-Pötersbourg, par divers . Savants, et lus dans ses Assemblees. 
St.-Pötersbourg. 4. 

Mm. Soc. Geneve — Mömoires de la Societ& de Physique et d’Histoire naturelle de 
Genöve. Genöve. 4. 

Mm. Soc. Kiew — Mömoires de la Soeiete des Naturalistes de Kiew. 3anueru 
Kiesckaro O6meersa Ecrecrpoucnsirarerei. Kiew. Kiers. 8. 

Mem. Soc. zool. France — M&moires de la Soeiete zoologique de France. Paris. 8. 

Middendorff, Reise Sibirien — Reise in den äussersten Norden und Osten Sibiriens 
während der Jahre 1843 und 1844 mit allerhöchster Genehmigung auf Ver- 
anstaltung der Kaiserlichen Akademie der Wissenschaften zu St. Petersburg 
ausgeführt und in Verbindung mit vielen Gelehrten herausgegeben von 
A. Th. v. Middendorff. — Band 2. Zoologie. Theil I, II. St. Petersburg. 
1851, 53. 4. 

Miers, Cat. Crust. N. Zealand — Colonial Museum and geological Survey Department .... 
Catalogue of the stalk- and sessile-eyed Crustacea of New Zealand. By Edward 
J. Miers. : London. 1876. 8. 

Milne Edwards, Hist. nat. Crust. — Histoire naturelle des Urustacös, eomprenant 
l’Anatomie, la Physiologie et la Classification de ces Animaux; par [Henri] 
Milne Edwards. Tom. 1-3; Planches. Paris. 1834, 37, 40. 8. 

Müller, Für Darwin — Für Darwin von Fritz Müller. Leipzig. 1864. 8. 

Müller, Zool. Dan., ed.3 — Zoologia Danica seu Animalium Daniae et Norvegiae rariorum 
ac minus notorum Desecriptiones et Historia. Auctore Othone „‚Friderico 
Müller. Ad Formam Tabularum denuo edidit Frater Auctoris “vol. 3:] 
Deseripsit et Tabulas addidit Petrus Christianus Abildgaard) ([Vol. 4:] 
Deseripserunt et Tabulas dederunt P.C. Abildgaard, M.Vahl, J.S.Holten, 
J.Rathke). [Editio 3.] Vol. 1-4. Havniae. 1788, 88, 89, 1806. 2. 

Nachr. Ges. Götting. — Nachrichten von der Königl. Gesellschaft der Wissenschaften 
und der Georg- Augusts-Universität zu Göttingen. Göttingen. 8. 

N. Acta Ac. Leop. — Nova Acta Academiae Caesareae Leopoldino-Carolinae Germanicae 
Naturae Curiosorum. Verhandlungen der Kaiserlichen Leopoldinisch-Caro- 
linischen Akademie der Naturforscher. Norimbergae (Erlangen ete.). 4. 

N. Acta Soc. Upsal. — Nova Acta Regiae Soeietatis Scientiarum Upsaliensis. Upsaliae. 4. 

Nansen, Norweg. North Polar Exp. — The Norwegian North Polar Expedition 1893— 1896. 
Seientifie Results. Edited by Fridtjof Nansen. Vol.1—6. London, Christiania, 
New York, Bombay, Leipzig. 1900—05. 4. 

Nardo, Prosp. Fauna Venet. — Prospetto della Fauna marina volgare del Veneto 
Estuario eon Cenni sulle prineipali Specie commestibili dell’ Adriatico, ecc. 
del Gio. Domenico Nardo. Estratto dall’ Opera: Venezia e le sue Lagune. 
Venezia. 1847. 4. 

Nardo, Sinon. Spee. Chiereghini — Sinonimia- moderna delle Speeie registrate nell’ Opera 
intitolato: Deserizione de’ Crostacei, de’ Testacei e de’ Pesci che abitano le 
Lagune e Golfo Veneto, rappresentati in Figure a Chiaroseuro ed a Colori 
dall’ Abate Stefano Chiereghini. Applicata per Commissione governativa 
dal Gio. Domenico Nardo. Venezia. 1847. 8. 

Nares, Voy. Polar Sea — Narrative of a Voyage to the Polar Sea during 1875—6 in 
H. M. Ships “Alert and “Diseovery by G. S. Nares. With Notes on the 

natural History, edited by H. W. Feilden. Vol. 1, 2. London. 1878. 8. 

Nat. Hist. Rev. — The natural History Review. A quarterly Journal. London. 8. 


XIV Abbreviations of the titles of literature 


Nat. Hist. Tr. Northumb. — Natural History Transaetions of Northumberland and Dur- 
ham and Neweastle-upon-Tyne|, being Papers read at the Meetings of the 
natural History Soeiety of Northumberland, Durham and Neweastle-upon- 
Tyne, and the Tyneside Naturalists’ Field Club. London (Newcastle). 8. 

Nat. Sci. — Natural Science. A monthly Review of seientifie Progress. London & 
New York (London). 8. 

Naturaliste — Le Naturaliste. Paris. 4. 

Naturh. Tidsskr. — Naturhistorisk Tidsskrift. Kjebenhavn. 8. 

Niederl. Arch. Zool. — Niederländisches Archiv für Zoologie. Haarlem, Leipzig (Leiden, 
Leipzig). 8. 

N. Mem. Soc. Moscou — Nouyeaux M&moires de la Soeciet& Imperiale des Naturalistes 
de Moscou. Moscou. 4. 

Norman & Scott, Crust. Devon Cornwall — The Crustacea of Devon and Cornwall by 
Canon A. M. Norman and Thomas Seott. London. 1906. 8. 

Norske Nordhavs- Exp. — Den Norske Nordhavys-Expedition 1876—1878. 'I'he Norwegian 
North-Atlantic Expedition 1876—1878. — 6. Bind (Volume). XIV & XV. 
Crustacea, I& II. Ved (By) G.O.Sars. Christiania. 1885, 86. 4. 

Norske Selsk. Skr. — Det Kongelige Norske Videnskabers-Selskabs Skrifter i det 19de 
Aarhundrede. Throndhjem. 4 (8). 

Nowv. Diet., ed.2 — Nouveau Dietionnaire d’Histoire naturelle, appliquöe aux Arts, 
& l’Agriculture, & ’Eeonomie rurale et domestique, ä la Medeeine, etc. Par 
une Soeiste de Naturalistes et d’Agrieulteurs. Nouvelle Edition. Tom. 1—6, 
7—18, 19—27, 28—86. Paris. 1816, 17, 18, 19. 8. 

Nyt Mag. Naturv. — Nyt Magazin for Naturvidenskaberne. Christiania.- 8. 

N. Zealand J. Sci. — The New Zealand Journal of Science. Dunedin. 8. . 

Öfv. Ak. Förh. — Öfversigt af Kongl. Vetenskaps-Akademiens Förhandlingar. Stock- 
holm. 8. 

Ov. Danske Selsk. — Oversigt over det Kongelige Danske Videnskabernes Selskabs 
Forhandlinger og dets Medlemmers Arbeider. Kjöbenhavn. 4 (8). 

P. Ac. Philad. — Proceedings of the Academy of natural Seiences of Philadelphia. 
Philadelphia. 8. 

Pallas, Mise. zool. — P.S. Pallas, Miscellanea zoologiea quibus novae imprimis atque 
obscurae Animalium Species deseribuntur et Observationibus Iconibusque 
illustrantur. Hagae Comitum. 1766. 4. 

Pallas, Reise Ruß. — P.S. Pallas Reise durch verschiedene Provinzen des Rußischen 
Reichs. Theil 1—3. St. Petersburg. 1771, 73, 76. 4. (2. Auflage: 1. Theil. 
St. Petersburg. 1801. 4.) 

Pallas, Spie. zool. — Spicilegia zoologica quibus novae |imprimis| et obseurae Ani- 
malium Species Iconibus, Deseriptionibus atque Commentariis illustrantur. 
Cura P.S. Pallas. Fascieulus 1—14. Berolini. 1767—80. 4. 

P. Amer. Ac. — Proceedings of the American Academy of Arts and Seiences. Boston 
and Cambridge. 8. 

Pam. Fizyjogr. — Pamietnik Fizyjografiezny. Warszawa. 4. 

Pap. Boston Soc. — Occasional Papers of the Boston Society of natural History. Boston. 8. 

Parry, J. third Voy. — Journal of a third Voyage for the Diseovery of a North-West 
Passage from the Atlantie to the Pacific; performed in the Years 1824—25, 
in His Majesty’s Ships Hecla and Fury, under the Orders of Captain William 
Edward Parry. London. 1826. 4. 

Parry, J. Voy. — Journal of a Voyage for the Discovery of a North-West Passage 
from the Atlantie to the Pacific; performed in the Years 1819—20, in His 
Majesty’s Ships Hecla and Griper, under the Orders of William Edward 
Parry. With an Appendix, containing the scientific and other Observations. 
[Cum Suppl.:] Appendix X, natural History (A Supplement to the Appendix 
of Captain Parry’s Voyage for the Discovery of a North-West Passage, in 
the Years 1819—20. Containing an Aceount of the Subjects of natural History). 
London. 1821, 24. 4. 


TE 


RER, 


| 
\ 
| 


Abbreviations of the titles of literature XV 


-P. Calif. Ac. — Proceedings of the California Academy of Sciences. —- [Ser. 3:] 
Zoology. San Francisco. 8. 

P. Dublin Univ. zool. bot. Ass. — Proceedings of the Dublin University zoological and 
botanical Association. Dublin. 8. 

Pennant, Brit. Zool., ed. 4 — British Zoology. [Preface:] Thomas Pennant. 4. Edition. 

Vol. 1-4. Warrington (London). 1776, 77. 8. 

Pennant, Brit. Zool., ed. 5 — British Zoology, a new [d.] Edition. Vol. 1—4. London. 
1812. 8. 

Philippi, Reise Atacama — Reise durch die Wüste Atacama auf Befehl der Chilenischen 
Regierung im Sommer 1853—54 unternommen und beschrieben von Rudolph 
Amandus Philippi. Halle. 1860. 4. 

Phil. Tr. — Philosophical Transaetions of the Royal Society of London. London. 4. 

Phipps, Voy. North Pole — A Voyage towards the North Pole undertaken by his 
Majesty’s Command 1773 by Constantine John Phipps. London. 1774. 4. 

P. Linn. Soc. N. S. Wales — The Proceedings of the Linnean Society of New South Wales. 
Sydney. 8. 

P. Liverp. biol. Soc. — Proceedings |[Vol. 4 & sequ.:] and Transaetions| of the Liverpool 
biologieal Society. Liverpool. 8. 

P. nat. Hist. Soc. Glasgow — Proceedings |and Transaetions |of the natural History 
Society of Glasgow. Glasgow. 8. 

2 phys. Soc. Edinb. — Proceedings of the Royal physical Society of Edinburgh. 
Edinburgh. 8. 

Pratz, Grundw. Thiere — Über einige im Grundwasser lebende Thiere. Beitrag zur 
Kenntnis der unterirdischen Crustaceen. Dissert. inaug. E. Pratz. Peters- 
burg. 1866. 8. 

P. R. Soc. Edinb. — Proceedings of the Royal Society of Edinburgh. Edinburgh. 8. 


- P. R. Soc. Tasmania — Papers and Proceedings of the Royal Society of Tasmania. 


Hobart. 8. 

P. R. Soc. Vietoria — Proceedings of the Royal Society of Vietoria. New Series. 
Melbourne. 8. 

Publ. Expl. Mer — Conseil permanent international pour l’Exploration de la Mer. 
Publications de Circonstance. Copenhague. 4. 

P. U. S. Mus. — Proceedings of the United States national Museum. Washington. 8, 

P. zool. Soc. London — Proceedings of the zoological Society of London. London. 8. 

Quart. J. geol. Soc. — The quarterly Journal of the geological Society of London. 
London. 8. 


' Rad Jugoslav. Ak. — Rad Jugoslavenske Akademije Znanosti i Umjetnosti. Zagreb. 8. 


Rafinesque, Anal. Nat. — Analyse de la Nature ou Tableau de l’Univers et des Corps 
organises. Par C.S. Rafinesque. Palerme. 1815. 8. 

Rafinesque, Ann. Nat. —- Annals of Nature or annual Synopsis of new Genera and 
Species of Animals, Plants, ete., discovered in North America by C. S. 
Rafinesque. First annual Number, for 1820. Lexington. 8. 

Rafinesque, Preeis Decouv. somiol. — Preeis des Döcouvertes et Travaux somiologiques 
de Mr. ©. S. Rafinesque-Schmaltz, entre 1800 et 1814. Ou Choix 
raisonne de ses prineipales Decouvertes en Zoologie et en Botanique, pour 
servir d’Introduetion & ses Ouvrages futurs. Palerme. 1814. . 12. 

Ray, Hist. Ins. — Historia Inseetorum. Autore Joanne Raio. Opus posthumum 
Jussu Regiae Societatis Londinensis editum. COdi subjungitur Appendix de 
Scarabaeis Britannieis, Autore M. Lister. Londini. 1710. 4. 

Rec. Austral. Mus. — Records of the Australian Museum. Sydney. 8. 

Recu. Passage Venus — Institut de France. Acadömie des Sciences. Recueil de 
M&moires, Rapports et Documents relatifs & ’Observatiou du Passage de Venus 
sur le Soleil. — Tom. 3. Partie II. Mission de !’Ile Campbell. Cum Atl. 
Paris. 1885. 4. 

Reise Novara — Reise der Österreichischen Fregatte Novara um die Erde in den 
Jahren 1857,1858, 1859 unter den Befehlen des Commodore B.vonWüllerstorf- 
Urbair. Wissenschaftlicher Theil. — Zoologischer Theil. 2. Band. III. Ab- 
theilung. Crustaceen. Beschrieben von Camil Heller. Wien. 1865. 4. 


FR 


xXVI Abbreviations of the titles of literature 


RBend. Soc. Borbon. — Rendieonto della Societä Reale Borbonica. Accademia delle 
Scienze. Napoli. 4. 

Rep. Brit. Ass. — Report of the... Meeting of the British Association for the 
Advancement of Seience. London. 8. 

Rep. Devonsh. Ass. — Reports of the Meetings and Transactions of the Devonshire 
Assoeiation for the Advancement of Seience, Literature and Art. Plymouth. 8. 

Rep. Fish. Board Scotl. — Annual Report of the Fishery Board for Scotland. — Part II. 
Scientifie Investigations. Edinburgh. 8. 

Rep. Peabody Ac. — Annual Report of the Trustees of the Peabody Academy of 
Sciences. Salem. 8. 

Rep. U. S. Fish Comm. — United States Commission of Fish and Fisheries. Report 
of the Commissioner. Washington. 8. 

Rep. U. S. geol. Surv. Terr. — Report of the United States geologieal jand geographical| 
Survey of the Territories.. Washington. 4. 

Rep. Voy. Alert — Report on the zoological Collections made in the Indo-Paeifie 
Ocean during the Voyage of H.M. S. „Alert“ 1881 —2. London. 1884. 8. 


Rep. Voy. Challenger — Report on the scientific Results of the Voyage of H. M.S. 
Challenger during the Years 1873 — 76 under the Command of George 
S. Nares and Frank Tourle Thomson. Prepared under the Superintendence 
of |the late| C. Wyville Thomson jand now of John Murray]. — Zoology. 
Vol. 29. (Part LXVII.) Report on the Amphipoda colleeted by H. M. S. 
Challenger during the Years 1873-76. By Thomas R. R. Stebbing. London, 
Edinburgh, Dublin. 1888. 4. 

Result. Camp. Monaco — Re£sultats des Campagnes scientifiques accomplies sur son 
Yacht par Albert Ier Prince souverain de Monaco. Publies sous sa 
Direetion avee le Concours de Jules de Guerne (Jules Richard). — 
Fascieule 16. Amphipodes provenant des Campagnes de l’Hirondelle 1885 — 
1888. Par Ed. Chevreux. Monaco. 1900. 4. 

Rev. biol. Nord France — Revue biologique du Nord de la France. Lille. 8. 

Rev. Sei. nat. — Revue des Scieces naturelles. Montpellier, Paris. 8. 

Risso, Hist. nat. Eur. merid. — Histoire naturelle des prineipales Productions de l’Europe 
meridionale et partieulierement de celles des Environs de Nice et des Alpes 
maritimes; par A. Risso. Tom. 1—5. Paris et Strasbourg. 1826. 8. 


Ritzema Bos, Bijdr. Crust. Hedriophthal. — Bijdrage tot de Kennis van de Urustacea 
Hedriophthalmata van Nederland en zijne Kusten. Akademisch Proefschrift ... 
door Jan Ritzema Bos. Groningen. 1874. 8. 

Rösel, Insecten-Belustig. — Der monathlich-herausgegebenen Insecten-Belustigung . 
Theil,... von August Johann Rösel von Rosenhof. Theil 1—4. Nürnberg 
[1746, 49], 55, 61. 4. 

Ross, App. sec. Voy. — Appendix to übe. Narrative of a second Voyage in Search of 

a North-West Passage, and of a Residence in the Arctie Regions during the 
Keane 1829, 30, 31, 82,33. By Sir John Ross. Inceluding the Reports of 
Commander, now Captain, James Clark Ross, and the Discovery of the 
northern magnetic Pole. London. 1835. 4. 

Ross, Voy. Baffin’s Bay — A Voyage of Discovery, made under the Orders of the 
Admiralty, in His Majesty’s Ships Isabella and Alexander, for the Purpose 
of exploring Baffın's Bay, and inquiring into the Probability of.a North- 
Western Passage. By John Ross. London. 1819. 4. 

Sabine, An. north. Exp. — An Account of the Animals seen by the late northern 
Expedition whilst within the aretic Cirele. Being No. X of the Appendix to 
Capt. Parry’s Voyage of Discovery. By Edward Sabine. London. 1821. 4. 

Samouelle, Ent. Compend. — The Entomologist’s useful Compendium; or an Introduction 
to the Knowledge of British Inseets. By George Samouelle. London. 1819. 8. 

Sars, Crust. d’Eau douce Norvege — Histoire naturelle des Orustaces d’Eau douce de 
Norvege. Par George Ossian Sars. 1. Livraison. Les Malacostraces 
Christiania. 1867. 4. 


Abbreviations of the titles of literature XVII 


"Sars, Crust. Norway — An Account of the Urustacea of Norway with short Desceriptions 

and Figures of all the Species by G.O.Sars. Vol. 1-4. Christiania and 

Copenhagen (Bergen). 1895 (1890—95), 99 (1896—9%), 1900 (1899—1900), 

03 (1901—08). 4. 

Savigny, Mem. An. s. Vert. — Mömoires sur les Animaux sans Vertebres; par Jules- 
Cesar Savigny. Partie 1, 2, Paris. 1816I, 16. 8. 

SB. Ak. Wien — Sitzungsberichte der Kaiserlichen Akademie der Wissonsehaften. — 
Mathematisch-naturwissenschaftliche Classe. Wien. 8. 

SB. Böhm. Ges. — Sitzungsberichte der Königl. Böhmischen Gesellschaft der Wissen- 

? schaften lin Prag|. — [ann. 1885 & sequ.:] Mathematisch-naturwissenschaftliche 

Classe. Prag. 8. 

£ Schr. Ges. Königsb. — Schriften der |Königlichen| physikalisch-ökonomischen Gesell- 
schaft zu Königsberg. Königsberg. 4. 

Scopoli, Ent. Carniol. — Joannis Antonii Seopoli Entomologia Carniolica exhibens 
Insecta Carnioliae indigena et distributa in Ordines, Genera, Species, Varietates. 
Methodo Linnaeana. Vindobonae. 1763. 8. 

Scoresby, Account arct. Regions — An Account of the aretic Regions, with a History 
and Description of the Northern Whale-Fishery. By William Scoresby, 
Jun. Vol.1,2. Edinburgh. 1820. 8. 

Scudder, Nomenel. zool. — Nomenclator zoologieus. An alphabetical List of all generie 
Names that have been employed by Naturalists for recent and fossil Animals 
from the earliest Times to the Close of the Year 1879. I. Supplemental - 
List. II. Universal Index. By Samuel H. Sceudder. Washington. 1882. 8. 

Slabber, Natuurk. Verlustig. — Natuurkundige Verlustigingen, behelzende microscopise 
Waarneemingen van in- en uitlandse Water- en Land-Dieren. Door Martinus 
Slabber. I-XVIII Stukje. Haarlem. 1778 (1769). 4. 

Slabber, Phys. Belustig. —- Physikalische Belustigungen oder mikroskopische Wahr- 
nehmungen in- und ausländischer Wasser- und Landthierchen. Von Martin 
Slabber. Aus dem Holländischen übersetzt von P.L. St. Müller. Nürnberg. 
1775. 4. 

Smithson. Contr. — Smithsonian Contributions to Knowledge. Washington, 4. 

Spolia Zeyl. — Spolia Zeylanica. Issued by the Colombo Museum, Ceylon. Colombo. 8. 

Svenska Ak. Handl. — Kongliga Svenska Vetenskaps-Akademiens Handlingar. Stock- 

he holm. 8(4). 

Syezda Russ. Est. — Tpyasi Cpbana Pycekuxs Ecrecrsonucwirareneit. [Arbeiten der Ver- 

sammlung Russischer Naturforscher.] 4. 
Tabl. enc. meöth. — Tableau encyelopedique et möthodique des trois Rögnes de la 
Nature. — Crustac&s, Arachnides et Insectes, par [Pierre Andr&] Latreille. 
{ Paris. 1818 [1797, 1818, 18—-].*) 4. 
Tijdschr. Nederl. dierk. Ver. — Tijdschrift der Nederlandsche dierkundige Vereeniging. 
s’Gravenhage (Rotterdam) (Leiden). 8. 
Tr. Amer. mier. Soc. — T'ransactions of the American mieroscopical Society. Buffalo. 8. 
Trav. Soc. St.-Pötersb. — Travaux de la Soeciet& Impöriale des Naturalistes de St.- 
Pötersbourg. Section de Zoologie et de Physiologie. St.-Pötersbourg. 8. 
Tr. Connect. Ac. — Transaetions of the Connecticut Academy of Arts and Sciences. 


iz en A he 
. 


BE Basen. u im am © 1 ana nal al hl uni Eu Lu bene 


New Haven. 8. « 
Tr. ent. Soc. London — The Transactions of the entomologieal Society of London. 
London. 8. 


Tr. Irish Ac. — Transactions of the Royal Irish Academy. Dublin. 4. 

Tr. Linn. Soc. London — The Transactions of the Linnean Society of London. : — 
[Ser. 2:] Zoology. London. 4. 

Tr. N. Zealand Inst. — Transactions and Proceedings of the New Zealand Institute. 
Wellington (Wellington, London). 8. 


*) Cfr.: C. Davies Sherborn & B. B. Woodward in: P. zool. Soe. London, 


1893 p. 584. 
u 


XVII Abbreviations of the titles of literature 


Tromse Mus. Aarsh. — Tromse Museums Aarshefter. Tromse. 8. 

Tr. Tyneside Club — Transactions of the Tyneside Naturalists’ Field Club. Neweastle- 
upon-Tyne. 8. 

Trudui Kazan. Univ. — Tpyası O6wmecrsa Ecrecrzoucnsirarezei mpu Hnmn. Kasauckoms 

“  Vumzepcurert. Kasanp. [Arbeiten der Gesellschaft der Naturforscher an der 

Kais. Kasanschen Universität. Kasan.] 4 (8). 

Tr. zool. Soc. London — Transactions of the zoological Society of London. London. 4. 

Udb. Hauchs — Det videnskabelige Udbytte af Kanonbaaden „Hauchs“ Togter i de 
Danske Have indenfor Skagen i Aarene 1883—86. Udgivet paa Bekostning 
af Ministeriet... ved ©. G. Joh. Petersen. Hefte 1—5. Kjöbenhavn. 
1889, 89, 90, 91, 93. 4. 

D. 8. expl. Exp. — United States exploring Expedition. During the Years 1838—42. 
Under the Command of Charles Wilkes. — Vol. 13. Part I, II. Crustacea. 
By James D. Dana. Cum Atl. Philadelphia. 1852, 52 [1853]; 55. 4 & 2. 

Vega-Exp. — Vega-Expeditionens vetenskapliga Jakttagelser. Bearbetade af Delta- 
gare i Resan och andra Forskare, utgifna af A. E. Nordenskiöld. Bandet 
1—5. Stockholm. 1882, 83, 83, 87, 87. 8. 

Verh. Ges. Wien — Verhandlungen der kaiserlich-königlicehen zoologisch-botanischen 
Gesellschaft in Wien. Wien. 8. 

Verh. Ver. Rheinlande — Verhandlungen des naturhistorischen Vereines der Preußischen 
Rheinlande. Bonn. 8. 

Vetensk. Ak. Handl. — Kong]. Vetenskaps-Akademiens Handlingar. Stockholm. 8. 

Vid. Meddel. — Videnskabelige Meddelelser fra den naturhistoriske Forening i Kjeben- 
havn for Aarene.... Kjebenhavn. 8. 

Viviani, Phosphor. Maris — Phosphorescentia Maris quatuordeeim luceseentium Animal- 
ceulorum novis Speciebus illustrata a Dominico Viviani. Accedit novi 


eujusdam Generis, e Molluscorum Familia Deseriptio et Anatome. Genuae. 


1805. 4. 

Voy. Nord — Voyages de la Commission seientifigque du Nord, en Scandinavie, en 
Laponie, au Spitzberg et aux Feröe, pendant les Annöes 1838, 39 et 40, sur 
la Corvette la Recherche, commandöe par Fabvre; publies par Ordre du Roi 
sous la Direetion de Paul Gaimard. — Zoologie. Planches. Paris. 2. : 

Weber, Reise Niederl. O.-Ind. — Zoologische Ergebnisse einer Reise in Niederländisch 

.  Ost-Indien. Herausgegeben von Max Weber. Band1—4. Leiden. 1890-—97. 8. 

White, Crust. Brit. Mus. — [Adam White] List of the Specimens of Crustacea in 
the Colleetion of the British Museum. London. 1847. 12. 

White, Hist. Brit. Crust. — A popular History of British Crustacea comprising a 
familiar Account of their Classification and Habits. By Adam White. 
London.‘ 1857. 16. 

Whymper, Trav. Great Andes — Travels amongst the Great Andes of the Equator by 
Edward Whymper. 1Vol. & supplementary Appendix. London. 1892, 91. 8. 

Wiss. Meeresunters. — Wissenschaftliche Meeresuntersuchungen. Herausgegeben von 
der Kommission zur wissenschaftlichen Untersuchung der Deutschen Meere 
in Kiel und von der biologischen Anstalt auf Helgoland. Neue Folge. Kiel 
und Leipzig. 4. 

Zaddach, Syn. Crust. Pruss. — Synopseos Crustaceorum Prussieorum Prodromus. 
Dissertatio... Die XI. M. Decembris 1844 publice defendet Ernestus 
Gustavus Zaddach. Regiomonti. 1844. 4. 

Zool. Anz. — Zoologischer Anzeiger. Leipzig. 8. 

Zool. J. — The zoologiecal Journal. London. 8. 

Zool. Rec. — The zoological Record. London. 8. 

Zweite D. Nordpolarf. — Die zweite Deutsche Nordpolarfahrt in den Jahren 1869 
und 1870 unter Führung des Kapitän Karl Koldewey. Herausgegeben 
von dem Verein für die Deutsche Nordpolarfahrt in Bremen. — 2. Band. 
Wissenschaftliche Ergebnisse. 8. Crustaceen. Bearbeitet von R. Buchholz. 
Leipzig. 1874. 8. 

Z. wiss. Zool. — Zeitschrift für wissenschaftliche Zoologie. Leipzig. 8. 


ut 


[An obelisk 7 


Bubhinodsa .. ....: . ı 


I. Leg. Gammaridea . 5 

-  1.Fam. Lysianassidae . . 8 
1.Gen. Kerguelenia Stebb. . . 11 

.1. K. compacta Stebb. . . . 12 
2. „ borealis'O. Sars . . . .. 12 
2,Gen. Trischizostoma Boeck 12, 717 
1. T. nicaeense (A. Costa) 18, 717 
3.Gen. Acidostoma Lili. . . 14 


E 1. A. obesum (Bate) . ... 14 
2 „ laticorne O0. Sars . . . 14 
E 4.Gen. Acontiostoma Stebb. . 15 
F 1. A. marionis Stebb.. . ... 25 
E 2. „ magellanicum Stebb. . 15 
4 5.Gen.Stomacontion Stebb. . 16 
3 1. S. pepinii (Stebb) - . . . 16 
7 6.Gen.Hirondellea Chevreux . 16 
’ 1. H. trioculata Chevreux . . 17 


m 


7.Gen. Podoprionella O. Sars . 17 
1. P. norvegiea O.Sars. .. 177 
8.Gen.Podoprion Chevreux . 18 
1. P. bolivari Chevreux . . . 18 
9,Gen.Euonyx Norm. ....1 
1. E. chelatus Norm. . . . . 19 

er 2 „ nomani Stebb. . 129 
10.Gen. Opisa Boeck . . ER! 
1. ©. eschrichtii Kia) a 


11.Gen.Sophrosyne Stebb. . . 21 
> 1. S. murrayi Stebb.. . . . 21 


2. „ robertsoni 

® Stebb. &D. Roberts. . . 21 
3. „ hispana (Chevreux) . .22, 717 

12.Gen. Valettia Stebb. . . . 22 
1. V. coheres Stebb. » . . . 2 


12*.Gen. Vijaya A. Walker 717 
1. V. tenuipes A. Walker 717 


Systematic Index. 


signifies that the generic or speeifie name is new.] 


13.Gen. Amaryllis Hasw. . 


1. A. haswelli Stebb. . 
2. „ macrophthalma Hasw. 
3. „ bathycephala Stebb. . . 


„ pulchella Bonnier . 
14.Gen. Onisimus Boeck 
O. edwardsii (Kroyer) . 
„ plautus (Kreyer) . 

„ normani (O. Sars) . 
turgidus (O. Sars) . 


„ earicus H. J. Hansen . 
„ leucopis (O. Sars) . 
„ affinis H. J. Hansen . . 


ae 


15. Gen. Cyphocaris Boeck . . 28, 


1. C. challengeri Stebb. . 
„ anonyxX Boeck 
„ richardi Chevreux 
„ alicei Chevreux . 
15*.Gen. Paracyphocaris 
Cheyreux 
1; P: praedator Ohswrene 
16.Gen. Cyclocaris Stebb. . . 
1. ©. tahitensis Stebb. 


> go 10 


2. „ guilelmi Chevreux . 31, 


16*,Gen.Lysianopsis S.J. Holmes 

1. L. alba S.T. Holmes . 
17.Gen.Lysianella O. Sars 

1. L. petalocera O. Sars . 

2. „ dellavallei Stebb.+ . 
18.Gen. Onesimoides Stebb. . 

1. O. carinatus Stebb.. - - » 
19.Gen. Pseudalibrotus Della 


a er 


1. P. litoralis (Kreyer) . . 
2. „ caspius O. Sarsı .... . 
II* 


page 


„ brevicaudatus H.J. Hansen 27 


28. 
717 


718 
33 
34 


page 
3. P. platyceras O. Sars. . . 34 
4. „ nanseni O.Sars. . . . 718 
5. „ glacialis O.Sars. . . . 718 
19*.Gen.Parambasia A. Walker & 
AB nat 
1. P. forbesii A.Walker& A.Seott 718 
20.Gen.Nannonyx O.Sars . . 34 
1. N. spinimanus A. Walker . 35 
„ Integricauda (Stebb.) . . 35 
„ goösii (Boeck) . . . . 36 
thomsoni Stebb.+ . . . 36 
„ kidderi (S. I. Sm.) . .. . 36 
21. Gen. Lysianassa M.-E.. 37,718 
L. plumosa Boeck . . . . 38 
„ bispinosa (Della Valle) . 38 
„ eubensis (Stebb.) -. . . 38 
longicornis H. Luc. . . 39 
. „ einghalensis (Stebb.) 39, 718 
„ variegata (Stimps.). . . 39 
„ punctata (A. Costa) . . 40 
„ eoelochir (A. Walker). . 718 
008 M-E. et 
„ nasuta Dana . . . . ..0 
„ Pilicornis Heller. . . . 40 
22.Gen. Perrierella Chevreux & 
E. L. Bow. .. | 
1. P. audouiniana (Bate). ee 8: 
23.Gen.Normanion Bonnier 41, 718 
1. N. quadrimanus (Bate & 


pgıor 


el EZ 


Westw) Nr ut el 
2.3: 3818 Bebb a 501 
3. „ abyssi Chevreux . . . . 718 


24.Gen. Paratryphosites Stebb. 42 
1. P, abyssi (Goß&s)... ...» . .: 48 
25.Gen. Paronesimus Stebb.. . 43 
1. P. barentsi Stebb. . -. .. 48 
26.Gen.Orchomene Boeck . . 4 


1. ©. serrata (Boeck).. . . . 4 
2. „ pectinata O. Sars . . . 45 
3. „ batei O.Sas. . . .. 8 
4. „ hanseni Meinert. . . . 46 
5. „ erispata (Goes) . . . . 46 
6. „ amblyops O. Sars . . . 46 


27. TR Socarnoides Stebb. . . 47 
1. S. kergueleni Stebb. . . . 47 
2. „ stebbingi (G. M. Thoms.) 47 

28.Gen. Menigrates Boeck . . 48 
1. M. obtusifrons (Boeck) . . 48 

28*,Gen.Charcotia Chevreux. . 718 
1. C. obesa Chevreux . . . . 718 


Systematic Index 


BE N a Zn 
re 


page 

29.Gen. Aristias Boeck . . 49, 718 
1. A. tumidus (Kroyer) . . . 9 

„ microps O. Sars. ... 
„ commensalis Bonnier. . 50 
neglectus H. J. Hansen . 50 
„ megalops O.Sars . . . 51 


Sappm 


30. ten. Ambasia Boeck . 51, 719 
1. A. danielssenii Boeck. .51, 719 
2. „ pulchra (H. J. Hansen) 52, 719 
2*,, murmanica Brüggen . . 719 
30*.Gen.Schisturella Norm... . 719 
1. S. pulehra (H. J. Hansen) . 719 
31.Gen.Ichnopus A. Costa . . 52 
1. I. spinicornis Boeck . . . 52 
2. „ taurus A. Costa... ... 58 
32.Gen.Anonyx Kröyer. . .». 53 
1. A. nugax (Phipps) . 


2. „ lagena Kröyer . . . '..54 
3. „ affinis Ohlin . } 55 
4. „ lilljeborgüi Boeck . . 55 
5. 


„ ampulloides Bate . . . 55 
32*.Gen. Socarnella A. Walker . 719 

1. S. bonnieri A. Walker. . . 719 
33.Gen.Socarnes Boeck . . . 56 


1. S. bidentieulatus (Bate). . 56 
2. „ vahlü (Kröyer)  . .. .- .) »57 
3. „ erythrophthalmus 


D::Roberls.. 0. 2m ed 
„ kroyeri (A. White) . . . 57 


5 Y 
34.Gen. Hippomedon Boeck . 58, 719 


1. H.holbölli (Kreyer) . . . 58 
2. „ dentieulatus (Bate) . . 59 
3. „ propingvus O.Sars . . 59 
4. „ robustus O.Sars . . . 59 
5. „ longimanus (Stebb.) . . 60 
6. „ geelongi Stebb.. . . . 60 
7. „ bidentatus Chevreux . . 719 
8. „ serratus S. J. Holmes . 719 
35.Gen.Glycerina Hasw. . . . 60 
1. G. tenuicornis (Hasw.) . . 61 
2. „ affinis Chilton . . ... 61 
35*, fan: Paracallisoma Cheyreux 719 


1. P. alberti Chevreux . . . 719 


36.Gen.Scopelocheirus Bate . 61 
1. S. hopei (A. Costa). » . . 62 
2. „ erenatus Bitte . .» . . 62 

37.Gen. Alicella Chevreux.. . . 63 
1. A. gigantea Chevreux . . . 68 


„ topsenti Chevreux . . . 718 


üigeh 


a 


Fi se N u an la a a 5 tz 


nn 


ER 


Jr 
Fi 


 38.Gen.Uristes Dana - . - - 
1. U. gigas Dana FERN 
2. „ umbonatus (O. Sars) . 

39.Gen. Centromedon 0. Sars 65, 720 


1. C. calearatus (O. Sars) 65 
2. „ produetus (Goes) 66 
3. „ pumilus (Lilj.) . : 66 
4. „ typhlops (0. Sars) . . . 66 
5. „ erenulatus Chevreux . . 720 


 40.Gen.Cheirimedon Stebb. 66, 720 


1. C. erenatipalmatus Stebb. . 67 
2. „ latimanus (O. Sars) 67 
3. „ fougneri A. Walker 5120 
4. „ hansoni A. Walker . . 720 

5. „ dentimanus Chevreux . 720 


 41.Gen. Tryphosella Bonnier 67, 720 


1. T. barbatipes (Stebb.). 68 
2. „ abyssi Norm. . 2780 
42.Gen. Tryphosa Boeck . 68, 720 
1. T. insignis Bonnier. 75009 
2. „ kergueleni (Miers) . . 69, 720 
3. „ trigoniea (Stebb.) 70 
4. „ pusilla (©. Sars) . 70 
5. „ sarsi (Bonnier) 70 
6. „ angulata O. Sars 70 
7. „ compressa O.Sars. .. TI 
8. „ nanoides (Lillj.) . 71 
9. „ horingii Boeck 71 
10. ,„ adarei A. Walker . . . 720 
11. „ murrayi A. Walker. 720 
12. „ nugax S. J. Holmes . 720 
13. „ eucullata A. Walker . 720 
43.Gen. Chironesimus O. Sars . 72 
1. C. debruynii (Hoek) 72 
44.Gen. Eurythenes S. I. Sm. 72 
1. E. gryllus (Leht.) 73 
45.Gen. Tmetonyx Stebb.+ .73, 720 
1. T. eicada (©. Fabr.) 74 
2. „ miersi (Stebb.) 75 
3. „ acutus (O. Sars) . I 
4. „albidus (O.Sarı) ... 7 
5. „ eieadoides (Stebb.). . . 75 
6. „ similis (O. Sars) . 2.70 
7, „ leucophthalmus (O.Sars) 76, 720 

8. „ caeculus (O. Sars) . 76 
ig, „ exiguus (Chevreux). . . 720 
10. „ stebbingi (A. Walker) . . 720 
46.Gen. Tryphosites O. Sars. 77 
1. T. longipes (Bate & Westw.) 77 


page 

47.Gen. Lepidepecreum Bate & 
Westw. F N! 
1. L. typhlops Honnier, +18 
2. „ foraminiferum Stebb.. 79 
3. „ elypeatum Chevreux .79, 720 
4. „ longicorne (Bate & Westw.) 80 
5. „ umbo (Goös) . . - 80 
48. dan. Orchomenella 0. Sars 81, 720 
1. O. laevis Bomier . . 8 
2. „ nanus (Kroyer) 81 
3. „ Ppinguis (Boeck) . 82 
4. „ minuta (Kroyer). 82 
5. „ groenlandica (H.J. sin) 83 
6. „ dilatata Chevreux . 720 
7. „ pinguides A. Walker . . 721 
8. „ franklini A. Walker . 721 
9. „ macronyx Chevreux . 721 
49, in: Orchomenopsis 0. Sars83, 721 
1. ©. museulosa (Stebb.) 84 
2. „ abyssorum (Stebb.) 84 
3. „ obtusa O. Sars 85 
4. „ zschauii (Pfeff.) . 85 
5. „ proxima Chevreux . 72 
6. „ chevreuxi Stebb.+. . . 721 
7. „ nodimana A. Walker . . 721 
8. „ rossi A. Walker . . er. 
50.G@en.Katius Chevreux .. 721 
1. K. obesus Chevreux . . . 721 
Alibrotus M.-E. ; 85 
Anonyx albus Gosse 85 
„ amaurus Giles 85 
„ annulatus Bate 86 
„.,„broechüi Gatta.... +... 86 
„  elegans W. Thomps. 86 
„. exiguus Stimps. . 86 
„ femoratus Pfeff. . 86 
„ filiger Stimps.. 86 
BOUS lie 2 2er U 
„ .nardonis Heller . - -....: 86 
„ nobilis Stimps. RE Re. 
„ pallidus Stimps. . - - . . 86 
„  politus Stimps. 86 
„ . punctatus Bate ..86 
„ schmardae Heller 87, 721 
». SP, Bate. 87 
„ 8P., Della Valle 87 
sp., G. M. Thoms. 87 
Lysianassa affinis Hasw. . - - 87 
„  australiensis Hasw.. . . . 87 
brasiliensis Dana 87 


„ 


XXU Systematie Index 
page page 
Lysianassa chauseiea M.-E.. . . 87 10. A. australis Hasw. . . . 104 
35 20H MDR Bobs... taten. ie RT ‚11. „ rubella A. Costa 104, 722 
„  fisheri Lockington . 87,721 12. „ amblyops O. Sars . 105, 722 
„  marina Bate . 487,721 13. „ pusilla O. Sars. . . . 10 
„ martensi Goes . »... . 87 14. „ anomala O. Sars . . . 106 
„ nitens Hasw. ae.) 15. „ spinipes Boeck . . . 106 
„ woodmasoni Giles . . . . 88 16. „ aequicornis Bruz.. . . 106 
Orchomene grimaldii Chevreux . 88 17. „ serraticaudata Cheyvreux | 
Stenia Dana. . . Ela OB : 107, 722 
„ magellanica ah Ar, lie 18. „ diadema (A. Costa) . . 107 


19. „ acinaces Stebb. . . . 108 


; 20. „ spinimana Chevreux 109, 722 
2. Fam. Stegocephalidae . 88 21. , compact Nom: ng 


1.Gen. Phippsia Sichb.4 92.4.8089 2. “ typica (Bate) 0. ©1208 


1. P.ampulla (Phipp) . . . 8 23. „ zamboangae Stebb. . . 110 
2. „ gibbosa (0. Sarsı) . . . 9 24. „ tenuicomis Lil. . . . 110 


2.Gen. Stegocephalus Kroeyer . 90 25. „ sarsi Chevreux . . 111 
1. S. inflatus Kreyer .. .. 9 26. „ compressa 8. J. 722 
2. „ similis ©. Sars . 91 27. „ tridens A. Walker . . 792 


3.Gen. Stegocephaloides O.Sars 91 28. „ scabripes A. Walker .. 722 
29. „ brachyceras A. Walker. 722 


1. S. christianiensi 9,9 
R on « 30. „ cyelops A. Walker . . 722 
2. „ auratus (O. Sarsı) . . . 9 31 hassen "a9 

. . { er . 

4.Gen. Andaniopsis O. Sars. . 92 r agassizi (Judd) a ra 
1. A. nordlandica (Boeck) . . 9 je daleyı dit 2 u 
5.Gen. Andaniella O. Sars -. . 93 : japonica Bate2..: 8804147 
1. A. pectinata (O. Sa) .. 9 „ limicola (Stimp.) . . 11 


6.Gen. Andaniexis Stebb.+. . 9 
1: A. abyssi (Boeck) . : . . 9 
„ Spinescens (Aleock) . . 95 
7.Gen. Parandania Stebb. . . 9 
1. P. böoecki (Stebb.) .:. .. ... 9 


„ nordmanni (M.-E) . . 111 
„ pelagica (Stimps.) . 111, 722 
„ pugetica Stimps. . . . 111 
2.Gen.Byblis Boeck ... . 11 
1. B. erythrops O.Sars . . 112 


8.Gen. Andaniotes Stebb. . .. 9% 2. „ abyssi O.Sars...... . 113 
1. A. eorpulentus (G. M. Thoms.) 96 In gaimardii (Kreyany 2,188 

; 4. „ longicornis O. Sars . . 113 

9. Gen. Euandania Stebb.. . . 97 5. effnisD, Sare o etc: Me 
1. B. gigantes (Stebb) . . 97 6. „ erassicornis Metzg. . . 114 

7. „ guernei Cheyreux . 114, 722 

Stegocephalus latus Hasw. . . . 9 8. „ serrata S.LSm. - . . 114 
9. „ kallarthra Stebb... . . 115 

3. Fam. Ampeliscidae. . . 9 10. „ lepta (Gile) . . . . 115 


1.Gen. Ampelisca Kroyer. .98, 722 3.Gen.Haploops Lil. . . . 116 
1. A. eschrichtii Kreyer . 100, 721 1. H. dellavallei Stebb.7 116, 722 
2. „ brevicornis (A. Costa) .. 100 2. „ tubicola Lil. .. .. 17 
3. „ macrocephala Lil. . 101 3. „ laevis Hoek . ee 
4. „ gibba O. Sars . 101 4. „ setosa Boeck 117 
5. „ chiltoni Stebb. . 102 5. „ robusta O. Sars . 118 
6. „ fusca Stebb. . 102 Ä | 
7. „ odontoplax O. Sars .103 | 4.Fam. Haustoriidae . 118, 722 
8. „ uncinata Chevreux 108, 721 1.Gen.Bathyporeia Lindstr. . 119 
9. „ abyssicola Stebb. . 104 1. B. guilliamsoniana (Bate) . 120 


2.Gen. Platyischnopus Stebb.122,722 
1. P. mirabilis Stebb. 123 
2. „ neozelanicus Chilton 123 
3. „ herdmani A. Walker 722 
3.Gen.Haustorius St. Müll. 124 
1. H. arenarius (Slabber) 125 
4.Gen.Cardenio Stebb. . 125 
1. C. paurodaetylus Stebb. 126 
5.Gen.Priseillina Stebb. 126 
1. P. armata (Boeck) 126 
6.Gen. Pontoporeia Kroyer 127 
1. P. mierophthalma O. Sars . 127 
2. „ femorata Kroyer . 128 
3. „ affınis Lindstr. . 128 
„ .K0yi S.I. Sm. . 128 
7.Gen. Urothoe Dana . 128, 722 
1. U. abbreviata O. Sars 129 
2. „ marina (Bate) . 130 
3. „ grimaldii Chevreux 130 
4. „ pulchella (A. Costa) . 130 
5. „ poucheti Chevreux . 131, 722 
6. „ brevicornis Bate 131 
7. „ elegans Bate 3 
8. „ spinidigitus A. Walker . 722 
9. „ poseidonis Reib. 722 
„. bairdii Bate . 132 

„ irrostrata Dana 132 

“ ma Gles . ...... 132 
8.Gen. Urothoides Stebb. . 132 
1. U. lachneössa (Stebb.) 132 
5. Fam. Phoxocephalidae. 133 
1.Gen. Phoxocephalus Stebb. 134 
1. P. holbölli (Kroyer) . . 134 
2. „ bassi Stebb. 135 
3. „ kergueleni Stebb, 135 
„ erythrophthalmus (Catta) 136 

„ geniculatus (Stimps.) 136 

„ obtusus (Stimps.) . - 136 

'„ simplex (Bate) . 136 
2.Gen. Leptophoxus O. Sars . 136 
1. L. faleatüus (0. Sars) . 136 

| 3.Gen. Paraphoxus O. Sars 137, 723 
1. P. oeulatus (O. Sars) 137° 


'Systematie Index 


page 
2. B. pelagiea (Bate) 120 
3. „ gracilis O. Sars 121 
4. „ robertsoni Bate 121 
5. „ pilosa Lindstr. . 121 
„ lindströmi Stebb.+ 122 


XXIII 


page 
2. P. maculatus (Chevreux) 138, 723 


3. „ Spinosus S. J. Holmes 723 

4.Gen. Metaphoxus Bonnier . 138 
1.M. typieus Bonnier 138 

2. „ fultoni (T. Seott) 139 

3. „ pectinatus (A. Walker) . 139 

5.Gen.Harpinia Boeck . . 140,723 
1. H. mucronata O. Sars 141 

2. „ crenulata (Boeck) . 141 

3. „ pectinata O. Sars . 142 

4. „ serrata O. Sars . . 142 

5. „ excavata Chevreux .142, 723 

6. „ antennaria Meinert 143 

7. „ propinqua O. Sars 143 

8. „ obtusifrons Stebb. 143 

9. „ plumosa (Kroyer) 144 

10. „ truncata O. Sars a 
11. „ abyssi O. Sars . .. 144 
12. „ laevis O. Sars 145 
13. „ latipes Norm. ; 723 
6.Gen. Pontharpinia Stebb. 145 
1. P. pinguis (Hasw.) 146 

2. „ rostrata (Dana) 146 

„ grandis (Stimps.) . 147 


„ uneirostrata (Giles) .147, 723 


7.Gen. Parharpinia Stebb. 147 
1. P. villosa (Hasw.) . 147 
6. Fam. Amphilochidae 148 


1.Gen. Amphilochus Bate 149, 723 
1. A. manudens Bate 150 


2. „ neapolitanusDellaValle150,723 
3. „ tenuimanus Boeck 150 
4. „ marionis Stebb. 151 
5. „ brunneus Della Valle 151 
6. „ spence-batei (Stebb.) 723 


„ longimanus Chevreux 151, 723 

„ melanops A. Walker . 152 

„ oculatus H. J. Hansen . 152 
2.Gen. Amphilochoides O0. Sars 


152, 723 
1. A. boeckii ©. Sars . 152,723 
2. „ odontonyx (Boeck) 153 


3. „ Intermedius T.Seott . 153 
4. „ longimanus (Chevreux) . 723 
3.Gen. Gitanopsis O. Sars . 153 
1. G. bispinosa (Boeck) . 154 
2. „ inermis (O. Sars) . 154 
3. „ arctica O.Sars . 155° 


4.Gen.Gitana Boeck . ... 15 
1. G. sarsi Boeck . 155 


XXIV Systematic Index 


page page 
2. G. abyssicola O. Sars . . 156 3. Gen. Paraleucothoe Stebb. . 169 
3. „ rostrata Boeck. . . . 156 1. P. novaehollandiae (Hasw.) 169 


5.Gen. Tetradeion Stebb. . . 157 
1. T. erassum (Chilton). . -. 157 | 8. Fam. Anamixidae . . . 10 


6.Gen. CyproideaHasw. . 157, 723 1.Gen. Anamixis Stebb. . 170, 724 
1. C. ornata (Hasw.).. . - .. 158 1. A. hanseni Stebb.. '. . . 170 
2. „ otakensis (Chilton) . . 723 2. „ stebbingi A. Walker. . 724 


7.Gen. Stegoplax 0. Sars . . 158 Br 
1. S. longirostris O. Sars . . 159 | 9.Fam. Metopidae . .. . ızı 


8.Gen. Peltocoxa Catta . . . 159 1.Gen.Metopa Boeck . . 172,724 

1. P. marioni Catta . . . . 160 1.M.esmarki Boeck. . . . 173 

„ brevirostris (T. & A. Seott) 2. „ robusta O. Sars . . 173,724 

160, 723 3. „ sinuata O.Sarsı . . . 174 

9.Gen. Paracyproidea Stebb. 160 4. „ propinqua O. Sars . . 174 

1. P. lineata (Hasw) . . . 160 5. „ palmata O. Sars . . 174,724 

10.Gen.Gallea A. Walker . . 728 6. „ elypeata (Kroyer) . . 175,724 

1. G. teeticauda A. Walker . 728 7 m dert KBate a oe EEE 

ERTE 8. „ spectabilis O. Sars . . 176 
AmphilochussquamosusG. M.’Thoms. 161 IR x re J. Hansen Bi 3 
Probolium serratipes Norm. . 161, 723 11. „ norvegica (Lij) . . . 177 j 
„ spence-batei Stebb. . . 161,728 12, „ boeckii O. Sars. . . . 178 4 
a 13. „ leptocarpa O. Sars . . 178 

7. Fam. Leucothoidae . . 161 14. „ longicornis Boeck . . 179 

1.Gen.Seba Bate . .: . 162, 724 15. „ pusilla O. Sars. .. . 179 
1. S. innominata Bate . . . 162 16. „ aequicomis O. Sars . . 180 j 
2. „ saundersii Stebb. . 163, 724 17. „ borealis O. Sars . . . 180 . 
3. „ armata Chevreux . . . 724 18.;, rubrovittata O. Sars . . 180 
2.Gen.Leucothoe Leach .163,724 | 19. „ sölsbergi J.S. Sch... . 181 1 
1. L. traillii &. M. Toms... .. 194 |. 2% „ tenuimana, 0, Bars... .. 181 
2. „ pachycera Della Valle . 164 21. „via DL Da Ser } 
REES 165 22. „ abscisa Norm. . .\. . 724 { 
ers 23. „ quadrangula Reib. . . 724 i 
4. „ furina (Sav) 0... .. 165 ” 1 
5. „ spinicarpa (Abildg.). . 165 2.Gen.Metopella O. Sars . . 182 : 
6. „ commensalis Hasw. . . 166 1.M.nasuta (Boeck). . . . 12 
7. „ tridens Stebb. . - - - 166 2. „ nasutigenes (Stebb.) . . 183 , 
8. „ brevidigitata Miers . . 167 3. „ ovata (Stebb.) . . . . 183 .4 
9. „ richiardii Mich. Lessona 167 4. „ neglecta (H. J. Hansen). 14 © 
10. „ ineisa D. Roberts. . . 167 5. „ carinata (H. J. Hansen) . 184 

11. „ lilljeborgii Boeck . 167, 724 6. „ longimana (Boeck) . . 185 

12. „ euryonyx A. Walker. . 724 3.Gen. Metopoides DellaValle 185 
13. „ hornelli A. Walker . . 724 1. M. magellanieus (Stebb.) . 185 
14. „ stegoceras A. Walker . 724 2. „ parallelocheir (Stebb.) . 186 j 
„ affinis Stimps. . . » .. 168 3. „ compactus (Stebb.) . . 186 - 
„ antarctica Pfefl. . . . 168 4.Gen.Proboloides Della Valle Be 
„ erassimana Kossm. . . 168 187, 725 2 
„ diemenensis Hasw. . . 168. 1. P. grandimanus (Bonnier) . 187 5 

„ gracilis Hasw. . . . .. 168 2. „ erenatipalmatus (Stebb.) 188 

„ grandimana Stimps. . - 168 3. „ bruzelii (Goes). . » - 188 

„ stylifera Stimps. . . +» 16 4. „ gregarius (O. Sars) . . 189 


nn N ET a a DR ET ee 
a re ES? aa er Er 
TER ee a 3 


“ P. calcaratus (O. Sars) . . 
6. „ glacialis (Kroyer) . 
7. „ groenlandieus = RK 
Hansen) 190, 
„ sarsii (Pfefl.). » » - - 
F 5 _Metopa normani Hoek 
10. Fam. Cressidae. 
1.Gen.Cressa Boeck . . - 
1. C. dubia (Bate). . . - 
2. „ minuta Boeck . . . - 
3. „ abyssicola O. Hars 
11. Fam. Stenothoidae. . 192, 
1.Gen.Stenothoe Dana . . 192, 


. richardi Chevreux . 
„ valida Dana . 
„ peltata S. I. Sm. 
„ antennulariae Della Valle 
cattai Stebb.+ . \ 
„ elypeata Stimps. .195, 
„ monoeuloides (Mont.) 
„ dollfusi Chevreux . . 196, 
. „ tenella O. Sars. 
megacheir (Boeck) 
mierops O. Sars 
„ marina (Bate) . 
bosphorana Sowinski 
brevicornis O. Sars 
adhaerens Stebb. . 
setosa Norm. I 
. „ eypris S. J. Holmes . 
minuta S. J. Holmes 
alaskensis S. J. Holmes 
gallensis A. Walker . 

„ guerinii (Bate) . 

„ longimana (Bate) . 

„ miersii (Hasw.). 
2.Gen. Parametopa Chevreux . 

1. P. kervillei Chevreux 


3.Gen. Stenothoides Chevreux 
1. S. perrieri Chevreux . 


. 198, 


11*. Fam. Ingolfiellidae 
1.Gen.Ingolfiella H. J. Hansen 
1. I. abyssi H. J. Hansen . 
2. „ littoralis H. J. Hansen . 


page 
189 
189 


725 
190 


190 


190 


191 
191 
192 
192 


725 


725 
194 
194 
194 
195 
195 
725 
196 
7125 
196 
197 
197 
725 
198 
199 
199 
725 
725 
725 


725° 


725 


Systematie Index 


XXV 
page 
12. Fam. Phliantidae . . . 200 
1.Gen. Phlias Guer. 200 
1. P. serratus Guer. . 201 
2.Gen. Pereionotus Bate & 
Westw.. - .» >72 4208 
1. P. testudo (Mont). . 201, 726 
3.Gen.Palinnotus Stebb. . 202 
1. P. thomsoni (Stebb.). . . 202 
4.Gen.Iphiplateia Stebb. . 203 
1. I. whiteleggei Stebb. . . 203 
5.Gen.Iphinotus Stebb. 204 
1. I. typieus (G. M. Thoms.) 204, 726 
6.Gen. Bircenna Chilton 205 
1. B. fulva Chilton 205 
Gen. Kuria A.Walker&A. Scott 726 
K. longimana A. Walker & 
Ara nr 1,70 
13. Fam. Colomastigidae 206 
1.Gen. Colomastix Grube . 206 
1. ©. brazieri Hasw. . OR 
2. „ pusilla Grube . ..... 207 
3. „ hamifera Kossm. . 207 
14. Fam. Lafystiidae . . 208 
1.Gen. Lafystius Kroyer 208 
1. L. sturionis Kroyer 208 
15. Fam. Laphystiopsidae . 209 
1.Gen.Laphystiopsis O. Sars 209 
1. L. planifrons O. Sars . 209 
16. Fam. Acanthonotozo- 
matidae 210 
1.Gen. Odius Lillj. . 210 
1. O. carinatus (Bate) 211 
2.Gen. Panoploea G. M. Thoms. 211 
1. P. spinosa G. M. Thoms. 212 
2. „ eblanae (Bate) . 212 
3. „ minuta (O. Sars) . 213 
„ ambigua (Hasw.) . 213 
3.Gen.Iphimedia H. Rathke . 214 
1. I. obesa H. Rathke 214 
2. „ pulchridentata Stebb. 215 
3. „ pacifica Stebb. . 215 
4. „ nodosa Dana - 216 
„ bormani R.O. Oasis. 217 
‚ stimpsoni Bate. i 217 
4.Gen. Acanthonotozoma 
Boeck ä 218 
1. A. serratum (0. Fabr) . 218 


XXVI 


2, A. eristatum (J. C. Ross) . 
3. „ inflatum (Kroyer) . 
17. Fam. Pardaliscidae 
1.Gen.Halicoides A. Walker . 
1. H. anomalus A. Walker. 
2.Gen.Pardalisca Kroyer . 
1. P. abyssi Boeck 
2. „ tenuipes O. Sars 
3. „ euspidata Kroyer . 
4. „ marionis Stebb. . 
3.Gen. Pardaliscoides Stebb.. 
1. P. tenellus Stebb. . 
4.Gen. Nieippe Bruz.. . . - 
1. N. tumida Bruz. - . .. 
5.Gen.Synopioides Stebb.. 
1. S. macronyx Stebb. . 
„ Secundus Stebb. : 
6.Gen.Pardaliscella O. Sars . 
1. P. boeckii (Malm) . 
2. „ axeli Stebb.+ 
7.Gen.Halice Boeck . 
1. H. abyssi Boeck 
18. Fam. Liljeborgiidae 
1.Gen. Liljeborgia Bate. 
1.3. pallida (Bate) 
„ brevicornis (Bruz.) 
„ macronyx (O. Sars) . 
„ fissicornis (Sars) 
„ eonsanguinea Stebb.. 
„ dubia (Hasw.) - 
„ kinahani (Bate) 
„ dellavallei Stebb.+ 
„ bispinosa (A. Costa) . 
„ pugettensis (Dana) . 234, 
2.Gen.Idunella O. Sars . 
1. I. aequicornis (O. Sars) 
2. „ pieta (Norm.) 


A 


19. Fam. Oedicerotidae 
1.Gen. Perioculodes O. Sars 237, 
1. P. longimanus (Bate & 
WORWN 
2. „ Serra A. Walker 
„ aequimanus (Kossm.) 
„ megapleon (Giles) 
2.Gen. Gulbarentsia Stebb. 
1. G. hoeki Stebb. Ä 
3.Gen. Exoediceros Stebb.. 
1. E. fossor (Stimps.). 


Systematie Index 


page 
219 


page 

4.Gen. Pontocrates Boeck.. . 239 
1. P. altamarinus (Bate & 

Westw;) PR nr 

2. „ arctieus O. Sars . .... 240 

3. „ arenarius (Bate) . . . 241 

5.Gen. Synchelidium O. Sars 241 

1. S. haplocheles (Grube) . . 242 

2. „ maculatum Stebb.+. . 242 


3. „ tenuimanum Norm. . . 243 


4. „ intermedium O. Sars . 243 
6.Gen.Oediceros Kroyer .243, 726 
1. O. saginatus Kroyer . . . 244 
2. „ borealis Boeck. . . . 244 
3. „ newnesi A. Walker . . 726 

„ latrans (Hasw.). . . . 285 
7.Gen. Paroediceros O. Sars . 245 
1. P. macrocheir (O0. Sars) . 245 
2. „ intermedius Stebb.+ . 245 
3. „ eurvirostris CH. J. Hansen) 246 
4 


. „ Iynceus (Sars) . . . . 246 
5. „ propinquus (Goes) . . 246 
8.Gen.Haliereion Boeck . . 247 
1. H. aequicornis (Norm.) . . . 247 


9.Gen. Arrhis Stebb.+ . 248, 726 
1. A. phyllonyx (Sars) . . . 248 
10.Gen.Westwoodilla Bate . 249 
.W.brevicalear (Goes) . . 249 


..„ caecula (Bate) +... . 2.2000 


1 
2 
3. „ megalops (O. Sars) . . 250 
4. „ acutifrons (O. Sars) . . 251 
5 


„ rectirostris (Della Valle) 251» 


11.Gen. Carolobatea Stebb.. . 252 
1. C. schneideri (Stebb.) . . 252 

12.Gen.Oediceropsis Lilli... . 252 
1. OÖ. brevicornis Lillj. . =» . 253 

13.Gen. Acanthostepheia Boeck 


253, 726 
1. A, malmgreni (Goes). . . 254 
2. „ pulchra Miers . 254, 726 


„ behringiensis (Lockington) 

254, 726 

14.Gen. Aceroides O. Sars . . 254 
1. A. latipes (O. Sars) ... . 255 
15.Gen. Bathymedon O0. Sars . 255 
1. B. obtusifrons (H. J. Hansen) 256 

2. „ saussurei (Boeck) . . . 256 
3. „ longimanus (Boeck) . . 257 
4. „ acutifrons Bonnier . . 257 
16.Gen.Monoculopsis O. Sars 257 
1.M. longicornis (Boeck) . . 258 


Er page 
 17.Gen. Monoculodes Stimps. 258, 727 
1.M. gibbosus Chevreux 259, 726 
2. „ hanseni Stebb. . . . . 260 
3. „ longirostris (Goes). . . 260 
4. „ kröyeri Boeck . . . . 261 
5. „ pallidus O. Sars. . . . 261 
6. „ earinatus (Bate) . . . 261 
7... „ griseus (Della Valle) . . 262 
8. „ borealis Boeck . . . . 262 
9, „ schneideri ©. Sars. . . 263 
10. „ crassirostris H.J. Hansen 263 
11. „ latimanus (Goes) . . . 264 
12. „ tesselatus J. S. Schn.. 264 
13. „ simplex H.J. Hansen . 264 
14. „.tubereulatus Boeck . . 265 
15. „ norvegieus (Boeck) . . 265 
subnudus Norm. . . . 266 
17. „ packardi Boeck. . . . 266 
18. „ tenuirostratus Boeck. . 267 
edwardsi S. J. Holmes . 727 
„ demissus Stimps. . . . 267 
18.Gen.Oediceroides Stebb. . 267 
1. O.rostratus (Stebb.) . . . 268 
„ proximus Bonnier . . . 269 
einderella Stebb. . . . 269 
„ ornatus (Stebb.) .. . . 270 


Oedicerus novi-zealandiae Dana 270 


20. Fam. Synopiidae . . . . 270 


1.Gen.Synopia Dana . . . . 27 
1. S. ultramarina Dana. . . 271 
2. „ scheeleana Bovall. . . 272 

„ angustifrons Dana. . . 272 


„ earaibica Bovall. . . . 273 
„ orientalis Kossm. . . . 273 


21. Fam. Tironidae . 273, 722 
1.Gen.Bruzelia Boeck. . . . 274 
1. B.typiea Boeck. . .. . 274 


2. „ tuberculata O. Sars . . 275 
2.Gen. Tiron Lillj. .275, 727 
1. T. acanthurus Lil. . . . 276 
2. „ thompsoni A. Walker. . 727 
3.Gen. Argissa Boeck . .276, 722 
1. A. hamatipes ‚(Norm.). . . 277 
2. „ stebbingi Bomnier. . . 277 


4.Gen.Astyra Boeck . . . . 278 
1. A. abyssi Boeck. . . . . 278 
5.Gen.Syrrhoites O.Sars . . 279 


- 1. S. serratus (O. Sars) . . . 279 


Systematic Index 


XXVI 


page 

2. S. fimbriatus (Stebb. & D. 
Koberigyi: 7 2,25.280 
3. „ walkeri Bonnier. . . . 281 
3 levis (Boeck) . - . . . 281 
6.Gen.Syrrhoe Goös . . . . 381 
1. S. erenulata Goes‘. ... . .282 
2. „ semiserrata Stebb. . . 283 
3. „ papyracea Stebb. . . . 283 
7.Gen. Pseudotiron Chevreux 284 
1. P. bouvieri Chevreux.. . . 284 


22. Fam. Calliopiidae 285, 727 
1.Gen.Laothoes Boeck . . . 286 
1. L. meinerti Boeck. . . . 286 

„ carcinophilus (Chevreux) 


287, 727 
1*. Gen. Bouvierella Chevreux 727 
1. B. careinophila (Chevreux) 727 
2.Gen.Chosroes Stebb. . . . 287 
1. C.ineisus Stebb. . . . .. 287 
3.Gen.Sancho Stebb. . . . . 288 


1. S. platynotus Stebb. . . . 288 » 
4.Gen. Amphithopsis Boeck . 289 
1. A. longicaudata Boeck . . 289 
5.Gen.Halirages Boeck . . . 2% 
.H.nilssoni Ohlin . . ... 290 
„ fulvoeinetus (Sars) . . 291 
huxleyanus (Bate). . . 291 
„ quadridentatus O. Sars. 292 
„ batei (R. O. Cunningh.) . 292 

„ megalops (Buchh) . . 29 
6.Gen. Leptamphopus O0. Sars 293 


> 0 m 


1. L. longimanus (Boeck) . . 293 
2. „ novaezealandiae (G.M. 
THOWW. year A 


6*.Gen. Oradarea A. Walker . 727 

1. O. longimana A. Walker . 727 
7.Gen. Paraleptamphopus Stebb. 

294 

1. P. subterraneus (Chilton) . 294 

2. „ eaeruleus (G. M. Thoms.) 295 


8.Gen.Calliopius Lilli. . . . 29 
1. ©. laeviusculus (Kröyer). . 296 
2. „ rathküi (Zadd.) . . . . 296 

„ pietus (Giles). . . . . 297 
9.Gen. Paracalliope Stebb.. . 297 


1. P. fluviatilis (G. M. Thoms.) 297 
10.Gen. Harpinioides Stebb. . 298 
1.H.drepanocheir Stebb. . . 298 
11.Gen. Atylopsis Stebb. . .299, 727 


XXVII Systematie Index 


page page 
1. A. dentata Stebb. . . . . 29 5.Gen.Sympleustes Stebb.. . 317 


2. „ emarginata Stebb.. . . 300 1. S. megacheir (A. Walker) . 317 
3. „ latipalpus A. Walker & 2. „ latipes Sar). . x. . 817 
2 NN RE U Er 3. „ grandimanus (Chevreux) 
12.Gen. Cleippides Boeck . . 300 318, 728: 
1. C. trieuspis (Kroyer) . . . 301 4. „ glaber (Boeck) . . . . 318 
2. „ quadricuspis Heller . . 301 5. „ pulchellus (©. Sars) . . 319 
13.Gen. Stenopleura Stebb.. . 302 6. „ olrikii (H. J. Hansen) . 319 


1. S. atlantica Stebb. . . . 302 6.Gen. Dautzenbergia Chevreux 728 


14.Gen. Haliragoides ©. Sars . 303 1. D. grandimana (Chevreux).. 728 
1. H. inermis (O. Sars) . . . 308 Gen. Parapleustes Buchh. . 320 
15.Gen. Apherusa A. Walker 304, 727 P. gracilis Buchh. . . . . 320 
1. A: eirrus (Bate) .... . . . 304 
2. „ tridentata (Bruz) . . . 305 | 24. Fam. Paramphithoidae 320 
3. „ bispinosa (Bate). . . . 305 1.Gen. Epimeria A. Costa . 321,728 
4. „ megalops (O. Sars) . . 306 1. E. parasitica (Sars) . . . 321 
5. „ glacialis (H. J. Hansen). 307 2. „ loricata O. Sars. . . . 322° 
6. „ jJurinei (M.-E) . . . . 807 3. „ comnigera (F) . ... . 38 
7. „ georgiana (Pfefl) . . . 308 | . 4, „ tuberculata O. Sars . . 828 
8. „ gracilis S. J. Holmes. . 727 5. „ Inermis A. Walker. . . 728 
9. „ dlevei O. Sars ..... . 727 2.Gen.Paramphithoe Bruz. . 324 
10. „ ovalipes Norm. . . . . 727 1. P. buchholzi (Stebb.).. . . 324 
” antiqua (Bate) '. » . .. 727 2. „ hystrix (J. C. Ross) . . 325 
„ barretti (Bate) . . . . 308 3. „ polyacantha (J. Murdoch) 325 
” laevis (Hasw.) TE Ar 308 j cuspidata (Lepech.) . . 326 
„ translucens (Chilton). . 308 


3.Gen. Actinacanthus Stebb.+ 326 


a 1. A. tricarinatus (Stebb.) . . 326 


S. gracilis Pfeff.. . . . . 308 


23. Fam. Pleustidae . . . . 309 
1.Gen.Pleustes Bate . . . . 309 


25.Fam. Atylidae . . . . .. 397 
1.Gen. Atylus Leach . . .828, 728 


1. P. panoplus (Kröyer). . . 310 “ A. pn “. Er RR = 
2. „ eataphraetus (Stimps.) . 310 a ER 

“ medius (Go8s) ET ER ABIT 2.Gen. Nototropis A. Costa 329, 798 

„ oeeidentalis (Stimps) . 311 1. N. falcatus (Metzg.) . . . 330 

„ tubereulatus Bate. . . 311 2. „ swammerdamei (M.-E.) 380 
2.Gen. Neopleustes Stebb.+ 311, 728 3. „ vedlomensis(Bate&W estw.) 331 
1. N. pulehellus (Kreyer) . . 312 4. „ guttatus (A. Costa) . . 381 
2. „ boeckii (H. J. Hansen) . 312 d. n nordlandicus (Boeck). . an 
3. „.bieuspis (Kröyer) . . . 318 6. „ smitti (Go8s) BEE ie 
4. „ monocuspis (O. Sars). . 313 1. y homoehir ae) Re 
5. „ brevicornis (0. Sars).. . 318 8. „ minikoi (A. Walker) . . 728 
6. „ assimilis (0. Sars). . . 314 9:\; granulosus (A. Walker) . 728 
7. „ bairdi (Boeck). . . ‘. .. 314 „ Villosus (Bate) . . . . 3834 
8. „ paeificus (A. Walker) . . 728 


„ pugettensis (Dana). . . 728 | 26. Fam. Melphidippidae 334. 728 


3.Gen.Mesopleustes Stebb. . 315 1.Gen. Melphidippa Boeck . 335. 
1.M. abyssorum (Stebb.) . . 315 1.M.goösi Stebb. . . » . . 385 
4.Gen. Stenopleustes 0. Sars . 316 2. „ macrura O. Sars . . . 8336 
1. S. malmgreni (Boeck) . . 316 3. „ borealis Boeck . . . . 3836 
2. „ nodifer (O. Sars) . . . 316 4. „ serrata (Stebb.). . . » 8337 


U ON RELET GUFDRER -AERHEHEN “ 


GL ERFR De Kia | = gl Lil 2 ne Ara aaa 


page 


.„Melphidippella 0. Sars 337 


1.M. macra (Norm.) . 337 
3.Gen.Hornellia A. Walker 728 
1.H. incerta A. Walker . 728 
27. Fam. Eusiridae . .338, 728 
1.Gen. Eusirus Kroyer .338, 729 
1. E. cuspidatus Kroyer. 339 
2. „ propinquus O. Sars 340 
3. „ antareticus G.M. Thoms. 340 
4. „ longipes Boeck . 341 
5. „ leptocarpus O. Sars . 341 
6. „ biscayensis Bonnier . 342 
7. „ minutus O. Sars 342 
8. „ holmü H. J. Hansen . 342 
9. „ laevis A. Walker 729 
2.Gen. Eusiropsis Stebb. 343 
1. E. riisei Stebb. 343 
3.Gen. Eusiroides Stebb. .345, 729 
1. E. monoculoides (Hasw.) . 345 
2. „ dellavallei Chevreux . 346 
3. „ erassi Stebb. 346 
4. „ sarsi ser ; 729 
5. „ orchomenipes A. Walker 729 
„ lippus (Hasw.) . 346 
4.Gen. Cleonardo Stebb.. 346 
1. C. longipes Stebb.. . . 347 
2. „ appendiculatus (0. Sars) 347 
5.Gen. Rhachotropis S.I.Sm. 347 
1. R. aculeata (Lepech.) . 348 
2. „ kergueleni Stebb. . 349 
3. „ grimaldii (Chevreux) 350, 729 
4. „ elegans (Bonnier) . . 350 
5. „ oculata (H. J. Hansen) . 350 
6. „ inflata (O. Sars). 351 
7. „ helleri (Boeck) . 351 
8. „ macropus O.Sars. . . 352 
9. „ leucophthalma O.Sars . 353 
10. „ rostrata (Bonnier) . 353 
‚11. „ graeilis (Bonnier) . 353 
6.Gen. Rozinante Stebh.. 354 
1. R. fragilis (Goös) 354 
7.Gen. Eusirogenes Stebb.. . 728 
1. E. dolichocarpus Stebb.. 728 
28. Fam. Bateidae 2 8355 
1.Gen.Batea Fr. Müll.. . . 855, 729 
1. B. catharinensis Fr. Müll. . 355 
2. „ secunda S. J. Holmes 729 


Systematie Index 


29. Fam. Pontogeneiidae 


1.Gen. Eurymera Pfeff. 

1. E. montieulosa Pfeft.. 
2.Gen. Bovallia Pfeff. . 

1. B. gigantea Pfeft. . 
3.Gen. Stebbingia Pfeff. . 

1. S. gregaria Pfeff. 
4.Gen. Pontogeneia Boeck . 

1. P. inermis (Kröyer) 

2. „ magellanica (Stebb.). 
danai (G. M. Thoms.). 
„ eapensis (Dana). 

„ fissicauda (Dana) . 


„ tasmaniae (G. M. Thoms.) 361 
5.Gen. Zaramilla Stebb. . 361 
1. Z. kergueleni Stebb. . 361 
6.Gen. Atyloides Stebb. . .362, 729 
1. A. serraticauda Stebb. .362, 729 
2. „ gabrieli Sayce 729 
3. „ fontanus Sayee . 729 
7.Gen. Paramoera Miers. 363 
1. P. austrina (Bate) . 363 
a simplex (Dana) . 363 

30. Fam. Gammaridae . .364, 729 
1.Gen. Boruta Wrzesn. 367 
1. B. tenebrarum Wrzesn. . 368 
2.Gen.Synurella Wrzesn. 368 
1. S. ambulans (Fr. Müll.) . 369 
2. „ polonica Wrzesn. 369 
3.Gen.Paracrangonyx Stebb. 369 
1. P. compactus (Chilton) . 369 
4.Gen.Apocrangonyx Stebb. 370 
1. A. lueifugus (O. P. Hay) 370 
5.Gen.Crangonyx Bate . .370, 729 
1. C. subterraneus Bate. 371 
2. „ flagellatus Benediet .371, 730 
3. „ vitreus (Cope) 372 
4. „ tenuis S. I. Sm.. .. 872 
5. „ bifureus O. P. Hay .378, 730 
6. „ recurvus (Grube) 373 
7. „ bowersü €. J. Ulr. 729 
-„ ermannii (M.-E.) 373 
6.Gen.Hyalellopsis Stebb.. 374 
1. H..czyrnianskü (Dyb.) . . 374 
7.Gen.Pallasea Bate . .374, 730 
1. P. dybowskii Stebb. 375 
2. „ reissnerii (Dyb.) 376 
3. „ ‚cancellus (Pall.) .376, 730 
4. „ gerstfeldtii (Dyb.). .377, 730 


XXX Systematie Index 


page page: 
5. P. quadrispinosa O. Sars 377,730 | 19.Gen.Micruropus Stebb. . . 398 
6. „ kesslerii (Dyb.). . .378, 730 1.M.puella (Dyb). . ... . 399 
7. „ baikali Stebb. . . .378, 780 2. „ inflatus (Dyb.), » 2. -. 399 
8. „ brandtii (Dyb.) . . .379, 730 3. „ Vortex (Dyb.);.. 2% 400° 
9. „ grubii (Dyb.). . . .879, 730 4. „ talitroides (Dyb.) . . . 400 
10. „ cancelloides (Gerstf.) 380, 730 5. „ littoralis (Dyb). . . . 401 
„ dryshenskii (Garjajeff) . 730 | 6. „ glaber (Dyb). . . . . 401 
„ meyerii (Garjajeff). . . 730 7. „ rugosus (Dyb.) . . . . 402 
„ nigra (Garjajeff). . . . 780 8. „ wahlü (Dyb.). . . . . 402 
, viridis (Garjajeff) . . . 730 9... Axgenli (Dyb.) ..°..,..% 2 208 
8.Gen. Weyprechtia Stuxb. . 380 10. „ porla (Dyb):. ,..;  2M 
1.W.heuglini (Buchh.) . .381, 730 11. „ klukii (Dyb.).. . . . . 408 
2. „ pinguis (Kröyer) . . . 382 12. „ pachytus (Dyb.). . . . 404 
9,Gen.Paramicruropus Stebb. 382 20.Gen.Neoniphargus Stebb. 404, 731 . 
1. P. solskii (Dyb.). . . . . 382 1. N. thomsoni Stebb. . .404, 731 
2. „ taczanowskii (Dyb.) . . 382 2. „ spenceri (Sayce). . . . 731 
10. Gen.Parapherusa Stebb.7 . 383 3. „ fultoni Sayce. . . . . Tal 
1. P. crassipes (Hasw.) . . . 888 „ moniezi (Wrzesn.). . . 405. 


11.Gen.Amathillopsis Heller . 384 '21.Gen. Niphargus Schiödte 405, 731 
1. A.spinigera Heller . . . 384 .N. eroaticus (Jurinae). . . 406 
2. „ affinis Miers Wr. %.%. 22885 m forelüi Humb.. . . . . 406 

. „ australis Stebb.. . . . 885 « „ aquilex Schiödte . . . 406 


1 
2 
3 
12.Gen.Gammarellus Herbst . 386 4. „ stygins OR) a 
1. G. homari (F.) 387 5. „ puteanus (C. L. Koch) . 407 
ER a rn, B.:4 virei Chevreux . . .408, 731 

2. „ angulosus (H. Rathke) . 387 n font » 
„ earinatus (H. Rathke) . 388 Er ontanus Bate . . .408, 731 
9 


. „ Kochianus Bate . 408, 731 
>] *. [2 r} 
18; Bea Sarah Stebb. 388, 730 . „ oreinus Joseph . . . . 408 


1. E. mueronatus (S. A. ge E 10. „ godeti Wrzesn. ... . . 409 
9 andern N 11. „ mortoni G. M. Thoms. . 731 
er Br a en rd 12. „ pulchellus Saycee . . . 731 
; ER ii ni 2.8 S Me es 13. „ plateaui Chevreux . ... 731 
..„ graciis ( nr 0‘ 14. „ ladmiraulti Chevreux. . 731 
5. „ antennatus (Pack.) .390, 731 casparianus Wrzesn 409 
” ; > 
14. TR EERENENR Stebb. 391, 731 „ easpary (Pratz) . . .409, 731 
1. A. spinosa (0. Sars) . . .. 391 „ elegans Garbini.. . . 409 
ee Sm och a, 3 \ 392, 2 2 re n Costa) 410 
N .Brachyuropus Stebb. . miınutus (Gerv. a a 
u. D, En (Dyb.).. » » 8398 i montanus (A. Costa). . 410 
2. „ reichertii (Dyb.) . . . 89 „ pontieus Czern. . . 410 
16.Gen.Macrohectopus Stebb.+ 394 „ rhipidiophorus (Catta) 110, 732 
1. M. branickü (Dyb.). . . . 394 „ subterraneus (Leach) 410, 732 
17.Gen.Cardiophilus O. Sars . 395 ‚ tatrensis Wrzesn. . . . 410 
1. C. baeri 0. Sars . . RL .:895 |  21*. Gen. Bathyonyx Vejd. . . 729 
18.Gen.Brandtia Bate . . . . 39 1. B. devismesi Vejd.. . . . 729 
1.3; lata (Dyb) 2107 22,008 21**,Gen. Pseudoniphargus 
2. „ latissima (Gerstf.) . . . 396 Chevreux. . . RE 
3. „ tubereulata (Dyb.). . . 397 1. P. africanus Cheyrenk: 82720 
4. „ morawitzii (Dyb.) . . . 397 22.Gen.Eriopisa Stebb. . .411, 732 
5. „ smaragdina (Dyb.) . . 398 1. E. elongata (Bruz) . . . 411 
6. „ fasciata Stebb. . » . . 898 2. „ sechellensis Chevreux . 732 


ud + u Ta Se 


in ee te ice aa 7 el ae 
N ' (ar a rad. 2 ' 


ES a Aa a a 


Ba a en a ı Dale ln 5 J Be Far 
Ta“ IR A. b TEN" » a A rn 
® g ER TER M ae 


a a a u ne 


'23.Gen. 
1.6. 


an, 


Gmelina O. Sars . 
costata O. Sars . 

„ kusnezowi (Sowinski). 
laeviusceula O. Sars 
pusilla O. Sars . 


.Gmelinopsis O. Sars 


tubereulata ©. Sars 
aurita O. Sars. 


.Hakonboeckia Stebb. . 
.strauchü (Dyb.). 
.BaikalogammarusStebb. 
. pullus (Dyb.) . 
.Parelasmopus Stebb. 417, 
. suluensis (Dana) 


setiger Chevreux 


.Cheirocratus Norm.. 
.sundevallii (H. Rathke) . 


intermedius O. Sars . 
robustus O. Sars 
assimilis (Lilj.) . 


.Megaluropus Hock . 
2 agilis Hoek 
.Melita Leach 

. pallida OÖ. Sars . 


quadrispinosa Vosseler . 
fresnelii (Aud.) . 

nitida S. I. Sm. . 
pellueida O. Sars . 
coroninii Heller . 
palmata (Mont). 
obtusata (Mont.) 
amoena H. J. Hansen 
formosa J. Murdoch . 
dentata (Kreyer) 
gladiosa Bate. 

richardi Chevreux . $ 
parvimana S. J. Holmes 
zeylanica Stebb. 
appendiculata (Say) . 
confervicola (Stimps.) 
gayi (Nie.) . 


inaequistylis Be 199, 


oxyura Catta . 
Sp., F. Brandt. 
„ SP., Stimps. 


.Paraceradocus Stebb... 

. miersii (Pfeff.) 
.Ceradocus A. Costa. 

. rubromaculatus (Stimps.) 


semiserratus (Bate) 


‚417, 


„421, 


page 
412 
412 
413 
413 
414 


4 
414 
415 


415 
415 


416 
416 


732 
732 
732 
417 
418 
419 
419 
419 
420 
420 
732 
422 
422 
423 
424 
424 
424 
425 
426 
426 
427 
427 
428 
732 
732 
732 
428 
428 
428 
732 
429 
429 
429 
429 
429 
430 
430 
431 


Systematie Index 


XXXI 

page 

3. C. orchestiipes A. Costa. . 432 
4. „ torelli (Goes). 432 
33.Gen.Maera Leach 433, 732 
1. M.tenera ©. Sars 434 
2. „ quadrimana (Dana) . 434 
3. „ grossimana (Mont.) 435 
4. „ inaequipes (A. Costa) 435 
5. „ temuimana (Bate) . 436 
6. „ westwoodi Stebb. . 436 
7. „ fureicornis (Dana). 437 
8. „ hamigera (Hasw.) . 437 
9. „ tenella (Dana) 438 
10. „ loveni (Bruz.) 438 
11. „ othonis (M.-E.) . 438 
12. „ mastersii (Hasw.) . 439 
13. „ dubia Calm. £ 132 
14. „ hirondellei Chevreux . 732 
15. „ othonides A. Walker . 732 
„ albida (Dana). 440 

„ aspera (Dana) 440 

„ danae (Stimps.) . 440 

„ fusca (Bate) 440 

„ indica (Dana). 440 

„ Kürgensis (Gerstf.). 440 

„ massavensis (Kossm.) 440 

„ pubescens (Dana) . 440 
34.Gen.Elasmopus A. Costa 441, 732 
1. E. subcarinatus (Hasw.). 441 
2. „ diemenensis (Hasw.) . 442 
3. „ suensis (Hasw.) . 442 
4. „ brasiliensis (Dana) 443 
5. „ poeillimanus (Bate) . 443 
6. „ delaplata Stebb. 444 
7. „ rapax A. Costa . 444 
8. „ viridis (Hasw.) 445 
9. „ boeckii (Hasw.) . 445 
10.. „ insignis Chevreux . 732 
11. „ sokotraeA.Walker&A.Seott732 
12. „ dubius A. Walker . 732 
13. „ spinimanus A. Walker . 733 
14. „ serrula A. Walker . 733 
15. „ latibrachium A. Walker 733 
„ erassimanus (Miers) . 445 

„ erythraeus (Kossm.) . 446 

„ miersi (Wrzesn.) 446 

„ peruvianus (Dana). 446 
35.Gen. Plesiogammarus Stebb. 446 
1. P. gerstaeckeri (Dyb.) 446 
36.Gen.Iphigenella O. Sars . 447 
1. I. acanthopoda O. Sars. 447 


XXXII Systematic Index 


page page 
37.Gen. Pandorites O. Sars. . 448 23. G. simoni Chevreux . . . 47 
1. P. podoceroides O. Sars . 448 24. „ duebeniü Lil. . . .473, 733 
38.Gen. Pherusa Leach. . . . 449 25. „.:pulex (1)... % 474 
1. P. fucicola Leach . . . . 49 26. „ delebeequei Chevisur & 
39.Gen. Niphargoides O. Sars. 450 | Guerne . . ne 
1. N. caspius O. Sars . . . 450 27. „ hyaeinthinus Dyb.. a, ı- 
2. „ corpulentus O. Sars . . 451 28. „ syriacus Chevreux. . . 475 
3. „ compactus O. Sars . .' 451 29.5 locusta: Ch.) 1. 022 
4. „ grimmi O.Sars ». . . 452 30. „ camylops Leach . . . 476 
5. „ quadrimanus O. Sars . 452 31. „ limnaeus 8.I. Sm. . . 788 
6. „ aequimanus O. Sars. . 453 32. „ sarsii Sowinski . . . . 783 
7. „ borodini O. Sars . . . 458 33. „ australis Sayce . . . . 733 
40.Gen. Phreatogammarus Stebb. 453 34. „ tetrachantus Garbini. . 733 
1. P. fragilis (Chilton) . . . 454 35. „ haasei Sayce. . . 733 
41.Gen. OmmatogammarusStebb.454 36. „ propinquus W. P. Hiy, 733 
1. O. albinus (Dyb) - .» . . 455 37. „ purpurascens W. P. Hay 733 
2. „ farus (Dyb.). . 2... 2.455 „ tunetanus E. Sim.. . . 477 
3. „ earneolus (Dyb) . . . 456 45. Gen. Poekilogammarus Stebb. 477 
4. „ amethystinus (Dyb.). . 456 1. P. pictus (Dyb). .. . ..22498 
42.Gen. Odontogammarus Stebb. 456 |: 2. „ orchestes (Dyb) . . . 478 
1. O. calearatus (Dyb) . . . 457 | : 3. „ talitrus (Dyb.) . ... . 478 
2. „ margaritaceus (Dyb.) . 457 4. „ araneolus (Dyb.) . . . 479 


43. Gen. Dikerogammarus Stebb. 458 | 46.Gen.Echinogammarus Stebb. 479 


1. D. macrocephalus (©. Sars) 458 1. E. berilloni (Catta). . . . 481 
2. „ haemobaphes (Eichw.) . 458 2. „ verrucosus (Gerstf.) . . 481 
3. „ grimmi (0. Sars) . . . 459 3. „ saphirinus (Dyb.) . . . 482 
4. „ verreauxii (Bate) . . . 459 4. „ ezerskii (Dyb) . . . . 482 
5. „ fasciatus (Say)... . 460 5. „ maacküi (Gerstf) . . . 483 
44, Gen: Gammarus F.. . .460, 733 6. „ lividus (Dyb) . »... 48 
1. G. guernei Chevreux . .462, 733 7. „ viridis (Dyb) . 2... 484 
2. „ abbreviatus O. Sars . . 462 8. „ cyaneus (Dyb).. . . . 484 
3. „ annulatus S.I. Sm. . . 463 9, „ ochotensis (F. Brandt) . 484 
4. „ natator S.I. Sm. . . . 463 |. 10. „ testaceus (Dyb.) . . . 485 
5. „ obesus O. Sars . . . . 464 11. „ sophiae (Dyb.) . . . . 48 
6. „ macrurus O. Sars . . . 464 12:>,° IaBens (Byb).. 27% 1 So 
7. „ compressus O. Sars . . 465 13. „ murinus (Dyb.). . . . 486 
8. „ subnudus ©. Sars . . . 465 14. „ aheneus (Dyb.). . . . 487 
9. „ deminutus Stebb.Y . . 466 15. „ sarmatus (Dyb) . . . 487 
10. „ similis O. Sars . ... . 466 16. „ capreolus (Dyb.) . . . 488 
ll. „ weidemanni O. Sars. . 467 17. „ ussolzewi (Dyb.) . . . 488 
12. „ maeoticus Sowinski . . 467 18. „ stenophthalmus (Dyb.) . 489 
13. „ erassus O. Sars. . . '. 467 19. „ schamanensis (Dyb.). . 489 


14. „ warpachowskyi O. Sars. 468 20. „ leptocerus (Dyb.) . . . 490 
15. „ pauxillus O. Sars . . . 469 21. „ toxophthalmus (Dyb.) . 490 
16. „ kietlinskii Dyb.. . . . 469 22. „ vittatus.(Dyb) . » .. .:491 


17. „ andrussowi O. Sars . . 469 23. „ petersü (Dyb.) . . . . 4 
18. „ ischnus Stebb. . . . . 470 24. „ violaceus (Dyb.) . . . 492 
19. „ plaeidus ©. Sars . . . 470 26.:, Ibex (Dyb) :.%........5 SDR 
20. „ platycheir O. Sars. . . 471 26. „ parvexii (Dyb.). . . . 49 


21. „ pungens M.--R.. . . . arı 27. „ polyarthrus (Dyb.) . . 49 
22. „ marinus Leach . . . . 472 „ mutilus (Abildg.) . . . 49 


page 
7.Gen. Heterogammarus Stebb. 494 
1. H. stanislavii (Dyb.) . . . 49 
„ sophianosü (Dyb.). . . 49 
„ eapellus (Dyb.). . . . 49 
„ ignotus (Dyb.) . . . . 49 
BOLD. de ana. 0486 
„ albulus (Dyb.) . .» » . 496 
„ bifaseiatus (Dyb.).. . . 496 
„ branchialis (Dyb.). . . 497 
48.Gen.Parapallasea Stebb. 497, 733 
. borowskii (Dyb.) . .498, 733 
lagowskii (Dyb.) . .498, 733 
puzyllii (Dyb.) . . .498, 734 
.Amathillina O. Sars . 499 
. cristata O. Sars ... .'49 


re a 


maximoviczi O. Sars . 500 
spinosa O.Sars. . . . 501 
affınis ©. Sars . . . . 501 
.Carinogammarus Stebb. 
501, 734 
C. cinnamomeus (Dyb.). . 502 
„ wagii (Dyb.).. . . .502, 784 
„ pulehellus (Dyb.) . . . 508 
„ seidlitzi Dyb). . . . 508 
rhodophthalmus (Dyb.). 504 
„.caspius (Pal) .. . .. 504 
. „ atchensis (F. Brandt). . 505 
. „ subcarinatus (Bate) . . 505 
. „ roeselii (Gerv.) . . . 506 
macrophthalmus (Stimps. ) 506 
mucronatus (Say) . .506, 734 
roseus (Garjajeff) . . . 734 
ruber (Garjajeff). . . . 734 
.Gammaracanthus Bate 507 
. lacustris O. Sars . . . 507 
loricatus (Sab.). . . . 508 
caspius O. Sars. . . . 508 
.Acanthogammarus Stehb. 
508, 734 
.cabanisii (Dyb.). . .509, 734 
zienkowiczii (Dyb.) .509, 734 
„ godlewskii (Dyb.).. .510, 734 
„ radoszkowskii (Dyb.) 510, 735 
„ armatus (Dyb.).. . .511, 735 
‚parasiticus (Dyb.).. .511, 735 
labbei Chevreux. . . . 734 
‚ albus (Garjajeff). . . . 734 
„ balkirii (Garjajeff).. . . 734 
„ flavus (Garjajeff) . . . 734 


eonFnppmH 
S 


pusilla O0. Sars . . . . 500. 


Systematic Index XXXIll 


page 
A. korotneffii (Garjajeff). . 734 
„ maximus (Garjajeff) . . 734 


Gammarus caudisetus Viv.. . . 512 
». «hilonsis. Nie’. .....4 2.0, BI8 
„ ereinnatus. Vi... .. . 512 
„ crassimanus Viv. . . . .. 512 
„. .dubius: Johnst: -......:. ... 512 
„ fabellifer Stimps. . . . . 513 
„  fontinalis A. Costa. . . . 518 
.. Minus. Say. zn 2. 518 
„ . peloponnesius Guer. . . . 518° 
„  podurus Abilde.. . . . . 513 
 »0BVI MARS Bl 
BER A Re 
5 RB Bieso Dura DEN BE 


31. Fam. Dexaminidae. . . 514 
1.Gen.Dexamine Leach . .514, 735 
D.spinosa (Mont). . . .. 515 
„ thea Boeck . . . 516 
spiniventris (A. Costa) . 516 
„ blossevilliana Bate . . 517 
„ serraticrus A. Walker . 735 
-'„ anisopus (Grube) . . . 517 
„ leptonyx (Grube) . . . 517 


ae a 


„. miersii Hasw. . . . . 51% 
„ seitulus Harford . . . 517 
2.Gen. Tritaeta Boeck. . . . 517. 
1. T. gibbosa (Bate) . . . . 517 


3.Gen. Paradexamine Stebb... 518. 
1. P. pacifica (G. M. Thoms.). 518 
4.Gen. Polycheria Hasw. .519, 735. 
1. P. antarctica (Stebb.). . . 520. 
2. „ tenuipes Hasw. . . . 2 520 
3. „ atolli A. Walker. . . . 735. 
5.Gen.Guernea Chevreux . . 521 
1. G. coalita (Norm.) . . .521, 735 

2. „ nordenskiöldii (H. J. 
Hansen) . . re DAR 
„ flindersi (Stebb.) ie. 522 
33, Fam. Talitridae. ar ER 
1.Gen. Talitrus Latr. . . . . 54 
1. T. sylvaticus Hasw. . . . 524 
2. „ alluaudi Chevreux. .525, 735 
3. „ saltator (Mont). . . . 53 
4. „ gulliveri Miers . 2. . 526 
„ eloquetii (Aud.). . . . 526 
„ fissispinosus (Kossm.) , 526 

In 


XXXIV Systematie Index 


page page . 7 
2.Gen. Talitroides Bonnier. . 527 10. T. megalophthalma (Bate) 549 2 
1. T. bonnieri Stebb.+ . . . 597 11. „ longicornis (Say) . . . 54 i 
{ E 12. ollieifera (Stimps.) . . 550 
3.Gen. Orchestoidea Nie. . . 527 ige P 
. O. tuberculata Nie. . . . 527 eg ; 


14. „ telluris (Bate) . . . . 551 L 

15. „ gracilis (Dana). . . . 551 7 

. „ Pugettensis (Dana) . . 529 16. „ spinipalma (Dane) . . er 
. „ brasiliensis (Dana) . . 529 17. „ brito Stebb. eh Sa. 

18. „ novaehollandiae Stebb.. 553 4 

4.Gen. Orchestia Leach . .580, 735 19. „ martensii (M. Weber) . 553 
. 0. mediterranea A. Costa . 531 „ africana Bate. '. . . . 554 { 
. „ gammarellus (Pall.). . 582 „ C00KE ilk. 3 re 90 
. „ Chevreuxi Guerne . . . 533 6.Gen.Ceina Della Valle. . . 554 
.„ montagui Aud.. . . . 533 | ° 1.(, egregia (Chilton) . . . 554 


1 
2 
3 
4 
| n „ tucurauna Fr. Müll. . . 534 | 7,Gen.Chiltonia Stebb. . .555, 785 | 
7 
8 
9 


4 

2. „ fischeri M.-E). . . . 528 
3. „ ealiforniana (F. Brandt) 528 
4 
5 


nn ee En IRRE Er 1. C. mihiwaka (Chilton) . . 555 
.„ as nn ie ONE sr: 2. „ australis (Sayce) . . . 735 
Sorh. PORERAAMN DER: > 2.4 80 3. „ subtenuis Saycee . . . 785 


. „ guernei Chevreux . .„ . 5836 \ 
10. „ marmorata (Hasw) . . 536 8.Gen.Parhyale Stebb. . . . 556 
1. P. fascigera Stebb. . . . 556 


* 
a Zn 1 A u a ine 


11. „ capensis Dana . . . .„ 587 

12. „ chiliensis M.-E.. . . . 537 | 9.Gen.Neobule Hasw. . . . 556 
13. „ dentata Filh.. . . . „587 1.N. gaimardii (M.-E) . . . 556 | 
14. „ selkirki Stebb. . . . . 588 „ armorica (M.-E) . . . 557 
15. „ pickeringii Dana . . . 588 „ reynaudii (M.-E.) . . . 557 \ 
16. „ nitida Dana . » . . . 539 | 10.Gen.Parorchestia Stebb. . 557 - 
17. „ humicola Marts. . . . 5839 1. P. tenuis (Dana). . . . . 557 2 
18. „ floresiana M. Weber . . 539 2. „ hawaiensis (Dana). .558, 735 E 
19. „ grillus (Bose). . . . . 540 3. „ sylvicola (Dana) . . . 558 ; 
20. „ platensis Kroyer . . . 540 | 11.Gen.Hyale H. Rathke . .559,735 } 


21. „ sulensoni Stebb. . . . 541 
22. „ parvispinosa M. Weber. 541 


23. „ montana M. Weber . . 542 . „ campbellica (Filh) . . 562 


24. „ anomala Chevreux . . .785 . „ diplodactyla Stebb. . . 562 


1.H. earinata (Bate) . . . . 561 
2 
3 
4 
25. „ excavata Chevreux . . 7855 5. „ galateae Stebb.. . . . 563 
6 
7 
8 
9 


. „ ochotensis (F. Brandt) . 561 


beaueoudraii (M.-E.). . 542 


al a al un nun nn m 


” ki . „ maroubrae Stebb.. . . 563 
„ 60n8 nn A. Costa . . 542 . „ graminea (Dana) . 564 2 
7 TEEN Ri von RR . „ hirtipalma (Dana). . . 564 
” Rh gr ne : en Fe macrodactyla Stebb. 564, 736 3 
iin ende 10. „ aquilina (A. Costa) . . 565 4 
„ rectimana Dana . . . 543 11. „ prevostii (M.-E.) . .565,736 ° 7 
5.Gen. Talorchestia Dana . . 543 12. „ grandicornis (Kroyer) . 566 L 
1. T. seutigerula (Dana) . . 544 13. „ novaezealandiae (G. M. 
2. „ darwinii (Fr. Müll.) . . 545 PROBE 20 0 
7 . Bere (Aud.) . . 545,735 . . grimaldii en 567, 736 
. „ tridentata Stebb. . . . 546 . „ erassicornis (Hasw.).. . 568 
” ” s 
5. „ pravidactyla Hasw. . . 546 16. „ pontica H. Rathke. . . 568 
6. „ limicola Hasw. . . . . 547 17. „ media (Dana) . . . . 569 
7. „ quoyana (M.-E) . . . 547 18. „ perieri (H. Luce.) . . . 570 
8. „ quadrimana (Dana) . . 548 19. „ camptonyx (Heller) 570, 736 
9; „ diemenensis Hasw. . . 548 20. „ schmidtii (Heller). . . 571 


a u na am 3 nn u nn nn u alu 


a H. nigra (Hasw.) 


” 


nn Me = Ze Senn- iur. Kan Dan mer - Do, Wi Fun Bu? 


rubra (G. M. Thoms.). 
chiltoni G. M. Thoms. 
brevipes Chevreux. . 
babirussa (A. Costa) . . 
buechichi (Heller) . 
gazella (A. Costa) . 
georgiana (Pfeff.) . 
gracilis (Dana) . 


'hawaiensis (Dana). 


helleri (Grube) . 
nudicornis (Heller) 
orientalis (Dana) 
piedmontensis (Bate) 
pugettensis (Dana) 
rudis (Helle) .. . . 
rupicola (Hasw.) - 
seminuda (Stimps) . . 
stebbingi Chevreux .574, 
stewarti (Filh.) . 
stolzmani Wrzesn.. 
tenella (A. Costa) . . . 
villosa S. I. Sm. 

Sp., (Hasw.) 


.Hyalella S. I. Sm. .574, 
. azteca (Sauss.) ; 


echinus (Faxon). 
longipes (Faxon) 
lucifugax (Faxon) . 
latimana (Faxon) . 
longipalma (Faxon) . 
armata (Faxon) . 
longistila (Faxon) . 
cuprea (Faxon) . 
inermis 8. I. Sm. . 
jelskii (Wrzesn.). . » . 
dybowskii (Wrzesn.) . 
lubomirskii (Wrzesn.) 
meinerti Stebb. . 
warmingi Stebb. 
richardi Chevreux . 4 
neveu-lemairei Chevreux 
pernix (Moreira) 


.Allorchestes Dana . 
. novizealandiae Dana. 


compressus Dana . 
malleolus Stebb. 
plumicornis (Heller) . 
humilis Dana 
angustus Dana . 
brevicornis Dana . 


571 
572 
735 
735 
572 
572 
572 
572 
572 
573 
573 
573 
573 
573 
573 
573 
573 
574 
736 
574 
574 
574 
574 
574 


736 
575 
576 
576 
576 
577 
577 
577 
577 
578 
578 
578 
579 
579 
579 


580 , 


736 
736 
736 
58l 
581 
58l 
582 
583 
584 
584 
584 


page 

A. istricus (Grube) . 584 

„ Japonicus Stimps. . 584 

„ littoralis Stimps . .585, 736 

„ patagonicusR.O. Cunningh. 585 

„ paulensis Heller 585 

„ penicillatus Stimps. 585 

„ Plumulosus Stimps. 585 

„ rubricornis Stimps. 585 
SWIE RUE: 5 585 

„ Stylifer Grube . . . „ 585 

„ Sp Heller . 585 
33. Fam. Aoridae. . . . .585, 736 
1.Gen. Aoroides A. Walker. 586 
1. A. columbiae A. Walker 586 
2.Gen.Aora Kroyer. 587 
1. A. typica Kroyer . 587 
3.Gen.Mierodeutopus A. Costa 588 
1.M. chelifer (Bate) 589 
2. „ armatus Chevreux . 589 
3. „ gryllotalpa A. Costa. . 590 
4. „ stationis Della Valle . 590 
5. „ haswelli Stebb. . 591 
6. „ anomalus (H. Rathke) 591 
7. „ propinquus O. Sars 592 
8. „ megnae Giles 2 DIR 
9, „ versiculatus (Bate) .598, 736 
10. „ damnoniensis (Bate) 593, 736 
„ titii Heller . . +59 
4.Gen.Lembos Bate . . .59, 737 
1. L. longidigitans (Bonnier). 595 
2. „ arcticus (H. J. Hansen) . 595 
3. „ Spiniventris (Della Valle) 593 
4. „ hirsutipes Stebb. 596 
5. „ megacheir (O. Sars) 596 _ 
6. „ longipes (Lilj.) . 597 
7. „ pbilacanthus (Stebb.) 598 
8. „ kergueleni (Stebb.) 598 
9. „ websterii Bate 799 
10, „ smithi.(S. J. Holmes) 737 
11. „ podoceroides A. Walker 737 
12. „ chelatus A. Walker 737 
„ fuegiensis (Dana) . 600 

„ tenuis (Dana) 600 
5.Gen.Lemboides Stebb. 600 
1. L. afer Stebb. 600 
2. „ australis (Hasw.) 601 
6.Gen. Dryopoides Stebb. . 601 
1. D. westwoodi Stebb. . 601 


AXXV 


III* 


XxXVI Systematie Index 


page { page 
7.Gen. Paradryope Stebb. . . 602 6.Gen. Megamphopus Norm... 621 
1. P. orguion Stebb. . . . . 602 1. M. cornutus Norm.. . . . 621 
8.Gen.Coremapus Norm. . . 736 7.Gen.G@oösia Boeck . . .. 62 
1. C. versiculatus (Bate) . . 736 1. G. depressa (Goös). . . . 622 


8.Gen. Protomedeia Kroyer 623, 738 
1. P. faseiata Kroyer. . . . 638: 


34. Fam. Photidae . . . .603, 737 2. „ grandimana Brüggen . 738 
1.Gen. Microprotopus Norm. 604 9.Gen.Xenocheira Hasw. . . 64 
1.M. maculatus Norm. . . . 604 1. X. fasciata Hasw. . ... . 624 

2. „ longimanus Chevreux . 605 10. Gen.Leptocheirus Zadd. . 625 

„ emissitius (Dana) . . . 605 L. cornuaurei Sowinski . . 626 

„ hirsuticornis (Dana) . . 605 „ aberrans (Ohlin) . . . 626 

„ minutus Sowinski . . . 605 „ Pinguıs (Stimps.) . .627, 738 
2.Gen.Photis Kreyer . . .605, 738 hirsutimanus (Bate) . . 627 


„ dellavallei Stebb.. . . 628 


EEE 


1. P. brevicaudata Stebb. .. . 606 ; % 
2. „ reinhardi Kroeyer . . . 607 Dr 
3. „ macrocarpa. Stebb. . . 607 Eon SERBMERE. (Grabe) 2 >) um 
4 r longicaudata (Bate R „ trieristatus (Chevreux) . 629 
ar Westw) 608 „ pilosus Zadd.. . . . 630 
Ta gr 11.Gen. Cheiriphotis A. Walker 737 | 
5. „ tenuicornis O. Sie 2, 2608 - 
2 1. ©. megacheles (Giles) -. . 787 
6. „ longimana A. Walker . 738 


12.Gen. Audulla Chevreux . . 737 


® un z kai en. 2 1. A. chelifera Chevreux . . 737 
RB ERDE) 2120 0 AND 13.Gen. Bonnierella Chevreux . 737 
3.Gen. Haplocheira Hasw.. . 609 1. B. abyssi (Chevreux) . . . 737 
1. H. barbimana (G.M. Thoms.) 609 9, i abyssorum (Bonnier) N 
4.Gen. Eurystheus Bate. .610,738 | 14.Gen.Chevalia A. Walker. . 737 
1. E. atlantieus (Stebb.). . . 611 1. C. avieulae A. Walker . . 737 
2. „ afer (Stebb.) -i« ... . 612 _— 
3. „ thompsoni (A. Walker) . 612 | 35. Fam. Isaeidae. . . . . . 630 
4. „ crassipes (Hasw.) . . . 612 1.Gen.Isaea M.-E. . . . . . 630 
5. „ thomsoni (Stebb.) . . . 618 1. L montagui M.-E. . . . 630 
6. „ ostroumowi (Sowinski) . 614 Be : 
7. „ exsertipes (Stebb.). . . 614 | 36. Fam. Ampithoidae.. . . 631 
8. „ hirsutus Giles . . „615, 737 1.Gen. Ampithoe Leach . .631, 738 
9. „ dentifer (Hasw) . . . 615 1. A. megaloprotopus (Stebb.) 633 
10. „ longimanus (Chilton) . 616 2. „ lacertosa (Bat). . . . 688 
11. „ palmatus (Stebb. &D. 3. „'cinerea (Hasw.). - . 634 
Roberts)... . 616 4. „ longimana (8. I. Sm.) 634, 738 
12. „ chiltoni (G..M. Thoma). 617 5. „ quadrimana (Hasw.). . 635 
13. „ maculatus (Johnst.) . . 617 6. „ valida (8. I. Sm.) . .685, 738 
14. „ dentatus (Cheyreux) . .. 738 7. „ mitsukurii (Della Valle). 635 
18. tenuicornis (S.J. Holmes) 738 8. „ flindersi (Stebb) . . . 685 
16. „ zeylanicus (A. Walker) . 738 9. „ humeralis (Stimps) . . 636 
17. „ gardineri (A. Walker) . 738 10. „ femorata (Kroyer). . . 636 
5.Gen. Podoceropsis Boeck . 618 11. „ brevipes Dana). . . . 687 
1. P. abyssi Chevreux . .619, 787 12. „ brasiliensis (Dana) . . 687 
2. „ kermadeei Stebb. . . . 619 ‚13. „ kergueleni (Stebb.) . . 638 
3. „ lindahlii H. J. Hansen . 619 14. „ japonica (Stebb.) . . . 638 
4. „ sophia Boeck. . . . . 620 15. „ vaillantii (H. Luce) . . 639 
5. „ nitida (Stimps.) . . . 620 16. „ rubrieata (Mont) . . . 639 


A. Seott . 


17. A. inda (M.-E.) 
18. „ alluaudi (Chevreux) 
19. „ intermedia (A. Walker) . 

„ australiensis (Bate) 

' „ brusinae (Heller) 

„ chilensis (Nie.) . 

„ filieornis (Dana). 

„ fillgera (Stimps). 

„ filosa (Sav.) : 

„ maculata (Stimps.) 

„ orientalis (Dana) 

„ pausilipae (M.-E.) . 

„ punctata Say. 

„ ramondi (Aud.). 

„ Stimpsoni (Boeck) . 

„ tongensis (Dana) 

„ SP., (Bate & Westw.) . 
2.Gen. Pleonexes Bate 
1. P. gammaroides Bate 
2. „ feroX Chevreux . 

„ dubius (R. Templ.) 

„ validus (Czern.). 

„ Virescens (Stimps.) 
3.Gen. Grubia Üzern. 
1. G. erassicornis (A. Costa) . 
2. „ hirsuta Chevreux } 
3. „ microphthalma ne 
4. „ longieornis A. Walker & 


5. „ compta (S.L Si 
„ setosa (Hasw.) . ı 
4.Gen. Amphithoides an 
1. A. longicornis Kossm. 
'„ eomptus (8. I. Sm.) .645, 
2. Gen. Paragrubia Chevreux 
1. P. vorax Chevreux . $ 
5.Gen.Sunamphitoe Bate . 
1. S. pelagica (M.-E.) 
6.Gen. Biancolina Della Valle. 
1. B. euniculus (Stebb.) . 


37. Fam. Jassidae. 
1.Gen. Wyvillea Hasw. 
1.W.longimana Hasw. . . 
2. „ haswelli (G. M. Thoms.) 
'2.Gen. Parajassa Stebb. . 
1. P. pelagica (Leach) 
2. „ tristanensis (Stebb.) . 
3.Gen. Microjassa Stebb. 
1. M. eumbrensis (Stebb. & 
D. Roberts.) 


page |; 


640 
738 
138 
641 
641 
641 
641 
641 
641 
641 
641 
641 
642 
642 
642 
642 
642 
738 
642 
738 
643 
643 
643 


, 739 


644 
738 
738 


738 
739 


644 ° 


‚645 
645 
739 
739 
739 
645 
739 
646 
647 


647 
648 
648 
648 
649 
649 
650 
651 


651 


Systematie Index 


XXXVL 

page 

4.Gen.Jassa Leach. . . . 652,739 
1. J. dentex (Czern.) . 658 
2. „ falcatiformis (Sowinski). 653 
3. „ Ingens (Pfeff.) . 653 
4. „ pulchella Leach . .654, 739 
5. „ pusilla (0.Sars) . .655, 739 
6. „ ocius (Bate) . ... .655, 739 
7. „ frequens (Chilton). . . 656 
8. „ goniamera A. Walker 739 
9. „ marmorata S. J. Holmes‘ 739 
„ ealifornica (Boeck) 656 

„ falecata (Mont.) 656 

„ orientalis (Dana) 657 

„ ornata (Miers) . . . 657 
5.Gen.Ischyrocerus Kröyer 657, 739 
1. I. nanoides (H. J. Hansen) 657 
2. „ anguipes Kröyer 658 
3. „ megacheir (Boeck) 659 
4. „ assimilis (O. Sars) . 659 
5. „ latipes Kroyer 660 
6. „ megalops O. Sars 660 
7. „ tenuicornis (O. Sars) . 660 
8. „ brevicornis (O. Sars) 661 
9. „ tubereulatus (Hoek) 661 
10. „ commensalis Chevreux . 739 
„ monodon (Heller) . 662 

38. Fam. Corophiidae . 662, 739 
1.Gen. Concholestes Giles . 663 
1. C. dentalii Giles. 663 
2.Gen. Paracorophium Stebb. 663 
1. P. excavatum (G.M. Thoms.) 664 
3.Gen. Camacho Stebb. 664 
1. C. bathyplous Stebb. . 665 
4.Gen.Cerapus Say . . .665, 740 
1. C. erassicornis (Bate). 666 
2. „ sismithi Stebb. . 666 
3. „ tubularis Say . . .667, 740 
4. „ flindersi Stebb... . .668, 740 
5. „ abditus R. Templ.. .. 668 
6. „ ealamicola (Giles) . .669, 740 
5, Gen; Chevreuxius Bonnier . 669 
1. C. grandimanus Bonnier 670 
6.Gen. Eriethonius M.-E. .670, 740 
1. E. brasiliensis (Dana) .671, 740 
2. „ pugnax (Dana) . 672 
3. „ macrodactylus (Dana) 672, 740 
4. „ difformis M.-E. . 672 
5. „ hunteri (Bate) . . .673, 740 
6. „ megalops (0. Sars) 673 


XXXVIHI Systematie Index 
f page : . page 
7. E. rubrieomis (Stimps.). . 740 | 12.Gen. Grandidierella Coutiere 739 
„ fasciatus (Stimps.). 674 1. G. mahafalensis Coutiere . 739 
„ peculans (Dana) 674 
„Sp, Dana... .... 674 | 39. Fam. Cheluridae . . . . 693 
7.Gen. Cerapopsis Della Vallle 674 1.Gen. Chelura Phil. er RD 
1. C. longipes Della Valle „ . 674 1. C. terebrans Phil. . 693 . 
8.Gen. Neohela S. I. Sm. 675 | 40, Fam. Podoceridae . 694 
1. N. monstrosa (Boeck) 675 1.Gen. Laetmatophilus Bruz. 695 
2. „ phasma S. I. Sm. . 676 1. L. purus Stebb. . . . 696 
9.Gen. Unciola Say. 676 2. „ tuberculatus Bruz. 696 
1. U. laticornis H. J. Hansen 677 3. armatus (Norm.) 2... 697 
2. „ leucopis (Kroyer) . 678 4. „ hystrix (Hasw.) . 697 
3. „ Irrorata Say . . 678 2.Gen.Cyrtophium Dana 697 
4. „ crassipes H. J. Hansen . 679 1. C, orientale Dana 698 
5. „ planipes Norm... . . . 679 2. „ minutum Hasw.. 698 
6. „ erenatipalma (Bate) . . 680 „ laeve Heller . 698 
7. „ petalocera (0. Sars) . . 681 3.Gen. Leipsuropus Stebb. 698 
8. „ incerta Bonnier. 681° 1. L. parasiticus (Hasw.) 699 
10.Gen. SiphonoecetesKroyer 681,740 4.Gen.Xenodice Bocck . . . 699 
1:8, typleis- Kopien. a 1. X. frauenfeldti Boeck 700 
9 allidus O. Sars Bon 5. Gen. Podocerus Leach .700, 741 
al EaRN. 2: s f 1. P. cheloniae (Stebb.). . . 701 
3. „ eolletti Boeck . 683, 740 9 d NE 
4 dellavallei Stebb. . 684 N NN ee) re 
5. n ® 3. „ Inconspicuus (Stebb.) 702 
. „ sabatieri Rouv. . . . 684 RER i 
Ä : x obatus (Hasw.) . 708 
6. „ orientalis A. Walker. . 740 RE hil 
7° „ smithianus Rathbun . 740 er ER LISE NE 
” Y 
kröyeranus (Bate) 684 aSRen Bere Ense 
R > 6. „ variegatus Leach . 703 
11.Gen. Corophium Latr.. .685, 740 7. „ brasiliensis (Dana) 704 
1. C. volutator (Pall.). 686 | 8. „ laevis (Hasw.) .704, 741 
2. „ nobile O.Sars . . . 687 9. „ danae (Stebb.) . 705 
3. „ chelicorne O. Sars 687 10. „ eristatus (G. M. Thoms.) 706 
4. „ spinulosum O. Sars 688 11. „ synaptochir (A. Walker) 741 
5. „ affine Bruz. Aa 688 12. „ zeylanieus (A. Walker) . 741 
6. „ runcicorne Della Valle . 689 6.Gen.Icilius Dana . ; 706 
7. „ robustum O. Iars 689 1. I. ovalis Dana 707 
8. „ mucronatum ©. Sars 689 7.Gen. Dulichia Kroyer . 708 
9. „ curvispinum 0. Sars . . 690 1. D. spinosissima Kroyer . 709 
10. „ monodon .O. Sarz . 690 2. „ monacantha Metzg. 710 
11. „ crassicorne Bruz. . 690 3. „ aretica J. Murdoch 710 
12. „ bonellii (M.-E). 691 4. „ macera O0. Sars . 710 
13. „ maeoticum Sowinski . 740 5. „ hirticornis O. Sars zı1 
14. „ triaenonyx Stebb. . 740 6. „ normani O. Sars zı 
„ acherusicum A. Costa 692, 740 7. „ nordlandica Boeck zı1 
„ eontraetum Stimps. . 692 8. „ falcata (Bate) 712 
„ eylindrieum (Say). .692, 740 9. „ porrecta (Bate) . 712 
„ dentatum Fr. Müll. 692 10. „ tuberculata Boeck. 713 
„ quadriceps Dana 692 8.Gen. Paradulichia Boeck 713 
„ salmonis Stimps. 692 1. P. typica Boeck . 714 
„ Spinicorne Stimps. 692 


psis O. Sars 714, 741 


Ka: PER Be FRE 
a In a Bl la in Se ET ad Bu ee 
? f 


al Bl he Ze ua Me en 


ri ne a 2 
ERPAEIT 


Amphipoda 


1775 Gen. Gammarus (part.) + Gen, Oniscus (part.), J. C. Fabrieius, Syst. Ent., 
p- 418, 296 | 1798 Subgen. Gammarellus (part.), J. F.W. Herbst, Naturg. Krabben 
Krebse, v.2 p.106 | 1802 Fam. Gammarinae (ex Ord. Branchiogastra), Latreille, Hist. 
Crust. Ins., v.3 p.38 | 1813/14 Trib. Gasteruri (part.), Leach in: Edinb. Ene., v.7 p.386 | 
1815 Leg. Edriophthalma (part.), Leach in: Tr. Linn. Soc. London, v.11 p.307, 352 | 
1816 & 17 Ord. Amphipoda, Latreille in: Nouv. Dict., ed.2 v.1 p.467; v.8 p.493 | 1888 
Subord. A., T. Stebbing in: Rep. Voy. Challenger, v.29 p.601 | 1890 A., G.O. Sars, 
Crust. Norway, v.1 p.3. 


Head carrying 2 pairs of antennae, the mandibles, 2 pairs 
of maxillae, and the basally coalesced maxillipeds. Cornea of 
eyes not divided into facets. Peraeon consisting usually of 7 seg- 
ments, each bearing a pair of legs; first segment sometimes fused 
with head. Pleon consisting normally of 6 segments and the telson, 
or rudimentary; if normal, bearing 6 pairs of legs, the first three 
of which, funetioning as swimming organs, differ in structure 
from the rest. Organs of respiration (branchial vesicles) attached 
to the peraeon, not to the pleon. Heart (in a pericardiac sinus) 
neverexceedinghinderlimit of peraeon, with aorta also at posterior 
extremity. Antennal gland present, though sometimes small. 

The body, often compressed, sometimes depressed, or piriform, or even 
rodlike, consists of head, peraeon and pleon. The number of its free 
segments reaches 15 (head 1, peraeon 7, pleon 7). First segment of peraeon 
sometimes coalesced with head, rarely with 24 segment of peraeon; fusion 
of the last 2 segments of peraeon occurs. Pleon often as long as peraeon, 
or even rather longer; the limits between the hinder segments occasionally 
disappear; in the Caprellidea the pleon is rudimentary. The last pleon segment 
is the telson. 

Appendages of head: 1) First antenna; peduncle of 3 (rarely 
fewer) joints, with a many-jointed primary flagellum and usually a shorter 
accessory flagellum. 2) Second antenna; peduncle of 5 joints, with one 
flagellum; the first 2 joints of peduncle are short and not always distinct; 
the 24 usually with a conical process (gland-cone) for the opening of the 
antennal gland. The length of antenna 1 and 2, in proportion to each other 
and to the body varies within wide limits. 3) Mandible (Fig. 7,8 p. 30, 32); 
basal joint provided with masticatory structures; palp with 3 or fewer joints, 
or absent. Between the mandibles the upper lip, attached to the epistome, 
and the lower lip frame the entrance to the oesophagus. 4) First 
maxilla (Fig. 78 p. 333) consisting of 5 joints; the palp, that is the 4th 
and 5tk joints, not rarely wanting. 5) Second maxilla (Fig. 88 p. 476) 
consisting of 3 joints. In maxilla 1 and maxilla 2 the 24 joint is indistinet, 

Das Tierreich. 21. Lief.: T.R.R. Stebbing, Amphipoda I. ı 


Eye, x 
Head, \ ER, IT TER RR 
De % „Antenna 2 nn \ 
Fe Mandible RR 
Aorta anterior. r ENT: - Ma “77 od ....Gnalhopod 1 Flage he 
—S) Jeraeon Segmentl. EN /g & Fi * S age 
3 / al $ GA 2 1... alm 
S Heart-- ZN x j 


DS RER Peraeonod 1 
Ds EN Tun GE -- Peraeonod 2 


nam Ss 


Telson-‘; 


Pleon Segment 6-° N 


Fig. 1. Scheme of a male of the legion Gammaridea. 


Amphipoda Bi | 


and the 1° and 39 are each expanded to a plate, provided with denticles 
and spines. 6) Maxilliped (Fig. 49 p. 186) 7-jointed; first joint, sometimes 
also the 24, of the one maxilliped fused with that of the other maxilliped; 
4th _7th joints forming the palp; 1 or 2 or 3 joints of.the palp sometimes 
wanting; articulation still more reduced in the Hyperiidea. 

Each segment of peraeon commonly carries one pair of legs. The 
7 legs of peraeon are divided into 2 groups: the 1°t—4!b leg, and the 
5th—_7th Jeg; the former forming an angle open to the front, the latter 
to the rear; the 34 joint in all of them acts as the knee of the angle. 
The first 2 legs are called gnathopods (not so much on account of their 
own function, as from their homology with the 2% and 34 maxillipeds of 
Decapoda); so legs of peraeon are: 2 gnathopods and 5 peraeopods. 
- All are uniramous; the normal number of joints is 7. The first joint, greatly 
enlarged (or perhaps soldered) to the so-called epimera or side-plates in 
the Gammaridea, is liable to evanescence in the Hyperiidea, and wanting 
in the Caprellidea; the last joints of gnathopod 1 and 2 usually, of other 
peraeopods very rarely (except in some genera of Hyperiidea), form a grasping 
organ. (lose at the base of gnathopod 2 and of the peraeopods there are 
the branchial vesieles, 2—6 on each side. 

The legs of the first 3 segments of pleon are called pleopods, those 
of the 46th segments uropods. The pleopods consist of a basal joint 
and almost always 2 many-jointed, often flagelliform rami, beset with swimming- 
setae; the basal joints of each pair of pleopods are often coupled by hooked 
spines (Fig. 120 p. 696). The rami of the uropods are sometimes 2-, usually 
1-jointed; they usually bear spines, which are sometimes uneinate. 

External sexual characters are found especially in antenna 1 and 2, 
in the grasping hands of gnathopods and peraeopods, and in the marsupial 
plates of 0. The ducts of ovaries open in the 5t", those of testes in the 
7th segment of peraeon; no proper copulatory organs observed. 

Among the anatomical characters especially of value for classification are 

the number, form and structure of the paired eyes, the number of the long 
midgut-glands (hepato-pancreatic tubes) flanking the intestinal canal, and 
of the so-called rectal glands; also the number of the venose ostia of 
the heart and of the un-fused ganglia of the ventral nerve-chain. 

The eggs are laid in the marsupium, formed by the marsupial plates; 
the young, when hatching, resemble the adult; only in the Hyperiidea some- 
times pleon and pleopods are at first scarcely developed. 


The great majority of the Amphipoda are marine; only among the Gammaridea 
are there species living in fresh or brackish water, or near the sea above highwater- 
mark, or even, though exceptionally, far from water in damp places. The Gammaridea 
. and Caprellidea are extensively litoral, the Hyperiidea pelagie; also in each legion 
there are species living on swimming animals or floating objeets. The geographical 
distribution is cosmopolitan, ascertained to within less than 600 km of the north 
pole, to a depth of 58310 m in the ocean, and in fresh water to a height of 4054 m 
above sea-level. 

Their diet is chiefly of animal substances. Some Gammaridea eonstruct dwelling 
tubes, some live in grooves and hollows, which they burrow in ascidians, sponges or 
wood. The species, living on or in coelenterata, sponges, tunicates, mollusca, are 
perhaps commensals, but at least sometimes feed on the body of their host, sometimes, 
as Phronima, unite feeding with housebuilding. True parasites are the Cyamidae. 
Parasites of the Amphipoda are Gregarinida, Trematoda and Üopepoda. 

Long before J. C. Fabrieius’ establishment of the Genus Gammarus, Amphipoda 
were described under the generic designations of Cancer, Onisceus, Astacus and Squilla. 


ı* 


= Amphipoda 


P. A. Latreille (1802, Hist. Crust. Ins., v.3 p. 38) was the first who united all 
species known to him of Amphipoda (as at present understood) in one group, the family 
of Gammarinae, to the exelusion of all other species; later (1816, in: Nouv. Diet., ed.2 
v.1 p.467) he devised for the group the name Amphipoda, separating, however, the 
genera Cyamus and Caprella as Laemodipoda. The limits of our order, generally 
accepted to-day, were settled by Kroyer (1843, in: Naturh. Tidsskr., v.4 p.490) and 
J. D. Dana (1852, in: Amer. J. Sei., ser.2 v.14 p.297); from the latter author is 
derived also the division of the Amphipoda into the 3 tribes of Gammaridea, Hyperiidea 
and Caprellidea. Only Gerstaecker (1883 & 86, in: Bronn’s Kl. Ordn., v.5ı1 p. 283, 481) 
regards the Tanaidea as a tribe of Amphipoda. 


Synoptical diagnosis of the three legions: 


Head not fused with 1s6 segment of peraeon. Palp 
ofmaxilliped2-t0o4-jointed. Peraeon with pairs oflegg; 
5 or6segments of peraeon with branchial vesieles; 4 segments 
in @ with marsupial plates; 1st joint of gnathopods 1, 2 
and of peraeopods 1---5 forming or united to well developed 
side-plates. Pleon consisting usually of 7 free seg- 
ments, carrying 3 pairs of pleopods and usually 
8 pairs, atleast 1 pair, of uropods; uropod 1 always 
with 2 rami. Eyes varying in size and form, 0—4 in number. 
Hepato-pancreatie tubes 4, rarely 2; reetal glands 2 or 1, 
sometimes rudimentary. Heart with3 pairs, rarely 1 pair, of 
ostia. Nerve-chain with 4 ganglia in pleon-segments 14 I. Leg. Gammaridea 

Headnotfused with lst segment ofperaeon. Maxilli- 
ped without palp. Peraeon with 7 pairs of legs; 3—5 (6?) 
segments of peraeon with branchial vesieles; 4segments in 
with marsupial plates; 1st joint of gnathopods 1, 2 and of 
peraeopods 1—5 small or wanting. Pleon consisting / 
usuallyof7 free segments, with3pairs len 
and3pairsofuropods’'rami of uropods often evanescent. 
Eyes usually of large size. Hepato-pancreatie tubes 2 or 
none; rectal glands none. Heart with 2, rarely 3, pairs of 
ostia. Nerve-chain with 3 or 4 ganglia in the anterior 

BRAEORES 08 DIBOR Sy ae leer Fa lern II. Leg. Hyperiidea 
Head fused with 1st segment of peraeon. Palp of 

maxilliped I- to 4jointed. Peraeon often with fewer 

than 7 pairs of legs; 2, rarely 3, segments of peraeon with 

branchial vesieles; 2 segments in @ with marsupial plates; 

1st joint of gnathopods and peraeopods wanting. Pleon 

and itslegsrudimentary. Eyes small,1 pair. Hepato- 

pancreatic tubes 2; rectal glands none. Heart with 3 pairs‘ 

of ostia. Posterior ganglia of nerve-chain very small, none 

almatedin pleop 3... 2 ur. me An Ran N III. Leg. Caprellidea 


SE I © 


an a re ir a a 


ET le 


ah > Au. ie un ul un non 410 


I. Leg. Gammaridea 


1852 Subtrib. Gammaridea, J. D. Dana in: Amer. J. Sei., ser.2 v.14 p.308 | 
1853 Subtrib. @., J. D. Dana in: U. S. expl. Exp.. v. 1311 p. 806, 825 | 1861 Trib. 


\ 


. Prostomatae + Gammaridae, A. Boeck in: Forh. Skand. Naturf., Mode 8 p. 637, 639 | 


1888 Trib. Amphipoda Gammarina, T. Stebbing in: Rep. Voy. Challenger, v.29 p.601 | 
1890 Trib. Gaämmaridea, G. O.Sars, Crust. Norway, v.1 p.21 | 1893 Subord. Gammarini, 
A. Della Valle in: F. Fl. Neapel, v.20 p. 297. 


Head not fused with 1° peraeon segment. Eyes usually compound, 
even when externally simple, but sometimes reduced to mere pigment patches 
or entirely absent; normal number 2, varying to 1, 3, 4 or 6 (p. 104); the 
cornea of each eye sometimes forming a lens*). Antennal consisting of 3-jointed 


E- peduncle and flagellum, with or without accessory flagellum. Antenna 


2 longer or shorter than antenna 1 or equal to it; peduncle apparently 
5-jointed, usually with conical process (gland-cone) opening on 2% Joint. 
The joints of one or both antennae in J, or in d and O, sometimes carrying 
membranaceous appendages (calceoli, Fig.82 p.347). Epistome flat or projecting. 
Upper lip with distal margin of outer plate smooth or variously bilobed 
(Fig. 41 p.163). Lower lip divided into 2 prineipal lobes, prolonged backward 
into the so-called mandibular processes, and often having between them 2 
smaller inner lobes (Fig. 71 p. 278, Fig. 102 p. 598). Mandible (Fig. 77 
p. 333) normally composed of basal joint and 3-jointed palp; the basal joint 
produced to a dentate cutting edge with adjacent accessory plate on inner 
side and armed with a spine-row between the cutting-plates and the molar, 
which is a prominent denticulate tuberele; each one of the features some- 
times degraded or absent (Fig.2 p.12, Fig.21 p.96). Maxillal, 1° and-34 joints 
with expansion (inner and outer plate), surmounted by spines, which are usually 
furcate or serrate; 4" and 5b joints forming the so-called palp (Fig. 78 p. 333, 
Fig. 87 p. 476); the parts, especially inner plate and palp, liable to evanescence. 
Maxilla 2, 18° and 34 joints with expansion (inner and outer plate); the 
plates very variable in relative size, rarely wanting, usually in part 
fringed with setae or slender spines (Fig. 88 p. 476). Maxillipeds (Fig. 49 
p. 186, Fig. 54 p. 208), 24 and 34 joints usually with expansion (inner 
and outer plate); palp 2—4-jointed. Peraeon of 7 distinet segments, rarely 
reduced to 6 by coalescence of the last two. Legs of the peraeon overlapped 
at base by the side-plates, developed from or soldered to the 1° joints 
of the legs; the first 4 side-plates usually larger than the 3 following, the 
4! commonly the largest, but with many exceptions. Gnathopods 1 and 2 have 
the 4tk joint not end to end with the 5t%, but more or less underpropping it, 
and the 6! joint generally more or less expanded to form the so-called hand. 
The branchial vesicles, usually attached to gnathopod 2 and peraeopods 1—4 
or 1—5, are simple, twisted, pleated or divided into leaf-like lobes; simple 
accessory vesicles rare. In the O peraeon segments 2—5 are furnished at the 


*) Articulated eye-lobes without visual elements attributed to Ingolfiella Hansen 


1903 (see p. 726). 


6 Gammaridea 


proper age with marsupial plates, fringed with simple setaee The pleon 
segments 1—3 are always distinct; the pleopods are almost always biramous; 
the peduncles often connected by coupling-spines (Fig. 14 p. 83); therami usually 
tapering, many-jointed, each joint with a pair of plumose setae; the 1° joint of 
inner ramus often having on its inner margin spines cleft at the apex. Pleon 
segments 4—6 are usually distinet; outer ramus of the uropods sometimes 

2-jointed; uropod 1 never absent, and always biramous; of uropods 2 and 3 
rarely one or both obsolete, or without one or both of the rami. Telson 
(probably) never absent, sometimes divided to the base, sometimes not divided 
at all, and exhibiting every intermediate gradation. 

Distribution see above pag. 3. 


41 Families, 304 accepted and 9 doubtful genera, 1076 accepted species 
and 257 doubitful. 


Synopsis of the families:*) 


Antenna 1 (Fig. 3, 6, 9, 12), 1st joint stout**), 
with accessory flagellum; mandible 
(Fig.7,8), eutting edge almost smooth***), 


with palp; gnathopod 2 (Fig. 10, 11), z 
sr 


’ gar TamE Biongetei sa. a a 1. Fam. Lysianassidae . . p. 
These characters not eombined — 2. 
Body (Fig. 18) plump; antenna 1 (Fig. 19) 
F: with accessory flagellum; mandible 
2 (Fig. 17, 21) without molar, without 
a a ET ER 2. Fam. Stegocephalidae . p. 
These characters not combined — 3. 
Head (Fig. 25) tapering, truncate; eyes, when 
| present, externally simple, usually 4; 
3 antenna 1 without accessory flagellum; 
L; These characters not combined — 4. 
Antenna 1 (Fig 30—32) with accessory 
flagellum; mandible with palp normal; 
peraeopods 3—5 (Fig. 35—38) adapted 
for burrowing by expansion of joints and 
| armature of spines and setae — 5. 
These characters not combined — 6. 


eg Peraeopod 4 not greatly BE than peraeo- 


4 


DO BI Nr Re en 4. Fam. Haustoriidae . . p.118 
a Peraeopod 4 greatly longer than peraeopod5 5. Fam. Phoxocephalidae . p. 133 I A & 


3 (Fig. 39) biramous; telson elongate, 
tapering, enge. - - ... 2.2.0. 6. Fam. Amphilochidae. . p. 148 
These characters not combined — 7. 
Antenna 1 without accessory flagellum; 
- | maxillipeds (Fig. 44, 49, 51, 54) more or 
less abnormal; telson entire — 8, 
These characters not combined — 16. 
[ Gnathopod 1 (Fig. 42) chelate — 9. 
Gnathopod 1 (Fig. 45) not chelate — 10. 


Upper ip ineised ; maxillipeds normal; uropod 
; | 


*) For some of the imperfections in this synopsis the reader is invited to believe 
that a more or less adequate apology could be offered, were space available for its 
presentment. 

**) Except in Amaryllis (Fig. 5 p. 23). 
***) Except in Valettia and Podoprion; wanting in Kerguelenia (Fig.2 p. 12). 


telson (Fig. 24) more or less eleft. .. 3.Fam. Ampeliseidae . . p. 97 


2 Sy Al u a a u a 


ar An 


un 2 N et 


en .. 


D 


Gammaridea 


Mandible and maxillae 1 and 2 developed 


A Mandible weak, maxillae 1 and 2 obsolete 

10 Uropod 3 not biramous — 11. 
Uropod 3 biramous — 14. 

u Mandible with palp — 12. 
Mandible without palp — 18. 

18 Mandible, 3d joint of palp very short . . 
Mandible, 3d joint of palp not short. 

13 Maxillipeds (Fig. 51) with outer plate obsolete 
Maxillipeds with outer plate developed . 

14 $ Mandible without palp . . ... 2... 
Mandible with palp — 15. 

15 Maxillipeds (Fig. 54) with palp 2-jointed . 


Maxillipeds with palp 4-jointed 
Mandible (Fig. 56, 58, 60) with molar weak 


These characters not eombined — 19. 


or wanting; kelson more or less divided —17. 


&® = 


Maxillipeds (Fig.55), innerplate welldeveloped 16. 


17 
Maxillipeds (Fig. 59), inner plate small — 18. 
Gnathopods 1 and 2 (Fig. 57) simple. 
Gnathopods 1 and 2 strongly subehelate 
Eyes*), when present, usually dorsal con- 
tiguous or confluent (Fig. 61, 62) — 20. 
Eyes*), when present, lateral — 22. - 
Antenna 1 (Fig. 67) without accessory flagel- 
lum; mandible, 3d joint of palp large; 
peraeopod 5 (Fig. 64) much longer than 
peraeopod 4; telson entire 
Antenna 1 (Fig. 70) with accessory flagellum ; 
mandible, 3d joint of palp small; peraeo- 
pod 5 not exceptionally longer than 
peraeopod 4; telson usually eleft**) — 21. 
Peraeopods 1 and 2 with 4th and 5th joints 
N 
Peraeopods 1 and 2 with 4th za 5th joints 
not dilated 
Side-plate 4 (Fig. 84) usually excavate behind; 
peraeopods1 (Fig.91)and2notglandular; 
telson (Fig. 81, 100) variable; animal 
usually not domicolous — 28. 
Side-plate 4 usually not excavate behind; 
peraeopods 1 and 2 frequently glandular; 
telson (Fig. 115, 118) entire; animal 
usually domieolous — 831. 
Mandible (Fig. 77) with palp — 24. 
Mandible (Fig. 90) without palp — 80. 
Telson entire —. 25. 
Telson cleft — 27. 
Telson variable, usually cleft; antenna 1 
usually with accessory flagellum. . . . 


1 


0 


19 


| 
| 
| 
| 
| 
H Mandible without palp 
| 
\ 
| 
| 
| 


= 


1 


37. 
18. 


19. 


20. 


21. 


30. Fam. Gammaridae . 


. Fam. 
. Fam. 


. Fam. 
. Fam. 


. Fam. 
. Fam. 
. Fam. 


. Fam. 
. Fam. 


Fam. 


Fam. 
Fam. 


Fam. 


Fam. 


Fam. 


Leucothoidae 
Anamixidae .. . 


Metopidae ... . 


Cressidae 


Stenothoidae . . . 


Phliantidae 


Colomastigidae. . 


Lafystiidae 


Laphystiopsidae . 


Acanthonotozo- 
matidae 


Pardaliscidae 


Liljeborgiidae . . 


Oedicerotidae . 


Synopiidae. . 


Tironidae 


‚p ?” ME 


- P. 270 


‚pe vr MF 


r 
‚2.30 v MM 


*) In the case of blind species or exceptional genera like Ommatogammarus 
the distinguishing charaeters under 20 and 21 will give assistance, and for the Gam- 
marids of Lake Baikal the locality will be a guide. 


**) Except in Bruzelia (p. 274). 


8 Gammaridea, Lysianassidae 


Rosa WARE. a a 22. Fam. Calliopiidae. . . p.285 
R> stram well marked — 26. 
Side-plates 1—4 rounded; antenna 1 longer 

tan antenne 2... A 23. Fam. Pleustidae. . . . p.309 
Side-plates 1-——4 angular; antenna 1 shorter 


25 


khan antenna 8... er, 24. Fam. Paramphithoidae p. 320 


Pleon segments 5 and 6 coalesced .. . . 25. Fam. Atylidae . . . . p.327 
Pleon segments 5 and 6 not coalesced 

(Fig. 80) — 28. 
Lower lip, inner plates rather large; uropod 


27 


8 groatiy elongate.  .. » une. 2. 26. Fam. Melphidippidae . p.834 


Lower lip, inner plates small or wanting; 


uropod3 (Fig. 81) not greatly elongate —- 29. 5; 
p. 338 


Gnathopods 1 and 2, hands powerful (Fig.79) 27. Fam. Eusiridae . .. . 
29 
Gnathopods 1 and 2, hands not powerful. 29. Fam. Pontogeneiidae . p.356 


Imperfeetly developed eyescoveringthehead 41. Fam. Hyperiopsidae . p.714 
31 
Eyes, when present, not abnormal — 32. 
| Uropods2and3 (Fig. 103, 118) developed — 33. 


32 2 Uropods 2 and 3 (Fig. 121, 127), one or 


other wanting or radimentary 2... 40. Fam. Podoceridae. . . p.694 


Pleon (Fig. 110) compressed — 34. 

Pleon (Fig. 115,118), asarule, depressed— 38. 

Uropod 3 (Fig. 103) not uncinate — 35. 
Uropod 3 (Fig. 110) uncinate — 37. 

Gnathopod 1 (Fig. 101) larger than gnatho- 

Gn 


34 


ER EN ER 33. Fam. Aoridae. ... .. p. 585 


N 1 (Fig. 104, 105) not larger than 
gnathopod 2 — 386. 
ne Peraeopods 1—5 subcehelate. .. .... 35. Fam. Isaeidae . . . . p.630 
Lower lip with prineipal lobes notched. . 36. Fam. Ampithoidae . . p.631 


[> 
I 


Antenna 2 (Fig. 116, 117), flagellum not 
38 


1. Fam. Lysianassidae 


1849 Subfam. Lysianassinae, J. D. Dana in: Amer. J. Sei., ser.2 v.8 p. 136 | 1856 
Lysianassides, Bate (& Westwood) in: Rep. Brit. Ass., Meet. 25 p.21 | 1857 Lysiassides, 
Bate in: Ann. nat. Hist., ser.2 v.20 p.524 | 1857 Subfam. Lisianassini, A. Costa in: 
Mem. Acc. Napoli, v.1 p.173 | 1865 Subfam. Lysianassina + Subfam. Trischizostomatina, 
W.Lilljeborg in: N. Acta Soc. Upsal., ser.8 v.6 nr.1 p.18 | 1872 Prostomatidae + 
Subfam. Lysianassinae, A. Boeck, Skand. Arkt. Amphip., v.1 p.94; p.112 | 1874 Lysia- 
nassidae, Buchholz in: Zweite D. Nordpolarf., v.2 p.299 | 1888 L. + Valettidae, T, 
Stebbing in: Rep. Voy. Challenger, v.29 p. 606, 723 | 1890 L., G.O. Sars, Crust. Norway, 
v.1 p.28 | 1893 Lisianassidi, A. Della Valle in: F. Fl, Neapel, v.20 p. 769. 

Of side-plates 1—5 (Fig. 3, 4, 6) one or more deep (except in Valettia). 
Eyes (Fig. 3, 6) usually large, paired, rarely reduced each to a single lens 
(Hippomedon holbölli, Acidostoma sp.), sometimes degraded or absent (triple 
in Hirondellea). Antenna 1 (Fig.5, 9, 12) not longer than antenna 2, the 
1% joint tumid (except in Amaryllis, Fig. 5). Accessory flagellum always 
present (except in Lepidepecreum longicorne, p. 80). Flagellum of antenna 2 


Gnathopod 1 ee ae 28. Fam. Bateidae ... . p.355 


Uropod 3, both rami well developed. ... 31. Fam. Dexaminidae . . p.514 
Uropod 3, one ramus wanting or very small 32. Fam. Talitridae . . . p.598“ 


2 > 
ur en be m ne m az 


De a 5 LE a nl ln an u un Nun En a ae 


Peraeopods 1—5 not subchelate . . . . . 34. Fam. Photidae . . . . p.608 7 


Lower lip with prineipal lobes not notehed 37. Fam. Jassidae ... . . p.647 


N ER et SE 38. Fam. Corophiidae. . . p. Kr E 
Antenna 2 (Fig. 119), flagellum spatulate . 39. Fam. Cheluridae . . . p.69B x 1 


u a 


m 


ern u a 


Lysianassidae 


often differentiated ind. Lower lip without inner lobes. Mandible (Fig. 2, 7, 8), 
 eutting edge almost simple (dentate in Valettia and Podoprion, wanting in 
_ Kerguelenia, Fig. 2); accessory plate generally present on left mandible; 


| molar seldom very robust; palp 3-jointed. Gnathopod 2 (Fig. 10, 11) usually 


“ ‚slender and delicate, 3 joint elongate, 5th and 6th spinulose, 7tk minute. 


= _ Uropod 3 (Fig. 13) biramous (except in Acontiostoma and Stomacontion). 


= ‚Hepato-pancröatic tubes (so far as known) 4. 


' Marine, 


Synopsis of accepted genera: 
Mandible (Fig. 2) without distinet eutting 


we. 1 Re ER ER . 1. Gen. 
E.- Mandible (Fig. 7, 8) with dlstfogk eutting 
E edge — 2. 2 
2 ee greatly projecting below, more 
3 2 | or less stiliform — 3. 
@ Mouth-organs not stiliform — 6. 
3 Eyes and gnathopod 1 dig. 3) powerfully 
R: oe re ER 2. Gen. 
Be: , Eyes and gnathopod 1 Wei powerfully deve- 
Er - loped — 4. 
2 4 S Uropod 3 biramous . 0.0... 3. Gen. 
| U ropod 3 not biramous — 5. 
> Uropod 3 without rami. ........ 4. Gen. 
A Uropod 3 with a single ramus. . . . 5. Gen. 
6 Blei es it ; 6. Gen. 
Eyes, when present, paired — 7. 
7 Gnathopcd 1 chelate — 8. 
Gnathopod 1 not chelate — 12. 
8 Maxilliped, palp 3-jointed; telson not eleft ° 7. Gen. 
Maxilliped, palp 4-jointed; telson eleft — 9. 
Peraeopod 3, 2d joint deeply indentured . 8. Gen. 
9 | Peraeopod 3, 2d joint not deeply in- 
x dentured — 10. 
S ER; 10 Chela of gnathopod I narrow. .... . 9. Gen 
1 Chela of gnathopod 1 broad — 11. 
a 1 Telson much longer than broad .. ... . 10. Gen 
Er. Telson not much longer than broad . . . 11. Gen 
“ Ss Mandible, eutting edge strongly dentate 12. Gen. 
Mandible, eutting edge not strongly dentate — 13. 
13 | Maxzilla 1 without palp . .. ...... 13. Gen. 
Maxilla 1 with 2-jointed palp — 14. 
Mandible, molar rather strong; maxilliped, 
14 - palp ratherlong; gnathopod 1 subchelate; 
telson entire or not deeply incised *) 14. Gen. 
These characters not eombined — 15. 


. Opisa 
. Sophrosyne. 


49 accepted and 2 doubtful genera, 136 accepted species and 35 doubtful. 


Kerguelenia . 


Trischizostoma . 


Acidostoma 
Acontiostoma 


Stomacontion 
Hirondellea 


Podoprionella 


Podoprion 


Valettia 


Amaryllis 


Onisimus 


Cem Nr - 


zip 


. p.12 


. p-14 


De 
. p.16 


. p.16 


. P-25 


.*) Onisimus perplexes the arrangement by having the telson sometimes entire, 


sometimes as deeply cleft as in Paratryphosites (p. 42). From the latter it is separated 


sometimes has a small notch. 


by the much shorter outer plates of the maxillipeds. 


In Lysianassa (p. 37) the telson 


10 Lysianassidae 


15 Side-plates 1 and 2 (Fig. 6) very small — 16. 
Side-plates 1 and 2 not very small — 17. 

16 Peraeopod 3, 2d joint deeply indentured . 15. 
Peraeopod 3, 2d joint not deeply indentured 16. 

7 Telson entire — 18. 
Telson eleft — 24. 
Antenna 2, penultimate joint of pedunele 

18 N N a Ehe 5, 17: 
Antenna 2, penultimate joint of pedunele 

not dilated — 19. 

19 Uropod 3, inner ramus rudimentary . . . 18. 
Uropod3, inner ramus not rudimentary — 20. 

0 Mandible, molar well developed . ... . 19. 
Mandible, molar weak or obsolete — 21. 

91 Maxillipeds, palp 4-jointed -—— 22. 
Maxillipeds, palp 3-jointed — 23. 

99 f Maxilla 2, inner plate narrow . .... . 20. 
Maxilla 2, inner plate broad. ... . eh E 

93 Maxillipeds, inner plate short... .. - 22. 
Maxillipeds, inner plate long . .... . 23. 


4 Telson not deeply eleft — 25. 
Telson deeply cleft — 29. 


f Mandible, palp attached over molar — 26. 


a \ Mandible, palp attached behind molar — 27. 
96 Maxillipeds, 4th joint of palp short . . . 24. 
Maxillipeds, 4th joint of palp long. . . . 25. 
97 Gnathopod 1 subchelate ........ 26. 
Gnathopod 1 not subchelate — 28. 
Antenna 1, 2d and 3d joints not extremely 
28 BE EN Re ya Ah IS 27. 
Antenna 1, 24 and 3d joints extremely short 28. 
Side-plate 1, lower front angle coneealed— 30. 
29 > Side-plate 1, lower front angle not con- 
cealed — 31. 
Maxilla 1 with outer plate, maxilla 2 with 
inner plate, very broad . ...... 29. 
Maxilla 1 with outer plate, maxilla 2 with 
inner plate, not very broad . . . . . 380. 
31 Branchial vesicles more or less complex — 32. 
Branchial vesicles simple*) — 385. 
Branchial vesicles (Fig. 10) pleated on both 
sides — 33. 
Branchial riss pleated on one side 
only — 
33 es Gnathopod = not subchelate. ..... .» 31. 
Gnathopod 1 subeheläte ........ 32. 
34 | Gnathopod 1, finger short. . . . 2... 38. 
Gnathopod 1, finger lng.. ... .... 34. 
35 [ Peraeopod 3, 2d joint deeply indentured . 35. 
N ng, 94 Joint not deeply indentured — 36. 


ET In Tmetonyx miersi (p. 75) not quite simple. 


Gen. 
Gen. 


Gen. 


Gen. 


Gen. 


Gen. 
Gen. 


Gen. 
Gen. 


Gen. 
Gen. 


Gen. 


Gen. 
Gen. 


Gen. 


Gen. 


Gen. 
Gen. 


Gen. 
Gen. 


Gen. 


Cyphoecaris. .. . 
Cyelocaris 


Lysianella . . 


Onesimoides . . . 


Pseudalibrotus . . 


Nannonyx .... 
Lysianassa . 


Perrierella . . 
Normanion. .. . 


Paratryphosites 
Paronesimus . . 


Orchomene. ... 


Socarnoides 
Menigrates.. . . . 


Socarnes . ... . 
Hippomedon ... 


Glycerina 


u 0 


jr 


P“ 


Lan; 


a N Te Do 


Ba il ua dran (a 3 are Mari rn aa nr 
E a 7 % un vor a ve 


ni ab Br re re 


a Dr Kia Tell Ann a > a ne 


a 


rien u 1a Aut ab a a A ee 


Mandible, palp attached not behind the 
36 = molar — 37. 
Mandible, palp attached behind the molar —— 46. 
Gnathopod1, finger minute, shrouded among 
37 PR er 36. 
Gnathopod 1, finger not concealed — 38, 
38 Gnathopod 1 simple ..... 2... 37 
Gnathopod 1 aot simple — 39. 
39 Gnathopod 1 imperfeetly subehelate — 40. 
Gnathopod 1 distinetly subchelate — 41. 
40 Side-plates 1—4 closely packed . . .. . 38 
Side-plates I—4 not closely packed . . . 39. 
4 f Gnathopod 1, 6th joint distally widened . 40. 
\ Gnathopod 1, 6th joint not distally widened — 42, 
| Gnathopod 1, 6th joint much longer than 5th 41. 
42 2 Gnathopod 1, 6th joint not much longer 
| than 5th _- 48, 
Maxilla 2, inner plate not much shorter than 
43 | a ER N Be EEE Pe 42. 
Maxilla 2, inner plate much shorter than 
outer — 44, 
4 f Epistome not projecting . »....... 43 
\ Epistome projeeting — 45. 
45 Uropod 3, rami foliaceous. ...:.... 44. 
Uropod 3, rami lanceolate .. .....- 45 
46 Epistome with spiniform projeetion . . . 46. 
Epistome without spiniform projeetion — 47. - 
a a ER ee BR 47. 


Antenna 1, 1st joint not carinate, not pro- 


Antenna 1 (Fig. 12), 1st joint carinate, 
a 
duced — 48. 


48 


f Bodyrobust, epistome sometimes projeeting*) 48. 
\ Body slender, epistome not Brojecting*) . 49. 


Lysianassidae, Kerguelenia 


Gen. 


. Gen. 


. Gen. 
Gen. 
Gen. 


Gen. 


Gen. 


. Gen. 


Gen. 
. Gen. 


Gen. 


Gen. 


Gen. 
Gen. 


Scopelocheirus . 


Centromedon. . 


Cheirimedon . . 


Tryphosella 


Tryphosa 


Chironesimus. . . 


Eurythenes . 
Tmetonyx 


Tryphosites 


Lepidepecreum . . 


Orchomenella 


Orchomenopsis . . 


1. Gm. Kerguelenia Stebb. 


pe TE 


11 


. p.61 


p: 63 


p. 63 


. pP: 65 
- pP. 66 


- P.67 


... P-68 


1888 Kerguelenia (Sp. un.: K. compacta), T. Stebbing in: Rep. Voy. Challenger, 
v.29 p. 1219 | 1891 K., G. O. Sars, Crust. Norway, v.1 p.119. 


Side-plates, especially 4%, large and deep. Antenna 1 short in both 
sexes, with a dense brush only in JS; antenna 2 more-slender and scarcely 
longer than antenna 1. Mandible without cutting edge, spine-row, or molar; 
palp slender, apical (Fig. 2). Maxillae 1 and 2 normal, but very small. 
Maxillipeds with both plates small; palp elongate. Gnathopods 1 and 2 slender, 
elongate; 34 joint long, 7% minute; gnathopod 1 simple, gnathopod 2 chelate. 
24 joint broad in peraeopods 4 and 5, not in peraeopod 3; 4tk joint broad in 
peraeopods 3—5. Uropod 3 very small; rami rudimentary. Telson small, 


rounded, entire. 


2 species. 


*) No distinguishing feature between those two genera seems to be absolutely constant. 


12 Kerguelenia, Trischizostoma 


Synopsis of species: 


Gnathopod 1, 7th joint curved; peraeopod 3, 2d joint 

N EEE Tr Eh 1. K. compacta .p.12 
Gnathopod 1, 7th joint straight; peraeopod 3, 2d joint 

Mobea Deere ET ren 2. K. borealis . . p.12 


1. K. compacta Stebb. 1888 K.c., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1220 t.15a. 


Body eompact. Side-plates 1—4 deep, 4th greatly excavate behind 

for the 5%. Pleon segment 3 with postero-lateral angles almost quadrate. 

Eyes doubtful. Antenna lin ©, 1° joint stout, flagellum 

5 joints, accessory flagellum 3 joints. Antenna 2, last 

3 joints of pedunele nearly equal, flagellum 4 or 5 joints. 

Gnathopod 1, 34 joint longer than 4, as long as 5th; 

6!" narrow, tapering; 7" small, with 2 setules, one as 

long as the joint and plumose, projecting from its 

concave margin. Gnathopod 2 longer than gnathopod 1, 

34 joint not quite so long as 5tk; 5tlk much longer than 

6, both of them setose; the chela minute. Peraeopods 1 

and 2 with 4b joint a little widened. Peraeopod 3, 

24 joint not or scarcely expanded, 4! much wider than 

. the 34 or ‚5th, quite overlapping the latter behind; the 

6th rather longer, not broader, than the 5%, Peraeo- 

pods 4 and 5 with very widely expanded 24 joint, 

otherwise resembling peraeopod 3, but while 24 joint in 

peraeopod 5 is much larger than in peraeopod 4, the 

rest of the limb is smaller. Uropod 1 longer than uropod 2. Colour in 
spirit light brown. L. about 4 mm. 


Cumberland Bay [Kerguelen Island]. Depth 230 m. 


Fig.2. K. compacta. 
Mandible. 


2. K. borealis O.Sars 1891 K.b., G. O. Sars, Crust. Norway, v.1 p.119 1.40 f.2. 


Perhaps identical with K. compacta. Eyes triangular, imperfect, reddish 
with white border. Antennal in 9, flagellum 7-jointed, accessory flagellum 
4 joints. Antenna lin C, having last 2 joints of peduncle and base of flagellum 
more swollen and provided with dense brush of setae. Antenna 2, flagellum 
7 joints. Gmathopod 1, 7% joint continuous with tapering 6'", and provided 
with a strong secondary booth and 2 slender setae. Peraeopod 3, 24 joint 
expanded below into a lobe. Uropod 3 extremely small, rami much smaller 
than pedunele, the outer the smaller. Telson enclosed between the lateral 
parts of the preceding segments; its tip obtusely truncated. Colour bright 
orange. L. Q 5 mm. 


Arctie Ocean (Finmark, Nordland), Hardangerfjord Depth 190—280 m. 


2. Gen. Trischizostoma Boeck 


1853 Guerinia (Sp. un.: @. nicaeensis) (non Robineau-Desvoidy 1830, Diptera!), 
(Hope in MS.) A. Costa, Deser. 3 Crost. dal Hope, p.3 | 1853 @., A. Costa, Fauna 
Reg. Napoli, fase. Apr. 1853 p.1 | 1861 Trischizostoma (Sp. un.: T. raschii), A. Boeck 
in: Forh. Skand. Naturf., Mode 8 p. 637 | 1886 T7., Bovallius in: N. Acta Soc. Upsal., 
ser.ö v.13 nr.9 p.23 | 1888 T7., T. Stebbing in: Rep. Voy. Challenger, v. 29 p. xıx, 
‚272, 1673, etc. | 1890 T., G. O. Sars, Crust. Norway, v.1 p.29 | 1895 T., T. Stebbing 
in: Nat. Sci., e.6 p.265 | 1893 Guerina + T., A. Della Valle in: F. Fl. Neapel, v.20 
p. 775, 779. 


u Se A 4 an Eh 


Balz ne u Aa in 


€“ dh “re, here Pl} PRCHAD,- N Ra, 


Trischizostoma 13 


Back broadly rounded. Rostrum broad, apically rounded (Fig. 3). 
Side-plate 2 the largest. Eyes very large. Antenna 1 in ©, 1° joint large 
in both flagella; in 9 1° joint of principal flagellum very large. Antenna 2, 
ultimate joint of peduncle in © shorter than penultimate, in S thereverse. Mouth- 
organs in © (Sars): Upper lip long, narrow ; lower lip with lobes acutely lanceolate. 
Mandible, eutting edge very narrow, sharpened and obliquely truncated; 
accessory plate inconspicuous; no molar; palp very large and .densely setose. 
Maxilla 1, inner plate small, unarmed; outer very narrow, apically divided 
into small, elaw-like teeth (4 strong teeth, Bovallius); palp very minute but 
distinctly biarticulate. Maxilla 2, both plates very narrow, stiliform. Maxillipeds, 
inner plates very narrow, unarmed, 
outer plates linguiform, partly en- 
compassing the „other oral parts; 
palp geniculate at the middle, 
1° joint short, 4? Janceolate. Mouth- 
organs in J' (Della Valle): Upper 
lip long, not narrow, apex not emar-. 
ginate; lower lip with broad lobes, 
and a shorter pointed single lobe 
between them. Mandible narrowly 
spatulate, without true cutting 
edges; no molar, 3 spinules; palp very large and setose. Maxilla 1, no 
inner plate; outer plate elongate, tipped with 5 large teeth; palp reduced to a 
little tuberele. Maxilla 2, inner plate shorter and narrower than outer, apically 
pointed, with one setule, outer apically broad, with 2 or 3 little setules. 


Fig. 3. T. nicaeense. 
Lateral view. [After G. O. Sars.] 


- -Maxillipeds, inner plates very narrow, unarmed; outer plates as in ©, palp 


with 18 joint longer than 24 or 34, 4th Janceolate. Gnathopod 1 enormously 
developed, subchelate; in the adult of both sexes the hand is so inverted, 
that the finger seems to be attached to the wrong end of the palm. Uropods 


- with rami subequal, broadly lanceolate; outer ramus of 34 2-jointed. Telson 
small, entire. 


l species. 


1. T. nieaeense (A. Costa) 1853 Guerinia nicaeensis, A. Costa, Deser. 3 Crost. 
dal Hope, p.3 | 1853 @.n., A. Costa, Fauna Reg. Napoli, fase. Apr. 1853 p.2 | 1867 
@G.n., A. Costa in: Annuario Mus. Napoli, v.4 p.44 t.3 f.1 | 1888 Trischizostoma n., 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.272, 1673 | 1861 T. raschü, A. Boeck 
in: Forh. Skand. Naturf., Mode 8 p. 637 | 1872 T.r., A. Boeck, Skand. Arkt. Amphip., 
v.1 p.97 t.2 £.1] 1886 T.r., Bovallius in: N. Acta Soc. Upsal., ser.3 v.13 nr. 9 p.24 
t.3 f£.41—60 (2), 61-67 (Sjuv.) | 1890 & 95 T. r., G. O.Sars, Crust. Norway, v1 


" p.31 t.12 (2); p.673 | 1893 Gwuerina nicaeensis + T.r., A. Della Valle in: F. Fl. 


Neapel, 0.20 p. 776 t.61 £. 10--22 (5); p. 780. 


Rostrum in 9 horizontal, in J slightly depressed. Side-plates shallow, 
1° small, partly covered by the 24. Eyes almost meeting on the top of the 
head. Antenna 1, 1° joint large, 24 and 34 short; flagellum in Q 9-jointed; 
accessory flagellum subequal in length to 1° joint of primary, with 1 long 


‚and 2 minute joints; flagellum in J 8-jointed, 1 joint much larger than in O, 


furnished with rows.of hyaline filaments. Antenna 2 in ©, twice length of 
antenna 1; flagellum 24-jointed; flagellum in S 60-jointed, twice length of 
peduncle. Gnathopod 1, 6! joint greatly inflated, rounded triangular, the long 
palm armed with recurved teeth, those near the prominent prehensile angle 
stronger and elaw-like; 7% joint strong, eurved at the tip. Gmathopod 2 slender; 


14 Trisehizostoma, Aecidostoma 


34 joint very long, much more so in C than 9; the 5th longer in Q than J; 
6th oval, densely setose; 7" minute, inserted on the middle of distal margin 
of 6{", Peraeopods 1 and 2, 24 joint a little dilated, seemingly more in C 
than in 9; 4% joint dilated, especially in peraeopod 2, seemingly less in C 
than in O0. Peraeopods 3, 4 and 5 rather short, successively longer; 24 joint 
laminar. Telson rounded, almost as broad as long; apex obtusely truncated in ©, 
broad, oval in d, with a small emargination in young C (Bovallius’ figure). 
Colour whitish with light reddish tinge on sides (Sars), white as ivory; the 
eyes dark brown (Costa and Bovallius). L. © 22—30, S 12—13 mm. 

North-Sea, Skagerrak, North-Atlantic and Arctic Ocean (South-, West- and North- 
Norway), depth 190--475 m; Mediterranean. Usually on fishes. 


3. Gen. Acidostoma Lillj. 


1865 Acidostoma (Sp. un.: A. obesum), W.Lilljeborg in: N. Acta Soc. Upsal., 
ser.38 v.6 nr.1 p.18, 34 | 1890 A., G. O. Sars, Crust. Norway, v.1 p. 37. 

Body short, robust. Side-plates large, deep. Antenna 1, 24 and 34 joints 
short, in S but not in © nearly as stout as the 1°; 1° joint of flagellum 
small in Q, in J laminar, densely fringed; accessory flagellum in J and 9 
nearly as long as primary. Antenna 2 rather slender. Upper lip long, narrow. 
Lower lip with the lobes narrowed. Mandible with minute tooth at each 
end of eutting edge, narrow, simple; no molar; palp slender, nearly as long 
as the trunk, armed only at apex. Maxilla 1, inner plate small, narrow; outer 
plate narrow, tipped with small unguiform teeth, palp a rudiment. Maxilla 2, 
both plates stiliform. Maxillipeds, inner plates tapering, outer large without 
marginal teeth, palp scarcely reaching beyond outer plate, its 4! joint rudi- 
mentary. Gmnathopod 1 rather robust, 5tk joint subequal in length to 6th, 
the latter tapering, without palm. Gnathopod 2, 6! joint narrowly oblong, 
densely hirsute, 7! wanting. Peraeopods 3, 4 and 5 robust, 24 and 4th joints 
much expanded. Uropod 2 with broad peduncle; uropod 3 very small. 
Telson short, broad, more or less cleft or emarginate. 


2 species. 

Synopsis of species: 
Telson rather deeply cleft ..... N le 1. A.obesum. . . p.14 
Telson: süghtly emarginate 2... x nres. en 2. A. laticorne . . p.14 


1. A. obesum (Bate) 1862 Anonya obesus, Bate, Cat. Amphip. Brit. Mus., p. 74 
t.12 £.1 | 1865 Acidostoma obesum, W. Lilljeborg in: N. Acta Soc. Upsal., ser.3 v.6 
nr.1 p.84 t.5 | 1890 A. o., G. O. Sars, Crust. Norway, v.1 p.88 t.14 f.2. 

Pleon segment 3 with postero-lateral angles narrowly rounded. Eyes 
small, rounded, brownish. Antenna 1 in oO, flagellum 7-jointed, accessory 
flagellum 5-jointed, in S 1% joint of flagellum large, flattened, but arched 
below and armed with sensory filaments. Uropod 3 scarcely half as long as 
uropod 2, the rami lanceolate, unarmed, the outer one the longer. Telson 
almost as broad as long, rounded, cleft beyond the middle. Colour pale 
orange with light red bands across the segments. L. 5 mm. 

North-Atlantie, North-Sea and Skagerrak (Moray Firth, Shetland Islands, South- 
and West-Norway, Bohuslän, South-West-England, West-France). Depth, low tide 
mark to 90 m. 


2. A. laticorne O0. Sars 1879 A. laticornis, G. O. Sars in: Arch. Natury. 


Kristian., v.4 p.440 | 1885 & 86 A. laticorne, G. O. Sars in: Norske Nordhavs-Exp., 
v.6 Crust. I p. 152 t.13 f.3,3a (8) | ?1893. A. 1, A. Della Valle in: F. Fl. Neapel, v.20 
p- 782, 287,769; t.6 £.12; 1.28 £, 1-21 (2) | 1886 A. obesum (err., non Anonyx obesus 
Bate 1862 ) + Mi l., G. O. Sars in: Norske Nordhavs-Exp., v.6 Crust. II p. 43, 44. 


BE. 


aaa re u a ln ZZ 


ar 


ae 0 a in 


ul ib nu 10 Due a ie a ul 


4 
Mi 
3 
b 
i 


4‘ 


a a a El a AT HEn ehe aaa en nen ni ln alten nn Ellen maman. u maligne 


nF A 


a a Sa aa ie 7 a ae 3 
*“ k f 


Acidostoma, Acontiostoma 15 


Differs from A. obesum in the following points. Pleon segment 3, 


postero-lateral angles slightly projecting, but not acute. No eyes (small eyes, 


with a little biconvex cornea, Della Valle). Uropod 3 with the rami almost 
tubereular, scarcely reaching beyond pedunecle of uropod 2. Telson almost 
quadrate, slightly emarginate distally. Colour whitish (orange-yellow, Della 
Valle. L. o 11, 5 7°5 mm. 


Arctie Ocean (Lofoten Isles), depth 800—1200 m; ?Mediterranean, on Cereactis 
aurantiaca (Chiaje). 


4. Gen. Acontiostoma Stebb. 


1888 Acontiostoma (Sp. typ.: A. marionis) (part.), T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.709 | 1893 A., A. Della Valle in: F. Fl. Neapel, v.20 p. 785. 

Body compact (Fig. 4); side-plates large, deep, 1° pair projecting over 
sides of head. Antenna 1, 24 joint not extremely short, both flagella with 
few and very short joints, only in J 1* of primary enlarged and fringed 
with filaments. Upper lip with pointed apex. Lower lip with the lobes 


‚narrowed. Mandible long and narrow, without molar, palp slender, much 


shorter than the trunk. Maxilla 1, inner plate small, 

narrow, outer plate narrow with serrate spines, palp small, 

distinet, 1-jointed. Maxilla 2, both platesnarrow. Maxillipeds, 

the basal part robust, inner plates narrow, apically acute, 

outer plates apically angular, without marginal teeth, palp 

geniculate, scarcely reaching beyond outer plate, 1° joint IE 
short, 24 and 34 long, 4" small. Gnathopod 1 slender, Fe. A. marionis, 
not subchelate, 5% joint shorter than 6%. Gmnathopod 2 
with 6!" and 7% joints forming a feeble chela. Peraeopods 3, 4 and 5 robust, 
24 and 4% joints much expanded. Uropod 3 very short, without rami. 
Telson short, entire or emarginate. 


2 species. 


Synopsis of species: 


Integument solid, opaque . . 2... 5 een ki A manom.: 288 
Integument thin, pellueid .... 0... 2.2 2... 2. A. magellanicum . p.15 


1. A. marionis Stebb. 1888 A. m., T. Stebbing in: Rep. Voy. Challenger, v.29 
p- 709 t.30 | 1893 A. m., A. Della Valle in: F. Fl. Neapel, v.20 p. 786. 


Pleon segments 1—3 distally earinate on the back, 4!" with depression 
followed by elevated carina produced a little backward. Eyes large, oval. 
Antenna 1, 1° joint as long as rest of antenna, 29 as long: as the 7-jointed 
flagellum, accessory flagellum 2-jointed. Antenna 2 little longer than antenna 1, 
ultimate joint of peduncle much shorter than penultimate, a little shorter 
than the 7-jointed flagellum. Mandible with spine-row of 3 or 4 spinules, 
and in place of molar a ciliated tract. Maxilla I, palp small, acute, 
l-jointed. Maxillipeds, inner plates short, 4% joint of palp very short, with 
small oval spine within the tip. Gmathopod 2, 5!" joint a little longer 
than 6%, Uropods with many spines. Telson not much. longer than 
broad, apex rounded, girt with short spines. L. 7°5, height at centre rather 
over 5 mm. 


Southern Indian Ocean (Marion Island). Depth 90—-135 m. 


2. A. magellanicum Stebb. 1888 A. m., T. Stebbing in: Rep. Voy. Challenger, 
2.29 p. 714 t.31. 


16 Aecontiostoma, Stomacontion, Hirondellea 


Pleon segments 1—3 not carinate, 4!" with depression followed by small 
hump overhanging the following segments. Eyes small. Antenna 1 and 2 
nearly as in preceding species; flagellum 4-jointed, accessory flagellum 2-jointed. 
Antenna 2 rather shorter than antenna 1, flagellum 4-jointed. Mandible 
with strap-shaped secondary plate on left mandible, spine-row of 6 spinules, 
and eiliated traet. Maxilla 1, palp small, acute, 1-jointed. Maxillipeds, inner 
plates short, 4!" joint of palp forming a small but very distinct, straight, 
tapering finger. Gmathopod 2, 5" joint a little shorter than 6%, Uropods 
almost entirely devoid of spines. Telson short and broad, emarginate or a 
little eleft, with.2 spines on each apex. L. 3 mm. 


Possibility that this may be the young of A. marionis. 
Entrance to the Strait of Magellan (Cape Virgins). Depth 100 m. 


5. Gen. Stomacontion Stebb. 


1888 Acontiostoma (part.), T. Stebbing in: ng Voy. Challenger, v.29 p.709 | 
1899 Stomacontion (Sp. typ.: Acontiostoma pepinii), T. Stebbing in: Ann. nat. Hist., 
ser. 7 v.4 p.205. 


Agreeing in general with Acontiostoma © 15), but distinguished by 
maxilla 1 with palp 2-jointed, maxilliped with 4 joint of palp rudimentary, 
uropod 3 ending in a tubereular ramus. 


l species. 


1. S. pepinii (Stebb.) 1888 Acontiostoma p. + A. kergueleni, T. Stebbing in: 


Rep. Voy. Challenger, ©.29 p. 716 t.32 (2 or juv.); p- 720 .33 (3) | 1899 A.p, 


Stomacontion sp. typ., T. Stebbing in: Ann. nat. Hist., ser. 7 v.4 p. 206. 


oO or juv. Peraeon broadly rounded, afterpart of pleon compressed. 
Pleon segment 3 dorsally rounded, rising above the 4tk, which has a deep 
dorsal excavation, while the end is strongly upturned, with the process rounded 


behind. Eyes very small. Antennae about as in Acontiostoma, but peduncle 


of antenna 1 more-robust, flagellum 5-jointed, accessory flagellum 2-jointed. 
Antenna 2, flagellum 4-jointed. Mandible with 7 spinules and ciliated traet. 
Maxilla 1, palp minute, 2-jointed. Maxillipeds, inner plates long, 4!" joint of 


. palp quite rudimentary. Gnathopod 2, 5t" and 6!" joints subequal. Peraeopod 5, _ 


22 joint at lower hind corner quadrate, the point a little incised. Uropods 1 
and 2, each with subequal rami, uropod 3 with a single tubereular ramus. Telson 
with small apical noteh accompanied by spines and cilia. L. 2:5—7°5 mm. — 
d. Pleon segment 3 ending dorsally in a little upturned tip. Eyes large, 
oval. Antenna 1 distinguished by having 1° joint of 5-jointed flagellum 
enlarged and fringed with filaments, accessory flagellum 2-jointed. Antenna 2, 
flagellum 4-jointed. Mandible, with small bifid accessory plate on the left; 
2 or 3 spinules seen, but no ciliated tract. Gnathopod 2, 5tk joint longer than 
6, Peraeopod 5, 24 joint a little rounded at lower hind corner. Uropods 1 
and 2, each with the'rami unequal. Uropod 3 with one tubercular ramus. 
Telson with apical notch, and’spinules. L. 7°5 mm. 


Royal Sound [Kerguelen Island]. Depth 50 m. 


6. Gen. Hirondellea Chevreux 


1889 Hirondellea (Sp. un.: H. trioculata), Chevreux in: Bull. Soc. zool. France, 
v.14 p.285 | 1893 H., A. Della Valle in: F. Fl. Neapel, v.20 p. 836 | 1898 Hirondella 
(laps.), J. V. Carus in: Zool. Anz., Regist. 11—15 p. 142. 


et a ie 


Hirondellea, Podoprionella 17 


% Side-plate 1 narrow. 3 eyes. Mouth-orgaus prominent. Mandible 
elongate, palp attached behind molar. Maxilla 1 robust, palp broad and 
1 long, with teeth few but strong. Maxilla 2, plates broad, outer less so than 
inner. Maxillipeds, inner plates broad, quadrangular, obliquely truncate, outer 
plates broad, ovate, not reaching end of 24 joint of palp. Gmathopod 1 
subcheläte, gnathopod 2 minutely chelate. Peraeopods slender. Telson 
deeply emarginate. 


1 species. 


1. H. trioculata Ühevreux 1889 H.t., Chevreux in: Bull. Soc. zooi. France, 
v.14 p.285 f. * 


Body thick, peraeon carinate. Head short, lateral lobes broadly rounded. 
Side-plates 1—3 narrow, 4!" with smoothly rounded hind lobe. Pleon segment 3 
with postero-lateral angles a litile produced and acute, segment 4 with dorsal 
depression followed by rounded carina. One large oval eye occupying dorsal 
breadth of the head, two others narrowly erescent-shaped on the lateral lobes. 
Antenna 1, peduncle short and thick, flagellum with 12 joints, only the 1° long; 
accessory flagellum with 8 joints, only the 1° long. Antenna 2 not much longer 
than antenna 1, ultimate joint of peduncle rather shorter than penultimate, 
flagellum 13-jointed. Gnathopod 1, 6% joint rather longer than 5t", rectangular, 
palm almost straight, not long. Peraeopods 3—5, expanded 24 joint much longer 
than broad, largest in 5‘% peraeopod, which is shorter than 4%, Uröpods 
_ rather long, reaching back equally far. Uropod 2, inner branch a little longer 
- than outer, with spiniferous contraction above the apex. Telson longer than 
- peduncle of uropod 3, divided scarcely to the centre, the lobes strongly 
divergent. Colour bright amber yellow, sometimes tinted with rose, eyes 
yellow. L. 13 mm. 


4 North-Atlantie (Azores). Depth 1236 m. 


7. Gen. Podoprionella 0. Sars 
1895 Podoprionella (Sp. un.: P. norvegica). 6. O. Sars, Crust. Norway, v.1 p.687. 


Side-plate 1 short, 4" broadly and squarely expanded behind. Upper 
lip narrowly rounded. Maudibles, cutting edge smooth, spines rudimentary, . 
molar wanting, palp attached far back, its 24 joint elongate, 3% short. Maxilla 1, 
n0 inner plate observed. outer plate with strong teeth, palp normal. Maxilla 2, 
plates very short. Maxillipeds, inner plates narrow, tapering, outer plates large, 
both pairs nearly smooth, palp not reaching end of outer plate, 4" joint obsolete. 
Gnathopod 1 rather strong, chelate, 6'% joint much longer than 5t". Gnathopod 2 
minutely chelate. Peraeopods 3—5, expanded 24 joint with hind margin 

- deeply pectinatee Uropod 1 much longer than uropod 2, which is much 

-  _ Jonger than the small uropod 3. Telson entire, squamiform. 


.. 1 species. 


1. P. norvegica O. Sars 1895 P.n., G. O. Sars, Crust. Norway, v.1 p. 688 t.v. 


Body compact, peraeon thick; pleon small, segment 3 with small upturned 
- tooth at hind corners. Eyes rounded oval, with 10 large and strongly refractive 
- lenses, pigment dark brown. Antenna 1 in Q, 24 and 34 joints not extremely 
short, flagellum 5-jointed, shorter than peduncle, accessory flagellum 2-jointed. 
Antenna 2 scarcely as long as antenna 1, ultimate joint of peduncle shorter than 
- penultimate, flagellum 4-jointed, very short. Gnathopod I, a considerable 
_ «avity between the acute thumb and the curved finger forming the chela. 
4 Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 2 


18 Podoprionella, Podoprion 


Gnathopod 2 long and slender, 6" joint almost linear, exceeding '/, length 
of the long narrow 5t" joint. Peraeopods 1—5, joints 3—7 slender, 6!" longer 
than 5t%,. Uropod 1 with subequal rami, outer with 2 indents on outer margin, 
inner with 1 on each margin. Uropod 2 similar to uropod 1, except in size. 
Uropod 3, inner ramus scarcely more than half as long as outer. Telson 
rounded, with small indent on each side of rounded apex. Body pellueid, 
yellowish, showing a globular dilatation of intestine within hinder part of 
peraeon. L.3 mm. 


Trondhjemsfjord. Depth 110—150 m. 


8. Gen. Podoprion Chevreux 


1891 Podoprion (Sp. un.: P. bolivari), Chevreux in: M&m. Soe. zool.«France, v.4 
p-6 | 1893 P., A. Della Valle in: F. Fl. Neapel, 0.20 p. 774. 


Side-plate 1 much smaller than the following 3. Antenna 1 shorter 
than antenna 2; both with well developed flagella. Epistome little prominent, 
upper lip rounded. Lower lip with broad lobes, the mandibular processes 
turned forward instead of as usual backward. Mandibles broad and short, 
eutting edge quadri-dentate, accessory plate having 6 or 7 little conical teeth; 
molar little prominent, very near the extremity of the mandible, furnished 
with hooked and bearded teeth (perhaps the spine-row, with plumose seta-like 
spines); palp with 24 joint much the longest. Maxilla 1, inner plate with 
6 plumose setae, outer plate with several simple spines, divergent, of different 
sizes; the 2 joints of palp equal in length, 5 little spines on the apex. Maxilla 2, 
inner plate the broader with 14 plumose spines, outer plate with 12 simple 
spines. Maxillipeds, inner plates apically truncate; outer plates broadly oval not 
quite reaching end of long 24 joint of palp, teeth and spines fringing the 
inner and distal margins; 4" joint of palp curved, finger-like. Gmathopod 1 
chelate, 6% joint much longer than 5, the thumb short, curved, acute, 
leaving only a small space in the chela formed with it by the short hooked 
finger. Gnathopod 2 slender, 6t" joint much shorter than 5%, forming a 
sort of chela with the minute finger, but its produced apex rounded, not 
‚acute. Peraeopods 1—5 slender; all elongate, but especially the 4!" and 5th; 
6 joint in all longer than 5tk, In peraeopod 3 the expanded 24 joint has 
the hind margin eut into 6 large teeth; in the following peraeopods it is 
only slightly dentieulate. Uropod 1 with stiliform equal rami; uropod 2 much 
shorter, inner ramus the longer; uropod 3 with long lanceolate rami, the 
outer exceeding the other by a spine-like 29 joint. Telson long, deeply 
eleft, the apices standing apart, each notched for a spinule. 


1 species. 


1. P. bolivari Chevreux 1891 P. b., Chevreux in: Möm. Soe. zool. France, v.4 
p-6 t.1. 


Side-plate 4 comparatively narrow, shallowly excavate behind. Pleon 
segment 3 with corners quadrate, segment 4 with deep dorsal depression. 
Eyes large, reniform, red. Antenna 1, 1° joint with a distal tooth, 29 and 
34 very short; flagellum with 19 joints, 1° long, with brush; aecessory flagellum 
5-jointed. Antenna 2 nearly half as long as body; ultimate and penultimate 
Joints of peduncle subequal; flagellum with 30 short joints. In the telson 
the outer arm of each notched apex is longer than the inner. Colour pale 
rose. L. 11 mm. 


North-Atlantie (Vigo [Spain]). Depth 20 m. 


Euonyx 19 


9. Gen. Euonyx Norm. 
1867 Euony& (Sp. un.: E. chelatus), A. M. Norman in: Rep. Brit. Ass., Meet. 36 


2.197, 202 | 1888 E., T. Stebbing in: Rep. Voy. Challenger, v.29 p.668 | 1891 E., 


G. ©. Sars, Crust. Norway, v.1 p.116 | 1898 E., A. Della Valle in: F. Fl. Neapel, v.20 
p-841 | 1876 Leptochela (Sp. un.: Opis leptochela) (non Stimpson 1860, Decapoda!), 
A. Boeck, Skand. Arkt. Amphip., v.2 p. 190. 


Side-plate 1 small, partly concealed by 24. Mouth-parts differing in the 


.g species. Mandibles with eutting edge almost simple, molar weak or obsolete, 


palp central or subcentral. -Maxilla 1, inner plate not large, outer plate broad, 
obliquely truncate, palp normal. Maxilla 2, inner plate the shorter, obliquely 
truncate. Maxillipeds, 24 joint of palp reaching beyond the outer plates. 
Gnathopods 1 and 2 slender, 34 joint elongate; gnathopod 1 chelate, gnatho- 
pod 2 subchelate. Uropod 3, rami lanceolate, the outer with a small second 
joint. Telson oblong, deeply cleft. 


2 species. 


Synopsis of species: 


Gnathopod 1, 5th and 6th joints subequal . *. . .. . .»+.1 E.chelatus . .p.19 
Gnathopod 1, 5th joint much shorter than 6th. ..... 2. E. normani . . p.19 


1. E. chelatus Norm. 1867 E.c., A. M. Norman in: Rep. Brit. Ass., Meet. 36 
p. 197, 202 | 1888 E. c., T. Stebbing in: Rep. Voy. Challenger, v.29 p.673 | 1891 E. e., 
G. ©. Sars, Crust. Norway, v.1 p.117 t.40 £.1| 1893 E.c., A. Della Valle in: F. Fl. 
Neapel, 0.20 p.842 | 1868 Opis leptochela, Bate & Westwood, Brit. sess. Urust., v.2 
p- 501 ! 1876 O.1., Leptochela, A. Boeck, Skand. Arkt. Amphip., v.2 p. 190. 


Pleon segment 3, postero-lateral angles produced to a short blunt 
point; segment 4 with dorsal depression followed by high compressed hump. 
Eyes a constrieted oval, chalky white. Antenna 1 large, 1° joint concave 
above; flagellum twice length of peduncle, with 10 joints, 1% very large; accessory 
flagellum 5-jointed. Antenna 2 twice length of antenna 1, ultimate and pen- 


E - ultimate joints of peduncle equal, flagellum 22-jointed. Mandible with molar 


obsolete, palp on distal side of centre. Maxilla 1, inner plate with several 
apical setae. Maxillipeds, outer plates rather small with slender setae on the 


margin, but no spine-teeth. Gmathopod 1 with few setules, 34 joint longer 
- than 5th or 6th, 6tk with hind margin straight, the elosely adjacent finger 


and thumb forming a chela of about '/, length of the hand. Gnathopod 2 


; longer and stronger than gnathopod 1, 6'" joint about '/, length of 5, 


distally widened, palm concave, 7!" joint strong and curved. Peraeopods 3—5, 


2 joint not very large, rounded, 4! much expanded. Uropod 3 with the 


rami unarmed, the inner reaching 24 joint of outer. Telson without spinules, 
oblong, cleft much beyond the middle, apices blunt. Colour whitish tinged 


= with yellow. L. © 10 mm. 


Arctic Ocean, North-Atlantie and Irish Sea (Finmark, Trondhjemsfjord, Hebrides, 
Isle of Man). Depth 95—280 m. 


2. E.normani Stebb. 1888 E.n., T. Stebbing in: Rep. Voy. Challenger, v. 29 
p- 669 t. 19. 


Pleon segment 3, postero-lateral angles blunt; segment 4 a little raised 

behind the dorsal depression. Eyes indistinet, narrowly oval. Antenna 1, 

1% joint stout, not concave above; flagellum more than twice length of 

peduncle, with 29 joints, 18: very large; accessory flagellum 9-jointed. Antenna 2, 
9% 


20 Euonyx, Opisa 


not much longer than antenna 1, ultimate joint of peduncle shorter than pen- 
ultimate, flagellum 35-jointed. Mandible with molar distinct but not denticulate, 
palp central. Maxilla I with 3 plumose setae on inner plate. Maxillipeds, outer 
plates rather large, but not reaching end of 24 joint of palp, spine-teeth of 
inner margin minute and numerous. Gnathopod 1 with few setules, 39 joint 
longer than 5%, much shorter than 6th, 4th and 5fh joints equal, 6" with 
hind margin concave, the elosely adjacent finger and thumb forming a chela 
of not more than '/, length of hand. Gmathopod 2 longer, not stronger than 
gnathopod 1, 6" joint slender, not widening distally, about "/, length of 5tk, 
the minute 7! joint not curved, but elosely adjusted to the oblique palm. 
Peraeopods 3—5, 24 joint roundly quadrangular, 4! very moderately expanded. 
Uropod 3 with many little spines on the short broad rami, of which the 
inner reaches the 24 joint of the outer. Telson with some marginal spinules, 
oblong, eleft ?/, length, apices blunt, notched. L. © 15 mm. 
South-Paeifice (Kermadee Islands). Depth 1140 m. 


10. Gen. Opisa Boeck 


1842 Opis (Sp. un.: O, eschrichtii) (non Defrance 1825, Mollusca!), Kroyer in: 
Naturh. Tidsskr., v.4 p.149 | 1876 Opisa (Sp. typ.: Opis typica), A. Boeck, Skand. 
Arkt. Amphip., e.2 p.190 | 1890 O., G.O.Sars, Crust. Norway, v.1 p.36 | 1893 ©. 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 806. 

Side-plate 1 short, partly concealed by 24, 4! deeply excavate behind. 
Upper lip rather broadly rounded. Mandible. eutting edge smooth, spine-row 
feeble, molar obseure, in any case without triturating surface; palp rather 
far back, 24 joint strongly setiferous. Maxilla 1 normal, 2 setae on narrow 
inner plate. Maxilla 2, plates setose only apically. Maxillipeds, inner plates 
normal, outer plates angular at apex, inner margin denticulate, palp normal, 
rather short. Gnathopod 1 chelate, 5!" joint small, 6!R greatly widened, the 
thumb acute, not very long, leaving a great cavity between itself and the 
much eurved finger (7 joint). Gnathopod 2 subchelate. Peraeopods 1--5 
not elongate, most of the joints slender, 24 joint in peraeopods 3—5 greatly 
expanded. Uropod 3 elongate. Telson elongate, deeply cleft. 

l species. 

1. ©. eschrichtii (Kroyer) 1842 Opis e., (Holbell in MS.) Kroyer in: 
Naturh. Tidsskr., v.4 p. 149 | 1876 Opisa eschrichti, A. Boeck, Skand. Arkt. Ampbip., 


v.2 p.190|1890 O.e., G. ©. Sars, Crust. Norway, v.1 p.36 t. 14 f.1'1893 O. eschrichtü, 


A. Della Valle in: F. Fl. Neapel, v.20 p.806 | 1846 Opis typica, Kreyer in: Naturh. 
Tidsskr., ser.2 v.2 p.46 | 1846 O.t., Kroyer in: Voy. Nord, Crust. t. 17 £.1. 

Pleon segment 3, postero-lateral angles rounded. Eyes rather large, 
oblong, pigment dark brown. Antenna 1, 1° joint very large, flagellum 


8-jointed, about as long as peduncle, 1° joint very large, especially in J,' 


accessory flagellum 5-jointed, rather long. Antenna 2 in Q scarcely longer 
than antenna 1, in J as long as body, with ealceoli. Gmathopod 1, 6% joint 
nearly globular. Gnathopod 2, 6tk joint about "/, length of 5tk, slightly 
dilated distally, apex truncate. Peraeopods 3—5, 24 joint large, rounded 
oval, nearly as long as -rest of limb. Uropod 3, rami much longer than 
peduncle, outer ramus the longer, with distinet terminal joint. Telson about 
3 times longer than broad, cleft nearly to base, 2 pairs of dorsal and 1 of 
terminal spinules.. Whitish, with dark brown intestine seen through skin. 
L. 7—8 mm. 

Arctic Ocean, North-Atlantic, North-Sea and Skagerrak (Iceland, Norway); 
Korea Sea, depth 66 m. 


E 
3 
1 


Sophrosyne 2 


11. Gen. Sophrosyne Stebb. 


1888 Sophrosyne (Sp. ün.: S. murrayi), T. Stebbing in: Rep. Voy. Challenger, 
v.29 p. 652 | 1891 S., T. Stebbing & D. Robertson in: Tr. zool. Soe. London, v. 131 
p-81 | 1893 $., A. Della Valle in: F.Fl. Neapel, v.20 p.795 | 1899 Paropisa (Sp. typ.: 
Opisa hispanc), T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p. 206. 


Mandible, molar wanting, palp affıxed far forward, 24 and 39 joints 
subequal. Maxilla 1, inner plate small, with 1 seta, outer plate feebly armed, 
palp with few spine-teeth. Maxilla 2, inner plate much shorter than outer, 
neither strongly setose. Maxillipeds slender, inner and outer plates very small, 
the palp elongate. Gmnathopod 1 robust, 5t" joint triangular, somewhat 
produced, 6! broadly oblong. produced into a sharp tooth, opposed to the 
rather powerful finger almost chelately. Gnathopod 2 subchelate. Peraeopods, 
e. Joint rather elongate. 24 joint broad in peraeopods 3—5. Uropod 3, 
rami unarmed, the inner very little shorter than the outer. Telson not very 
elongate, partiaily eleft. 


3 species. 
Synopsis of species: 


Aare ö, hind margin of 2d joint produced 


BOWONMAR SE ee 3. 8. hispana . . . p.22 
| Peraeopod 5, hind margin of 2d joint not produced 
downward — 2. i 
9 f. Telson cleft: beyond the eenire ... » ... 3-2... 1. 8. murrayi. . . p.21 
\ Telson not eleft to the centre . ......... 2. 8. robertsoni. . p.21 


1. S. murrayi Stebb. 1888 S. m., T. Stebbing in: Rep. Voy. Challenger, v.29 
p- 652 t.15 | 1895 S. m., A. Della Valle in: F. Fl. Neapel, v.20 p. 795 t. 60 f.38. 


Pleon segment 3, postero-lateral angles acutely upturned, back with a 
pair of humps and distally squared, segment 4 abruptly narrower. Antenna 1, 
1° joint rather elongate, 24 longer than the 1% joint of the 7-jointed 
flagellum, accessory flagellum 4-jointed. Antenna 2, ultimate joint of peduncle 
shorter than penultimate, flagellum 8-jointed. Maxillipeds, inner plates not quite 
reaching base of palp. Gmathopod 1, 34, 4th and 5th joints strongly and 
densely spined along the hind margin, palm of 6!" joint spinulose. Gnathopod 2, 
6" joint more than half as long as 5t", distally widened, with concave palm, 
finger curved. Uropod 3, rami short, the inner a little shorter than the outer. 
Telson as broad as long, cleft dehiscent, not quite ?/, of the length, apices 
broadly rounded. L. © about 13 mm. 


Christmas Harbour [Kerguelen Island]. 


2. S. robertsoni Stebb. & D. Roberts. 1891 S. r., T. Stebbing & D. Robertson 
in: Tr. zool. Soc. London, v.131 p.3l t.5a | 1893 $. r., A. Della Valle in: F. Fl. Neapel, 
v.20 p. 795. 


Pleon segment 3, postero-lateral angles acutely upturned, back arched, 
not distally squared, segment 4 with 3 little dorsal humps. Antenna 1, 
18t joint rather tumid, 24 longer than the short 1° joint of the 6-jointed 
flagellum, accessory flagellum 3-jointed. Antenna 2, ultimate joint of peduncle 
shorter than penultimate, flagellum 8-jointed. Maxillipeds, inner plates not 
nearly reaching base of palp. Gnathopod 1 as in S. murrayi, but more feebly 
armed. Gnathopod 2, 6% joint narrow just at the base, but thence of uniform 


22 Sophrosyne, Valettia 


width, palm very small, convex. Uropod 3, rami scarcely showing any difference 
in length. Telson longer than broad, cleft dehiscent, not quite reaching the 
middle, apices broad, slightly indented. L. 90 6 mm. 


Firth of Clyde [Scotland]. 


3. S. hispana (Chevreux) 1887 Opis h., Chevreux in: Bull. Soe, zool. France, 
v.12 p.567 | 1888 Opisa h., T. Stebbing in: Rep. Voy. Challenger, v.29 p.1641 | 1893 
O.h., A. Della Valle in: F. Fl. Neapel, v.20 p. 807 I 1899 O. h., Paropisa sp. typ., 
3 Stebbing in: Ann. nat. Hist., ser. 7 v.4 p. 206. 


Head, lateral angle little prolonged, rounded. Side-plate 1 broader 
and deeper than the 2 following. Pleon segment 3, postero-lateral corners 
slightly produced backward, quadrate, 4" slightly gibbous. Eyes wanting. 
Antenna 1, flagellum 4-jointed, with long setae, accessory flagellum 2-jointed. 
Antenna 2, penultimate joint rather longer than ultimate of peduncle. Gnatho- 
pods 1 and 2 apparently as in S. robertsoni. Peraeopod 5, 24 joint widely 
expanded behind and produced downward to middle of 4%, its margin dentate. 
Uropod 3, rami smooth, a little longer than pedunele. Telson as broad as 
long, eleft to the centre. L. 2 mm. 


North-Atlantie (Cape Finisterre). Depth 510 m. 


12. Gen. Valettia Stebb. 


1888 Valettia (Sp. un.: V. coheres), T. Stebbing in: Rep. Voy. Challenger, v.29 
p. 723 | 1893 V., A. Della Valle in: F. Fl. Neapel, v.20 p. 772. 


None of the side-plates especially large. Mandible broad and short, 
the cutting edge strongly dentate, secondary plate on left mandible also 
strongly dentate, molar denticulate, palp central. Maxillipeds, inner plates 
with more than 3 apical teeth, outer plates at apex acutely produced, inner 
margin without teeth, 1° joint of palp not shorter than 24. Gnathopods 1 and 2 
subchelate, the 24 little weaker than the 1° and of similar structure except 
in having the 34 joint elongate. Peraeopods 3—5, with the 24 joint so 
little expanded, that these limbs are not imbricated as usual, but stand apart. 
Uropods successively shorter, rami of each pair unequal. Telson short, broad, 
cleft beyond the middle. 


l species. 


1. V. eoheres Stebb. 1888 V.c., T. Stebbing in: Rep. Voy. Challenger, v.29 
P. 724 t. 34. 


Side-plate 4 little excavate behind. Pleon segment 3, angles acute, 
a little upturned, 4" with dorsal depression followed by small distal hump. 
Eyes not observed. Antenna 1, pedunele short, stout, 1° joint scarcely longer 
than broad, flagellum with 13 or 14 joints, 1° subequal in length to peduncle, 
accessory flagellum with 1 long and 3 short joints. Antenna 2 subequal in length 
to antenna 1, ultimate joint of peduncle shorter than penultimate, flagellum 
14-jointed. Maxilla 1, inner plate with 5 short plumose setae, outer with 8 or 9 
slender spines, 24 joint of palp long, with 6 spine-teeth. Maxilla 2, with about 
12 spines on each plate. Gnathopod 1, 34 and 4 joints short, 5t® shorter 
than 6%, which is oblong, not 1'/, times as long as broad, palm rather deeply 
concave, 7*k joint curved, not massive, impinging on palmar spines. Gnatho- 
pod 2 similar to gnathopod 1, but 34 joint longer than 4%, and 5'% longer 
than 6%, which has the palm not concave, but sloping inwards, a little 


% DEE EI AT PEODD) N Be UNE aA 
T 5‘ FERN NET BE ee tee: 


Valettia, Amaryllis 23 


crenate. Peraeopods 1 and 2, 4 joint broader and much longer than 5%, 
Peraeopod 3, 24 joint a narrow oval. Peraeopod 4, 24 joint rather larger 
than in peraeopod 3. Peraeopod 5, 24 joint expanded above, narrowing 
below. Uropod 3, rami short, broad, the outer the longer by a minute 
24 joint. Telson with rounded apices. L. 12:5 mm. 


Antarctie Ocean (lat. 62° 26° S.) Depth 3612 m. 


13. Gen. Amaryllis Hasw. 


1880 Amaryllis, Haswell in: P. Linn. Soc. N.S.Wales, v.4 p.253 | 1888 A., 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.698 | 1895 A., A. Della Valle in: F. Fi. 
Neapel, v.20 p. 781. 


Head very deep. Peraeon segment 1 shallow, segments successively 
deeper to 24 of pleon. Side-plate 1 very small, 4% abruptly larger than 
those preceding it. Antenna 1 (Fig. 5), 1% joint not very stout, 24 and 
34 not very short. Mandible, cutting edge simple, secondary plate of left 
mandible denticulate, spine-row with many short spines, molar feeble, ciliated, 
not dentieulate, palp behind centre of trunk. Maxilla 1, inner plate with 
2 plumose setae, palp wanting. Maxillipeds, inner and outer plates large, 
outer without spine-teeth, "4 joint of palp small, obtuse, without a nail. 
Gnathopod 1 simple. Gnathopod 2 subchelate. Telson cleft. 


3 species accepted, 1 doubtful. 


Synopsis of accepted species: 


| Antenna 1, 2d joint much longer than 3d . . 1. A.haswelli ..... p- 23 
1 ! Antenna 1, 2d joint not much longer than 
| 3d — 2. 
j Peraeopod 3, 2d joint expanded above. . . . 2. A. macrophthalma. . p.24 
\ Peraeopod 3, 2d joint not expanded above. . 3. A. bathycephala. . . p.24 


E 1. A. haswelli Stebb. 1888 A.A., T. Stebbing in: 
Rep. Voy. Challenger, v.29 p. 703 t.28 | 1893 A. h., A. Della 
‚Valle in: F. Fl. Neapel, v.20 p. 781. 


Pleon segment 3,- with the angles acute, not 
upturned, the hind margin bulging above them. Eyes 
not distinetly observed. Antenna 1 (Fig. 5), 1° joint vn 
elongate, and ending in a tooth '/, length of 24 joint; 
24 thrice length of 3; flagellum with 24 joints, 15 shorter 
than last of peduncle; accessory flagellum 4-jointed. An- Yale — 
tenna 2 subequal to antenna 1, ultimate joint of pedunele 
about '/, length of penultimate, flagellum 22-jointed. 
Maxilla 1, outer plate carrying 11 spines. Gnathopod 1, 
24 joint as long as the 4 following combined and Yan 
much wider than any, 3% as long as 4", 5th Jonger ” 
than the long tapering 6%, which has the hind margin 
pectinate; there are many spines and setae on these 
joints; 7 joint small, eurved. Gnathopod 2, 24 joint 
not as long as 5tk and 6" combined, 34 longer than 
4th, 5th nearly twice as long as 6tk, both slender, 
densely furred; 7th joint small, much curved, over- 
arching the narrow palmar margin. Peraeopods 1 and 2 
slender. Peraeopod 3, side-plate much wider than N EEE 
24 joint, with hind lobe the longer, 4% joint longer a 


Flagellum — 


Dir a SUR le ie En ee I u en > u. 1 4 4 P} r u >, v = Pi a a 
ae u a Er Tas En 6 ELSE urste Snahnsll 3a 32 2 au a a 1 Gala Ua ann al a la a ae and ln a er ee Te a ie an En 
ö R EEE EEE N N SEE ET NEROHFRTTN ee ' ATTEREN: a SS Bi na ee Kahn BB: 
Y . » . 3 u y " baden Be TE + F 


Be a un 


24 Amaryllis 


and much broader than 5", Peraeopod 4, 24 joint oblong, with rounded 
lower hind corner. Peraeopod 5, 24 joint larger than in preceding limb, 
lower hind corner quadrate. Uropod 2 with rami unequal, the longer having 
a constrietion. Uropod 3 with stiliform subequal rami longer than the peduncle. 
Telson shorter than pedunele of uropod 3, celeft a little beyond centre, 
narrowing to the divergent apices. L. © about 11 mm. 

North-Atlantie (Azores). Depth 1829 m. 

2. A. macrophthalma Hasw. 1880 4A. macrophthalmus + A. brevicornis, 
Haswell in: P. Linn. Soe. N.S.Wales, v.4 p.253 t.8 f.3; p.254 | 1888 A. m., T. Stebbing 
in: Rep. Voy. Challenger, v. 29 p. 707 t. 29 | 1893 y m. (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p.781. 

Pleon segment 3, postero-lateral eorners squarely upturned, forming a 
little pocket above the point, but in the small Patagonian specimen acute, 
not upturned. ‚Eyes vertically elongated, suberescentic. Antenna 1, 3 joints 
of peduncle not very elongate, 24 and 34 nearly equal, flagella variable, 
primary with 17, 30, 18, 5 joints in different speeimens, accessory flagellum with 
13, 7,5, 2 joints, respectively. Antenna 2, ultimate joint of peduncle shorter than 
penultimate. Gnathopod 1, 3% joint longer than 4, 5th joint shorter than the 
tapering strongly pectinate 6th, 7th joint short, slightly curved. Gnathopod 2 
not extremely slender, 5t joint only a little longer than 6", which is elongate, 
of uniform width, 7 joint small, rather stout at the base. Peraeopods 3, 4 
and 5, 24 joint roundly expanded, 4" joint broad, not elongate. Uropod 2 with 
rami unequal, the longer constrieted. Telson reaching a little beyond peduncele 
of uropod 3, eleft .a little beyond the middle, apices broad, not divergent. 
L. about 6—20 mm. 

South-Pacifie (Tasmania; Port Jackson [East- Amen) sublitoral); Strait of 
Magellan (Cape Virgins, depth 100 m). 

3. A. bathycephala Stebb. 1888 A. bathycephalus, T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.699 t.27 | 1893 A. macrophthalmus (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 781. 

Side-plates 4 distinguished from those of 2 preceding species by being 
broader than deep and having the backward prolongation much more rounded. 
Pleon segment 3, postero-lateral eorners squarely wpturned, forming a little 
pocket above the point. Eyes large, inversely flask-shaped. Antenna 1, 1° joint 
rather long, 24 longer than 34, flagellum with 10 or 11 joints, 18t not longer 
than 24, aecessory flagellum 3-jointed. Antenna 2, ultimate joint of peduncle 
a little shorter than penultimate, flagellumı 9-jointed. Gnathopod 1 as in the 
preceding species. Gnathopod 2, 5% joint decidedly longer than 6t", 6 Jong, 
dilating towards the oblique palm, 7% joint small, eurved, not reaching end of 
palm. Peraeopod 3, hind lobe of side-plate more produced downwards than in 
A. macrophthalma, 24 joint pear-shaped, narrow above, with a rounded decurrent 
lobe below. Peraeopods 4 and 5, 24 joint broadly oval, 4" joint as in peraeo- 
pod 3 moderately expanded. Uropod 2, rami unequal, the longer constricted. 
Telson not nearly reaching end of peduncle of uropod 3, cleft scarcely beyond 
centre, apices rounded, scarcely divergent. L. about 6 mm. 

- Port Phillip [Melbourne]. Depth 60m. 


A. pulchella Bonnier 1896 4A. pulchellus, J. Bonnier in: Ann. Univ. Lyon, 
v.26 p. 624 t.36 £.3. 

Probably identical with A. haswelli (p. 23). Gnathopod 1, 5th joint shorter 
than 6th (equal in fig... Gnathopod 2, 5th joint not very much longer than 6th and 
rather narrower. L. 2 11 mm. 

Bay of Biscay. Depth 950 m. 


Fol ee TS er Eee a a Eee ee ae 3, h 
sa de SE AN Mr ü a ng 


ar he a a An al: rl a u a a 2 Zu u ee 


#5 
LER, 4 . 
ul a 2 ae er 


Ha Be SE a Beat Pak N Dre BE ee AEn ee 
A HT Fer Te , 


25 


14. Gen. Onisimus Boeck 


1871 Onisimus (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.111 | 1894 
O., T.Stebbing in: Bijdr. Dierk., v.17 p.10 | 1872 & 76 Onesimus (part.), A. Boeck, Skand. 
Arkt. Amphip., v.1 t.4—6; v.2 p.161 | 1891 O., G. O. Sars, Crust. Norway, v.l p. 104 | 
1893 O., J. Bonnier in: Bull. sei. France Belgique, v.24 p.174 | 1893 Pseudalibrotus 
(Sp. un.: P. littoralis) (part.), A. Della Valle in: F. Fl. Neapel, 0.20 p. 798. 


Body rather robust. Side-plates of moderate size, pleon segment 3 
with postero-lateral corners distinetly produced. Antenna 1, peduncle stout, 
24 and 3% joints very short, both antennae in G longer than in 9 and provided 
with distinet calceoli. Epistome very slightly prominent, defined from upper 
lip by a distinct sinus. Mandible, molar rather strong, palp not large, set 
well forward. Maxilla 1, inner plate with 2 setae, outer broad, obliquely 
truneate, with Li spines, several (5—8) spine-teeth on palp. Maxilla 2, 
outer plate broader and much longer than inner. Maxillipeds normal, outer 
plates erenulate, carrying on rounded apex 1—3 spines, not reaching beyond 
24 joint of slender, rather elongate palp. Gmnathopod 1 subchelate, not very 
robust, 6% joint narrowly oblong, little or not at all longer than 5th, 
Gnathopod 2, 6* joint uniformly narrow or distally widened. Peraeopods 3—5 
rather short and robust. Uropod 3 short, outer ramus with small 24 joint, 
and sometimes setiferous. Telson short and broad, never deeply incised, 
sometimes entire, 


8 species. 
Synopsis of species: 


1 | Eyes large; telson ineised — 2. 


Eyes small; telson not ineised — 5. 
9 | Gnathopod 1, 6th joint longer than 5th. . . 1. O.edwardsü. . . . - p- 25 
\ Gnathopod 1, 6th joint subequal to 5th — 8. 
| Peraeopods 3—5, 4th joint very robust . . . 2. O.plautus. .....p.2%6 
Peraeopods 3—5, 4th joint not very robust — 4. 
Pleon segment 1, antero-lateral angles unceinate 3. O.normani ..... p. 26 
4 | Pleon segment ], antero-lateral angles not 
BROTEBO 2: 04, DS TUEMAUE: 72,2. p. 26 
Telson apically truncate . . . .. 2.2... 5. O. breviecaudatus . . p.27 
Telson apically indented — 6. 
l Gnathopod 2, palm widened, emarginate. . . 6. O.carieus . . . . . .p.27 
6 ' Gnathopod 2, palm not widened, nor emargi- 
\ nate — 7. 
7 | N RER ER 1. a leueopis er. p- 28 
RE RR Re, N ER p- 28 


1. O. edwardsii (Kroyer) 1846 Anonyx e., Kreyer in: Naturh. Tidsskr., ser. 2 
v.2 p.1,41'| 1846 A.e., Kroyer in: Voy. Nord, Crust. t.16 f.1 | 1893: A. e. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 828 | 1871 Onisimus e., A. Boeck in: Forh. 
Selsk. Christian., 1870 p.113 | 1894 O.e., T. Stebbing in: Bijdr. Dierk., v.17 p.10 | 
1872 & 76 Onesimus e., A. Boeck, Skand. Arkt. Amphip., v1 t.6 f.4; «2 p. 167 | 1891 
O. e., G. ©. Sars, Crust. Norway, o.1 p. 105 t. 36 £.1. 


Head, lateral angles but slightly projecting, evenly rounded. Side-plate 1 
rather expanded below, 4!" with hinder expansion short, obtusely truncated. 
Pleon segment 3, postero-lateral angles produced to a narrow slightly upturned 
lobe. Eyes rather large, oblong oval, slightly expanding below, bright red. 


26 Önisimus 


Antenna 1 in 9 ‚flagellum with 15 joints, 1° equalto 24 and 3X combined, accessory 
flagellum 6-jointed. Antenna 2 a little longer than antenna 1, flagellum 
18-jointed. Gnathopod 1, 6% joint much longer than 5%, distally a little 
curved, palm not very oblique, somewhat arcuate, finely denticulate. Gnatho- 
pod 2 very slender, 6% joint more than twice as long as broad, more than 
half as long as 54, scarcely dilated distally, palm and finger minute. 
Peraeopods 3—5, 4 joint moderately robust, 24 of 5th pair large, as long 
as rest of limb. Uropod 3 with 2 spinules on inner margin of inner ramus. 
Telson rounded, scearcely longer than broad, incision very short, apices broad. 
"Colour pale reddish yellow, eggs in pouch bright orange. L. 11—14 mm. 


Arctic Ocean; North-Atlantie and North-Sea (West-Norway). Depth 15—94 m. 


2. O. plautus (Kreyer) 1845 Anonyx p., Kroyer in: Naturh. Tidsskr., ser.2 


v.1 p.629 | 1846 A.p., Kroyer in: Naturh. Tidsskr., ser.2 0.2 p.39 | 1846 A. 2 (part.), 
Kroyer in: Voy. Nord. Crust. t.15 f.2 | 1893 4A.p. (part. .), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 828 | 1866 Lysianassa plauta, Go&s in: Öfv. Ak. Förh., v.22 p.521| 
1871 Onisimus plautus, A. Boeck in: Forh. Selsk. Christian., 1870 p.112 | 1894 O.p., 
T. Stebbing in: Bijdr. Dierk., e.17 p.10 | 1872 & 76 Onesimus p., A. Boeck, Skand. Arkt. 
Amphip., v.1t.4 f.2; 0.2 p.164 | 1891 O. p., G. ©. Sars, Crust. Norway, v.1 p. 107 t.37 £.1. 


‘Head, lateral angles acute. Side-plate 1 narrow, scarcely expanded 
below, 4% with hinder expansion obtuse, very slight. Pleon segment 3, 
postero-lateral angles with upturned point. Eyes much wider below than 
above, lärger in Ö than in O, red. Antenna 1 in 9, flagellum with 11 joints, 
15 equal to next 3 combined, accessory flagellum 4-jointed. Antenna 2 a little 
longer than antenna 1, flagellum 13-jointed. Both antennae in JS considerably 
longer than in O, flagella slender, with more joints. Gnathopod 1, 6! joint 
subequal to 5{t, palm nearly transverse but with corner rounded off. Gnathopod 2, 
6th joint more than half as long as 5tk, a little dilated distally. Peraeopods 
3—5, 4 joint very robust, 24 of peraeopod 5 much‘ longer than rest of 


limb. Uropod 3 with no spinules on either ramus. Telson. rounded oval, 


ineised for "/, of length, apices rather narrow, ee Colour reddish 
yellow to light brown. L.8 mm. 


Aretie Ocean; North-Atlantie and North-Sea (West-Norway); Skagerrak (Bohuslän). 


3. O. normani (O.Sars) 1891 & 95 Onesimus n., (Schneider in MS.) G.O. Sars, 
Crust. Norway, v.1 p. 106 t.36 f.2; p.686 | 1893 Anonyx n., A. Della Valle in: F. Fl. 
Neapel, v.20 p. 827. 

Head, lateral angles acute. Side-plate 1 scarcely expanded below, 
4'!h with hinder expansion short and blunt. Pleon segment 1, antero-lateral 
angles sharply uncinate, segment 3 with postero-lateral angles acutely uncinate. 
Eyes oblong oval, red. Antennae 1 and 2 in O short and stout; antenna 1, 
flagellum with 8 joints, the 1° large, accessory flagellum 3-jointed. Antenna 2, 
flagellum 8-jointed. Gnathopod 1, 6th joint scarcely or not longer than 5th, 
palm not curved, very oblique and spinulose, angle indistinet. Gnathopod 2, 
6‘ joint half length of 5t%, scarcely widening distally. Peraeopods 3—5, 
4th joint not robust, 24 of peraeopod 5 as long as rest of limb. Uropod 2, inner 
ramus constrieted. Uropod 3, rami without spinules. Telson a little longer 
than broad, ineised for rather more than '/, of the length, apices moderately 
broad, indented. Colour pure white, eggs in pouch reddish. L. 9 mm. 


Arctie Ocean (Tromsö, Finmark), Christianiafjord. 
4. O.turgidus (O.Sars) 1879 Anonyx (O.)t., G.O.Sars in: Arch. Naturv. Kristian., 


v.4 p.437 | 1885 O.£., G. O. Sars in: Norske Nordhavs-Exp., ©.6 Crust. 1 p. 147 t. 12 
f.5, 5a-i | 1893 Ahonyz plautus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 828. 


’ 


m u aan zul a m alle BE id nl al a ui udn 2 un 2 02 ul An zus last Bere 1 are ge 


Al ne and nel seh ner : an Nö en AD na En 2i rn Say) D muen 
+ mt Y gs ? 


Mn VeRBEER 
h m 


at ie 2 


Bl al un nn um a ni a 


il ln 
en i AHE ana u = 


Onisimus 27 


Body unusually tumid. Head, lateral angles acute. Side-plate 1 little 
‚expanded below, 4!h forming an almost recetangular eorner below the hinder 
emargination. Pleon segment 3, postero-lateral angles acutely uncinate. 
Eyes oval, the broad end below, rich vermilion in life. Antenna 1, peduncle 


‚tumid, flagellum with 10 joints, 1° very large, accessory flagellum with 4 joints, 


1% Jarge. Antenna 2, flagellum 7-jointed. Gnathopod 1 rather stout, 6!" joint very 
little longer than 5, palm rather oblique. Gnathopod 2, 6! joint (as figured) 
much more than half as long as 5", with a very small excavate palm. 
Peraeopods 3—5, 24 joint large, hind margin distinetly serrate, 4 joint 
only moderately broad. Uropod 3 without spinules. Telson short and broad, 
ineised ?/, of the length, apices broad. Colour whitish, faintly tinged with 
red. L. reaching 15 mm. 


Aretic Ocean (midway between Jan Mayen and Finmark). Depth 3220—3310 m. 


5. O. brevicaudatus H. J. Hansen 1886 O.b., H. J. Hansen in: Dijmphna 
Udb., p.216 t.21 f.7—7e | 1894 O.b. (part.), T. Stebbing in: Bijdr. Dierk., «17 p.12| 
1893 Pseudalibrotus littoralis (err., non Anonyx Il. Kreyer 1845!) (part.), A. Della Valle 
in: F. Fl. Neapel, v.20 p. 799. 


Head, lateral angles narrowly rounded. Side-plate 1 somewhat expanded 


below, 4 with a rather small expansion. Pleon segment 3, postero-lateral 


angles acutely upturned. Eyes on the projecting lobes of the head, narrowed 
above, almost triangular, not approaching summit of head. Antenna 1,flagellum 
in © with 11 joints, in S with 17, 1% large, accessory flagellum with 5 joints, 
1st long. Antenna 2, flagellum in © 15-, in C 24-jointed. Both antennae have 
calceoli in d. Gnathopod 1, 6" joint longer than 5t, palm oblique, finger pro- 
jeeting a little beyond it. Gnathopod 2, 6! joint in S with margins subparallel, 
hinder longer than front, finger fixed in middle of apical margin and celosing 
down on oblique palm; in © with margins diverging distally, hinder shorter 
than front, finger fixed near front angle and when closed leaving a gap between 
its eoncave margin and the excavate palm. Peraeopods 3—5, 4% joint 
moderately broad. Uropod 3 with spinules on the rami. Telson with breadth 
and length subequal, distal margin straight or faintly rounded or faintly 
emarginate. L. © 16:5, © 15°5 mm. 


Kara Sea (lat. 71° 13’N.). Depth 110 m. 


6. ©. caricus H. J. Hansen 1886 O. c., H. J. Hansen in: Dijmphna Udb., 
p-214 t.21 f.6| 1894 O.c., T. Stebbing in: Bijdr. Dierk., v.17 p. 11 | 1893 Anonyx 
edwardsii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 828. 


Head, lateral angles slightly projecting, broadly rounded. Side-plate 1 
considerably expanded below, 4!" with hinder expansion rather short, obtusely 
truneated. Pleon segment 3, postero-lateral angles produced upwards into a 
short blunt point. Eyes on the projecting lobes of the head, narrowed above, 
almost triangular, not approaching summit of head. Antenna 1, flagellum 
inO with 16 joints, 1° equal to 2 or 3 next combined, accessory flagellum 
4-jointed; flagellum in JS with 30 joints, 1° joint equal to 4 or 5 next combined, 
accessory flagelluın with 5 joints, 1% elongate. Antenna 2, flagellum in O 20-, in 
S 37-jointed. Maxillipeds with 3 spines on apical margin of outer plates, where 
other species appear to have only one. Gmnathopod 1, 6tk joint longer than 
5th, palm oblique, spinules fringing it and part of the hind margin. Gnatho- 
pod 2, 6th joint in both sexes rather more than half as long as 5, sub- 
triangular, expanding distally, front margin rather the longer, finger stout, 
leaving an interval between its concave margin and the excavate palm. 


28 ÖOnisimus, Cyphocaris 


Peraeopods 3—5, 4! joint moderately broad. Uropod 3 with spinules on 
both rami and setae on outer of ©. Telson scarcely longer than broad, 
distally somewhat narrowed, with a minute indent on each side of the 
shallow central emargination. L. @ 29, d 265 mm. 


Arctie Ocean. Depth 94—143 m. 


7. O. leucopis (©. Sars) 1879 Anonyxe (O.) l., G.O.Sars in: Arch. Naturv. 
Kristian., v.4 p.438 | 1885 O.1., G. O. Sars in: Norske Nordhavs-Exp., v.6 Crust. I p.149 
t.13 fl, 1a | 1882 Onesimus I, Hoek in: Niederl. Arch. Zool., suppl.1 nr.7 p.45 | 
1893 Anonyx edwardsii (part.), A. Della Valle in: F. Fl. Neapel, 0.20 p. 828. 


Head, lateral angles somewhat produced and pointed. Side-plate 1 
considerably expanded below, 4% scarcely at all. Pleon segment 3, postero- 
lateral angles acute, very slightly produced, not upturned. Eyes very small, 
imperfect, placed near lateral lobes of head, colour light, well-nigh lacteal. 
Antenna 1, flagellum with 11 joints, 1°! rather large, accessory flagellum long, 
4-jointed. Antenna 2, flagellum rather long, 16-jointed. Mouth-organs 
undescribed. Gnathopods 1 and 2, supposed to resemble those of O. turgidus 
(p. 26). Peraeopods 3—5, 4" joint rather short and thick. Uropod 3 without 
spinules. Telson short and broad, with central emargination. Colour whitish, 
semi-translucent. 1]. 10 mm. 


North-Atlantie (between Iceland and Norway). Depth 1520 m. 


8. O. affinis H. J. Hansen 1886 O..a., H. J. Hansen in: Dijmphna Udb,, 
p- 216 t.21 £.9, 9a | ?1894 O. brevicaudatus (part.), T. Stebbing in: Bijdr. Dierk., v. 17 
p.13 | 1893 Pseudalibrotus littoralis (err., non Anony«x I. Kreyer 1845!) (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p. 799. 


Head, lateral angles slightly projecting, rounded. Side-plate 1 rather 
expanded below, 4" with hinder expansion short, obtusely truncated. Pleon 
segment 3, postero-lateral angles produced to an upturned rather blunt 
process. Eyes short, somewhat triangular asin O. earicus (p.27). Antennae, gnatho- 
pod 1, peraeopods much as in O. edwardsii (p. 25). Gnathopod 2 almost as in 
OÖ. brevicaudatus J, 6!" joint broader than in O. edwardsii, not twice as long 
as broad, hind margin rather longer than front, a minute cavity between 
slightly outdrawn palm and the finger. Telson very little longer than broad, 
narrowing a little from base to apex, the latter subtruncate, in the middle 
a little emarginate with an indent on each side. Specimen not adult. 
L. 13°5 mm. 


Kara Sea. Depth 54 m. 


15. Gen. Cyphocaris Boeck 


1871 Cyphocaris (Sp. un.: ©. anony«&), (Lütken in MS.) A. Boeck in: Forh. Selsk. 
Christian., 1870 p. 103 | 1872 C., A. Boeck, Skand. 
Arkt. Amphip., v.1 p.140 | 1888 O., T. Stebbing in: 
Rep. Voy. Challenger, v. 29 p. 656 | 1893 C., J. Bonnier 
in: Bull. sei. France Belgique, v.24 p.174 | 1893 C., 
A. Della Valle in: F. Fl. Neapel, v.20 p. 846. 


Head direeted downward beneath the large 
segment 1 of peraeon (Fig. 6). Side-plates 1, 2 
and 3 very small, 4 and 5 large. Pleon segments 
large. Eyes none or unknown. Epistome not 
projecting in front of upper lip. Mandible, molar 


Fig. 6. C. challengeri. F x : 
Latatal view. prominent, denticulate, palp affıxed above it, large, 


rg 


be a 7 te Ball nn ı = = > 


a na ud 2 


alt ul 


RR ’ Bag 
ee Em rn le u u ll lau ul 2nn un LIT 2 aan: 


FE CE NV UELIERN; 


Nr Bl a la nnd di a cn 


2% 
er 
IR 


SER 


ai in 2 Koll ik rn FE Ti Se sl il a a ae en Mare 
Aue E 2 aan a a a 


ae hi an u in u urn Da ” 
wit A ar er 
Le 2 ER EEN" 
Ha 


S a Re 


Cyphocaris 29 


with joints 2 and 3 subequal. Maxilla 1, inner plate with 7 setae, outer plate 
with 11 spines, palp with 6 spine-teeth. Maxilla 2, inner plate broader than 
outer, nearlv as long, with setae on inner margin. Maxillipeds, inner plates not 
very long, with 3 apical spine-teeth, outer plates not large, fringed with spine- 
teeth, palp elongate. Gnathopod 1, feebly subchelate, 24 joint longer than rest 
of limb. Gnathopod 2 elongate. Peraeopods 3—5, 24 joint deeply serrate 
on hind margin. Uropod 3, rami subequal, long, lanceolate. Telson long, 
tapering, deeply cleft. 


2 species. 


Synopsis of speeies: 


Peraeopod 3, 2d joint produced into a long spur. . . . . 1. C. challengeri . p.29 
. Peraeopod 3, 2d joint not produced into a long spur. . . 2. C.anonyx . . . p.29 


1. C. challengeri Stebb. 1888 C.c., T. Stebbing in: Rep. Voy. Challenger, 
0.29 p. 661 t.17 | 1893 ©. c., A. Della Valle in: F. Fl. Neapel, v.20 p. 847. 


Top of head faeing forward, its proper front margin a little sinuous. 
Peraeon segment 1 as long as 39 and 4! combined. Side-plate 4 concealing 
the 34, with long irregularly bowed front and deeply excavate hind margin, 
5th much broader than deep. Pleon segment 3, postero-lateral angles 
squared, minutely produced. Antenna 1, 1° joint equal to 24 and 3% combined, 
flagellum with 15 joints, 1° as long as 1° of peduncle, accessory flagellum 
3-jointed. Antenna 2, ultimate joint of peduncle shorter than penultimate, 
flagellum 40-jointed. Gnathopod 1, 6!" joint a little narrower and longer than 
5th, narrowing distally, hind margin minutely pectinate, finger denticulate and 
toothed on inner margin. Gmnathopod 2, 5 and #'" joints longer than in 
gnathopod 1, 6% shorter than 5'%, palm small, well defined, finger curved. 
Peraeopods slender, except in 24 joint of peraeopods 3-5. Peraeopod 3, 
24 joint, front margin strongly bent, hinder cut into 7 teeth and prolonged 
sharply almost to end of 6'"%. Peraeopod 4, 24 joint almost triangular, 
with 14 teeth, much overlapping 34 joint. Peraeopod 5, 24 joint more oval, 
with 13 teeth, a little overlapping 34 joint. Uropod 3, rami long, almost 
equal, sliehtly armed. Telson cleft for ”'/, of the length, without lateral, 
but with a pair of apical spinules. L. about 7 mm. 


North-Paeifie (north of Sandwich Islands). 


2. C. anonyx Boeck 1871 C.a., (Lütken in MS.) A. Boeck in: Forh. Selsk. 
Ohristian., 1870 p.104 |! 1872 C. a., A. Boeck, Skand. Arkt. Amphip., v.1 p.141 t.6 
f£.1 | 1887 C. a, H. J. Hansen in: Vid. Meddel., ser.4 v».9 p.67 | 1888 (©. mieronyx, 
T. Stebbing in: Bep. Voy. Challenger, 0.29 p.#: 56 t. 16. 


Head partly concealed in overarching, rather sharply ee long 
1°° peraeon segment. Side-plate 4 more angular than in Ü. challengeri. 
Pleon segment 28, postero-lateral angles almost quadrate. Antenna 1, 1% 
joint longer than 24 and 3% combined, flagellum with 21—30 joints, 1° very 
long, accessory flagellum 5-jointed. Antenna 2, ultimate joint of ‚pedunele shorter 
than penultimate, flagellum 75-jointed. Gnathopod 1 nearly as in C. challengeri, 
6 joint not longer than 5th, Gnathopod 2, 6 joint oval, shorter than 
5th, both armed on hind margin with graduated sets of pectinate spines 
and long broad-ended setae, finger minute. Peraeopods 1 and 2 subchelate, 
the 6% joint being distally widened and having a palm margin set with 
teeth and spines, finger powerful, curved, acute. Peraeopod 3, 24 joint with 
front margin bent, hind margin cut into about 8 teeth, prolonged to end 


30 Cyphocaris, Cyclocaris 


of 5th joint, inner margin of process eut into about 7 teeth, end of limb- 
as in peraeopods 1 and 2. Peraeopod 4, 24 joint little produced behind, the 
hind margin divided into 11 teeth, joints 4, 5 and 6 longer than in peraeopod 3, 
palm narrower. Peraeopod 5, 24 joint with hind margin cut into 14 teeth, 
5th and 6th joints very elongate, no palm margin, finger nearly straight. 
Uropod 3, outer ramus with small 24 joint, inner not shorter than outer, 
both with plumose setae. Telson long, narrow. «left nearly ®/, of length, 
with 2 or 3 pairs of lateral spinules, and an apical pair. L. 14 mm. 

South-Paeifie (west of South America, depth 2700 m); South-Atlantie (Tristan 
da Cunha, depth 2565 m); North-Atlantie (Cape Farewell, depth 540 m). 


16. Gen. Cyclocaris Stebb. 


1888 Cyelocaris, T. Stebbing in: Rep. Voy. Challenger, v.29 p.664 | 1893 C., 
A. Della Valle in: F. Fl. Neapel, v.20 p. 843. 

Head deep. Side-plates 1 and 2 very small, 39 and 4th large. Antenna 1, 
peduncle very short. Mandible, eutting edge broad, simple accessory plate 
minute, molar weak or wanting, palp central (Fig. 7). Maxilla 1 with 
several plumose setae on inner plate, 11 spines on broad apex of outer plate, 
24 joint of palp long, quinque-dentate. Maxilla 2, inner 
plate much shorter than outer, inner margin setose. Maxilli- 
peds, inner plates with wide concave distal margin, outer 
plates broad and long, fringed with setae, spines and teeth. 
Gnathopod 1 simple, 3% joint much longer than 4'h, 5th 
longer and slightly wider than the long narrow tapering 6%, 
7th slender, Gnathopod 2 slender, 5t" joint much longer 
than 6%, which is also long and narrow, not tapering; 
7b joint small, thick at base, closing over short palm. 
Peraeopods 1 and 2 not very slender, side-plate of peraeo- 
pod 1 distally dilated, that of peraeopod 2 very. little 
Fig.7. C.tahitensis. excavate behind, 4% joint in each rather large. Peraeo- 

Maaßible. -pods 3—5 pretty strongly spined, 24 joint broadly expanded, 
4th very moderately. Uropod 2 with rami unequal, uropod 3 reaching far beyond 
uropod 2, the outer ramus the longer, with a small 24 joint. Telson long, 
narrow, tapering, cleft nearly- to the base, a spiniferous notch at each apex 
with the inner point the longer. 

2 species. 


Synopsis of species: 
Side-plate 1 distally narrowed . . ... 2... 20% R C. tahitensis . . p.30 
Side-plate 1 not distally narrowed . . . .....2.... C. guilelmi . . p.3l 


1. C. tahitensis Stebb. 1888 C. t., T. Stebbing in: Rep. Voy. Challenger, v.29 
p. 664 t. 18. 

Side-plate 1 distally narrowed. Pleon segment 3 with blunt angles. 
Eyes uncertain. Antenna 1, peduncle tumid, 24 and 34 joints very short; 
flagellum with 10.joints, 1° stout, as long as peduncle or as rest of flagellum; 
accessory flagellum with 6 joints, 1° long. Antenna 2, ultimate joint of 
peduncle a little longer than penultimate; flagellum 25-jointed. Mandible with 
a tooth at the top of eutting edge, and lower margin behind its lower angle 
slightly serrate (Fig. 7), molar obseure. Gmathopod 2, 5tk joint much longer 
than 34. Uropod 1, rami subequal. L. about 10 mm, 


Tropical Pacific (Tahiti). Taken in townet. 


Y Ä 9) 
2 vn BE Kor h a „ N k R 
a a RER, la HE Sl DE Ed un A ui 1 Ba ah Bun a nn Ei en 
N! ee , n bh ak ni r 4 3 
RIES EN * MOTe AR LPT TEEN UNE, 


Sc a Be he ae ne a a a an a 5 rn 


nd 


PUT 


Cyelocaris, Lysianella al 


: 2. C. guilelmi Chevreux 1899 C. g., Chevreux in: Bull. Soc. zool. France, 
v.24 p. 148 f.1—5. 
Body robust. Head with little recurved rostrum, lateral angles faintly 
indicated, post-antennal corners more salient, rounded. Side-plate 1 almost 
- rectangular, with spinule on lower margin, 24 rather larger, rounded below. 
Pleon segment 3, postero-lateral corners subacute. Eyes wanting. Lower 
 — —  Iip with lobes distally obliquely truncate. Mouth-parts in general form 
agreeing with €. tahitensis (p. 30), but mandible carrying a dentiform 
molar process, very elongate, curved at the extremity and furnished with 
a row of small setae. Gnathopod 1, 6'% joint rather stouter than in 
C. tahitensis, regularly tapering. Gnathopod 2, 5% joint little longer than 34, 
Uropod 1, inner ramus °/, as long as peduncle, outer notably shorter. 
Uropod 2, inner ramus a little shorter than peduncle, outer ?/, as long as 
inner. L. 11—12 mm. 


Arctie Ocean (Lofoten Isles).. Depth 1095 m. 


17. Gen. Lysianella 0. Sars 


1882 Lysianella (Sp. un.: L. petalocera), G. O. Sars in: Forh. Selsk. Christian., 
nr. 18 p.78 | 1890 L., G. O. Sars, Crust. Norway, v.1 p.50 | 1893 L., J. Bonnier in: 
Bull. sei. France Belgique, v. 24 p. 174 | 1893 L., A. Della Valle in: F. Fl. Neapel, 
2.20 p. 797. 


Body shorter and stouter in JS than in ©; side-plates deep, 4! 
strongly excavate behind. Antenna 1 stouter in J, 1% joint of flagellum 
large and setose in d, small in O, accessory flagellum long in both sexes. 
Antenna 2 alike in JS and ©, about as long as antenna 1, penultimate joint of 
pedunele oval, broadly laminar, densely furred on inner surface. Mouth- 
organs prominent below. Upper lip jutting out much in front of epistome. 
Mandible strong, molar small and weak, palp short, attached behind molar, 
its 34 joint the longest. Maxilla 1, inner plate tapering, with 2 setae, 
otherwise normal. Maxilla 2, plates narrow, armed at apices. Maxillipeds, inner 
plates acutely tapering, outer plates narrow oval, palp slender, 24 joint longer 
than 1°, 4b rather small. Gnathopod 1 subchelate, 5th and 6tk joints sub- 
equal, 7'% small. Gnathopod 2, tending to minutely chelate. Peraeopods 
1—5 slender. Peraeopods 3—5, 24 joint large, longer than broad. Uropod 3 
small, rami subequal, as long as peduncle, outer ramus 2-jointed, the 24 
about °/, as long as the 1%. Telson small, oval, entire or partially cleft 


2 species. 


Synopsis of species: 
ee ee en 1. L. petalocera . p.3l 
ar ER nie 2. L. dellavallei . p.32 


1. L. petalocera O. Sars 1882 L. p., G. O. Sars in: Forh. Selsk. Christian., 
nr.18 p.78 t.3 f.3,3a | 1890 L. p., G. O. Sars, Crust. Norway, v.1 p.dl t.18 f.2 | 1893 
.L.p., A. Della Valle in: F. Fl. Neapel, v.20 p. 797 t.61 £.9. 


Head, lateral corners subangular, less projeeting in J than in ©. 
- _ Pleon segment 3, corners obtusely rounded. Eyes oval, dark purplish brown 
- with reddish coating, larger in d. Antenna 1, flagellum 8-jointed, accessory 
- flagellum 4-jointed, 1° joint the longest; antenna 2, flagellum 8-jointed. 
-  Gnathopod 1, 6th joint of nearly uniform width, palm oblique, not very large, 
- finger short, simple. Gnathopod 2, 6tk joint about half length of 5, produced 


0‘ NE a IN > 
ae Ef 


32 Lysianella, Onesimoides 


at the tip, but not strongly. Telson not twice as long as broad, apex entire, 
evenly rounded. Colour whitish, intestine greenish, ova in pouch orange- 
coloured. L. © 5, C 3:5 mm. 


North-Atlantie, North-Sea and Skagerrak (South- and West-Norway). Down 
to 188 m. 


2. L. dellavallei Stebb.*) 1895 Anonyx petalocerus (non Lysianella petalocera 
G.O. Sars 1882!), A. Della Valle in: F. Fl. Neapel, «.20 p.816 t.61 £.1—9. 


Head, lateral angles rounded. Antenna 1 in Q, flagellum 9-jointed, 
accessory flagellum with 5 subequal joints. Antenna 2, flagellum 12- Jemen. 
Telson eleft a quarter of the length. L. 5 mm. 


Gulf of Naples. 


18. Gen. Onesimoides Stebb. 


1888 Onesimoides (Sp. un.: O. carinatus). T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.647 | 1893 O., J. Bonnier in: Bull. sei. France Belgique, v.24 p.174 | 1893 O,, 
A. Della Valle in: F. Fl. Neapel, ©. 20 p. 796. 


Head with small subacute lateral lobes. Side-plate 1 almost com- 
pletely clear of the head. Antennae 1 and 2 subequal, short, in antenna 1 
first joint of flagellum and of accessory flagellum long, 
the latter expanded over the former. Antenna 2, ultimate 
and penultimate joints of pedunele subequal. KEpistome pro- 
jeeting a little in front of upper lip. Mandible, molar 
denticulate, palp set just over it, with 1° joint not. very 
short, 24 long (Fig. 8). Maxilla 1, inner plate with 2 setae 
on the narrow apex, outer plate broad, obliquely truncate, 

. with 11 spines, palp with‘9 spine-teeth on long 24 joint 
in right, 12 in left maxilla. Maxilla 2, inner plate little 
shorter than outer. Maxillipeds, inner plates with 3 apical 
spine-teeth, outer plates reaching end of palp’s 24 joint, 
margin beset with teeth and spines, palp robust. 4% joint 
Fig.s. O.carinatus,. Unguiform, short. Gnathopod 1 subchelate, 5" joint short, 
Mandible. 6th robust, oblong, palm transverse, finger as long as palm, 

4th, 5th and 6t joints strongly setose on hind margin. 

Gnathopod 2 weak, minutely chelate, 6!" joint rather longer than broad, the 
minute finger in middle of apical margin. Peraeopods 1—5, 7t% joint short. 
Peraeopods 3—5, 24 joint expanded, in 5th oreatly, as long as broad. 
Uropod 3 short, outer ramus as long as peduncle, with a short 24 joint, 
inner ramus rudimentary. Telson short, as broad as long, rounded, apically truncate. 


1 species. 


1. O. carinatus Stebb. 1888 O.c., T. Stebbing in: Rep. Voy. Challenger, v.29 
p- 648 t.14 | 1893 O. c., A. Della Valle in: F. Fl. Neapel, 0.20 p. 796 t. 60 f. 59 —4l. 


Peraeon with all but chiefly last 2, and pleon with first 4 segments 
carinate, body furred; pleon segment 3, lower corners quadrate. Antenna 1, 
flagellum 12-jointed, accessory flagellum 4-jointed. Antenna 2, flagellum 

9-jointed. Side-plate 1 broader above than below. Uropod 1, rami unequal; 
uropod 2, rami subequal. L. 11—12 mm. 


Coral Sea (North-East-Australia). Depth 2560 m. 


*) Nom. nov. After Antonio Della Valle, 


F 
3 
; 
4 
E 
3 
E 
E 
r 
4 
b 
3 
E 
R 


\ 
; 
3 


a ala dB un u ala Bart be LS Sun Ze aa urn hd In a iin um lln aan ash et aa ar us alleine, ni Sn ln ei ’ ni 
> er ’ * ” 


Pseudalibrotus 33 


19. Gen. Pseudalibrotus Della Valle 


1871 Onisimus (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p. 112 | 1876 
Onesimus (part.), A. Boeck, Skand. Arkt. Amphip., v.2 p. 161 | 1893 Pseudalibrotus 
(Sp. un.: P. littoralis) (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.798 | 1896 P., 
G. O0. Sars in: Bull. Ae. St.-Petersb., ser.5 v.4 p. 422. 


Body rather slender and compressed. Side-plates not very large, 4th 
pair deeply but narrowly emarginate behind. Antenna 1 and 2, with many 
short joints in the flagella both of S and oO. Epistome not distinctly 
defined from upper lip, both together forming a rounded prominence. Lower 
lip with front lobes a little emarginate distally. Mandible, molar rather 
strong, palp large, set well forward. Maxilla 1, inner plate small with 
2 setae, outer plate broad, obliquely truncate, palp with small apieal teeth. 
Maxilla 2, inner plate much shorter than outer. Maxillipeds normal, outer 
plates crenulate, not reaching end of 24 joint of palp, 1°—34 joints of palp 
robust, 4! small, unguiform. Gnathopod 1 subchelate, 6!" joint a little 
longer than 5th, oblong, palm oblique, 7% joint simple. Gnathopod 2, 6th 
joint about half length of 5t", slender, oblong, more or less produced, sub- 
chelate or chelate. Peraeopods 3—-5, 24 joint large, longer than broad. 
Uropod 3, rami longer than pedunele, outer rather the longer. Telson 
short, broad, entire. 

3 species. 

Synopsis of species: 

1 | Gnathopod 1 very robust .... 2... 2. 1. P.litoralis. . . p.33 


Gnathopod 1 not very robust — 2. 
Pleon segment 3, postero-lateral corners considerably 


9 BE en a a 2. P. caspius . . . p.34 
Pleon segment 3, postero-lateral corners scarcely 
ee BR eg NER Ta 3. P. platyceras . p.34 


1. P. litoralis (Kreyer) 1845 Anonyx I, Kreyer in: Naturh. Tidsskr., ser. 2 
v.1 p.621 | 1846 A. littoralis, Kreyer in: Voy. Nord, Crust. t.13 f.1a-t | 1862 Alibrotus I,, 
Bate, Cat. Amphip. Brit. Mus., p.86 t.14 f.7|1891 A.l., G. ©. Sars, Crust. Norway, 
v.1 p.102 t.35 £.2 | 1894 A. Titoralis, T. Stebbing in: Bijdr. Dierk.. 0.17 p.9 | 1866 
Lysianassa l., Go&s in: Öfv. Ak. Förh., v.22 p.521 | 1871 Onisimus l., A. Boeck in: 


 Forh. Selsk. Christian., 1870 p.112 | 1875 O.1l., Cam. Heller in: Denk. Ak. Wien, »v.35 


p-31 t.2 1.8—16 | 1876 Onesimus l., A. Boeck, Skand. Arkt. Amphip., ©.2 p. 162 t.5 
f.7 | 1893. Pseudalibrotus littoralis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 799. 


Head, lateral lobes narrowly rounded, little prominent. Side-plate 1 
much expanded distally. Pleon segment 3, postero-lateral angles minutely 
outdrawn, almost quadrate. Eyes small, rounded oval, red. Antenna 1, 
18 joint more than twice as long as 24 and 39 combined, flagellum in © with 
26 joints, 1° much the largest, accessory flagellum with 5 joints, 1% as long 
as the rest combined. Antenna 2, ultimate joint of peduncle shorter than pen- 
ultimate, flagellum in oO about 30-jointed. Flagella in J rather longer than 
in O and with many more joints. Gmathopod 1 strong, 5t% joint distally broad, 
6% hroadly oblong, palm spinulose, with 2 spines at the angle. Gnathopod 2, palm 
minutely produced. Peraeopods 1 and 2, 6tk joint slightly eurved. Peraeo- 
pods 3—5, 5tk and 6 joints slender. Uropod 2, inner ramus constrieted. 
Uropod 3, outer ramus with small 24 joint and setose on inner margin. 
Telson rounded, scarcely longer than broad, distal border faintly emarginate 
in -the centre, carrying two spinules.. Colour whitish. L. 13—18 mm. 


Arctic Ocean (North-Norway). 
Das Tierreich. 21. Lief.: T. R. R, Stebbing, Amphipoda I. 3 


34 Pseudalibrotus, Nannonyx 


E 
FE 
E 
E 
X 


2. P. caspius O0. Sars 1896 P. ce. (Onesimus ce. + O. pomposus, OÖ. Grimm in 
MS.), G. O. Sars in: Bull. Ac. St.-Petersb., ser.5 0.4 p.422 t.1 £.1—20. 


Body rather stout, back strongly curved. Head, lateral lobes narrowly 
rounded. Side-plate 1 distally expanded, much broader than 24 or 34, Pleon 
segment 3, postero-lateral angles acute, considerably produced. Eyes rather small, 
rounded oval, probably bright red. Antenna 1, 1° joint large, flattened, twice 
as long as 24 and 34 combined, flagellum about twice as long as peduncle, with 
16 joints, 1° much the largest, with 5 faseicles of filaments, accessory flagellum 
with 4 joints, 1% much the longest. Antenna 2 rather longer, ultimate joint of 
peduncle not very long, narrower and shorter than penultimate, flagellum longer 
than in antenna 1, about 20-jointed. Mouth-parts nearly as in P. litoralis, but 
palp of mandible attached‘over molar, not in advance of it, palp of maxilliped 
less robust. Gnathopod 1 not robust, 6*" joint scarcely as broad as 5tt, somewhat 
narrowing distally, palm rather short, with single spine at the angle, finger small. 
Gnathopod 2 very slender, 6 joint produced so as to form a little definite chela. 
Peraeopods 1—5 shorter and less slender than in P. litoralis. Peraeopods 3—5, 
24 joint with few serrations on the hind margin. Uropods 1 and 2, rami simple, 
with scattered spines. Uropod 3, pedunele rather short, rami simple, with 
no 24 joint to outer ramus. Telson about as long as broad, apex slightly 
produced between a pair of notches, each of which carries a setule. L. 9 mm. 1 


Caspian Sea, middle part. Depth 150-470 m. 


3. P. platyceras O.Sars 1896 P. p. (Onesimus p. O. Grimm in MS.), &. O. Sars 
in: Bull. Ac. St.-Pätersb., ser.5 v.4 p.426 t.1 f.21—23. 


Very like P. caspius, but twice as long and more tumid, back broadly 
rounded, pleon segment 4 with marked dorsal depression. Head, lateral 3 
lobes subangular. Side-plate 1 comparatively broader than in P. caspius. | 
Pleon segment 3, postero-lateral corners acute, but very little produced. | 

E 


4 - Wi a ne A De A an 


ae 


x 
REN Eee a 


he 


Eyes narrowed above to an obtuse point. Antenna 1, 1° joint exceedingly 
large, conspieuously flattened, flagellum rather slender, with 30—40 joints, 
accessory flagellum with 6 joints. Antenna 2 scarcely longer, flagellum 
34-jointed. Gnathopod 1, 6t joint rather shorter in proportion to its breadth, 
palm less oblique. L. Q 20 mm. 


{ 

Caspian Sea, middle part. Depth 75 m. 
j 

’ 


20. Gen. Nannonyx 0. Sars 


1871 Orchomene (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p. 114 | i 
1890 & 91 Nannonyx (Sp. un.: N. goesii), G. ©. Sars, Crust. Norway, v.1 1.24; p.71| 3 
1893 N., J. Bonnier in: Bull. sei. France Belgique, v.24 p.173 | 1893 N., A. Della 
Valle in: F. Fl. Neapel, v.20 p. 79. 


Body compact, side-plates large. Mandible elongate, molar obsolete, i 
palp affıxed far back. Maxilla 1, inner plate with 1 or 2 small setae, i 
plumose or simple. Maxilla 2, both plates long, narrow. Maxillipeds, inner 
plates generally elongate, narrow, outer plates long and broad, glightly erenulate, 
reaching beyond the 24 joint of palp, 4 joint of palp distine® but rudimentary 3 
in size. Gnathopod 1 simple. Gmathopod 2 minutely chelate. Uropod 3 \ 
very small, the outer ramus the longer, 2-jointed. Telson entire. 

5 species, 


Synopsis of species: 


Sr a ER a N 


1 { Maxillipeds, inner plates not elongate or narrow 1. N. spinimanus . . p.35 
Maxillipeds, inner plates elongate, narrow — 2. 


ln Sala ae a he wa de 7 na a ae rl ee hi 
sh DEN ET ME ER : 


a N Te a. 


ia As a Sri A al DE ade Dee ln pen Alle A a a nn 


DEE a nal al un 0 NER EN 
“ f - ar 4 e" x 


Nannonyx i 35 


Uropod 3, outer ramus with 2d joint econspieuous 2. N. integriecauda. . p.35 
Uropod 3, outer ramus with 2d joint minute — 3. 


3 | Side-plate 4 little expanded backward .. . . . 3. N.goösii . .. . . p- 36 
Side-plate 4 greatly expanded backward — 4. 

j u H Pleon segment 3, angles acutely upturned . . . 4. N.thomsoni . . . p.36 

Pleon segment 3, angles rounded . . . .... BEN. Bidderi.‘.........D.86 


1. N. spinimanus A. Walker 1895 N. s., A. O. Walker in: P. Liverp. biol. 
Soe., v.9 p.292 t.18 f. 1—11; t.19 f. 6a. 


Pleon segment 3, postero-lateral angles rather acute with the point 
blunt, hind margin straight, serrate, 4{h segment with prominent rounded 
hump. Antenna 1, flagellum 7-jointed, accessory flagellum 4-jointed. Antenna 2, 
flagellum in S and 9 5-jointed, shorter than pedunele. Mandible with broad 
eutting edge. Maxilla 1, inner plate with 2 setae, outer plate broad, apex 
decurrent. Maxilla 2, inner plate twice as broad as outer. Maxillipeds, inner plates 
not reaching beyond 1° joint of palp, outer plates with spine-teeth fringing inner 
margin, 4% joint of palp very small. Gnathopod 1, 5!" and 6% joints stout, 
6% little longer than 5tk, tapering distally more in JS than in 9, leaving a 
small palm margin. Gmathopod 2 subchelate, 6% joint rather shorter than 
5th and nearly as wide. Peraeopods 3—5, 24 joint expanded, 4t" in peraeo- 
pods 3 and 4 wider and more produced than in peraeopod 5. Uropods 1.and 2, 
rami shorter than peduncles. Uropod 3, outer ramus in J rather shorter 
than peduncle, in © about half as long as peduncle, inner ramus ovate. 
Telson as broad as long, distally narrowed and rounded, carrying a pair of 
marginal spinules.. Colour brown. L. 45 mm. 


Menai Strait [North-Wales]. 


2. N. integrieauda (Stebb.) 1888 Ambasia i., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p. 695 t. 26. 


Side-plate 1 distally somewhat, 4!" very considerably, expanded. Pleon 
segment 3, postero-lateral angles outdrawn into a little blunt point; 4th 
without perceptible dorsal depression. Antenna 1, 24 joint half length of 1%, 
flagellum 5-jointed, shorter than 1° joint of: pedunele, accessory flagellum 
2-jointed. Antenna 2 (9?), last 3 joints of pedunele nearly equal, flagellum 
small, with 4 joints, the first the longest. Mandible, 1° joint of palp rather 
long. Maxilla 1, inner plate distally rounded, with one simple seta, outer 
plate with 11 spines, palp carrying 4 spines on apex of 24 joint. Maxilla 2, 


_ plates subequal, not very narrow. Maxillipeds, inner plates long, narrow, with a 


few small setae and perhaps 3 tooth-spines on the apex, outer plates reaching 
halfway along 34 joint of palp, 4% joint of palp very small, the nail forming 
half its length. Gnathopod 1, 5t" and 6th joints subequal, very scantily armed, 
not very long, 6t* joint tapering, without palm. Gnathopod 2, 39 joint as long 
as 5th, 6th half length of 5t". Peraeopod 1 slender, 7b joint rather elongate. 
Peraeopods 3—5,: 24 joint expanded, overlapping 34, 4th not very broad. 
Pleopods, peduncle broad, each ramus only 4-jointed, the outer with an extremely 


- broad 1° joint, 1° joint of inner narrow. Uropod 3, the short outer ramus 


subequal in length to the peduncle, its 24 joint nearly as long as the 1, 
inner ramus more than half length of outer, each with inner margin serrulate. 
Telson tapering to a rounded apex. L. 3 mm. 
Royal Sound [Kerguelen Island]. Depth 50 m. 
3*+ 


36 Nannonyx 


3. N. goösii (Boeck) 1871 Orchomene g., A. Boeck in: Forh. Selsk. Christian., 
1870 p.116 | 1872 & 76 O. g., A. Boeck, Skand. Arkt. Amphip., v.1 t.4 f.5; v.2 p.177| 
1890 & 91 Nannonyx g., G. O. Sars, Crust. Norway, v.1 t.24 f.3; p.72 | 1895 N. g,, 
A. Della Valle in: F. Fl. Neapel, v.20 p. 794. 


Back broadly rounded. Head with lateral angles broadly rounded- 
Side-plates deep, 4!" deeply but .not widely emarginate behind, 5t% rather 


deeper than broad. Pleon segment 3, postero-lateral angles quadrate, hinder 


edge faintly erenulate, segment 4 with hump-like dorsal projection. Eyes 
oval, dark brown. Antenna 1, 1° joint twice length of 24 and 34 combined, 
flagellum short, of 4 joints, 1° as long as other 3 combined, accessory flagellum 
2-jointed. Antenna 2 in O, ultimate joint of .peduncle shorter than either 
penultimate or antepenultimate, flagellum short, 4-jointed. Mandible, 1° joint 
of palp very short. Maxilla 1, inner plate slender, with single simple seta 
on the acute apex, palp without apical spines. Maxilla 2, plates very narrow. 
Maxillipeds, with many diverging setae about the base, inner plates elongate, 
outer large and long, minutely erenulate, 4 joint of palp very small, knoblike. 
Gnathopod 1 powerful. none of the joints long, 4*h, 5th and 6th joints densely 
setose, 5!" and 6" subequal in length, 6!" tapering, 7!" very small. Goatho- 
pod 2, 34 joint as long as 5tb, 6th very narrow, about half length of the 
5th and narrower. Peraeopods 1—-5 short and stout, 7t" joint very small. 
Peraeopods 3—5, expansion of 24 joint overlapping 34, 4th joint rather wide. 
Uropod 3 very small, rami shorter than peduncle, outer nearly twice as long 
as inner, its second joint minute. Telson rounded quadrangular, apex truncate 
(notched, Boeck). Colour yellowish, with transverse orange bands. Eggs in 
pouch dark violet. L. Q 4 mm. 


Aretie Ocean, North-Atlantie and North-Sea (West-Norway). Shallow water to 75m. 


4. N. thomsoni Stebb.*) 1879 Lysianassa kröyeri (err., non Ephippiphora 


kroyeri A. White 1847!), G. M. Thomson in: Tr. N. Zealand Inst., v.11 p. 237. 


. $Side-plate 1 considerably expanded below, 4 very greatly. Pleon 
segments 3, 4 and 5 slightly carinate, the postero-lateral angles of 3% acutely 
upturned. Eyes elongate. Antenna 1, 24 and 34 joints not extremely short, 
flagellum of few joints, all short. Antenna 2 in 9, ultimate and penultimate 
joints of peduncle subequal, flagellum 7-jointed; in J flagellum rather long and 


slender. Mandible, molar linear, 1° joint of palp rather long. Maxilla 1, inner » 


plate with minute seta on narrowly rounded apex, outer plate with 11 spines, 
2% joint of palp apparently unarmed. Maxilla 2, inner plate rather the broader, 
obliquely truncate. Maxillipeds as in N. goösii, but little 4!" joint of palp has a 
minute nail. Gnathopod 1 not especially stout, 6% joint tapering, without palm, 
rather longer than 5t". Gnathopod 2, 34 joint as long as 5tk, 6tk not narrower 
than 5", more than halfaslong. Peraeopods 1 and 2, 4" joint long, 7b moderately 
small. Peräeopods 3—5, expansion of 24 joint overlapping 34, 4th rather 
wide. Pleopods narrow. Uropod 3, with inner ramus almost rudimentary, 
the outer with small 24 joint and not longer than peduncle. Telson very 
small, rather broader than long, sides slightly converging, apex truncate. 
L. 8 mm. 


South-Paeifie (Dunedin [New Zealand)). 


5. N. kidderi (S. 1. Sm.) 1876 Lysianassa k., (S.I. Smith in:) Kidder in: Bull. 
U. S. Mus., v.3 p. 59. 


*) Nom. nov. After George Maleolm Thomson. 


E 
a. 
4 
. w 
4 


a Be a A a PS a nn es drin 


Ye Er ee ad BE 7 


alu a mn Di read, u) a 


eh EP na nes 


ie A nn. 


Nannonyx, Lysianassa 37 


Head, lateral angles quadrate, slightly rounded. Side-plate 1 very 
slightly expanded below, 4 greatly, the emargination strongly quadrate. 
Pleon segment 3, angles rounded. Antenna 1, 24 and 34 joints short, 
flagellum with 6 or 7 joints, accessory flagellum with 4 joints. Antenna 2, 
ultimate and penultimate joints of peduncle rather short, flagellum in © with 
7 or 8 joints, in J stout, with 18 short joints, most with calceoli. Mouth- 
organs nearly as in N. thomsoni, but 24 joint of mandible-palp not so long. 
Maxilla 1, 2 very minute setae on inner plate. Terminal joint of maxillipeds 
showing no nail. Gnathopods 1 and 2, and peraeopod 3 nearly as in N. thomsoni. 
Branchial vesicles almost simple. Uropod 3 very short, one branch. bluntly 
conical, the other rudimentary. Telson as broad as long, sides slightiy 
converging, apex slightly concave. L. 3—4 mm. 


Southern Indian Ocean (Kerguelen Island). Rocky beaches. 


21. Gen. Lysianassa M.-E. 


1830 Lysianassa*) (part.), H. Milne Edwards -in: Ann. Sei. nat., v.20 p. 364 | 
1840 Callisoma (nom. nud.), ©. G. Costa, Fauna Reg. Napoli; Crost., Cat. p.5 | 1851 
C. (non L. Agassiz 1846, Öoleoptera!) (part.), A. Costa, Fauna Reg. Napoli, fasc. Marz. 
1851 p.1 | 1855 Lyeianassa, T. Bell in: Belcher. Last Arct. Voy., v.2 p.406 | 1867 
Subgen. Lysianassina, A. Costa in: Annuario Mus. Napoli, v.4 p.43 | 1888 Lysianax 
(part.), T. Stebbing in: Rep. Voy. Challenger, v.29 p. 681. 1676. 

Body compressed. Side-plates large. Antenna 1, 24 joint longer than 
usual in this family. Antenna 2 short in Q, long in d. Upper lip defined 
by a narrow ineision and produced forward to a large linguiform plate. 
Mandible slender, ceutting edge simple, molar very ‚small, palp attached 
. behind it, 1° joint not very short.” Maxilla 1, inner plate without setae, 
outer plate with erowded spines, palp eut into small teeth at apex. Maxilla 2, 
inner plate much broader than outer. Maxillipeds, inner plates normal, outer 
oval, without spines, minutely crenulate, palp long and slender. Gnathopod 1 
simple. Gmnathopod 2 subchelate or almost chelate. Peraeopods 1—5 rather 
slender. Peraeopods 3—-5, 24 joint broadly expanded. Branchial vesicles 
with accessory folds on one side only. Uropod 2, with one ramus con- 
strieted. Uropod 3 not very small, rami narrowly lanceolate one-jointed, 
setose only in d. Telson small, entire or minutely notehed. 


7 species accepted, 3 doubtful. 


Synopsis of accepted species: 
j Telson entire — 2. 
\ Telson minutely notehed — 6. 
f Pleon segment 3 wneinate . » >... 2.2... 1. L. plumosa . . . p.38 
\ Pleon segment 3 not uneinate — 3. 
j Telson apically trüncate — 4. 
\ Telson apically rounded — 5. 


1 


„m 


4 | Antenna 1, 1st joint bidentate ....... ... 2. L. bispinosa. . . p.38 
Antenna 1, 1st joint smooth . ....: 2.2.2... 3. L. cubensis . . . p.38 
5 | RRFTRER 2 tending to chelate . »..:.... 4 L. longicornis . . p.39 
Gnathopod 2 simply subehelate . . . .. 2... 5. L. cinghalensis . p.39 
Peraeopod 3, 2d joint rounded . ...:..... 6. L. variegata. . . p.39 

6 | Peraeopod 3, 2d joint narrow proximally, expanded 
& N EEE N SP ET EEE Pe I 7. L. punctata . . . p.40 


*) 2 HM name Lysianassa is not preoceupied by G. Münster (efr.: 1846, Herrmannsen, 
Ind. Gen. Malae., v.1 p. 637). . The Editor. 


38 Lysianassa 


1. L. plumosa Boeck 1861 L. costae (err., non H. Milne Edwards 1830)), 
Bate & Westwood, Brit. sess. Crust., ©.1 p. 74 f. | 1865 L. e., W. Lilljeborg in: N. Acta 
Soe. Upsal., ser.3 v.6 nr.1 p.21 | 1890 L.c., G. O. Sars, Crust. Norway, v.1 p.42 t.16 
f.1 | 1871 L. plumosa, A. Boeck in: Forh. Selsk. Christian., 1870 p.96 | 1872 L.p. + 
L. costae, A. Boeck, Skand. Arkt. Amphip., v.1 p.116 t.3 £.5; p.118 t.4 f.1 | 1893 
Lysianax septentrionalis, A. Della Valle in: F. Fl. Neapel, v.20 p. 788, 


Head, lateral angles produced, acuminate. Side-plates close set and 
deep, 4! deeply and widely emarginate behind. Pleon segment 3, postero- 
lateral angles sharply uncinate. Eyes broadly reniform, dark purplish. 
Antenna 1, flagellum with 10—12 joints, about as long as pedunele; accessory 
flagellum 3- or 4-jointed. Antenna 2 in 9 searcely longer than antenna 1, ante- 
penultimate joint of pedunele rather long, ultimate and penultimate subequal in 
length, flagellum with 8 joints. Antenna 2 in C longer than the body, ante- 
penultimate joint of peduncle short, ultimate twice as long as penultimate, 
flagellum filiform, with 60—70 joints. Gnathepod 1, 18! joint as long as rest of 
limb, 6" joint narrow, tapering, slightly longer than 5tk, 7tk small. (The 
subsigmoid shape attributed .by Boeck to the hand of gnathopod 1 in his 
single S specimen cannot be relied on as a normal character.) Gnathopod 2, 
6th joint short, truncate or slightly excavate, forming a small palm. Peraeo- 
pods 1 and 2 with very lang plumose setae on the 4" joint in d. Telson 
oval, apically rounded, much shorter than peduncle of uropod 3. L. 12 mm. 


North-Atlantieand North-Sea (West-Norway, Great Britain, France). Down to 188m. 


2. L. bispinosa (Della Valle) 1893 Lysianax bispinosus, A. Della Valle in: 
F. Fl. Neapel. 0.20 p. 792 t.1 f.5; 1,25 f. 16—21, 


Head with lateral lobes little prominent. Side-plates not very deep. 
Pleon segment 3, postero-lateral angles rounded. Eyes brown. Antenna lin Q, 
1° joint distally produced into two unequal teeth. Antenna 2, ultimate and 
penultimate joints of pedunele tolerably large. Maxillipeds, outer plates reaching 
a little beyond 24 joint of palp. Peraeopod 3, 24 joint rounded. Telson 
subreetangular, distal margin straight. The other characters as in L. longi- 
cornis. Colour white, with brown spots, besides tints of orange and scarlet 
due to the internal organs, the appendages chalk-whitee L. 10 mm. — d 
unknown. 


Gulf of Naples. 


3. L. eubensis (Stebb.) 1897 Lysianax c., T. Stebbing in: Tr. Linn. Soe. 
London, ser.2 ©.7 p.29 t. 7». 


Head, lateral angles broadly rounded. Side-plate 1 expanded below, 5% 
broader than deep. Pleon segment 3, postero-lateral angles almost quadrate, 
but with convex hind margin. Eyes large, oval, dark. Antenna 1, 1° joint 
not produced into apical teeth, flagellum small, of 6 or 7 joints, none long, 
accessory flagellum 2-jointed. Antenna 2 in O very small, peduncle slender, 
flagellum imperfect. Gnathopod 1, 5!" and 6tk joints subequal in length. 
Gnathopod 2, 6% joint more than twice as long as broad, bulging a little 
distally, transversely truncate, subchelate, finger minute, closely fitting the 
palm. Peraeopod 3, 24 joint broader than long. Peraeopod 4, 24 joint 
with convex front, sinuous hinder margin. Peraeopod 5, 24 joint large, 
oval. Uropod 2, inner ramus much dilated, and towards the end strongly 
and abruptly constrieted. Uropod 3 short, pedunele stout, rami subequal, 
slight. Telson boat-shaped, with truncate hind margin. L. 7'5 mm. 


Gulf of Mexico or Caribbean Sea (Cuba).? 


TEEN WR 


Lysianassa 39 


4. L. longicornis H. Luc. 1845/46 L. !., H. Lucas in: Expl. Algörie, An. 
artie., v1 p.53 Crust. t.5 f.2 | 1866 L. I. (part.), E. Grube in: Arch. Naturg., v. 821 
p. 896 t.9 f.8(8) | 1866 L. 1, Cam. Heller in: Denk. Ak. Wien, «. 26u p.17 t.2 
f£.12—15 | 1892 L. 1, A.O. Walker in: Ann. nat. Hist., ser.6 v.9 p.135, 136 | 1867 
Lysianassina 1. ++ ?L. filicornis, A. Costa in: Annuario Mus. Napoli, v.4 p.43 | 1893 
Lysianaz 1., A. Della Valle in: F. Fl. Neapel, v.20 p. 790 t.3 f.6; 1.25 f.1—15 | ?1853 
Lysianassa spinicornis, A. Costa in: Rend. Soc. Borbon., n. ser. v.2 p.172 | ?1857 L. s., 
A.Costa in: Mem. Ace. Napoli, v.1 p.185 t.1 f.4 | ?1857 L. loricata, A. Costa in: Mem, 
Ace. Napoli, v.1 p.186 t.1 f.5 | ?1862 L. filicornis, A. Costa in: Annuario Mus. Napoli, 
v.1 p.80 t.2 f.18—23 | ?1889 Lysianax ceratinus, A. O. Walker in: P. Liverp. biol. 
Soe., ©. 8 p.200 t.10 f.1—8 | 1899 L. e., Chevreux in: C.-R. Ass. Frane., Sess. 27 
0.2 p.476. 


Head, lateral angles produced, rounded. Side-plates close set, deep, 
1° a little widened distally. Pleon segment 3, postero-lateral angles rounded. 
Eyes broadly reniform, red. Antenna 1, 1° joint with inner distal margin 
produced into a spiniform process, varying from large to evanescent, 
22 joint about half length of first, or more, 39 short, flagellum with 10 joints, 
1° not long, accessory flagellum with 3—5 joints. Antenna 2, ultimate joint of 
peduncle much longer than penultimate in C, flagellum in d much longer 
than body. Gmnathopod 1, 5 joint a little shorter than 6th, 6th tapering, 
7th small. Gmathopod 2, 6! joint with distal hind margin prolonged into 
a kind of lobe, rough with spinules. Peraeopod 3, 24 joint elliptical, broader 
than long. Peraeopod 4, 24 joint with hind margin rather sinuous. Peraeo- 
pod 5, 24 joint very broad, but longer than broad. Uropods all with awl- 
shaped rami, more or less armed with spines. Telson elliptical, apically 
rounded. Colour grey dorsally. Side-plates rusty-yellow and greyish with 
scattered little white spots. Flagella of antennae cerimson. L. 8—10 mm. 


Mediterranean; North-Atlantic and North-Sea (Great Britain). 


5. L. einghalensis (Stebb.) 1897 Lysianax e., T. Stebbing in: Tr. Linn. Soe. 
London, ser.2 v.7 p.28 t.7a. 


Head, lateral lobes produced, the apices rounded. Side-plates 1 and 
4 distally much widened. Pleon segment 3, postero-lateral angles rounded. 
Eyes very large and dark, meeting on the top of the head. Antenna 1, 
15 joint tumid, 24 and 34 not extremely short. flagellum with 6 joints, none 
long, accessory flagellum with 3 joints. Antenna 2, as usual in Ö, flagellum 
35-jointed, slender, reaching about to middle of pleon. Maxillipeds, inner 
plates long, outer plates large but not reaching beyond 24 joint of palp. Gnatho- 
pod 1, 6tk joint slightly longer than 5%. Gnathopod 2, 34 joint as long as 
5th 6th rather more than half length of 5%, subchelate, minute finger 
elosing down on small transverse palm. Peraeopods 3—5, 24 joint broadly 
expanded, produced. below the 34 joint. Uropod 3, peduncle elongate, rami 
fringed with a few long setae. Telson much longer than broad, apically 
rounded. L. about 8 mm. 


Indian Ocean (Trincomali [Ceylon]). Surface. 


6. L. variegata (Stimps.) 1855 Anonys variegatus, Stimpson in: P. Ac. Philad., 


-©.7 p.394 | 1862 Lysianassa variegata, Bate, Cat. Amphip. Brit. Mus., p. 67 t.10 £. 7 | 


1888 Lysianax variegatus, T. Stebbing in: Rep. Voy. Challenger, v.29 p. 682 t. 23. 


Head, lateral lobes produced, rounded. Side-plate 1 distally widened, 
4th with lower expansion deep, not broad. Pleon segment 3, postero-lateral 
angles forming a minute tooth far upturned. Eyes large, reniform, very 
dark in spirit. Antenna 1, 1° joint tumid, 29 much longer than 34, flagellum 


40 Lysianassa, Perrierella 


8-jointed, accessory flagellum 4-jointed. Antenna 2 in ©, ultimate joint of 
peduncle slightly longer than penultimate, flagellum 8-jointed; in JS ultimate 
joint of peduncle twice length of penultimate, flagellum with 53 joints, calceoli on 
many of them. Mandible, palp set far back, 1° joint rather long. Maxillipeds, 
outer plates large, reaching beyond 24 joint of palp, 4" joint of palp very small. 
Gmnathopod 1, 6%" joint much narrower and slightiy longer than 5%. Gnathopod 2, 
34 joint rather longer than 5t", 6th oval, with convex palm. Peraeopods 1 and 2, 
4th and 5tk joints fringed with plumose setae. Peraeopod 3, 24 joint broad, 
rounded. Peraeopods 4 and 5, 24 joint somewhat produced downward. Branchial 
vesicles with large accessory lobes. Uropod 3, rami shorter than peduncle, 
broadly lanceolate, setose on opposed margins, the outer rather the longer. 
Telson little longer than broad, much shorter than pedunele of uropod 3, 
distally squared, with a small central notch. Colour yellowish mottled with 
brown, with scattered white dots.. L. 14 mm. 
Simon’s Bay [Cape of Good Hope]. Depth 33 m. 


7. L. punctata (A. Costa) 1840 Callisoma p. (nom:-nud.), O. G. Costa, Fauna 
Reg. Napoli, Crost., Cat. p.5 | 1851 C. punctatum, A. Costa, Fauna Reg. Napoli, fasc. 
Marz. 1851 p.4 t.8 f£.4—7 | 1851 (©. p., (A. Costa in:) F.W. Hope, Cat. Urost. Ital., 
p-23, 44 | 1893 Lysianax punctatus, A. Della Valle in: F. Fl. Neapel, v.20 p.789 t.6 
f.6; 1.25 f. 22-32. 

Head, lateral angles produced, rounded; Side-plate 4 greatly expanded 
below, expansion not deep, but very broad. Pleon segment 3, postero- 
lateral angles rounded. Eyes red-brown. Antenna 1 in ©, 1° joint tumid,. 24 
and 34 comparatively short, flagellum very short, 6- or 7-jointed, accessory 
flagellum 3-jointed. Peraeopod 3, 24 joint attached to a eleft in the side- 
plate, narrow above, greatly expanded below. Peraeopods 4 and 5, 24 joint 
produced downward below the 34. Telson elongate, subreetangular, distally 
with a shallow but rather wide notch. The rest as in L. longicornis (p. 39). 
Ground colour citron-yellow, with a generally red hue from very numerous 
scarlet ehromatophores; appendages colourless or greyish. L. © 6—7 mm. 

Gulf of Naples. Upon the pleon of Paguri laden with eggs, matching the 
colour of its resting-place. 


L. costae M.-E. 1830 L.c., H. Milne Edwards in: Ann. Sei. nat., v.20 p. 365 
6:I10:-8.47, 


L. 6-7 mm. 2. 
Gulf of Naples. 


L. nasuta Dana 1853 &55 L. n., J. D. Dana in: U. S. expl. Exp., v. 13u 

p. 915; t.62 f. 2a—m | 1893 Lysianax n., A. Della Valle in: F. Fl. Neapel, v.20 p. 793. 
L. 10 mm. ö 
Tropical Atlantie (Rio Janeiro [Brazil]). 


L. pilicornis Heller 1866 L. p., Cam. Heller in: Denk. Ak. Wien, v. 26u 
p.17 1.2 £. 16. 


L. 8-9 mm. (. 
Adriatie (Lesina). 


22. Gen. Perrierella Chevreux & E. L. Bouv. 


1892 Perrierella (Sp. un.: P. crassipes), Chevreux & E. L. Bouvier in: Bull. Soe. 
zool. France, v.17 p.50 | 1893 Ps, J. Bonnier in: Bull. sei. France Belgique, v.24 p.181 | 
1893 P., A. Della Valle in: F. Fl. Neapel, v.20 p.840 | 1895 P., G. ©. Sars, Crust. 
Norway, ®.1 p.677 | 1892 Puraristias (Sp. un.: P. audowinianus), D. Robertson in: 
P. nat. Hist. Soc. Glasgow, n. ser. v.3 p. 201. 


Perrierella, Normanion 41 


Body compact. Side-plates not large, 1° partly concealed. Both 
pairs of antennae short, pedunele of antenua 1 rather elongate. A deep groove 
between epistome and upper lip. Mandible stout, molar obsolete, 1° joint 
of palp very short. Maxilla 1, inner plate with 3 setae, outer with 7.(?) 
spines, palp with minute teeth and spines. Maxilla 2, plates rather short, 
inner the broader. Maxillipeds, inner plates minute, carrying 3 spines, outer 
elongate with spines on inner margin, palp only 3-jointed, not reaching 
beyond outer plate. Gnathopod 1, 6% joint rather longer than 5tt, oval, making 
an approach to a palm, so as to be weakly subchelate. Gnathopod 2 slender, 
elongate, subchelate or almost cbelate. Peraeopods 1—5 short and stout, 
4th joint rather broad, 6tk produced to a short tooth-like process. Uropod 3, 
peduncle short, rami short, outer rather the longer, 2-jointed. Telson entire. 

l species. 

1. P. audouiniana (Bate) 1857 Lysianassa a., Bate in: Ann. nat. Hist., ser. 2 
v.19 p.138 | 1862 L.a., Bate, Cat. Amphip. Brit. Mus., p.69 t.11 f.1 (exel. 1g) | 1889 
Lysianax audowinianus, A. OÖ. Walker in: P. Liverp. biol. Soe., v.3 p.203 t.10 f.9,10 | 
1890 Aristias audouiniana, Meinert in: Udb. Hauchs, v.3 p.152 t.1 f.1—6 | 1892 
Pararistias audowinianus, D. Robertson in: P. nat. Hist. Soc. Glasgow, n. ser. v.3 p.201 | 
1893 Perrierella audouwiniana, J. Bonnier in: Bull. sei. France Belgique, ©.24 p.175 
t.5 | 1895 P. a., G. O. Sars, Crust. Norway, v.1 p.678 t.ı f.2 | 1875 Aristias tumidus 
(err., non Anonyx t. Kreyer 1846!), Cam. Heller in: Denk. Ak. Wien, v.35 p.30 t.2 
f.1—7 | 1892 Perrierella crassipes, Chevreux & E. L. Bouvier in: Bull. Soe. zool. France, 
v.17 p.50 f. | 1893 P.c., A. Della Valle in: F. Fl. Neapel, v.20 p. 841. 

Head deep, lateral angles slightly produced. Side-plate 4 little emarginate 
behind. Pleon segment 3 at postero-lateral angles almost quadrate. Eyes large, 
irregularly oval, dark with chalky white coating. Antenna 1, 24 and 34 joints 
not very short, flagellum with 4 joints, 15 the longest, accessory flagellum 
2-jointed. Antenna 2, ultimate and penultimate joints of peduncle subequal, 
flagellum 4-jointed, much shorter than that of antenna 1. Palp of maxilla 1 
ends in 4 erenulate teeth (Chevreux & Bouvier), or in 3 spines and a serru- 
late margin (Robertson, Sars’ figure), or in 3 setae (Heller), or in 8 spinules 
(Bonnier). Maxillipeds, the palp has a tubereuliform 4" joint (Chevreux & 
Bouvier, contrary to Heller, Bonnier and Sars). Uropod 3 has the rami 
finely serrulate. Telson nearly twice as long as broad (Sars; not so long 
in Bonnier’s figure), narrows distally to a slightly emarginate apex. Colour 
yellowish (Sars), whitish slightly tinted with rose on the back (Chevreux), 
eggs pale green (Bonnier).. L. 2—4 mm. 

North-Atlantie, North-Sea and Kattegat (Great Britain, France, West-Norway); 
Mediterranean. Commensal in sponges. g i 


23. Gen. Normanion Bonnier 

1871 Normania (Sp. un.: N. quadrimana) (non G.S. Brady 1866, Ostracoda)), 
A. Boeck in: Forh. Selsk. Christian., 1870 p.119 | 1890 N., G. O. Sars, Crust. Norway, 
v.1 p.82 | 1893 N., A. Della Valle in: F. Fl. Neapel, v.20 p.796 | 1893 Normanion, 
J. Bonnier in: Bull. sei. France Belgique, v.24 p. 167, 173 | 1895 N., G. O. Sars, Crust. 
Norway, v.1 p. 674. 

Body compact, side-plates not very deep, 4*h little excavate behind. 
Pleon segment 3, postero-lateral angles rounded. Antenna 1 and 2 in O short, 
24 and 34 joints of antenna 1 not extremely short. Epistome not defined 


from upper lip. Mandible, molar weak, palp long, set far back, 1° joint 


short.‘ Maxilla 1, inner plate with 2 small apical setae, 24 joint: of palp 
broad. Maxilla 2, plates rather narrow, only apically armed. Maxillipeds, 
inner plates long and narrow, outer long and broad, unarmed, reaching much 


42 Normanion, Paratryphosites 


beyond the 3-jointed palp, of which the 24 joint is shorter than the 1#. 
Gnathopod 1 subchelate, 3% joint longer than 4th, 6th greatly expanded, 
broader than long, 7th as long as the breadth of 6tb. Gnathopod 2 minutely 
chelate. Peraeopods 1—5 slender. Peraeopods 3—5, 24 joint longer than 
broad. Branchial vesicles almost simple. Uropod 3, peduncle long, rami 
narrowly lanceolate, outer slightly the longer. Telson short, entire, rounded 


quadrangular. 
2 species. 
Synopsis of species: 
Gnathopod 1, process of 5th joint obtuse. ...... 1. N. quadrimanus . p.42 
. Gnathopod 1, process of 5th joint acaute . ...... 2. N. safsl: .. ...-. . Das 


1. N. quadrimanus (Bate & Westw.) 1868 Opis quadrimana, Bate & Westwood, 
Brit. sess. Crust., ©.2 p.503 f. | 1895 Normanion amblyops, &. O. Sars, Crust. Norway, 
v.1 p.674 t.1 £.1. 

Eyes large and confluent, visual elements imperfeetly developed, light 
reddish brown, slightiy areolated. Antenna 1, 1° joint not twice as long 
as 24 and 34 combined, flagellum with 6 joints, 1° rather long, accessory 
flagellum 4-jointed. Antenna 2 in C, ultimate joint of peduncle shorter than 
penultimate, flagellum 6-jointed. Gnathopod 1, 34 joint considerably longer 
than 4th, 5th with a comparatively short and obtusely rounded expansion, 6tk 
much broader than it is long, palm transverse, defined below by a dentiform 
projeetion with a comparatively small spine on each side, 7tk joint or finger 
rather slender and perfectly smooth. Telson, as figured, scarcely longer 
than broad. Body pellueid, pale yellowish with lateral orange patches. 
L. © 5°5 (Sars), about 3 mm (Bate & Westwood). 

Trondhjemsfjord. Parasitic on fish, from 370—-570 m. 


2. N. sarsi Stebb.*) ?1871 Normania qvadrimana (err., non Opis quadrimana 
Bate & Westwood 1868!), A. Boeck in: Forh. Selsk. Christian., 1870 p.120 | ?1872 & 76 
N. q., A. Boeck, Skand. Arkt. Amphip., v.1 t.6 f.3; v2 p.188 | 1890 N. q., G. O. Sars, 
Crust. Norway, v.1 p.33 t.13 f.1 | 1895 Normanion qvadrimanus, G. 0. Sars, Crust. 
Norway, v.1 p. 674. 

Head rather deep, lateral corners angular, only slightly projecting. 
Body somewhat compressed, back evenly vaulted. Eyes large, oval, visual 
elements unusually large, brownish, with orange-coloured evating. Antenna 1, 
flagellum with 5 joints, 1% of no great length, accessory flagellum slender, 
3-jointed. Antenna 2 in O , flagellum 4-jointed. In other respects antenna 1 and 2 
as in N. quadrimanus. Gnathopod 1, 34 joint a little longer than 4, 5th forming 
a narrow projecting lobe, 6t" a little broader than long, palm transversely 
truncated and armed below with 3 strong spines, 7* joint strongly serrate 
on concave margin. Telson a little longer than broad (Sars), broader than 
long (Boeck). Body whitish, pellueid, with yellowish intestine and dark 
bluish ovaries. L.5 (Sars), 4 mm (Boeck). 

North-Atlantie, North-Seaand Skagerrak (South- and West-Norway). Parasitieon fish. 


24. Gen. Paratryphosites Stebb. : 


1871 Hippomedon (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p. 102|1899 
Paratryphosites (Sp. typ.: Lysianassa abyssi), T. Stebbing in: Ann. nat. Hist., ser. 7 
v.4 p. 206. 


Pleon segment 3, postero-lateral angles acutely upturned. Antenna 1, 
1° joint of flagellum not very large, accessory flagellum small. Antenna 2, 


*) Nom. nov. After Georg Ossian Sars. 


Paratryphosites, Paronesimus 43 


ultimate and penultimate joints of pedunele subequal. Mandible, molar prominent. 
palp affıxed over it or a little in front, 24 and 39 joints subequal. Maxilla 1, 
inner plate carrying 5 setae, outer with the usual spines, palp broad at apex. 
Maxilla 2, with setae on inner margin of inner plate. Maxillipeds, outer plates 
reaching much beyond 24 joint of palp, with spine-teeth on straight inner 
margin. Gmathopod 1 subchelate, 6 joint shorter than 5*", of uniform 
width, palm oblique, well defined, overlapped by finger. Gmnathopod 2 sub- 
chelate, 5th joint distally widened, 6 a little more than half as long. 
Peraeopods 3—5, 24 joint large, serrate on hind margin, 4 expanded in 
34 and 4th pairs, 4th pair the longest. Uropod 3, rami with many spinules, 
outer the longer. Telson little longer than broad, cleft scarcely reaching 
the middle, dehiscent, each apex carrying 5 spinules. 


1 speeies. 


1. P. abyssi (Go&s) 1866 Lysianassa a., Go&s in: Öfv. Ak. Förh., v.22 p.519 
t.37 £.5 | 1871 Hippomedon a., A. Boeck in: Forh. Selsk. Christian., 1870 p.103 | 1872 
H.a., A. Boeck, Skand. Arkt. Amphip., v.1 p.138 | 1890 H.a., G.O.Sars, Crust. Norway, 
e.1 p.56 | 1893 Euryporeia? a., A. Della Valle in: F. Fl. Neapel, v.20 p.848 | 1899 
Lysianassa a., Paratryphosites sp. typ-, T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p.206. 


Head, lateral angles acute. Eyes oval, red. Antenna 1, 1° joint long, 
eylindrical, not produced, flagellum with 10—12 joints, accessory flagellum with 
3 subequal joints. Antenna 2, flagellum 22-jointed. L. reaching 17 mm. 


Aretie Ocean (north of lat. 68% 36' N.) Depth 38—528 m. 


25. Gen. Paronesimus Stebb. 
1894 Paronesimus (Sp. un.: P. barentsi), T. Stebbing in: Bijdr. Dierk., v.17 p. 14. 


Side-plate 1 not expanded below, 4! only slightly, lower hind margin 
obliquely truncate. Antenna 1, 1% joint tumid, 24 and 34 very short. Antenna 2, 
ultimate joint of peduncle much shorter than penultimate; flagella of both pairs 
short in ©. Mandible, molar not very strong, palp attached over the molar, 
much longer than trunk, 1° joint short, 34 subequal to 24. Maxilla 1, 2 setae 
on inner plate, 11 spines on outer, 4 or 5 spine-teeth on long 24 joint of palp. 
Maxilla 2, inner plate narrower than, much more than half as long as outer. 
Maxillipeds, 3 teeth on inner plates, outer plates with minute teeth on inner 
margin and 1 spine on apical, 39 and 4th joints of palp rather elongate. 
Gnathopod 1, 6" joint longer than 5%, its slightly curved oblong narrowed 
distally, forming a very short palm not in line with insertion of the short 
finger. Gnathopod 2, 34 joint as long as 5*", 6 much more than half as long 
as 5th, widening gradually to a sinuous palm, "zen joint strongly eurved. Peraeo- 
pods 1 and 2, 24 joint stout, rather short, 4!" rather large. Peraeopods 3—5, 
24 joint much longer than broad, 4*h rather broad. Uropods 1—3, rami not 
elongate. Uropod 3, rami short, smooth, the outer the longer, with a small 
24 joint. Telson au times as long as broad, cleft for nearly half its length. 


1 species. 
1. P. barentsi Stebb. 1894 P.b., T. Stebbing in: Bijdr. Dierk., v.17 p.14 t.2. 


Pleon segment 3, postero-lateral angles forming small upturned point. 
Antenna 1 in ©, flagellum, 1° joint much larger than next, accessory flagellum 
4-jointed. Antenna 2 in O, flagellum 10-jointed. Telson with a spinule in each 
of the slightly divergent apices. L.? 


Arctie Ocean (lat. 76° N., long. 54° E.) Depth 125 m. 


44 OÖrchomene 


26. Gen. Orchomene Boeck 


1871 Orchomene (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p. 114 | 1876 
O., A. Boeck, Skand. Arkt. Amphip., v.2 p.171 | 1890 O., G. ©. Sars, Crust. Norway, 
v.1 p.59 | 1893 O., J. Bonnier in: Bull. sci. France Belgique, v.24 p.174 | 1873 Orchomena, 
E. v. Martens in: Zool. Ree., v.8 p.188. 


Side-plates large. Pleon segment 3, postero-lateral angles not produced, 
generally serrate. Antenna 1, flagellum in S with calceoli, accessory flagellum 
well developed (Fig.9). Antenna 2 in ©, antepenultimate joint of pedunele long, 
flagellum short, in C flagellum long filiform, with calceoli. Epistome projecting 

Flagellum Accessory flagellum roundly in front of upper. lip. Mandible long, 
molar very small, palp slender, set far back. 
Maxilla 1, 2 setae on inner plate, outer with 
apex scarcely oblique, palp with spine-teeth not 
numerous. Maxilla 2, both plates long, narrow, 
‚setiferous only apically. Maxillipeds, inner plates 

Fig. 9. O. serrata. elongate, outer long oval, weakly crenulate, palp 
Ben Da tr 8 9 Dre] not very large. Gnathopod 1 short, stout, sub- 
chelate, 6% joint longer than distally widened 5*t, with distinet transverse 
palm, finger short, eurved. Gmathopod 2 slender, 6t% joint narrow, produced 
beneath the minute finger. Peraeopods 3—5, 24 joint very large. Uropod 3 
in © scarcely reaching beyond uropod 2, in SG much larger and plumose. 
Cleft of telson not always reaching the centre. 


6 species. 


Synopsis of species: 


Pleon segment 3, hinder edge coarsely serrate — 2. 
1 2 Pleon segment 3, hinder edge finely serrate or 
smooth — 8. 


u 


j Pleon segment 4 with evenly rounded carina . O. serrata . . . p.44 
\ Pleon segment 4 with cariua ending acutely. . . . 2. O. pectinata . . p.45 
3 j Eyes dark — 4. 

\ Eyes not dark — 5... 


2 


4 j Pleon segment 3, hind margin‘ minutely erenulate 3. O.batei. . . . p.45 
\ Pleon segment 3, hind margin perfeetly smooth . . 4. O.hanseni. . . p.46 
Head, lateral angles acute, greatly projecting . 5. O. crispata. . . p.46 

Head, lateral angles quadrate, slightly projecting. . 6. O. amblyops. . p.46 


1. O.serrata (Boeck) 1861 Anonyx serratus, A. Boeck in: Forh. Skand. Naturf., 
Mode 8 p.641 | 1893 A. s., A. Della Valle in: F. Fl. Neapel, «.20 p.819 | 1871 Orcho- 
mene s. (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.115 | 1872&76 O.s., A. Boeck, 
Skand. Arkt. Amphip., v.1 t.5 f.2; 0.2 p.172 | 1890 & 95 O. s.,, G. O. Sars, Crust. 
Norway, v.1 p.62 t.23 f.1; p.682 t.IV £.1. 


Head, lateral angles considerably projeeting and obtuse. Pleon segment 3, 
lateral angles quadrate, with their hind margin straight, coarsely serrate, forming 
16—20 points, 4? segment with evenly rounded dorsal carina behind the depression. 
Eyes narrow oval, tapering above in ©, broad oval ind. Antenna 1 (Fig. 9), 
flagellum with 8 joints, 1° very large, especially in JS, accessory flagellum 
6-jointed. Antenna 2, flagellum 6-jointed in oO, little longer in J, but with 
8 joints, 3 carrying calceoli. Gnathopod 1, 6®* joint of nearly uniform breadth, 
nearly twice as long as 5tk, which is equal to 4th. Peraeopods 3— 5, 24 joint 
subequal in length to rest of limb. Uropod 3 alike in Q and JS, inner ramus 


Orchomene 45 


shorter than basal joint of outer, armed with 3 spinules. Telson broadly 
ovate, tapering distally, with 3 pairs of dorsal spinules, cleft narrow, reaching 
about to centre. Colour yellow or ochraceous. L. © 10, @ about 6 mm. 


Arctie Ocean, North-Atlantie and North-Sea (Norway). Depth 56—188 m. 


2. O. pectinata O. Sars 1882 O. pectinatus, O. pectinata, G. O. Sars in: Forh. 
Selsk. Christian., nr. 18 p.80 t.3 £.5, 5a; p.120 | 1890 & 95 O. pectinatus, O. pectinata, 
G. O. Sars, Crust. Norway, v.1 p.64 t.23 f.3; p.682 | 1893 Anonya pectinatus (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 820. 


Head, lateral angles projecting, acute. Side-plate 1 dilated below. 
Pleon segment 3, postero-lateral angles scarcely rounded, their hind margin 
curved, with coarse and sharp upturned serration of 12—16 points, 4% segment 
with high carina ending acutely. Eyes narrow, slightly sigmoid, visual elements 
imperfectly developed; almost eream-eoloured. Antenna 1 inQ, flagellum with 
13 joints, 1° Jarge, accessory flagellum 7-jointed. Epistome greatly projecting, 
evenly rounded. Gmnathopod 1, 6!" joint not much longer than 5th, a little 
tapering. Uropod 3, inner ramus as long as basal joint of outer, carrying 
4 spinules. Telson small, with 2 pairs of small dorsal and a pair of apical 
spinules, cleft reaching nearly to centre, very dehiscent. Colour pale greyish - 
white. L. oO 12 mm. 


Arctic Ocean, North-Atlantie and North-Sea (West-Norway). Depth 226 m. 


3. O. batei O.Sars ?1853 Lysianassa humilis, A. Costa in: Rend. Soe. Borbon., 
n. ser. v.2 p.172 | 1893 Anonyx h. + A. goesiü, A. Della Valle in: F, Fl. Neapel, v.20 
p. 817 t. 26 £. 52—37; p. 273, 920 | 1895 A. h., Sowinski in: M&m. Soc. Kiew, v.14 
p- 250 t.4 £.15—18; t.5 f. 1—7 | 1857 A. edwardsüi (err., non Kreyer 1846!), Bate in: 
Ann. nat. Hist., ser. 2 v.19 p.138 | 1861 Lysianassa longicornis (part.) (err., non H. Lucas 
1845/46!) + Anonyx edwardsi, Bate & Westwood, Brit. sess. Crust., v.1 p.85 (figure of 
animal and pleon only); p.94 f. | 1882 Orchomene batei,; G. O. Sars in: Forh. Selsk. 
Christian., nr. 18 p.81 | 1890 O.b., G. O. Sars, Crust. Norway, v.1 p.60 t. 22. 


Head, lateral angles projecting, broadly rounded in O, narrow linguiform 
in d. Side-plate 5 broader than deep. Pleon segment 3, postero-lateral angles 
almost quadrate, with hinder margin minutely erenulate, dorsal depression of 
4th segment stronger in J than in O0. Eyes oval, slightly reniform, dark 
reddish brown, much larger in Ö than inoO. Antenna 1, flagellum with 8 joints, 
1° large, accessory flagellum with 5 joints, 1% of moderate length. Antenna 2 
in Q, ultimate joint of pedunele shorter than penultimate, scarcely as long as 
antepenultimate, flagellum 9-jointed; in S, ultimate joint of peduncle stout, full 
as long as penultimate and longer than antepenultimate, flagellum reaching the 
full length of the animal“ Epistome narrow linguiform, projeeting much. 
Gnathopod 1 short and stout, 6% joint not greatly longer than 5%, distally 
tapering. Gnathopod 2, 6% joint very narrow, oblong linear, minutely produced, 
‚ the spiny armature unusually coarse. Uropod 3 in Q ‚inner ramus shorter than 
basal joint of outer, mucroniform, without spinules; in S, both rami long, 
and densely setose. Telson in © oblong quadrangular, scarcely tapering, about 
once and a half as long as broad, with 2 pairs of marginal spinules, 
cleft very short and wide, about one fourth of total length; telson in S more 
than twice as long as broad, with 3 or 4 pairs of spinules, cleft much 
narrower, nearly a third of the length. Body eream-coloured, each segment 
of peraeon with a reddish speck at the hind corners. L. © 7, d 8 mm. 


North-Atlantie, North-Sea and Skagerrak (South- and West-Norway, Great Britain, 
France). Depth 838—76 m. 


46 Örchomene 


4. O. hanseni Meinert ?1867 Anonyx melanophthalmus, A. M. Norman in: 
Rep. Brit. Ass., Meet. 36 p.201 | 1890 Orchomene hanseni, Meinert in: Udb. Hauchs, 
v.3 p.154 t.1 f.18—24 | 1895 O. h., G. O. Sars, Crust. Norway, v.1 p.681 t. III £.2. 


oO. Head, lateral angles somewhat projecting, narrowly rounded. Side- 
plate 5 rather broader than deep. Pleon segment 3, postero-lateral angles 
narrowly rounded, with hind margin perfectly smooth. Eyes unusually large, 
oblong oval, widened below, almost black. Epistome narrowly rounded and 
less projeeting than in O. batei (p.45). Antennae and limbs not distinguishable 
from those of O. batei, except that in gnathopod 2 the spines of the 6 joint 
are less coarse. Uropod 3, inner ramus simple, much shorter than outer. 
Telson about once and a half as long as broad, with a single pair of marginal 
spinules, eleft very short and angular, wider than deep. Colour uniformly 
whitish. L. 7—8 mm. — © unknown. 


Christianiafjord, Kattegat, North-Atlantie (Hebrides). Depth 14—90 m. 


5. O. erispata (Goös) 1866 Lysianassa e., Gods in: Öfv. Ak. Förh., 0.22 p.519 
t. 37 £.3 | 1890 Orchomene crispatus, G. O. Sars, Crust. Norway, v.1 p.63 1.23 f.2 | 
. 1893 Anonyax ce. A. Della Valle in: F. Fl. Neapel, v.20 p.819 | 1871 Orchomene serratus 
(part.) (err., non Anonyx s. A. Boeck 1861!), A. Boeck in: Forh. Selsk. Christian., 1870 
p-115 | 1882 O.s., G. ©. Sars in: Forh. Selsk. Christian., nr. 18 p.81. 


Head, lateral angles greatly produced, acute. Side-plates very deep, 
1° much overlapping the head, 4! as deep as broad. Pleon segment 3, 
postero-lateral angles rounded, with hind margin straight, finely serrated, 4 
segment without dorsal projection. Eyes oblong linear, reddish brown 
with light orange coating. Antenna 1, 1° joint unusually narrow, almost 
as long as rest of antenna, flagellum with 9 joints, 1° not long, accessory 
flagellum 6-jointed. Epistome broad, little projeeting, obtusely truncate at 
tip. Gnathopod 1, 34 joint conspieuously longer than 4, 6tk much longer 
than 5th, sliehtly tapering to the transverse palm. Peraeopods 3—5, 24 joint 
much expanded, peraeopod 5 almost quadrate, Uropod 3, rami unusually 
broad. Telson short and broad, less than once and a half as long as broad, 
with 2 pairs of marginal spinules, cleft dehiscent, not quite reaching the 
centre. Body somewhat flesh-coloured. L. Q 12 mm. 


Arctic Ocean; North-Atlantie and North-Sea (West-Norway). Depth 188—376 m. 


6. O. amblyops 0. Sars 1890 & 91 O.a., G. ©. Sars, Crust. Norway, v.1 p.65; 
t.25 f.1 | 1893 Anonyx pectinatus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.820. 


Head, lateral angles quadrate, slightly produced. Side-plate 1 expanded 
below. Pleon segment 3, postero-lateral angles sligehtly rounded, their hind 
margin convex, serrate with 14—16 distinet points, 4!" segment with triangular 
dorsal projeetion ending obtusely. Eyes recurved below, visual elements 
imperfectly developed, light orange with white reticulation. Antennae as 
in O.serrata (p.44). Epistome as in O. erispata, much less prominent than in 
OÖ. pectinata (p.45). Gnathopod 1, 6!" joint considerably longer than 5t%, Uropod 3, 
inner ramus shorter than basal joint of outer, which carries 3 feathered 
setae on inner margin. Telson not once and a half as long as broad, 
with 3 pairs of marginal spinules, cleft gently dehiscent, about reaching 
the centre. Colour whitish, tinged in front with yellow. L. © 8 mm. 


North-Atlantie and North-Sea (West-Norway). Depth 188—376 m. 


Socarnoides 47 


27. Gen. Socarnoides Stebb. 


1888 Socarnoides (Sp. un.: S. kergueleni), T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.690 | 1893 S., A. Della Valle in: F, Fl. Neapel, v.20 p.793 | 1890 Socarnioides 
(laps.), Beddard in: Zool. Rec., v.25 Index p.15. 


"Body compact, side-plates rather large. Antenna |, peduncle stout, 

24 and 34 joints not extremely short, flagellum of few joints. Antenna 2 
geniculate, ultimate joint of peduncle shorter than penultimate. Epistome 
projecting rather beyond upper lip, separated by deep ineision. Lower 
lip with narrowed lobes and mandibular processes divergent. Mandible 
narrowly elongate, cutting edge simple, molar weak, palp of moderate length, 
attached far back. Maxilla 1, inner plate without setae, outer carrying 
11 spines, palp with 1° joint very short, 24 large, somewhat tapering, 
without spines or teeth, but slightly serrate. Maxillipeds, inner and outer 
plates long, scantily armed, the outer extending far along 34 joint of palp. 
Gnathopod 1 not subchelate, 7 joint small. Gmathopod 2 minutely chelate. 
Peraeopods 3—5, 24 joint greatly expanded, especially in peraeopod 5. 
Uropod 2, shorter than uropod 1, rami subequal, inner with spiniferous 
constrietion. Uropod 3, shorter than uropod 2, peduncle produced into 
a dentiform process, rami not long, outer the longer, with small 24 joint. 
Telson small, narrowing distally, eleft not reaching the centre, dehiscent. 


2 species. 


Synopsis of species: 


Maxillipeds, outer plates obtusely pointed . . » 2»... 1. S. kergueleni . p. 47 
Maxillipeds, outer plates apically rounded . .. » 2... 2. 8. stebbingi . - p.47 


1. S. kergueleni Stebb. 1888 8. k., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.691 t. 25. ; 


Head, lateral angles rounded, projecting. Side-plate 1 not distally 
produced forward. Pleon segment 3, postero-lateral angles rounded. Eyes 
large, reniform. Antenna 1, flagellum with 8 joints, 1° not very large, accessory 
flagellum 4-jointed. Antenna 2, geniculate between penultimate and ante- 
penultimate joint of peduncle, ultimate of peduncle shorter than penultimate, 
flagellum 7-jointed. Maxillipeds, outer plates large, with apex obtusely pointed, 
1 seta on inner margin. Gmnathopod 1, 6tk joint tapering, narrower and 
slightly longer than 5tk, 7th joint small. Gmathopod 2, 6th joint slender, 
much shorter than 5%, the thumb shorter than the small finger, thus making 
a rather imperfect chela. Peraeopods 1—5, 4 joint rather broad. Peraeo- 
pod 3, 24 joint almost round, scarcely as large as the side-plate. Peraeo- 
pod 5, 24 joint very large, as long as rest of limb. Uropod 3, inner ramus 
not much shorter than outer. L. about 7 mm. 


Southern Indian Ocean (Kerguelen Island). "Depth 54—230 m. 


2. S. stebbingi (G.M. Thoms.) 1893 Lysianax® s., G.M. Thomson in: P. R. 
Soe. Tasmania, 1892 p. 19 t.3 £.9—18; t.5 £.9, 10. 


d. Closely agreeing with S. kergueleni in most respects, though in a few 
rather strikingly different. Side-plate 1 large, in figure very large, distally 
produced forward. Antenna 1, flagellum about 10-jointed, accessory flagellum 
about 6-jointed. Antenna 2, genieulate between ultimate and penultimate joints 


48 Socarnoides, Menigrates 


of peduncle, flagellum „long and many (30—40) jointed“, (number perhaps 
varying on the two sides). Maxilla 1 (in figure) single-jointed. Maxillipeds, 
outer plates large, apically rounded, 2 or 3 minute spines on inner margin 
below the middle. Uropod 3, inner ramus „short and quite rudimentary*. 
Telson doubtful. Colour nearly white. Integument very hard and brittle, 
without any markings. L. 6 mm. — O unknown. 


Pirates Bay [Tasmania]. In a rock-pool. 


28. Gen. Menigrates Boeck 


1871 Menigrates (Sp. un.: M. obtusifrons), A. Boeck in: Forh, Selsk. Christian., 
1870 p. 113 |] 1891 M., G. ©. Sars, Crust. Norway, v1 p.110 | 1894 M., T. er in: 
Bijdr. Dierk., v.17 p. 15. 


Body tumid, dorsally broad, side-plates rather large. Antennae 1 and 2, 
d and Oo, short, with few-jointed flagella, longer in JS than,in 9. Antenna 1, 
24 and 34 joints of peduncle very short, 1° joint in each flagellum rather 
long. Epistome not distinetly defined from upper lip. Lobes of lower 
lip narrowly rounded, hind lobes little divergent. Mandible elongate, 
eutting edge simple, molar weak, palp of moderate length, attached far 
back. Maxilla 1, inner plate with 2 setae, outer obliquely truncate, carrying 
11 spines, palp with 6 spine-teeth on the apex. Maxilla 2, inner plate 
shorter than outer, obliquely truncate. Maxillipeds, inner plates well armed, 
outer large, reaching beyond the rather short 24 joint of palp, 4% joint of 
palp small. Gnathopod 1 not subchelate, 6!" joint longer than 5%, Gnatho- 
pod 2 elongate, subchelate. Peraeopods 3—5 short and robust, 24 joint 
greatly expanded, especially in peraeopod 5. Uropod 3 very small, quite 
unarmed, outer ramus the longer, with small second joint. Telson short 
and broad, deeply ineised, apices rounded. 


1 species. 


1. M. obtusifrons (Boeck) 1861 Anonyx o., A. Boeck in: Forh. Skand. Naturf., 
Mode 8 p.643 | 1871 Menigrates o., A. Boeck in: Forh. Selsk. Christian., 1870 p. 114 | 
1872 & 76 M. o., A. Boeck, Skand. Arkt. Amphip., v.1t.6 f.2; v.2 p.169 | 1891 M.o., 
G.O.Sars, Crust. Norway, v.1 p.l1l t.38 f.1 | 1894 M. o., T. Stebbing in: Bijdr. 
Dierk., v. 17 p. 15 | 1865 Anonyx brachycercus + A. obtusifrons, W. Lilljeborg in: 
N. Acta Soc. Upsal., ser.3 v.6 nr. 1 p.27 t.4 f.42—-49; p.32 | 1893 Ichnopus nugax 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 804. 


Head, lateral corners somewhat produced and angular. Side-plate 4 
little produced backward. Pleon segment 3, postero-lateral angles forming 
a short acutely upturned process. Eyes reniform, red. Antenna 1, 
flagellum 8-jointed in Q©, 13-jointed in JS, accessory flagellum 4-jointed. 
Antenna 2, flagellum 8-jointed in Q, 16-jointed in J; in C the joints of 
the flagella are broad, with large calceoli. Gmathopod 1 rather powerful, 
6% joint much longer than 5th, slightly curved, tapering, 7tk joint strong, 
curved. Gnathopod 2, 6th joint half length of 5, oblong oval, scarcely 
dilated distally. Peraeopods 3—5 with 24 and 4tk joints much expanded, 
the 24 most, the 4tı Jeast in the 5tk pair. Colour pale yellowish with faint 
reddish tinge in front. L. 13 mm. 


Arctie Ocean, North-Atlantic and North-Sea (West-Norway). Depth 36—183 m. 


Aristias ; 49 


29. Gen. Aristias Boeck 


1871 Aristias (Sp. un.: A. tumidus), A. Boeck in: Forh. Selsk. Christian., 1870 
p- 106 | 1890 & 95 A., G. O. Sars, Orust. Norway, © 1 p.47; p.675 | 1893 A., A. Della 
Valle in: F. Fl. Neapel, .v.20 p. 848. 

Body short and thick. Side-plates rather small, 1° almost concealed, 4 
very slightly excavate. Antenna 1 not very turgid, 24 joint not extremely short, 
1° joint of flagellum rather large. Antenna 2 in 9 shorter than antenna 1. 
Epistome scarcely projecting, defined by a small but distinet sinus. Lower 
lip, front lobes narrow, hind processes blunt. Mandible strong, eutting edge 
simple, molar narrow, prominent, acuminate, palp central. Maxilla 1 with 
5 or more setae on inner plate, outer plate very broad, palp normal. Maxilla 2 
with the plates divergent, inner very broad, outer much narrower. Maxillipeds, 
inner plates small, outer large, oval, 1°t joint of palp the largest.. Gnathopod 1 
rather robust, 6% joint tumid at base, tapering to an apex rather wider than 
the base of the finger. Gnathopod 2 slender, minutely chelate. Peraeopods 3—5, 
22 joint not greatly dilated. Uropod 3, outer ramus the longer, with small 
2° joint, Telson rather short, deeply cleft. 

5. species. 

‘ Synopsis of species: 

Er 3. inner ramus shorter than 1st joint of 
1: 


BRIAN ee 1. A.tumidus . ... . p.49 
| Uropod 3, inner vamus not shorter than 1st joint 

of outer — 2. 
o. JıEyes rudimentary 2... 0.2 2% TEL, 2. A.mierops . . . .p.89 
= 1. Eyes not rudimentary ——- 3. 
Velo eLaER 30 Abekbane} u. ee 3. A. commensalis. . p.50 

© 4 Telson not cleft to the base — 4. 

A f Antenna 1, accessory flagellum 5-jointed . . .» . 4. A. neglectus . . . p.50 
1 Antenna 1, accessory flagellum 2-jointed ... . . 5. A.megalops . . . p.5l 


1. A. tumidus (Kroyer) 1846 Anonyx t., Kreyer in: Naturh. Tidsskr,,. ser. 2 
v.2 p.16,40 | 1846 A. t., Kroyer in: Voy. Nord, Crust. t.16 f.2 | 1887 Aristias t., H. J. 
Hansen in: Vid, Meddel., ser. 4 v.9 p.67 t.2 f.3—3b | 1890 A. t., G. O. Sars, Crust. 
Norway, v.1'p.49 t.18 f.1 | 1893 A. t., A. Della Valle in: F. Fl. Neapel, v.20 p:846 | 
1884 Menigrates arctieus, Orchomene? a., J. S. Schneider in: Tromse Mus. Aarsh., v.7 
p-63 t.1, 2. 
..... Head, lateral corners bluntly rounded, not projeeting. Pleon segment 3, 
lateral angles quadrate, margin faintly serrate. Eyes large, constrieted above, 
black. Antenna 1 in O, flagellum 8-jointed, accessory flagellum 4- or 5-jointed. 
Antenna 2 in ©, flagellum 7-jointed. Gmnathopod ‘1 rather short and. stout, 
6b joint with hind margin serrate, apically forming a minute palm. Peraeo- 
pods 1—5, 6% joint produced beneath the 7! to a short tooth-like process. 
Peraeopods 3—5, 4!" joint expanded and decurrent. Uropod 3, outer ramus 
rather large and dilated, 24 joint small, abruptly närrower, inner ramus little 
more than half as long as outer. Telson about as broad as long, narrowly 
«left beyond middle, not to base, with one spinule at each apex. Colour 
greyish white. L. 8 mm. 

"Aretie Ocean, Varangerfjord. Depth 110-140 m. 


2. A. mierops O.Sars 1895 A. m., G.O.Sars, Crust. Norway, v.1 p.675 t.1£.2. 


Head, lateral corners not produced, front edges nearly straight. Pleon 
segment 3, angularly produced at lateral corners (Sars, text, not figure). 
Eyes quite rudimentary, represented each by a small patch of opaque whitish 

Das Tierreich. 21.Lief.: T.R. R. Stebbing, Amphipoda 1. 4 


50 } Aristias 


pigment, without visual elements. Antenna 1 in Q, peduncle thick, flagellum 
not as long as pedunele, 5-jointed, accessory flagellum 2-jointed. Antenna 2, 
flagellunn much shorter than pedunele, 4-jointed. Gnathopod 1, 5 joint 
stout, 6% a little longer than 5t%, hind ‘margin serrulate, a small palm. 
Gnathopod 2, 6*% joint more than half as long as 5", narrowed. distallv. 
Uropod 3, rami rather short, spiniform 24 joint of outer abruptly narrower 
than 1° joint, inner ramus mucroniform, a little shorter than outer. Telson 
short and broad, cleft narrowly nearly to the base, with a spinule at each 
rounded apex. Body semi-pellueid, yellowish. L. © 3 mm. 
Trondhjemsfjord, Arctie Ocean (Nordland, very deep water; Tromsö). 


3. A. commensalis Bonnier 1896 A. c., J. Bonnier in: Ann. Univ. Lyon, 0.26 
p. 614 #.35 f.4. 

Body thick, compact. Head, lateral eorners slightly produced to obtuse 
apex. Side-plates not very large; pleon segments 1—3, postero-lateral corners 
subquadrate. Eyes round, remaining reddish in spirit. Antennae 1 and 2 short, 
equal. Antenna 1, flagellum with 6 joints, 1° very large, densely elothed, the rest 
small; accessory flagellum as long as 1° joint of primary, 5-jointed. Antenna 2, 
ultimate and penultimate joints of peduncle equal, flagellum with 10 joints, 
6 calceoli. Epistome carinate. Mandible, palp attached behind the molar. 
Maxillipeds, inner plates forming a little double erest, outer large, palp small, 
1°t joint broad, finger very short. Gnathopod 1, 5t% joint as long as 6th, 6th 
tapering, hind margin crenulate, finger small. Gnathopod 2, 5tk joint twice 6'%, 
6th with the minute finger forming a tiny chela. Peraeopods 1—5 tolerably stout. 
Peraeopods 3—5, 24 joint expanded, hind margin serrate. Uropod 1 spinose; 
uropod 3, inner ramus broad, with 3 spinules on distal part of outer margin, 
outer ramus longer, serrate on inner margin, with small 24 joint. Telson 
eleft to the base, with 1 or 2 pairs of marginal spines and 2 or 3 on the 
obtuse apices. L. S 10 mm. 

Bay of Biscay. Depth 800 and 960 m. On Pheronema grayi S. Kent, and Pteraster 
personatus P. Sladen. 


4. A. neglectus H. J. Hansen 1859 Anonyx tumidus (err., non Kroyer 1846!), 
R. M. Bruzelius in: Svenska Ak. Handl., n. ser. v.ö nr.1 p.41 | 1867 A. t., Cam. Heller 
in: Denk. Ak. Wien, 0.2611 p.25 t.3 f.6—12 | 1871 Aristias t., A. Boeck in: Forh. 
Selsk. Christian., 1870 p.107 | 1872 A. t., A. Boeck, Skand. Arkt. Amphip., v.1 p. 148 
t.3 f.4 | ?1861 Lysianassa ciliata, E. Grube, Ausfl. Triest, p.135 | 1887 Aristias neglectus, 
H. J. Hansen in: Vid. Meddel., ser.4 v.9 p.67 | 1893 A.n., A. Della Valle in: F. Fl. 
Neapel, v.20 p. 844 t.6 f£.9; 1.26 f. 16—31 | 1895 A. n., G. O. Sars, Crust. Norway, ».1 
p-675 | 1890 A. audouinianus (err., non Lysianassa audowiniana Bate 1856!), G. O. Sars. 
Crust. Norway, v.1 p.48 t.17 £.2. 

Head, with lateral corners almost reetangular and slightly produced. 
Pleon segment 3, lateral angles narrowly rounded, margin smooth. Eyes 
rounded oval, black with a whitish eoating. Antenna lin O , flagellum 10-jointed, 
accessory flagellum 5-jointed. Antenna 2 in Q, flagellum 9-jointed. Gnatho- 
pod 1, 6tk joint fully as long as 5tk, hind margin finely serrate, apically scarcely 
forming a palm. Gmathopod 2 long and slender, 6% joint about half length 
of 5th, Peraeopods 1-5, 6th joint produced to a short tooth-like process. 
Peraeopods 3—5, 4! joint” very little expanded. Uropod 3, outer ramus 
little longer or broader than inner. Telson longer than broad, eleft beyond 
middle, not to base, with rather wide ineision, 3 spinules at each apex. 
Colour corneous yellow, ovaries dark: bluish. L. 8 mm. 

Aretic Ocean, North-Atlantie, North-Sea, Skagerrak and Kattegat (South- and 
West-Scandinavia, Shetland Islands); Mediterranean. 


v 


Aristias, Ambasia ; öl 


5. A. megalops 0. Sars 1895 A. m., G. O. Sars, Crust. Norway, v.1 p.676 
t.II £.1. 

Head, with lateral corners slightly produced. Pleon segment 3, lateral 
corners acutely produced. Eyes very large, oblong oval, visual elements 
imperfeetly developed, pigment light reddish brown. Antenna 1 in Cd, peduncle 
4 rather long, flagellum 4-jointed, scarcely as long as peduncle, accessory 
3 flagellum 2-jointed. Antenna 2 in S, flagellum 4-jointed, half as long as 
Ei peduncle. Gnathopods 1 and 2 and peraeopods 1I—5 nearly as in A. microps 
 — (p. 49). Uropod 3, outer ramus eonsiderably longer than inner. Telson as in 
‚A. microps, but apices more truncate. Colour light yellowish. L. d 3 mm. 
= Perhaps the $ of A. mierops (p. 49). 

Trondhjemsfjord. Depth 565—753 m. 


30. Gen. Ambasia Boeck 


1871 Ambasia (Sp. un.: A. danielssenit), A. Boeck in: Forh. Selsk. Christian., 
FE 1870 p. 97 | 1890 A., G. O. Sars, Crust. Norway, v.1 p.45 | 1893 A., A. Della Valle in: 
2 F. Fl. Neapel, v.20 p. 805. 

Side-plate 1 partly concealed, 3 following large and deep. Antenna 1, 
1st joint tumid, 24 and 34 very short, flagellum with 1° joint very long, 
accessory flagellum subequal to peduncle in length. Antenna 2 in © scarcely 
longer than antenna 1. Epistome projeeting in front of upper lip as a large 
3 angular plate. Lower lip, mandibular processes narrow, divergent. Mandible 
strong, eutting edge broad, molar evanescent, palp behind the centre. Maxilla 1 
with 2 setae on inner plate, a small number of spines on outer, palp normal. 
Maxilla 2, plates nearly equal, apically spined. Maxillipeds, inner plates normal, 
outer large, elliptical, almost reaching end of palp, in which the 4tk joint 
is rudimentary. Gnathopod 1 slender, 6% joint shorter than 5t", tapering, 
not subchelate, finger small. Gnathopod 2 very slender, 6% joint about half 
2 length of 5t", long oval. Peraeopods 1—5, 7! joint very small. Peraeopods 
3—5, 24 joint well expanded. Uropod 3 rather short, outer ramus with 
y small 24 joint. Telson of moderate size, rather tapering, deeply_cleft. 


2 species. 


Synopsis of species: 


Uropod 3 with very unequal rami.. .. 2». .2... 1. A. danielssenii . . p.5l 
Timonod 8 with eauab rami ...... 00, en. 2. A.pulchra . . . . p.52 


1. A. danielssenii Boeck 1871 A. d., A. Boeck in: Forh. Selsk. Christian., 
1870 p.97 | 1872 A. d., A. Boeck, Skand. Arkt. Amphip., v.1 p.121 t.3 £.6 | 1890 
A. danielsseni, G. O. Sars, Crust. Norway, v.1 p.46 t.17 £.1 | 1893 A.d., A. Della 
Valle.in: F. Fl. Neapel, v.20 p. 805. 


Oo. Head, with lateral corners produced, almost quadrate. Pleon segment 3, 
postero-lateral angles ending in small upturned tooth, "above which the margin 
is broadly rounded; segment 4 with high compressed triangular expansion 
dorsally. Eyes narrow, deep, subsigmoid, visual elements imperfect, pigment a 
beautiful red. Antenna 1 in Q , flagellum 7-jointed, accessory flagellum 5-jointed, 
scarcely longer than 1° joint of primary. Antenna 2 in ©, ultimate joint of 

peduncle shorter than penultimate, flagellum 5-jointed. Gnathopod 1, 24 joint 

f rather dilated, shorter than rest of limb. Gnathopod 2 subchelate, tending to 

chelate. Uropod 3, inner ramus much the shorter. Colour dark purplish 
red in transverse bands of pigment spots. L. 13 mm. — | not known. 

Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (Norway). 


4* 


52 Ambasia, Ichnopus 


2. A. pulchra (H.J. Hansen) 1887 Tryphosa p., H.J. Hansen in: Vid. Meddel., 
ser.4 2.9 p.78 t.2 f.6—-6e | 1895 Ichnopus nugax (part.), A. Della Valle in: F. Fl. 
Neapel, 2.20 p. 804. 

Head, lateral angles little produced, almost quadrate. Pleon segment 3 
as in A. danielssenii, segment 4 not carinate. Eyes subreniform, very deep, 
rather narrow, yellowish (red in life). Antenna 1, flagellum with many joints, 
accessory flagellum with 8 joints. Antenna 2, ultimate joint of pedunele longer 
than penultimate, flagellum with many joints. Both antennae in C have the 
flagella more elongate than in 9; that of antenna 2 is very long. Upper 
hip (epistome?) with prominent, upturned, bluntly pointed process. Mouth- 
organs not described. Gnathopod 1, 24 joint not much dilated. Gnathopod 2 
subchelate. Peraeopods, 4 joint Tittle expanded. Uropod 3, rami equal in 
length. L. 15 mm. 


Arctie Ocean and North-Atlantie (West-Greenland). Depth 28.188 m. 


31. Gen. Ichnopus A. Costa 


1853 Ichnopus (Sp. un.: I. taurus), A. Costa in: Rend. Soc. Borbon., n. ser. v.2 
p. 169 | 1857 I., A. Costa in: Mem. Acc. Napoli, v.1 p.188 | 1890 I., G. O. Sars, Crust. 
Norway, v.1 p.39 | 1893 I. (part.), A. Della Valle 

in: F. Fl. Neapel, v.20 p. 800. 
Body rather slender and compressed. 
Flagella of antennae 1 and 2 with numerous 
brancnjaj Hort Joints, those of antenna 2 elongate in 
vesie adult S. Upper lip slightly projecting above, 
a small ineision between it and the epistome. 
Lower lip with narrow front lobes, the 
mandibular processes slender, very divergent. 
‘Mandible, eutting edge broad, simple, molar 
weak, palp large, central. Maxilla 1, inner 
plate small, outer broad, obliquely truncate, 
spines strong, palp normal. Maxilla 2, plates 
rather narrow. Maxillipeds normal, outer plates 
large, broadly rounded. Gnathopod 1 rather 
thin, not subchelate, 7% joint armed on 
concave margin with dense bunch of spinules. 
halopod ea 1}... „ Gmathopod. 2 elongate, subchelate (Fig. 10). 
Peraeopods 3—-5 successively longer. Bran- 
ehial : vesieles large, hipinnase with accessory lobes. Uropod 3,. rami rather 

large, lanceoläte, "outer 2-jointed. Telson deeply cleft. 
2 species. 


6 joint 


Synopsis of species: 
Gnathopod 1, finger not expanded at base... ...... 1. L spinicornis . p.52 
Gnathopod 1, finger expanded at base - ...2.... 2. Ltaurus. . . .:p.53 


1. L. spinicornis Boeck 1861 TI. s., A. Boeck in: Forh. Skand. Naturf., Mode 8 
p-645 | 1890 I. s., G.O. Sars, Crust. Norway, o©.1 p.40 t.15 | 1865 Lysianassa s., 
W. Lilljeborg in: N. Acta Soc. Upsal., ser.3 v.6 nr.1 p.20 | 1866 Ichnopus calceolatus, 
Cam. Heller in: Denk. Ak. Wien, v.2611 p.20 t.2 f. 26—28 | 1871 I. minutus, A. Boeck 
in: Forh. Selsk. Christian., 1870 p.99 | 1872 I. spinicornis + I. m., A. Boeck, Skand, 


Arkt. Amphip., ®.1 p.124 t.2 f.3; p.126 t.3 f.7 | 1893 I. taurus (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p. 801. 


Head, lateral corners somewhat projeeting and angular. Back rounded. 
Side-plates not very deep. Pleon segment-1 produced below in front 


we I 5 WERDE 


Khan 2 en U hd Ze 


En iin zn a a DE Fr re 


gi Li a a u 0 


Ichnopus, Anonyx 53 


into a short tooth, segment 3 with the hind corners toothed and upturned, 
and the margin above bowed out. Eyes 'reniform, larger in Ö, deep red. 
Antenna 1 in O0, about '/, length of body, longer in So, 1% joint "stout, with 
short but conspieuous dentiform process, 24 and 34 joints very short, flagellum 
in d with more than 60 Joints, none very large, accessory flagellum 10-jointed. 
Antenna 2, in 9 a little, in‘C much, longer than antenna 1, ultimate joint of 
peduncle scarcely shorter than penultimate. Both pairs of antennae in both 
sexes have numerous calceoli. Gmathopod 1, 6 joint slender, tapering, 
narrower but not much shorter than 5th, finger evenly curved, with bunch 
of delicate spinules on inner side of base (Sars), subapically strongly curved, 
and below armed with 6 or 7 pointed spinules (Heller). Gnathopod 2 nearly 
twice as long as gnathopod 1, 6!" joint oval, half as long as 5t*, not apically 
produced, finger minute on the centre of the hand’s apex (Fig. 10). Peraeo- 
pod 5 nearly twice as long as peraeopod 3. Uropod 2, the rami unequal, 
the inner the shorter, with a constrietion in which a spine is planted. 
Uropod 3, rami much longer than peduncle, outer the longer, with distinet 
terminal joint. Telson twice as long as broad, cleft beyond the middle, 
a spinule at each apex. Colour light greenish, a erimson tinge at each 
extremity. L. 12—17 mm. 

Arctic Ocean, North-Atiantie and North-Sea (West-Norway); Mediterranean; 
‚Java Sea (lat. 3° S., long. 107° E.). 


2. I. taurus A. Costa 1853 1. t., A. Costa in: Rend. Soc. Borbon., n. ser. v.2 
p.172 | 1857 1. t., A. Costa in: Mem. Ace. Napoli, v.1 p.189 t.1 £.3 | 1893 It. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p.801 t.3 £.1; t.27 £ 1-22 | 1866 Lysianassa 
longieornis (part.: Q, non Z!), E. Grube in: Arch. Natner: v.321 p. 396 t.9 f.8 | 1866 
Ichnopus affinis, Cam. Heller in: Denk. Ak. Wien, 2.2611 p.19 t.2 f.19--25 ı 1895 
T. a., I. taurus?, Chevreux in: Mem. Soe. zool. France, v.8 p. 425. 


Distinguished from I. spinieornis by not having calceoli (so far as 
appears) on the antennae of O0. Antenna 1, 1° joint or 1° and 24 joints, 
especially in C, usually with a little tooth; accessory flagellum 7-jointed. 
Finger of gnathopod 1 strongly curved (at least at the tip), carrying at 
the expanded base spines of variable size. Colour grey green, sprinkled 
with many red spots (Della Valle). L. 10—12 mm. 


Gulf of Naples, Adriatie, North-Atlantie flat. 47° N., long. 8° W., depth 2620 m). 


32. Gen. Anonyx Kröyer 


1838 Anonysx (part.), Kröyer in: Danske Selsk. Afh., v.7 p- 242 „1871 A., A. Boeck 
in: Forh. Selsk. Kar „ 1870 p. 107 | 1888 A., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.607 | 1891 A., G. O. Sars, Crust. Norway, v.1 p.87 | 1893 A. (part.), A. Della 
Valle in: F. Fl. Neapal: v.20 p.810 | 1894 A., T. Stebbing in: Bijdr. Dierk., 0.17 p.7. 


Side-plate 1 expanded below. Pleon segment. 3, postero-lateral angles 
upturned. Antenna 1, accessory flagellum well developed. Antennae 1 and 
2 inc with large calceoli. Epistome not projeeting. Upper lip produced 
in front to a compressed linguiform lobe. Mandible powerful, with one or 
two teeth at angle of cutting edge, molar prominent, conically produced 
and eiliated, palp set far forward. Maxilla 1, inner plate with 2 setae, 
outer broad, obliquely truncate, carrying 11 spimes, apex of palp having 
5—10 spine-teeth. Maxilla 2, inner plate much smaller than outer. Maxillipeds, 
outer plates broadly oval, not (or not always?) reaching end of. 24 joint 
of palp, which is "robust. Gnathopod 1 short and stout, distinetly sub- 
chelate, palm nearly transverse, finger short and without prominent secondary 


54 Anonyx 


tooth. Gmathopod 2, 6!" joint oval, its apex slightly produced beneath the 
minute finger. Peraeopods rather long, 24 joint large in peraeopods 3—5. 
Branchial vesicles transversely folded on both sides. Uropod 3 projecting 
beyond the preceding pair, rami lanceolate, with spinules and setae on the 
margins. Telson deeply cleft, with a pair of apical spinules. 


5 species. 
Synopsis of species: 


j Eyes greatly dilated below — 2. 
\ Eyes not greatly dilated below — 3. 


j Gnathopod 1, 6th joint not longer than 5th... . 1. A.nugax. .... p- 54 
Gnathopod 1, 6th joint longer than 5th .... 2. A.lagena..... p. 54 
pP h g 

Antenna 1, flagellum and accessory flagellum sub- : 

3 | 3 Eee SE en 9. A: aflinis .... p- 55 
| Antenna 1,_ flagellum and accessory flagellum ; 

unequal — 4. 
4 f Side-plate 1 scarcely widened below... .. . . . 4. A. lilljeborgii. . . p.55 
\ Side-plate 1 much widened below .. .... - 5. A. ampulloides . . p.55 


1. A. nugax (Phipps) .1774 Cancer n., Phipps, Voy. North Pole, p.192 t. 12 
f.2 | 1781 Gammarus n., J. C. Fabrieius, Spec. Ins., v.1 p. 516 | 1826 Talitrus n., 
J. C. Ross. in: W. E. Parry, J. third Voy., App. p.119 | 1829 Gammarus n., Atylus 


(part.)?, Latreille in: G. Cuvier, Rögne an., n.ed. v.4 p.120 | 1877 Anonyx n., Miers in: 


Ann. nat. Hist., ser.4 v.19 p.135 | 1891 & 95 A.n. (part.), G. O. Sars, Crust. Norway, 
v.1 p.88, 686 | 1893 A.n. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.834 | 1894 
A.n., T. Stebbing in: Bijdr. Dierk., ©.17 p.7 | 1845 & 46 A. ampulla (part.), Kreyer 
in: Naturh. Tidsskr., ser.2 v.1 p.578; v.2 p.43 | 1862 A. lagena (err., non Kröyer 
18381), Bate, Cat. Amphip, Brit. Mus., p. 77 t.12 £.7 | 1866 Lysianassa l., Goes in: 
Öfr. Ak. Förh., v.22 p.518. a 


Head, lateral angles little produced, slightly rounded. Side-plate 1 
widened below. Pleon segment 3, postero-lateral angles with upturned 
process acute, not long, segment 4 slightly carinate. Eyes flask-shaped, 
greatly widened below, very dark. Antenna 1, 1° joint not much longer 
than broad, flattened on inner side, sometimes also ridged on the outer side, 
flagellum in © of 23, in C of 34 joints, 1° not very elongate, accessory flagellum 
with 10 joints, 1 the longest. Antenna 2, ultimate joint of pedunele a little 
shorter than penultimate, flagellum in 9 reaching 40, iu S 60 joints. Gnathopod 1. 


6th joint equal in length to 5t", Gmathopod 2, 6% joint oval, rather more 


than half length of 5%. Uropod 2, inner ramus constrieted. Uropod 3, 
rami broad and flat, inner almost as long as outer, of which the 24 joint 
is small. Telson oblong, breadth two thirds of the length, very deeply 
cleft, 2 or 3 pairs of marginal spinules and a pair on the obtuse apices. 
Colour light rose-red on the back, nearly white on the sides (Kroyer), light 
claret-red (Sars). L. reaching 45 mm or more. 


Arctic Ocean, to lat. 83° 19 N. Depth 18—1184 m. 


2. A. lagena Kröyer 1838 Lysianassa l., A. I, (Reinhardt in MS.) + L. appen- 
diculosa, A. appendiculosus. Kröyer in: Danske Selsk. Afh., ©.7 p. 237, 244 t.1 f.1; 
p. 240, 244 t.1 f.2 | 1838 A.1.—+ A. appendiculosus, Kröyer in: Naturh. Tidsskr., v.2 
p- 256, 257|1840 Lysianassa I. + L. appendiculata, H. Milne Edwards, Hist. nat. Crust., 
v.3 p.21 ! 1855 Lyeianassa l., T. Bell in: Belcher, Last arct. Voy., v.2 p.406 | 1871 
Anony& l., A. Boeck in: Forh. Selsk. Christian., 1870 p. 108 | 1889 A. kükenthali, 
Vosseler in: Arch. Naturg., 0.551 p.154 t.8 f.1—17 | 1891 & 95 4A. nugax (parf.), 
A. lagena, G. O. Sars, Crust. Norway, v©.1 p.88 t.31; p. 686. 


ku EU ST nn 


d 4 IR NEE I ET 


= Anonyx 2 55 
In general elosely resembling A. nugax. Antenna 1 in ©, flagellum 
R 15-jointed, accessory flagellum 8-jointed. Antenna 2, flagellum in Q 23-jointed. 
Br. Gnathopod 1, 6 joint longer than 5%, Uropod 3, inner ramus longer than 
basal joint of outer. Colour whitish, with transverse yellowish band on each 
segment. L. © 18 mm. 
Arctic Ocean; North-Atlantie, North-Sea, Skagerrak and Kattegat (Scandinavia, 
North Britain). Depth 38—565 m. 


3. A. affinis Ohlin 1895 A.a. (non A. Della Valle 1893), Ohlin in: Acta Univ. 

Lund., ©.31 nr.6 p.24 t. f.15—18 | 1895 A. a., A. kükenthali var.?, Ohlin in: Zool. Anz., 
v.18 p. 486. 

©. Head, lateral angles a little produced, rounded. Pleon Besen 3, 
postero-lateral angles produced into short sharp process, segment 4 carinate. 
Eyes very large, oblong, dark. Antennae 1 and 2 short, subequal. Antenna 1, 
flagellum 6-, accessory flagellum 5- or 6-jointed. Antenna 2, ultimate joint of 
peduncle shorter than penultimate, flagellum 6- or 7-jointed. Palp of mandible 
= affıxed over molar. Gnathopod 1 as in A. lilljeborgii, but palm (in figure) more 
> oblique. Gnathopod 2, 5!" joint narrower than 3% and little longer, 6! joint 
3 distally truncate. Telson twice as long as broad, cleft nearly to the base. 
Uropod 3, inner ramus two thirds length of outer, with 3 long setae on 
inner margin. L. 13 mm. — JG unknown. 

Baffın Bay (Cape Dudley Digges). Depth 32—47 m. 


4. A. lilljeborgii Boeck 1871 A.1., A. Boeck in: Forh. Selsk. Christian., 1870 
p.109 | 1872 A. l., A..Boeck, Skand. Arkt. Amphip., v.1 p.154 t.4 f.3 | 1891 A. 1, 
G. O. Sars, Crust. Norway, v.1 p.90 t.32 f.1| 1894 A.L., T. Stebbing in: Bijdr. Dierk., 
v.17 p.8 | 1893 A. nugax (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 834. 

In general closely resembling A.lagena. Head, lateral angles a little 
more produced and narrowly rounded. Side-plate 1 of nearly uniform width. 
Pleon segment 3, postero-lateral angles not very acute. Eyes not greatly 
dilated below, brownish red. Antenna 1 in O, flagellum 14-, accessory flagellum 
6-jointed. Antenna 2 in O, flagellum 15-jointed. Gnathopod 1 not very robust. 
6th joint equal in length to 5%, rather tapering. Gnathopod 2 very slender, 
6!" joint narrower and more distinetly produced beneath the finger than in 
A. lagena. Peraeopods 1 and 2, an obtuse spine at end of 6% joint more con- 
spieuous than in the larger species. Uropod 3, rami narrower. Telson 
rather longer in proportion to breadth. L. Oo 11 mm. 

Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (West-Norway). Depth 
113—132 m. 


5. A. ampulloides Bate 1862 .A.a., Bate, Cat. Amphip. Brit. Mus., p.78 t.12 
f£.8 | 1888 A.a., T. Stebbing in: Rep. Voy. Challenger, ©.29 p.608 t.3 | 1891 A. a., 
G. 0. Sars, Crust. Norway, v.1 p.88 | 1893 A: nugax (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 834. e 
Head, lateral angles secarcely produced, rounded. Side-plate 1 considerablv 
widened below. Pleon segments 1—4 subcarinate, segment 3 with postero- 
lateral angles much upturned but little produced. Eyes large, reniform, 
nearly: meeting at top ofhead. Antenna 1, accessory flagellum with 7 or 8 joints, 
1° elongate. Antenna 2, ultimate joint of pedunele considerably shorter than 
penultimate. Gnathopod 1, 6!" joint narrower than 5t" and barely as long, 
scarcely narrowed distally. Gnathopod 2, 6! joint more than half length 
of 5%, narrow, palm slightly excavate, finger not extremely minute. Peraeo- 
pod 1, 6% joint having on hind margin a minute hooked spine close to 
hinge of finger. Uropod 2, inner ramus constrieted. Uropod 3, rami lanceolate, 


bi ie un 


RT, 


N bl Ze eh Ce, 


56 Anonyx, Socarnes 


subequal, outer with small 24 joint. Telson nearly twice as long as broad, 
cleft three quarters of length, rather dehiseent. L. about 13 mm. 


N orth-Paeifie (Japan). Depth 1419 m. 


33. Gen. Socarnes Boeck 


1838 Anonys (part.), Kröyer in: Danske Selsk. Afh., «.7 p.242 | 1847 Ephippiphora 
(Sp. un.: E. kroyeri) (non Duponchel 1834, Lepidoptera!), A. White in: P. zöol. Soe. 
London, ».15 p.124 | 1871 Socarnes (Sp. un.: 8. vahli), A. Boeck in: Forh. Selsk. 
Christian., 1870 p.99 | 1872 S., A. Boeck, Skand. Arkt. Amphip., «.1 p.128 ! 1890 S., 
G. 0. Sars, Crust. Norway, v.1 p.43 | 1893.8., J. Bonnier in: Bull. sei. France Belgique, 
v.24 p. 188. 


Body dorsally broad, laterally compressed. Side-plates rather large. 
Antenna 1, joints of flagellum not numerous; antenna 2 short in Q. Upper 
lip separated by rather deep incision from epistome and prominent beyond 
it. Mandibular processes of lower lip not very divergent. Mandible, cutting 
edge simple, molar very weak, palp attached behind it. Maxilla 1 normal. 
Maxilla 2 with inner plate obliquely truncate. Maxillipeds normal, inner 
plates obliquely truncate, outer rounded, 7% joint small normal. Gnathopod 1 
not subchelate. Gnathopod 2 elongate, subchelate. Peraeopods 3-—-5 successively 
longer. Branchial vesieles with accessory lobes on one side only. Uropod 3, 
rami of moderate size, outer 2-jointed. Telson deeply eleft. 


3 species accepted, 1 obscure. 


Synopsis of accepted species: 


Pleon segment 3 with central triangular pro- 


1 jeetion of postero-lateral margins . . . . 1. S, bidentieulatus.. . . p.56 
Pleon segment 3 without triangular pro- 
jection — 2. 
Antenna 1, accessory flagellum with more than 
| FIRE a en a een 2: van... 2.05% p. 57 
2 | Antenna 1, accessory flagellum with not more 
TE a. VE ee 3. S. erythrophthalmus . p.57 


1. S. bidenticulatus (Bate) 1835 Gammarus nugax (err., non Cancer n. Phipps 
1774!), J.C. Ross in: John Ross, App. sec. Voy., nat. Hist. p.87 | 1862 Lysianassa n., Bate, 
Cat. Amphip. Brit. Mus., p.65 t. 10 f.3 | 1858 L. bidenticulata, Bate in: Ann. nat. Hist., 
ser.8 v.1 p.362 | 1877 Anonyx bidenticulatus, Miers in: Ann. nat. Hist., ser.4 ».19 
p.136 | 1885 & 86 Socarnes b., G. O. Sars in: Norske Nordhavs-Exp., v.6 Crust. I 
p-139, 276 t.12 £.1; Crust. II p.38 | 1894 S$.b., T. Stebbing in: Bijdr. Dierk., v.17 p.3| 
1893 Tchnopus b., A. Della Valle in: F. Fl. Neapel, v.20 p. 804 | 1866 Lysianassa vahli 
(part.), Goes in: Öfv. Ak. Förh., v.22 p.518 | 1871 Socarnes v. (part.), A. Boeck in: 
Forh. Selsk. Christian., 1870 p.100 | 1882 S. ovalis, Hoek in: Niederl. Arch. Zool., 
suppl. I nr.7 p.42 t.3 f. 29—29r. 


Body deep and tumid. Head with lateral angles acute. Side-plates 
deep. Pleon segment 3 with postero-lateral margins showing 2 triangular 
projections, of which the upper is larger, the lower small and sometimes 
evanescent. Eyes narrow, reniform or sublinear, darkbrown. Antenna’ 1, 
peduncle short and thick, 1° joint large, 24 and 34 very short, flagellum of 
about 18 joints, the 1° not very large, accessory flagellum 9-jointed, more 
than half as long as primary. Antenna 2 in O more slender and scarcely 
longer than antenna 1, flagellum 17-jointed. Gnathopod 1, 6% joint tapering, 


Socarnes 57 


about as long as the 5th, 7tlı small. Gmathopod 2, 6% joint shorter than 
5th, not forming a chela but produced to angular corner beneath the finger. 
Peraeopods 3—5, 24 joint broadly 'expanded, almost eircular. Uropod 3 
scarcely reaching beyond uropod 2, rami shortly lanceolate. Telson triangular, 
cleft to the middle. L. attaining 36 mm. 


Aretie Ocean. 


2. S. vahlii (Kröyer) 1838 Lysianassa v., Anony& v., (Reinhardt in MS.) Kröyer 
in: Danske Selsk. Afh., v.7 p.233, 244 | 1871 Socarnes vahli (part.), A. Boeck in: Forh. 
Selsk. Christian., 1870 p.100 | 1890 8. v., G. O. Sars, Crust. Norway, v.1 p.44 t.16 f.2 | 
1894 S. vahlii, T. Stebbing in: Bijdr. Dierk., ».17 p.3 | 1888 Ephippiphora v., 8. (part.), 
T.Stebbing in: Rep. Voy. Challenger, v.29 p. 177, 1698 | 1893 Ichnopus nugax (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 804. 


Back broadly rounded. Head, lateral angles narrowly rounded. Side- 
plates rather deep. Pleon segment 3 broadly rounded at the postero-lateral 
corners. Eyes reniform, black. Antenna 1, 24 joint of peduncle not extremely 
short, flagellum with 12 joints, the 1°t rather small, accessory flagellum 7-jointed, 
half length of primary. Antenna 2 in 9 scarcely longer than antenna 1, in 9 
longer than the body. Gmathopod 1, 6!" joint narrower than 5tt and not 
longer, tapering, 7% small. Gnathopod 2 elongate, 6% joint half length of 
5th, roundly expanded below the finger. Uropod 3, inner ramus considerahly 
shorter than outer. Telson eleft beyond the middle, subequal in length to 
pedunele of uropod 3, the lobes narrowly rounded apically, a spinule at 
each apex. Colour whitish, with broad transverse bands of beautiful erimson 
spots. L. 14 mm. 


Arctie Ocean and North-Atlantie (West-Norway, chiefiy to the north). 


3. S. erythrophthalmus D. Roberts. 1892 S. e, D. Robertson in: P. nat. 
Hist. Soe. Glasgow, n. ser. v.3 p.200 | 1893 S. e., J. Bonnier in: Bull. sei. France 
Belgique, v.24 p.183 t. 6. 


Head with lateral angles rather sharply advanced, the margin above 
slightly serrate. Pleon segment 3 with postero-lateral angles rounded. 
Eyes oval, red, fading in spirit. Antenna 1, peduncle robust, flagellum of 
8—13 joints, 1° scarcely larger than 24; 24, 34 and 4! in J with calceoli; 
accessory flagellum with 4 slender joints. Antenna 2, a little longer than 
antenna 1, ultimate joint of peduncle shorter than penultimate, flagellum 
6—10-jointed. Gmathopod 1 as in S. vahlii. Gnathopod 2, 6tk joint: half 
length of 5t", rather squared below the 7!" joint. "Uropod 3 as in S. vahlii. 
Telson rather longer than peduncle of_uropod 3, cleft to the centre, with a 
spinule at each narrow apex. Colour pellueid with slight greenish tint. "The 
eggs few and large, when ripe golden yellow. L. 3—4 mm. 


Firth of Clyde, surface to 26 m; Pas de Calais (Cape Gris-Nez, depth 50 m). 


'8.kroyeri (A. White) 1847 Ephippiphora k., A. White in: P. zool. Soc. London, 
v.15 p.124 | 1884 E. kröyeri, Miers in: Rep. Voy. Alert, p.312 | 1888 E. kroyeri, 
Socarnes (part.), T. Stebbing in: Rep. Voy. Challenger, v. 29 p. 555, 1698 | 1862 
Lysianassa k., L. kröyeri, Bate, Cat. Amphip. Brit. Mus., p.65 t. 10 f.4 | 1872 Socarnes? 
kröyeri, A. Boeck, Skand. Arkt. Amphip., v.1 p. 128. 


L. 25 mm. 


Indian Ocean and South-Paeific (Tasmania, Dundas Straits, Prince of Wales 
Channel, Port Denison). 


58 Hippomedon 


34. Gen. Hippomedon Boeck 


1871 Hippomedon (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.102|1872 H., 
A.Boeck, Skand. Arkt. Amphip., v.1 p.135 | 1890 H., G.O. Sars, Crust. Norway, v.1 
p.55 | 1893 H., J. Bonnier in: Bull. sci. France Belgique, v.24 p.174 | 1893 H., A. Della 
Valle in: F. Fl. Neapel, v.20 p.807 | 1894 H., T. Stebbing in: Bijdr. Dierk., v.17 p.4 | 
1888 Platamon (Sp. un.: P.longimanus), T.Stebbing in: Rep. Voy. Challenger, 0.29 p.642. 


Side-plates rather narrow. Pleon segment 3, postero-lateral angles 
sharply upturned. Eyes imperfectly developed. Antenna 1, flagellum not 
large, 1° joint very large, accessory flagellum small. Antenna 2 much longer 
than antenna 1, flagellum many-jointed; flagellum of antennae 1 and 2 with 
calceoli in.J. Epistome not projeeting. Mandible short and strong, molar 
prominent, powerful, palp elongate, affixed in front of molar. Maxilla 1, 
inner plate short, with 2 setae, outer with the usual spines, palp expanded 
distally, earrying numerous spine-teeth. Maxilla 2, plates rather short and 
broad, the inner fringed on inner margin. Maxillipeds, outer plates fringed 
with spine-teeth on straight inner margin, generally reaching much beyond 
24 joint of the robust palp. Gmnathopod 1 slender, 5 joint long, 6!" oblong 
ovate, with ill-defined palm, finger slender. Gnathopod 2 subchelate. Peraeo- 
pods slender, except 24 joint of pairs 3—5. Branchial vesicles of peraeo- 
pods 3 and 4 somewhat complex, a small one on peraeopod 5. Uropod 3, 
rami long, subequal, with marginal spinules, generally without conspicuous 
setae, the outer 2-jointed. Telson oblong, eleft deep, dehiscent, with 1 pair 
of apieal spinules. 


6 species. 
Synopsis of species: 
j Eyes with one eonspieuous lens apiece.. . - . . 1. H.holböli ... ... p.58 
- | Eyes without lenses — 2. 


| Pleon segment 3, lateral processes defined by a 
2 Kobalt 2. H. denticulatus . . p.59 


3 j Gnathopod 1, palm confluent with hind margin — 4. 

\ Gnatliopod 1, palm not eonfluent . . ..... 6. H. geelongi. . . . p.60 
Pleon. segment 3, lateral processes acutely pro- 

A | IONDaB Re, re ee a 3. H. propingvus . . p.59 
| Pleon segment 3, lateral processes rather short 

and blunt — 5. 
f Cleft of telson scarcely dehiscent ... ... .. 4. H. robustus. . . . p.59 
| 


5 | Cleft of telson strongly dehiscent .. .»..... 5. H.longimanus . . p.60 


1. H. holbölli (Kroyer) 1846 Anonyx h., Kroyer in: Naturh. Tidsskr., ser. 2 
v.2 p.8,38 | 1846 A. h., Kroyer in: Voy. Nord, Crust. t.15 f.1a—s | 1866 Lysianassa h., 
Goös in: Öfv. Ak. Förh., v.22 p.520 | 1885 Hippomedon h. var., G. O. Sars in: Norske 
Nordhavs-Exp., v.6 Crust. I p.142 t.12 f£.2 | 1887, H. h., H. J. Hansen in: Vid. Meddel., 
ser. 4 ©.9 p.63 t.2 f.1—1b | 1890 H. h., H. holbelli, G. O. Sars, Orust. Norway, v.1l 
p-58 t.21 f.2 | 1893 H. holbölli (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 808. 


Head, lateral angles not produced. Side-plate 1 scarcely widened below. 
Pleon segment 3, postero-lateral angles moderately upturned, acute, segment 4 
with conspicuous carina. Body above and partly on the side very finely 
reticulate with longitudinal striae, side-plates and sides of pleon finely granu- 
late. Eyes at lateral angles of head, with a conspicuous watchglass-shaped 
lens. Antenna 1, joints of pedunele not produced, flagellum 12-jointed, 
accessory flagellum 4-jointed. Antenna 2, ultimate joint of peduncle little longer 


sein en u m u ne Kia an 5 a er 


EEE IRIREN 


Hippomedon 59 


than penultimate. Peraeopods, 7tk joint elongate. Uropod 3, 24 joint of 
outer ramus rather long. Telson not twice as long as broad, eleft extending 
®/, of the length, dehiscent. L. 11—16 mm. 


Arcetie Ocean. 


2. H. denticulatus (Bate) 1857 Anonyx d., Bate in: Ann. nat. Hist., ser. 2 
v.19 p.139 | 1861 A. d., Bate & Westwood, Brit. sess. Crust., v.1 p.101 f. | 1887 Hippo- 
medon d., H. J. Hansen in: Vid. Meddel., ser.4 v.9 p.65 t.2 f.2—2b | 1890 H.d., 
G. ©. Sars, Crust. Norway, v.1 p.56 t.20 | 1893 H.d. (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p.808 t.29 f£.33—42 | 1871 H. holbolli (err., non Anony« holbölli Kroyer 
1846!), A. Boeck in: Forh. Selsk. Christian., 1870 p. 102 | 1872 H. h., H. holbölli, 
A. Boeck, Skand. Arkt. Amphip., v.1 p. 136 u: 8; 66 87. 


Head, lateral angles slight produced, acute. Side-plate 1 widened 


'below, covering the mouth-organs. Pleon segment 3, postero-lateral angles 


strongly upturned, unique in having a notch separating the acute process 
from the hind margin, segment 4 without carina.. Body smooth, slightly 
punctate. Eyes linear, slightly widened below, without lenses, light red, 
transversely striped with opaque white. Antenna 1, joints 1 and 2 bluntly 
produced, flagellum in © 11-jointed, in d much longer, accessory flagellum 
3-jointed. Antenna 2in O more than twice aslong as antenna 1, in C as long as the 
body, ultimate joint of peduncle nearly twice penultimate. Gnathopod l, 6int 
half as long as 5%, palm finely denticulate. Peraeopods, 7'h joint scarcely 
more than half as long as 6. Uropod 3, 24 joint of outer ramus very 
small. Telson nearly twice as long as broad, cleft extending beyond the 
middle, distally dehiscent, with one pair of marginal spinules. Body whitish, 
pellueid, with some transverse orange bands. L. Q 14, 9 11 mm. 

North-Atlantie, North-Sea, Skagerrak and Kattegat (Bohuslän, Denmark, Great 
Britain, France); Mediterranean. 


3. H. propingvus 0. Sars 1859 Anonyx holbölli (err.. non Kreyer 1846!), 
R. M. Bruzelius in: Svenska Ak. Handl., n.ser. v.3 nr. 1 p.43 | 1890 Hippomedon pro- 
pingvus, &. O. Sars, Crust. Norway, v.1 p.57 t.21 f.1 | 1893 H. propinquus, A. Della 
Valle in: F. Fl. Neapel, v.20 p.810 | 1894 H. squamosus, T. Stebbing in: Bijdr. Dierk., 
v.17 p.4 t.1. 

Head, lateral angles narrowly rounded. Side-plate 1 scarcely widened 
below. Pleon segment 3, postero-lateral angles strongly upturned, acute 
process without defining notch, segment 4 slightly produced dorsally. 
Integument very finely and irregularly reticulated. Eyes as in H. denti- 
culatus. Antenna 1, joints 1 and 2 little produced, 1° joint of flagellum very 
elongate, accessory flagellum slender, 3-jointed. Antenna 2, ultimate joint of 
peduncle little longer than penultimate. Gnathopod 1 more slender than 
in H. denticulatus. Peraeopods 1 and 2, 7" joint nearly as long as 6#", with 
cap over the apex. Uropod 3, 24 joint of outer ramus rather large. Telson 
more than twice as long as broad, cleft extending much beyond the middle, 
distally dehiscent, with 2 or 3 pairs of marginal spinules. Colour whitish, 
pellueid, tinged with erimson at either end. L. © 10 mm. 


North-Atlantic and Arctie Ocean (Trondhjemsfjord, Nordland and Fumark to 


_Vadsö). Depth 37-188 m. 


4. H. robustus O. Sars 1895 H.r.,, G.O. Sars, Crust. Norway, v.1. p. 679 
t. DI £.1. 
Head, lateral angles acute, scarcely produced. Side-plate 1 a little 
expanded below, 4!" much broader than the preceding pairs. Pleon segment 3, 
postero-lateral angles unusually short and broad, 4" segment with dorsal 


60 Hippomedon, Glycerina 


depression shallow. Integument finely and irregularly retieulated. Eyes 
narrow oblong, widened a little below, without trace of visual elements, 
light red, transversely striped with öpaque white. Antenna 1, joints 1 and 2 
slightly produced, flagellum in © with 11 joints, 1° of moderate length, accessory 
flagellum 4-jointed. Antenna 2, ultimate joint of peduncle little longer than 
penultimate; flagellum in © 32-jointed. Telson about twice.as long as broad, 
eleft extending about °/, of length, dehiscent only distally, carrying 2 or 3 
pairs of marginal spinules. Body whitish, pellueid, without coloured patches, 
but side-plates and 24 joint in peraeopods 3—5 mottled with dark greenish 
spots. L. © 10 mm. 
Trondhjemsfjord. Depth 94 m. 


5. H. longimanus (Stebb.) 1888 Platamon 1., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p. 643 t.13 | 1898 Hippomedon denticeulatus (part.). A. Della Valle in: 
F. Fl. Neapel, ©.20 p.808. 

Head, lateral angles moderately acute. Side-plate 1 a little. widened 
below, 4!" considerably. Pleon segment 3, postero-lateral angles  acutely 
upturned, the process neither very long nor very sharp, segment 4 with 
‚slight carina ending acutely. Eyes not observed. Antenna 1, 1° joint carinate, 
produced over the 24, flagellum in oO with 7 joints, 1° very long, accessory 
flagellum small, 3-jointed. Antenna 2, ultimate joint of peduncle scarcely longer 
than penultimate, flagellum 35-jointed. Maxilla 1 with 19 teeth on very 
broad apex of palp. Maxillipeds, outer plates not reaching greatly beyond 
2% joint of palp. Gnathopod 1, 6t% joint fusiform, palm denticulate, and 
finger with cap over the apex, as in H. dentieulatus, H. propingvus, and 
probably other species. Gnathopod 2, 6*"joint distally widened, with excavate 
palm, finger comparatively large. Peraeopods 1 and 2, 7{k joint as long as 6", 
with cap over apex. Uropod 3, 24 joint of outer ramus not very large. 
Telson not twice as long as broad, cleft extending *,, of the length, dehiscent 
throughout, with 3 or 4 pairs of marginal spinules. L. about 17 mm. 

North-Atlantie (Cape Finisterre). Depth 2057 m 


6. H. geelongi Stebb. 1888 H.g., T. Stebbing in: Rep. Voy. Challenger, v.29 
p-635 t.11 | ?1895 Cheirimedon cerenatipalmatus (err., non T. Stebbing 1888!), A. Della 
Valle in: F. Fl. Neapel, v.20 p. 837. 

Head, lateral angles acute. Pleon segment 3, postero-lateral angles 
acutely upturned, the process not very large. No eyes perceived. Antenna 1, 
1° joint very obtusely produced, not carinate, accessory flagellum 5-jointed. 
Antenna 2, ultimate Joint of pedunele not longer than penultimate, flagellum 
30-jointed. Maxilla 1, inner plate with 7 very unequal setae, outer with 
11 spines, palp with 12 spine-teeth. Gnathopod 1, 6tk joint as long as 5, 
slightly widened distally, the moderately oblique palm overlapped by the 
finger. Peraeopods, finger long and slender. Uropod 3 with plumose setae 
as well as spinules on both rami, the outer rather the longer, with a short 
24 joint. Telson with 2 pairs of marginal spinules, cleft extending much 
beyond the middle, the apices a little dehiscent. L. 12 mm. 

The position of this speeies in the genus is rather doubtful. 

Port Phillip [Melbourne]. Depth 60 m. 


35. Gen. Glycerina Hasw. 


1880 Glycera (Sp. un.: @. ten (non Savigny 1822, Vermes!), Haswell in: 
P. Linn. Soe. N.S.Wales, r. 4 p- 256 | 1882 Glycerina (Sp. un. :@. tenwicornis), Haswell, 
Cat. Austral. Crust.. p. 933 | 1888 G., T. Stebbing in: Rep. Voy. Challenger, r.29 p.648. 


Glycerina, Scopelocheirus 61 


Antenna 1 slender, rather long. Mandible, molar prominent. Maxilla 1, 
outer plate with oblique apical margin, 7 or 8 spine-teeth on apex of palp. 
Gnathopod 1 imperfectly subchelate. Gmathopod 2 subchelate. Uropod 3, 
rami broadly lanceolate. Telson deeply cleft. 


The genus and its 2 species remain in much obscurity. 


2 species. 


Synopsis of species: 


Gnathopod 1, 6th joint much shorter than th . ....... 1. G. tenuicornis . p.61 
Gnathopod 1, 6th joint much longer than th ...... 2. G.affinis . . . p.6l 


1. G. tenuicornis (Hasw.) 1880 Glycera t., Haswell in: P. Linn. Soc, N. S.Wales, 
v.4 p.256 t.8 f.6 | 1882 Glycerina t., Haswell, Cat. Austral. Crust., p. 234 t.4 f. 3. 


. Head, lateral angles rather acutely - produced. . Pleon segment 3, 
postero-lateral angles subquadrate. Eyes long oval, nearly meeting above. 
Antenna 1, 1° joint stout, flagellum slender, longer than pedunele, accessory 
flagellum 9-jointed. Antenna 2 rather longer than antenna 1, flagellum 
3 times as long as peduncle. Gnathopod 1 long, filiform, 6t" joint about 
”/, length of 5%, irregularly ovoid, narrowed distally, with eurved setae on 


hind margin. Gnathopod 2 long, slender, stouter than gnathopod 1, 6% joint 


nearly twice as long as 5 [?], subquadrate, nearly. as broad as long, palm 
concave, defined by acutely produced angle. Peraeopod 3 much shorter than 
the rest, 24 joint eircular with deeply serrate hind margin. Peraeopods 4 and 5, 
2° joint oval, not deeply serrate. Apices of telson acute. L. 8 mm. 


Coral Sea (Howiek Group), Port Jackson [East-Australia]. 


N 2. G. affinis Chilton 1885 @. «., Chilton in: P. Linn. Soe. N.S. Wales, v.9 p. 1036 
t.47 f.1a,b. 

In general shape closely resembling G. tenuicornis. Gmathopod 1, 
6" joint longer than 5**, tapering, without palm. Gnathopod 2 very long 
and 'slender, 6t% joint shorter than 5%, of uniform width, nearly 3 times as 
long as broad, palm rather oblique. 

Port Jackson [East-Australia]. 


36. Gen. Scopelocheirus Bate 


1851 Callisoma (non L. Agassiz 1846, Coleoptera!) (part.), A. Costa, Fauna Reg. 
Napoli, fasc. Marz. 1851 p.1 | 1888 C., T. Stebbing in: Rep. Voy. Challenger, v.29 p.247 
1890 C., G.O.Sars, Crust. Norway, v.l p.52 | 1893 C©., A. Della Valle in: F. Fl. Neapel, 
v.20..p.838 | 1856 Scopelocheirus (nom. nud.), Bate in: Rep. Brit. Ass., Meet. 25 p.58 | 
1857 S. (Sp. un.: $. crenatus), Bate in: Ann. nat. Hist., ser.2 «.19 p. 138. 


Side-plates large. Antenna 1 much shorter than äntenna 2, 1° jomt 
tumid, 15 joint of flagellum in 9 very large, accessory flagellum rather small. 
Antenna 2, basal joint swollen, flagellum long and slender, especially in 9; 


‚antennae 1 and 2 in C with calceoli. Epistome projeceting, rounded, defined by 


a sinus from upper lip. Hind lobes of lower lip very divergent. Mandible, 
molar prominent, tapering, palp affıxed above it, large, setose. Maxilla 1, 
inner plate with several plumose setae along inner margin, outer plate with the 
usual spines, palp large with bifurcate apical spines. Maxilla 2, both plates short, 
broad, densely setose, setae ofinner plate fringing its inner margin. Maxillipeds, 
outer plates not reaching end of 24 joint of palp, fringed with spine-teeth, 
4" joint of palp long and slender. Gnathopods 1 and 2 subequal in length. 


62 Seopelocheirus 


Gnathopod 1, 6% joint long, narrow, with double row of delicate setae at 
apex, finger rudimentary in dense brush of setae. Gmnathopod 2 minutely 
chelate. Peraeopods 3—5, 24 joint expanded; 4tk joint of 3% pair expanded; 
5th pair longest. Uropod 3 prolonged, rami subequal, with spinules and 
setae. Telson long, narrow, deeply cleft, with a pair of apical spinules. 


2 species. 
Synopsis of species: 


Gnathopod 1, 6th joint much longer than öth ...... 1. 8. hopei ° . . . p.62 
Gnathopod 1, 6th joint not longer than öth .. ..... 2. 8. crenatus . . p.62 


1. S. hopei (A. Costa) 1851 Callisoma h., A. Costa, Fauna Reg. Napoli, fasc. 

- Marz. 1851 p.5 t.8u f.1| 1851 C. h., (A. Costa in:) F, W. Hope, Cat. Crost. Ital., p. 44 

f.2 | 1893 C. h. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.839 t.6 f.11; t.26 

f.1—15; t.48 f.19 | 1853 ©. barthelemyi, A. Costa, Deser. 3 Crost. dal Hope, p.7 | 1859 

Anonyx kröyeri, R. M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 nr.1 p.45 42 f.7.| 

1890 Callisoma k., G. O. Sars, Crust, Norway, ©.1 p.54 t.19 £. 28 | 1874 C. branickii, 
Wrzesniowski in: Ann. nat. Hist., ser.4 v.14 p.15. | 


Head, lateral angles little produced. Side-plate 1 widened below, not 
completely covering ‘mouth-organs, expansion of 4! not quadrate. Pleon 
segment 3, postero-lateral angles almost quadrate, hind margin smooth, 4b 
with dorsal depression moderately deep, followed by rounded carina. Eyes 
broad oval, dark brownish (Sars), scarlet (Della Valle). Antenna 1 ino, 
flagellum with 7 or 8 joints, 1° not very large, accessory flagellum with 3 or 
4 joints. Mandible, 24 joint of palp broad. Gnathopod 1, 6 joint considerably 
longer than 5%, margins parallel. Gnathopod 2, 5tk joint much widened 
distally. Peraeopods 3—5, 4 joint considerably dilated in the 34, but much 
less so in the other two. Uropod 3, inner ramus a little shorter than outer, 
but scarcely narrower. Telson about twice as long as broad, cleft almost 
to the base. Colour yellowish, without distinet pigmentary spots. L. © 
5:5 (Sars), 7 (Bruzelius) mm. 

Mediterranean; North-Atlantie, North-Sea, Skagerrak, Kattegat and Baltie (Great 
Britain, Norway, Sweden). Depth 58-78 m. 


2. S. crenatus Bate 1856 $. breviatus (nom. nud.), Bate in: Rep. Brit. Ass., 
Meet.25 p.58 | 1857 S. crenatus, Bate in: Ann. nat. Hist., ser.2 0.19 p.138 | 1861 
Callisoma crenata, Bate & Westwood, Brit. sess. Crust., «.1 p. 120 f. | 1890 ©. e., @. ©. 
Sars, Crust. Norway, v.1 p.53 t.19 f.1 | 1890 T’ryphosa serra, Meinert in: Udb. Hauchs, 
v.3 p.156 t.1 f.80-—88 | 1893 Callisoma hopei (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p. 839. 


Head, lateral angles slightly projecting. Side-plate 1 widened below, 
completely covering mouth-organs, expansion of 4" quadrate. Pleon segment 3 
almost quadrate, hind margin crenulate, 4 with deep dorsal depression in 
front of rounded carina. Eyes broad oval, reddish brown, orange-coated. 
Antenna 1, flagellum ‘with 10—12 joints, 1° very large only in Q, accessory 
flagellum 3-jointed. Antenna 2 in Q, flagellum 24-jointed. Gmnathopod 1, 
6h joint subequal to 5t", slender, slightly narrowed at the middle. Gnatho- 
pod 2, 6! joint much shorter than the slender 5t". Peraeopod 3, 24 joint 
greatly dilated. Peraeopods 3 and 4, 4tk joint dilated. Uropod 3, inner ramus 
as long as outer. Telson nearly 3 times as long as broad, deeply cleft, 
with a pair of dorsal spinules.. Colour yellowish, with numerous orange 
spots. L. 0 95 mm. 

North-Atlantie, North-Sea and Skagerrak (Great Britain, South- and West- 
Norway); Kattegat. 


| 
; 


Alicella, Uristes 63 


37. Gen. Alicella Chevreux 
1899 Alicella (Sp. un.: A. gigantea), Chevreux in: Bull, Soe. zool. France, 2.2Pp.154. 


Head short, hollowed in front. Side-plates not so deep as their respective 
segments. Eyes large, imperfectly developed. Antennae 1 and 2 slender. 
Antenna 1 with accessory flagellum well developed. Lobes of lower lip 
apically narrowed. Mandible with broad dentate cutting edge,. accessory 
plate on left mandible .denticulate, molar consisting of a narrow, spinulose, 
backward-pointing lamina, palp short, 34 joint dilated, strongly setose. 
Maxilla 1, inner plate obliquely truncate, fringed with 16 plumose setae, 
outer plate with 9 spines, 24 joint of palp long, with 23 apical spines. 
Maxilla 2, inner plate a little shorter than outer, each carrying long 
plumose setae. Maxillipeds, inner plates obliquely truncate at apex, outer 
plates broad, nearly reaching end of palp’s 24 joint, ultimate joint of palp 
dactyliform. Gmathopod 1 short, simple. Gmathopod 2 long, slender, feebly 
subchelate. Uropod 3, rami long, equal, lanceolate. Telson elongate, some- 
what tapering, cleft nearly to the base. 


1 species. 


1. A. gigantea Chevreux 1899 A. g., Chevreux in: Bull. Soc. zool. France, 
v.24 p.154 f. 1—6. 


Pleon segments 3—6 dorsally grooved and slightly bicarinate. Head in front 
forming a kind of vault, at bottom of which the antennae 1 and 2 are inserted. 
Side-plate 5 less deep than side-plate 4, much broader than deep. Pleon 
segment 3, postero-lateral corners quadrate. Eyes opaque white or orange, 
irregularly reniform, without trace of ecelli. Antenna 1, 24 joint not half 
as long as 1°t, 34 very short, flagellum 35-jointed, accessory flagellum 9-jointed. 
Antenna 2 a little the longer, ultimate joint of pedunele much longer than 
penultimate, flagellum 60-jointed. Epistome little prominent, upper lip with 
unsymmetrical apex, feebly bilobed. Gnathopod 1, 6% joint tapering, rather 
shorter than 5t%, finger more than one third as long as 6%. Gmnathopod 2 
more than twice as long as gnathopod 1, 6tR joint very slender, nearly as 
long as 5%, its front and hind margins parallel, finger feeble and short. 
Peraeopods 1 and 2 not longer than gnathopod 1, joints 2—4 rather robust, 
the following slender, very short. Peraeopods 3—5, 24 joint somewhat 
expanded, the rest slender. Peraeopods 4 and 5 equal, longer than peraeopod 3, 
finger very short. Pleopods 1—3, rami very long, many-jointed. Uropods 1 and 2, 
outer branch nearly smooth, rather shorter and narrower than the spinulose 
inner branch. Uropod 3, rami fringed with long plumose setae. Telson 
with numerous little groups of spinules along back of each lobe, apex of. 
each emarginate, carrying 2 spines. Colour white tinted with greenish 
yellow. L. reaching 140 mm. I 


North-Atlantie (lat. 31° N., long. 28° W.). Depth 5285 m. 


38. Gen. Uristes Dana 


1849 Uristes, J. D. Dana in: Amer. J. Sei., ser.2 v,8 p. 136 | 1852 U. (Sp. un.: 
U. gigas), J. D. Dana in: P. Amer.Ac., v.2 p.209 | 1862 U., Bate, Cat. Amphip. Brit. 
Mus,, 'p.89 | 1888 U., T. Stebbing in: Rep. Voy. Challenger, v.29 p.263 | 1893 T., 
A. Della Valle in: F. Fl. Neapel, v.20 p.836 | 1899 TU., T. Stebbing in: Ann. nat. Hist., 
ser.7 v.4 p.211 | 1891 Pseudotryphosa, G. O. Sars, Crust. Norway, v.1 p.83 | 1893 
Tryphosella (part.), J. Bonnier in: Bull. sei. France Belgique, v.24 p. 170. 


64 Uristes 


Body stout. Pleon strongly developed. Side-plates 1—4 in position not 
oceupying a greater length than side-plates 5—7 in position. Antenna 1 and 2 
calceoliferous, the flagella many-jointed. Antenna 1, flagellum stout, accessory 
flagellum slender. Antenna 2 not much longer than antenna 1. Epistome 
little or not at all projeceting. Mandible, molar well developed, palp affıxed 
nearly over it, the 34 joint elongate. Maxilla 1, inner plate with 2 plumose 
setae, outer with very oblique apex, spine-teeth on apex of palp very small. 
Maxillipeds, outer plates broad, not quite reaching apex of 24 joint of palp, 
palp rather robust, 4% joint unguiform. Gmathopod 1 imperfectly subchelate. 
Gnathopod 2 subchelate. Peraeopods 3—5, 24 joint much expanded. Uropod 3 
extending much beyond uropod 2, both rami carrying setae on inner margin, 
inner ramus longer than 1° joint of outer. ' Telson large, twice as long as 
broad, deeply cleft. 


2 species. 
Synopsis of species: 


Side-plate 9 am0olh 72:0, Zar ee a 1. U.gigas... . . p.64 
Side-plate 5 with oentral boss » , ..... 2. u 22: 2. U. umbonatus . p. 64 


1. U. gigas Dana 1849 U., J. D. Dana in: Amer. J. Sei., ser.2 0.8 p.136 | 1852 
U. yigas, J.D. Dana in: P. Amer. Ac., v.2 p.209|1853&55 U. g., J. D. Dana in: U. 'S. expl. 
Exp., ve. 1311 p.917; 1.62 f.3a—g | 1899 D.g., T. Stebbing in: Amn. nat. Hist.,'ser. 7 
0.4 p.211 | 1888 U. g. + Tryphosa antennipotens, T. Stebbing in: Rep. Voy. Challenger, 
0.29 p.266; p.617 t.6 | 1891 Pseudotryphosa a., G. O. Sars, Crust. Norway, v.1 
p-83 | 1893 Anonyx a. + 4. ?gigas, A. Della Valle in: F. Fl. Neapel, v. 20 p. 827, 836 
1893 Tryphosella a., J. Bonnier in: Bull. sei. France Belgique, v.24 p. 171. 


Head, lateral angles acute. Side-plate 1 narrowed below, concealing 
the mouth-organs, 2—4 successively deeper, overlapping. Pleon segment 4 
dorsally depressed, then carinate, with upturned apex; postero-lateral angles 
of segment 3 produced, very broadly rounded. Eyes reniform, seemingly 
large, indistinet in spirit. Antenna 1, 1° joint long, flagellum with 52 joints, 
1°! not very long, accessory flagellum slight, 4-jointed, shorter than 1° ofprimary. 
Antenna 2, ultimate and penultimate joints of peduncle subequal, flagellum 
53-jointed, rather louger and thinner than in antenna 1, in both with ealceoli 
in 9. Epistome a little prominent. , Lower lip, mandibular processes not 
specially divergent. Maxilla 1 with setae on outer margin below palp, and 
also (according to Dana) at base of its 1° joint. Gnathopod 1, 6% joint a 
little longer than 5tb and nearly as broad, slightly narrowed distally, palm 
ill-defined, 7" joint less than half length of 6". Gnathopod 2, 6" joint more 
than half as long as 5!ı, palm transverse. Peraeopods 3—5, 24 joint much 
expanded, hind margin serrulate. Peraeopod 5 rather shorter than peraeopod 4. 
Uropod 3, rami long, broadly lanceolate, subequal, carrying spines and plumose 
setae. Telson long, narrowing a little distally, eleft *, of length, with 5 lateral 
and 2 apical spines to each lobe. L. 18 mm. 


Antaretie Ocean; Southern Indian Ocean (Heard Island, depth 274 m). 


2. U. umbonatus (O. Sars) 1882 Ichnopus u., G. O. Sars in: Forh. Selsk. 
Christian., nr. 18 p.79 t.3 f.2 | 1891 & 95 Pseudotryphosa iwmbonata, G. O. Sars, Orust. 
Norway, v.1 p.88 t.29 f.2; p. 686 | 1893 Anonyx umbonatus, A. Della Valle in:F, Fl. 
Neapel, v.20 p.825 | 1899 Uristes u., T. Stebbing in: Ann. nat. Hist., ser.7 v.£ p.211. 


Head, lateral angles acute. Side-plate 1 narrowed_ below, 5tk broader 
than deep, with central outstanding boss or umbo. Pleon segment 3 nearly 


De EL. 


6 ae 5 1) Dr ee a or a a he I = a a ae a en N Zn 


en m a oT a m 0 2 Tal Sl) LA ZU Dale 2 Brian ud SA I a T 


Uristes, Centromedon i 65 


quadrate, 4 without any dorsal projeetion. Eyes narrow, sigmoid, light red, 
evanescent in spirit. Antenna 1, 1° joint rather elongate, flagellum stout, of 
25 joints, 1°t largest, not very large, accessory flagellum almost filiform, of 
6 small joints. Antenna 2 rather longer than antenna 1, ultimate joint of 
pedunele longer than penultimate, flagellum not very stout, 23-jointed. Epistome 
not projecting. Gnathopod 1, 6% joint much longer than 5", oblong, palm very 
oblique, ill-defined, 7% joint about half as long as 6". Gnathopod 2, 6! joint 
rather broader than 5t%, and more than half as long. Telson tapering much, 
carrying 2 pairs of dorsal spinules. Colour whitish. L. 11 mm. 

Aretie Ocean, North-Atlantic and North-Sea (West-Norway), Skagerrak. Depth 
55—790 m. 


39. Gen. Centromedon O. Sars 


1891 Centromedon (Sp. typ.: ©. pumilus), &. O. Sars, Crust. Norway, v.1 p.99 | 
1893 C., J. Bonnier in: Bull. sei. France Belgique, v.24 p. 173. 


Head, lateral angles acutely produced. Side-plates deep. Pleon segment 3, 
postero-lateral angles acutely upturned. Eyes imperfeet or wanting. Antenna 1 
and 2 in © stout, subequal. Epistome not projecting. Mandible, molar 
conical, palp rather large, affiıxed over molar. Maxilla 1, inner plate’ with 
2 setae, outer with usual,spines, apex oblique, palp with few spines on apex. 
Maxilla 2, inner plate a little shorter than outer. Maxillipeds, outer plates 
not reaching end of 24 joint of palp, which has the 4" joint small. Gnatho- 
pod 1 stout, imperfectly subchelate. Gnathopod 2 subchelate. Peraeopods 3—5, 


‚24 joint large; 5th peraeopod much shorter than 4. Uropod 3 rather small, 


rami without marginal setae. Telson oblong, deeply cleft, with 2 pairs of 
apical spinules. 
4 species. 


Synopsis of species: 


Peraeopod 5, 2d joint with lower hind corner acute 1. C. calcaratus . p.65 
1 Peraeopod 5, 2d joint with lower hind comer 
rounded — 2. 
0 | Head, lateral angles slightly upturned. . ... . - 2. C. productus. . p.66 
| Head, lateral angles straight pointed — 3. 
f Pleon segment 4 with rounded earina. ... ... . 38. C. pumilus. . . p.66 
\ Pleon segment 4 with pointed carina . »..--.. 4. C.typhlops . . p.66 


1. C. calcaratus (O. Sars) 1879 Anonyx e., Hippomedon?, G. O. Sars in: 
Arch. Naturv. Kristian., ©. 4 p. 440 | 1885 A.c., G. O. Sars in: Norske Nordhavs-Exp., 
v.6 Crust. I p. 142 t.12 £.3 | 1893 A. c., A. Della Valle in: F. Fl. Neapel, v.20 p. 829 | 
1891 A. c., Centromedon?, G. O. Sars, Crust. Norway, v.1 p.100, 


Head, lateral angles produced to a straight spine-like point. Side- 
plate 1 not narrowed below. Pleon segment 3, postero-lateral angles acutely 
upturned to a greater extent than in any other species of the genus, 4% without 
carina. Eyes wanting, unless represented by a diffuse whitish-yellow pigment. 
Antenna 1, peduncle rather stout, flagellum with 9 joints, 1° not very long, 
accessory flagellum 3-jointed. Antenna 2 about as long as antenna 1, ultimate 
Joint of pedunele much shorter than penultimate, flagellum 9-jointed. Gnatho- 
pod 1, 6% joint longer than 5%, rather narrow, tapering, palm undefined. Gnatho- 
pod 2, 6tk joint comparatively broad, palm not produced. Peraeopods 1 and 2, 
7 joint almost straight. Peraeopods 3 and 4, 24 joint oval. Peraeopod 5, 24 joint 
rather quadrate, the lower hind corner outdrawn to a spine-like point. Uropod 3 

Das Tierreich. 21. Lief.: T.R. R. Stebbing, Amphipoda I. 5 


66 Centromedon, Cheirimedon 


nearly as in ©. pumilus, but 24 joint of outer ramus less elongate. Telson 
very deeply cleft, much tapering. Colour whitish. L. 8 mm. 


Arctic Ocean (between Iceland and Jan Mayen, North West of Bear Island). 
Depth 1240—2260 m. 


2. C. productus (Go&s) 1866 Lysianassa producta, Go&s in: Öfv. Ak. Förh., 
v.22 p.519 1.37 f.4.| 1891 Centromedon affinis, G. O. Sars, Crust. Norway, v.1 p.101 | 
1893 C. a., Anonyx a., A. Della Valle in: F. Fl. Neapel, v.20 p.831, 920. 


Nearly allied to C. pumilus, but differs by its much larger size, by the 
lateral corners of the cephalon being not straight but slightly upturned at 
the tip, and by having the postero-lateral angles of pleon segment 3 considerably 
narrower and more produced (Sars). L. 8 mm (Goös). 

Aretie Ocean and North-Atlantie (Spitzbergen, Norway). 


3. C. pumilus (Lillj.) 1865 Anony« p., W. Lilljeborg in: N. Acta Soc. Upsal., 
ser.8 v.6 nr.1 p.26 t.4 f.35—41 | 1893 A.p., A. Della Valle in: F. Fl. Neapel, v.20 
p. 831 | 1891 Centromedon p., G. O. Sars, Crust. Norway, v.1 p.100 t.34 £.2. 


Head, lateral angles drawn out into a straight spine-like point. Side- 
plate 1 narrowed below. Pleon segment 4 with small rounded carina. Eyes 
wanting. Antenna 1, pedunele not very stout, flagellum with 8 joints, 1° not 
elongate, accessory Hagellum 3-jointed. Antenna, 2 scarcely longer than 
antenna 1, ultimate joint of pedunele a little shorter than penultimate, flagellum 
9-jointed. Gmathopod 1, 6% joint as long as 5tt, tapering distally, palm 
oblique, ill-defined, 7*ı half length of 6%. Gmathopod 2, 6tk joint oblong oval, 
more than half length of 5%, palm transverse. Peraeopods 1 and 2, 6! joint 
slender, 7! long. Uropod 3, inner ramus longer than basal joint of outer, 
which has the 29 joint nearly as long as the basal. Telson with 1 or 2 pairs 
of dorsal spinules. Colour whitish, tinged with red at ends of segments 
and joints. L. © 5 mm. 

Arctic Ocean, North-Atlantie (North-America, Norway), Skagerrak (Bohuslän). 
Depth 94—188 m. 


; 4. C,typhlops (O.Sars) 1879 Anony« t., G.O.Sars in: Arch. Naturv. Kristian., 
v.4 p.486 | 1885 A.t., G.O. Sars in: Norske Nordhavs-Exp., v.6 Crust.I p. 145 t.12 
f.4a—k | 1891 A. t., Centromedon?, G.O.Sars, Orust. Norway, v.1 p.100 | ?1889 A. caecus, 
Vosseler in: Arch. Nabiig, v.551 p.155 t.8 f.8—14 | 1893 A. nugax (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p. 834. 

Head, lateral angles pr oduced, somewhat acutely. Side-plate 1 narrowed 
below. Pleon segment 3, postero-lateral angles shortly but acutely upturned, 
4th with an acutely ending carina. Eyes wanting. Antenna 1, pedunele 
short and thick, flagellum of 11 joints, 1° large, accessory flagellum slender, 
4-jointed. Antenna 2 rather longer than antenna 1, ultimate and penultimate 
joints of peduncle subequal, flagellum 18-jointed. Gnathopod 1, rather stout, 
6'h joint a little longer than 5", with oblique but distinet palm. Peraeo- 
pods 3—5, 24 joint oval. Uropod 3 as in C. calcaratus (p. 65), telson with 
cleft not quite so deep. Colour whitish, tinged with red. L. 15 mm. 


Arctie Ocean (between Jan Mayen and Finmark). Depth 3200 m. 


40. Gen. Cheirimedon Stebb. 


1888 Cheirimedon (Sp. un.: (©. crenatipalmatus), T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.638 | 1890 C., G. O. Sars, Crust. Norway, v.1 p.34 | 1893 C., J. Bonnier 
in: Bull. sei. France Belgique, v.24 p.174 | 1893 C., A. Della Valle in: F. Fl. Neapel, 
v.20 p. 837. 


Cheirimedon, Tryphosella 67 


Head, lateral corners angularly projecting. Body compressed; side-plates 
deep, 4" deeply not broadly excavate. Pleon segment 4 with high compressed 
projection. Antenna 1, 24 and 34 joints short, 1°t of flageilum long. Epistome 
slightly projecting, defined by short ineision from upper lip. Mandible with 
denticulate molar, palp elongate, attached above the molar, its 1% joint 
short. Maxilla 1, inner plate with 2 plumose setae, outer with 11 spines, 
palp with many apical spine-teeth. Maxilla 2, plates fringed at the apices. 
Maxillipeds, plates of moderate size, 24 joint of palp not longer than 1%, 
Gmathopod 1 subchelate, 5!" joint very short, triangular, 6!" large, expanding 
gradually to the transverse palm, 7% joint as long as breadth of palm. 
Gnathopod 2 subchelate. Peraeopods 1 and 2, 4!" joint rather long. Peraeo- 
. pods 3—5, 24 joint longer than broad. Branchial vesicles simple. Uropod 3, 
pedunele not very long, outer ramus 2-jointed, much longer than the inner. 
Telson narrowing distally, deeply cleft. 


2 species. 
Synopsis of species: 


Pleon segment 3, postero-lateral angles uneinate . . 1. C. crenatipalmatus. . p. 67 
Pleon segment 3, postero-lateral angles quadrate. . 2. C.latimanus. .. . . p- 67 


1. C. erenatipalmatus Stebb. 1888 ©. c., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.638 t.12 | 1893 C. c., A. Della Valle in: F. Fl. Neapel, v.20 p. 837. 


F Head, lateral lobes sharply produced. Pleon segment 3, postero-lateral 
| angles acutely and strongly upturned. Antenna 1, flagellum with 12 joints, of 
R which 1° very long, longer than 3-jointed accessory flagellum; antenna 2, ulti- 
h mate and penultimate joints of pedunele subequal, flagellum 7-jointed. Maxillal, 
palp with 9 teeth on right, 12 on left maxilla. Gmathopod 1, palm margin 
erenulate. Gnathopod 2, 34 joint shorter than 5t", which is rather robust, 
6!h scarcely half length of 5", palm not at all produced, finger shutting 
closely upon it. Telson nearly once and a half as long as broad. L. © 7’5 mm. 


Cumberland Bay [Kerguelen Island]. Depth 230 m. 


y 2. C. latimanus (0. Sars) 1882 Normania latimana, G. ©, Sars in: Forh. 
Selsk. Christian., nr. 18 p.83 t.3 £.6,6a | 1890 Cheirimedon latimanus, G. O. Sars, 
Crust. Norway, v.1 p.35 t.13 f.2 | 1893 ©. L., A. Della Valle in: F. Fl. Neapel, v.20 
p. 838 t. 60 f.50. 


Head, with lateral lobes produced almost acutely. Pleon segment 3, 
postero-lateral angles quadrate. Eyes narrow oval. Antenna 1, flagellum with 
7 joints, of which the 1° moderately long, about half as long as. the slender 
3-jointed accessory flagellum; antenna 2, ultimate joint of peduncle much shorter 
than penultimate, flagellum 6-jointed. Gnathopod 1, 6 joint with palm 
margin not erenulate. Gnathopod 2, 6% joint fully half length of 5t". Telson 
almost twice as long as broad. L. © 6 mm. 


North-Sea (Bukken [West-Norway)). 


Ed im mal un 1 00 Su 2 5 Lei ni ua Linn nei u 


41. Gen. Tryphosella Bonnier 


1890 Orchomenella? (part.), &. ©. Sars, Crust. Norway, v.1 p.66 | 1893 Tryphosella 
(part.), J. Bonnier in: Bull. sei. France Belgique, v.24 p. 170. 


Antenna 2 in o little longer than antenna 1. Mandible with denticulate 
molar, which is prominent, pointing backward, palp with 1° joint short, 


dr 


68 Tryphosella, Tryphosa 


attached just over molar. Maxilla 1, inner plate 

with 2 setae, outer with 11 spines on sliehtly. 

decurrent apex. Maxilla 2, outer plate rather longer 

\ than inner. Maxillipeds, inner plates normal, outer 
fully reaching end of 24 joint of palp, fringed on 

inner margin with stout spine-teeth, 24 joint of palp 

not longer than 1%. Gnathopod 1 setose, subchelate, 

34 joint not longer than 4, 6tk much longer than 

5th, oblong, palm transverse. Gnathopod 2 (Fig. 11) 

minutely chelate, 6!" joint less than half as long as 

HZ 5th, Peraeopods 3—5, 24 joint large. Peraeopod 4 


6% joint longer than peraeopod 5. Uropod 3, inner ramus 
Fig. 11. T. barbatipes. as long as basal joint of outer. Telson cleft beyond 
Gnathopod 2. the. centre. 
1 species, 


1. T. barbatipes (Stebb.) 1888 Tryphosa b., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.621 t.7 | 1890 T. b., Orchomenella?, G. O. Sars, Crust. Norway, v.1 
p-66 | 1893 Anonyx b., A. Della Valle in: F. Fl. Neapel, v.20 p.814 | 1893 Tryphosella b., 
J. Bonnier in: Bull. sei. France Belgique, v.24 p.171, 195. 

Head, lateral corners much produced, acute. Side-plate 1 narrowed 
below, 5!" as broad as deep. Pleon segment 3, postero-lateral angles slightly 
rounded. Antenna lin oO, flagellum with 8 joints, 1° large and equal to 4-jointed 
accessory flagellum. Antenna 2 in © , ultimate and penultimate joints of peduncle 
subequal, flagellum about 7-jointed. Peraeopods, 4 joint only little widened. 
Telson oblong oval, cleft for °/, of its length. L. © 9 mm. 

Southern Indian Ocean (Kerguelen Island). Depth 228 m. 


42. Gen. Tryphosa Boeck 


?1849 Stenia, J. D. Dana in: Amer. J. Sci., ser.2 v.8 p.136 | 1871 Tryphosa 
(part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.117 | 1876 T. (part.), A. Boeck, 
Skand. Arkt. Amphip., v.2 p.180 | 1891 & 95 7, G. O. Sars, Crust. Norway, v.1 p. 75; 
p- 683, 684 | 1893 Tryphosella (part.), Typhosa (laps.), J. Bonnier in: Bull. sei. France 
Belgique, v.24 p. 170. 

Side-plate 1 usually narrowed below. Accessory flagellum of antenna 1 
well developed. Antenna 2 in scarcely half the length of the body. Epistome 
usually projecting in front of upper lip, rounded. Mandible, molar denticulate, 
prominent, palp attached just over it, with 1° joint short, 24 elongate. 
Maxilla 1, inner plate short with 2 setae, outer obliquely truncate with 
crowded spines. Maxilla 2, outer plate a little longer than inner. Maxillipeds 
normal, outer plates reaching beyond 24 joint of palp, the margin crenulate. 
Gnathopod 1 slender, subchelate, 6!" joint scarcely as long as Ö5th, both 
narrow. Gmnathopod 2 subchelate, 6!" joint rather stout, more than half as 
long as 5th, Peraeopods 3—5, 24 joint large, rest of limb sender. Uropod 3, 
inner ramus at least as long as basal joint of outer. Telson oblong oval, 
deeply cleft. 


9 species. 


Synopsis of species: 
Eyes wanting — 2. 
Eyes present — 5. 
0 Pleon segment 4 not dorsally elevated — 3. 
Pleon segment 4 dorsally elevated — 4. 


EEE N U We DD ON 


el ld en 1 HÖR Anl a a a 


Tryphosa 69 


Pleon segment 3, postero-lateral corners not acute 

3 EORDDIO Serien ee er 1. T.insignis.. . . p.69 
Pleon segment 3, postero-lateral corners acutely 

a er ea a ee 2. T. kergueleni . p.69 

ä Aelson Taperiee DIR. 0. en 3. T. trigonica . . p.70 
Toon: TRDORIUE TanelE 5 0 a: ee een 4. T. pusilla . . . p.70 

5 Pleon segment ee 5. nar8l:: „72.070 
Pleon segment 4 carinate — 6. 

6 Head with lateral angles acute . . .. :..... 6. T. angulata . . p.70 
Head with lateral angles rounded — 7. 

7 Gnathopod 2, 6th joint broader than 5thı . .... 7. T. compıessa . p.7l 
Guathopod 2, 6th joint not braader than 5th — 8, 

8 Pleon segment 4 with rounded cearina. . ..... 8. T.nanoides . . p.7l 
Pleon segment 4, carina angularly produced at apex 9. T. heringii . . . p.71 


1. T.insignis Bonnier 1896 T.i., J. Bonnier in: Ann. Univ. Lyon, v.26 p.619 
t. 36 £.1. 


Head, lateral corners produced to a right-angled lobe with straight 
sides. Side-plate 1 scarcely narrowed at rounded distal end, 4% large, much 
produced backward. Pleon segment 3, postero-lateral eorners produced backward 
in narrowly rounded lobe, segment 4 not dorsally elevated. Eyes wanting. 
Antenna 1 in young JS, flagellum of 7 joints, 15! as long as the peduncle’s short 24 
and 34 joints combined, the other 6 joints small, without calceoli, accessory 
flagellum 3-jointed. Antenna 2 scarcely longer than antenna 1, flagellum with 
7 small joints. Epistome not projecting in front of upper lip. Gnathopod 1 slender, 
5th and 6th joints equal, palm small, defined by 2 spinules, finger bifid. Gnatho- 
pod 2 scarcely longer, 5!" joint considerably longer than 6", Peraeopod 3, 
24 joint nearly as broad as long, smaller than the side-plate. Peraeopod 4, 24 joint 
oblong oval, rest of limb more elongate than in peraeopods 3 and 5. Peraeo- 
pod 5, 24 joint very large, rest of limb small. Uropod 3, 2-jointed outer ramus 
with 1 seta on outer margin, inner ramus quite unarmed. Telson deeply 
cleft, with 2 pairs of marginal and 1 of apical spines. L. 6 mm. 


Bay of Biscay. Depth 950 m. 


2. T. kergueleni (Miers) 1875 Lysianassa k., Miers in: Ann. nat. Hist., ser. 4 
e.16 p.74 | 1879 Anonyx k., Miers in: Phil. Tr.. v.168 p.207 t.11 f.4 | 1888 Hippo- 
medon k., T. Stebbing in: Rep. Voy. Challenger, v.29 p.623 t.8 | 1893 H. holbölli (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 808. 


Head, lateral angles acutely produced. Side-plate 1 not narrowed 
below. Pleon segment 3, postero-lateral angles upturned, the process long, 
narrow, acute, segment 4 not apically elevated. Eyes doubtful. Antenna 1, 
1° joint broad and long, flagellum with 14 joints, 1° not very long, accessory 
flagellum 5-jointed. Antenna 2, ultimate joint of pedunele a little shorter than 
penultimate, flagellum 16-jointed. Maxilla 1, with 12 spine-teeth on apex 
of palp. Maxillipeds, with spine-teeth on inner margin of outer plates. Gnatho- 
pod.1, 6% joint very little shorter than 5%, rather narrow, of uniform width, palm 
oblique. Gnathopod 2, 6 joint long ovate. Uropod 3, inner ramus longer 
than basal joint of outer. Telson nearly twice as long as broad, cleft extending 
more than three fourths of length, not dehiscent, with 3 pairs of marginal 
spinules and a pair in the emarginate apices. L. 10-mm. 


Southern Indian Ocean (Kerguelen Island). Depth 37 m. 


70 Tryphosa 


3. T. trigoniea (Stebb.) 1888 Hippomedon trigonicus, T. Stebbing in: Rep. 
Voy. Challenger, 0.29 p.630 t.9 | 1893 Anonya miersi?, A. Della Valle in: F. Fl. Neapel, 
v.20 p.814, 952. 


Head, lateral angles moderately acute. Pleon segment 3, postero-lateral 
angles upturned, the process short, only subacute, segment 4 with raised 
angular apex. Antenna 1, 1° joint long and narrow, flagellum with 11 joints, 
1° not very long, accessory flagellum 3-jointed. Antenna 2, ultimate and 
antepenultimate joints of peduncle equal, shorter than penultimate, flagellum 
9-jointed. Epistome a little prominent, rounded. Maxillipeds and gnathopod 1 
as in T. kergueleni (p. 69). Gnathopod 2, 6! joint rather stouter. Uropod 3, 
inner branch not longer than basal joint of outer. Telson not greatly longer 
than broad, the cleft not dehiscent, */, of the length, with 3 pairs of marginal 
spinules and a pair on the truncate apices. L. 6 mm. 


Southern Indian Ocean (Kerguelen Island). 


4. T. pusilla (O. Sars) 1879 Anony«x (T.) pusillus, &. OÖ. Sarsin: Arch. Naturv. 
Kristian,, v.4 p.439 | 1885 T'. pusilla, G.O,Sars in: Norske Nordhavs-Exp., v.6 Crust. I 
p.151 1.18 £.2, 2a. 


Head, lateral angles prominent, obtuse. Pleon segment 3, postero-lateral 
angles acute, scarcely produced, segment 4 hunched above. Eyes wanting. 
Antenna 1, flagellum with 11 joints, 1° rather large, accessory flagellum very 
slender, 3-jointed. Antenna 2 about equal to antenna 1, ultimate joint of 
peduncle very short, flagellum 12-jointed. Epistome not deseribed. Gnatho- 
pod 1, 6" joint subequal to 5t%, slender, palm rather oblique. Telson tapering 
much. Colour whitish. L. 5'5 mm. 


Arctie Ocean (between Jan Mayen and Iceland). Depth 1890 m. 


5. T. sarsi (Bonnier) 1891 T. nana (err., non Anonya& nanus Kroyer 1846!), 
G. O. Sars, Crust. Norway, v.1 p.76 t.27 f.1 | 1893 Tryphosella sarsi, J. Bonnier in: 
Bull. sci: France Belgique, v.24 p.171 | 1895 Tryphosa s., G. O. Sars, Crust. Norway, 
v.1 p. 684. 


Head, lateral angles little projeeting, rounded. Pleon segment 3, postero- 
lateral angles quadrate, segment 4 without dorsal projeetion. Eyes oblong 
oval, light red. Antenna 1, fagellum with 9 joints, 1° rather sbort, accessory 
flagellum slender, of 5 joints, 1% short. Antenna 2 in © little longer than 
antenna 1, flagellum 9-jointed; antenna 2 in J twice as long as antenna 1. 
Epistome obtusely angular in front. Gnathopod 1, 6th joint about as long 
as 5th, palm nearly transverse. Gnathopod 2, 6th joint oval, scarcely narrower 
than 5%, Uropod 3, inner ramus equal to basal joint of outer. Telson 
with 2 pairs of marginal spinules. Body whitish, pellueid, with a few reddish 
spots. L. 9 4 mm. 


North-Atlantie (Norway). Depth 11—38 m. 


6. T. angulata O.Sars 1891 T.a., G. O. Sars, Crust. Norway, v.1 p.78 t.28 
f£.1 | 1893 Tryphosella a., J. Bonnier in: Bull. sei. France Belgique, v.24 p.171 | 1893 
Anonyx& angulatus, A. Della Valle in: F. Fl. Neapel, v.20 p. 825. 


Head, lateral angles drawn out into a little tooth. Pleon segment 3, 
postero-lateral angles quadrate, segment 4 with high carina, the apex vertically 
two-angled. Eyes very large, narrow oblong, light red. Antenna 1, peduncle 
narrower than usual, flagellum setose, of 14 joints, 1% not long; accessory 
flagellum of 5 joints, none long. Antenna 2 in © a little longer than antenna 1, 
flagellum 15-jointed. Epistome prominent, evenly rounded. Gmathopod 1, 


Tryphosa 71 


6'h joint scarcely as long as 5t%, palm oblique, finger with secondary tooth 
conspicuous. Gnathopod 2, 6!" joint as broad as 5th, Uropod 3, inner ramus 
equal to basal joint of outer. Telson with 3 or 4 pairs of marginal spinules. 
Colour pale reddish. L. © 7 mm. 


Aretie Ocean (Nordland, Finmark), Trondhjemsfjord. Depth 188—282 m. 


7. T. compressa O. Sars 1891 & 1895 T.c., G. O.Sars, Crust. Norway, v.1 
p- 76; p.685 t. IV f.2 | 1893 Tryphosella e., J. Bonnier in: Bull. sei. France Belgique, 
v.24 p.171. 


Head, lateral angles much projecting, narrowly rounded. Pleon segment 3, 
postero-lateral angles less than a right angle, tbe point not sharpened, 
segment 4 as in T. angulata. Eyes long, narrow, slightly sigmoid, light red. 
Antenna 1, 1° joint of pedunele rather long, flagellum 12-jointed, accessory 
flagellum with 6 joints, 1° short. Antenna 2 in O subequal to antenna 1, flagellum 
14-jointed. Epistome large, evenly rounded. Gmnathopod 1, 6" joint shorter 
than 5tt, oblong linear, the palm small, a little oblique, finger with secondary 
tootb conspieuous. Gnathopod 2, 6% joint large, hirsute, broader than 5th, 
distally widened, palm transverse, defined by a projecting angle, finger rather 
strong and curved. ‚Uropod 3, inner ramus scarcely longer than basal joint 
of outer. Telson with 3 pairs of marginal spinules. L. Q 8 mm. 


Arctic Ocean (West of Spitzbergen, Nordland). 


8. T. nanoides (Lillj.) 1865 Anonyx n., W. Lilljeborg in: N. Acta Soe. Upsal., 
ser.8 v.6 nr.1 p.25 t.3 f.32—34 | 1898 A.n., A. Della Valle in: F. Fl. Neapel, v.20 
p. 852 | 1871 Tryphosa n., A. Boeck in: Forh. Selsk. Christian., 1870 p.118 | 1876 T.n., 
A. Boeck, Skand. Arkt. Amphip., v.2 p.186 | 1891 & 95 T.n., G. O. Sars, Crust. Norway, 
v.1p.79 t.28 f£.2; p.684 | 1893 Tryphosella n., J. Bonnier in: Bull. sei. France Belgique, 
v.24 p.171. 


Head, lateral angles little projeeting, rounded. Pleon segment 3, 
postero-lateral angles a little obtusely upturned, segment 4 with rounded 
carina overlapping segment 5. Eyes large, reniform, pale red. Antenna 1, 
peduncle massive, flagellum with 11 joints, 1° very large, accessory flagellum 
with 10 joints, 1°° comparatively large. Antenna 1 in © rather longer than 
antenna 2, flagellum 22-jointed. Epistome with narrow rounded lobe overhanging 
upper lip. Gnathopod 1, 6!" joint a little shorter than 5tt, palm transverse. 
Gnathopod 2, 6t% joint about half as long as 5tt, scarcely as broad. Uropod 3 
larger than usual, inner ramus subequal to basal joint of outer, both with 
small setae on inner margin. Telson very slightly tapering, with 3 or 4 pairs 
of marginal spinules.. Body whitish pellucid, with diffuse orange patches. 
L. 9 8 mm. 


Aretice Ocean; North-Atlantie, North-Sea, Skagerrak, Kattegat and Baltie 
(Norway, Sweden, Denmark, Scotland). Depth 94—188 m, 


9. T.horingii Boeck 1871 T.h., A. Boeck in: Forh. Selsk. Christian., 1870 
p.118 | 1876 T. höringiü, A. Boeck, Skand. Arkt. Amphip., v.2 p.182 | 1891 T. hörringii, 


. T. höringiüi, &. O. Sars, Crust. Norway, v.1 p.77 t.27 f£.2 | 1893 Tryphosella hörringii, 


J. Bonnier in: Bull. sci. France Belgique, ».24 p.171 | 1893 Anonyx nanus (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 820. 


Head, lateral angles projecting, rounded. Pleon segment 3, postero- 
lateral angles almost quadrate, segment 4 with high carina angularly produced at 
apex. Eyes large, oblong oval, widened below, light red. Antenna 1, peduncle 
stout, flagellum with 11 joints, 1° not very large, accessory flagellum with 6 joints, 


72 Tryphosa, Chironesimus, Eurythenes 


1st the longest. Epistome rather prominent, rounded. Gnathopod 1 slender, 
6th joint a little shorter than 5%, palm nearly transverse. Gmnathopod 2, 
6th joint searcely as broad as 5%. Uropod 3, inner ramus rather longer 
than basal joint of outer. Telson with 3 pairs of marginal spinules. Colour 
pale reddish. L. 9 7, C 6 mm. 


Arctic Ocean and North-Atlantie (North America, Scandinavia). Depth 94-282 m. 


43. Gen. Chironesimus 0. Sars 


1891 Chironesimus (Sp. un.: C. debruynii), G. O. Sars, Crust. Norway, v.1 p.108 | 
1894 C., T. Stebbing in: Bijdr. Dierk., v.17 p.13. 


Head, lateral lobes slightly produced, subacute. Side-plate 1 scarcely 
expanded below, 4 rather considerably. Pleon segment 3, postero-lateral 
angles acutely upturned. Epistome not projeeting, upper lip forming in front 
a rather large compressed linguiform lobe. Mandible, molar tapering to a 
blunt apex, palp rather large, set well forward. Maxilla 1, 2 setae on inner 
plate, 11 spines ‘on outer, 9 spine-teeth on palp. Maxilla 2, inner plate not 
very narrow, more than half as long as outer. Maxillipeds, broad outer 
plates set with minute teeth on inner and apieal margin, 4!" joint of palp 


not elongate. Gmathopod 1 subchelate, 6" joint shorter and much narrower 


than 5t", oblong, slightly narrowed towards the short almost transverse palm. 
Gnathopod 2, 24 joint rather shorter than 5tt, 6tk more than half as long 
as 5th, widening distally, front margin longer than hind one, palm concave, 
the curved finger not reaching its outer angle. Peraeopods comparatively 
slender. Peraeopods 3—5, 24 joint large, 4!" not very robust. Uropod 2, 
inner branch constricted. Uropod 3 reaching beyond uropod 2, rami longer 
than peduncle, subequal, lanceolate, outer with small second joint, both 
carrying spinules and setae. Telson nearly twice as long as broad, cleft 
more than °/, length, a spinule in each of the blunt rather divergent apices. 


l species. 


1. C.debruynii (Hoek) 1882 Anonyx d., Hoek in: Niederl. Arch. Zool., suppl.1 
nr.7 p.44 t.3 £.50—30x | 1893 A. d., A. Della Valle in: F. Fl. Neapel, v. 20 p. 830 | 
1891 & 95 Chironesimus d., G.O.Sars, Crust. Norway, v.1l p.109 t.37 £.2; p- 687 | 1894 
C. d., T: Stebbing in: Bijdr. Dierk., v.17 p.13. 


Eyes oblong oval, a little broader below, red. Antenna 1, 1° joint 
tumid, ridged on inner margin, 24 and 34 very short, flagellum in o with 11 joints, 
in S with 18 (or more), 1° largest, accessory flagellum with 6 joints, 1° large and 
somewhat expanded. Antenna 2, ultimate and penultimate joints of peduncle 
a a flagellum in Q with 15 joints, in G with 20 (or more). Gmatho- 
pod 1, the 6! joint is as long as the 5t" and papers too much to form a 
palm (Hoek, not Sars or Stebbing). Peraeopod 5, 24 joint broadly oval, 
about as long as rest of limb. Colour yellowish white, intestine dark brown, 
ovaries reddish. L. (JSjuv.?) 20 (Hoek), O0 14 (Sars) mm. 


Arctic Ocean; North-Atlantie and North-Sea (West-Norway). Depth 94—-240 m. 


44. Gen. Eurythenes S. I. Sm. 


1865 Eurytenes (Sp. un.: E. magellanicus) (non Arn. Foerster 1862, Hymenoptera!), 
W.Lilljeborg in: N. Acta Soc. Upsal., ser.8 ©.6 nr.1 p.11 | 1882 Eurythenes, (8.1. 
Smith in:) Seudder, Nomencl. zool., suppl. L. p.135 | 1884 E., S. I. Smith in: Amer. 
J. Sci., ser.3 v.28 p.54 | 1891 Euryporeia, G.O. Sars, Crust. Norway, v.1 p.85 | 1893 
E., A. Della Valle in: F. Fl. Neapel, v.20 p. 847. 


u u ne ul A U LU 9 2 


er ee 


Eurythenes, Tmetonyx 73 


Body massive. Head, lateral angles little produced. Side-plates not 
very deep, 1° very small, rounded, not covering the head or the protruding 
mouth-organs, 5? much broader than deep. Antenna 1, pedunele not very 
stout, flagellum with many short joints, accessory flagellum well developed. 
Antenna 2 in © much longer than antenna 1, ultimate joint of pedunele longer 
than penultimate, flagellum many-jointed. Epistome not defined by an 
ineision from upper lip, projeeting broadiy rounded in front of mouth- 
organs. Lower lip with front lobes apically emarginate. Mandible broad, 
molar large and prominent, palp not very long, affixed a little in front of 
molar. Maxilla 1, inner plate carrying many setae, outer with the usual 
11 spines on oblique apex, palp very narrow, apical spines few. Maxilla 2, 
inner plate much shorter than outer, both with many setae along inner 
margin. Maxillipeds normal, the large outer plates not reaching beyond 
24 joint of the large setose palp, their inner margin furnished with small 
nodular teeth. Gnathopod 1 strong, subchelate, 6!" joint rather longer than 
5th, almost oblong, a little tapering, palm small, slightly excavate. Gmnatho- 
pod 2 very slender, subchelate, 6t" joint much more than half length of 
bih, nearly linear, not produced to form a chela with the minute finger. 
Peraeopods 3—5 rather short and stout, 24 joint moderately large, 4% some- 
what expanded and produced. Uropod 3 projecting beyond uropods 1 and 2, 
rami foliaceous, setose, inner ramus as long as basal joint of outer. Telson 
long, free from spinules, sharply tapering, celeft deep, not dehiscent. 

1 species. 

1. E. gryllus (Leht.) 1822 Gammarus g., (H. Lichtenstein in:) Mandt, Observ. 
Groenl., p. 34 | 1866 Lysianassa g., Goes in: Öfv. Ak. Förh., v.22 p.517 t.36 f.1 | 1884 


Burythenes 9.; S.L Smith in: Amer. J. Sei., ser.3 0.28 p.54 | 1891 Euryporeia g., 
G. O. Sars, Crust. Norway, v.1 p.86 t.30 | 1893 E. g., A. Della Valle in: F. Fl. Neapel, 


'v.20 p.848 t.60 f.58 | 1848 ZLysianassa magellanica, H. Milne Edwards in: Ann. Sei. 


nat., ser.3 v.9 p.398 | 1865 Eurytenes magellanicus, W.Lilljeborg in: N. Acta Soc. 
Upsal., ser.3 v.6 nr. 1 p.11 t.1—3 f£. 1—22. 

Back broadly rounded (Sars), last segment of peraeon and 1° —5tk of pleon 
with a low longitudinal ridge (Lilljeborg), segments 4—7 of peraeon and 1—4 of 
pleon carinate. Pleon segment 3, postero-lateral angles rounded, segments 3 
and 4 with dorsal depression. Eyes very large, irregularly flask-shaped, light 
orange. Antenna 1, 1° joint not very long, flagellum with 30 joints, 1° large, 
accessory flagellum with 10 joints,‘1°t* the largest. Antenna 2 twice as long as 
antenna 1, flagellum slender, setose, 50-jointed. Gmathopod 2 twice as long 
as gnathopod 1. Telson nearly reaching apex of uropod 3. Colour rosy 
with yellowish tinge, margin of legs vermilion. L. reaching 90 mm. 

D Arctie Ocean and North-Atlantie (Finmark, North East of America, Bay of 
Biscay, Azores), tropical Atlantie (lat. 4° S., long. 18° W.). South-Atlantie (Cape Horn). 
From Procellaria glaecialis L., from stomachs of sharks, and fished up from great depths. 


45. Gen. Tmetonyx Stebb.*) 
1891 Hoplony& (non Jam. Thomson 1858, Coleoptera!), G. O. Sars, Crust. Norway, 
v.1 p.91 | 1894 H., T. Stebbing in: Bijdr. Dierk., v.17 p.9. 
Epistome more or less projeeting and rounded in front. Antennae 1 and 2 


in S with small ealceoli. Mandible, molar large, obliquely truncate, palp affıxed 
over it, 24 and 34 joints subequal. Maxilla 1, 2 setae on inner plate. 


*) Nom. nov.; tuntöc, shaped by cutting, övuf, nail. — The name Hoplonys 
is preoceupied (1858, James Thomson in: Arch. ent., v.2 p. 98). 


74 Tmetonyx 


11 PR on the broad obliquely truncate outer, several spine-teeth on palp. 
Maxilla 2, plates rather longer than in Anonyx (p. 53). Maxillipeds, outer plates 
large, oblong oval, reaching end of 24 joint of palp, which is not specially 
robust. Gnathopod 1 slender, 3% joint generally longer than 4h, 6th oblong, 
palm very oblique, rather indistinetly defined, 7% rather long, minutely 
denticulate, having a secondary tooth on inner margin and a cap over the 
apex. Gmnathopod 2, 6% joint usually not at all produced beneath the 
minute finger. Peraeopods 1, rather elongate, 24 joint large. Branchial 
vesicles usually simple. Ur opod 3 projecting beyond uropod 2, rami minutely 
dentieulate. Telson oblong, deeply cleft. 


8 species. 


Synopsis of species: 


1 Pleon segment 3 little or not at. all produced — 2, 
Pleon segment 3 acutely produced or upturned — 5. 

9 Head, lateral corners rounded — 3. 

Head, lateral corners not rounded — 4. 

3 M Antenna 1, 1st joint of flagellum not very large 1. T.eicada . . .. . p.74 
Antenna 1, 1st joint of flagellum very large . . 2. T.miersi.... . p- 75 
Head, lateral corners acute, much praiiend; eyes 

bright U Ne RR BR TEE EN BIN BUS. SE, p- 75 
Head, Gnkerad corners quadrate; eyes light red, 
ER IT N EN EEE Se 4. T.albidus ....p.7 

5 Side-plate 1 expanded below . .. 2... 5. T. cicadoides . . . p.75 

“ 1 Side-plate 1 not expanded below — 6. 

Java DIIGRE BE a en BI simmilin 4.5458 p. 76 

6 Dyon Wan. a ee Er er 7. T. leucophthalmus p.76 
Ey wenn ae Tara 8. T. caeculus . . . . P.76 


1. T. cicada (O0. Fabr.) 1780 Oniscus c., O. Fabricius, Fauna Groenl., p.258 | 
1888 Anonyx e., T. Stebbing in: Rep. Voy. Challenger, v.29 p.47, 617 | 1893 A.c. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p.833 | 1891 Hoplonyx c., G.O. Sars, Crust. 
Norway, v.1 p. 92 t.32 £.2| 1894 H. c., T. Stebbing in: Bijdr. Dierk., v.17 p.9 | 1845 
Anonyx& gulosus, Kroyer in: Naturh. Tidsskr,, ser.2 v.1 p.611 | 1846 3; ‚9., Kroyer in: 
Voy. Nord, Crust. t.14 f.2a—t | 1866 Lysianassa gulosa, Goös in: Öfv. Ak. Förh., 
v.22 p.520 | 1851 Anonyx norvegicus, W. Liljeborg in: Öfv. Ak. Förh., v.8 p.22 | 1861 
A. bruzelü, A. Boeck in: Forh. Skand. Naturf., Mede 8 p. 643. 


Head, lateral angles very slightly projecting, slightly rounded. Side- 
plate 4 expanded in a narrow obtuse lobe. Pleon segment 3, postero- 
lateral angles almost quadrate, with very short produced point. Eyes angled, 
narrow linear above, lower arm oval, bright red. Antenna 1in oO, flagellum with 
16 joints, 1° not very large, accessory flagellum 7-jointed. Antenna 2 in O, 
flagellum 28-jointed. Gnathopod 1, 5" and 6t% joints equal in length, palm 
arcuate, finely serrate, not defined by any trace of angle. Gnathopod 2, 
6th joint half as long as 5tk, Uropod 2 with neither ramus constrieted. 
Uropod 3, inner ramus scarcely longer than basal joint of outer. Telson 
not quite twice as long as broad, cleft nearly to base, with 2 pairs of 
dorsal spinules and an apical pair. Colour creamy with tinge of rose and 
on the back bright apple red; eggs in pouch dark violet. L. Q 18—24 mm. 


Arctie Ocean; North-Atlantie, North-Sea and Skagerrak (South- and West- 
Norway, Bohuslän, North Britain, France). 


Timetonyx 75 


2. T. miersi (Stebb.) 1888 Hippomedon m., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.681 t.10 | 1898 Anonyx miersü, A. Della Valle in: F. Fl. Neapel. v.20 p. 813. 

Head, lateral angles rounded. Side-plate 1 narrowed below. Pleon 
segment 3, postero-lateral angles rounded, almost quadrate. Eyes doubtful. 
Antenna 1, flagellum with 11 joints, 1° very large, accessory flagellum 4-jointed. 
Antenna 2 in J, ultimate joint of pedunele longer than penultimate, flagellum 
38-jointed. Epistome? Gmnathopod 1, 34 joint not longer than 4%, 6th rather 
longer than 5!%. Gmathopod 2, 6tt joint not half as long as 5t", apically a little 
produced. Branchial vesieles, with approximation to Anonyx (p. 53), showing 
some irregular folds. Uropod 3, inner ramus shorter than basal joint of outer, 
each carrying-a fringe of very long plumose setae. Telson much longer than 
broad, cleft about *, of the length, with 2 pairs of marginal spinules and 
1 pair in the broad emarginate apices. L. about 12 mm. 

Bass Strait (Bast Moneoeur Island). Depth 68 m. 


3. T. acutus (O. Sars) 1891 Hoplonyx a., G. ©. Sars, Crust. Norway, v.1 p.95 
t.33 f.2 | 1898 Anonyx eicada (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 833. 


- Head, lateral angles much and very acutely produced. Side-plate 1 
neither narrowed nor expanded below, 4!" much expanded into a narrow obtuse, 
lobe. Pleon segment 3, postero-lateral angles scarcely produced, quadrate. 
Eyes as in T. similis (p. 76). Gnathopod 1, palm straight. Gnathopod 2, 6!" joint 
fully half as long as 5%, palm obliquely truncate, finger stronger than 
usual. Uropod 3, rami nearly equal in length. Telson with 2 pairs of 
dorsal spinules. Eggs in pouch orange-coloured. L. © 13 mm. — Other 
points in practical agreement with the account given of T. similis (p. 76). 


North-Atlantie (West-Norway). 


4. T. albidus (O. Sars) 1891 Hoplonyx a., G. O. Sars, Crust. Norway, v.1 p.96 
t..33 £.3 | 1893 Anonyx a., A. Della Valle in: F. Fl. Neapel, v.20 p. 826. 


Head, lateral angles nearly quadrate. Side-plate 1 narrowed below, 
4th expanded into a short broad quadrate lobe. Pleon segment 3, postero- 
lateral angles not at all produced, quadrate, 4" deeply depressed dorsally. 
Eyes large, scarcely prolonged backward as in other species, visual elements 
indistinet, pigment light red. Antenna 1 in O, flagellum 15-jointed, accessory 
flagellum 8-jointed. Antenna 2 considerably longer than antenna 1, flagellum 
28-jointed. Epistome much projecting, obtusely angled. Gnathopod 1, 6! joint 
subequal to 5t%, palm indistinctly defined below. Gmathopod 2, 6!" joint 
more than half length of 5tt, narrow. Peraeopods 3—5 shorter than usual, 
. 24 joint very large. Uropod 3, rami rather broad, inner shorter than outer. 
Telson not twice as long as broad, with 2 pairs of dorsal spinules. Colour 
whitish, not tinged with red, eggs in pouch bright red. L. © 12 mm. 

Aretie Ocean, North-Atlantie and North-Sea (North- and West-Norway). Depth 
150—282 m. 


5. T. cicadoides (Stebb.) 1888 Anonyax c., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.612 t.4,5 | 1891 A. c., Hoplony« (part.), G. O. Sars, Crust. Norway, v.1 p.92 | 
1893 Ichnopus sp.? + A. nugax (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 835. 


Head, lateral angles a little produced, rounded. Side-plate 1 expanded 
below, 4% expanded into a rather narrow rounded lobe. Pleon segment 3, 
postero-lateral angles much produced, acutely upturned. Character of eyes 
uncertain. Antenna 1 in O, flagellum with 20 joints, 1° not very large, 
accessory flagellum with 9 joints, 1° not very long. Antenna 2 in ©, ultimate 
and penultimate joints of peduncle subequal, flagellum 30-jointed. Antenna 2 


76 Timetonyx 


in d, ultimate joint of pedunele longer thän penultimate, flagellum with 50 joints, 
most with calceoli as in flagellum of antenna 1. Maxilla 1, 10 spine-teeth on 
apex of palp. Maxillipeds, 5 small spines on apical border of outer plates. 
Gmathopod 1, 6" joint longer than 5%, palm very oblique and very ill-defined. 
Gnathopod 2, 6t" joint not half as long as 5t%, narrow, with a little convex 
palm. Uropod 2, inner ramus strongly econstrieted. Uropod 3, rami narrowly 
lanceolate, carrying spinules and setae, inner scarcely longer than basal joint 
of outer. Telson not quite twice as long as broad, cleft nearly to base, with 
3 pairs of dorsal spinules, and outer angle of each apex produced into. a 
small tooth. Some specimens in spirit, of a deep brown colour, others 
cream-coloured. L. 18 mm. 


Southern Indian Ocean (Kerguelen Island). Depth 36—228 m. 


6. T. similis (O. Sars) 1891 Hoplony« s., G. O. Sars, Crust. Norway, v.1 p. 93 
t.33 f.1 | 1898 Anonyx cicada (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 833. 


Head, lateral angles not rounded. Side-plate 1 narrowed below, 
4th expanded into a short, broad, rather squared lobe. Pleon segment 3, postero- 
lateral angles acutely produced. Eyes angled, upper arm very narrow, lower 
bulb-like, bright red. Antenna 1 in © rather more slender than in T. eicada 
(p. 74), flagellum with 20 joints, 1° rather large, accessory flagellum 6-jointed. 
Antenna 2 in 9 little longer than antenna 1, flagellum 24-jointed. Epistome 
somewhat more projecting than in T. cieada. Gnathopod 1, 6!% joint a 
little longer than 5%, palm slightly flexuous, defined by an obtuse angle. 
Gnathopod 2, 6t joint scarce half as long as 5". TUropod 3, inner ramus 
distinetly longer than basal joint of outer. Telson about twice as long as 
broad, deeply cleft, with only 1 pair of dorsal spinules. Pellueid, with faint 
tinge of pale reddish yellow. L. 14 mm. 

Arctic Ocean, North-Atlantie and North-Sea (West-Norway, Scotland). Depth 
38-—282 m. 


7. T. leucophthalmus (0. Sars) 1891 Hoplonyx l., G.O.Sars, Crust. Norway, 
v1 p.97 t.34 f.1| 1893 Anonyx cicada (part.), A. Della Valle in:  F, Fl. Neapel, 
v.20 p. 833. 


Head, lateral angles obtusely projecting. Side-plate 1 slightly narrowed 
below, 4 rather broadly and squarely expanded. Pleon segment 3, postero- 
lateral angles rather sharply produced. Eyes angled, narrow, without distinet 
visual elements, pigment whitish. Antenna 1 in Q, flagellum with 18 joints, 
1° rather long, accessory flagellum 6-jointed. Antenna 2 in © little longer 
than antenna 1. Epistome much projecting, evenly rounded. Gnathopod 1, 
6 joint as long as 5th, palm flexuous, defined by an indistinet obtuse 
angle. Gmathopod 2, 6% joint short and broad, not half length of 5", palm 
transverse,. Peraeopods rather long and slender. Uropod 3, inner ramus 
scarcely longer than basal joint of outer. Telson not nearly twice as long 
as broad, with only one pair of. dorsal spinules. Colour pale reddish yellow, 
pinkish in front. L. © 15 mm. 

Hardangerfjord and Trondhjemsfjord. Depth to 282 m. 

8. T. caeculus (0. Sars) 1891 Hoplonyx c., G. O. Sars, Crust. Norway, v.1l 
p-98 t.35 £.1 | 1895 Anonyx& cicada (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.833. 

Head, lateral angles acutely projecting. Side-plate 1 scarcely narrowed 
below, 4 with expansion short, broad, obtuse. Pleon segment 3, postero- 
lateral angles acutely upturned, 4" with rounded carina behind the dorsal 
depression. Eyes wholly wanting. Antenna 1, flagellum with 11 joints, 1° very 


Tmetonyx, Tryphosites 77 


large, accessory flagellum with 4 joints, 1% long. Epistome scarcely projecting 
in front of upper lip, but defined. from it by distinet ineision. Gnathopod 1, 
34 joint less elongate than in other species, 6!" joint as long as 5tk, palm 
very oblique, finely denticulate, defined by obtuse angle. Gmathopod 2, 
6! joint oblong oval, more than half as long as 5tt, palm transverse. 
Peraeopods rather slender, 7! joint long and narrow. Peraeopod 5, 24 joint 
very large, as long as rest of limb. Uropod 3, rami narrow, mucroniform, 
without the marginal setae found in the other species, the outer the longer, 
with spiniform 24 joint. Telson not nearly twice as long as broad, deeply 
eleft, with 1 or 2 pairs of dorsal spinules. Body pellueid whitish, unpigmented. 
L. 9 5 mm. 


Trondhjemsfjord. Depth about 280 m. 


46. Gen. Tryphosites O. Sars 


1871 Tryphosa (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p. 117 | 1891 
Tryphosites (Sp. typ.: Anonys longipes), &. O. Sars, Crust. Norway, v.1 p.81. 


Side-plate 1 of uniform width. Pleon segment 3, postero-lateral angles 
acutely upturned. Antenna 1, accessory flagellum rather small, antennae 1 
and 2 subequal in Q, antenna 1 ind long, antenna 2 very long. Epistome 
produced into an acutely lanceolate process. Mandible with prominent 
molar, palp slender, affixed scarcely behind it. Maxilla 1, inner plate not 
very short, otherwise as in Tryphosa (p. 68). Maxilla 2, plates moderately wide, 
inner plate a little the shorter. Maxillipeds, outer plates large, reaching much 
beyond 24 joint of palp, fringed with small spine-teeth. Gnathopod 1 slender, 
subchelate, 6!" joint shorter than 5%, Gmathopod 2 slender, subchelate, 
6th joint nearly fusiform, much more than half length of linear 5tk. Peraeo- 
pods slender, long. Peraeopods 3—5, 24 joint much expanded. Uropod 2, 
inner branch constrieted. Uropod 3 rather large, inner ramus a little longer 
than basal joint of outer, both carrying spinules and setae in both sexes. 
Telson deeply cleft. 


1 species. 


1. T. longipes (Bate & Westw.) 1861 Anonya Il. + A. ampulla (err., non 
Cancer a. Phipps 1774!), Bate & Westwood, Brit. sess. Crust., v.1 p.113 f.; p.116 f£. | 
1862 A. 1. + A.a., Bate, Cat. Amphip. Brit. Mus., p.79 t.13 f£.4,5 | 1871 T’ryphosa I,, 
A. Boeck in: Forh. Selsk. Christian., 1870 p.118 | 1891 T’rryphosites l., G. O. Sars, Crust. 
Norway, v.l p.81 t.28 f.3; t.29 f.1 | 1898 Anonyx I., A. Della Valle in: F. Fl. Neapel, 
v.20 p.830. 


Head, lateral angles a little produced, acute. Side-plate 5 much 
broader than deep. Pleon segment 4 with no dorsal projection. Eyes oval, 
not very large, light red. Antenna 1 in oO, flagellum with 18 joints, 1° very large, 
accessory flagellum 5-jointed; flagellum in S 30-jointed. Antenna 2, pen- 
ultimate joint of peduncle rather expanded, flagellum in © 15-jointed, in C 
filiform, longer than the body. Gnathopod 1, 6!" joint of uniform width, palm 
slightly oblique. Peraeopods 1 and 2 very setose on hind margin. Telson 
only slightly tapering, carrying 3 pairs of marginal spinules and 3 pairs 
on the truncate apices. Body whitish pellueid. L. 12 mm. 


Arctie Ocean, North-Atlantic, North-Sea, Skagerrak, Kattegat and Baltie (Norway, 
Denmark, Great Britain, West-France); Mediterranean. 


78 Lepidepecreum 


47. Gen. Lepidepecreum Bate & Westw. 


1868 Lepidepecreum, Bate & Westwood, Brit. sess. Crust., v.2 p.509 | 1888 L,, 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.686 | 1891 L., G. O. Sars, Crust. Norway, 
v.1 p.112 | 1871 Orchomene (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p. 114. 


Body carinate, asarule extensively, integument firm, calcareous,. Antennal, 
1° joint usually carinate, produced (Fig. 12). Antenna 2 in Q not longer than 
antenna 1, antepenultimate joint of peduncle rather 
long, in g flagellum slender, very elongate. Epistome 
forming a broad compressed plate projecting in front 
Padändi, of upper lip. Mandible, molar 
joint ı. slight, palp slender, affıxed far 

back. Maxilla 1, inner plate with 
2 setae, outer with almost trans- 
verse apex. Maxilla 2, plates 
rather elongate, inner narrower 
and a little shorter than outer. 
a Maxillipeds, outer plates reaching Br 

re beyond 24 joint of palp. Gmatho- I. 9 
er e pod 1 subchelate, 6tk joint narrow. ea ne he 
tAfter 6, O. Bara.] Gnathopod 2 minutely chelate. [After 6. 0. Bars.) 

Peraeopods 1 and 2 slender. 
Peraeopods 3—5, 22 joint large. Uropod 3, rami in O scarcely reaching beyond 
uropod 2, with few setae or none, in d much larger, densely setose on 
inner margin (Fig. 13). Telson conically attenuated, cleft (Fig. 13). 


5 species. 


Synopsis of species: 


f Darina of small extent . : „u... una 1. L. typhlops. . . . p.78 


1 | Carina of great extent — 2. 


Telson not eleft beyond the centre . ..... 2. L. foraminiferum . p.79 


2 | Telson cleft beyond the centre — 3. 


a RR REN DER ME ET 3. L. clypeatum . . . p.79 
Peraeopod 5, 24 joint not greatiy produced, down- 
ward — 4. 


Side-plate 5 not deeper than broad . ..... 4. L. longicorne. . . p.80 
Side-plate 5 deeper than broad ... ..... ER p- 80 


= 


( 5, 24 joint greatly produced down- 
ai 

1. L. typhlops Bonnier 1896 L. t., J. Bonnier in: Ann. Univ. Lyon, v.26 
p- 621 t. 86 £.2. 


Back somewhat rounded, not carinate, apparently with single exception 
of pleon segment 4, which is raised into a sharp, apically upward pointing 
keel, and in C, but not in Q, has a deep transverse sinus. Head very narrow, 
rostrum small, lateral corners greatly produced into a narrow, somewhat 
downward directed, apically rounded lobe. Side-plates 1—4 very large; pleon 
segment 3, postero-lateral corners quadrate. Eyes entirely wanting. Antenna I, 
1 joint large, scarcely produced apically, rest disposed at right angles to Ist, 
flagellum in 9 with 6 joints, with some calceoli, 1 joint longer than other 
5 combined, in O with 5 joints, 1° not very long; accessory flagellum very small, 
2-jointed. Antenna 2 in J as long as body, ultimate and penultimate joints of 


nr Fe 


u 
ET RE EN 


gl Sad ri grad m irn + Man Eu a ne De Fa ae 
° 


na a an a gl 
d Bir u 


Lepidepeereum 79 


peduncle equal, each narrower and a little shorter than antepenultimate; flagellum 
with many short joints, each with a calceolus. Epistome carinate with 2 successive 
apices above, below dividing into two keels. Maxilla 1, outer plate apically 
carrying 12 spines. Gnathopod 1, side-plate said to be almost as long as the 
remainder of the appendage (but?), 5tk and 6tk joints equal, margins parallel, 
palm small, well defined. Gnathopod 2 longer, very slender, 6t% joint in- 
flated at the distal end, which prolongs itself in a rounded lobe beyond the 


‚finger. Peraeopods land 2, 5t% joint shorter than 6%, finger long. Peraeopod 5, 
8 p J 8 g p 


24 joint broader and longer than in preceding peraeopods. Uropods 1 and 2 with 
few spines on the rami; uropod 3, outer ramus 2-jointed, fringed in S, notin ©, 
with long setae on inner margin, inner ramus carrying 3 spines and 2 setae. 
Telson long, deeply eleft, with a pair of apical spinules. L. about 6 mm. 


Bay of Biscay. Depth 650—950 m. 


2. L. foraminiferum Stebb. 1888 L. f., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.686 t.24 | 1893 Anonyac longicornis (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p.814. 


Carina extending from 24 joint of antenna 1 to pleon segment 4, on 
peraeon segments 6 and 7 and pleon segments 1—3 the ridge forming a small 
distal tooth. Head slightly rostrate, lateral angles outdrawn into long 
narrow lobes ending obtusely.“ Side-plate 5 with breadth and depth sub- 
equal. Pleon segment 3, postero-lateral angles acute, slightly upturned, 
segment 4 forming a strong upturned carinal tooth. Eyes not perceived. 
Antenna 1 inO, flagellum with 5 joints, 1° not very large, accessory flagellum 
2-jointed; in CO, flagellum with 6 joints, 1% large, accessory flagellum 3-jointed, 
slender. Antenna 2 in O, ultimate joint of pedunele shorter tkian either of the 
preceding, in © rather longer than either; flagellum in © with 5 joints, ind with 
many. Epistome projecting. Gnathopod 1, 6" joint nearly as long as Stk, of 
uniform width, palm slightly concave and oblique. Gmnathopod 2, 6tk joint more 
than half length of 5%, both distally widened. Peraeopods 3—5, 24 joint 
large, overlapping 34, in peraeopod 5 very large, much longer than rest of limb, 


. In peraeopods 3—5 4!" joint expanded. Uropod 3, rami rather broad, outer the 


longer, with setae also in ©. Telson cleft not quite to the centre, with 
2 pairs of marginal spinules. L. 5 mm. 


Southern Indian Ocean (Kerguelen Island). Depth 230 m. 


3. L. elypeatum Chevreux 1888 L.c., Chevreux in: Bull. Soe. zool. France, 
v.13 p.40 | 1895 Anonyx longicornis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.814. 


Q. Carina as in L. umbo (p. 80). Head, lateral angles little produced, 
acute. Side-plate 5 of equal breadth and depth. Pleon segment 3, postero- 
lateral angles acute, carina of this and segment 4 produced into a sharp 
strong tooth. Eyes inconspieuous. Antenna 1, 1° joint very stout, produced 
over half length of 24. Antenna 2 subequal to antenna 1, flagellum in 
both short, with long eilia. Gmnathopod 1, 6 joint a little longer than 
5th, palm oblique. Gmnathopod 2, 6*2 joint half length of 5t, distally 
dilated, angle of palm produced. Peraeopods 3 and 4, 24 joint expanded, 
serrate on front margin, produced below 34 joint, 4! much dilated and 
produced. Peraeopod 5, 24 joint very large, produced almost to the end 
of the 6% joint. Telson very elongate, cleft to the base. L. 5mm. — 
d unknown. 


North-Atlantie (lat. 46° N.). Depth 180 m. 


80 Lepidepecreum 


4. L. longicorne (Bate & Westw.) ‚1861 Anonyax longicornis, Bate & Westwood, 
Brit. sess. Crust., v.1 p.91 f. | 1862 A.l., Bate, Cat. Amphip. Brit. Mus., p.72 t.11 
f.4 | 1893 A.l. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.814 t.60 £.47—49 | 1888 
Lepidepecreum longicorne, T. Stebbing in: Rep. Voy. Challenger, v.29 p.373 | 1868 
L. carinatum + Anonya longicornis, Bate & Westwood, Brit. sess. Crust., v.2 p. 509, 
510f. | 1891 & 95 L. c., G. O. Sars, Crust. Norway, v.1 p.113 t.38 f.2; t.39 £.1; p.687 | 
1890 L. mirabile, Meinert in: Udb. Hauchs, v.3 p.153 t.1 f. 7—12. 


Dorsal carina extending from 24 joint of antenna 1 back to 4t" segment 
of pleon. Head slightly rostrate, lateral angles produced to large slightly 
deflexed linguiform lobes. Side-plates 4—6 carinate near the base, 5th 
quadrate, not deeper than broad. Pleon segment 3, postero-lateral angles 
quadrate, dorsal carina of this and of segment 4 acutely produced. Eyes oval, 
larger in J than in O, reddish with opaque white coating. Antenna 1 inO, 
1° joint large, its dorsal carina .jutting out over 24 joint, which on a smaller 
scale is similar, flagellum short, with 7 joints, 1° not large, accessory flagellum 
wanting. Antenna 1 in C a little larger, 24 joint scarcely produced, flagellum 
with 9 joints, 1° very large (Fig. 12). Antenna 2 in © shorter than antenna 1, 
ultimate joint of peduncle shorter than penultimate or antepenultimate, flagellum 
4-jointed. Antenna 2 in GO, ultimate joint of peduncle as long as either of 
2 preceding joints, flagellum as long as body. Epistome laxge, nearly rectangular. 
Gnathopod 1, 6% joint shorter than 5t", of nearly uniform width. Gnathopod 2 
very slender, 6! joint more than half length of 5%, oblong triangular. 
Peraeopod 3, 24 joint rounded, 4% expanded. Peraeopods 4 and 5, 24 joint oval, 
narrowed below, 4! expanded. Uropod 3, rami very nearly equal (Fig. 13), 
in © without setae. Telson narrow and long, nearly 3 times as long as 
broad, deeply cleft, apices elosely adjacent, acute (Fig. 13). Colour chalky 
white, with dorsal orange patch on each segment. L. 9 7, 0 8 mm. 


North-Atlantie, North-Sea, Skagerrak, Kattegat and Baltic (South-Norway, Denmark, 
France, Great. Britain); Mediterranean. 


5. L. umbo (Goös) 1866 Lysianassa u., Goes in: Öfv. Ak. Förh., v.22 p. 520 
t.37 £.6 | 1871 .Orchomene w., A. Boeck in: Forh. Selsk. Christian., 1870 p.117 | 1882 
Lepidepecreum u., G. ©. Sars in: Forh. Selsk. Christian., nr. 18 p.81 | 1891 L. u., G.O. 
Sars, Orust. Norway, v.1 p.115 t.39 f.2 | 1898 Anonyx u., A. Della Valle in: F. Fl. 
Neapel, v.20 p. 815. 


Dorsal carina extending from 1° joint. of antenna 1 to 4" pleon segment. 
Head, lateral angles acutely produced. Side-plates large and deep, 5t" oval, 
much deeper than broad, lower hind corner produced downward, the centre 
forming a conspicuous boss. Pleon segment 3, postero-lateral angles quadrate, 
minutely produced, carinate process of this and segment 4 acutely upturned. 
Eyes narrow oblong, red. Antenna 1, only 1° joint produced at apex, 
flagellum in © with 8 joints, 1° of moderate size, accessory flagellum 3-jointed, 
very small. Antenna 2 in © nearly as long as antenna 1, flagellum 8-jointed. 
Antenna of S modified as in L. longicorne. Epistome obtusely rounded in 
front. Gmathopod 1, 6% joint about as long as 5t", slightly widened distally. 
Gnathopod 2, 5th joint considerably expanded distally, and 6" rather stouter 
than in L. longicorne. Peraeopods 3—5, 24 joint not narrowed below, 4 
not expanded. Uropod 3, inner ramus notably shorter than outer; outer in Q * 
carıying 2 setae. Telson oblong triangular, scarcely twice as long as broad, 
deeply cleft, apices acute. Colour bright carneous red. L. Q 11 mm. 


Ärctie Ocean, North-Atlantie (Southernmost range, Brönösund [Nordland]). Depth 
58—188 m, 


Orchomenella 81 


48. Gen. Orchomenella O0. Sars 


1871 Orchomene (part.) + Tryphosa (part.), A. Boeck in: Forh. Selsk. Christian, 
1870 p. 114, 117 | 1890 & 95 Orchomenella (part.), G. O. Sars, Crust. Norway, v.1 p. 66; 
p- 683 | 1894 O., T. Stebbing in: Bijdr. Dierk., v.17 p.6. 

Side-plates large. Antenna 1, accessory flagellum moderately developed. 
Antenna 2 in O little longer than antenna 1, in Q' not greatly elongated. 
Epistome little or not projeeting beyond upper lip. Mouth-organs nearly as 
in Orchomene (p. 44), molar of mandible rather stronger, outer plate of maxilla 1 
more obliquely truneate, inner and outer plates of maxillipeds shorter and 
palp longer. Gnathopods, peraeopods and uropod 3 in O as in Orchomene, 
uropod 3 in J nearly the same as in O, telson larger than in Orchomene, 
oblong triangular, eleft extending beyond the centre, scarcely dehiscent. 


5 species. 
Synopsis of species: 


1 f Epistome not at all prominent — 2. 
\ Epistome rather prominent — 4. 


Pn| re 1: O,1lsevVis; .: .:» p:8l 
a Eyes present — 3. 

3 { Side-plate 5 scarcely produced downward behind. . 2. O.nanus . . .p.8l 

Side-plate 5 produced downward behind ..... 3. O. pinguis.. . . p.82 

| Side-plate 5 deeper than broad, produced downward 4. O.minuta . . . p.82 

Side-plate 5 broader than deep, not produced . 5. ©. groenlandida p. 83 


1. O.laevis Bonnier 1896 O.1., J. Bonnier in: Ann. Univ. Lyon, v.26 p.617 
1.35 £.5. 

‚Pleon segment 4 witn deep dorsal depression. Head, lateral corners 
sharply produced. Pleon segment 3, postero-lateral corners strongly produced, 
apparently subacute. Eyes entirely wanting. Antenna 1 in J short, 24 and 
34 joints very short, flagellum without calceoli, with 11 joints, 1° not very long, 
shorter than accessory flagellum. Antenna 2 nearly as long as body, with 
a calceolus on each joint. Epistome with crest not projecting in front of 

- upper lip. Lower lip, mandibular processes acute. Maxilla 1, 24 joint of 
palp with 6 spines on apical margin. Maxilla 2 (in fig.), inner plate shorter 
than outer. Maxillipeds, outer plates fully reaching end of palp’s 24 joint, inner 
margin erenulate, apical carrying a spine and 4 setae. Gnathopod 1, 5th joint 
subequal to 6, 6th oblong, the short oblique palm defined by a spine at the 

.. angle. Gnathopod 2, 5tk joint not nearly twice as long as the subchelate 6th, 
Peraeopods 1 and 2, finger longer than 6" joint. Peraeopods 3—5 successively 
shorter (text, but in fig. 4th the longest), 24 joint oblong oval in peraeopods 3 
and 4, much more expanded in peraeopod 5, very broad and longer than the 
remaining joints combined. Uropods 1 and 2 short, rami as long as peduncle; 
| uropod 3 much longer, inner ramus with 3 spines on inner margin, outer 
E much longer, 2-jointed, with 3 spines on outer margin. Telson _ deeply 
‚left, with a pair of lateral and a pair of apical spines. L.5 mm. 


Bay of Biseay. Depth 950 m. 


[ 2. O. nanus (Kreyer) 1846 Anonyx n., Kroyer in: Naturh. Tidsskr., ser. 2 
E »0.2 p.30 | 1846 A.n., Kroyer in: Voy. Nord, Crust. t.17 f.2a—t | ?1893 A.n. (part.), 
j A. Della Valle in: F. Fl. Neapel, v.20 p.820 | 1871 Tryphosa n., A. Boeck in: Forh. 
; Selsk. Christian., 1870 p.117 | 1893 7. nana, J. Bonnier in: Bull. sei. France Belgique, 
} v.24 p.170, 191 t.7 | 1895 Orchomenella n. (Anonyx namus, laps.!), G. ©. Sars, Crust. 
3 Norway, v.1 p. 683 | 1882 Tryphosa eiliata, G. O. Sars in: Forh. Selsk. Christian., nr. 18 
F p:-81 t.3 f.4 | 1891 Orchomenella c., G. O. Sars, Crust. Norway, v.1 p.69 t.25 f.2. 


Das Tierreich. 21. Lief.: T.R. R. Stebbing, Amphipoda I. 6 


EN a re 


82 | Orchomenella 


Head, lateral angles broadly rounded in Q, narrower in d. Side- 
plate 1 of uniform width, 5% of equal breadth and depth, lower hinder angle 
scarcely produced. Pleon segment 3, postero-lateral angles rounded, hind margin 
smooth, 4 segment with deep dorsal depression. Eyes large, oval, widened 
below, light red. Antenna 1, flagellum in 9 with 8 joints, in 9 with 12, 1°tlarge 
and hirsute, accessory flagellum with 3 joints, 1° long, slightly dilated, hirsute. 
Antenna 2 in Q little longer than antenna 1, in JS about once and a half as 
long. Epistome flattened in front, not projecting beyond upper lip. Gnathopod 1 
rather robust, 6! joint a little longer than 5%, slightly tapering, palm 
transverse. Gnathopod 2, 6!" joint oval, fully half as long as 5t, obtusely 
produced beneath the minute finger. Peraeopods 3—5, 24 joint nearly as 
long as rest of leg. Uropod 3 in Q, inner ramus not longer than basal joint 
of outer. Telson rather broad, triangular, with 1 pair of marginal spinules, 
cleft narrow, extending beyond the centre. Colour greyish white. L. Q 
over 5 mm. 4 


North-Atlantie, North-Sea and Fb (South-Norway, France, Holland, 
Great Britain). 


3. O. pinguis (Boeck) 1861 Anonya p., A. Boeck in: Forh. Skand. Naturf., 
Mode 8 p.642 | 1893 A. p., A. Della Valle in: F. Fl. Neapel, v.20 p. 821 t. 28 f.22—35 | 
1871 Orchomene pingvis, A. Boeck in: Forh. Selsk. Christian., 1870 p.115 | 1872 & 76 
O.p., A. Boeck, Skand. Arkt. Amphip., v.1t.5 f.1; v.2 p.176 | 1890 &95 Orchomenella p., 
G. O. Sars, Crust. Norway, v.1 p.67 t.24 f.2; p.683 | 1893 Tryphosa pinguis, J. 
Bonnier in: Bull. sci. France Belgique, v.24 p. 196. / 


Head, lateral angles narrowly rounded, produced. Side-plate 1 a little 
expanded or narrowed (Della Valle) below, 5t" deeper than wide, produced 
downward behind. Pleon segment 3, postero-lateral angles scarcely rounded, 
hind margin minutely erenulate or smooth (Della Valle). Eyes narrow, reniform, 
light red. Antenna 1, flagellum with 8—11 joints, 1° large, hirsute, accessory 
flagellum with 4 jvints. Antenna 2 in © decidedly longer than antenna 1, 
flagellum with 15 joints, in S with 20 joints. Epistome scarcely projecting in 
front of upper lip, defined from it by distinet ineision. Gnathopod 1 rather short 
and stout, 6% joint much longer than 5t%, tapering to the transverse palm. 
Peraeopods 3—5, 24 joint shorter than the rest of the limb. Uropod 3, 
inner ramus scarcely as long as basal joint of outer, which in Q has 3 setae 
on inner margin. Telson tapering, with 2 pairs of marginal spinules, cleft 
usually extending beyond the centre, scarcely dehiscent. Colour whitish. 
L. 9 4—7'5 mm. 

Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (Siberia, Baus: and West- 
Norway, Malangenfjord [Finmark]); Mediterranean. 


4. O. minuta (Kroyer) 1846 Anonyx minutus, Kreyer in: Naturh. Tidsskr., 
ser.2 v.2 p.23 , 1846 A. m., Kreyer in: Voy. Nord, Crust. t.18 f.2a—t | 1893 A. m., 
A. Della Valle, in: F. Fl. Neapel, v.20 p. 826 | 1866 Lysianassa minuta, Goös in: Öfv. 
Ak. Förh., v. 22 p. 520 | 1871 Orchomene minutus, A. Boeck in: Forh. Selsk. Christian., 
1870 p. 116 | 1893 O. m., J. Bonnier in: Bull. sei. France Belgique, v.24 p. 194 | 1890 & 
95 Orchomenella minuta, G. ©. Sars, Crust. Norway, v.1 p.66 t.24 f.1; p.683 | 1895 
O. m., Ohlin in: Acta Univ. Lund., v.31 nr. 6 p.22 | 1894 O. minutus, T. Stebbing in: 
Bijdr. Dierk., v.17 p. 6. 


Head, lateral angles in. 9 almost quadrate, in e) rather narrow and 
acute. Side-plate 1 of uniform widtb, 5tk deeper than broad, produced 
downward behind in triangular lobe. Pleon segment 3, postero-lateral angles 
a very little produced, hind margin smooth, 4! segment with shallow dorsal 


“ 


eg an. —4u 3 


Orchomenella, Orehomenopsis "83 


depression. Eyes oval, slightly widened below, light red. Antenna 1, flagellum in 
O with 10 joints, accessory flagellum with 4 or 5. Antenna 2 in 9 little longer 
than antenna 1, flagellum with 10—12 joints, much longer in S. Epistome 
slightly projecting in front of upper lip, evenly rounded. Gnathopod 1 not 
robust, 6! joint scarcely longer than 5t%, palm very slightly oblique. Gmnatho- 
pod 2, palm produced beneath the minute finger. Peraeopods 3—5 unusually 
short, 24 joint large, as long as rest of limb, 7*k joint very small. Uropod 3, 
inner ramus as long as basal joint of outer, which in O has 1 seta on inner 
margin. Telson nearly twice as long as broad, carrying 2 pairs of marginal 
spinules, cleft extending beyond the centre, apically dehiscent. Colour pale 
yellowish red, with orange speck at corners of each segment. L. © 6 (Sars), 
reaching 11 mm (Ohlin). 

Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (whole Norway). British 
and Mediterranean localities remain doubtful. Depth 2—112 m. 


5. O. groenlandica (H. J. Hansen) 1887 Anonyx groenlandieus, H. J. Hansen 
in: Vid. Meddel, ser.4 v.9 p.72 t.2 f.5—5g | 1893 A.g., A. Della Valle in: F. Fl. 
Neapel, v.20 p.832 | 1891 & 95 Orchomenella groenlandica, G. OÖ. Sars, Crust. Norway, 
v.1 p.70 t.26 f.1; p. 684 | 1893 Ze J. Bonnier in: Bull. sei. France Belgique, 
v.24 p. 194. 

Head, lateral corners slightly projeeting, subangular (Sars), rounded 
(Hansen). Side-plate 1 narrowed below, 5t% broader than deep, not produced. 
behind. Pleon segment 3, angles upturned, acute, 4% with deep depression and 
low carina ending acutely. Eyes oval, widened below, visual elements imperfectly 
developed, pigment dark red with opaque white coating. Antenna 1, flagellum in 
9 with 8, in C with 14 joints, 1° rather large, accessory flagellum with 4 joints, 


IR long. Antenna 2 in © scarcely longer than antenna 1, not nearly twice as 


long in d. Epistome considerably projeeting in front of upper lip (as in Orcho- 
mene, p.44), evenly rounded. Mandible rather stout. Gnatho- 
pod 1, 6% joint longer than 5tt, scarcely tapering, palm trans- 
verse. Gnathopod 2 subehelate, 6‘ joint half length of 5th, 
slightly produced at angle of palm. Peraeopods 3—5 of 
moderate length, 24 joint large, 4 little widened. Uropod 2, 
inner ramus constrieted. Uropod 3, inner ramus in © nearly as 
long as outer, in d somewhat larger, with both rami setose on 
inner margin. Telson oblong oval, nearly twice as long as broad, 
with 2 pairs of marginal spinules, eleft narrow, extending beyond 
the centre. Colour whitish, pellueid. L. 7 mm. 


Arctic Ocean. Depth 19—94 m. 


49. Gen. Orchomenopsis 0. Sars 


1891 Orchomenopsis, G. O. Sars, Crust. Norway, v.1 p. 73 | 1893 
O., J. Bonnier in: Bull. sei. France Belgique, v.24 p.174. 

Head, lateral angl&ös rounded. Side-plate 1 expanded 
below, 4% with rather short obtuse expansion. Pleon segment 3, 47 
postero-lateral angles not produced. Antenna 1, pedunele 9 7 / 
stout, 24 and 34 joints very short, accessory flagellum well nr 
developed. Antenna 2 notably longer than antenna 1. Epistome Oo. ne 
not projeeting. Mandible strong, molar weak, much ceiliated, Pleopod with 
palp set far back, its 1% joint short. Maxilla 1, 2 setae on narrow  ""nacula. 
inner plate, 11 spines on broad obliquely truncate outer plate, many spine-teeth 
on apex of palp. Maxilla 2, plates rather long and narrow, somewhat acuminate 

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84 Örchomenopsis 


apically. Maxillipeds, outer plates oval, with little nodulous teeth on inner 
margin, length of plates compared with joints of palp a little variable. Gnatho- 
pod 1 powerful, subchelate, 6" joint eonsiderably longer than 5t®, palm transverse, 
well defined. Gmathopod 2, 5!" joint rather expanded, 6!" narrower, about 
half length of 5t%. Peraeopods strong, 24 joint of peraeopods 3—5 moderately 
expanded, narrowed below. Uropod 3, rami projeeting beyond uropod 2, 
setiferous. Telson more or less tapering and more or less deeply cleft. 


4 species. 


Synopsis of species: 


1 f Cleft of telson not quite reaching the centre... . .. 1. O. musculosa . p.84 
eft of telson extending beyond the centre — 2. 
Cleft of tel ding beyond th 
-f Gnathopod 2 minutely chelate . ... 2.2... 2. O. abyssorum . p.84 
\ Gnathopod 2 subehelate — 3. 
3 f Cleft of telson not dehiscent . - . . -» 2.2... 3. O. obtusa . . . p.85 
1 Cheit :0f telson -dehiscens. nn rn Ber 4. O.zschauii . . p.85 


1. ©. musculosa (Stebb.) 1888 Orchomene musculosus, T. Stebbing in: Rep. 
Voy. Challenger, ©. 29 p. 673 t.20 | 1891 O. m., Orchomenopsis (part.), G. ©. Sars, Crust. 
Norway, v.1l p.74 | 1893 Anonyx m., A. Della Valle in: F. Fl. Neapel, v.20 p. 823. 


Side-plate 5 deeper behind than in front. Pleon segment 3, postero-lateral 
angles much rounded. Antenna 1, flagellum with 11 joints, 1st large, accessory 
flagellum with 4 joints, 1° long. Antenna 2, ultimate and penultimate joints 
of peduncle subequal, flagellum with 13 joints. Maxilla 1, one palp with 11, 
the other with 8 spine-teeth. Maxillipeds, inner plates with apieal margin 
excavate, outer plates reaching beyond 24 joint of palp, with 2 spine-teeth on 
apical margin. Gnathopod 1, 24 joint short and massive, not longer than 5t" and 
sth combined, 5" short, cup-shaped, 6!" oblong, thickest near base, hind margin 
slightly concave, palm transverse, with accurately fitting finger. Gnathopod 2, 
6 joint very little apically produced. Uropod 3, rami nearly equal. Telson twice 
as long as broad, with a pair of dorsal and a pair of apical spinules, eleft 
not quite reaching centre, slightly dehiscent throughout. L. about 12 mm. 


North-Paeifie (South of Japan). Surface. 


2. O.abyssorum (Stebb.) ?1865 Anonyx chilensis, Cam. Heller in: Reise 
Novara, v. 2111 Crust. p.129 t.11 f.5 | 1888 Orchomene abyssorum, T. Stebbing in: 
Rep. Voy. Challenger, v.29 p. 676 t.21 | 1891 O.a., Orchomenopsis (part.), G. O. Sars, 
Crust. Norway, v.1 p.74 | 1893 Anonyx& a., A. Della Valle in: F. Fl. Neapel, v.20 p.824. 


Side-plate 5 not deeper behind than in front. Pleon segment 3, postero- 
lateral angles slightly rounded. Antenna 1 similar to that of O. musculosa. 
Antenna 2, ultimate joint of peduncle shorter than penultimate, equal to 
antepenultimate, flagellum with 15 joints. Mandible, 24 joint of palp longer 
than in OÖ. musculosa, but mouth-organs of the two species in close agreement. 
Gnathopod 1 similar to that of O. musculosa, but of slighter construetion, the 
side-plate less expanded below, and the joints more slender. Gnathopod 2, the 
slender 6!" joint strongly produced at apex to form a little chela with the 
minute finger. Pleopods, coupling spines very small, yet with 3 retroverted 
teeth below the terminal hook; 6 or 7 eleft spines on inner ramus (Fig. 14). 
Uropod 3, outer ramus pretty distinetly longer than inner. Telson nearly 
twice as long as broad, with 3 pairs of marginal and 1 of apical spinules, 
eleft extending beyond the middle, dehiscent. L. about 9 mm. 


South-Atlantie (Buenos Ayres), depth 3578 m; South-Paeifie (Chili). 


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Orchomenopsis, Lysianassidarum genera dubia et species dubiae 85 


3. O. obtusa O.Sars 1891 & 95 O. o., G. O. Sars, Urust. Norway, v.l p.74 t.26 
f.2; p. 684 | 1893 Anonyx obtusus, A. Della Valle in: F. Fl. Neapel, v.20 p. 824, 

Side-plate 5 not deeper behind than in front. Pleon segment 3, postero- 
lateral angles smoothly rounded, 4 forming behind the dorsal depression a 
rounded carina. Eyes rather large, irregularly oval, light red. Antenna 1 
nearly as in preceding species, flagellum with 10 joints, accessory flagellum 
with 5 joints. Antenna 2, ultimate joint of peduncle shorter than penultimate, 
flagellum with 18 joints. Maxillipeds, inner plates with apical margin not 
excavate. Gmnathopod 1, intermediate in robustness between the 2 preceding 
species, structure similar, except 34 joint slightly longer. Gnathopod 2, 6% joint 
not suffieiently produced to be considered chelate. Uropod 3, inner ramus very 
little shorter than outer. Telson about twice as long as broad, regularly tapering, 
with 6 or 7 pairs of dorsal and marginal and 1 of apical spinules, cleft extending 
beyond the middle, at. no part dehiscent. Colour uniformly whitish. L.9 12 mm. 

Trondhjemsfjord, depth at about 188 m; Stavangerfjord, depth 753 m. 


4. O. zschauii (Pfeff.) 1888 Anonys z., Pfeffer in: Jahrb. Hamburg. Anst., 
v.5 p.87 t.2 f.1 | 1893 A.z., A. Della Valle in: F. Fl. Neapel, v.20 p.823 | 1888 
Orchomene cavimanus, T. Stebbing in: Rep. Voy. Challenger, 0.29 p.679 t.22 | 1891 
O. excavatus (err., pro: cavimanus) + Anonyx zschawii, G.O. Sars, Urust. Norway, v.1 
p. 74, 88. 

Side-plate 5 not deeper behind than in front. Pleon segment 3, postero- 
lateral angles rounded, 4!" forming behind the dorsal depression a carinate point 
lifted above the 5th segment. . Eyes large, wider below than above. Antenna l, 
flagellum with 13—20 joints, accessory flagellum with 5—7 joints. Antenna 2, 
ultimate joint of pedunele shorter than penultimate, equal to antepenultimate, 
flagellum with 15—18 joints. Epistome appears to be somewhat projeeting. 
Maxilla 1 with inner plate elongate, and having (Pfeffer) about 14 spine-teeth 
on apex of palp. Maxilla 2, inner plate very little shorter than outer. 
Maxillipeds, inner plates not apically excavate, outer plates scarcely reaching 
end of 24 joint of palp. Gnathopod 1 nearly as in O. musculosa. Gnathopod 2, 
5th joint wide, 6! joint with the little palm excavate, leaving a cavity when 
the small finger is elosed upon it. Uropod 3, inner ramus considerably 
shorter than outer. Telson twice as long as broad, with 2 pairs of marginal 
and 1 pair of apical spinules, cleft extending for */, of the length, dehiscent. 
L. 10—15°5 mm. 

South-Atlantie (South Georgia); southern Indian Ocean (Kerguelen Island, 
depth 228 m). 


Lysianassidarum genera dubia et species dubiae. 


Alibrotus M.-E. 1830 Lysianassa (part.), H. Milne Edwards in: Ann. Sci. nat., 
v.20 p.364 | 1840 Alibrotus (Sp. un.: A. chauseicus), H. Milne Edwards, Hist. nat. Crust., 
v.3 p.23 | 1846 Halibrotus (nom. emend.), L. Agassiz, Nomenel. zool., Index p.14, 171. 


Anonyx albus Gosse 1850 A. a. (nom. nud.), A. White in: List Brit. An. 
Brit. Mus., v.4 p.50 | 1855 A. a., Gosse, Mau. mar. Zool., v.1 p.139 f.261; p. 142 | 
1857 A. a., A. White,- Hist. Brit. Crust., p. 169. 

North-Atlantic (Great Britain). B 

A. amaurus Giles 1888 A. a. G. M. Giles in: J. Asiat. Soc. Bengal, v. 57 
p. 220 1.6 £.1. 


Blind. Side-plates subequal in depth. Gnathopod 1 strongly subehelate. All 
limbs short. Colour ivory white. L. 12 mm. 


Bay of Bengal (Burmah). Depth 2478 m, in water-logged seeds. 


86 Lysianassidarum genera dubia et species dubiae 


A. annulatus Bate 1862 A.a., (Stimpson in MS.) Bate, Cat. Amphip. Brit. 
Mus., p.79 t.13 £.3. 


Perhaps belonging to Tryphosa (p.68). L. 6 mm. 
North-Pacifie (Japan). 


A. brocchii Catta 1875 A.b., Catta in: Rev. Sei. nat., v.4 p.164. 
Mediterranean (Marseilles). Depth 25—30 m. 


A.elegans W. Thomps. 1847 A.e.. W. Thompson in: Ann. nat. Hist., v.20 p. 243. 
Perhaps identifical with Orchomene batei (p.45). L. 12 ınm. 
North-Atlantie (Ireland). 
A. exiguus Stimps. 1853 A. e., Stimpson in: Smithson. Contr., v.6 nr.5 p.51| 
1862 A. e., Bate, Cat. Amphip. Brit. Mus., p. 75 t.12 £.3. 
“ Fundy Bay (Grand Manan). Depth 14—27 m. 
A.femoratus Pfefl. 1888 A. f., Pfeffer in: Jahrb. Hamburg. Anst., v.5 p. 93 
1.2 f.2. 
Possibly belonging to Onisimus (p.25).” L. about 12 mm. 
South-Atlantie (South Georgia). 
A. filiger Stimps. 1864 A. f., Stimpson in: P. Ace. Philad., p. 157 | 1888 A. f., 
T. Stebbing in: Rep. Voy. Challenger, 0.29 p. 351. 
To Hippomedon (p. 58)?, or Lepidepeereum (p. 78)? L. 8 mm. 
Puget Sound. 
A.indicus Giles 1890 A.i., G.M. Giles in: J. Asiat. Soc. Bengal, v.59 p. 69 
t.2 £.5, 5a. 


If the palp of mandible is really only 2-jointed, the species requires a new 
genus. L. about 5 mm. 


Bay of Bengal (Seven Pagodas near Madras). Depth 9—18 m. 
A. nardonis Heller 1866 A.n., Cam. Heller in: Denk. Ak. Wien, v.2611 p. 26 


t.2f.17,18 | 1876 A.n., Tryphosa (part.)?, A. Boeck, Skand. Arkt. Amphip., v.2 p. 180] 
1893 A.n., Ichnopus (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 836. 


Exeluded from Anonyx and Tryphosa by the gnathopod 1, from Ichnopus by 
the antennae; perhaps a Socarnes (p.56). L. 4—5 mm. 


Adriatie. 
A.nobilis Stimps. 1853 A.n., Stimpson in: Smithson. Contr., v.6 nr. 5 p.50| 
1862 A.n., Bate, Cat. Amphip. Brit. Mus., p. 76 t.12 £.5. 

Fundy Bay (Grand Manan). Low water mark. 

A. pallidus Stimps. 1853 A.p., Stimpson in: Smithson. Contr., ©.6 nr. 5 p. 50| 
1862 A.p., Bate, Cat. Amphip. Brit. Mus., p. 81. 

Fundy Bay (Grand Manan). Depth 7—36 m. 

A. politus Stimps. 1853 A.»p., Stimpson in: Smithson. Contr., v6 nr.5 p.50| 
1862 A.p., Bate, Cat. Amphip. Brit. Mus., p. 80. 

Fundy Bay (Grand Manan). Depth 72 m. 

A. punctatus Bate 1862 A.p., (Stimpson in MS.) Bate, Cat. Amphip. Brit. 
Mus., p.78 t.13 f.2. 

L. 13 mm. 

Behring Strait. 


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Lysianassidarum genera dubia et species dubiae 87 


 A.schmardae Heller 1866 A. s., Ichnopus s. + A. filicornis (8), Cam. Heller 
in: Denk. Ak. Wien, v. 2611 p.21 t.2 f.29--33; p.23 t.3 f. 13—16 | ?1893 I. s., A. Della 
Valle in: F. Fl. Neapel, v.20 p.808 t.5 £.4; t.27 f.23—-32. 


Della Valle’s species differs from that of Heller in gnathopod 1, uropod 3 and 
telson, and is excluded from Ichnopus by the branchial vesicles with accessory lobes on 
one side only, by uropod 3 with 1-jointed outer ramus and the large 1st joint of 
flagellam in antenna 1. 


Adriatie, Gulf of Naples. 
. A.sp., Bate 1862 A. plautus (err., non Kroyer 1845!), Bate, Cat. Amphip. 

Brit. Mus., p.78 t.13 £.1. 

. Approaching to Nannonyx spinimanus (p. 35). L. 5 mm. 

North-Sea (Seotland). 

A.sp., Della Valle 1893 A. nanus (err., non Kroyer 1846!), A. Della Valle 
in: F. Fl. Neapel, v.20 p.820 t.28 f. 36—42. 

Mediterranean. 

A.sp., G.M. Thoms. 1832 A, exiguus (err., non Stimpson 1853!), G. M. Thomson 
in: Tr. N. Zealand Inst., v.14 p. 232 t.118 f.2. 

Paterson Inlet [Stewart Island near New Zealand]. Depth 14 m. 

Lysianassa affinis Hasw. 1880 L.a., Haswell in: P. Linn. Soc. N.S. Wales, 
v.4 p.255 | 1885 L. a., Haswell in: P. Linn. Soe. N.S. Wales, v.10 p.99 t.12 £.5, 6. 

Perhaps 5 of Lysianassa nitens (p. 88). 

"Port Jackson [East-Australia]. 

L. australiensis Hasw. 1880 L. a., Haswell in: P. Linn. Soc. N.S. Wales, 


v.4 p.323 t.18 f.3 | 1885 L. a, Haswell in: P. Linn. Soc. N.S. Wales, v. 10 p.99 
1.12 £.3, 4. 


Port Jackson [East-Australia]. 
L. brasiliensis Dana 1852 L.b., J. D. Dana in: P. Amer. Ac., v.2 p.208 | 
1853 &55 L.? b., J. D. Dana in: U. S. expl. Exp.. v. 1311 p. 914; t. 62 f. 1a—f. 
Tropical Atlantie (Rio Janeiro). 
L. chauseica M.-E. 1830 L.c., H. Milne Edwards in: Ann, Sei. nat., v. 20 
p- 865 | 1840 Alibrotus chauseicus, H. Milne Edwards, Hist. nat. Crust., v.3 p. 23. 
Golfe de St. Malo (Iles Chausay). 
L.cymba Goes 1866 L.?c., Goes in: Öfv. Ak. Förh., 0.22 p.521 t.38 £.7| 


1872 L. c., A. Boeck, Skand. Arkt. Amphip., «.1 p.118 ! 1893 L.c., A. Della Valle in: 
F. Fl. Neapel, v.20 p. 849. 


Aretie Ocean (Spitzbergen). Depth 9 m. 


L.fisheri Lockington 1877 L. f., Lockington in: P. Calif. Ae., v.7 p.48. 

Behring Sea (Alaska). 

L. marina Bate 1857 L. m., Bate in: Ann. nat. Hist., ser.2 v.19 p.138 | 1862 
L. atlantica (part.), Bate, Cat. Ampkip. Brit. Mus., p. 68 t.10 £.10. 

Plymouth Sound; North-Sea (Banff). 

L. martensi Goes 1866 L.m., Gö&s in: Öfv. Ak. Förh., 0.22 p.519 t.37 f.2| 
1871 Anonyx m., A. Boeck in: Forh. Selsk. Christian., 1870 p. 109 | 1872 A. m., A. Boeck, 


Skand. Arkt. Amphip., ®.1 p.156 | 1893 A. m., A. Della Valle in: F. Fl. Neapel, 
v.20 p. 836. 


Nearer to Anonyx lilljeborgii (p. 55) than to A. nugax (p.54). L. 75 mm. 
Arectie Ocean (Spitzbergen). Depth 38 m. 


’ 


> 


88 Lysianassidarum genera dubia et species dubiae, Stegocephalidae 


L. nitens Hasw. 1880 L.n., Haswell in: P. Linn. Soc. N.S. Wales, v.4 p. 255 
t.8 £.5/1885 Anonyx n., Haswell in: P. Linn. Soc. N.S. Wales, v.10 p.98 t. 12 £.1, 2| 
1893 A.n., A. Della Valle in: F. Fl. Neapel, v.20 p. 886. 


L. 6 mm. 
Port Jackson [East-Australia]. 


Se Sa ee 


L. woodmasoni Giles 1890 L. w., G. M. Giles in: J. Asiat. Soc. Bengal, v.59 
P.68 1.2 £.4. 


Agreeing in several points with Podoprion bolivari (p.18). L. 8 mm. 
Macpherson’s Strait (Andaman Islands). Coral sand, depth 30 m. 


Orchomene grimaldii Chevreux 1890 O©. g., Chevreux in: Bull. Soc. zool. 
France, v. 15 p. 164. 


Separated from ÖOrchomene by the entire telson, from Nannonyx by the sub- 
chelate gnathopod 1, from Onisimus by having the rami of uropod 3 shorter than 
the peduncle. Mouth-organs not described. 


Mediterranean (Monaco). Depth 475 m. Be 


Stenia Dana 1849 $S. (non Guen&e 1846, Lepidoptera, fide: A. Marschall, 
Nomenel. zool., p.813), J. D. Dana in: Amer. J. Sei., ser.2 0.8 p.136 ! 1852 $. (Sp. 
un.: $. magellanica), .). D. Dana in: P. Amer. Ac., v.2 p. 209. 


S. magellanica Dana 1852 S. m., J. D. Dana in: P. Amer. Ac., v.2 p.209 | 
1888 Anonys magellanicus, T. Stebbing in: Rep. Voy. Challenger, 0.29 p.266 | 1853 
& 55 A. fuegiensis, J.D. Dana in: U. S. expl. Exp., v. 1311 p. 919; t.62 f.4a—p | 1893 
A.f.. A. Della Valle in: F. Fl. Neapel, «.20 p. 836. 


Epistome and telson agree with Onisimus (p. 25), but head and mouth-organs 
in general and gnathopod 1 with Tryphosa (p. 68). 


Good Success Bay [Tierra del Fuego]. 


2. Fam. Stegocephalidae 


1852 Subfam. Stegocephalinae, J. D. Dana in: Amer. J. Sei., ser.2 v.14 p.310 | 
1853 Subfam. 8.; J. D. Dand in: U.S. expl. Exp., v. 1311 p. 907 | 1882 Stegocephalidae, 
G.O. Sars in: Forh. Selsk. Christian., nr. 18 p.23 | 1886 Subfam. Lysianassina (part.), 
Gerstaecker in: Bronn’s Kl. Ordn., v.511 p.499 | 1888 Stegocephalidae, T. Stebbing in: 
Rep. Voy. Challenger, v.29 p.727 | 1891 S., G..O. Sars, Crust. Norway, v.1 p.196 | 1893 
Gammaridi (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 620. 


Head short, retiring. Peraeon broad, deflexed in front. Side-plate 4 
large (Fig. 18). _Antenna 1, accessory flagellum 1- or 2-joınted (Fig. 19). 
Antenna 2 seldom much longer than antenna 1. Upper lip bilobed. Lower 
lip without inner lobes, Mandible (Fig. 17, 21) without molar or palp, 
accessory plate on one of the pair. Maxilla 1 (Fig. 15, 20), inner plate with 
numerous setae, outer usually with 9 prineipal spines. Maxilla 2 (Fig. 16), 
inner plate very broad and setose, outer narrow. Maxillipeds, plates broad rather 
than long, last 2 joints of palp narrow. Gmathopods 1 and 2 not subchelate. 
Peraeopod 3, 24 joint not expanded. Uropod 3 biramous. Telson small. 


Marine. 


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9 genera, 12 accepted species, 2 obseure. 


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StegocephaJidae, Phippsia 2 | 89 


Synopsis of the genera: 

Mandible (Fig. 17, 21) dentieulate — 2. 

{ Mandible not dentieulate — 6. 

j Telson cleft — 3. 

\ Telson not eleft — 5. 
Maxilla 1 (Fig. 15), palp 2-jointed . . . . 1. Gen. Phippsia. .... . p- 89 
Maxilla 1, palp 1-jointed — 4. 
Peraeopod 4, 24 joint expanded. . . . . 


o 


2. Gen. Stegocephalus . . . p.90 
Peraeopod 4, 2d joint not expanded. . . 3. Gen. Stegocephaloides, . p.91 
4 
b) 


> 


Maxillipeds, inner plates of normal size . 4. Gen. Andaniopsis. . . . p.92 
| Maxillipeds, inner plates very short . . . 5. Gen. Andaniella . .. .p.9% 
Telson not cleft — 7. 
| Telson celeft — 8. 
Maxilla 1, palp 2-jointed . .. ..... 6. Gen. Andaniexis . . . . p.% 
N Maxilla 1 (Fig.20), palp 1-jointed . . . . 7. Gen. Parandania .. . . p.% 
Pleon segment 6 very elongate .... . 8. Gen. Andaniotes . . . . P-% 
| Pleon segment 6 not very elongate . . . 9. Gen. Euandania. ... . p- 97 


{er} 


1 


8 


1. Gen. Phippsia Stebb.*) 


1793 Subgen. Gammarellus (part.), J. F.W. Herbst. Naturg. Krabben Krebse, 
v.2 p.106 | 1891 Aspidopleurus (non F.J. Pietet & A. Humbert 1866, Pisces!), G. O. Sars,. 
Crust. Norway, v.1 p.203 | 1893 A., A. Della Valle in: F. Fl. Neapel, v.20 p. 632. 


Side-plate 4 immensely expanded, overlapping side-plates 5 and 6. 
Eyes wanting. Epistome projecting as rounded compressed lobe. Upper lip 
slightly and centrally notched. 
Lower lip, lobes narrow, not 


Fr strongly dehiscent. Mandible, 

2 outer eutting edge narrow, finely 

pinte }_ plate dentate. Maxilla 1 (Fig. 15), 

inner plate setose on inner 

margin ofnarrowed distalhalf, 

FR palp very small, but 2-jointed. 

P. gibbose. Maxilla 2 (Fig.16), inner plate 
Maxilla ı. long, distally rather widened, Fig. ı6. P. gibbosa. 

oe outer plate wide apart, linear, en 


tipped withlonghooked spines. 
Maxillipeds, inner plates narrow, obliquely truncate, outer reaching beyond. 
acutely produced 24 joint of palp. Gnathopod 1 rather stouter than gnatho- 
pod 2. Peraeopod 4, 24 joint linear. Peraeopod 5, 24 joint expanded. Uropod 3, 
rami lanceolate, unarmed. Telson oval, more or less cleft. 


2 species. 

Synopsis of species: - 
Hs wich amnte sim... 2. ee 1. P. ampulla. . . p.89 
Head without distinet rostrum . .. .».. 2 2 2 2.2.2. 2. P. gibbosa . . . p.90 


1. P, ampulla (Phipps) 1774 Cancer a., Phipps, Voy. North Pole, p.191* t.12 
f.3 | 1781 Gammarus a., J. C. Fabrieius, Spee. Ins., v.1 p.515 | 1793 Cancer (Gamma- 
rellus) a., J. F.W. Herbst, Naturg. Krabben Krebse, v.,2 p. 116 t.35 f.1 | 1840 Lysia- 
nassa? a., H. Milne Edwards, Hist. nat. Crust., 0.3 p.22|1866 Stegocephalus a. (part.), Go&s- 


*) Nom. nov. After Constantine John Phipps. — The name Aspidopleurus is 
preoccupied (1866, F. J. Pietet & A. Humbert, Poiss. foss. Liban, p. 107). 


Ai tr; 


90 : Phippsia, Stegocephalus 


‚in: Öfv. Ak. Förh., 2.22 p.521 t.38 f.9 (not f.8) | 1893 Aspidopleurus a., A. Della Valle 
in: F. Fl. Neapel, v. 20 p. 633 t. 59 f.45 | 1880 Stegocephalus kessleri (nom. nud.), 
Stuxberg in: Bih. Svenska Ak., v.5 nr.22 p.65, 72 | 1882 S. k., Stuxberg in: Vega-Exp., 
v.1 p.713 £. | 1891 $.k., Aspidopleurus (part.)?. G.O. Sars, Crust. Norway, v.1 p. 204. 
Head with conical acute down-bent rostrum. Side-plate 4 with the 
great backward expansion moderately deep. Pleon segment 3 not dorsally 
produced, postero-lateral corners much ceurved upward to a subacute point. 
Mouth-organs undescribed. Peraeopod 4, the narrow 24 joint with lower hind 
corner ending in a little rounded lobe (Goös). Telson oval, a little longer 
than broad, cleft dehiscent, not quite reaching the middle. Colour almost 
white (J. ©. Fabrieius). — L. attaining 565 mm. 


Arctie Ocean. 


2. P. gibbosa (0. Sars) 1882 Stegocephalus gibbosus, G.O.Sars in: Forh. Selsk. 
Christian., nr. 18 p.85 t.3 £.7 | 1891 Aspidopleurus g., G. O. Sars, Crust. Norway, v.1 
p-204 t.71 f.1) 1893 A. g., A. Della Valle in: F. Fl. Neapel, v.20 p. 634 t.59 f.46, 47. 

Head without rostrum. Side-plate 4 with lower margin horizontal, 
backward expansion very deep, rounded behind. Pleon segment 3 produced 
at the end dorsally to a gibbous projection, pointed at the tip, postero- 
lateral corners quadrate below, acutely upturned above. Antenna 1, 1° joint 
of peduncle scarcely longer than 24 and 34 combined, flagellum with 6 joints, 
1° not very elongate, accessory flagellum small. Antenna 2 subequal to 
antenna 1, ultimate joint of pedunele rather longer than penultimate. Gnatho- 
pods 1 and 2, 6" joint narrow, tapering, scarcely longer than 5t". Peraeopod 4, 
24 joint withlower hind angle rounded, not produced. Peraeopod 5, 24 joint 
oblong, slightly widened distally, rounded end overlapping 34 joint. Telson 
a little longer than broad, celeft dehiscent, not nearly reaching the middle. 
Colour uniformly milk white. L. © 8 mm. 


North-Atlantie(West-Norway). Among living Lophelia prolifera (Pall.). Depth226m. . 


2. Gen. Stegocephalus Kroyer 


1842 Stegocephalus (Sp. un.: 8. inflatus), Kroyer in: Naturh. Tidsskr., v.4 p.150 | 

1891 8., G.O.Sars, Crust. Norway, v.1 p.197 | 1893 $. (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 626. 

Head more or less rostrate. Side-plate 4 deep, completely overlapping 

the 5t", Jower margin evenly curved. Eyes wanting. Antenna 1 with bundles 

of sensory setae on flagellum, accessory flagellum with 24 joint 

. minute. Epistome flattened in front. Upper lip deeply and 

unsymmetrically bilobed. Lower lip, lobes dehiscent with in- 

kann. curved apical tooth. Mandible (Fig. 17), eutting edge coarsely 

dentate, accessory plate of left mandible finely serrate. Maxilla 1, 

inner plate fringed with setae all along oblique upper margin, 

Ng outer carrying about a score of spines, palp 1-jointed, tipped 

with a few spines. Maxilla 2, inner plate broad, with numerous 


d spines, outer linear, standing apart, tipped with short hooked 
Fig. 17. spines. Maxillipeds, plates apically rounded, outer large, broad, 


a 


S. inflatus. sliohtly serfate on inner margin, not reaching beyond 24joint: 


De ine N 2of palp. Gnathopod 1 rather stouter than gnathopod 2, 6% joint 


narrow in both, tapering only in gnathopod 2. Peraeopods 4 
and 5, 24 joint expanded. Uropod 3, rami lanceolate, minutely dentieulate, 
Telson triangular, cleft, unarmed. 

2 species. 


zu KB a a run nn 


seinen & Far. 2 


I 
3 


Norway, v.1. p.201 | 1893 8. (part.), A. Della 


. Stegocephalus, Stegocephaloides 9] 

Synopsis of species: 
Pleon segment 3, lower margin serrate, hinder smooth. . . . 1. S.inflatus. . p.91 
Pleon segment 3, lower margin smooth, hinder serrate. . . . 2. 8.similis.. . p.91 


1. S.inflatus Kroyer 1842 S.i., Kroyer in: Naturh. Tidsskr., v.4 p.150 | 1845 


 $.i., Kroyer in: Naturh. Tidsskr., ser.2 v.1 p.522 t.7 f£.3 | 1887 S.i., H.J. Hansen in: 


Dijmphna Udb., p.218 t.21 £.10—10e | 1888 S.;., T. Stebbing in: Rep. Voy. Challenger, 
©.29 p. 728, 1721 t.187a | 1891 S.:., G. O. Sars, Crust. Norway, v.1 p.198 t.69 | 1893 
S.i., A. Della Valle in: F. Fl. Neapel, v.20 p. 627 t.59 f. 32—34 | 1855 S. ampulla (err., 
non Cancer a. Phipps 1774)), T. Bell in: Belcher, Last aret. Voy., v.2 p.406 t.35 f.1| 
1866 S..a. (part.), Goes in: Ofv. Ak. Förh., v.22 p.521 t.38 f.8 (not £. 9). 

Head with deflexed rostrum reaching end of 1° joint of antenna 1, lateral 
corners rounded, somewhat projeeting. Peraeon segment 1 not so long as 
24 and 39 combined. Side-plate 4 twice as deep as segment, as broad as 
side-plates 1—3 combined. Pleon segment 3, lower margin serrate, hinder 
smooth, angles acute. Antenna 1, 1° joint nearly twice as long as 24 and 34 
combined, with slight setulose expansion; flagellum with 12-joints, 1! not elongate, 
shorter than accessory flagellum. Antenna 2 rather longer than antenna 1, 
ultimate joint of pedunele longer than penultimate, flagellum slender, subequal 
to pedunele. Gnathopod 1, 6" joint as long as the slightly dilated dth, 
Gnathopod 2, 6 joint sublinear, longer than 5%. Peraeopod 4, 24 joint 
oblong quadrangular, lower hind corner quadrate. Peraeopod 5, 24 joint 
much expanded, hind margin very convex, serrulate, lower corner acute. 
Uropod 3, rami nearly twice as long as peduncle. Telson nearly twice as long as 
broad, ending acutely, eleft beyond centre. Colour yeilowish with brown patches, 
legs and antennae banded. L., fully extended, 47 mm in rare instances. 

Arctie Ocean; North-Atlantice (West-Norway, Shetland Isles, Nova Scotia). 
Depth 188—376 m. 

2. S.similis O.Sars 1891 8.s., G. O.Sars, Crust. Norway, v.1l p.200 1.70 £.1| 
1893 S. s., A. Della Valle in: F. Fl. Neapel, 0.20 p. 627 t.50 f. 35. N 

Head with very short obtuse rostrum, lateral corners rounded, very 
slightly projecting. Peraeon segment 1 longer than 24 and 34 combined. 
Side-plate 4 not nearly twice as deep as segment, nor as broad as side-plates 1—3 
combined. Pleon segment 3, lower margin smooth, hinder serrate, angle 
not produced. Antenna 1 as in S. inflatus, but flagellum with 9 joints, 1° longer 
than accessory flagellum. Antenna 2 scarcely longer than antenna 1, ultimate 
and penultimate joints of peduncle subequal, flagellum shorter than pedunele. 
Gnathopod 1, 5tk joint much dilated, shorter than 6!", Peraeopods 4 and 5, 
24 joint oval, longer in 5% pair than in 4. Uropod 3 as in S. inflatus. 
Telson not nearly twice as long as broad, ending subacutely, cleft beyond 
centre. Straw-coloured, mottled with brown and reddish spots. L. © 12 mm. 

Arctie Ocean and North-Atlantie (West- 1 
Norway). Often but not always with S. inflatus. 


3. Gen. Stegocephaloides 0. Sars 
1891 Stegocephaloides, G. O. Sars, Crust. 


Valle in: F. Fl. Neapel, v.20 p. 629. 


Like Stegocephalus (p. 90) in mouth- 
organs and general appearance (Fig. 18), 
but side-plate 4 with lower and hinder 


ge r h -th ; Fig. 18. 8. christianiensis, 2. 
margins meeting in an angle; 6'% smaller Yrmltlaw. tAfter 6: 0 Sars | 


92 > Stegocephaloides, Andaniopsis 


-than 7th, greatly narrowed below. Antenna 1, peduncle rather flattened, flagellum 
with 4 joints, 1° very large, last spiniform. Gmathopods 1 and 2 subequal 
and similar, 6!" joint oblong, tapering distally, rather longer than 5, finger 
very short. Peraeopod 4, 24 joint linear; peraeopod 5, 24 joint large, 


produced downward in an acute lobe. Uropod 3, rami unarmed. Telson cleft, - 


2 species. 
Synopsis of species: 
Peraeopod 5, apex of 2d joint not very acute nor 


produest. Below WR: u. SET 1. 8. christianiensis. . . p.92 
Peraeopod 5, apex of 24 joint very aeute, produced 
uno Velo A, a ee 2: B,.A0XaDE 2 2 2.54 p. 92 


1. S. christianiensis (Boeck) 1871 Stegocephalus c.. A. Boeck in: Forh. Selsk. 
Christian., 1870 p.128 | 1876 8. c., A. Boeck, Skand. Arkt. Amphip., ©.2 p.424 t.8 f.4; 
t.9 £.1 | 1891 Stegocephaloides 6, @. O. Sars, Crust. Norway, v.1 p.202 t.70 f.2 1893 
S. c., A. Della Valle in: F. Fl. Neapel, v.20 p.681 t.59 £.4l. 


Head with very short rostrum, lateral angles acute (Fig. 18). Side- 
plate 4 nearly as broad as deep. Pleon segment 3, postero-lateral angles 
produced, minutely bidentate. Antenna 1, accessory flagellum scarce half as 
long as laminar 1° joint of flagellum. Antenna 2, ultimate and penultimate joints 
of peduncle subequal, flagellum short, 8- or 9-jointed. Peraeopod 5, 24 joint 
as long as rest of limb, overlapping 4" joint, hind margin serrate, angularly 


curved, obtusely pointed below. Telson oblong oval, moderately tapering, 


eleft nearly to the middle. Colour tessellated with angular patches of pigment 
spots, dark greenish brown. L. © normally 7 mm; North-Atlantie specimens 
more than twice this size, perhaps therefore a different species (Sars). 


Aretie Ocean, North-Atlantic, North-Sea and Skagerrak (Bohuslän, South- and 
West-Norway). Depth 38—188 m. 


2.8. auratus (0. Sars) 1882 Stegocephalus a., G. O. Sars in: Forh. Selsk. 
Christian., nr.18 p.86 t.3 f.8 | 1891 Stegocephaloides a., G. O. Sars, Crust. Norway, 
v.1 p.203 t.70 £.3 | 1893 S.a., A. Della Valle in: F. Fl. Neapel, v.20 p.631 t.59 f.42. 


Head with minute rostrum, lateral angles narrowly rounded.. ‚Side-plate 4 
much deeper than broad. Pleon segment 3, postero-lateral angles produced, 
minutely serrate. Antenna 1, accessory flagellum more than half as long as 
1° joint of peduncle. - Peraeopod 5 short, 24 joint much longer than rest 
of limb, overlapping 5t" joint, hind margin serrate, smoothly curved, acutely 
pointed below. Telson subtriangular, sharply tapering, cleft beyond the middle. 
Colour semipellueid, with broad orange band round the middle. L. © 5 mm. 


Arctic Ocean, North-Atlantie and North-Sea (North- and West-Norway). Solitary, 
in depths of 150—876 m. 


4. Gen. Andaniopsis 0. Sars 


1871 Andania (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.128 | 1891 
Andaniopsis (Sp. un.: A. nordlandica), G. O. Sars, Crust. Norway, ®.1 p. 208. 


Side-plate 4 broad, completely overlapping side-plate 5. Eyes distinct, 
small. Antennae 1 and 2 subequal; antenna 1, flagellum 4-jointed. Epistome 
rounded in front. Upper lip unsymmetrically bilobed. Mandible, eutting 
edge straight, finely denticulate Maxilla 1, inner plate with many setae, 
outer rather narrow, palp small, 1-jointed. Maxilla 2, inner plate short, 
broad, with many setae or spines, outer short, sublinear, tipped with spines. 


HE u rien a Tr ae un 5, 


4 
U 
73 
- 
2 


es TEE ET ER DER Fate TE Sen Era air 1 EEE Zr Rn Zee a 
NT EN nn ee Y - 


Andaniopsis, Andaniella 93 


Maxillipeds, inner plates transversely truncate, reaching end of palp’s 1° joint, 
‚outer rather large, finely spinulose inside, palp very slender. Gnathopods 1 and 2 
similar, 6!" joint narrow, tapering, rather longer than 5t", finger slight, smooth. 
Peraeopod 4, 24 joint a little dilated below. Peraeopod 5 much shorter 
than preceding pairs, 24 joint greatly expanded, decurrent lobe obtusely pointed, 
4t!h joint expanded, decurrent. Uropod 3, rami narrow, unarmed, outer 
2-jointed. Telson very small, triangular, entire. 


l species. 


1. A. nordlandiea (Boeek) 1871 Andanian., A. Boeck in: Forh. Selsk. Christian., 
1870 p.129 | 1876 A.n., A. Boeck, Skand. Arkt. Amphip., 2 p.428 t.9 f.3 | 1891 
Andaniopsis n., G. O. Sars, Crust. Norway. v.1 p.209 t.72 f.2 | 1895 Stegocephaloides 
nordlandicus, A. Della Valle in: F. Fl. Neapel, v.20 p. 630 t.59 f.40. 


Head not rostrate, lateral corners quadrate. Peraeon segment 1 scarcely 
as long as 24 and 34 combined. Side-plate 4 nearly as broad as deep. 
Pleon segment '3, postero-lateral angles quadrate. Eyes narrow, oblong, 
white, tinged with red below. Antenna 1, 1° joint of flagellum very 
large, accessory flagellum scarcely more than half its length. Antenna 2, ultimate 
joint of peduncle shorter than penultimate; flagellum as long as peduncle. 
Uropod 3, rami longer than peduncle, 24 joint of outer ramus subequal to 1°t, 
Telson rather broader than long, apex obtusely pointed. Colour yellowish, 
transversely banded with mottling of dark brown and reddish spots. L.Q5 mm. 


Aretie Ocean, North-Atlantie and North-Sea (West-Norway). Depth 38—188 m. 


5. Gen. Andaniella 0. Sars 


1891 Andaniella (Sp. un.: A. pectinata), G. ©. Sars, Crust. Norway, v.1 p. 210. 


Side-plate 4 broad, completely overlapping 5t%. Eyes wanting. Antenna 1 
longer than antenna 2, flagellum 4-jointed. Epistome produced in front to 
an acuminate lappet. Upper lip rather wide, unsymmetrically bilobed. Lower 
lip with the lobes rather narrow (with a bidentate process, Aurivillius), apically 
rounded. Mandible strong, eutting edge not straight, coarsely dentate. Maxillal, 
inner plate rather small, with several setae, outer large, with 9 strong spines, 
palp very small, 1-jointed (with an obseure suture near the base, Aurivillius). 
Maxilla 2, inner plate short, broad, outer not extremely narrow, with 4 strong 
apical spines. Maxillipeds, inner plates very short, only reaching base of 
palp, outer large, reaching much beyond 24 joint of slender, slightly armed 
palp. Gnathopod 1 shorter than gnathopod 2, 6% joint longer than 5th, 
finger strong, curved, armed with -spines. Peraeopod 4, 24 joint linear. 
Peraeopod 5 much shorter than preceding pairs, 24 joint oval, deeurrent 
part rounded, 4% joint not much expanded or deeurrent. Uropod 3, rami 
shorter than peduncle, outer 2-jointed, longer than inner. Telson small, 
triangular, entire. 


1. species. 


1. A. pectinata (O.Sars) 1882 Andaniap., G. ©. Sars in: Forh. Selsk. Christian., 
nr.18 p.86 t.3 f.9a,b | 1885 A.p., ©.W.S. Aurivillius in: Vega-Exp., v.4 p. 226 t.7 
f. 1—12 | 1888 Stegocephalus pectinatus, T. Stebbing in: Rep. Voy. Challenger, v.29 
p-557 | 1891 Andaniella pectinata, G.O.Sars, Crust. Norway, v.1 p.211 t.72 f.3 | 18% 
Stegocephaloides pectinatus, A. Della Valle in: F. Fl. Neapel, v,20 p. 630 t.59 f 39. 


Body eapable of rolling up into a ball. Head not rostrate, lateral 
corners quadrate. Peraeon segment 1 little longer than 24. Pleon segment 3, 


94 Andaniella, Andaniexis 


postero-lateral corners slightly rounded. Antenna 1, pedunele compressed, 
flagellum, 1° joint longer than other 3 combined, twice as long as accessory 
flagellum. Antenna 2, ultimate joint of pedunele much shorter than the stout 
penultimate, flagellum very short. Gmnathopod 1, 6% joint slightly dilated 
in the middle, finger with 4 spines, Gnathopod 2, 6!" joint sublinear, finger 
with 2 spines. Peraeopod 5, 24 joint oval, scarcely longer than rest of limb, 
hind margin smooth reaching middle of slightly decurrent 4tk joint. Telson 
much broader than long. Colour yellowish, mottled with light brown spots. 
L. 9 4 mm. 

Aretie Ocean and North-Atlantie (Norway, Greenland, Spitzbergen). Sometimes 
in branchial cavity of Ascidians. 


6. Gen. Andaniexis Stebb.”*) 


1871 Andania (non F. Walker 1860, Lepidoptera!) (part.), A. Boeck in: Forh. 
Selsk. Christian., 1870 p.128 | 1876 A., A. Boeck, Skand. Arkt. Amphip., v.2 p.426 | 
1888 A. (part.), T. Stebbing in: Rep. Voy. Challenger, v.29 p.30 | 1891 A., G. ©. Sars, 
Crust. Norway, v.1 p.206 | 1893 A., A. Della Valle in: F. Fl. Neapel, v.20 p. 682. 

Side-plate 4 not completely overlapping 5t". Eyes distinet, but without 
any trace of visual elements. Antennae 1 and 2 subequal; flagellum of antenna 1 
slender, 5-jointed, accessory flagellum as long as 1° joint of primary. Epistome 
rounded in front. Upper lip small, slightly emarginate. Lower lip, lobes 
dehiscent, narrowly rounded with small dentiform process. Mandible broad, 
eutting edge straight, simple. Maxilla 1, inner plate broad, densely setose, 
outer with strong dentieulate spines, palp well developed, 2-jointed. Maxilla 2, 
inner plate short, broad, with many plumose setae, outer short, narrow, with 
simple setiform spines. Maxillipeds, inner plates reaching little beyond base 
of palp, obliquely.truncate, outer short, rounded, with curved spinules on 
inner margin, palp robust, rapidly tapering. Gmnathopod 1 rather robust, 
6th joint oblong oval, longer than 5tt, Gnathopod 2, 6t% joint linear, much 
longer than 5tı, Peraeopod 4, 24 joint moderately expanded, oblong oval, 
6th joint long. Peraeopod 5, 24 joint much expanded, partly overlapping 
the rather small 4 joint. Uropod 3, rami narrow, unarmed, shorter than 
peduncle, 24 joint of outer ramus much shorter than 1°. Telson small, 
triangular, as long as .broad, entire. 

l accepted species, 1 incompletely known. 


1. A. abyssi (Boeck) 1871 Andania a., A. Boeck in: Forh. Selsk. Christian., 
1870 p.129.| 1876 4A.a., A. Boeck, Skand. Arkt. Amphip., 2 p.426 t.9 f.2 | 1891 
A.a., G. O. Sars, Crust. "Norway, v.1 p.207 1.71 £.2; 1.72 £.1 | 1898 A.a., A. Della 
Valle in: F. Fl. Neapel, v.20 p.632 t.59 f. 43—44. 


Head not rostrate, lateral angles rounded, projecting. Peraeon segment 1 
nearly as long as 24 and 39 combined. Side-plate 4 obliquely quadrangular, 
deeper than broad. Pleon segment 3 smooth, postero-lateral angles produced, 


not acute. Eyes conspicuous, subquadrate, milky-white. Antenna 1, 1% joint 


large, somewhat flattened; flagellum, 1° joint rather long, 5t% spiniform. 
Antenna 2, ultimate joint of pedunele much longer than penultimate, flagellum 
9-jointed. Peraeopod 5, 24 joint much longer than rest of limb, hind margin 
evenly eurved, serrate. Colour brownish grey, with transverse bands of spots, 
. partly dark greenish. L. © 7 mm. 

ArcticOcean and North-Atlantie (West-Norway); Christianiafjord. Depth 376—752m. 


*) Nom. nov. — The name Andania is preoceupied (1860, Franeis Walker, List 
Lep. Brit. Mus., v.20 p. 57, 223). 


BI nn 1 eb Pr a Ss RT 


Andaniexis, Parandania 95 


A.spinescens (Alcock) 1894 Andania s., A. Aleock in: Ann. nat. Hist., ser. 6 
v.13 p.4ll f. 


Head concealed under peraeon segment 1; pleon segments 1—4 carinate, apically 
dentate. L. nearly 40 mm, 
Bay of Bengal (lat. 10° N., long. 86° E.) Depth 3646 m. 


7. Gen. Parandania Stebb. 


1899 Parandania (Sp. typ.: Andania boecki), T. Stebbing in: Ann. nat. Hist., 
ser.7 v.4 p. 206. 


Side-plate 4 as broad as deep, not deeper than the segment, only in 
part overlapping the 5tt. Peraeon segment 1 as long as 24 and 34 combined. 
Pleon rather large. Pleon segment 3, postero-lateral angles produced, not 


acute. Eyes wanting. Antennae very unequal, flagella 
3 many-jointed. Antenna 1, 1° joint of flagellum 
: and accessory flagellum long (Fig. 19); antenna 2, 
3 ultimate joint of pedunele longer than penultimate. 
3 Epistome carinate. Upper lip short, emarginate. 
4 Lower lip, lobes very broad, distally truncate, with 
4 --. Plagelum  (entiele at outer corner. Mandible short and broad, 
S R eutting edge very broad, straight, smooth. Maxilla l, 
a --- Hagellum inner plate large with a score of plumose setae, outer 
r plate with 9 spines, palp 1-jointed (Fig. 20). Maxilla 2, 
; inner plate broad, with many spines 
2 and setae, outer narrow, apically 
= fringed, and with 2 setules on outer 
R margin. Maxillipeds, inner plates 
2 broad, inflated, setose, not reaching & 
8 apex of 1° joint of palp, outer not = 
E nearly reaching apex of 24 joint of 
; palp, fringed with slender spines; _ en 
E palp’s first 2 joints robust. Gnatho- "°P 
E RER pod 1 robust, 6% joint oval, tapering en 
Ban er distally, rather longer thanthestouter nn 


like gnathopod 1, but longer and less robust, 34 joint in both pairs short. 
Peraeopods 1—5, 4! joint little expanded, long, except in peraeopod 5. 
Peraeopod 4, 24 joint oblong oval, slightly decurrent. Peraeopod 5, 24 joint 
more expanded and decurrent than in peraeopod 4. Uropods 1—3, all the 
rami subequal, except in the 1°t pair slightly armed, in each pair much 
shorter than peduncle. Telson a little longer than broad, oval, entire. 


: 
i | ‚5th, 7th Jinear, curved. Gmathopod 2 


1 species. 


1. P. boecki (Stebb.) 1888 Andania b., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.735 t.36 | 1893 Stegocephalus boecki, A. Della Valle in: F. Fl. Neapel, v.20 p. 628 
t.59 £.36 | 1899 Andania boecki, Parandania sp. typ., T. Stebbing in: Ann. nat. Hist., 
ser.7 v.4 p. 206. 


Head short. Antenna 1 (Fig. 19), pedunele short and thick, flagellum with 
14 joints, 1% longer than rest combined, much longer than peduncle, channelled 
to receive accessory flagellum, which is 1-(2-?)jointed and nearly as long as 
15% joint of primary. Antenna 2 much longer than antenna 1, ultimate joint of 
peduncle more than twice as long as penultimate, flagellum 25-jointed, longer 


96 Parandania, Andaniotes 


than peduncle. Branchial vesicles large, even on peraeopod 5 well developed. 
Uropods 1 and 2 with numerous spines and setae on peduncles, rami 
carinate and spinulose. Uropod 3, pedunele unarmed, rami lanceolate, not 
carinate. L. 22 mm. 


Tropieal-Atlantie (Pernambuco). Depth 1234 m. 


8. Gen. Andaniotes Stebb. 


1897 Andaniotes (Sp. un.: A. corpulentus), T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 v.7 p.80 | 1897 Andaniodes, J.V. Carus in: Zool. Anz., Bibliogr. v.2 p. 622. 


Side-plate 4 slightly deeper than broad, overlapping 5t" and part of 6th, 
Peraeon segment 1 subequal to 24 and 3% combined. Pleon segment 6 longer 
than 4th or 5th, Eyes wanting. Antennae subequal. Antenna 1, 1° joint of 
pedunele very thick, longer than 24 and 34 combined, flagellum slender, with 
4 joints, 1° longer than 1° of peduncle, 4" spiniform; accessory flagellum very 
small, 1-jointed. Antenna 2, ultimate joint of pedunele shorter than penultimate, 
flagellum short. Epistome slightly carinate. Upper lip broader than deep, 
 faintly emarginate. Lower lip, lobes narrow, very widely dehiscent, with 
minute upright spine at apex. Mandible (Fig. 21), cutting edge straight, 
smooth, rather broad, tooth-like secondary plate on left mandible. Maxilla 1, 

inner plate with 7—11 plumose setae, outer with 9 spines, 
palp 1-jointed, with 7 spines. Maxilla 2, inner plate broad, 
denseiy fringed with spines and plumose setae, outer narrow, 
Fig. an. with 9 setae. Maxillipeds, inner plates very broad, with 3 spine- 
A.corpulentus. teeth but not many setae, outer not nearly reaching end of 
Left mandible. palp’s 24 joint, fringed with short spines. Gnathopod 1, 
24 joint broad, especially in JS, 6!" abruptly narrowed distally, rather shorter 
and a good deal narrower than the 5t". Gnathopod 2 slender throughout, 
34 joint elongate, 5" and 6th joints subequal, 6!" narrowly oval. Peraeo- 
pods 1-5, 4 joint decurrent. Peraeopod 4, 24 joint oblong, not very 
widely expanded. Peraeopod 5, 24 joint very broadly oval, as long as rest 
of limb. Uropod 1--3 in d, peduncle robust, rami very short; uropod 1, outer 
ramus-thick, inner thin; uropod 3, rami minute, outer 2-jointed, nearly twice 
as long as inner. In the © uropods 1—3, peduncle less robust, rami all slender, 
in uropod 3 subequal, nearly as long as pedunele. Telson oval, cleft nearly 
to middle. 


1 species. 


1. A. corpulentus (G. M. Thoms.) 1882 Anonysx c., G. M. Thomson in: Tr. N. 
Zealand Inst., v.14 p.231 t.17 f. 1a—f | 1897 Andaniotes c., T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 v.7 p.31 t.8 | 1888 Andania abyssorum, T.'Stebbing in: Rep. Voy. 
Challenger, v.29 p.739 t.37 | 1893 Stegocephalus a., A. Della Valle in: F. Fl. Neapel, 
v.20 p.629. 


Head with small rostrum, lateral eornersrounded, sides produced downward. 
Pleon segment 3, lateral angles narrowly rounded, dorsum bent, in 9 distally 
furnished with 2 small humps; segment 6 doubly ridged. Antenna 2, flagellum 
with 8 joints. Apical narrowing of 6% joint of gnathopod 1 more abrupt in © 
than in JS; gnathopods 1 and 2 are furnished with various spines and setae, many 
serrate or plumose. Peraeopod 3, 24 joint scarcely perceptibly dilated. The 
sexual variation in the uropods is very marked. L. 7 mm. 


South-Pacifie (New Zealand). Deptlis 2012 (Challenger Exp.), 15 m (G.M. 
Thomson). 


R: 
g 
De 
Pi 
=" 
u": 
= 
6° 
je 
(a 
a. 
BP: 
ze 
Fi 
Ei 
2 


Tu 


Euandania, Stegocephalidarum species dubiae, Ampeliseidae ‚97 


9. Gen. Euandania Stebb. 
1899 Euandania (Sp. typ.: Andania gigantea), T. Stebbing in: Ann. nat. Hist, 


ser. 7 v.4 p. 206. 


Side-plates much shallower than the segments, 4th yather broader than 


‘deep, only in part overlapping 5tl. Peraeon segment 1 as long as 24 and 34 
‚combined. Pleon much smaller than peraeon. Pleon segment 3, postero-lateral 
‚angles produced, scarcely acute. Eyes wanting. Antennae not very unequal, 


flagella many-jointed. Antenna 1, 1° joint of flagellum and accessory flagellum 


long. Antenna 2, ultimate joint of peduncle longer than penultimate, flagellum 
_ shorter than in Parandania (p. 95). Mandible widened at the middle, cutting 
edge broad, straight, smooth, accessory plate of right mandible small. Lower 
‚lip, lobes widely, not deeply, dehiscent, broadly rounded, without mandibular 
‚processes. Other parts of the mouth as in Parandania, except that setae and 


spines on inner plate of maxillae 1 and 2 are more numerous, and there are 
no setules on outer margin of outer plate of maxilla 2. Gmathopods 1 and 2, 
peraeopods 1—5 and uropods 1—3 nearly as in Parandania. Telson small, 


‘oval, celeft less than half its length. 


» 1 species. 


1. E. gigantea (Stebb.) 1888 Andania g., T. Stebbing in: Rep.Voy. Challenger, 
v.29 p.730 t.35 | 1893 Stegocephalus giganteus, A. Della Valle in: F. Fl. Neapel, v.20 
p- 628 t.59 f.37 | 1899 Andania gigantea, Euandania sp. typ., T. Stebbing in; Ann, 
nat. Hist., ser.7 v.4 p. 206. 


Head short. Peraeon segments greatly dilated. Antenna 1, peduncle 
short and thick, flagellum with 14 joints, 1° much longer than peduncle or 
rest of flagellum, grooved to receive accessory flagellum, which consists of 


‚1 joint nearly as long as 1° of primary. Antenna 2, ultimate joint of 


peduncle much thinner than penultimate, twice as long, flagellum with 25 joints, 


‚shorter than peduncle. L. 38—50, height 18—38 mm. 


South-Paeifie (between lat. 46° and 470 S.). Depths 2926 and 3430 m. 


Stegocephalidarum species dubia. 


Stegocephalus latus Hasw. 1880 8$.1., Haswell in: P. Linn. Soc. N.S. W er 
v4 p.252 .8 f.2| 1885 S.1., Haswell in: P. Linn. So N.S. Wales, v. 10 p.97 t.11 £.7—12 


Resembling Stegocephaloides (p. 91). L. about 10 mm. 
South-Paeifie (Tasmania, New South Wales). 


3. Fam. Ampeliscidae 
1857 Tetromatides, Bate in: Ann. nat. Hist., ser.2 v.19 p.189 | 1857 Ampeliscades, 


‚Bate in: Ann. nat. Hist., ser.2 v.20 p.525 | 1857 Subfam. Ampeliscini, A. Costa in: 
 Mem. Ace. Napoli, v.1 p.173 | 1861 Subfam. Ampeliscides, Bate & Westwood, Brit. sess. 


Crust., v.1 p.124 | 1865 Subfam. Ampeliseina, W. Lilljeborg in: N. Acta Soc. Upsal., 
ser.8 v.6 nr. 1 p.18 | 1871 Subfam. Ampeliscinae, A. Boeck in: Forh. Selsk. Christian., 
1870 p.220 | 1876 Ampeliscaidae, A. Boeck, Skand. Arkt. Amphip., v.2 p.516 | 1882 
Ampeliseidae, G. O. Sars in: Forh. Selsk. Christian., nr. 18 p.29 | 1891 A., G. O. Sars, 
Crust.. Norway, v.1 p. 162. 


Front of head narrowly truncate, without rostrum. Side-plate 1 setose 
on lower margin. Pleon segments 5 and 6 coalesced (Fig. 25 p. 108). Eyes 


‚frequently 4, exceptionally 6, sometimes 2, or wanting; each eye with or 


Das Tierreich. 21. Lief.: T.R.R. Stebbing, Amphipoda I. 7 


TE N EN ERE RE a En e rLt 


9; Ampeliseidae, Ampelisca 


without a lens-shaped thickening of its cornea; sometimes ocular pigment 


present without lenses. Antenna 1 attached at apex of head, without accessory 
appendage; antenna 2 far back below. Upper lip helmet-shaped, minutely 
incised; lower lip 4-lobed. Mandibie (Fig. 28), maxillae 1 and 2, maxillipeds 
with all the normal parts well developed. Inner plate of maxilla 1 sometimes 
without setae, sometimes with 1 or 2. Base of maxillipeds fringed with 


feathered setae and the outer plates armed with strong spine-teeth on inner 


margin. Gnathopods1 and 2 imperfectly subchelate, the 5t" joint never shorter 
than the 6%; gnathopod 2 longer and more slender than gnathopod 1 (unless 
Ampelisca australis be an exception). Peraeopods 1 and 2 (Fig. 22) with 


4th joint very large, usually longer and more setose in peraeopod 1 than in. 


peraeopod 2, 7! joint slender, elongate. Peraeopods 3 and 4, 24 joint very 
broad, 5th Jong and strongly spined, 6!" and the minute 7!" retroverted. Peraeo- 
pod 5 (Fig. 23, 26, 27,29) unlike the preceding, varying in the different genera. 
Branchial vesicles transversely pleated. Cleft of telson (Fig. 24) generally very 


deep, sometimes minute. Antennae 1 and 2, uropod 3 generally, and occasionally_ 


peraeopod 5 and telson wery in the two sexes. Glutiniferous apparatus extensive. 
Marine. 


3 genera, 40 accepted and 7 doubtful species. 


Synopsis of the genera: 


Peraeopod 5 (Fig. 23, 26), 24 joint without setae 
between its expansion and the 3d joint, 6th 
foliaceous, 7th lanceolate, . - . 2.2... l. Gen. Ampelisca . p. 98 
\) Peraeopod 5 (Fig. 27, 29), 2d joint with setae 
| between its expansion and the 3d joint, 6th 
narrow, 7th spiniform — 2. 
Oo 


2 


N A RE ERST EI NEN 2. Gen. Byblis .. . p.111 


Peraeopod 5 (Fig. 27), 24 joint much widened 
| Peraeopod 5 (Fig.29), 24 joint not widened distally 3. Gen. Haploops. . p.116 


1. Gen. Ampelisca Kroyer 


1842 Ampelisca (Sp. un.: A.eschrichtiti), Kreyer in: Naturh. Tidsskr., v.4 p. 154 | 
1888 A., T. Stebbing in: Rep. Voy. Challenger, 0.29 p.1035 | 1891 A., G.O.Sars, Crust. 
Norway, v.1 p.164 | 1893 A. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 469 | 1846 
Ampelisia (laps.), Kroyer in: Voy. Nord, Orust. 1.23 f.1 | 1853 Pseudophthalmus, 
Stimpson in: Smithson. Contr., ©.6 nr.5.p.57 | 1853 Araneops, A. Costa in: Rend. 
Soc. Borbon., n. ser. v..2 p.169 | 1856 Tetromatus, Bate in: Rep. Brit. Ass., Meet. 25 
p.58 | 1857 T., Bate in: Ann. nat. Hist., ser.2 v».19 p.139 | 1887 Amplisca (laps.), 
Cheyreux in: Bull. Soc. zool. France, v.12 p. 574.- 


Head with postero-antennal corners obsolete. Side-plate 1 scarcely deeper 
than 24, often concealing base of antenna 2; side-plate 4 with rare exceptions 
(as A. odontoplax), obliquely truncated below the posterior angle (Fig. 25). 
Corneal lenses 4 or none. Mandibular palp with 24 joint generally laminar, 
34 ]inear and rather short. Peraeopods 3 and 4 with 24 joint very broad, its 
front edge strongly eurved in the middle, 5!" joint carrying a simple series 
of spines within the hinder margin. Peraeopod 5 (Fig. 23, 26), 24 joint 
variously expanded so that the greatest breadth is sometimes lowest (transversely 
truncate), sometimes more or less median (obliquely truncate), the margin 
forming the lower side of the triangle being fringed with plumose setae; the 
following joints varying much in relative size, the 6! foliaceous, the 7%" lanceolate. 
Uropod 3 (Fig. 24) reaching considerably beyond the others, rami foliaceous, 


4.78 "Yes Fk EP u 2 DEE 


ea N “ 
Ze a Sa a a ee eier 


wei ER reHN RR 7 k UNS 
Oil Ds ba Da WB 2 a a ad Zn al 0“ le ı a 9 A By 


SER 


Ampelisca 


inner broader than outer. Telson (Fig. 24) oblong, cleft nearly to the base. 


Two pairs of hepato-pancreatic caeca. 
25 species accepted, 7 insuffieciently described. 


Synopsis of the accepted species: 


‚Peraeopod 5, 34 joint shorter than 4th — 2. 


si Peraeopod 5, 34 joint longer than 4th — 10. 


Eyes present — 8. 

Eyes wanting — 8. 

Pleon segment 3, postero-lateral margin bisi- 
nuate — 4. x 

Pleon segment 3, postero-lateral ar not 
bisinuate — 7. 

Telson without dorsal setules. . . ..... 

Telson with dorsal setules — 5. 

Peraeopod 1, 4th joint with produced distal lobe 

Peraeopod 1, 4th joint without produced distal 
lobe — 6. 


2 


4 


5 


Pleon segment 4, dorsal carina little elevated 


6 | Pleon seginent 4, dorsal carina much elevated 


Pleon segment 3, postero-lateral angles qua- 


drate, antenna 1 much shorter than antenna2 


Pleon segment 3, postero-lateral angles rounded, 
antenna 1 not shorter than antenna 2. . 


Antenna 1, flagellum many-jointed ..... . 


| Antenna 1, flagellum few-jointed — 9. 
[ Peraeopod 5, 6th joint longer than 5th .... 
Peraeopod 5, 6th joint shorter than 5th... . 
Gnathopod 2 shorter and stouter than gnatho- 
1 


8 


a er ee ee 
Gnathopod 2 not shorter or stouter than 


gnathopod 1 — 1. 
# Antenna 2 very much longer than antenna 1 —18. 
Cornea not thiekened to a lens — 13. 
Cornea thieckened to a lens — 15. 
Antenna 2, ultimate joint of pedunele not longer 
0 
Antenna 2, ultimate joint of pedunele longer 
than penultimate — 14. 
Pleon segment 3, angles slightly produced. . 
Pleon segment 3, angles not produced 
aRaae Tome ge 7.02. 
Corneal lenses small — 16. 
Pleon segment 4 with elevated earina. . 
Pleon segment 4, cearina not elevated — 17. 


13 


14 


15 


er 


6 ‘ 


Peraeopods 1 and 2, 7th joint not longer than. 


a EP 


EN a Re 

Peraeopods 1 and 2, 7th joint much longer than 
5th and 6th — 19. 

Peraeopods 1 and 2, 7th joint not much longer 

than 5th and 6th — 20. 


18 


1. A. eschrichtü . ... 


2. A. brevicornis. . . 
“ 


3. A. macrocephala. . 
4:4: 81DbAa. 2... ; 


0. A: Tann 2 
7. A. odontoplax . 


8. A. uncinata . . 
9. A. abyssicola 


10. Alaustralis . .. . 


Antenna2 not very much longerthan antenna 1— 12. 


11. A, rubelle  ; -.:.*.. 


12. A.amblyops... .‘. 
13-3. pusilla. . . 
14, A.anomala . .. . 


15. A. spinipes 


16. A. aequicornis. . 


17. A. serraticaudata 


7x 


100 


19 j Head obliquely truneate . .» . 2...» 18. A.diadema . . . . p. 107 
\ Head transversely truncate. .. 2... 19. A. acinaces . . . . p.108 
00 f Antenna 2 very shot ..» - v2... 20. A. spinimana . . . p.109 
| Antenna 2 not very short — 21. i 
1. j Cornea not forming a lens. .. 2... 21. A. compacta. . . . p.109 
\ Cornea forming a lens — 22. 


Pleon segment 4, dorsal apex raised above 
| segment 5 — 23. 


= | Pleon segment 4, dorsal apes not raised above 
segment 5 — 24. e 
98 j Peraeopod 5, finger not longer than 6th joint 22. A.typica ..... p- 109 
\ Peraeopod 5, finger longer than 6th joint . . 23. A. zamboangae . . p.110 
4 f Head obliquely truneate.... . 2.2... 24. A. tenuicornis . . . p.110 
\.Head transversely truneate. ... .... . Be. ee p. 111 


1. A. eschrichtii Kreyer 1842 A.e., Kroyer in: Naturh. Tidsskr., v.4 p.155 | 1891 
A.e., A. eschrichti, G. O. Sags, Crust. Norway, ».1 p.174 t.61 f.1 | 1893 A. eschrichtiüi 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p.475 | 1894 A. e., T. Stebbing in: Bijdr. 
Dierk., v.17 p.17 | 1862 A. ingens (Pseudophthalmus i. Stimpson in MS.), Bate, Cat. 
Amphip. Brit. Mus., p.92 t.15 f.2 | 1871 A. dubia + A. eschrichti + A. propingva, 
A: Boeck in: Forh. Selsk. Christian., 1870 p. 224, 225. 


Peraeon segments 6 and 7 and pleon segments 1—4 dorsally carinate, 
composite 5t" and 6!" of pleon with a pair of tubercles flanking an excavation. 
Pleon segment 3 with margin moderately sinuous over acutely prominent 
postero-lateral angles. Corneal lenses distincet, lower pair a little removed 
from lower front corners of head, pigment well defined, bright red. Antenna 1 in 
Q reaching beyond peduncle of antenna 2, flagellum 2'/, times as long as 
peduncle, with 30 joints. Antenna 2 twice length of antenna 1, ultimate and 
penultimate joints of peduncle subequal. Peraeopods 1 and 2, 7! joint con- 
siderably longer than 5!" and 6% combined. Peraeopod 5, 24 joint longer than 
all the rest of the leg, produced below the 34, expansion obliquely truncated, and 
lower corner broadly rounded, 5!" joint projeeting anteriorly, 6% narrow, shorter 
than 4 and 5% combined, 7!" more than half length of 6%. Uropod 3 
with rami lanceolate, fringed with plumose setae and a few spinules. Telson 
oblong, with a small denticle at the side of each acute apex, without any 
dorsal spinules.. Body semipellueid, tinged with yellowish, mottled with 
orange and pinkish pigment. L. reaching 30 mm. 


Aretie Ocean, widely distributed; Skagerrak (Bohuslän). Depths to 254 m. 


2. A. brevicornis (A. Costa) 1853 Araneops b., A. Costa in: Rend. Soc. Borbon., 
n. ser. v.2 p.171 | 1893 Ampelisca b. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.473 - 
t.4 1.4; 1.37 1.29; 1.38 £.3.5,6,9, 18; 1.43 £.20; t.44 £.26—28; t.45 f.5—10 (but 
see p.109); t.47 f.5--16 | 1855 A. Iaevigata, W. Liljeborg in: Öfv. Ak. Förh., «12 
p-123 | 1891 A.1., G. ©. Sars, Crust. Norway, v.1 p.169 t.59 f.1 | 1856 Tetromatus 
bellianus, Bate in: "Rop. Brit. Ass., Meet.25 p.58 1.17 £.D5 | 1857 T.b., Bate in: Ann. 
nat. Hist., ser.2 v.19 p. 139. 


Pleon segment 3 deeply bisinuated over acutely prominent postero- 
lateral angles, segment 4 with small dorsal hump at the end. Corneal lenses 
small, distinet, lower pair at lower corners of head, pigment dark brownish 
(Sars) or bright red (Della Valle). Antenna 1 in O not (in G scarcely) reaching 
beyond penultimate joint of peduncle of antenna 2, flagellum with 10 joints, not 
twice length of pedunele; antenna 2 in Q scarcely more than half length of body, 
ultimate joint of pedunele much shorter than penultimate. Peraeopod 1, 4% joint 


et. 
._ 


$- 
ER 
re 
ve 
2 


- 


Ampelisca 101 


with produced lobe. Peraeopods 1 and 2, 7tk joint considerably longer than 
5th and 6 combined. Peraeopod 5, 24 joint shorter than rest of leg, the 
expansion transversely truncate, reaching end of 34 joint, 4!" completely 
overlapping the triangular 5!" with a setose lobe behind, 6th oval, broad, as 
long nearly as the 3 preceding combined, 7% narrowly lanceolate about half 
length of 6%. Uropod 3 with rather broad foliaceous rami, carrying plumose 


 setae on confronted edges. Telson about twice as long as broad, slightly constrieted 


near base, triangularly tapering distally, here carrying within each outer 
margin a row of setules; cleft for */, length. Body whitish, pellueid, mottled 
with dark brown stars, head and front legs speckled with light yellow. L. 7—9 
(Della Valle), 12 mm (Sars). * 


Aretic Ocean, North-Atlantie, North-Sea and Skagerrak (South- and West-Norway, 
northwards to Lofoten Isles, British Isles, France); Kattegat; Mediterranean. 


3. A. macrocephala Lilj. 1852 A. m., W. Liljeborg in: Öfv. Ak. Förh., v.9 p.7| 
1891 A. m., G.O. Sars, Crust. Norway, v.1 p.172 t.60 £.1| 1894 A. m., T. Stebbing 
in: Bijdr. Dierk., e.17 p.17 | 1874 A. eschrichtii (err., non Kreyer 1842!), Buchholz in: 
Zweite D. Nordpolarf., v.2 p.375 Crust. t.13 f. 1 | 1893 2 e. (part.), A. Della Valle in: 


-F. Fl. Neapel, v.20 p. 475. 


Pleon segment 3 sinuous above acutely prominent postero-lateral angles, 
segment 4 with dorsal carina little elevated. Corneal lenses very small, 
distinet, lower pair at lower corners of head, pigment somewhat irregular, 
bright red. Antenna 1 in O reaching end of peduncle of antenna 2, flagellum 
twice length of peduncle, 12-jointed. Antenna 2 in O scarcely more than half 
length of body, ultimate joint of peduncle shorter than penultimate. Peraeo- 
pods 1 and 2, 7! joint subequal to 5t% and 6! combined. Peraeopod 5, 2% joint 
subequal in length to rest of leg, expansion transversely truneate, descending 
below 34 joint with its full breadth instead of in a lobe, 4" joint forming a 
small setose lobe behind, 5t% carrying 3 long plumose setae on the hinder 
angle, 6!" equal in length to 4 and 5" combined. Uropod 2, outer ramus 
with long spine near apex. Uropod 3 with rami broadly lanceolate. Telson 
oblong oval, with 4 pairs of dorsal spinules and 1 pair at the blunted tip. 
Body whitish, pellueid, sides mottled with pinkish and yellowish specks. 
L. 9 14 mm, | rather less. 


Arctie Ocean; North-Atlantie, North-Sea and Skagerrak (British Isles, whole 
Norway); Kattegat. 


4. A. gibba O.Sars 1882 A.g., G.O.Sars in: Forh. Selsk. Christian., nr. 18 
p-107 t.6 £.1, 1a | 1891 A.g., G. O. Sars, Crust. Norway, v.1 p.171 t.59 f.2 | 1893 
A. brevicornis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 473. 


Pleon segment 3 bisinuate not very deeply. over acute, moderately 
prominent postero-lateral angles, segment 4 with pronounced dorsal hump at 
the end. Corneal lenses distinet, lower pair a Nittle behind lower corners 
of head, pigment well defined, bright red. Antenna 1 in O searcely reaching 
beyond penultimate joint of peduncle of antenna 2, 24 joint more elongated than 
in A. brevicornis (p. 100), flagellum with 6 joints, about as long as peduncle; 
antenna 1 in J not reaching end of peduncle of antenna 2. Antenna 2 in © not 
quite as long as body, very slender, ultimate joint of peduncle a little shorter 
than penultimate. Peraeopods 1 and 2, 4 joint narrower than in A. brevicornis, 
without produced distal lobe, 7 longer than 5!" and 6tk combined. Peraeo- 
pod 5, 24 joint subequal to rest of leg, expansion transversely truncate, characters 
of limb as in A. brevicornis, but lobe of 4% joint much smaller with only 


102 Ampelisca 


3 setae at the tip, the 7*k joint ending in a little curved nail. Uropod 3 
with foliaceous rami, not very broad and nearly naked. Telson in Q shorter 
and broader than in A. brevicornis, otherwise similar, narrow in d. Pellucid, 
except for a few yellowish specks in front, ova in pouch orange-coloured. 
L. © 8, 5 7 mm. 


North-Atlantie, North-Sea and Skagerrak (South- and West-Norway, northwards 
to Trondhjemsfjord). Depth 94—-282 m, muddy ground. 


5. A. chiltoni Stebb. 1888 A.c., T. Stebbing in: Rep. Voy. Challenger, v.29 
p. 1042 t. 103 | 1893 A. propinqua (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 484. 


Head transversely truncate. Pleon segment 3 with postero-lateral 
corners almost quadrate, minutely produced, segment 4 dorsally ending 
angularly. Corneal lenses 4, lower pair occupying lower corners of head. 
Antenna 1 in © not reaching end of pedunele of antenna 2, 24 joint scarcely 
twice length of 1°, flagellum with 9 joints, somewhat longer than peduncle; 
antenna 2 in O about half length of body, ultimate-joint of peduncle a little 
shorter than penultimate, flagellum with about 25 joints, not much longer than 
peduncle. Mandibular palp slender, 34 joint shorter than 24 Maxilla 1 with 
2 small setae on inner plate. Peraeopods 1 and 2, 7*k joint longer than 5th and 
6 combined. Peraeopod 5 as in A. eschrichtii (p. 100). Uropod 3 as in 
A. eschriehtii. Telson oblong, with 3 pairs of dorsal spinules and 1 pair in 
the blunt emarginate apices. L. 15 mm. 


South-Paeifie (New Zealand). Depth 282 m. 


6. A. fusca Stebb. 1888 A. f, T. Stebbing in: Rep. Voy. Challenger, v. 29 
p. 1052 t.105 | 1893 A. f., A. Della Valle in: F. Fl. Neapel, v.20 p. 483. 


Head transversely truncate. Side-plates 1—3 with a tooth at lower hind 
corner, 4% with lower and hind margins at right angles. Pleon segments 3 
and 4 slightly carinate, segment 3 
with postero-lateral angles gently 
. rounded. Corneal lenses 4, lower 
pair removed from lower corners of 
the head,- projecting from lower 
margin. Antenna 1 in O longer than 
antenna 2, 24 joint more than twice 
as long as 1°, flagellum with 34 
joints, much longer than peduncle; 
antenna 2 nearly as long as the 
body, ultimate joint of pedunele 
shorter than penultimate, flagellum 
with 18 slender joints, shorter than 
pedunele of antenna 2 and shorter 
than flagellum of antenna 1. Man- 
dibular palp with 24 joint rather 
broad, 3% narrower and shorter. 


Fig. 22. Fig. 23. Maxilla 1 with 2 small setae on 
Peraeopod 2. Peraeopod 5. inner plate. Peraeopods 1 and 2 
Fig. 22 and 23. A. fusca. (Fig. 22), 7th joint much longer 


Peraeopods 2 and 5. R 
% 2 than 5th and 6t" combined. Peraeo- 


pod 5 (Fig. 23), 24 joint with expansion obliquely and evenly rounded, reaching 
end of 4th joint, which with its strongly plumose hind lobe is much longer 


RT, 


Ampelisca 103 


than the 34; the 5tk produced in front is as long as the 4tk; the 6t% is a little 
longer than the 5tk; the lanceolate 7" ®/, length of 6%. Uropod 3 (Fig. 24) with 
broad foliaceous rami, plumose on the 
confronted margins. Telson (Fig.24) nearly _ 
twice as long as broad, cleft */, length, 
the distal half triangularly tapering to 
the acute apices, each carrying a spinule; % 
on the surface within the margins are Telson -17- 
6 or more pairs of setules. The specimens Uropod 3 - 
in spirit dark coloured, the branchial vesicles 
in partieular being Zee mIne:; coloured. 
L. about 13 mm. | 

Southern Indian Ocean (Cape Agulhas). wia3r KR Tancn. 
Depth 282 m. Uropod 1ı—3 and telson. 


7. A. odontoplax O.Sars 1879 A.o., G. 0. Sars in: Arch. Naturv. Kristian., 
v.4 p.454 | 1885 A.o., G. O. Sars in: Norske Nordhavs-Exp., v.6 Crust. I p. 196 t. 16 
f.4 | 1891 A. o., G.O. Sars,. Crust. Norway, v.1 p.176 t.61 f.2 | 1898 4A. o., A. Della 
Valle in: F. Fl. Neapel, v.20 p. 485. 


Head earinate dorsally. Side-plates 1—-3 with distinct tooth at lower 
hind corner, 4b with hind and lower margins in a continuous eurve. Pleon 
segments 1—4 with carina, that of 4 ending angularly, postero-lateral 
angles of 34 segment slightly produced and acute. Eyes none. Antenna 1 in 
Q about half length of body, rather more than half of antenna 2, 24 joint of 
pedunele twice length of 1%, flagellum with 32 joints, scarcely twice length of 
peduncle. Antenna 2, ultimate joint of peduncle shorterthan penultimate. Gnatho- 


. pod 1, 6% joint a little shorter than 5, Peraeopods 1 and 2, 7 joint considerably 


longer than 5t" and 6!" combined. Peraeopod 5, 24 joint broad, scarcely as 


‚long as rest of leg, expansion nearly transversely truncate, reaching a little 


below the short 34 joint, 6% longer than 4!" and 5!" combined, 7!" more 
than half length of 6", narrowly lanceolate. Uropod 2 with rami very 
spinose on inner margin, and carrying a long terminal spine; uropod 3, rami 


‘ lanceolate, fringed with setae and spines. Telson oblong oval, with 2 pairs 


of dorsal spinules and a spinule in the emargination of each apex. Whitish, 
pellueid, with no distinet pigmentation. L. © 18 mm. 


North-Atlantie and Arctic Ocean (Trondhjemsfjord, Helgeland, West-Finmark). 
Depth 267 m. 


8. A. uncinata Chevreux 1887 A. u., Chevreux in: Bull. Soc. zool. France, 
v.12 p.573 | 1893 A. brevicornis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 473. 


Resembling A. gibba and A.brevicornis (p. 101, 100). Head obliquely 
truneate. Side-plates 1—3 with small tooth at lower hind corner. Pleon segment 3, 
postero-lateral angles acute and recurved, segment 4 with high compressed 
carina, ending angularly, following segments slightly cearinate. Eyes none. 
Antenna 1 not reaching end of penultimate joint of pedunele of antenna 2, 
24 joint '/;, longer than 1%, flagellum 10-jointed. Antenna 2 a little longer 
than the body, pedunele ?/, of whole length, ultimate joint of peduncle a little 
shorter than penultimate. Peraeopods 1 and 2, 7% joint longer than 5!" and sth 
combined. Peraeopod 5, 24 joint reaching nearly to middle of 4%; the 4! with 
curved and angular lobe descending below the 5tk; the 6 hroad and oval; the 
7th nearly as long as the 6!%, very strongly ceurved in form of a hook at its 
extremity. Uropod 3, rami lanceolate, dilated at the base, almost entirely smooth. 


% ” 
a ee ee 0 0 


104 Ampelisca 


Telson with 6 or 7 stiff setae on each side, its shape as in A. gibba ©. 
Colour after long preservation in ‚spirit still keeping a green tint. L. 7 mm. 


North-Atlantie (Cape Finisterre). Depth 510 m. 


9. A. abyssicola Stebb. 1888 A. a@., T. Stebbing in: Rep. Voy. Challenger, 
e.29 p.1047 t.104 | 1893 A. a., A. Della Valle in: F. Fl. Neapel, v.20 p. 477, 


Head transversely truncate. Side-plates 1—3 with small tooth at lower 
hind corner, 4!h with lower and hind margins almost continuous. Pleon segment 3 
with postero-lateral corners quadrate, segment 4 impressed and with carina 
dorsally ending angularly. Eyes wanting. Antenna 1 in O not nearly reaching 
end of peduncle of antenna 2, 24 joint nearly twice length of 1%, flagellum 
10- or 11-jointed, scarcely as long as pedunele; antenna 2 nearly as long as body, 
ultimate joint of peduncle slightly longer than penultimate. Mandibular palp 
with 24 joint long and rather broad, 3% much shorter and narrower, but not 
very narrow. Maxilla 1 with two setae on inner plate. Gnathopod 1, 5th 
and 6th joints stout. Peraeopods 1 and 2, 7! joint a little longer than 5t" and 
6‘h combined. Peraeopod 5, expansion obliquely .rounded, reaching nearly 
to end of 4th joint, 34 and 4tk joints both short, 5tt longer than both combined, 
produced downwards in front, 6! oval, eonsiderably shorter than 5tk and 
scarcely longer than the lanceolate 7%. Uropod 3 with lanceolate rami, 
serrate on both margins and furnished with spines and plumose setae. Telson 
not twice as long as broad, deeply cleft, with 4 pairs of spinules within the 
margins, the apices broad, each with a spinule. L. 16 mm. 


Tropical Atlantie (Virgin Islands Culebra and St. Thomas). Depth 714 m. 


10. A. australis Hasw. 1880 A.a., Haswell in: P. Linn. Soe. N.S.Wales, v.4 
p.257 t.9 f.1 | 1882 A.a., Haswell, Cat. Austral. Crust., p.235 | 1885 A.a. (part.?), 
Haswell in: P. Linn. Soc. N.S.Wales, ©. 10 p.97 t.12 £.7—16; t.13 £.1—4 | 1893 A. a., 
A. Della Valle in: F. Fl. Neapel, v.20 p. 471. 


Eyes not mentioned or figured, perhaps but not certainly to be presumed 
from generie account adopted in Haswell’s Catalogue. Antenna 1 not nearly 
reaching end of peduncle of antenna 2; antenna 2 about twice as long as 
antenna 1, ultimate joint of peduncle shorter than penultimate, flagellum with 
about 10 slender joints. Gnathopod 1, 6t% joint about as long as 5tt. Gnathopod 2 
similar to gnathopod 1, but shorter and slightly stouter [?|. Peraeopods 1 
and 2, 7tk joint as long as 5tl and 6tk combined. Peraeopod 5 with 
4th joint very short and broad, 5% longer than 4 or 6", 7th Jong, slender 
and slightly curved (measurements agree nearly with those of peraeopod 5 
in A. abyssicola). Uropod 3, rami broad lanceolate, the outer armed on one 
border, the inner on both with slender setae. Telson squamiform, cleft, 
rounded posteriorly. L. about 9 mm. (Figures of peraeopod 5 given by 
Haswell 1885 are at variance with the descriptions of 1880, 1882.) 


Port Jackson, Port Denison and Port Stephens [East-Australia]. Depth 9—11 m. 


1l. A. rubella A. Costa 1864 A.r., A. Costa in: Annuario Mus. Napoli, ©.2 
p.153 t.2 £.7| 1888 A.r., T. Stebbing in: Rep. Voy. Challenger, v.29 p.346 | 1895 
A.r. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.109, 482 t.2 f.4; t.37 £.21; t.38 
£. 1,4, 10, 16; 1.45 £.6. 


Head truncate nearly transversely, but with upper comer a little 
prominent. Pleon segment 3 moderately sinuous above bluntly projecting 
postero-lateral angles. Corneal lenses wanting; crimson pigment not very 
brilliant; rudiments of a 3@ pair of eyes conspicuous. Antenna 1 about as 
long as antenna 2, peduncle reaching beyond penultimate joint of peduncle of 


Ampelisea 105 


antenna 2, 24 joint not quite twice as long as 1%, flagellum with 20 joints, more 
than twice as long as peduncle; ultimate and. penultimate joints of antenna 2 
equal. Peraeopods 1 and 2, 7" joint shorter than 5tt and 6! combined. Peraeo- 
pod 5, 24 joint longer than rest of leg, expansion broadly rounded, reaching 
end of 34 joint, which is longer than 4"; 6% fully as long as 4% and 5th 
combined, itself short and broad; 7% not much shorter than 6%. Uropod 3 
with broad rami. Telson having only a spinule at each apex. Colour deep 
red (Costa) or pearl-grey, pellueid with a slight tendeney on the appendages 
to violet (Della Valle). L. 6 mm. 


Mediterranean. Among algae. 


! 12. A.amblyops O.Sars 1891 A.a., G.O.Sars, Crust. Norway, v.1 p. 180 
t.63 f.1 | 1893 A. aequicornis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 907, 917. 


Side-plate 1 not concealing base of antenna 2, 4! having hind and 
lower margins defined by an obtuse angle. Pleon segment 3 with postero- 
lateral angles slightly produced, 4 with carina ending in a prominent 
blunted angle. Corneal lenses absent, but patches of reddish pigment present 
at the ocular positions. Antenna 1 in Q not much shorter than antenna 2, 
peduncle reaching beyond penultimate joint of peduncle of antenna 2, 24 joint 
more than twice as long as 1°, flagellum with 25 joints, twice length of peduncle; 
antenna 2 not as long as body, ultimate joint of peduncle longer than penultimate. 
Gmathopod 1, 6!" joint a little shorter than 5%. Peraeopods 1 and 2, 7! joint 
subequal to 5t" and 6" combined. Peraeopods 3 and 4 comparatively elongate, 
slender. Peraeopod 5, 24 joint considerably longer than rest of leg, expansion 
obliquely truncate, reaching to end of 34 joint, which is longer than the 4%, 
6th scarcely as long as 4! and 5tb combined, 7tk lanceolate, about half 
length of 6, TUropod 3 broad, foliaceous, with a few scattered setae. 
Telson oblong oval, with 2 pairs of dorsal spinules and a pair at the 
unemarginate apices. Highly pellueid, nearly colourles. L © 8 mm. 


Christianiafjord and Trondhjemsfjord. Depth 188—282 m. 


13. A. pusilla O.-Sars 1891 A.p., G. O. Sars, Orust. Norway, v.1 p.181 t.63 
f,2 | 1893 A. aequicornis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 907, 917. 


Closely approaching A. rubella (p. 104). Front of head obliquely 
emarginate, lower corner little projeeting. Side-plate 1 not concealing base 
of antenna 2. Pleon segment 3, lower hind corners quadrate, 4 scarcely 
carinate in S, more distinetly and with deep anterior saddle-shaped depression 
in d. Corneal lenses absent, but patches of pigment representing the eyes. 
Antennae 1 and 2 in O subequal, little more than half length of body; peduncle of 
antenna 1 reaching beyond penultimate joint of pedunele of antenna 2, 24 joint 
twice as long as 1°; antenna 2, ultimate joint of peduncle longer than penultimate. 
Gnathopod 1, 6" joint fully as long as 5t%, Peraeopods. 1—4 asin A. amblyops. 
Peraeopod 5, 24 joint little longer than rest of leg, expansion broad, obtusely 
truncated in Q, narrower and more obliquely truncated in d, reaching 
below the 34 joint, which is longer than the 4!h; 6th Jonger than 4! and 5th 
combined, 7! more than half the length of the 6. Uropod 3, rami not 
very broad, slightly armed. Telson without dorsal spinules.. Body whitish, 
pellueid, with a faint rosy tinge on front of body and side-plate 1. L. © 
scarcely more than 5 mm. 

North-Sea, Skagerrak, North - Atlantie and Aretic Ocean (South- and West- 


Norway, and northwards to Selsövig exactly at the polar eirele). Depth 188—376 m, 
muddy ground. 


106 Ampelisca 


14. A. anomala 0. Sars 1882 A. a, G. O. Sars in: Forh. Selsk. Christian., 
nar.18 p.108 t.6 f.2| 1891 A.a., 6. O. Sars, Orust. Norway, v.1 p.178 t.62 f.2 | 1893 
A. aequicornis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.478. _ 


Head transversely truneate, emarginate, lower corner acutely produced. 
Side-plate 1 not eoncealing base of antenna 2. Pleon segment 3, lower 
hind corners quadrate; 4" with distinet carina ending angularly. Corneal 
lenses larger but less refractive than usual, lower pair removed from lower 
corners and lower margin of head, pigment well defined, reddish. Antenna 1 
in © considerably more than half as long as the body, peduncle reaching beyond 
penultimate joint of peduncle of antenna 2, 24 joint twice as long as 1°t, flagellum 
30-jointed, 2?/, times as long as pedunele; antenna 2 nearly as long as 
body, 1'/, length of antenna 1, ultimate joint of pedunele longer than pen- 
ultimate. Gnathopod 1, 6% joint nearly as long as 5f"; onathopod 2 differing from 
gnathopod 1 less than usual. Peraeopods 1 and 2, 7*% joint considerably longer 
than 5 and 6!" combined. Peraeopods 3 and 4 with 5t% joint rather elongate. 
Peraeopod 5, 24 joint longer than rest of leg, expansion obliquely rounded, 
not reaching below 34 joint, which is longer than the 4th, 6th fully. as long 
as 4 and 5% combined, 7! more than half length of 6%. Uropod 3, 
rami foliaceous, fringed with a few setules. Telson oval, searcely twice as 
long as broad, without dorsal spinules. Body highly pellueid, nearly colour- 
les. L. 9 7 mm. 

North-Sea (Korshavn [West-Norway]), Hardängerfjord, Christianiafjord, North- 
Atlantie (Cape Finisterre). Depth 188—-376 m. 


15. A. spinipes Boeck 1861 A.s., A. Boeck in: Forh. Skand. Naturf., Mode 8 
p. 653 | 1876 A. s., A. Boeck, Skand. Arkt. Amphip., v.2 p.526 t.31 £.5 | 1891 A. s, 
G.O. Sars, Crust. Norway, v1 p.173 t.60 f.2 | 1893 A. aequicornis (part.), A. Della 
Valle in: F. Fl. Neapel, «.20 p. 478. 

Head truncate nearly transversely, but with upper corner rather more 
projecting than lower. Pleon segments 1— 3 slightly carinate, 34 with lower 
hind corners nearly quadrate; 4" deeply impressed in front and with high 
rounded carina behind. Corneal lenses small, distinet, lower pair removed 
from lower ecorners of head; pigment irregular, reddish, partly coated with chalky 
white. Antenna 1 in Q nearly half as long as body, pedunele just reaching 
beyond penultimate joint of peduncle of antenna 2, 29 joint not twice length 
of 1°t, flagellum 32-jointed, about 3 times as long as pedunele; antenna 2 in O 
1'/, length of antenna 1, ultimate and penultimate joints of pedunele equal. 
Gnathopod 1, 6% joint decidedly shorter than 5; gnathopod 2 much more 
slender than gnathopod 1. Peraeopods 1 and 2, 7b joint equal to 5! and 6th 
combined. Peraeopods 3 and 4 as usual very spinous. Peraeopod 5, 24 joint 
as long as rest of leg, expansion obliquely truncated, reaching to end of 
34 joint, which is much longer than the 4%; 6tk Jonger than 4 and 5th 
combined; 7tı ®/, length of 6%. Uropod 3 foliaceous, with short setae on 
the confronted margins in Q. Telson very narrow, without dorsal spinules, but 
with 3 marginal spinules near each apex. Semipellucid, light yellowish, 
with orange shadows and specks, peduncles of antennae with reddish tips. 
L. © 15 mm, 9 rather less. 

North-Sea, Skagerrak, North-Atlantie and Arctie Ocean (South- and West-Norway, 
northwards to Lofoten Isles). Depth 56-188 m. 


16. A. aequicornis Bruz. 1859 A.a., R.M. Bruzelius in: Svenska Ak. Handl., 
n.ser. v.ö nr.1 p.82 t.4 f.15 | 1891 A. aegvicornis, G.O. Sars, Crust. Norway, v.1 p.177 
t. 62 f. 1] 1893 A. a@quicornis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 478. 


Ampelisca 107 


Back not earinate, except slightly at pleon segment 4. Head truncate 
nearly transversely, but with upper eorner rather more projecting than lower. 
Side-plate 4 with hind and lower margins defined by an obtuse angle. 
Pleon segment 3, lower hind eorners quadrate. Corneal lenses small, distinct, 
lower pair removed from lower eorners of head, pigment well defined, reddish. 

_  Antenna 1 in 9 very little shorter than antenna 2, pedunele reaching beyond 
penultimate joint of pedunele of antenna 2, 24 joint twice as long as 1°, flagellum 
24-jointed, more than twice as long as pedunele; antenna 2 a little over half 
length of body, ultimate joint of peduncle longer than penultimate. Gnatho- 
pod 1, 6th joint shorter than 5t!k; gnathopod 2 much more slender than 
-  gnmathopod 1. Peraeopods 1 and 2, 7th joint scarcely equal to StR and 6th 
combined. Peraeopods 3 and 4 unusually short and robust. Peraeopod 5, 
24 joint longer than rest of leg, expansion broad, obtusely truncate, not 
reaching end of 34 joint, which is much longer than the 4, 6 shorter 
than 4! and 5t" combined, 7 broadly lanceolate, more than half length 
of 6th, Uropod 3, rami foliaceous, fringed with spinules. Telson oblong, 
a little tapering distally, with 2 pairs of dorsal spinules and 1 Ber at the 
blunted apiees. L. © 11 mm. 


North-Sea, Skagerrak and North-Atlantie (South- and West-Norway, northwards 
to Lofoten Isles, Bohuslän, British Isles). 


17. A. serraticaudata Chevreux 1888 A.s., A. serraticandata (laps.), Chevreux 
in: ©.-R. Ass. Frane., Sess. 17 v.2 p.349 t.6 f.3—9 | 1893 A. rubella (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p. 482. 


Head transversely truncate. Pleon segments 1—3 with postero-lateral 
angles acute, slightly produced, segment 4 without any of the usual gibbosity. 
Eyes figured as having small corneal lenses. Antenna 1 in oO little shorter 
than antenna 2, about half length of the body, peduncle reaching beyond 
penultimate joint of peduncle of antenna 2, 2% joint figured as not longer than 
1°, flagellum more than twice as long as peduncle; ultimate joint of peduncle 
of antenna 2 figured as longer than penultimate. Gmathopod 1, 6 joint sub- 
equal in length to 5t". Peraeopods 1 and 2, 7% joint much longer than 5% 
and 6!" combined. Peraeopods 3 and 4 short and robust. Peraeopod 5, 24 joint 
longer than rest of leg, expansion very obliquely truncate, reaching end of 
34 joint, which is longer than the 4; 6th joint not as long as 4 and 
5th combined; 7* very short and broad. Uropod 3, rami broad, with 
plumose setae on the confronted margins, outer ramus eurved at the apex, 

 serrate in the upper part. Telson long, very deeply cleit, with a long 
spinule at each apex. L. oO 5'5 mm. 


Mediterranean (Üherchell [Algeria]). 


18. A. diadema (A. Costa) 1855 Araneops d., A. Costa in: Rend. Soc. Borbon, 

nm. ser. .2 p.171 | 1867 Ampelisca d., A. Costa in: Annuario-Mus. Napoli, v.4 p.45 | 

1893 A.d. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.479 t.4 f.2; t.37 f.19, 20, 

22--28, 30-38; 1.38 f.2,7,8, 11,12, 14, 15; t.40 £.39, 40; t.41 f.23; t.44 f.4, 8,9, 11; 

t.45 £.17.18; 1.46 4-6; 1.47 f.29; t.48 f.19 | 1862 A. gaimardü (part.), Bate, Cat. 

Amphip. Brit. Mus., p.91 | 1871 A. assimilis, A. Boeck in: Forh. Selsk. Christian., 1870 
p.222 | 1891 A.a., G. ©. Sars, Crust. Norway, ®.1 p.168 t.58 f.2. 


Head obliquely truncated. Ventral surface of peraeon segments 5 
and 6 each carrying a backward directed hook, segment 7 with 2 unequal 
hooks directed forward. Pleon segment 3 with postero-lateral angles rounded, 

" segment 4 with slight anterior depression and earina barely indieated (rather 
high and evenly rounded, Boeck, Sars). Corneal lenses 4, lower pair at 


ea Sa a A re  F a P ? RE - 


108 Ampelisca 


lower eorners of head. Antenna 1 in 9 a little longer than peduncle of antenna 2, 
24 joint of pedunele not much longer than 1°, flagellum 10-jointed, about 
twice as long as peduncle; ultimate joint of peduncle of antenna 2 in d much, 
in © a little longer than penultimate, flagellum in Q 20-jointed, 1'/, length of 
peduncle. Peraeopods 1 and 2, 7*% joint much longer (shorter, Boeck) than 
5th and 6 combined. Peraeopod 5, 24 joint longer than rest of leg, not 
reaching end of 34, expansion obliquely rounded, 34 joint longer than 
4th, 6th Jonger than 4 and 5tk combined, 7% almost as long as 6, 
Uropod 3 with rami broad, carrying some feathered setae on the confronted 
edges. Telson long oval, eleft almost to the base, without dorsal spinules, 
but with some setules on the margins. Colour greyish, passing into 
yellow-brown on the sides, with red or violet on sides of pleon and legs. 
L. 7”—12 mm. 


Mediterranean; North-Atlantie, North-Sea and Skagerrak (West- and South- 
Norway, Bohuslän). 


19. A. acinaces Stebb. 1888 A.a., T. Stebbing in: Rep. Voy. Challenger, v.29 
p. 1036 t. 101, 102 | 1893 A. a., A. Della Valle in: F. Fl. Neapel, v.20 p. 476. 


Head transversely truncate. Side-plates 1 and 2 minutely toothed at lower 
hind corner, 1° distally much widened, 4b with lower and hind margins 
forming a very obtuse rounded angle (Fig. 25). Corneal lenses 4, the lower 
pair behind the obtusely projecting lower | 
eorners of the head. Antenna 1 in O not 
nearly reaching end of peduncle of antenna 2, 
24 joint about twice length of 1%, flagellum 
10-jointed, longer than peduncle; antenna 2 
in © as long as the body, ultimate joint 
of pedunele rather shorter than penultimate, 
which is longer than whole peduncle of an- 
tenna 1, flagellum 34-jointed, longer than 
peduncle. Mandibular palp with 24 joint 
moderately broad, 3% much shorter and 


Fig. 25. A.acinaces. Fig. 26. A. acinaces. 
Lateral view. Peraeopod 5. 


narrower. Maxilla 1 with 2 small setae on inner plate. Peraeopods 1 and 2, 
7% joint much longer than 5! and 6! combined. Peraeopod 5 (Fig. 26), 
24 joint with the expansion broad, almost transversely truncate, not reaching 
end of 34 joint, which is longer than 4th; 5tk joint a little longer than the 
4, each of them being lobed in front but not deeply; 6 nearly as long 
as 3 preceding joints combined; 7! narrowly lanceolate, about ®/, length - 
of 6%, Uropod 3, rami lanceolate, furnished with spines and setules. Telson 


2.20 p.479. 


Ampelisca 109 


distally tapering, with evenly curved margins, within which are planted 5 pairs 
of setules; a pair of setules adjoin the moderately acute apices. L. 21 mm. 
Port Jackson [East-Australia]. Depth 63 m. 


20. A.spinimana Ühevreux 1887 Amplisca (laps.) s., Chevreux in: Bull. Soe. 


En zool. France, v.12 p.574 | 1893 Ampelisca diadema (part.), A. Della Valle in: F. Fl, 


Neapel, v.20 p.479. 
Head obliquely truncate. Pleon segment 3 with postero-lateral angles 


slightly produced, almost quadrate; segment 4 slightly carinate in Q, deeply 


impressed and more strongly carinate in d. Eyes normal. Antenna 1 in Oo 
extremely short, 1° joint searcely longer than broad, 24 1?/, length of 1%, 
flagellum 6-jointed. Antenna 2 in Q scarcely '/, length of body, ultimate and 


‚penultimate joints of pedunele equal, flagellum 11-jointed. Antenna 2 in d much 


longer than the body. Gnathopod 1, 6 joint as long as 5tt, armed with 
long spines and setae on the concave palm. Peraeopods 1 and 2, 7! joint 
longer than 5!" and 6% combined. Peraeopod 5, 24 joint not quite reaching 
end of 34, which is armed with 4 spines on the front; 7th joint as long 
as 6%, Uropod 3 in © with long smooth rami ending in a little spine, the 
rami in © setose on the confronted edges. Telson cleft almost to the base, 
with 4 spines at the extremity. Colour uniform pale rose. L. 7 mm. 


North-Atlantie (Cape Finisterre, depth 510 m; Croisie, depth 15—20 m). 


21. A. compacta Norm. 1882 A. c. A. M. Norman in: P. R. Soe. Edinb., 
v.11 p. 688. ’ 


Body rounded, compaet. Pleon not carinate, segment 3 with postero-lateral 
angles acute, not much produced nor upturned, segment 4 with slight saddle- 
shaped depression. Eyes apparently‘ wanting. Antenna 1 longer than 
peduncle of antenna 2, flagellum 10-jointed; antenna 2 much longer than 
antenna 1, ultimate and penultimate joints of peduncle subequal. Peraeopods 1 
and 2, 7 joint subequal to 5!" and 6" combined. Peraeopod 5, 24 joint reaching 
end of 34, expansion transversely truncate, lower margin slightly concave(?), 
34 joint much longer than 4*h, Gt" not quite equal to At" and 5 combined, 
7tı half length of 6%. Uropod 3 with the rami sparingly ciliated. Telson 
deeply eleft. L. about 8 mm. 


North-Atlantic. Depth 968 m. 


22. A.typica (Bate) 1856 Tetromalus typicus, Bate in: Rep. Brit. Ass., Meet. 25 
p-58 t.17 f.8, DA | 1857 T.t., Bate in: Ann. nat. Hist., ser.2 ».19 p.139 | 1871 


 Ampelisca typica, A. Boeck in: Forh. Selsk. Christian., 1870 p.222 | 1891 A.t., G.O. 
Sars, Crust. Norway, o.1 p.165 t.57 | ?1859 A. carinata, R.M. Bruzelius in: Svenska 


Ak. Handl., n. ser. 0.3 nr.1 p.87 t.4 f.16 | 1862 A. gaimardi (part.), Bate, Cat. Amphip. 
Brit. Mus., p.91 t.15 f.1 | 1898 A. diadema (part.), A. Della Valle in: F. Fl. Neapel, 

Head truncate nearly transversely. Pleon segment 3 with postero- 
lateral eorners quadrate, segment 4 deeply impressed, especially in J, with 
rather high carina projeeting angularly. Corneal lenses distinet, lower pair 
a little removed from lower corners of head, pigment well defined, red with 
chalky white eoating. Antenna 1 in Q very small, much shorter than pedunele 
of antenna 2, 24 joint longer than 1, flagellum about 7-jointed, a. little 
longer than peduncle; antenna 1 in d reaching beyond peduncle of antenna 2. 
Antenna 2 in O scarcely more than half length of body, in J as long as 
body, ultimate joint of peduncle equal to penultimate in ©, longer than it in d. 


Gnathopod 1, 6! joint a little shorter than 5%. Peraeopods 1 and 2, 7'% joint 


longer than 5% and 6'% combined. as 24 joint longer than rest 
of leg, expansion obliquely truncated, reaching beyond 3@ joint, which is 
longer than 4%, 6% scarcely longer than 4% and 5% combined, 7% about 
as long as 6%. Uropod 3 in Q only fringed with simple setules, in d with 
plumose setae on the confronted edges. Telson about twice as long as broad, 
apically blunted, carrying several pairs of dersal spinules, and in © 5 pain 
of marginal setules. Whitish, pellueid, mottled with light yellowish and 
a few reddish patches, intestine orange-coloured, ova in pouch rose-coloured. 
L. 10 mm. r 
North-Atlantie, North-Sea and Skagerrak (British Isles, South- and ee 
up to Trondhjemsfjord); Kattegat. Depth 37—112 m. ; 
23. A. zamboangae Stebb. 1888 A. z.. T. Stebbing in: Rep. Voy. Ohaflinge 
e.29 p.1057 t.106 | 1893 4. diadema (part.), A. Della Valle in: F. Fl. Neapel, r.20 p.479_ 
Oo unkwown. — 9. Closely allied to A.typica (p. 109). Pleon segment 3 
with postero-lateral corners almost quadrate, slightly rounded, segment 4 
impressed and with a carina raised at the apex above the next segment. 
Corneal lenses 4, lower pair at the lower corners of the head. Antenna 1° 
reaching a little beyond peduncle of antenna 2, 24 joint not longer than 
1*, flagellum about 24-jointed, much longer than peduncle, antenna 2 as 
long as body, ultimate joint of pedunele much longer than penultimate, flagellum 
38-jointed, much longer than peduncle. Palp of mandible very large, 24 joint 
very broad, 3 much narrower but subequal in length. Gnathopod 1, 6% 
joint not much shorter than 5%. Peraeopods 1 and 2, 7% joint little longer 
than 52 and 6% combined. Peraeopod 5, 24 joint with expansion obliquely, 
but evenly rounded, reaching end of 34 jeint, wbich is much longer than 
the 4%, 6% not longer than the 4% and 5%: combined, 7% longer than 
the 6%, Tropod 3 with broad lanceolate rami serrate on tbe confronted margins 
and furnished with feathered setae and spines. Telson not twice as leng 
as broad, with one pair of dorsal spinules, cleft nearly */, length, the distal 
half triangularly tapering to the acute apices, each of which is notched for 
a setule. L. (in the position of usual curvature) 6 mm. 
Basilan Strait (Samboanga [Philippine Islands]). Surface. ’ 
24. A.tenuicornis Lilj. 1855 A. £., W. Liljeborg in: Öfv. Ak. Förh, «12 
p-123 | 1891 A.£., G.O.Sars, Crust. Norway, 2.1 p.167 £.58 £.1) 1862 A. laexigata 
(err., non W. Liljeborg 18551). Bate, Cat. Amphip. Brit. Mus., p. 96 | 1893 A. diadema 
(part.), A. Della Valle in: F. Fi. Neapel. e.20 p.479. 
Head strongly eurved anteriorly and obliquely truncate. Pleon segment 3 
with postero-lateral corners quadrate, sharpened in ©, in JS more obtuse; 
segment 4 slightly impressed in >, with very low and scarcely projecting 
carına, in Ö deeply impressed, with distinet though rounded carina. Corneal 
lenses distinet, lower pair a litile removed from lower corners of head, 
pigment irregular, bright red. Antenna 1 in O not reaching end of peduncle of 
antenna 2, 24 joint about twice as long as 1, flagellum about 11-joöintel, 
nearly twice as long as peduncle; antenna 2 in Onearly as long as body, ultimate 
and penultimate jeints of peduncle subequal. Antennae in d as in A.typia 
(p-109). Peraeopods 1 and 2, 7% joint subequal to 5'# and 6% combined. 
Peraeopod 5, 24 joint scarcely longer than rest of leg, expansion nearly = 
transversely truneate, not reaching beyond 3@ joint, which is longer than 3 
4%, 6% joint longer than 4 and 5% combined, 7% much shorter than 6. 
Uropod 3 in o with fewer marginal setules than in A. typica. Telson slighily ; 
constrieted near the base, without dorsal spinules, but with 3 pairs of anlage 


11r 


setules. Whitish, pellueid, with a conspicuous carmine patch on side-plate 1. 
L. scarcely more tban 8 mm. 
B Nortli-Atlantie, North-Sea and Skagerrak (South- and West-Norway up to- 
 Trondhjemsfjord, British Isles); Kattegat. Depth 19—188 m. 
25. A. sarsi Chevreux 1888 A. s., Chevreux in: C.-R. Ass. Frang,, Sess. 16- 
E: v.2 P- 666. 
ee: Closely allied to A. tenuicornis. Head transversely truncate, similar 
to A.typica (p. 109). Pleon segment 3 with lateral margin slightly prolonged 
_ backward, rounded, segment 4 scarcely carinate in ©, in JS impressed and 
_ with a high gibbous carina. Eyes not mentioned, but perhaps to be presumed, 
-  asthe head is compared to that of A.laerigata Liljeborg (p. 100). Antenna 1 in © 
- much shorter than peduncle of antenna 2. Antenna 2 in O ®/, length of 
body, in 9 longer than the body. Peraeopods 1 and 2, 7! joint as long as- 
5th and 6th combined. Peraeopod 5, 24 joint not reaching end_of 34, 4% 
joint not overlapping 5%. L. 7 mm. 
North-Atlantie (Croisie).. Depth 15—20 m. 


A.agassizi (Judd) 1896 Byblis a., S.D.Juddin: P.U.S. Mus.. ‚e18p. 599 f. 9-11. 
Near to A. diadema (p. 107). 


4 5 Narragansett Bay (Newport [Rhode I1sland]). 
; ‘A. daleyi Giles 1890 A.d., G.M.Giles in: J. Asiat. Soc. Bengal, 2.59 p.66 1.2.3. 
= Side-plate 5 having hind border of hind lobe notched. Antenna 2, last 3 joints 


* of peduncle very long and slender, antepenultimate longest, ultimate shortest. Peraeo- 
pods 3 and 4 with 7th joint (finger or spine?) remarkably long and slender. L. 4 mm.. 
Bay of Bengal (Seven Pagodas near Madras). Depth 13 m. 


A.japonica Bate 1862 4.j5., (Stimpson in MS.) Bate, Cat. Amphip. Brit. Mus., 
p.A4t15 £5. 
L. 9 mm. 
North-Pacifie (Japan). 
5. A. limicola (Stimps.) 1853 Pseudophthalmus l., P. limicolus, Stimpson in: 
- Smithson. Contr., 2.6 nr.5 p.57, 65 | 1862 Ampelisca limicola, Bate, Cat. Amphip. Brit. 
Mus., p.93 t.15 f.4. 
En: . But 1 clear eye-spot on each side of head. Peraeopod 5, 7th joint not lanceolate, 
- but stiliform and eurved. L. 15 mm. ; 
North-Atlantie (Charleston). Low water, in mud-holes. 
: A.nordmannii (M.-E.) 1840 Acanthonotus n.,. H. Milne Edwards, Hist. nat. 
Crust., v.3 p.24 | 1893 Ampelisca n., A. Della Valle in: F. Fl. Neapel, u. 20 p. 469. 
Black Sea (Crimea). 


"28 A. pelagiea (Stimps.) 1853 Pseudophthalmus pelagieus, Stimpson in: Smithson. 
 — Contr., ©.6 nr.5 p.57 | 1862 Ampelisca pelagica, Bate, Cat. Amphip. Brit. ER p- 9. 


Be: L. 10 mm. 

Be ° Long Island Sound and Häke Bay [North-Ameriea]. Depth 55—91 m. 

Bi ö 

Be A. pugetica Stimps. 1864 A. pugeticus, Stimpson in: P. Ac. Philad., p. 158. 
2 Puget Sound [western North-America]. Depth 18 m. 

# | 2. Gen. Byblis Boeck 

e- 1871 Byblis (Sp. un.: B. gaimardi), A. Boeck in: Forh. Selsk. Christian., 1870 
BE P-228 | 1891 B., G. O. Sars, Crust. Norway, v.1 p. 182. 

Be. Head with postero-antennal corners distinet. Side-plate 1 searcely 


deeper than 2, not concealing base of antenna 2; side-plate 4 evenly curved 


_ 


112 Byblis 


below the prominent posterior angle. Pleon segment 3, postero-lateral 
angles obtusely rounded. Corneal lenses 4 or none. Mandibular palp with 
24 joint narrow, 39 narrow and rather short. Peraeopods 3 and 4, 24 joint 
rather broad, its front edge moderately eurved, 5t% joint carrying several 
transverse rows of spines. Peraeopod 5 (Fig. 27), 24 joint strongly produced, 
the long hind margin nearly straight, inner and lower margins of the 
squarely descending lobe "carrying a dense fringe of plumose setae; 34 joint 
shorter than 4", 4th and 5th rather wide, 6!" sublinear, 7t spiniform. Uropod 3 
scarcely reaching beyond the others, rami narrowly lanceolate, not setose 
in ©, confronted edges more or less serrate. Telson short and broad, not 
very deeply eleft. Two pairs of hepato-pancreatie caeca. 


10 species. 


Synopsis of species: 
j Cleft of telson minute — 2. 
\ Cleft of telson not minute — 5. 


Antenna 2, ultimate joint of pedunele longer than 
| penubamale'. ta re an Bersihtope 7 DR 


Antenna 2, ultimate joint of peduncle not longer 
than penultimate — 3. 
3 j Corneal lenses wanting . » ... 2.0... 2. B.abysbl. - - ,:279.138 
\ Corneal lenses not wanting — 4. 


penultimate; peraeopods 1 and 2, 6th joint much 


Antenna 2, ultimate joint of peduncle shorter than 
4 IOnger Th DB 5 0 en ee 3. B. gaimardii . . p.113 


penultimate; peraeopods 1 and 2, 6th joint not 


| Antenna 2, ultimate joint of peduncle equal to 
much lougör than. BE... 5 un 4. B. longieornis. . p. 113 
Antenna 1 reaching well beyond peduncle of 
5 antenna 2 — 6. 
R en l reaching scarcely or not beyond 
peduncle of antenna 2 — 8. 
6 f Antenna 1 not very long...» 2.00... 5. B.affinis. . . . p.114 
ntenna 1 very long — 7. 
A l y long 
r f. Gorneal lenses absent. . .. . 2.2... 2... 6. B. crassicornis . p. 114 
Y. Oofneal ienses Present x”. 2.3... 0a 7. B. guernei . . . p.114 
8 f Corneal lenses absent..... 2... . 2... 8. B.serrata . . . p.114 
\ Corneal lenses present — 9. 


| Branchial vesicles and peraeopod 2 ofnormallength 9. B. kallarthra . . p.115 
9 2 Branchial vesieles and peraeopod 2 of abuormal 
| langt Sy ee NEN REN 10. B.lepta; . .. ..- p. 115 


1. B. erythrops O. Sars 1882 B.e., G. O. Sars in: Forh. Selsk. Christian., 
or.18 p.109 t.6 f£.8,3a 11891 B.e., G.O. Sars, Crust. Norway, v1 p.187 t.65 £.3| 
1893 Ampelisca gaimardi (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 472. 


Corneal lenses very small, lower pair removed from lower corners of 
front, pigment bright red. Antenna 1 little shorter than antenna 2, pedunele 
reaching considerably beyond end of penultimate joint of peduncle of antenna 2, 
flagellum in O 35-jointed, more than twice as long as peduncle; ultimate joint of 
peduncle ofantenna 2 notably longer than penultimate. Peraeopod 5, 24 joint 
produced below the 4fh, its front and lower edges in a continuous curve, 5tk joint 
as long as 3% and 4th combined, a little longer than the 6%, Uropod 3 with 
rami very slightly’ serrate on the confronted edges. Telson almost square, 


Es al ra a  E 
ri; at Sn De na Re 


113 


distal angles rounded, cleft short. Body pellucid, with dark violet intestine 
shining through the integument, sides mottled with white. L. © 8 mm, or 
 slightly more. 
Arctic Ocean and North-Atlantie (Magerö and Bejan [Norway]). Depth 150—188m, 
muddy bottom. 


; 2. B.abyssi O.Sars 1879 B.a., G.O.Sars in: Arch. Naturv. Kristian., v.4 
p-456 | 1885 B.a., G. O. Sars in: Norske Nordhavs-Exp., 0.6 Crust. 1 p.201 t.16 f.6 | 
1891 B.a., G. O. Sars, Crust. Norway, v.1 p.189 t.66 f.2 | 1893 Ampelisca gaimardii 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 472. 

Pe. Corneal lenses wanting. Antenna 1, peduncle not nearly reaching end of 

 penultimate joint of peduncle of antenna 2, flagellum in Q 28-jointed, twice as 
long as peduncle; ultimate joint of pedunele of antenna 2 notably shorter than 
penultimate, antenna 2 nearly twice as long as antenna 1. Peraeopod 5, 24 joint 
broad, reaching a little below 4%, front and lower edges in a continuous curve, 
but almost quadrate, 5!" joint as long as 34 and 4th combined, slightly 
longer than 6, 7tk joint very short. Uropod 3, inner margin of inner 
ramus serrate, that of outer ramus almost smooth. Telson almost quadrate, 

- but broader than long, slightly narrowed distally, distal angles rounded, cleft 

- nearly obsolete. Colour whitish, pellueid. L. © 12 mm. 

Br. Arctie Ocean and North-Atlantie (West- and Northwest-Norway). “ Depth 

659 —1186 m. ; 

3. B. gaimardii (Kroyer) 1846 Ampelisia (laps., corr.: Ampelisca) g., Kroyer 
in: Voy. Nord., Crust. t.23 f. 1a—y | 1871 Byblis gaimardi, A. Boeck in: Forh. Selsk. 
Christian., 1870 p.228 | 1891 B. gaimarditi, G. O. Sars, Crust. Norway, v.1 p.183 t.64| 
1893 Ampelisca g. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 472 t.57 f.39—41 | 
1896 Byblis serrata (err.?, non S. I. Smith 1873!), S.D. Judd in: P. U. S. Mus,, v. 18 
p- 596 f. 4—8. 

Corneal lenses large, lower pair occupying lower corners of front, 
- _ pigment brownish. Antenna 1, peduncle not reaching end of penultimate joint of 
-  _ peduncle of antenna 2, flagellum in O 20-jointed, twice as long as peduncle, 
ultimate joint of peduncle of antenna 2 shorter than penultimate. Peraeopods 1 

and 2 having 6! and 7% joints each much longer than tbe 5"; peraeopod 5 with 

24 joint produced below the 4, its front and lower edges defined by an obtuse 

-  angle, 5tk joint as long as 34 and 4! combined and rather longer than 

the 6th, Uropod 3 having the rami acute, with confronted edges serrate and 

a projecting corner near the base. Telson with nearly equal length and breadth, 

eleft very short. Colour whitish- with faint orange markings, front of head 

mottled with dark violet. L.9 15, J rather less (Sars), reaching 23 mm (Ohlin). 

Arctie Ocean, North-Atlantie and North-Sea (whole West-Norway); Christiania- 
fjord; Kattegat. Depth 37—150 m. 

4. B.longicornis O.Sars 1891 B.L., G.O.Sars, Crust. Norway, v.1 p.185 
1.65 £.1 | 1893 Ampelisca gaimardii (part.), A. Della Valle in: F, Fl, Neapel, v.20 
p. 922 | 1894 Byblis intermedius, T. Stebbing in: Bijdr. Dierk., v.17 p.18. 

Corneal lenses smaller than in B. gaimardii, lower pair removed from lower 
corners of front, pigment light brown. Antenna 1, peduncle usually reaching 
end of penultimate joint of peduncle of antenna 2, flagellum in 9 27—35-jointed, 
twice aslong aspeduncle; ultimate and penultimate joints of peduncle of antenna 2 
- „subequal; both pairs longer than in B. gaimardii. Peraeopods 1 and 2 having 6 
E joint not much longer than 5'%; peraeopod 5 with 24 joint not produced 

below the 4, its front and lower edges in a continuous curve, 5!" joint 

scarcely as long as 34 and 4 combined and shorter than the 6%. Uropod 3 

with rami acute and confronted edges serrate, but without projecting corner near 
Das Tierreich. 21. Lief.: T.R.R. Stebhing, Amphipoda I. 8 


a ee a ie > 
. \ FRONT SE N 5% 


114 Byblis 


the base. Telson broader than long, slightly tapering, eleft very short. Head 
not mottled. L. © 12 mm. 


Aretie Ocean (Lofoten Isles, Finmark, South-Spitzbergen, Barents Sea). 


5. B. affinis VO. Sars 1891 B.a., G.O. Sars, Crust. Norway, v.1 p.186 t.65 
f.2 | 1893 Ampelisca gaimardii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.907, 922. 


Corneal lenses smaller than in B. longieornis (p. 113), lower pair remote 
from lower corners of front, pigment dark brownish. Antenna 1, peduncle reaching 
end of penultimate joint of peduncle of antenna 2, flagellum in 9 24-jointed, 
twice aslong aspeduncle; ultimate and penultimate joints of peduncle of antenna 2 
subequal; both pairs shorter than in B: longicornis. Gmathopod 1 with 6th 
joint little shorter than 5%, a character which this species has in common 
only with B. serrata and B. guernei. Peraeopods 1 and 2 having 6th joint 
eonsiderably longer than 5t"; peraeopod 5 with 24 joint not produced below 
the 4h, front and lower edges in a continuous curve, but almost quadrate, 
. 5th joint as long as 34 and 4% combined, and rather longer than the 6", 
Uropod 3 lanceolate, with confronted edges slightly serrate. Telson very little 
broader than long, very slightly tapering to the truncate distal margin, cleft 
extending almost to the middle. Body pellucid with reddish intestine, head 
dotted with whitish and brownish pigment not ramified, orange patches on 
22 joint in peraeopods 3—5 and on pleon. L. © 9 mm. 

Trondhjemsfjord. Depth 75—113 m. 


6. B. crassicornis Metzg. 1875 B.c., Aug. Metzger in: Jahresber. Comm. 
D. Meere, v.2/3 p.297 t.6 f.9, 9a,b | 1891 B. c., G. O. Sars, Crust. Norway, v.1 p. 188 
t.66 f.1 | 1893 Ampelisca gaimardü (part.), A. Della Valle in: F. Fl. Neapel, 0.20 p.472. 


Corneal lenses wanting. Antenna 1, peduncle reaching eonsiderably beyond 
penultimate joint of peduncle of antenna 2, flagellum in O9 20-jointed, scarcely 
twice as long as peduncle; ultimate joint of peduncle of antenna 2 a little shorter 
than penultimate, antenna 2 little longer than antenna 1. Peraeopod 5 with 
24 joint less expanded than usual, scarcely reaching beyond the 4" joint, 
front and lower margins in a continuous curve, 5t% joint little longer than 4", 
not longer than 6% Uropod 3, rami not serrate on the confronted edges. 
Telson fully as long as broad, much tapering, cleft nearly reaching the 
middle. Body pellueid, nearly colourless. L. 9 7 mm. 


Bukkenfjord (Jaederen, Hvitingsö), Christianiafjord. Depth 188—282 m. 


7. B. guernei Ühevreux 1887 B. g., Chevreux in: Bull. Soc. zool. France, 
v.12 p. 576. 


Corneal lenses very distinet. Antenna 1 more than °/, length of the body; 
antenna 2 as long as the body, ultimate joint of peduncle a little shorter 
than penultimate. Gnathopod 1, 5tt joint a little longer than 6", Peraeopod 5 
having the 24 joint much expanded and reaching to the end of the 5t" joint. 
Telson a little broader than long, distally truncate, cleft extending to the 
middle. L.5 mm. 


North-Atlantie (Cape Finisterre). Depth 510 m. 


8. B. serrata S. I. Sm. 1873 B. s., (S.I. Smith in:) A. E. Verrill in: Rep. 
U. S. Fish Comm., v.1 p.561 | 1879 Ampelisca minuticornis, G.O.Sars in: Arch. Naturv. 
Kristian., v.4 p.455 | 1885 A. m., G.O. Sars in: Norske Nordhavs-Exp., 0.6 Crust. I 
p-198 t.16 f.5a—o | 1893 A. m., A. Della Valle in: F. Fl. Neapel, ©.20 p.477 | 1891 
Byblis m., 6. O. Sars, Crust. Norway, v.1 p. 190 t. 66 £.3. 


Byblis 115 


Lower margin of side-plate 1 (Sars), or side-plate 1 and 2 (Smith) serrate 
between marginal setae. Corneal lenses wanting (Sars, not mentioned by 
Smith). Antenna 1 scarcely reaching beyond penultimate joint of peduncle of 
antenna 2, flagellum in © 6-jointed, shorter than peduncle; antenna 2 little more 
than half as long as the body, ultimate joint of pedunele shorter than penultimate. 
Gnathopod 1 with 5% joint scarcely if at all longer than 6*" (Smith and Sars 1885, 
but considerably longer in Sars’s figure). Peraeopod 5, 24 joint much expanded 
and reaching to the end of the 5% joint, anterior corner rounded off (Sars), 
anterior and inferior margins evenly arcuated (Smith), 5!" joint about as 
long as 34 and 4 combined and about as long as the 6. Uropod 3 with 
 eonfronted edges not having any distinet serration. Telson subquadrate, about 
as long as broad, eonverging (rapidly, Smith) to distal margin, eleft extending 
about.to the middle (Sars), rather more than half its length (Smith and Sars 1885). 
Body highly pellucid, and nearly colourless (Sars), specked and mottled on 
‚side-plates; 24 joint of peraeopods 3—5, and sides of pleon with erowded points 

of dark pigment (Smith). L. © 8—12 mm. 

Aretie Ocean and North-Atlantie (Spitzbergen, West- and North-Norway, depth 
659-—1193 m; off Vineyard Sound and Buzzard Bay, deep water). 

9. B. kallarthra Stebb. 1886 B. kallarthrus, T. Stebbing in: P. zool. Soe. 
London, p.4 | 1887 B.k., T. Stebbing in: Tr. zool. Soc. London, v.12vı p.199 t.38 | 
1893 Ampelisca k., A. Della Valle in: F. Fl. Neapel, v.20 p. 476. 

Lower margins of side-plates 1 and 2 serrate, side-plate 4 produced back- 
wards with sinuate lower margin, not observed in any other species. The 
4 corneal lenses surrounded with dark pigment. 
Antenna 1 scarcely more than reaching end of pen- 
ultimate joint of peduncle of antenna 2, flagellum in 
o 11-jointed, a little longer than peduncle; ultimate 
joint of peduncle of antenna 2 rather shorter than 
penultimate, antenna 2 not quite °/, length of body. 
Gnathopod 1, 5% joint much longer than 6%", Peraeo- 
pods 1 and 2, 6% joint considerably longer than 5t%; 
peraeopod 5 (Fig. 27) with 24 joint produced fully to 
the end of the 5tk, the front and lower margins 
forming a gently continuous curve, 5% joint considerably 
longer than 34 and 4! combined and much longer 
than 6%, Uropod 3 with confronted margins of rami 
serrate and angled near the base. Telson slightiy 
longer than broad, a little rounded, cleft extending Fig. 27. 

a little beyond the middle. Branchial vesicles with B. kallarthra. 
secondary lamellae on both sides. L. © 10 mm. Bey serke 

Singapore Strait. 

10. B. lepta (Giles) 1888 Ampelisca l., G. M. Giles in: J. Asiat. Soc. Bengal, 
v.57 p.223 t.8,9 | 1893 A. 1, A. Della Valle in: F. Fl. Neapel, v.20 p. 89. 

The 4 corneal lenses surrounded with dark brown pigment. Antenna 1 
reaching a little beyond peduncle of antenna 2, flagellum with 10 very slender 
joints; antenna 2, °”/, length of body, ultimate joint of peduncle a little shorter 
than penultimate, flagellum 14- or 15-jointed. Peraeopod 2 unusually elongate. 
Peraeopod 5, 24 joint descending below the 4%, Uropod 3, rami apparently 
serrate on confronted margins and angled near the base. Telson deeply cleft, 
semilunar. Colour ivory white. Branchial vesicles of great length, with 

- conspicuous accessory laminae on each surface. L. about 6 mm. 
Head of Bay of Bengal. Depth 195 m. 


7th joint 


8* 


116 Haploops 


3. Gen. Haploops Lilj. 


1855 Haploops, W. Liljeborg in: Öfv. Ak. Förh., v.12 p.135 | 1891 H., 6.0. 
Sars, Crust. Norway, v.1 p.191 | 1893 H., A. Della Valle in: F. Fl. Neapel, v.20 p.111, 
126, 485 | 1894 H., T. Stebbing in: Bijdr. Dierk., ©.17 p.18. 


Head with postero-antennal corners rounded off. Side-plate 1 deeper 
than next pair, partly concealing base of antenna 2; 4 evenly curved 
below the prominent posterior angle. Eyes less perfect than in the other 
genera, corneal lenses 4 or 2 or none. Mandibular palp (Fig. 28) setose, 
with elongate 39 joint. Peraeopods 3 and 4, 24 joint rather broad, its front 
edge moderately curved, dt carrying several transverse rows of spines. 
Peraeopod 5 (Fig. 29), 24 joint squarely dilated above, so that the front 
and hind margin are subparallel, while the descending lobe is narrowly or 
broadly rounded, its margin fringed with setae, of which there are many 
also on the hind margin and surface of the expansion; 34 joint shorter than Ah, 
4th and Stk hroad, 6% very narrow, 7% spiniform. Uropod 3 reaching conside- 
rably beyond the others, rami foliaceous, setose at the edges, inner margin of 
inner ramus armed with strong spines. Telson of moderate size, usually 
deeply cleft. One pair of hepato-pancreatie caeca (Della Valle). 


5 species. 
Synopsis of species: 


| Body smooth or nearly so, eorneal lenses present — 2. 
1 2 Body with dorsal fascieles of setae, corneal lenses _ 
| absent — 4. 


Antenna 1 very long; uropod 1, inner ramus very 


BHO A le We en 1. H.dellavallei . p.116 
] Antenna 1 not very long; uropod 1, inner ramus 
not very short — 3. 


2 


Corneal lenses 2; uropod 3 in 2, rami subequal, 
3 | NET N ee ae ia er er abloole > RB 
Corneal lenses 4; uropod 3 in 2, rami unequal, 
BOB ne N 8. Fu 1soVis . 2... B. 4117 
4 f Telson cleft a little beyond the middle ... . . 4; H.inetosa : . ; ». PT 
\ Telson cleft nearly to the base . . . ........ 5. H. robusta . . . p.118 


1. H. dellavallei Stebb.*) 1893 H.tubicola (err., non W. Liljeborg 1855!), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 486 t.3 £.2; t.87 £. 1-18. 


Corneal lenses 4, colour of eyes erimson, standing out on a ground 
of bright yellow. Antenna 1 much longer than the body, flagellum 7 times 
as long as peduncle, of about 30 joints with very long setae. Antenna 2 
subequal to antenna 1, ultimate joint of peduncle a little longer than penultimate, 
flagellum as in antenna 1. Peraeopod 5, 24 joint rather narrow, broadest 
at base, hind margin concave, lower lobe narrow, scarcely reaching beyond 
the short 34, 4th and 5t" equal, 5tk with both margins crenate, 6 and Th 
very small. Uropod 1 perfeetly smooth, inner ramus spine-like, "/, length 
of outer; uropod 2 furnished with spines; uropod 3 with the rami subequal 
and foliaceous, armed with spinules and setules. Telson heart-shaped, cleft 
almost to the base, with a setule on each side of the almost acute apex. 
Colour pearl-grey, changing into yellow-brown on the sides; a large erimson 
blotch occupies part of the head and peraeon segment 1. L. 8 mm. 

Gulf of Naples. Depth 20-40 m. 


*) Spec.nov. After Antonio Della Valle. 


a len See 


vis 
ter 


ea" Sn. 
LEER VON a 


Haploops 117 

2. H.tubicola Lilj. 1852 Ampelisca eschrichti? (err., non A. eschrichtii Kroyer 
18421), W. Liljeborg i in: Öfv. Ak. Förh., v.9 p.6 | 1855 Haploops tubicola + H. carinata, 
W. Liljeborg in: Öfv. Ak. Förh., v.12 p.135, 136 | 1880 H.t., Stuxberg in: Bih. Svenska 
Ak., 0.5 nr.22 p.65 | 1891 H.t., G.0. Sars, Orust. Norway, v.1 p.192 t.67 | 1894 H.t., 
7; Stebbing in: Bijdr. Dierk., v.17 p.19. 


Pleon in carinate. Corneal lenses 2, ent bright reddish. Antenna 1 
about half length of body, 24 joint much longer than 1°, flagellum 2'/, 
times as long as pedunele, with about 23 joints carrying setae. Antenna 2 


- subequal to antenna 1, ultimate and penultimate joints of peduncle subequal. 


Peraeopod 5, 24 joint rather narrow, broadest at base, hind margin concave, 
lower lobe narrow, scarcely reaching beyond 34 joint, 4 longer than 5tk, 
6 and 7b very small. Uropod 1, inner ramus °/, length of outer, 
carrying spinules; uropod 3, rami subequal and foliaceous, fringed in J with 
long ciliated setae, in Q with shorter setae, the outer ramus having also 
4 spinules. Telson a little longer than broad, cleft extending far beyond 
the middle, apices somewhat rounded. Body whitish, pellueid, with dark 
violet intestine. L. 0 11, 90 10—22 mm. 

Arctic Ocean, North-Atlantie, North-Sea, Skagerrak, Kattegat and Baltie (Nor- 
wegian, Danish, Dutch, French and British coasts). 


3. H.laevis Hock ?1866 H. tubicola (part.), Go&s in: Öfv. Ak. Förh., v.22 p.528 | 
1895 H. t. {par ), A. Della Valle in: F. Fl. Neapel, v.20 p.486 | 1882 H. laevis, Hock 
in: Niederl. Arch. Zool., suppl. 1 nr.7 p.61 t.3 f£.31 | 1894 

H.l!., T. Stebbing in: Bidr. Dierk., v.17 p.19 t.3. 
Several segments of peraeon with a patch of fine 
down on tbe back. Corneal lenses 4. Antenna 1 
about half length of body, 1° joint nearly as long 
as 24, flagellum in Q 30- 
jointed, scarcely twice as long 
as peduncle; antenna 2 rather 
longer than antenna 1, ulti- 
mate joint of peduncle a 
little longer than penultimate. 
Gnathopod 1, 6! joint distally 
rather widened instead of 
narrowed as is more usual. 
Peraeopod 5 (Fig. 29) nearly 
as in H. tubicola, but the 
little 6" and 7% joints more 
elongate. Uropod 1, inner 
ramus ?/, length of outer, both 
SS‘  smooth; uropod 2 furnished 
N with spines; uropod 3 in © 
with rami not longer or 
broader than those ofuropod 2, 
Fig.28. H.laevis. setose, the inner and shorter 
rege branch earrying also 2 spines. 
Telson scarcely longer than broad, cleft fully */, length, sides slightly converging, 

apices broadly rounded. L. reaching 19 mm. 

Arctie Ocean (between lat. 690 and 76°N., long. 36° and 65° E.). Depth 45—276 m. 
4. H.setosa Boeck 1871 H.s., A. Boeck in: Forh. Selsk. Christian., 1870 p.228 | 


1876 H.s., A. Boeck, Skand. Arkt. Amphip., v.2 p.541 t.80 £.7 | 1891 H.s., G. O. Sars, 
Crust. Norway, v.1 p.194 t.68 f.1 | 1893 H.s., A. Della Valle in: F. Fl. Neapel, v.20 p.489. 


Fig. 29. H.laevis. 
Peraeopod 5. 


118 Haploops, Haustoriidae 


Fascicles of long slender setae rising from dorsal end of peraeon 
segments 5—7 and pleon segments 1—3. Head with lower corners distinetly 
angular. Postero-lateral angles of 34 pleon segment very slightly produced. 
Patches of reddish pigment in the position of the absent corneal lenses. 
Antenna 1 more than half as long as body, 24 joint of pedunele much 
longer than 1°, flagellum 24-jointed, twice as long as peduncle; antenna 2 
subequal to antenna 1, ultimate and penultimate joints of peduncle subequal. 
Gnathopod 1, 6" joint distally narrow. Peraeopod 5, 24 joint broad, hind 
margin straight, lower lobe broad, descending much below the 34, the 
expansion on surface and margin being densely setose, 4!" and 5th joints 
subequal, 5tl not equalling in length the narrow 6!" and 7" joints combined. 
Uropod 1 slightly armed, inner ramus °/, length of outer; uropod 2 with rami 
much shorter than those of uropod 3, which are foliaceous and setose, the inner 
and shorter carryıng 2 spines. Telson about as long as broad, cleft scarcely - 
beyond the middle, tapering to an almost acute apex. Colour greyish white, 
with brownish intestine. L. © 13 mm. 

Aretie Ocean; North-Atlantie, North-Sea and Skagerrak (South- and West-Norway). 


5. H. robusta O. Sars 1891 H.r., G. O. Sars, Crust. Norway, v.1 p.195 t. 68 
f.2|1893 H.r., H.setosa?, A. Della Valle in: F. Fl.:Neapel, v.20 p.907, 982 | 1894 
H.r., T. Stebbing in: Bijdr. Dierk., 0.17 p. 18. 


Perhaps not distinet from H.setosa. Fascicles of setae as in H. setosa. 
Head with lower angles more or less rounded. Postero-lateral angles of 
3% pleon segment not produced. Cormeal lenses wanting. Antenna 1 in 
the type speeimen less than half length of body, with 24 joint of peduncle 
little longer than 1°, but sometimes little differing from the proportions‘ 
in H. setosa; flagellum sometimes consisting of 33 joints; antenna 2, flagellum 
sometimes of 30 joints. Peraeopod 5 as in H. setosa, but 4 and 5tk joints 
rather longer in proportion to breadth. Uropod 3 with 3 spines on the 
inner ramus. Telson rather longer than broad, cleft almost to the base. 
L. reaching 22:5 mm. . 

Arctic Ocean (Finmark, and between lat. 720 and 76° N., long. 16° and 54° E.). 


4. Fam. Haustoriidae 


1882 Pontoporeiidae, G. O. Sars in: Forh. Selsk. Christian., nr. 18 p.22 | 1888 
P., T. Stebbing in: Rep. Voy. Challenger, v.29 p.804 | 1891 P., G. ©. Sars, Crust. 
Norway, v.1p.121. 

Head ‚seldom rostrate. Side-plates of moderate size, generally fringed 
with setae, side-plate 5 bilobed. Antenna 1 (Fig. 30, 32) usually shorter 
than antenna 2 (Fig. 31, 33), with accessory flagellum, joints of peduncle 
sharply defined. Epistome not projeeting. Upper lip with rounded margin, 
lower lip quadrilobate. Mandible with dentate eutting edge, accessory plate, 
prominent and large molar, palp 3-jointed. .Maxillae 1 and 2 (Fig. 34) and 
maxillipeds usually but not always normal. Gnathopods 1 and 2 seldom powerful, 
weakly subchelate or chelate.. Peraeopods 3—5 (Fig. 35, 36) varied, often 
adapted for burrowing. Branchial vesicles simple. Pleopods as a rule well 
developed, especially ind. Uropods 1—3 biramous, uropod 3 unlike uropods 1 
and 2. Telson flattened, more or less deeply cleft. 

Marine; also in brackish and fresh water. 

8 genera, 21 accepted, 5 doubtful species. 


inner plate with many setae, 29 joint of palp with 


A 
Bi 
pi 
. 

. 

n 

L 
u 
; 

3 


Haustoriidae, Bathyporeia 119 


. Synopsis of the genera: 


= Antenna 1 (Fig. 30) geniculate between Ist 
a er 1. Gen. Bathyporeia . . p.119 
Antenna 1 (Fig. 31, 32). not geniculate — 2. - 
Peraeopods 4 (Fig. 35) and 5 with 4th and 5th 
joints greatly expanded — 3. 
Peraeopods 4 and 5 (Fig. 36) with some or all 
of those joints little expanded — 4. 
f Gnathopods 1 and 2 with 3d joint elongate 2. Gen. Platyischnopus . p. 122 
\ Gnathopods 1 and 2 with 34 joint short . Gen. Haustorius . . . p.124 
f One of the side-plates abnormally small . . 4. Gen. Cardenio . . . . p.125 
\ None of the side-plates abnormally small — 5. 
Ps Side-plates 1—4 obtusely pointed below . . 5. Gen. Priseillina . . . p.126 
? | Side-plates 1—4 broadly rounded below — 6. 
j Gnathopod 1, 5th joint short and broad . . 6. Gen. Pontoporeia. . . p.127 
\ Gnathopod 1, th joint long and narrow — 7. 
| Peraeopod 4, 4th joint not expanded; peraeo- 
7 


@w 


pod 5, 2d joint not greatly produced 


downward a N RER 7. Gen. Urothoe. ... . p. 128 
| Peraeopod 4, 4th joint RR expanded; peraeo- 
pod 5, 2d joint greatly produced downward 8. Gen. Urothoides . . . p.132 


1. Gen. Bathyporeia Lindstr. 


1855 Bathyporeia (Sp. un.: B. pilosa). Lindström in: Öfv. Ak. Förh.; «.12 p.59| 
1857 Bathyporea (laps.), Bate in: Ann. nat. Hist., ser.2 v.19 p.271 | 1891 Bathyporeia, 
G.O. Sars, Crust. Norway, v.1 p.127 | 1893 B., A. Della Valle in: F. Fl. Neapel, v. 20 
p. 751 | 1856 Thersites. (nom. nud.), Bate in: Rep. Brit. Ass., Meet.25 p.59 | 1857 T. 
(non L. Pfeiffer 1855, Mollusca!), Bate in: Ann. nat. Hist.. ser.2 v.19 p. 146. 


Body eompressed. Head without rostrum. Side-plates not very large, 1° 
narrow, bent forward. Pleon segment 4 with 2 dorsal setules curving forward. 
Antenna 1 (Fig. 30) shorter than antenna 2, geniculate between the 1° and 
2 joint, 1° abouttwiceaslong as 24 and 3% combined, accessory flagellum small, 
2-jointed, flagellum with calceoli on upper margin in d. Antenna 2, ultimate 
joint of pedunele shorter than penultimate, flagellum „same 
short in ©, long, with caleeoli, in . Mandible, 1 joint "7 
eutting plate narrowly produced, simple, few spines 


in spine-row, 39 joint of palp narrow, curved. Maxilla 1, Accessory 
agellum 


apex incurved, hairy. Maxillipeds, outer plates rather 

short, with strong spines on inner margin, 24 joint \ 

of palp large, hairy, strongly produced at inner apex, Fig. 80, 

34 narrow, incurved, 4!" small. Gnathopod 1, 6% joint B. guilliamsoniana. 
oval, shorter than 5th, scarcely subchelate, finger smalk Arne. N, 
Gnathopod 2, fringed with long setae, the 6th joint slenderly subfusiform, 
finger wanting. Peraeopods 1 and 2 short, with 4th joint rather stout.. Peraeo- _ 
pod 3 doubly genieulate in posture, 24 joint narrowest at the base, 4 
expanded, setose, 5th and 6 narrow, 7*Yh wanting. Peraeopod 4, 24 and 
4th -joints more expanded than in peraeopod 5, both pairs with finger rudi- 
mentary, and having terminal joints fringed with setae and groups of spines. 
Uropod 3, outer ramus long, 2-jointed, inner small, laminar. Telson cleft 
to base, carrying spines on truncate apices and outer lateral margins. 


5 species accepted, 1 doubtful. 


ea aa N re 


120 Bathyporeia 


Synopsis of accepted species: 


Pleon segment 3, postero-lateral angles produced 
| 0.2 Wolh: nee TR A en 1. B. guilliamsoniana . p.120 
: | Pleon segment 3, postero-lateral angles not 
produced to a tooth — 2. 
j 


Pleon segment 4 with dorsal spinules — 3. 


. | Pleon segment 4 without dorsal spinules — 4. 

J Pleon segment 4 with 1 pair of dorsal spinules 2. B. pelagiea ... . . p- 120 

\ Pleon segment 4 with 2 pairs of dorsal spinules 3. B.gracilis ..... p- 121 
Peraeopods 4 and 5, 2d joint less than half 

4 as long ‚as rest ot im. . 5.08 55 4. B. robertsoni .. . . . p.121 
Peraeopods 4 and 5, 2d joint more than half 

ds. long 98 rent Of Imb . ... ..2.000.5 D: 3. DHOBA 20% p- 121 


1. B. guilliamsoniana (Bate) 1856 Thersites guilliamsonia (nom. nud.),. Bate 
in: Rep. Brit. Ass., Meet. 25 p.59 | 1857 T. guilliamsoniana, Bate in: Ann. nat. Hist., 
ser.2 v.19 p. 146 | 1857 Bathyporea guilliamsonia, B. pilosa?, Bate in: Ann. nat. Hist., 
ser.2 v. 19 p. 271 | 1862 Bathyporeia p. (err.. non Lindström 1855!), Bate, Cat. 
Amphip. Brit. Mus., p.172 t.31 f.4 | 1891 B. norvegica, G. ©. Sars, Crust. Norway, v1 
p.128 t.43 | 1898 B.n., A. Della Valle in: F. Fl. Neapel, v.20 p.754 | 1893 B.n., 
T. Seott in: Rep. Fish. Board Seotl., v. 11 p. 213 t.5 £. 22. 


Back comparatively broad. Head scarcely as long as peraeon segments 1 
and 2 combined. Side-plate 1 acutely pointed, 24 and 39 with small tooth at 
hinder angle. Pleon segment 3 with postero-lateral angles forming a short 
but distinet tooth; segment 4 dorsally depressed deeply at base, with a pair 
of spinules behind the bent setules. Eyes in Q reniform, in S much longer, 
widening upward, dark red. Antenna 1 (Fig. 30), flagellum in o with 8, ind with 
13 joints, 24 joint of accessory flagellum !/, as long as the 1%, which has spinules 
on both edges. Antenna 2, tlagellum in O with 8 joints, shorter than last 2 of 
peduncle, in J slender, considerably longer than the body. Gnathopod 1, 
6 joint broadly oval, much shorter than 5tk., Peraeopod 3, 4% joint much 
expanded, setose, as long as 5!" and 6!" combined. Peraeopods 4 and 5, 24 joint 
about half as long as rest of limb. Uropod 3, 1° joint of outer ramus a 
little dilated distally, 24 about !/, as long, setose. on both margins. Each 
half of telson sublinear, with about 9 apical spines and 4 lateral. Body 
pellueid, nearly colourless.. L:Q 7, 0 8 mm. 

North-Atlantice and North-Sea (England, between tide-marks; Scotland; South- 
Norway, depth 4—11 m). i 


2. B. pelagica (Bate) 1856 Thersites p. (nom. nud.), Bate in: Rep. Brit. Ass., 
Meet.25 p.59 | 1857 T. p., Bate in: Ann. nat. Hist., ser.2 v.19 p.146 | 1862 Bathyporeia p., 
Bate, Cat. Amphip. Brit. Mus., p. 174 t.31 f.6 | 1891 B. p., G. O. Sars, Crust. Norway, 
v.1 p.129 t.44 f.1 | 1895 B.p., T. Scott in: Rep. Fish. Board Scotl., v. 11 p. 213 
t.5 f.23—25 | 1875 B. pilosa (part.), T. Stebbing in: Ann. nat. Hist., ser. 4 v.15 p.74 
t.3 | 1898 B.p. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 752 | 1877 B. tenuipes, 
Meinert in: Naturh. Tidsskr., ser. 3 v. 11 p. 201. 


More slender than the preceding species; head fully as long as peraeon 
segments 1 and 2. Side-plate 1 less narrowed in front, obtusely pointed, in 
24 and 34 tooth obsolete. Pleon segment 3, lateral angles rounded, without 
tooth; segment 4 with a like pair of spinules. Eyes in Q small, rounded oval, 
larger ind, bright red. Antenna 1, flagellum in 9 6-, in C 9-jointed; accessory 
flagellum, 24 joint nearly half as long as 1°, which has spinules on outer 
edge only. Antenna 2, flagellum in © with 7 joints, much shorter than last 2 of 


‘ 


DE I SE lesen Ann in nn alte SE Ze nn Re 


S 
E 
3 
=: 
R- 
B 
3 


Bathyporeia 121 


'pedunele, in S about as long as the body. Gmathopod 1, 6! joint oblong 


oval, somewhat shorter than 5%. Peraeopods less setose. Uropod 3, 1° joint 
of outer ramus scarcely dilated distally, 2% nearly half as long, and in O 
without lateral setae. Telson with about 6 apical spines and 2 lateral on 
each half. Body pellueid, nearly colourless. L. scarcely more than 5 mm. 


Aretie Ocean, North-Atlantie, North-Sea, Skagerrak and Kattegat (Scandinavia, 
France, Great Britain). 


3. B. gracilis 0. Sars 1891 B.g., G.O. Sars, Crust. Norway, v.1 p.132 t.45 


. £.1] 1893 B. pilosa (part.), A. Della Valle in: F. Fl. Neapel, 0.20 p. 752. 


Rather slender though not much compressed; head about as long as 
peraeon segments 1 and 2. Side-plate 1 rather narrow, obtusely pointed, 24 and 
(?) 3% with tooth. Pleon segment 3, angles rounded, without tooth; segment 4 
not deeply depressed and carrying 2 pairs of spinules. Eyes imperfectly 
developed, and not at all visible in spirit specimens. Antenna 1, flagellum 
in © with 6, in J with 8 joints; accessory flagellum, 24 joint scarcely more than 
!/, length of 1°, which has spinules only on outer edge. Antenna 2 in 9 twice as 
long as. antenna 1, flagellum slender, subequal to last 2 joints of peduncle, 
8-jointed ; in C scarcely longer than in 9 , flagellum with 13 joints, distinet ealceoli 
on the first 5. Gnathopod 1, 6*% joint regularly oval, much shorter than 5, 
Peraeopods 3—5 much more slender than in any of the other species known, 
4h joint little expanded in peraeopod 3 and scarcely as long as 5 and 
6 combined; 5tk and 6!k very elongate and narrow in peraeopods 4 and 5. 
Uropod, 3, 24 joint of outer ramus about "/, length of 1°, both margins 
smooth. Each half of telson rather narrow, with 4 apical spines and 
2 lateral. IL. about 6 mm. 


North-Atlantie (West-Norway). From rather deep water. 


4. B.robertsoni Bate 1862 B.r., Bate, Cat. Amphip. Brit. Mus., p.173 t.31f.5 | 
1891 B. robertsoni, G. O. Sars, Örust. Norway, v.1 p.131 t.44 f.2 | 1893 B. robertsoni, 
T. Seott in: Rep. Fish. Board Seotl., v. 11 p.213 t.5 f.26—29 | 1875 B. pilosa (part.), 
T. Stebbing in: Ann. nat. Hist., ser.4 v.15 p.74 | 1893 B.p. (part.), A. Della Valle 
in: F. Fl. Neapel, v.20 p. 752. 


In general agreement with B. pelagiea. Pleon segment 4 without dorsal 
spinules. Eyes rather large, oblong oval or reniform, very dark. Antenna 1 
in C, flagellum 9-jointed; accessory flagellum, 24 joint extremely small, - 
1° with group of spinules in middle of inner margin. Antenna 2 in adult S 
scarcely more than half length of body, flagellum about twice as long as 
pedunele, with 17 joints, the first 15 each with rather large calceolus. Gnatho- 
pod 1, 6 joint ovate, about as long as 5t", finger hook-like. Uropod 3, 


. 24 joint of outer ramus scarcely more than '/, length of 1%, which is rather 


expanded. L. 6 mm. 
Arctic Ocean, North-Atlantie and North-Sea (Finmark, Great Britain, France). 


5. B. pilosa Lindstr. 1855 B. p.,“Lindström in: Öfv. Ak. Förh., 0.12 p.59 t.2 
f.1—11 | 1891 B.p., G. O. Sars, Crust. Norway, v.1 p.133 t.45 f.2 | 1893 B.p. (part.), 
A. Della Valle in: F,F]. Neapel, v.20 p. 752. 


In general agreement with B.pelagica. Pleon segment 4 slightly impressed 
and with no dorsal spines behind the forward eurving setules. Eyes in O small, 
rounded oval, in © somewhat larger, blackish. Antenna 1, 1°t joint scarcely 
twice as long as 24 and 34 combined, flagellum in © 6-, in C 12-jointed; 


he a RT ro I bi Ei - ER 
ud howel,; “r bee? BZ N, er Er 
er, n be N: 2 ae 


122 Bathyporeia, Platyischnopus 


accessory flagellum, 1 joint much coarser than in B. pelagica, 24 little more than 
!/, aslong. Antenna 2 in Q little longer than antenna 1, flagellum shorter than 
ultimate and penultimate joints of pedunele combined, 8-jointed, in nearly as 
long as the body. Gnathopod 1, 6%% joint oval, about as long as 5t", Peraeopod 3, 
4th joint considerably expanded, densely fringed, much longer than the short 
5th and 6% combined. Peraeopods 4 and 5 much shorter and coarser in structure 
than. in the other 4 species. Uropod 3, 1% joint of outer ramus rather 
expanded, 29 scarcely more than '/, as long. Lobes of telson comparatively 
short, each with 6 apical and 3 lateral spines.. L. about 5 mm. 


Baltic, Kattegat. Depth 4--75 m. 


B.lindströmi Stebb.*) 1893 B. pilosa (part.) (err., non Lindström 1855)), 
A. Della Valle in: F, Fl. Neapel, ©.20 p. 752 t.5 f.1; t.36 f. 19-32. 


General aspeet robust. Side-plate 1 ending obtusely, 24 with tooth at hinder 
angle (front in text). Pleon segment 3, angles rounded, segment 4 carrying a single 
forward bending setule and a pair of spinules.. Eyes oval, scarlet. Antenna 1 in 2, 
‚flagellum 5- or 6-jointed. Antenna 2 in 2, flagellum 10-jointed, nearly equal ultimate 
and penultimate joints of peduncle combined. Gnathopod 1, 6th joint broadly oval, 
much shorter than 5th. Peraeopods 2, 3 and 4 as in B. pelagica (p. 120), peraeopod 5 
elongate as in B. graeilis (p. 121), but the finger said to be wanting. Uropod 3, outer 
ramus, 24 joint about ?/; length of 1st. Apices of telson said to be rounded. No apical spines 
mentioned or figured. Body pellueid, colourless, or with a yellowish tinge. L. 5 mm. 


Bay of Naples. Depth 10—20 m, in sand. 


2. Gen. Platyischnopus Stebb. 


1888 Platyischnopus (Sp. un.: P. mirabilis), T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.830 | 1893 Platyschnopus, A. Della Valle in: F. Fl. Neapel, ©.20 p. 784. 
Head (Fig.31) long, rostrate. 
re Side-platesI—3 small, 4!" quadrate. 
Antenna 2attached in front of eyes 
to lower surface of head, 24 joint 


52 of pedunele longer than 1% or 
N / 34, flagellum in O few-jointed, 
Ay ( ( L not longer than peduncle, accessory 


flagellum half as long, 3-jointed. 

N Antenna 2 (Fig. 31) very little 
longer than antenna 1, attached 
behind the eyes, ultimate joint of 

peduncele shorter than penultimate, 

IN ee Accessory longer than the3-jointed flagellum. 
flagellum Upper lip evenly rounded. Lower 

lip without inner lobes. Mandible, 

N N eutting edge narrowly produced, 

DT} ! N er En accessory plate 
perhaps wanting, no spine-row, 

molar prominent, denticulate, palp 

rn with 39 joint shorter than 24, both 

ed a naeh long and slender. Maxilla 1, 

inner plate small, outer with 8 or 

9 nearly simple spines, palp 1-jointed with 3 setae. Maxilla 2, outer plate 
the broader. Maxillipeds, inner plates not large, outer narrow, with strong 


*) Spec. nov. After Gustaf Lindström. 


Platyischnopus 123 


spine-teeth on inner margin, reaching beyond long 2% joint of palp. Gmatho- 
pods 1 and 2 long and slender, distinetly chelate, or gnathopod 1 nearly simple, 
24 and 5th joints elongate. Peraeopods 1 and 2 small, 4 joint longer than 
5th or 6th, Peraeopod 3, 24, 4th and 5tk joints more or less widened. Peraeo- 
 pod 4, 24 joint oval, 4 and 5 much expanded. Peraeopod 5, 24 joint 
much broader than long, 4!" and 5tk well expanded. Uropod 1, outer ramus 
a little, uropod 2 (and probably urepod 3), outer ramus much longer than 
inner. Telson rather longer than broad, widely emarginate at apex or 
-  deeply eleft. 

The hood-like shape of head and the 1-jointed palp of maxilla 1 approximate 
this anomalous genus to the Phoxocephalidae (p. 133), the long, slender, chelate 
gnathopods 1 and 2 and the emarginate telson to some Acanthonotozomatidae (p. 210). 


2 species. 


Synopsis of species: 


Gnathopods 1 and 2, 3d joint elongate ... . . ... 1 P-mirabilis ... . p.123 
Gnathopods 1 and 2, 3d joint very short. . ... - . 2. P. neozelanicus . p. 123 


=. 1. P. mirabilis Stebb. 1888 P.m., T. Stebbing in: Rep. Voy. Challenger. v.29 
5 p. 830 t.58 | 1893 Platyschnopus m., A. Della Valle in: F. Fi. Neapel, v. 20 p.785 
t. 60 £. 86. 

Head longer than peraeon segments 1—3 combined, shallower where 
the small, round, dark eyes are placed than before or behind them (Fig. 31). 
Rostrum pointed. Pleon segment 3, postero-lateral angles produced into 
a small, acutely upturned point. In antenna 1 and 2 all the flagella slender, 
1° joint longest. Gnathopod 1, 3% joint elongate, 6* joint the widest 
of all, rather shorter than the 5*b, its front margin much shorter than the 
hinder, being thus produced into an acute triangle for antagonism with the 
small nail-tipped finger. Gnathopod 2, all the joints except the finger 
longer than in gnathopod 1, 6" joint rather more than half as long as 5t, 
the chela-forming process shorter and sharper than in gnathopod 1. Peraeo- 
pods 1 and 2, 4% joint rather long and broad, finger slender, tapering. Peraeo- 
pods 3—5, 4 and 5t" joints with many groups of spines; in peraeopod 3 
24 joint widened below, in peraeopod 4 regularly and rather broadly oval,« 
in peraeopod 5 partially fused with the side-plate, twice as broad as long, 
with aeute hinder angle. Peraeopod 5, 4 and 5tk joints greatly expanded. 
Uropod 3, peduncle rather stout, much longer than one of the rami, the 
other ramus unknown. L. about 8 mm. 


Port Jackson [East-Australia], depth 4—19 m; tropical Atlantie (harbour of Bahia). 


en RE EINE Or 


2. P. neozelanieus Chilton 1897 P.n., Chilton in: Ann. nat. Hist., ser. 6 
v.1%&p.1.t5. . 


Body rather broad, chiefly at peraeon. Head and position of antennae as in 
P. mirabilis. Antenna 1 rather shorter than antenna 2, peduncle longer than 
flagellum, 2 joint a little longer than 1°t, oblong, with 4 or 5 long plumose setae, 
flagellum 5-jointed, accessory flagellum 3-jointed. Antenna 2, peduncle stout, 
flagellum apparently about as long as ultimate joint of peduncle. Mouth-parts 
not preeisely known. Gmnathopod 1, 24 joint ending in 2 long setae, 31 short, 
5th Jonger and wider than 6t", setose on sinuous hind margin, 6% slightly 
widened distally, with long setae on distal half of hind margin, no distinet 
palm, finger rather small. Gnathopod 2 similar in general shape but rather 
longer, 5! joint twice as long as 6!", and widened near the base, 6!" produced 


124 Platyischnopus, Haustorius 


distally to a small tooth, forming a little chela with the minute finger. 
Peraeopod 1, 6 joint rather longer than 5%, apex oblique with about 
6 spiniform setae, a little longer and more slender than the finger. Peraeo- 
pod 2 rather longer than peraeopod 1, 5tk joint with convex hind margin, 
carrying about 6 plumose setae, which reach beyond the finger. Peraeopod 3, 
24 joint as broad as long, remainder not very different from P. mirabilis. 
Peraeopod 4 similar to peraeopod 3. Peraeopod 5, 2° joint broader than 
long, 4!" and 5tk moderately expanded. Uropod 3, peduncle much shorter 
than rami, outer slightly longer, 2-jointed, each with 2 or 3 long plumose 
setae. Telson double or deeply «left, each lobe with 2 lateral setules and 
a stout apical spine. L. about 4 mm. 


Otago Harbour [New Zealand]. 


3. Gen. Haustorius St. Müll. 


1775 Haustorius (Sp. un.: H. arenarius), St. Müller in: Slabber, Phys. Belustig., 
p-48 | 1888 H., T. Stebbing in: Rep. Voy. Challenger, v.29 p.39 | 1891 H., G. O. Sars, 
Crust. Norway, v.1 p.134 | 1893 H., A. Della Valle in: F. Fl. Neapel, 0.20 p.750 | 1818 
Lepidactylis (Sp. un.: L. dytiscus), Say in: J. Ac. Philad., v.1ıı p.379 | 1825 Pterygocerus 
(Sp. un.: Oniscus arenarius), Latreille in: Enc. möth., v.10 p.236 | 1829 Pterygocera, 
Latreille in: G. Cuvier, Rögne an., n. ed. v.4 p.124 | 1851 Bellia (Sp. un.: B. arenaria) 
(non H. Milne Edwards 1848, Decapoda!), Bate in: Ann. nat. Hist., ser.2 v.7 p.318 | 
1854 Sulcator, Bate in: Ann. nat. Hist., ser.2 v.13 p. 504. 


Back broad, except in pleon segments 4—6, which are usually folded 
in. Head with small rostrum. Side-plates 1—3 obtusely pointed, 4 little 


Accessory _ 
flagellum 


Fig.32. Antenna1l. Fig. 33. Antenna 2. Fig. 34. Maxilla 2. 
Fig. 32—34. H.arenarius. [After G. O. Sars.] { 


excavate. Antennae 1 and 2 (Fig. 32, 33), joints of peduncle very distinct, 
with fan-like armature of plumose setae chiefly on penultimate, flagellum 
shorter than peduncle; accessory flagellum of 
antenna 1 well developed; penultimate joint of 
peduncle of antenna 2 longer and greatly wider 
than ultimate. Mandible normal, palp large, 
34 joint not shorter than 24. Maxilla 1, inner 


narrowed, palp with 2 sets of setae on 2 joint. 
Below the base is a setose lamina, of which 


been explained. Maxilla 2 (Fig. 34), inner 
Fig. 35. H. arenarius. plate with a sinuous setose ridge on the 
ie see surface, outer much larger, semilunar, densely 


setose on inner and ciliated on outer margin. Maxillipeds, inner and outer 


plates subequal, narrow, fringed on inner margin, 24 joint of palp large, 


ARFRINT 
ENT 
* 
BD 


plate small, with several setae, outer apically- 


6° joint the homology and function have not hitherto 


{er 


a 


Be nz 


PER 
EEE 
Fe FR NET: 


2 wi N, Ne IT % we 
IE nl Pi ee Sn Sn, 


Ka 
a 


Ki 


Haustorius, Cardenio 


much produced, 34 sharply bent, 4" wanting. Gnathopod 1 simple, 5tk joint 
much broader and longer than 6'%, finger small. Gnathopod 2, forming a 
minute chela. Peraeopods 1 and 2, 4% and 5th joints rather broad, 5tk and 
6! short, 5t% widened distally. Peraeopods 3—5 (Fig. 35) with 24, 4th 
and 5tk joints much expanded and carrying many spines and setae. Finger 
wanting in all peraeopods. Pleopods weak. Uropod 1 strong, spinose; uropod 2 
smaller, setose; uropod 3, outer ramus 2-jointed, longer than inner, setose 
at tip. Telson short, much broader than long, not tapering, a little incised. 


1 species. 


1. H. arenarius (Slabber) 1769 Oniscus a., O. arenatius, Slabber, Natuurk. 
Verlustig., p. 92 t.11 £.3,4 | 1775 Hausiorius arenarius, St. Müller in: Slabber, Phys. 
Belustig., p.48 | 1891 H.a., G.O. Sars, Crust. Norway, v.1 p.135 t.46 | 1893 H. a., 
A. Della Valle in: F. Fl. Neapel, 0.20 p.750 t.60 f.22,23 | 1825 Oniscus a., Pterygocerus, 
Latreille in: Enc. meth., v.10 p.236 | 1829 O.a., Pterygocera, Latreille in: G. Cuvier, 
Rögne an., n. ed.v.4 p.124 | 1878 P.arenaria, Bovallius in: Bih. Svenska Ak., v.4 nr. 8 
p-1 t.1—4 | 1851 Bellia a., Bate in: Ann. nat. Hist., ser.2 v».7 p.318 t.11 f. 1-8 | 1854 
Sulcator arenarius, Bate in: Ann. nat. Hist., ser.2 v.13 p.504 | 1871 S. arenatius, 
A. Boeck in: Forh. Selsk. Christian., 1870 p.137 | 1818 Lepidactylis dytiseus, Say in: 
J. Ac. Philad., v. 11 p. 380. 


Pleon segment 3 much larger than 1° or 24, angles rounded, setose. Eyes 
small, imperfectly developed, light-coloured. Antenna 1 (Fig. 32), flagellum 
9-jointed, accessory flagellum 5-jointed. Antenna 2 (Fig. 33) little longer 
than antenna 1, flagellum 10-jointed. Gnathopod 2 more slender than gnatho- 
pod 1, 6! joint much shorter than 5tk, In peraeopod 4 (Fig. 35), 4" joint 
much larger than in the other pairs, longer than broad. In peraeopod 5 
4% joint much broader than long. Telson twice as broad as long, cleft 
not reaching the middle, each lobe with .an apical tuft of spinules and 2 
lateral spinules. Colour paler than sand. L. © 11 mm. 


Burrows with great dexterity in wet sand. Will live long in suitable eonfinement. 
North-Atlantie (Holland, France and Britain, North-America); Kattegat. 


4. Gen. Cardenio Stebb. _ 


1888 Cardenio (Sp. un.: C. paurodactylus), T. Stebbing in: Rep. Voy. Challenger, 
.29 p.806 | 1893 C., A. Della Valle in: F. Fl. Neapel, v.20 p.749 | 1890 Cardenis, 
Warburton in: Zool. Ree., 0.25 Crust. p. 18. 


Head somewhat produced. Side-plate 1 very small, 4 broader than 
deep, scarcely excavate. Antenna 1 shorter than antenna 2, accessory 
flagellum small, with 2 joints, 22 minute. Mandible short, strong, cutting edge 
quadri-dentate, accessory plate rather stronger on left than on right mandible, 
left with 3, right with 2 spines in spine-row, molar strong, palp broad, 
3% joint much shorter than 24, Maxilla 1, 12 setae on inner plate, 9 spines 
on outer, several spinules and setules on 24 joint of palp. Maxilla 2, both 
plates broad, inner with lateral as well as apical armature. Maxillipeds, 
inner plates moderate, outer fringed with spinules, nearly reaching apex of 


‚palp’s long 24 joint; 1° of palp very short, 4" rudimentary or wanting. 


Gnathopods resembling those of Synopia. Gmnathopod 1, 5!" joint broad 
and long, 6! narrower, only half as long, both fringed with spines and 
setae, finger rudimentary. Gnathopod 2, 24, 5tk and 6th joints long and 
slender, 6° more than half as long as 5'%, capable of celosing against it; 
both carrying long setae, finger wanting. Peraeopods 1—5, 4!" joint widened, 


126 Cardenio, Priseillina 
little in 24, greatly in 3% pair; longer than 5tk in all but the 1% pair; 5th 
joint rather wide; finger wanting in 1°, 24 and 5% pairs; short and blunt, tipped 
with long spine in 34 and 4" pairs. Uropod 1, peduncle longer than sub- 
equal rami; uropod 2, peduncle intermediate in length between rami; uropod 3, 
peduncle much shorter than lanceolate rami. Telson long, tapering, celeft 
nearly to base. 


1 species. 


1. C. paurodactylus Stebb. 1888 C.p., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.806 t.53 | 1893 C©.p., A. Della Valle in: F. Fl. Neapel, v.20 p.750 | 1890 Cardenis 
?.. Warburton in: Zool. Rec., v.25 Crust. p. 18. 


Back rounded, head as long as peraeon segments 1 and 2 combined. 
Hind margin of pleon segments dorsally dentieulate. Pleon segment 3, 
postero-lateral angles acute, segments 4—6 comparatively long. Eyes reniform, 
small but with numerous components, set near front of head, dark in spirit. 
Antenna 1, joints of pedunele nearly equal, not long, flagellum in O 4-jointed. 
Antenna 2, ultimate joint of peduncle rather longer than penultimate, flagellum 
in © 5—7-jointed. Gnathopod 2, 6% joint with an apical projecting point. 
Peraeopod 3, 24 joint almost eireular, but wider than deep. Peraeopod 4, 
24 joint with sinuous hind margin, little wider than the 4!" and not so 
long. Peraeopod 5, 2° joint more expanded, 4" shorter, 6 Jonger than 
in preceding pair. L. 5 mm. 

Southern Indian Ocean (Kerguelen Islands). 


5. Gen. Priscillina Stebb. 


1871 Priscilla (Sp. un.: P. armata) (non Jam. Thomson 1864, Coleoptera!), 
A. Boeck in: Forh. Selsk. Christian., 1870 p.124 | 1891 P., G. ©. Sars, Crust. Norway, 
e.1 p.125 | 1888 Priseillina, T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1680 | 1893 
P., A. Della Valle in: F. Fl. Neapel, v.20 p. 754. 


Side-plates 1—4 strong, ending below in an obtuse, setose point, side- 
plate 5 small. Antenna 1 shorter than antenna 2, accessory flagellum rather 
large; peduncle setose in both pairs. Mandible normal, palp robust. Maxilla 1, 
inner plate large with many setae; maxilla 2, plates subequal. Maxillipeds, 
outer plates scarcely reaching end of 24 joint of palp. Gnathopods 1 and 2 
subchelate, 6! joint as broad as 5tk, finger rather short. Peraeopods 1—5 
with many fascieles of spines, finger minute. Peraeopods 3 and 4, 24 joint 
little expanded, upper hind angle (at least in Q) produced to a hook-like 
process. Peraeopod 5, 24 joint greatly expanded, densely setose. Uropods 1—3 
rather robust. Uropod 3, outer ramus spinose, with minute 24 joint, inner 
very small. Telson laminar, deeply notched. 


1 speeies. 


1. P. armata (Boeck) 1861 Pontoporeia a., A. Boeck in: Forh. Skand. Naturf., 
Mode 8 .p.648 | 1871 Priseilla a., A. Boeck in: Forh. Selsk. Christian., 1870 p.124 | 
1891 P.a., G.O.Sars, Crust. Norway, v.1 p.126 t.42 | 1888 Priseillina a., T. Stebbing 
in: Rep. Voy. Challenger, v.29 p.1719 | 1893 P.a., A. Della Valle in: F. Fl. Neapel, 
v.20 p. 754 t. 60 f.24, 25. 


‚Head with sharply produced postero-antennal angles. Body rather 


robust, back broad. Pleon segments 2 and 3 dorsally ending in upturned 
acute process, postero-lateral eorners rounded. Eyes inconspieuous (in spirit). 
Antenna 1, flagellum much shorter than peduncle, 10-jointed, accessory 


r 
N Bu TEN FEIPER N a fs 
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Priseillina, Pontoporeia 127 


flagellum more than half length of primary, 5-jointed. Antenna 2, ultimate joint 
of peduncle much smaller than large penultimate, flagellum in 9 about half 
length of peduncle. Gmnathopod 1, 6! joint as long-as 5t%, rather broader, 
palm oblique. Gnathopod 2, palm transverse. Peraeopod 3, hook of 2% 
joint larger than in peraeopod 4. Peraeopod 5, 24 joint nearly orbicular, 
5th oradually expanded distally, with series of short spines. Telson little 
longer than broad, notched widely a fourth of length, each truncate apex 
with 4 spinules. L. 11 mm. 


Aretie Ocean and North-Atlantie (Greenland; West-Norway?). 


6. Gen. Pontoporeia Kroyer 


1842 Pontoporeia (Sp. un.: P. femorata), Kroyer in: Naturh. Tidsskr., «.4 p.152 | 
1891 P., G.O. Sars, Crust. Norway, v.1 p.122 | 1893 P., A. Della Valle in: F. Fi. Neapel, 
v.20 p.716 | 1846 Pontoporia, L. Agassiz, Nomencl. zool., Index p.305 | 
1853 Pontiporeia, J. D. Dana in: U. S. expl. Exp., v.13ur p. 912. 


Side-plate 5, front lobe the larger. Antennae 1 and 2 
in 9 subequal, with short flagella, in C flagella long. Mandible 
normal, palp slender, setose. Maxilla 1, inner plate with a 
few setae. Maxilla 2, outer plate the broader. Maxillipeds, 
outer plates not quite reaching end of broad 24 joint of palp, 
palp’s 4" joint small. Gnathopod 1 setose, 5!" joint laminarly 
expanded, 6! smaller than 5%, palm ill-defined, finger feeble. 
Gnathopod 2 slender, subchelate or almost chelate, 6" joint 


narrow, finger small. Peraeopod 4 the longest. Peraeopods 1 Pp. Bihocate 


and 2, 4tk joint rather long. Peraeopods 3 and 4, 24 joint _ Peraeopod 5. 


slightiy expanded, narrowed below. Peraeopod 5 (Fig. 36). 0 Sams] 


24 joint greatly expanded, setose. Peraeopods 1—5, finger small. Uropod 3 
short, rami 1-jointed, outer the larger. Telson squamiform, deeply celeft. 


3 species accepted, 1 doubtfully distinet. 


Synopsis of accepted species: 


Gnathopod 1, palm short ......... 1. P. mierophthalma . . p. 127 
Gnathopod 1, palm not short — 2. 


Pleon segment 4 with furcate dorsal process. 2. P. femorata. .. . . p. 128 
2 Pleon segment 4 without dorsal process or 
DOIBRL DE a ia 0. PB p- 128 


1. P. microphthalma 0. Sars 1896 P. m., (0. Grimm in MS.) G. O. Sars 
in: Bull. Ac. St.-Pötersb., ser.5 v.4 p.428 t.2 f. 1—7. 


Back not broad. Pleon segment 4 dorsally raised at apex with 2 denticles 
(spines?) at top and a spinule on each side. Head,” lateral corners narrowly 


' rounded. Side-plates and pleon segment 3 as in P. affinis (p. 128). Eyes small, 


irregularly oval, pigment light. Antenna 1, flagellum subequal to peduncle, 
9-jointed, accessory flagellum 3-jointed. Antenna 2, last 3 joints of peduncle 
thick, hirsute, flagellum 9-jointed. Gnathopod 1 with much shorter palm 
than in the other 2 species. Gnathopod 2, palm transverse, not as in the 
other 2 species produced to a thumb-like prominence. Peraeopod 5, 24 joint 
longer than rest of limb, more regularly rounded oval than in the 'other 
2 species, with which the uropods and telson agree. L. (0?) 6 mm. 


Caspian Sea. Depth 144---162 m. 


128 Pontoporeia, Urothoe 


2. P. femorata Kroyer 1842 P.f, Kroyer in: Naturh. Tidsskr., «4 p.153 | 
1846 P. f., Kroyer in: Voy. Nord, Crust. t.23 f.2a—y | 1891 P. f., G. O. Sars, Crust. 
Norway, o.1 p.123 t.41 f.1| 1893 P. f., A. Della Valle in: F. Fl. Neapel, ©.20 p. 717 
t.60 £.7 11859 P. furcigera, R. M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 nr. 1 
p.49 t.2 f.8 | 1884 P. f., H. Blanc in: N. Acta Ac. Leop., v.47 p.60 t.7 £.40-—44. 

Back broad. Head, lateral corners angular. Side-plates 1—3 with 
tooth at lower hind corner, 1° broadly expanded, 5tt with front lobe deep. 
Pleon segment 3, postero-lateral angles narrowly rounded; segment 4 with 
bifurcate process on the back. Eyes reniform, bright red. Antenna 1 in 
O, flagellum shorter than peduncle, 9-jointed, accessory flagellum 2-jointed. 
Äntenna 2 in O, ultimate and penultimate joints of peduncle subequal, together 
equal to 12-jointed flagellum. Gnathopod 1, 5! joint very broad, 6!" obliquely 
and broadly oval, finger very slender and curved. Gmathopod 2, 6% joint 
a little shorter than 5tt. Peraeopod 5 (Fig. 36), 24 joint very broad, much 
longer than rest of limb. Uropod 3, outer ramus considerably larger than 
inner, densely spinose on outer edge. Telson rather longer than broad, 
cleft beyond centre, 3 setules on each rounded apex. Colour paleyellowish. 
L. 9 14—17 mm. 


Arctie Ocean; North-Atlantie (Labrador, Norway); Kattegat; Baltic. Depth 
38—188 m. 


3. P. affinis Lindstr. 1855 P. a., Lindström in: Öfv. Ak. Förh., v.12 p.68 | 
1867 P.a., G. O. Sars, Crust. d’Eau douce Norvege, p.82 t.7 £.10-—25; 1.8 f.1—5 | 
1891 P..a., G. O. Sars, Crust. Norway, v.l p.124 t.41 f.2 | 1893 P..a. (part.), A. Della 
Valle in: F. Fl. Neapel, ©.20 p.717 t.54 f.1 | 1885 P. femorata (err., non Kroyer 1842!), 
H. Blane in: N. Acta Ac. Leop., v.47 p.58 t.6 f.33; t.7 f. 34—39. 


Back less broad than in P. femorata. Pleon dorsally hirsute, segment 4 
without process. Head, lateral corners narrowly rounded. Side-plates 1— 3 without 
tooth, 1° little expanded, 5! with front lobe not very deep. Pleon segment 3, 
corners subquadrate. Eyes small, oval, black. Antenna 1 in 9, flagellum as 
long as peduncle, accessory flagellum 3-jointed. Antenna 1 in f) (P. filieornis 
Smith), flagellum 35-jointed; antenna 2 in d‘, flagellum 50-jointed. Gnathopod 1, 
öth joint of moderate breadth, 6!" narrow oval. Gmathopod 2, 6th joint 
about as long as 5Ü, Peraeopod 5, 24 joint scarcely longer than rest of 
limb. Uropod 3 in Q very small. Telson small, broader than long, cleft 
about to centre (Sars) or nearly to base (Blanc). Colour yellowish, orange- 
tinged, bluish-green borders. L. 9 8 mm. 

Fresh water lakes (Norway, Sweden, Russia, North-America); Baltic, Kattegat, 
Kara Sea, North-Atlantie (France). 

P.hoyi S.I. Sm: 1871 P.affinis (err.?, non Lindström 1855), S. 1. Smith (& 
A.E. Verrill) in: Amer. J. Sci., ser.3 v.2 p.452 | 1893 P.a. (part.), A. Della Valle in: 
F, Fl. Neapel, v.20 p.717 | 1874 P. hoyi + Pontiporeia filicornis, S. I. Smith in: Rep. 
U. S. Fish. Comm., %.2 p.647 t.2 f.5; p. 649. 

Neither the „papilliform appendages“ (mentioned also by Sars 1867 in P. affinis) 


on the sternal portion of the thoracie segments in P. hoyi, nor ehe long flagella with 


calceoli in P. filicornis 3 are of specific value. 
North-America (Lake Superior, Lake Michigan). 


[3 


. Gen. Urothoe Dana 


1852 Urothoe, J. D. Dana in: Amer. J. Sei., ser.2 v.14 p.311 | 1853 D. (part.), 7. D. 
Dana in: U. S. expl. Exp., v. 1311 p.920 | 1857 Ur othoß, Bate in: Ann. nat. Hist., ser.2 v.19 
p.145|1891 Urothoe, T.Stebbing in: Tr. zool. Soe. London, v.131 p.1|1891 Urothog, G.0. 
Sars, Crust. Norway, v.1 p.137 | 1893 Urothoe, A. Della Valle in: F. Fl. Neapel, v.20 p. 663 | 
1855 Egidia (Sp. un.: E. pulchella), A. Ödsta in: Rend. Soe. Borbon., n. ser. v.2 p. 170. 


N: 


Sb hab Babel) En ac u sus isn Alu, 237 Sub nahen 


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Urothoe 129 


Body robust. Head slightly produced, sides triangular downward below 
the antennae. Side-plates not large. Gland-cells numerous. Antenna 1, 
joints of peduncle not very unequal, flagellum and accessory flagellum very 
short. Antenna 2, peduncle spinose, ultimate joint in S with calceoli, flagellum 
in © 2- or 3-jointed, in d long, many-jointed, with calceoli. Upper lip rounded. 
Mandible, eutting edge scarcely denticulate, accessory plate small, spine-row 
wanting, molar strong, palp slender, 1° joint not short, 39 as long as or longer 
than 24. Maxilla 1, inner plate slight, number of setae small, variable, 
outer plate with 11 spines, 24 joint of palp equal to or longer or shorter 
than 1°, with 3 apieal setae. Maxilla 2, inner plate with armature on 
inner margin, outer rather the broader. Maxillipeds, plates of moderate 
size, outer fringed with spines, 24 joint of palp produced, 39 club-shaped, 
4th slender. Gnathopods 1 and 2 similar, weakly subchelate, 6!" joint shorter 
than 5t"; finger longer in gnathopod 1 than in gnathopod 2. Peraeopods 1 and 2, 
4th joint longer than either 5tt or 6, both of which are strongly spined. 
Peraeopod 3, joints 2—5 dilated, 24 quadrate, joints 4—6 strongly spinose, 
joint 5 as wide as or wider than 4"; peraeopod 4 the longest; peraeopods 4 and 5, 
24 joint oval, others not expanded. All the legs have a cap over finger-tip. 
Peraeopods 1—5, finger nodulous or serrulate. Pleopods, inner ramus the 
shorter. Uropods 1 and 2, rami narrow. Uropod 3, rami foliaceous, not very 
unequal, setose especially in S. Telson cleft nearly to base. As a rule 
peraeopods 1 and 2 have a row of setae on outer surface of joints 4 and 5; 
there are long plumose setae in peraeopod 3 on inner distal margin of 
joints 4 and 5 and on inner surface of joint 6, in peraeopod 4 on inner 
surface of 24 joint and hind margin of 4b, in pleon segment 2 on lower 
inner surface. 

7 species accepted, 3 obscure. 


Synopsis of the accepted species: 


1 a RI er AEE a 1. U. abbreviata . p.129 
\ With eyes — 2. 
9. J Uropod 1, rami strongly eurved. .... 2... 2. U. marina . . . p.130 


\ Uropod 1, rami not strongly eurved — 8. 
3 Peraeopod 3, 5th joint extremely broad — 4. 
'\ Peraeopod 3, 5th joint not extremely broad — 5. 


4 j Uropod 3, inner ramus longer than outer . ... . 3. U.grimaldii . . p.130 
\ Uropod 3, inner ramus shorter than outer . . . . 4. U. pulchella . . p. 130 
f Uropods 1 and 2 strongly armed ........ 5. U. poucheti . . p.13l 
\ Uropods I and 2 weakly armed — 6. 

6 j Antenna 1, accessory flagellum long. .... ». 6. U. brevicornis . p.131 
\ Antenna 1, accessory flagellum short ..... . . 7. U. elegans . . . p.13l 


1. U. abbreviata O.Sars 1879 U.a, G.O.Sars in: Arch. Naturv. Kristian., 
v.4 p.446 | 1885 UT. a., G. O. Sars in: Norske Nordhavs-Exp,, v.6 Crust. I p.164 t. 14 
f.1| 1891 D.a., T. Stebbing in: Tr. zool. Soe. London, v».131 p.3, 9 | 1895 UT. irrostrata 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 664. 

Body remarkably short and thick-set. Pleon segment 3, postero-lateral 
eorners quadrate. Eyes wanting. Antenna 1 much longer than antenna 2, 
3 joints of peduncle uniform in length, flagellum 4-jointed, accessory flagellum 
1-jointed. Peraeopod 3, 24 joint short and broad, the others greatly (moderately 
in figure) dilated at the extremity, finger almost straight. Uropod 3 very 
small. Telson small. Colour yellowish white. L. 4 mm. 

Perhaps the young of U. elegans (p. 131). 

Arctic Ocean (Finmark). Depth 1167 m. 

Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 9 


130 Urothoe 


2. U. marina (Bate) 1857 Sulcator marinus, Bate in: Ann. nat. Hist., ser. 2 
e.19 p.140 | 1862 Urotho& m., Bate, Cat. Amphip. Brit. Mus., p.115 t.19 f.2 | 1869 
U. m.? var. pectinatus, E. Grube in: Abh. Schles. Ges., 1868/69 p.119 | 1891 TU. m., 
T. Stebbing in: Tr. zool. Soe. London, v. 131 p.16 t.2 | 1893 TD. irrostrata (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 664. 


Eyes very large in adult ©, nearly meeting on top of head. Antenna 1, 
34 joint ?/, length of 24, flagellum 9-jointed, accessory flagellum 5-jointed. 
Antenna 2, flagellum in O as long as ultimate joint of peduncle, flagellum 
in C 50-jointed. Maxilla 1, inner plate with 4 or 5 setae, joints of palp equal. 
Gnathopod 1, 5t" joint having at the distal margin a row of 12 pectinate spines 
and a row of microscopie spinules; gnathopod 2 without these rows, palm less 
oblique, finger shorter than in gnathopod 1. Peraeopods 1 and 2, finger with 
5 tubereles on hind margin. Peraeopod 3, 24 joint very broad, hind corners 
‘obtuse, 39 broader than long, 4" rather longer, scarcely wider, inner apical 
margin fringed with 16 very long plumose setae, 5tk nearly as long as 34 
and 4th combined and slightly wider, 6th Jonger, much narrower than 5#, 
7th nearly as long as 6**, rather broad, except at tip, with about 13 nodules 
on front margin. Uropod 1, peduncle equal to outer ramus, rami smooth, 
strongly eurved, inner much less than outer; uropod 2 smaller, rami 
smooth, slightly eurved, outer scarcely longer than inner; uropod 3, rami 
subequal, rather long, moderately broad, in G densely plumose, outer with 
minute 24 joint. Telson, length and breadth equal, cleft nearly to base, 
each apex with feathered cilium, spine and 3 setae. L. 8 mm. 

North- Atlantie (Shetland Islands, Moray Firth, Firth of Clyde, Liverpool 
Bay, France). 


3. U. grimaldii Chevreux 1895 U. g., Chevreux in: Mem. Soc. zool. France, 
v.8 p.498 f. 1-4. | 


Q unknown. — d. Eyes very large, oval, meeting on top ofhead. Antennal, 
24 joint of peduncle rather longer than 1°, 1° than 34, flagellum shorter 
than 34, 4-jointed. Antenna 2, flagellum 40-jointed. Mouth-organs more 
robust than usual. Maxilla 1, inner plate small, with 3 setae, outer plate 
very. broad, 1° joint of palp longer than 24, Gnathopods 1 and 2 rather slender. 
Peraeopod 3, 24 joint with hinder angles rounded, 3% and 4tk subequal, ‚St 
2'/, times as broad as long, with very numerous spines, finger having 5 
or 6 long spines on front margin. Uropods 1 and 2 with slender subequal 
rami, inner branch in 1° slightly armed. _Uropod 3 uniquely having the 
inner ramus rather longer than the outer; 24 joint of outer minute. Telson 
cleft nearly to the base, a little broader than long, with 2 spinules on each 
apex. I. 35 mm. 


Mediterranean (Morocco). Depth 2 m. 


4. U. pulchella (A. Costa) 1853 Egidia p., A. Costa in: Rend. Soc. Borbon., 

n. ser.v.2 p.172 | 1876 Urotho@p., A. Boeck, Skand. Arkt. Amphip., v.2 p. 225 | 1891 
- D.p., T. Stebbing in: Tr. zool. Soe. London, v.181 p.11 t.4A | 1893 D. irrostrata (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 664 t.5 f.3,8; t.36 f.1—18; t. 60 £.11, 12. 


Eyes in S reniform, except in smaller stages, in © eircular. Antenna 1, 
1°t and 24 joints equal, 34 rather shorter, flagellum 5- or 6-jointed, little 
longer than ultimate joint of peduncle, accessory flagellum 3- or 4-jointed, longer 
than half primary. Antenna 2, flagellum in © scarcely as long as ultimate joint of 
peduncle, flagellum in S 34-jointed. Maxilla 1, inner plate slender, with 6 setae, 
1°t joint of palp rather broader and longer than 24. Gnathopod 1, 7 spines 


Urothoe 131 


in the row on distal margin of 5tk joint. Gnathopod 2, 6% joint about *), 
length of 5%, with the small convex palm more prominent than usual. 
Peraeopod 3, ‚geh joint scarcely longer or broader than 34, 5tk more than 
1!/, times as broad as long, with many spines, finger narrowing abruptly 
to a sharp apex, its front margin not nodulous, but finely serrulate. Uropod 1, 
rami curved, armed with 2 spines; uropod 2 smaller, rami smooth; uropod 3, 
rami plumose but not densely, outer exceeding length of inner by its small 
24 joint. Telson short, a little broader than long, sides convex, each apex 
armed with a spinule. Colour of © grey, tinted on the back with violet, of 
C erimson. L. 5 mm. 


Gulf of Naples, North-Atlantie (West-France). 


5. U. poucheti Chevreux 1888 U.p., Chevreux in: Bull. Soc. zool. France, 


v.13 p.34 | 1891 U. p., T. Stebbing in: Tr. zool. Soe. London, v.131 p.9, 25 | 1893 


U. irrostrata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 664. 


oO unknown. — Q'. Body comparatively slender. Eyes very large and 
dark, meeting on the top of the head. Peraeopod 3, 24 joint with hinder 
angles well rounded, 4!" not broader than 34, not strongly spined, 5th not 
broader than 4b, finger long, slender, distal half serrate. Uropod 1, rami 
equal, slender, not quite as long as pedunele, which is more spinose than 
in other species, outer ramus with 4 spines; uropod 2, rami equal, slender, 
shorter than peduncle, outer with 3 spines; uropod 3, rami long. L. 5 mm. 


North-Atlantie (Azores). 


6. U. brevicornis Bate 1862 U.b., Bate, Cat. Amphip. Brit. Mus., p.116 t.20 
£.1 | 1891 U. b., T. Stebbing in: Tr. zool. Soe. London, v.131 p.23 t.3, dc | 1893 


. U. irrostrata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 664. 


Eyes in J conspicuous, almost contiguous at the top. Antenna 1 in J, 
1° joint longer than 24, flagellum 7-jointed, accessory flagellum 6-jointed, 
more than half length of primary. Antenna 2, flagellum in © shorter than 
ultimate joint of pedunele, flagellum in G 23-or 24-jointed. Maxilla 1, inner plate 
with 3 setae, 1° joint of palp rather longer than 24. Gnathopod.1 as in 
U. marina (p. 130), spines on distal margin of 5*" joint varying in number. 
Peraeopod 3, 24 joint with angles more acute than usual, other joints as 
in U. marina, except finger, which tapers gradually and has finer nodules. 
Uropod 1, pedunecle longer than in U. marina, equal to the rami, which are 
slender, subequal, nearly straight, reaching beyond the 24 pair, outer with 
3 spinules, inner with 1—3 setules; ‚uropod 2, peduncle shorter than rami, 
which are subequal, straight, with 2 or 3 spinules on outer and a spinule 
on the inner. Uropod 3 and telson as in U. marina. L. about 8 mm. 


St. George’s Channel, Bristol Channel and English Channel (Wales and Devonshire). 


7. U. elegans Bate 1857 U.e., Bate in: Ann. nat. Hist., ser.2 ».19 p.145 | 
1861 U. norvegica, A. Boeck in: Forh. Skand. Naturf., Mede8 p.647 | 1891 U. n., G.O. 
Sars, Crust. Norway, v. 1 p.138 t.47 | 1891 DU. elegans + U. n., T. Stebbing in: Tr. zool. 
Soe. London, v.131 p. 13 t.4; p.21 t.4B | 1893 U. irrostrata (vark: 2 A. Della Valle in: 


‚F. Fl. Neapel, v.20 p. 664. 


Eyes moderately large in adult d. Antenna 1, 34 joint °/, length 
of 24, flagellum 6-jointed, accessory flagellum 3-jointed. Antenna 2, flagellum 


‚ing equal ultimate joint of pedunele, 2- or 3-jointed, flagellum in C 40-jointed. 


Maxilla 1, inner plate with 2 setae, joints of palp equal. Peraeopods 1 and 2, 
finger with 3 or 4 distant pointed tubereles. Peraeopod 3, 2 joint rather variable 


9*+ 


132 Urothoe, Urothoides 


in width, 4%" joint longer and wider than 34, 5tk Jonger than broad, not broader 
than 4, finger rather narrow, distal half slenderly tapering, with 7 small 
tubereles on front margin. Uropod 1, rami smooth or almost smooth, 
nearly straight, subequal; uropod 2 much smaller, otherwise similar; uropod 3, 
rami rather broad, plumose, outer rather the longer. Telson longer than 
broad, cleft nearly to the base, with spinule and setule on each apex. 
Colour in life, adorned with rose-coloured markings (Bate), yellowish, changing 
in the © to light orange (Sars). L. 4—6 mm. | 
North-Atlantie (England, Scotland, West-France, Azores, Norway). 


U. bairdii Bate 1862 U. b., Bate, Cat. Amphip. Brit. Mus., p. 114 t.19 £.1| 
1871 U. norvegica (err., non A. Boeck 1861!), A. Boeck in: Forh. Selsk. Christian., 1870 
p. 138 | 1891 U. marinus (part.), T. Stebbing in: Tr. zool. Soc. London, v.131 p.7 | 1893 
U. irrostrata (part.), A. Della Valle in: F. Fl. Neapel, ».20 p. 664. 

L. 5 mm. 


Moray Firth. 


U. igrostrata Dana 1853 & 55 U. irrostratus, J. D. Dana in: U.S. expl. Exp., 
v.1311 p. 922 t.62 f.6a—f | 1891 D.i., T. Stebbing in: Tr. zool. Soe. London, v. 131 
p- 10 | 1893 U. irrostrata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 664. 

Antenna 1, flagellum 6- or 7-jointed, accessory flagellum 2- or 3-jointed. Peraeo- 
pods 4 and 5, finger nodulose on front margin. 


Sooloo Sea. 


U. rubra Giles 1888 U. ruber, G. M. Giles in: J. Asiat. Soc. Bengal, 0.57 p.246 
t.11 !1893 D. r., A. Della Valie in: F. Fl. Neapel, 0.20 p. 895. 


Colour bright briek red. L. about 3 mm. 
Bay of Bengal (Banks of Chittagong). Surface. 


8. Gen. Urothoides Stebb. 


1891 Urothoides (Sp. un.: U. lächneessa), T. Stebbing in: Tr. zool. Soc. London, 
v.131 p. 26. 


oO. Head with obtusely produced and deflexed rostrum. Antennae 1 and 2, 
mouth-organs, gnathopods 1 and 2, peraeopods 1 and 2 nearly as in Urothoe 
(p. 128). The anterior gastrie lobes (triturating organs) scantily armed, not 
profusely as in Urothoe. Peraeopods 1—5, finger slender, not nodulose. Peraeo- 
pod 3, 24 joint expanded but not quadrate, 4!" wider than 5t". Peraeopod 4 with 
24, 4th and 5th joints much expanded, 4tk longer and wider than 5th, 
Peraeopod 5 much shorter than peraeopod 4, 24 joint greatly expanded and 
produced, as long as rest of limb, which is not expanded. Uropod 1, rami 
stiliform, subequal, almost smooth; uropod 2 much smaller, rami slender, 
smooth, subequal; uropod 3, outer ramus of 2 equal joints, inner spiniform, 
not half the length of the outer. Telson little longer than broad, cleft nearly 
to the base, apices acute, not dehiscent. — JS unknown. 


1 species. 


1. U.lachneössa (Stebb.) 1888 Urothoäl., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.825 t.57 | 1893 Urothoe lachneessa, A. Della Valle in: F. Fl. Neapel, v.20 p.667 
t.60 f.13 | 1891 Urothoides lachneössa, T. Stebbing in: Tr. zool. Soc. London, v.131 p.26. 


Back covered with a sort of bristly down. Head at the base and 
peraeon dorsally very broad. Pleon segment 2 without plumose setae; 
segment 3, postero-lateral angles rounded. Eyes wanting or not perceived. 


Bl SU BE una En > u hehe aa lb a 


Urothoides, Phoxocephalidae 183 


Antenna 1 in O, flagellum shorter than pedunele, 5-jointed, accessory flagellum 
2-jointed. Antenna 2 in O, ultimate joint of pedunele shorter than penultimate, 
each with a few strong spines, flagellum 2- or 3-jointed. Gnathopod 1, finger 
nearly as long as the oval hand; no row of pectinate spinules on distal margin of 
5th joint was noticed. Peraeopod 4, the large 24 joint with front margin 
setose, hind margin sinuous, 4! widening and 5!" narrowing distally. Peraeo- 
pod 5, 24 joint strongly serrate behind, produced below the 4'% joint. Telson 
broad at base, narrowing gradually to the acute apices. L. about 4 mm. 


‘ Cumberland Bay [Kerguelen Island]. Depth 236 m. 


5. Fam. Phoxocephalidae 


1857 Phoxides, Bate in: Ann. nat. Hist., ser.2 v.20 p.525 | 1865 Subfam. Phoxina, 
W.Lilljeborg in: N. Acta Soe. Upsal., ser.3 v.6nr.1p.18|1871 Subfam. Phoxinae, A. Boeck 
in: Forh. Selsk. Christian., 1870 p.133 | 1885 Phoxidae, G.O.Sars in: Norske Nordhavs- 
Exp., v.6 Crust. I p. 154 | 1891 Phoxocephalidae, G. ©. Sars, Crust. Norway, v. 1 p. 142. 


Body fusiform. Hooded rostrum covering base of antenna, lateral comers 
of head obsolete, postero-antennal angles distinet. Side-plates rather large, 
15 — 4th obtusely truncate, hinder lobe of side-plate 5 the deeper. Pleon segments 
4—6 in d narrower than in Q. Eyes dorsal, lateral or wanting. Antennae 
more or less modified in C, short in ©, accessory flagella well developed. 
Epistome not projecting. Upper lip rounded. Inner lobes of lower lip usually 
small. Mandible short, cutting edges distinetly developed, molar variable, 
seldom large, palp rather large. Maxilla 1, inner plate small, palp I- or 


.2-jointed. Maxilla 2, plates short, rounded at apex. Maxillipeds, plates small, 


palp large. Gnathopods 1 and 2 generally similar in form, hands subchelate, 
large, with palmar tooth fortified by a spine. Peraeopod 4 the longest. 
Peraeopod 5 (Fig. 37, 38) short, 24 joint greatly expanded. Branchial vesicles 
simple. Pleopods stronger in S than in 9. Uropod 3 often varying sexually, 
outer ramus the longer, 2-jointed. Telson cleft to or nearly to the base. 


Marine. 


7 genera, 23 accepted, 7 doubtful species. 


Synopsis of genera: 
j Maxilla 1, palp 1-jointed — 2. 
\ Maxilla 1. palp 2-jointed — 5. 


Mandible, molar well developed... .. » l. Gen. Phoxocephalus . p. 134 


J 
2 \ Mandible, molar feebly developed — 8. 


Maxillipeds, 34 joint of palp with strongly 


3 | N 2. Gen. Leptophoxus . . p. 136 
Maxillipeds, 34 joint of palp with apex not 
strongly produced — 4. 

4 | Gnathopods 1 and 2 alike in size and shape 3. Gen. Paraphoxus. . . p. 137 
“-) Gnathopods 1 and 2 differing in size and shape 4. Gen. Metaphoxus. . . p.138 
N en Se er 5. Gen. Harpinia . . . . p.140 
“ \) Eyes present — 6. 

l Peraeopods3 and 4, 4thjointstrongly expanded 6. Gen. Pontharpinia . . p. 145 
6 ! Peraeopods 3 and 4, 4th joint not strongly & 

\ N a ER 7. Gen. Parharpinia. . . p. 147 


14 Phoxocephalus 


1. Gen. Phoxocephalus Stebb. 


1842 Phoxus (non Billberg 1820, Coleoptera!) (part.), Kreyer in: Naturh. Tidsskr., 
v.4 p.150 | 1842 Spinifer (non Rafinesque 1831, Mollusca! fide: L. Agassiz, Nomenel. 
zool., Moll. p.84) (part.), (Holbell in MS.) Kroyer in: Naturh. Tidsskr., v4 p.151 | 
1888 Phoxocephalus (nom. nov.), T. Stebbing in: Rep. Voy. Challenger, v.29 p.810 | 
1891 P., G. ©. Sars, Crust. Norway, v.1 p.143 | 1893. P. (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 738. 

Body compressed. Hood more or less acute. Side-plates with a few 
san: setae on lower margin, 4!" not much expanded backward, 5t" with 
hind lobe rounded. Antenna 1 shorter than antenna 2, the 
latter in d with long filiform flagellum, calceoliferous. Mandible 
with well developed molar and 24 and 34 joints of palp 
not greatly expanded.- Maxilla 1, outer plate with 7—9 spines, 
palp 1-jointed, small, with slender spines. Maxilla 2, plates 
nearly equal. Maxillipeds, outer plates scarcely larger than 
inner, fringed with curved spine-teeth, 39 joint of palp oval. 
Gnathopod 2 larger than gnathopod 1. Peraeopod 3 short, 

Fig.» 2° joint expanded. Peraeopods 3 and 4, 4" and 5% joints 
P.holbölli. not expanded. Peraeopod 5 (Fig. 37), 24 joint large, elypei- 
ae & form. Uropod 3 in ©, inner ramus unarmed, much shorter than 

Sars] outer, in © much larger than in O, both rami well developed, 

lanceolate, fringed with plumose setae. Telson,. lobes rather 
narrow, especially in C. 
3 species accepted, 4 doubtful. 


Synopsis of the accepted species: 


1 :Byen ill dtexelopet „u. aa nt 1. P.holbölli . . p.134 
| Eyes well developed — 2. 

| Gnathopod 2, 6th joint not longer than broad . . . 2. P.bassi . .'. p.136 
\ Gnathopod 2, 6th joint longer than broad. . . . . 3. P. kergueleni . p. 135 


1. P. holbölli (Kroyer) 1842 Phoxus h. (Spinifer spinosissimus + 8. flagelli- 
formis Holbell in MS.), Kreyer in: Naturh. Tidsskr., v.4 p. 151 | 1845 P.h., Kroyer 
in: Naturh. Tidsskr., ser.2 v.1 p.551 | 1876 P. holboliü, S. I. Smith (& Harger) in: Tr. 
Connect. Ac., v.3 p.29 | 1888 Phoxocephalus holbölli, T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1717 | 1891 P.h., G.O. Sars, Crust. Norway, v.1 p.144 t.49 | 1893 P.h., A. Della 
Valle in: F. Fl. Neapel, v.20 p.740 | 1853 Phoxus kroyeri, Stimpson in: Smithson. Contr., 
v.6 nr.5 .p.58. 

Body glabrous. Hood acute, triangular, postero- -antennal corners of head 
nearly quadrate. Side-plate 1 little expanded below, 1% —34 with about 10 setae 
on hinder part of lower margin, 4% angled at the emargination. Pleon segment 3, 
postero-lateral augles slightly rounded. Eyes small, nearly round, an irregular 
mass of whitish pigment without any trace of visual elements (Sars). Antenna 1, 
15? joint rather longer than 22 and 39 combined, flagellum 6-, accessory flagellum 
4-jointed. Antenna 2, penultimate joint of peduncle rather large, with 3 rows of 
spines, flagellum in Q 6-jeinted, in O with numerous joints, nearly reaching end of 
body. Gnathopods 1 and 2, 6" joint oblong oval, a little dilated distally, palm 
shorter than hind margin; gnathopod 2 only a little larger than gnathopod 1. 
'Peraeopod 3, 24 joint broader above than below. Peraeopod 4 about half the 
length of the body. Peraeopod 5 (Fig. 37), 24 joint as long as rest of limb, 
as broad as long, hind margin strongly curved, finely serrate. Uropod 3 in O, 
inner ramus scarcely half as long as outer, 24 joint of.outer less than half 
length of 1%; in S rami nearly equal, narrowly lanceolate, plumose, outer 
with 3 spines on outer margin. Telson much longer than broad, cleft to 


Phoxocephalus 135 


the base, narrowing distally, with 2 spinules and a setule on each rounded 
apex. Colour (rather variable) light buff changing to BERUSS: with opaque 
'whitish shadows. L. 7 mm. 


Arctic Ocean; North-Atlantic, North-Sea, Skagerrak, Kattegat and Baltie 
(Seandinavia, Great Britain, France, North-America). Sandy bottom, depth 38—94 m. 


2. P.bassi Stebb. 1888 P.b., Phoxus b., T.Stebbing in: Rep. Voy. Challenger, 
v.29 p.811 t.54 | 1893 Phoxocephalus b., A. Della Valle in: F. Fl. Neapel, v.20 p. 743. 


> unknown. — d. Hood with narrowly rounded apex, postero-antennal 
corners subquadrate. Side-plate 1 well expanded below, with 14 setae, 24—4th 
with about 10 setae, 4th pair nearly quadrate, but a little deeper than broad, 
5th with hind lobe little deeper than front. Pleon segment 3, postero-lateral 
angles rounded, segment 4 dorsally impressed. Eyes large, irregularly 
quadräte, dark in spirit. Antenna 1, flagellum 8-jointed, with calceoli, accessory 
flagellum 5-jointed. Antenna 2, calceoli on ultimate joint of peduncle, flagellum 
37-jointed, nearly reaching end of body. Mandible, 3 spines in spine-row, 
molar small, but strongly dentate. Maxilla 1, outer plate with 9 spines. . 
Maxillipeds, 6 spine-teeth on margin of outer plates. Gmnathopod 1, 5th joint 
triangular, nearly as long as 6th, 6th oblong, twice as long as broad, palm 
convex, only slightly oblique, the finger with a membranous cap over the 
tip. Gmathopod 2 much larger, 5tt joint small, with the 4!" forming a cup 
for- the hand or 6% joint, which is as broad as long, slightly widened at 
the palm, the palmar tooth strong. Peraeopods 1 and 2, spines at apex of 5th 
joint nearly as long as 6** joint, finger small. Peraeopods 3—5 and uropods 1—3 
nearly as in P. holbölli. Telson much longer than broad, scarcely tapering, 
cleft almost to the base, 1 spinule and 1 setule on each apex. L. 10 mm. 


Bass Strait. Surface. 


3. P. kergueleni Stebb. 1888 P. k., Phoxrus k., T. Stebbing in: Rep. Voy. 
Challenger, v.29 .p.816 t.55 | 1893 Phoxocephalus k., A. Della Valle in: F. Fl. Neapel, 
v.20 p. 742. 


Hood with tolerably acute apex. Side-plate 1 a little expanded below, 
with 5 setae on lower margin, 4! little deeper than broad, hind margin 
convex, oblique, 5t% with hind lobe much deeper than front. Pleon segment 3, 
postero-lateral angles rounded. Eyes small, distant, not dark in spirit. 
Antenna 1, flagellum 5-, accessory flagellum 3-jointed. Antenna 2, ultimate joint 
of peduncele half length of penultimate in J, more than half in oO, flagellum in © 
with 5 joints, in young © without calceoli with 15 rather stout joints. Mandible, 
E 3 spines in spine-row, molar strongly dentate, 34 joint of palp shorter than 
24 in ©, equal to it in S. Maxilla 1, outer plate apparently with only 
7 spines. Maxillipeds, outer plates with 3 spine-teeth. Gnathopod 1, 5t" joint 
much shorter than 6%, which is oblong, much broader than half the length, _ 
palm convex, slightly oblique. Gnathopod 2, 4t-and 5th joints short, side 
by side, 6'% much as in gnathopod 1, but much larger both in oO and d, 
the palm more oblique and palmar tooth stronger. Peraeopods 1 and 2, apical 
spine on 5th joint longer than 6tk joint. Peraeopod 3, 24 joint as broad 
below as above. Peraeopod 5, 24 joint very broad, longer than rest of 
limb, hind margin slightly serrate, descending below the 4" joint. Uropod 3 
in young J, inner ramus longer than 1° joint of outer, 24 joint of outer 
half length of.1%. Telson not greatly longer than broad, not cleft to the 
base but beyond the middle, with a long spine at each broad apex. L. 5 mm. 


Cumberland Bay [Kerguelen Island]. Depth 226 m. 


B. 
@ 
® 

2 5 
Bi: 
4 
E 
3 
Br: 
E 
2 
F 
. 
P=- 
E 
B 
> 


Ar > en 
a a mr 


136 Phoxocephalus, Leptophoxus 


P. erythrophthalmus (Catta) 1875 Phoxus e., Catta in: Rev. Sei. nat., ».4 
p. 163 | 1888 Phoxocephalus e., T. Stebbing in: Rep. Voy. Challenger, v».29 p. 1717. 


Differs from P. holbölli by the very perfect eyes. 


Mediterranean. 


P. geniceulatus (Stimps.) 1855 Phoxus g., Stimpson in: P. Ace. Philad., v.7 
p- 382 | 1888 Phoxocephalus g., T. Stebbing in: Rep. Voy. Challenger, v.29 p.1717 | 
1893. P. g., A. Della Valle in: F. Fl. Neapel, v. 20. p. 748. 

Rostrum long, acute. Eyes white. Antenna 1, flagellum and accessory flagellum 
equal, 10-jointed. Peraeopods 1 and 2, 4th and 5th joints dilated. Uropod 3, rami 
unequal, outer long, 3-jointed. Colour white. L. 6 mm. 


North-Pacific (Japan). 


.  P. obtusus (Stimps.) 1855 Phoxus o., Stimpson in: P. Ac. Philad., v.7 p.382| 
1888 Phoxocephalus o., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1717. 


L. 6 mm. 
North-Paeific (Japan). 


P. simplex (Bate) 1857 Phoxus kröyerii (non P. kroyeri Stimpson 1853!), 
Bate in: Ann. nat. Hist., ser.2 v. 19 p. 140 | 1857 P. simplex, Bate in: Ann. nat. Hist., 
ser.2 v.20°p.525 | 1888 Phoxocephalus s., T. Stebbing in: Rep. Voy. Challenger, v.29 
p.1717 | 1893 P.s., A. Della Valle in: F. Fl. Neapel, v.20 p.743 | 1896 P.s., A.O. 
Walker in: Ann. nat. Hist., ser. 6 v.18 p. 157. 


Plymouth Sound. 


2. Gen. Leptophoxus 0. Sars 
1891 Leptophoxus (Sp. un.: L. falcatus), G. O. Sars, Orust. Norway, v.1 p. 146. 


Body much compressed. Hood slightly carinate and deflexed at apex. 
Side-plates with a few simple setae on lower margin, 4! broad, 5tk with 
hinder lobe subtruncate. Antenna 1 much smaller than antenna 2. Antenna 2, 
peduncle stout, flagellum in © short, in S long and slender. Mandible, cutting- 
plates, spine-row and molar feebly developed, 24 and 34 joints of palp 
expanded. Maxillae 1 and 2 about as in Phoxocephalus (p. 134). Maxillipeds, 
inner plates very small, acuminate, 34 joint of palp strongly produced ät 
outer apex. Gnathopods 1 and 2, 6" joint nearly quadrangular, that of gnatho- 
pod 2 much the larger. Peraeopod 3, 24 joint much expanded. Peraeopod 4, 
except 24 joint, very slender.. Peraeopod 5, 24 joint large and elypeiform. 
Uropod 3 alike in S and O, inner ramus very small, spiniform, outer 
slender with spines but no setae. Telson as in Phoxocephalus. 


1 species. 


1. L. falcatus (O.Sars) 1871 Phoxus simplex (err., non Bate 1857!), A. Boeck 
in: Forh. Selsk. Christian., 1870 p.135 | 1876 P.s., A. Boeck, Skand. Arkt. Amphip., 
v.2 p.217 t.8 f.3 | 1882 P. falcatus, G. O. Sars in: Forh. Selsk. Christian., nr.18 p.84 | 
1888 Phoxocephalus f., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1717 | 1893 P. f., 
A. Della Valle in: F. Fl. Neapel, 0.20 p. 739 t.60 f.15, 16 | 1891 Leptophoxus f., G. O. 
Sars, Crust. Norway, v.1 p.147 t.50. 


Body very slender, especially in d. Apex of hood- hook-like.. Side- 
plates 1—3 each with 3 small setae at lower hind corner, 1° expanded 
below, 4!" as broad as deep, almost reetangular below the emargination. 
Pleon segment 3, postero-lateral angles obtuse. Eyes wanting. Antenna 1, 
18? joint thiek, much longer than 24 and 34 combined, flagellum 5-, accessory 


Slam 4 Luz 0 a u miea rd Dal Aal zus 


f 


y li aa hg re fl a Bed Ai a a tn u lee 


Leptophoxus, Paraphoxus 137 


flagellum 3-jointed. Antenna 2 in Q nearly twice as long as antenna 1, 'bent, 
flagellum 5-jointed, scarcely half length of peduncle, in C nearly as long as body. 
Maxillipeds, 34 joint of palp produced to a narrow conical process tipped 
with 4 plumose setae. Gnathopod 1, 6!" joint narrow quadrangular; gnatho- 


 pod 2, 6! joint nearly twice as large, subquadrate; in both palmar tooth 


stout. Peraeopod 3, 24 joint as broad as long, hind margin evenly rounded. 
Peraeopod 4 nearly half length of the body. Peraeopod 5, 24 joint shorter 
than rest of limb, narrower above than below, slightly serrate, as broad as 
long. Uropods 1 and 2, rami slender, unarmed. Üropod 3, inner ramus extremely 
small, outer slender, elongate, 24 joint spiniform, about half length of 1°, 
Telson cleft to the base, slightly dilated in the middle, each apex narrow. 
tipped with a spinule and setule. Colour whitish, pellueid. L. 4 mm. 


Arctic Ocean, North-Atlantic, North-Sea and Skagerrak (Norway, Bohuslän). 
Depth 56---376 m. 


3. Gen. Paraphoxus (). Sars 
1891 Paraphoxus (Sp. un.: P. oculatus), G. O. Sars, Crust. Norway, v.1 p. 148. 


Body rather stout. Hood not carinate or deflexed. Side-plates 1—4 
with several simple setae on lower margin, 4" rather broad, 5% with hind lobe 
rounded. Eyes well developed. Antennae l and 2 in Onearly equal, antenna 2 
in Cd, flagellum of moderate length, slender, calceoliferous. Mandible, cutting 
edges and spine-row well developed, molar feeble, tipped with spinules, 
palp narrow with few setae Maxilla 1, palp 1-jointed, well developed. 
Maxilla 2, inner plate smaller than outer. Maxillipeds, inner plates obtusely 
rounded at apex, 39 joint of palp not produced, 4" slender, curved. Gnatho- 
pods 1 and 2 alike in structure. Peraeopods 1—5 about as in Phoxocephalus 
(p. 134). Uropod 3 in ©, inner ramus much smaller than outer. Uropod 3 in 9 
much larger than in ©, inner ramus nearly as long as outer, both plumose. 
Telson with rather narrow lobes. . 


l species accepted, 1 incompletely described. 


l. P. oculatus (O0. Sars) 1879 Phoxus o., G. O.Sars in: Arch. Naturv. Kristian., 
v.4 p.441 | 1885 P.o., G. O. Sars in: Norske Nordhavs-Exp., ©.6 Crust. I p. 154 t. 13 
f. 4a—e | 1888 Phoxocephalus o., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1717 | 
1893 P.o., A. Della Valle in: F. Fl. Neapel, v.20 p.740 t.5 f.5; t.35 f. 19—28 | 1891 
Paraphoxus o., G. ©. Sars, Crust. Norway, v.1 p.149 t.51. 


Body more tumid in © than im Cd. Hood with rounded apex. Side-plate 1 
a little expanded distally, with about 14 setae, 2% with about 8 (Sars; 
4 and 6 in Della Valle’s figures), 4!" as broad as long, expansion evenly 
rounded. Pleon segment 3, postero-lateral angles produced in a broad 
linguiform lobe. Eyes in O small, rounded, brownish, in © very large, oblong 
oval or reniform, dark. Antenna l in 0, 1° joint as long as 2 and 3 combined, 
flagellum rather shorter than pedunele, 7-jointed, accessory flagellum 4-jointed; 
ind with a dense brush on inner side of 1° joint, flagellum subequal to peduncle, 
calceoliferous. Antenna 2 in O, flagellum 8-jointed, in S scarcely longer than 


half the body, penultimate and antepenultimate joints of peduncle densely hairy, 


ultimate with 2 calceoli, flagellum 20-jointed. Gnathopods 1 and 2, 6% joint 
oval, a little widened distally, palm shorter than the hind margin, palmar 
tooth rather short; this joint a little smaller in gnathopod 2 than in gnatho- 
podl. Peraeopods1 and 2, 7!k joint fully as loug as 6%, Peraeopod 3, 24 joint 
oblong, much longer than broad. Peraeopod 4 very slender, much longer 
than half the body. Peraeopod 5, 24 joint obliquely expanded, as long as 


138 Paraphoxus, Metaphoxus 


rest of limb, not so broad as long, hind margin distinctly serrate, over- 
lapping the 4" joint. Uropod 3 in Q, inner ramus scarcely half length of outer, 
conical, in d rami subequal, lanceolate, plumose. Telson, apices obliquely 
truncate, with 3 apical setules. Colour greyish white, semi-pellueid, or 
tending in parts to yellowish. L. © 5, 9 4 mm. 

Arectie Ocean, North-Atlantie and North-Sea (Norway, depth 38—-188 m; Jan 
Mayen; Greenland, depth 377 m; France); Mediterranean. 


P. maculatus (Chevreux) 1888 Phoxus m., Chevreux in: Bull. Soc. zool. France, 
v.13 p.40 | 1893 P. m., A. Della Valle in: F. Fl. Neapel, v.20 p.743 | 1888 Phoxo- 
cephalus m., T. Stebbing in: Rep. Voy. Challenger, v.29 p.1717 | 1899 Paraphoxus m., 
Chevreux in: C.-R. Ass. Frang., Sess. 27 v.2 p. 477. 

Perhaps identical with P. oculatus. L. 35 mm. 


North-Atlantie (lat. 46° N., long. 7° W.). 


4. Gen. Metaphoxus Bonnier 
1896 Metaphoxus (Sp. un.: M.typicus), J. Bonnier in: Ann. Univ. Lyon, v.26 p.650. 


Hood not carinate or deflexed. Side-plates I—4 with few setae on lower 
margin, 5tk with hind lobe rounded. Eyes well developed. Antennae 1 and 2 in 
O short.. Antenna 2 in C, flagellum long, slender, calceoliferous. Mandible, 
eutting edges and spine-row well developed, molar feeble, 34 joint of palp 
distally rather expanded, carrying setaee Maxilla 1, inner plate without 
setae, palp 1-jointed, linear, not very elongate. Maxilla 2, inner and outer 
plate subequal. Maxillipeds, outer plates reaching beyond inner, but not 
greatly, 3% joint of palp not apically produced. Gnathopods 1 and 2 unequal, 
differing somewhat in shape. Peraeopods 1—5 about as in Phoxocephalus 
(p. 134). Uropod 3 as in Paraphoxus (p. 137). Telson with lobes not very narrow. 


3 species. 
Synopsis of species: 


f Peraeopod 4, 4th joint much shorter than 5th ... 1. M.typicus . . . p.138 


1 \ Peraeopod 4, 4th joint not much shorter than 5th — 2. 


Gnathopods 1 and 2, palm forming acute angle 


ö | with hind margin of 6th joint . ....... 2. M. fultoni . . . p.139 
| Gnathopods 1 and 2, palm forming obtuse angle 
with hind margin of 6th joint ........ 3. M. pectinatus . p.139 


1. M. typicus Bonnier 1896 M. t., J. Bonnier in: Ann. Univ. Lyon, v. 26 
p: 630 t£. 37 £.1. 


Extremely near to M. peetinatus (p. 139). Head, postero-antennal 
angle distinet. Eyes round, small, well developed, remaining black in spirit. 
Antenna 1 in © short, flagellum 4-jointed, accessory flagellum nearly 
as long, 3-jointed.. Antenna 2, ultimate joint of peduncle shorter than 
the stout penultimate, flagellum 4-jointed. Gmathopod 1, 6*R joint oblong, 
palm slightly oblique, defined by a small tooth. Gnathopod 2 larger, distally _ 
widened, palm more convex and more oblique, defined by a considerable 
 tooth. Peraeopods 1 and 2, finger almost as long as 6th joint. Peraeopod 4, 
24 joint very convex in front, 4!" much shorter than 5th, Peraeopod 5, 24 
joint nearly as wide as length of rest of limb. Uropod 3 in ©, inner ramus 
very short, outer long, 2-jointed. Telson eleft nearly to base, lobes rather 
dehiscent near the apices, each of which has 3 spines. 1.9 a little over 5 mm. 


Bay of Biscay. Depth 950 m. 


1 
Er 
Ya 


Bar" Sa pn Are a a ae Dasiäten an u 5 2% WANT ee el Eu Fri 2 
y ı* u h f 


pe Fi TAN. 


ii eh a nk te" Eh Een zu 


TE RN ER 
ERIRELS: NE 


Metaphoxus : 139 


2. M. fultoni (T. Scott) 1890 Phoxocephalus f., T. Scott in: Rep. Fish. Board 
Seotl.. v.8 p.397 1.12 f.10—12; t.13 f.13—19 | 1892 P. f., D. Robertson in: P. nat. 
Hist. Soc. Glasgow, n. ser. v.3 p. 207 | 1896 P. f., Calman in: Tr. Irish Ac., v. 30 
p. 743 t.31 £.1,2| 1893 P. chelatus, A. Della Valle in: F. Fl. Neapel, v.20 p. 742 t.5 
£.10: t.85 £. 29-35. 

Body compressed, especially in d. Hood nearly straight, not very long. 
Side-plate 1 expanded distally, 1t—34 with 3 or 5 setae, 4th as broad 
as long, with pretty evenly rounded hind margin. Pleon segment 3, postero- 
lateral angles squarely rounded. Eyes well developed, dark, larger in Cd. 
Antenna 1 in ©, 1° joint as long as 24 and 34 combined, flagellum shorter 
than pedunele, 4-jointed, accessory flagellum 3-jointed; in JS longer, 1° joint 
with dense brush, flagellum longer than peduncle, 5- or 6-jointed with 1 or 
2 calceoli, terminal setae long, accessory flagellum 3-jointed. Antenna 2 in 
Oo about "/, longer, flagellum very short, 3-jointed; in S about as long as 
body, penultimate joint of peduncle and 2 preceding joints densely hirsute, 
ultimate joint with 1 ealceolus, flagellum about 22-jointed, ealceoliferous. 
Palp of mandible not very slender. Maxilla I, the 1-jointed palp narrow 
but rather long. Gmathopods 1 and 2, 5" joint rather longer and more 
triangular in gnathopod 1, the subquadrate 6t" joint narrower, but in both 
the front margin of this joint is shorter than’ the hind one, with which 
the oblique convex palm forms an acute angle, ‘thus tending to a chelate 
form. Peraeopods 1 and 2, apiecal spine of 5" joint sometimes shorter 
than 6! joint. Peraeopod 3 as in Paraphoxus oculatus (p. 137). Peraeo- 
pod 4 not very slender, about equal '/, length of body, hind margin of 2 joint 
a little produced, 4 joint as long as 5%. Peraeopod 5 rather longer in 
SO than in O, 24 joint as long as rest of limb, nearly as broad as long, 
overlapping 39 joint, hind margin crenate, with setules. Uropod 3 in Q short 
and stout, inner ramus half length of 1° joint of outer, in S more elongate, 
inner ramus equal to 1° joint of outer, both with long plumose setae. 


. Telson deeply eleft, lobes truncate, with 1 spinule and some’ setules. Colour 


greyish pellueid, with violet tinting on middle of back. L. 2:5 mm. 


Firth of Clyde, Firth of Forth, Menai Strait, Galway Bay; Gulf of Naples. 
From low water to 40 m. 


3. M. pectinatus (A. Walker) 1896 Phoxocephalus simplex (err.?, non Phoxus s. 
Bate 1857!). Calman in: Tr. Irish Ae., 0.30 p. 748 t.32 f.3 | 1896 P. peetinatus, A. O. 
Walker in: Ann. nat. Hist., ser.6 v.17 p.343 t.16 f. 1-6; v.18 p.156 | 1899 Meta- 
phoxus p., Chevreux in: ©.-R. Ass. Franc., Sess. 27 0.2. p. 477. 


Hood slightly deflexed at the apex, postero-antennal corners slightly 
rounded. Side-plate 1 well expanded distallv, 15°—34 with 3 or 4 simple setae 
on lower margin, 4" little deeper than broad, hind margin convex, oblique, 
5th with hind lobe much deeper than front. Pleon segment 3, postero-lateral 


- angles slightly rounded, segment 4 with 1 or 2 spinules-en dorsal tuberele (C). 


Eyes round, dark, large, especially in d. Antenna 1, 1° joint longer than 
24 and 3% combined, upper margin produced in C, flagellum 4-jointed, in 
S with 2 calceoli and ending in a long seta, accessory flagellum 3-jointed. 
Antenna 2, flagellum in Q 4-jointed, as long as the stout penultimate joint 
of peduncle, in J about */, length of body, calceolated. along with 
ultimate joint of peduncle. Mandible with spine-row, molar rudimentary 
(at least in 5), 24 joint of palp longer than 34, 34 distally expanded, carrying 
many setae. Gnathopod 1 smaller than gnathopod 2, with less oblique palm 
and less powerful palmar tooth, in both gnathopods joints 4 and 5. combining 
to form a small cup for the large 6'" joint, which in gnathopod 1 is much 


140 Metaphoxus, Harpinia 


longer than broad, a little tapering distally, while in gnathopod 2 it widens 
a little distally, with a length not much exceeding its considerable breadth. 
Peraeopods 1 and 2, 7% joint about °/, length of 6'". Peraeopod 4 nearly ?/, 
length of the body, 4!" joint as long as 5%. Peraeopod 5, 24 joint as long 
as rest of limb, not quite so broad as long, hind margin with about 3 
shallow teeth, not produced below the 4% joint, joints 3 and 4 in 9 with plumose 
setae, joint 5 m J with 3 or 4 curved blunt spines forming comb on 
distal half of front margin. Uropod 3 in Q as in Phoxocephalus holbölli 
(p. 134), in S inner ramus as long as 1° joint of outer, the latter without 
spines on outer margin. Telson as in P. holbölli. L. 3 mm. 


Firth of Clyde; English Channel (Guernsey, depth 13 m; France). 


5. Gen. Harpinia Boeck 


1842 Phoxus (part.) (Spinifer Holbell in MS., part.), Kreyer in: Naturh. Tidsskr., 
v.4 p.150 | 1871 Harpina.(non Burmeister 1844, Coleoptera!), A. Boeck in: Forh. 
Selsk. Christian., 1870 p. 135 | 1876 Harpinia, A. Boeck, Skand. Arkt. Amphip., v.2 
p.218 | 1888 H., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 819 | 1891 H., G. O. Sars, 
Crust. Norway, v.1 p.150 | 1895 H., A. Della Valle in: F. Fl. Neapel, v. 20 p. 744. 


Body rather broad. Head with evenly vaulted hood, not carinate or 

deflexed. Side-plates plumose, 4th broadly produced backward, 5t" with 

oblique hind lobe. Eyes wanting. Antenna 1, 1° joint very 

large, carrfing sensory bristles and in J densely setose, accessory 

flagellum long. Antenna 2 with many spines and setae on 

peduncle, of which the penultimate joint is broad. Primary 

flagellum not long in either antenna in either sex. No calceoli. 

Mandible with short cutting edge, denticulate accessory plate 

on left mandible, spine-row, feeble molar tipped with slender 

spines, palp slender, armed chiefly on truncate tip of long 

39 joint. Maxilla 1, 9 spines on outer plate, palp 2-jointed. 

H. Fe Maxilla 2, plates subequal. Maxillipeds, plates slender, palp 

Peraeopod 5. elongate. In J the mouth-organs are subject to degradation. 

A)  Gmathopods 1 and 2 similar, 6% joint oval, palm more or 

less oblique. Peraeopod 3, 24 joint linear. Peraeopod 4 much 

longer than the rest, 24 joint narrowed distally. Peraeopod 5 (Fig 38) rather 

small, 24 joint much expanded. Uropod 3 in © rather short, outer ramus 

the longer, with spines; in S longer, both rami knife-shaped, and as a 
rule unarmed. Telson with rounded apices. 


12 species. 


Synopsis of species: 
Pleon segment 3, postero-lateral angles acutely 


1 produced — 2. 
\ Pleon segment 3, postero-lateral angles rounded—10. 


| Peraeopod 5, 2djoint with apronounced spur (Fig.88) 1. H. mucronata. . p. 141 
Peraeopod 5,24 joint without a pronounced spur— 8. 


En nn EEE ar Er KEBSRET N 2. H. crenulata . . p. 141 
Pleon segment 3, postero-lateral corners not 


Pleon segment 3, postero-lateral eorners abruptly 
5 
abruptly upturned — 4. 


j Peraeopod 5, 2d joint deeply serrate — 5. 


+ \ Peraeopod 5, 2d joint not deeply serrate — 6. 


Harpinia 141 


Side-plates 1—3 with few setae, a tooth at lower 
ERINA-OOFHOR ET la det 3. H. pectinata . . p.142 
a Side-plates 1—3 with many setae, no tooth at E 
Jower una armer ES ee 4. H.serrata . . . p.142 
f Gnathopod 2, palm bidentate ... . 2.2... 5. H. excavata . . p.142 
\ Gnathopod 2, palm not bidentate — 7. 
Head with postero-antennal corners much produced 6. H. antennaria. . p. 143 
7 | Head with postero-antennal corners not much 
produced — 8. 
Pleon segment 3, postero-lateral corners produced 
INWSALRRAHFTODEN > a en 7. H. propinqua.. . p.143 
® Pleon segment -3, postero-lateral corners produced 
into a large tooth — 9.- 
Side-plates 1—4, setae on lower margin elose-set 
| BREINUMEFONR Se a a eye 8. H. obtusifrons . p.145 
s | Side-plates 1—4, setae on lower margin not close- s 
BBL.:0 DUMETONB FR en 9. H.plumosa. . . p. 144 
j Peraeopod 5. 24 joint with hind margin obliquely 
10 DUDORED WOW a en TE, 10. H.truncata. . . p.144 
| Peraeopod 5, 2d joint with hind margin rounded — 11 
u | Pleon segment 4 with dorsal hump . . . ... 1l. H.abyssi. . . . p.144 
Pleon segment 4 without dorsal hump . . . . . 12. H. laevis.. . . . p.145 


1. H. mucronata 0. Sars 1879 H.m., G.O.Sars in: Arch. Naturv. Kristian., 
v.4 p.446 | 1885 H. m., G. O. Sars in: Norske Nordhavs-Exp., v.6 Crust. I p. 161 t.13 
£.7, 7a—g | 1891 H. m., G. O. Sars, Crust. Norway, v.1 p.157 t.54 f.3 ! 1893 H.m., 
A. Della Valle in: F. Fl. Neapel, v.20 p. 746 t.60 £.17. 


Body rather compressed, glabrous above. Hood prominent, slightly 
convex. Side-plates 1—3 with small tooth at lower hind corner, setae few. 
Pleon segment 3, postero-lateral angles slightly upturned in long spiniform 
process. Antennae 1 and 2 comparatively slender, accessory flagellum nearly 
as long as prineipal. Gnathopods 1 and 2, palm slightly longer than hind 
margin in 6fh joint. Peraeopod 4 not very slender, scarcely more than 
half the length of the body. Peraeopod 5 (Fig. 38) very small, 24 joint 
less expanded than usual, lower hind corner carrying a strong backward- 
pointing acute spur, with a slight excavation above it and a few points of 
serration below. Uropod 3, inner ramus as long as 1° joint of outer, 24 
joint of outer not nearly half as long as 1°. Telson broader than long, 
apices very obtuse. Colour greyish white. L. © 5 mm. 


Aretie Ocean and North-Atlantie (Finmark, Greenland), North-Sea. 


- 


2. H.crenulata (Boeck) 1871 Harpina c., A. Boeck in: Forh. Selsk. Christian., 
1870 p.136 | 1876 Harpinia c., A. Boeck, Skand. Arkt. Amphip., v.2 p.221 t.8 f.2| 
1891 H. e., G. O. Sars, Crust. Norway, v.1 p.158 t.55 f.2 |] 1898 H.c. (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p. 745 | 1896 H.nana, J. Bonnier in: Ann. Univ. Lyon, 
v.26 p. 633 t.37 £.2. 


Body rather short and stout. Hood prominent. Side-plates, setae not 
numerous. Pleon segment 3, postero-lateral angles rounded, with a little 
upturned, scarcely projeeting denticle above, the margin below it sometimes 
erenulate; segments 1—3 dorsally densely hirsute; segment 4 with dorsal 
depression in d. Antenna 1, flagellum 6-jointed, accessory flagellum 5-jointed. 
Antenna 2, flagellum 5-jointed. Gnathopods 1 and 2, palm longer than hind 
margin of 6% joint, especially in the more robust gnathopod 2. Peraeopod 4 
slender, ®/, length of body. Peraeopod 5, 24 joint with expansion not 


142 Harpinia 


entirely overlapping 4 joint, hind margin in Q carrying long setae between 
about 12 points of serration, the lower ones bipartite; in d a few setules 
between 5 or 6 obseure points. Uropod 3 in O, outer ramus with 3 spines 
on outer margin of 1° joint, 24 joint not half length of 1%, inner ramus 
little more than half length of same; in G 24 joint more than half length 
of 1°, and inner ramus longer than. 1° joint of outer. Telson starcely 
broader than long, apices divergent, narrowly rounded. Colour greyish white, 
pellueid. L. about 4 mm. 

Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (Norway, depth 56— 188m; 
Bohuslän); Kattegat; Bay of Biscay, depth 950 m. 


3. H. pectinata O. Sars 1891 H.p., G. O. Sars, Crust. Norway, v.l p.154 
t.53 f.2 | 1893 H. p., A. Della Valle in: F. Fl. Neapel, v.20 p. 746. 


Body rather eompressed, glabrous above. Hood prominent, postero- - 
antennal eorners not produced. Side-plates 1—3 with small tooth at lower 
hind corner, setae few. Pleon segment 3, postero-lateral angles slightly 
upturned in rather short spiniform process. Antennae 1 and 2 comparatively 
slender. Gnathopods 1 and 2, palm about equal to hind margin in 6! joint. 
Peraeopod 4 rather slender, about half length of body. Peraeopod 5, 24 joint 
obliquely expanded, overlapping 4% joint, hind margin coarsely serrate with 
5 or 6 unequal downward directed points. Uropod 3 in © small, inner ramus 
longer than 1°t joint of outer, outer with 2 spines on outer margin, 24 joint 
half as long as 1%. Telson small, broader than long, apices very obtuse 
and divergent. Colour greyish white, pellueid. L. Q 4 mm. 


Arctic Ocean, North-Atlantie, North-Sea and Skagerrak (Norway, Bohuslän). 


4. H. serrata O.Sars 1879 H.s.,, G. 0. Sars in: Arch. Naturv. Kristian., v4 
p: 445 | 1885 H.s., G. O. Sars in: Norske Nordhavs-Exp., %.6 Crust. I p. 162 t.13 £.8, 
8a—d ! 1891 H.s., G.O. Sars, Crust. Norway, v.1 p.155 t.54 f.1| 1893 3.3, 2; Della 
Valle ih: F. Fi. Neospel, v.20 p. 747 t.60 f. 18. 


Body robust, broadly vaulted. Hood rather convex with blunted tip. 
Side-plates without tooth at lower hind corner, setae many; 1° much 
widened distally, 5" with hind lobe unusually deep. Pleon segments 1—3 
dorsally hirsute, postero-lateral angles of 3% with spiniform process slightly 
upturned. Antenna 1, 1° joint of peduncle unusually large, flagellum rather 
short, 5-jointed, accessory flagellum 4-jointed. Antenna 2 strong, flagellum 
short, 5-jointed.. Gnathopods 1 and 2, palm of 6% joint about equal to hind 
margin. Peraeopod 4 very slender, and much more than half length of 
body. Peraeopod 5, 24 joint obliquely oval, overlapping 4%, hind margin 
eut into 5 very large backward direeted points. Uropod 3 in O, inner ramus 
much shorter than 1° joint of outer, which has 4 spines on outer margin, 
the 24 joint minute with long apical setae. Telson broader than long, 
apices obtuse, not very divergent. Colour greyish white. L. Q 6 mm. 


Arctic Ocean (Jan Mayen; Norway?). 


5. H. excavata Chevreux 1887 H.e., Chevreux in: Bull. Soe. zool. France, 
v.12 p.568 | 1893 H. neglecta (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 747. 


Body elongate. Hood almost straight. Pleon segment 3, postero- 
lateral angles strongly produced, acutely curved upward. Antenna 2, 
penultimate joint of pedunele with 2 rows of strong spines. Gmnathopod 1, 6% 
joint long oval, palm erenulate, defined by a spine. Gnathopod 2, 6! joint 
more broadly oval, palm defined by a long sharp tooth, with another 


Harpinia 143 


stout and short at its middle. Peraeoped 4 long, robust, 4!" joint with 2 
very long curved apical spines, 6!" much narrower than 5*&, more than 
twice as long, finger short, straight, scarcely '/, as long as 6%, Peraeopod 5, 
24 joint finely erenulate on regularly rounded hind margin, produced scarcely 
half-way down the 34, which has very long plumose setae in front. Uropod 3 
a little shorter than the preceding. Telson cleft to the base, each half with 
2 long plumose eilia, planted vertically near the apex.- L. 6 mm. 


Bay of Biseay (about lat. 43° N.). Depth 5110 m. 


6. H. antennaria Meinert 1857 Phoxus plumosus (err., non Kroyer 1842!), 
Bate in: Ann. nat. Hist., ser.2 v.19 p.140|1862 P. p., Bate, Cat. Amphip. Brit. Mus., p. 99 
t.16 f.8 | 1876 Harpinia plumosa (part.), A. Boeck, Skand. Arkt. Amphip., v.2 p.219 t.8 
f.1| 1890 H.antennaria, Meinert in: Udb. Hauchs, v».3 p. 160 t.1 f.39—41 | 1891 
H.neglecta, G.O.Sars, Crüst. Norway, v.1 p.155 t.53 f.1 | 1893 H.n. (part.), A. Della 
Valle in: F. Fl. Neapel. v.20 p. 747 t.5 £.6; t.35 f. 1—18; t. 60 f. 19. 


Body rather compressed. Hood prominent, postero-antennal corners 
drawn out to a forward pointing process. Pleon segment 3, postero-lateral 
. angles produced, more in O than in C, acute, slightly upturned ; segments 1—3 
in O dorsally densely hirsute. Side-plates and antennae as in H. plumosa (p. 144). 
Gnathopods 1 and 2, palm longer than hind margin of 6!" joint, defined by a 
process in Q, not in d. Peraeopod 4 longer than half of body. Peraeopod 5 
short, 24 joint not overlapping whole of 4", serrate points of hind margin 
small but sharp, about 9, with setules between. Uropod 3 slender, outer 
ramus with 4 spines on outer margin, 24 joint much less than half as long as 
inner ramus and shorter than 1° joint of outer. Telson little broader than long, 
apices narrowly rounded. Colour greyish white. L. © 5 mm, J rather less. 

Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (Norway, depth 56— 282m; 
Bohuslän; Great Britain; France); Kattegat.. 


7. H. propingua O0. Sars 1891 H.propingva, G.O. Sars, Crust. Norway, v.1 
p- 156 t.54 f.2 | 1893 H. propinqua, A. Della Valle in: F. Fl. Neapel, v.20 p. 746. 


Body rather slender. Hood prominent, postero-antennal corners apparently 
quadrate. Side-plates. not densely setose. Pleon segment 3, postero-lateral 
angles acutely but minutely produced; segments 1—3 dorsally finely hirsute. 
Gnathopods 1 and 2, palm very oblique, but scarcely longer than hind margin 
of 6th joint. Peraeopod 4 about half length of the body. Peraeopod 5, 
24 joint not completely overlapping 4", hind. margin very obscurely serrate. 
Uropod 3, outer ramus with 3 spines on outer margin, 2° joint more than 
‚ half as long, inner ramus about equal 1° joint of outer. Telson rather 
short, broader than long, apices broadly rounded. L. O scarce 5 mm. 


Arctie Ocean (Jan Mayen). 


8. H. obtusifrons Stebb. 1888 H. o., T. Stebbing in: Rep. Voy. Uhallenger, 
v.29 p. 820 t.56 | 1893 H. neglecta (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.747. 


Body robust. Hood prominent, very broadly rounded at the apex. 
Side-plates with feathered setae very numerous. Pleon segment 3, postero- 
lateral angles pretty strongly upturned in a rather long acute tooth; the 
segment covered with a fine down. Antenna 1, 1° joint about twice as 
long as 24 and 3% combined, flagellum 7-jointed, accessory flagellum 5-jointed. 
Antenna 2, flagellum 8-jointed. Lower lip with small conical tooth at inner 
side of each principal lobe. Mandible, spine-row of 7—9 spines, molar 
unarmed. Maxillipeds, outer plates with about 14 spine-teeth on inner margin 


144 Harpinia 


and apex, and about 7 plumose setae on outer margin; 4% joint of palp 
with nail shorter than the base. Gnathopods 1 and 2, palm very oblique, longer 
than hind margin of 6% joint; gnathopod 2 more robust than gnathopod 1. 
Peraeopod 4 much longer than half the body, 5t% joint longer than 4th, 
6! longer than 5. Peraeopod 5, 24 joint much expanded, but longer than 
broad, only partiy overlapping 4 joint, the hind margin weakly and not 
acutely serrate. Uropod 3, outer ramus with 4 spines on outer and 2 on 
inner margin, 24 joint rather less than half length of 1°, inner ramus 
unarmed, equal 1° joint of outer. Telson about as long as broad, tapering 
to the broadly rounded scarcely dehiscent apices. L. © about 8 mm. 

Southern Indian Ocean (Kerguelen Islands). Depth 55—220 m. 

9. H. plumosa (Kroyer) 1842 Phoxus plumosus, (Holbell in 'MS) Kroyer in: 
Naturh. Tidsskr., v.4 p.152 | 1871 Harpina plumosa, A. Boeck in: Forh. Selsk. Christian., 
1870 p.135 | 1876 Harpinia p. (part.), A. Boeck, Skand. Arkt. Amphip., ©.2 p.219 t.8 
£.5 | 1891 H.p., G. O. Sars, Crust. Norway, v.1 p.151 t.52 | 1898 H.p., A. Della Valle 
in: F. Fl. Neapel, v.20 p.749 | 1853 Phoxus fusiformis, Stimpson in: Smithson. Contr., 
v.6 nr.5 p.57 | 1876 Harpina f., S.1. Smith (& Harger) in: Tr. Connect. Ac., v.3 p.29. 

.. Body moderately compressed, glabrous above. Hood slightly projecting, 
apically narrow ; postero-antennal corners nearly right-angled. Side-plates 1—5 
fringed with about 7, 6, 6, 10, 4 strong plumose setae. Pleon segment 3, 
postero-lateral angles forming long, acute, slightly upturned process. Antennal, 
1° joint of peduncle very large; flagellum 6-jointed, about kalflength of peduncle, 
accessory flagellum 5-jointed. Antenna 2, penultimate joint of peduncle 
heart-shaped, flagellum 5-jointed. Maxillipeds (in attachment with peraeon 
instead of with head, Kroyer), outer plates armed on inner margin and apex 
with 7—9 serrate spine-teeth. Gnathopods 1 and 2 nearly equal, in stk joint 
palm shorter than hind margin. Peraeopod 4 scarcely longer than half 
the body. Peraeopod 5, 24 joint subquadrate, overlapping most of 4th, 
hind margin with 3 or 4 feeble points over a well marked excavation. 
Uropod 3 very short, outer ramus with 3 'spines on outer margin, 24 joint 
more than half length of 1%, inner ramus unarmed, longer than 1°* joint 
of outer. Telson broader than long, apices obtuse. Colour pale yellow. L.o 7 mm. 

Arctic Ocean and North-Atlantie (Greenland, Spitzbergen, Nova Scotia, Kara 
Sea, Siberia, America; Norway?). 

10. H.truncata O.Sars 1891 H.t., G. ©. Sars, Crust. Norway, v.1 p.157 t.55 
f.1 | 1893 H. erenulata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 745. 

O0. Body rather robust. Hood prominent. Side-plates, setae not 
numerous. Pleon segment 3, postero-lateral angles rounded, without denticle; 
segments 1—3 densely hirsute. Antenna 1, flagellum 7-jointed, accessory 
flagellum 6-jointed. Antenna 2, flagellum 6-jointed. Gnathopods1 and 2, palm 
longer than hind margin of 6'% joint, especially in the more robust gnatho- 
pod 2. Peraeopod 4 more than half length of body, 6t% joint elongated, 
with 4 recurved feathered setae on hind margin. Peraeopod 5, 24 joint 
much expanded, hind margin little serrate and transversely truncate below. 
Uropod 3, outer ramus with 5 spines on outer margin of 1 joint, 24 very 
small, inner ramus */, length of 1° joint of outer. Telson rather longer 
than broad, apices divergent. Colour greyish white. L. 6 mm. — © unknown. 

Trondhjemsfjord, depth 188—282 m; Skagerrak (Bohuslän). 


11. H.abyssi O.Sars 1879 H.a.+ H. carinata (5), 6. O. Sars in: Arch. Naturv. 
Kristian., v.4 p. 443, 444 | 1885 H. a. + H. c., G. O. Sars in: Norske Nordhavs-Exp., v. 6 
Crust. 1 p.157 t.13 £.5, 5a—m; p.159 t.13 f.6, 6a—e | 1891 H. a., G. O.Sars, Crust. 
Norway, v.1 p.160 t.56 £.1| 1893 H.a., A. Della Valle in: F. Fl. Neapel, v. 20 p. 745. 


Ba Ba Ya a ich ce ne a ae m else 


Harpinia, Pontharpinia 145 


Q.Bodyrobust. Hood moderately prominent. Side-plates, setae numerous; 
1% much expanded distally, 5t% with deep transverse hind lobe. Pleon 
segment 3, postero-lateral angles rounded, lower edge setose; segments 1—3 
very finely hirsute; segment 4 with dorsal hump in both sexes. Antenna 1, 
1% joint twice as long as. 24 and 39 combined, flagellum short, 7-jointed, 
accessory flagellum 6-jointed. Antenna 2 scarcely as long as antenna 1, 
flagellum 6-jointed. Penultimate joint of pedunele in both antennae 1 and 2 with 
dense set of plumose setae. Gnathopods 1 and 2 not very unequal, palm very 
oblique, much longer than hind margin of 6% joint, palmar tooth almost 
obsolete. Peraeopod 4 more than half length of body, 6t% joint long and 
slender. Peraeopod 5 very small, front margin angled, setose below, hind 
margin broadly rounded, little produced downward, finely erenulate below. 
Uropod 3 not very large, 1° joint of outer ramus with 6 spines on outer 
margin, 24 joint very small, inner much shorter than 1° joint of outer. 
Telson short, broader than long, apices divergent. Colour greyish white to 
rusty yellow. — J. More slender and compressed, pleon carinate, 6!" segment 
dorsally humped as well as 4%. Antenna 1, the expanded 1° joint of 
flagellum densely setose. Peraeopod 5, 24 joint, front margin almost straight, 
hind margin nearly smooth. Uropod 3, rami rather broad, outer with 6 setules, 
24 joint minute, inner ramus nearly as long as outer. — L. 0 & 5 12mm. 


North-Atlantie (lat. 630°—75° N.). Depth 660—2288 m. 


12. H.laevis O.Sars 1891 H.l.. G.O.Sars, Crust. Norway, v.1l p.161 t.56 
f£.2 | 1893 H.1., A. Della Valle in: F. Fl. Neapel, v.20 p. 745. 

O0. Body stout, glabrous. Hood very prominent. Side-plates, setae 
very few (3). Pleon segment 3, postero-lateral angles narrowly rounded, 
lower margin quite smooth. Antennae 1 and 2 unusually slender, with few 
setae on penultimate joint of peduncle, antenna 1, flagellum 6-jointed, accessory 
flagellum 5-jointed. Antenna 2, flagellum 5-jointed. Gnathopods 1 and 2, palm 
rather oblique, subequal to hind margin of 6% joint, palmar tooth pretty 
strong. Gmnathopod 2 more robust than gnathopod 1. Peraeopod 4 less 
than half length of body. Peraeopod 5, 24 joint large, fully overlapping 
4th joint, hind margin feebly erenulate. Uropod 3, 1° joint of outer ramus 
with 1 spine on outer margin, 24 joint more than half as long, inner ramus 
longer than 1° joint of outer. Telson longer than broad, apices narrowly 
rounded. Colour greyish white, pellucid. L. 4 mm. — Ö undescribed. 

Hardangerfjord and Trondhjemsfjord. Depth 94—188 m. 


6. Gen. Pontharpinia Stebb. 


1853 Urothoe (part.), J.D. Dana in: U. S.expl. Exp., v.1311 p.920 | 1888 Phoxo- 
cephalus (part.), T. Stebbing in: Rep. Voy. Challenger, v.29 p.1717 | 1897 Pontharpinia 
(Sp. un.: P. pinguis), T. Stebbing in: Tr. Linn, Soc. London, ser.2 v.7 p. 32. 

Back broad. Hood obtuse. Eyes distinet. Antenna 1, 34 joint short, 
accessory flagellum many-jointed. Antenna 2, penultimate joint of pedunele long, 
broad, earrying setae and spines. Mandible, molar small or obsolete, palp 
long and slender, 34 joint shorter than 24. Maxilla 1, palp 2-jointed, 
Maxillipeds, outer plates short, 4! joint of palp long and slender. Gnatho- 
pods 1 and 2 similar. Peraeopods I and 2, 4tk joint longer than 5!" or 6, 
Peraeopods 3 and 4 with 24, 4th and 5th joints expanded. Peraeopod 5, 
expanded 24 joint greatiy produced. Uropod 3, rami lanceolate. Telson 
deeply cleft. 

2 accepted species, 2 uncertain. 

Das Tierreich. 21.Lief.: T.R. R. Stebbing, Amphipoda I. 10 


146 Pontharpinia 


Synopsis of accepted species: 


Peraeopod 4, 4th joint as broad as 2d .... 2.2.2... 1. P. pinguis. . p. 146 
Peraeopod 4, 4th joint narrower than 2d .... 2... 2. P.rostrata . p.146 


1. P. pinguis (Hasw.) 1880 Urothoe p., Hasweli in: P. Linn. Soc. N.S.Wales, 
v.4 p.525 t.19 f.2 | 1891 Harpinia? p., T. Stebbing in: Tr. zool. Soc. London, v. 131 
p.4 | 1897 Pontharpinia p., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.33 t.9e | 
?1893 Urothoe irrostrata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 667. 


Lower margin of side-plates and of pleon segments 1—3 more or 
less fringed with setae, pleon segment 3 serrulate above small produced 
point of postero-lateral angles. Antenna 1, flagellum in 9 9-jointed, accessory 
flagellum 7-, flagellum in 9 15-, accessory flagellum 10-jointed ; the joints apically 
oblique. Antenna 2, flagellum in  21-, in 9 10-jointed, the joints apically oblique. 
Maxilla 1, outer plate with 11 spines. Gnathopods 1 and 2 in oO, 5 joint broadly 
fusiform, 6t" widening from base, then of uniform width to the transverse palm, 
?/, length of front margin strongly setose, finger in gnathopod 1 slightly over- 
lapping palm, but not in gnathopod 2. Gnathopod 1 ind, 6 joint a little longer 
than 5tk, palm not defined, finger half as long as 6t joint; gnathopod 2, 
5th joint short, 6tR ovate, palm defined by a prominent angle, finger more than 
half as long as 6" joint. Peraeopods 3 and 4, 4 joint squarish, hind margin 
serrate, in peraeopod 4 deeply incised. Peraeopod 5, 24 joint membranous- 
looking. Uropod 1, rami slightly eurved; uropod 2, rami shorter, straight; 
uropod .3, rami (at least in C) setose. Telson as broad as long, apices 
divergent, sides (in J) setose. L. © 7°5, d 10 mm. 


South-Pacifie (New South Wales). ÜUast on beach. 


2. P. rostrata (Dana) 1853 & 55 Urothoe rostratus, J. D. Dana in: U. S. expl. 
Exp., v.1311 p. 921; t.62 f.5a—p | 1876 Phoxus r., A. Boeck, Skand. Arkt. Amphip., 
v.2 p.214 | 1880 P.batei, Haswell in: P. Linn. Soe. N.S. Wales, 0.4 p.259 t.9 £. 3 | 
1888 Phoxocephalus b. + P. rostratus, T. Stebbing in: Rep. Voy. Uhallenger, v. 29 
p.1717 | 1893 P.?b.+P.?r., A. Della Valle in: F. Fl. Neapel, v. 20 p. 748, 744. 


Hood long, straight, obtuse. Side-plate 1 distally expanded, with a 
few setae (not mentioned or figured by Dana) on lower hind corner of 1° 
to 4th; 4th proad, a little narrowed distally, hind excavation shallow. Pleon 
segment 3, postero-lateral angles squarely rounded, with setae on hind margin 
above the angle. Eyes round (Dana), long-oval (Haswell), subrotund, large, 
conspicuous. Antenna 1, 1° joint about as long as 24 and 34 combined, fagellum 
10—13 joints, accessory flagellum ?/, as long as primary, 6—10-jointed. 
Antenna 2, in © rather, in d much longer than antenna 1, penultimate joint 
of peduncle in O with numerous stout spines, in d (Dana) towards apex furnished 
with stoutreversed setae, flagellum in 9 scarcely longer than peduncle, 13-jointed, 
Ö (Dana) with 15 long slender joints carrying calceoli. Upper lip broadly 
rounded. Mandible, eutting edge sharply tridentate, spine-row of about 6 spines, 
molar very small, palp long and slender, 24 joint longest, a little curved, 
34 with setae on obliquely truncate apex. Maxilla 1, inner plate oval, with 
a few apical setae, outer plate with 9 spines, palp long, 2-jointed, the short 
1° joint faintly distinet. Maxilla 2, plates broad, subequal, inner with 4 spines 
on distal half of inner margin. Maxillipeds, outer plates scarcely reaching 
beyond 1° joint of palp, with 5 slender spines on inner margin, 24 joint 
of palp elongate, 3 with apex reaching a little beyond insertion of finger, 
finger not longer than 3% joint unless by inclusion of its apical spine. Gnatho- 
pods 1 and 2 similar, 24 rather larger than 1%, 6th joint broader than 5%, but 
scarcely if at alllonger, oblong, palm setulose, eurved, somewhat oblique, defined 


My RAN OR 


if 


Pontharpinia, Parharpinia 147 


by a spiniferous process, against which the finger impinges. Peraeopods 1 and 2, 
5th joint short, with long, stout, apical spine, 6!" with strong spines on lower half 
of hind margin, finger small. Peraeopod 3, 24 joint broadly expanded, though 
in one specimen much longer than broad; 4 joint distally broader than the 
length, subtriangular, with many spines on lower margin, 5!" narrower than 4th, 
subquadrate, almost surrounded by spines, 6% narrow, spinose, finger smooth, 
slender. Peraeopod 4, 24 joint broadly oval, with long setae on front margin, 
4th Jonger and broader than in peraeopod 3, spinose, remaining joints nearly 
as in peraeopod 3. Peraeopod 5 much shorter than peraeopod 4, 24 joint 
large, the wide expansion produced to overlap 3% and 4th joints, 4h and 
5th shorter but wider than 68, all three spinose, especially 5t", finger slender. 
Uropod 1, rami stout, 5 spines on one, 2 on the other. Uropod 2, 12 spines 
along margin of peduncle, rami short and stout. Uropod 3, rami in J long, 
subequal, plumose (Dans), i in Q outer lanceolate, plumose, with minute terminal 
joint, inner about °/, as long, feebly armed and narrower. Telson cleft 
to the base or nearly so, apices rounded, with spinule and setules on outer 
point. L. 6—9 mm. 


Sooloo Sea, Port Jackson [East-Australia]. 


P. grandis (Stimps.) 1857 Phoxus g., Stimpson in: Boston J. nat. Hist., v. 6 
p-521 | 1888 Phoxocephalus g., T. Stebbing in: Rep. Voy. Challenger, v.29 p.1717 | 1893 
P.g., A. Della Valle in: F. Fl. Neapel, v.20 p. 743. 

L. 12:5 mm. 


Entrance of San Franeisco Bay. Sandy bottom, depth 19 m. 


P. uncirostrata (Giles) 1890 Phoxus uneirostratus, G. M. Giles in: J. Asiat. 
Soc. Bengal, v.59 p.65 t.2 f.2 | 1893 Phoxocephalus u., A. Della Valle in: F. Fl. Neapel, 
v.20 p. 895. 

L. about 5 mm. 


Bay of Bengal (Seven Pagodas near Madras). Sandy bottom, depth 9-—-19 m. 


7. Gen. Parharpinia Stebb. 


1888 Phoxocephalus (part.), T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1717 | 
1899 Parharpinia (Sp. typ.: Phoxus villosus), T. Stebbing in: Ann. nat. Hist., ser. 7 
v.4 p. 207. 


Hood obtuse. Eyes distinet. Antenna 1, 34 joint short, accessory flagellum 
many-jointed. Antenna 2, penultimate joint of peduncle broad, carrying 
setae and spines. Mandible, molar small or obsolete, palp long and slender, 
34 joint longer than 24, Maxilla 1, palp 2-jointed. 'Maxillipeds, outer plates 
“elongate, fringed with serrate spines on inner margin, 4th joint of palp long and 
slender. Gnathopods 1 and 2 similar. Peraeopods Land 2, 4*h joint longer 
than 5th or 6th, Peraeopods 3 and 4 with 4th and 5th joints not expanded. 
Peraeopod 5, expanded 24 joint moderately produced. Uropod 3, rami 
lanceolate. Telson deeply cleft. 


1 species. 


1. P. villosa (Hasw.) 1880 Phoxus villosus, Haswell in: P. Linn. Soc. N.S. Wales, 
v.4 p.258 t.9 f.2a, b | 1888 Phoxocephalus v., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1717 | 1893 P. v., A. Della Valle in: F. Fl. Neapel, v.20 p.743, 744 | 1899 Phoxus v., 
Parharpinia sp. typ., T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p.207 | 1882 Phoxus 
batei (err., non Haswell 1880!), G. M. Thomson in: Tr. N. Zealand Inst., v.14 p. 232 
t.17 f.2a—e: 


10* 


148 Parharpinia, Amphilochidae 


Hood long, reaching almost end of pedunele of antenna 1. Side-plates 1—4, 
hinder half of lower margin well fringed with setae, 4" as broad as deep, 
excavation shallow. Pleon segment 3. postero-lateral corners subquadrate. 
Eyes ovate, conspicuous. Antenna 1, 1° joint as long as 24 and 34 combined, 
24 with fasciele of setae, flagellum subequal to peduncle or a little longer, 
13-jointed, accessory flagellum not much shorter, 10-jointed. Antenna 2, pen- 
ultimate joint of peduncle not greatly longer than ultimate, with long setae, 
flagellum rather longer than pedunele, 17-jointed. The long straight 34 joint of 
the mandibular palp is obliquely truncate at the apex. Palp of maxilla 1 com- 
paratively large. Outer plates of maxillipeds reach more than half-way along 
the long 24 joint of the palp and are fringed with a dozen graduated spines serrate 
on both edges. As in Pontharpinia pinguis (p. 146) the 34 joint of the palp is 
produced a little beyond the insertion of the finger, which is nearly as long as the 
34 joint, not tipped with a spine. Gnathopod 1, 5tt joint much shorter than 
the oblong oval 6%; palm very oblique, defined by a tooth with palmar 
spines. Gnathopod 2, 5tt joint about as long as 6%, which is similar to that 
of gnathopod 1, not broader (rather broader, Haswell). Peraeopods 1 and 2, 
the 5tb joint has the apieal spine nearly as long as the 6t% joint, finger 
rather short. Peraeopod 3, 24 joint not greatly expanded, more so above 
than below, 4th to 6! with spines and long setae, 4" rather shorter but 
distally wider than 5tb, 5th wider, scarcely longer, than 6". Peraeopod 4, 
24 joint strongly curved and setose in front, hind margin nearly straight. 
Peraeopod 5, 24 joint as broad as long, not produced to end of 4%, Branchial 
vesicles on gnathopod 2 and peraeopods 1—5 large. Uropod 1, peduncle 
little longer than the equal rami, of which one has 4 lateral spines,- the 
other only 1. Uropod 2, peduncle fringed with 10 outstanding spines, rami 
a little unequal. Uropod 3, rami longer than pedunele, not narrow, inner 
smooth, only a little shorter than the 2-jointed outer, which carries spines 
and setae. Telson as in Pontharpinia pinguis, the apices rounded, with setae 
at extremity of outer margin. Colour yellowish (Thomson). L. about 9—14 mm. 

Port Jackson [East-Australia]; Paterson Inlet [Stewart Island by New Zealand], 
depth 13 m. 


6. Fam. Amphilochidae 


1871 Subfam. Amphilochinae, A. Boeck in: Forh. Selsk. Christian., 1870 p. 129 | 
1876 Subfam. A., A. Boeck, Skand. Arkt. Amphip., «.2 p.430 | 1882 Amphilochidae, 
G. O. Sars in: Forh. Selsk. Christian., nr. 18 p.23 | 1888 A., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.743 | 1891 A., G. ©. Sars, Crust. Norway, v.1 p. 212. 

Body rather short and stout, pleon narrow and strongly flexed. Of 
the side-plates some and always the 4! rather or very large (Fig. 40). 
Antennae 1 and 2 rather short, seldom differing much in length, accessory 
flagellum of antenna 1 wanting or small. Upper lip apically ineised. Lower 
lip, inner lobes wanting or rudimentary. Mandible normal, except as to 
molar, which varies from feeble or obsolete to strong. Maxilla 1, inner 
plate small, palp 1- or 2-jointed. Maxilla 2 normal or degraded. Maxillipeds, 
outer plates not very large, palp long. Gnathopods 1 and 2 not very powerful. 
Peraeopods 1—5 slender. Branchial vesicles usually simple. Marsupial 
plateg often large with long setae. Uropods 1—3, rami slender. Telson 
entire, unarmed, (Fig. 39 p. 154). 

Marine. 

9 genera, 19 accepted species and 7 doubtful. 


Amphilochidae, Amphilochus 149 


Synopsis of genera: 


Side-plates 3 and 4, contiguous margins not 


1 | exactly fitting — 2. 
Side-plates 3 and 4 (Fig. 40), contiguous 
margins exactly fitting — 5. 
9 Mandible, molar small or obsolete — 3. 
Mandible, molar large and prominent — 4. 
3 I A 1. Gen. Amphilochus.. . . p. 149 
a 2. Gen. Amphilochoides . p.152 
4 Mazilla 1, palp 2-jointed ........ 3. Gen. Gitanopsis . . . - p.153 
Maxilla 1, palp l-jointed ........ 4 ten: Glitana ', ., ... ; p- 155 
Side-plates 1—4 combined in forming lateral 
5 Er e 5. Gen. Tetradeion . . . . p.157 
Side-plates 1 and 2 (Fig. 40) not forming 
eonstituents of lateral shields — 6. 
6 Mandible, molar wanting . . .». .».. 2... 6. Gen. Cyproidea . . - . p.157 
Mandible, molar developed — 7. 
- Uropod 2 not reaching so far as uropod 3 7. Gen. Stegoplax . - . . p.158 
{ Uropod 2reaching at least asfar asuropod 3 — 8. 
h Gnathopod 1, 4th joint not greatly or acutely 
4 8 eh BR 8. Gen. Peltocoxa. . .. - p. 159 
B Gnathopod 1, 4th joint greatly and acutely 
RE RE TERTERETRITER 9. Gen. Paraeyproidea . . p.160 


1. Gen. Amphilochus Bate 


1862 Amphilochus (Sp. un.: A. manudens), Bate, Cat. Amphip. Brit. Mus., p. 107 | 
1888 A., T. Stebbing in: Rep. Voy. Challenger, v.29 p.743 | 1892 A., G.O.Sars, Crust. 
Norway, v.1 p.215 | 1893 A., A. Della Valle in: F. Fl. Neapel, v.20 p. 593 | 1876 Calli- 
merus (Sp. un.: C. acudigitata), T. Stebbing in: Ann. nat. Hist., ser. 4 v.18 p. 445. 


Body rather stout. Rostrum curved acuminate, lateral angles of head 
projecting, postero-antennal corners obsolete. Side-plate 1 small, obscured, 
24 —4th Jarge and deep, 4% rather strongly emarginate behind, hind lobe of 
5th the deeper. Antennae small, peduncles rather long, flagella short. 
Antenna 1 larger in than in , without accessory flagellum. Epistome rounded 
in front. Upper lip distally ineised, lower lip without inner lobes. Mandible, 
eutting edge narrow, denticulate, accessory plate only on left mandible, 
molar feeble, 34 joint of palp rather long. Maxilla 1,.inner plate very 
small, outer probably with 7 spines, palp 2-jointed. Maxilla 2, inner plate 
broader than outer. Maxillipeds, inner plates elongate, outer of moderate size, 
palp. long, 4!" joint short. Gnathopods 1 and 2 subchelate, palm distinet, 5 
joint more or less produced, finger long; gnathopod 2 the larger. Peraeo- 
pods 1—5 slender, subequal; peraeopods 3—5, 24 joint expanded. Uropod 2, 
rami unequal, uropod 3, peduncle longer than the subequal rami. Telson 
conically tapering, entire. 


} 5 species accepted, 3 doubtful. 


N N are, 3a ln ce a DE Lay net et a et 


Synopsis of accepted species: 


Gnathopod 1, front margin of 6th joint acutely 
1 | ee 1. A. manudens . . p.150 
| Gnathopod 1, front margin of 6th joint not acutely 
produced — 2. 


mn. 7 
ir A, 
a u en > Hop 


EL EN EREE EN ae ee ne Se 


150 | Amphilochus 


palm of Om... 2. A. neapolitanus . p. 150 
Gnathopod 2, process of 5th joint not overlapping 


Gnathopod 2, process of 5th joint overlapping 
| palm of 6th — 3, 


3 Telson longer than 3 times the breadth . . . . 3. A. tenuimanus. . p.150 
Telson shorter than 3 times the breadth — 4. 

4 Mandibular palp, 34 joint longer than 2d ... 4 A.marionis .. . p.151 

Mandibular palp, 3d joint shorter than 24... 5. A.brunneus. . . p.löl 


1. A. manudens Bate 1862 A. m., Bate, Cat. Amphip. Brit. Mus., p. 107 t. 17 
f.6 | 1892 A. m., G.O. Sars, Crust. Norway, o.1 p.217 t.74 | 1893 A. m., A. Della Valle 
in: F. Fl. Neapel, «.20 p.594 t.59 f£.4 | 1871 A. manuidens, A. Boeck in: Forh. Selsk. 
Christian., 1870 p.130 | 1876 A. m., A. Boeck, Skand. Arkt. Amphip., %.2 p.432 t.11 
f.1 | 1876 A. coneinna + Callimerus acudigitata, T. Stebbing in: Ann. nat. Hist., ser. 4 
v.18 p.445 t.19 £.1—1b; p.445 t.20 f.3 | 1890 A. boeckii, Meinert in: Udb. Hauchs, 
v.3_p. 160. 


Head, rostrum longer in Ö than in 9, lateral corners ending in a sharp 
deflexed point. Side-plates deeper in O than in d, 1° subquadrate, 24 and 
34 with lower margin coarsely dentate, 4! with lower and hind margin 
denticulate. Pleon segment 3, postero-lateral angles produced, ending in small 
acute point. Eyes round, dark red. Antenna 1, 1% joint apically indented, 
a little longer than 24, 24 than 34, flagellum in 2 about 6-jointed with slender 
sensory setae, in J longer, with band-like sensory filaments. Antenna 2 in o 
subequal to antenna 1, ind much shorter, ultimate joint of peduncle shorter than 
penultimate, flagellum about halflength of peduncle. Mandible, 39 joint of palp 
as long as 1% and 24 combined. Gnathopods 1 and 2, 6" joint widening to 
convex, rather oblique, denticulate palm, front margin apically produced to an 
acute tooth, finger slender, eurved, reaching beyond the palm, proximal half of 
inner margin denticulate. In gnathopod 1, 5" joint only moderately produced, 
in the much larger gnathopod 2, narrowly produced as far as palm margin, 
which forms an angle with the hind margin. Peraeopods 3—5, 24 joint 
oval, serrulate on hind margin, largest in peraeopod 5. Uropod 3 projecting 
beyond uropods 1 and 2, rami very narrow, with scattered spinules. Telson 
scarcely more than half length of peduncle of uropod 3, quite simple, acute, 
length nearly thrice breadth. Colour brownish to reddish. L. © 5, 0 4 mm. 

Arctic Ocean, North-Atlantie, North-Sea and Skagerrak (Norway, Greenland, 
France, Great Britain); Kattegat. Depth 188 m. 


2. A. neapolitanus Della Valle 1893 A.n., A. Della Valle in: F. Fl. Neapel, 
v.20 p.595 t.29 £. 16, 17. 


Eyes maroon, retieulated with white. Gnathopods 1 and 2, front margin 
of 6% joint not produced into an apical tooth; in gnathopod 1 process of 
5th joint not reaching palm of the broad 6%; in gnathopod 2, 6th joint larger 
than in gnathopod 1, process of 5" joint overlapping the palm with a bent 
point. Other appendages in agreement with A. brunneus (p. 151). Colour 
greenish-brown in part, in part pearly white lightly flecked with green. 
L. 3—4 mm. 


Gulf of Naples. Among algae. 


3. A. tenuimanus Boeck 1871 A. t., A. Boeck in: Forh. Selsk. Christian., 
1870 p. 131 ! 1876 A. t., A. Boeck, Skand. Arkt. Amphip., e.2 p.487 t.9 f.6, 7? | 1892 
A.t., G. O. Sars, Crust. Norway, v.1 p. 218 t.75 f.1 | 1893 A.t. (part.), A. Della Valle 
in: F. Fl. Neapel, v.20 p.595 t.59 f.5. 


E 
E 
: 
7 
; 
3 
E 
k 


Amphilochus . 151 


Head, rostrum long, lateral corners projecting bluntly. Side-plate 1 
a little produced obtusely, 24—4th scarcely denticulated. Pleon segment 3, 
postero-lateral angles without any acute point. Eyes small, rounded, visual 
elements imperfectly developed, light red with whitish coating. Antenna 1 
nearly as in A. manudens (p. 150), antenna 2 comparatively shorter and 
stouter, not so long as antenna 1. Mandible, 34 joint of palp rather longer 
than 24. Gmathopods 1 and 2 smaller and less unequal than in A. manudens, 
without apical tooth, palm nearly straight, irregularly denticulate, finger 
scarcely overlapping it, process -of 5t& joint not quite reaching the palm 
even in gnathopod 2. Peraeopods as in A. manudens, but uropod 3 much 
shorter, scarcely reaching beyond uropod 1, peduncle little longer than rami, 
which are without spinules. Telson overlapping peduncle of uropod 3, more 
than thrice as long as broad, acutely tapering. Colour pale yellowish, with 
light red patches. L. Q 4 mm. 


Aretie Ocean, North-Atlantic and North-Sea (Norway, depth 188—376 m; Firth 
of Clyde). 


4. A. marionis Stebb. 1888 A. m., T. Stebbing in: Rep. Voy. Challenger, v.29 
p. 743 t.38 | 1893 A. tenwimanus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 595. 


9. Side-plate 1 with front margin semicircular, 2I—4#k with lower 
margin only slightly erenate. Pleon segment 3, postero-lateral angles forming 
a scarcely perceptible tooth; segment 6 outdrawn on either side of the telson. 
Eyes small, oval. Mandibular palp, 3 joint longer than 1% and 24 combined. 
Maxillipeds, outer plates broader than in European species, distal margin finely 
peetinate on inner and ciliated on outer part, with a simple spine between. Gnatho- 
pods 1 and 2 without apical tooth to 6" joint, otherwise nearly as in A. manudens 
(p- 150); gnathopod 2 very much larger than gnathopod 1. Peraeopods 1—5 
about as in A. manudens. Telson triangular-oval, not twice as long as broad 
L. about 3 mm. — G unknown. 


Southern Indian Ocean (Marion Island). Depth 188 m. 


5. A. brunneus Della Valle ige 4A.b., A. Della Valle in: F. Fl. Neapel, v.20 
p.596 1.4 £.5; 1.29 f. 1—15. 


Head, rostrum short, lateral corners of head obtuse. Side-plate 1 
reetangular, 24—4th (as figured) quite smooth. Eyes oval, brown. Antenna 1, 
1° joint rather shorter than 24, 34 very short, flagellum 6-jointed, shorter 


. than peduncle. Antenna 2 subequal in length to antenna 1, ultimate and 


penultimate joints of pedunele equal in length, flagellum 5-jointed. Mandible, 
34 joint of palp shorter than 24. Gnathopods 1 and 2 without apical tooth 
to the 6b joint, which widens distally rather less than in other species; 
process of the 5tk joint does not nearly reach palm; finger does not reach 
beyond palm. In gnathopod 2 the hand is moderately larger than in 
gnathopod 1, and has a straighter front margin. Peraeopods normal. Uropod 3 
the longest. Telson triangular, about °/, length of peduncle of uropod 3. 
Colour yellow brown to red. L. 4—5 mm. 


Gulf of Naples. Depth to 10 m. 


A.longimanus Üheyreux 1888 A. I., Chevreux in: Bull. Soe. zool. France, 
v.13 p.4l. 


L. 2 3 mm. 
North-Atlantie (lat. 46° N., long. 7° W.). Depth 180 m. 


152 .  Amphilochus, Amphilochoides 


A.melanops A. Walker 1894 A.m., A.O. Walker in: Rep. Brit. Ass., Meet. 63 
p. 585 | 1895 A. m., A. O. Walker in: P. Liverp. biol. Soc., v. 9 p. 298 t.18 £. 12; 
t.19 f. 13—15. 


Probably identical with A. brunneus (p. 151). L. 25 mm. 
Menai Strait, Liverpool Bay. Depth 9—19 m. 


A. oculatus H. J. Hansen 1887 A. o. H.J. Hansen in: Vid. Meddel., ser. 4 
v.9 p.89 t.3 £.2—2e | 1892 A.o., G.O.Sars, Crust. Norway, ©.1 p. 226 | 1893 A. tenwi- 
manus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 595. 

L. 4 mm. 


Davis Strait (Godthaab, depth 47 m; Sukkertoppen, depth 9—19 m). 


2. Gen. Amphilochoides,®. Sars 


1892 Amphilochoides (Sp. typ.: Amphilochus odontonyx), &. O. Sars, Crust. Norway, 
v.1 p.220 | 1893 A., A. Della Valle in: F. Fl. Neapel, v.20 p. 593. 


General form like Amphilochus (p. 149). Upper lip distally wider, less 
deeply incised. Lower lip with lobes more strongly inflexed. Mandible, 
molar obsolete, palp longer, 3 joint elongate. Maxilla 1, inner plate very 
small, outer with dentate expansion below the apical spines, palp broad, 
2-jointed. Maxilla 2, plates very small, almost unarmed. Maxillipeds, plates 
moderately broad, not elongate, palp long. Gnathopods 1 and 2 similar, 
24 much the larger, with setiferous process of 5t" joint more produced, 
6th joint almost fusiform, palm being very oblique, finger long with nodiform 
denticle in one or both of the pairs on inner margin near hinge. 


3 species. 


Synopsis of species: 
Gnathopods 1 and 2 with nodiform dentiele on 
1 | Anger 4. su ns ee RE EG 1. A. boeckii . . . p.152 
| Gnathopod 2, not gnathopod 1, with nodiform denticle 
on finger — 2. 
Pleon segment 3, postero-lateral angles not produced 
IH a WB en ed 2. A. odontonyx . p.153 
Pleon segment 3, postero-lateral angles pröduced 
into B taoih en. an nn 3. A. intermedius . p. 153 


2 


1. A. boeckii O. Sars 1892 A. odontony& (err., non Amphilochus 0. A. Boeck 
1871!), G. ©. Sars, Crust. Norway, v.1 p.221 t.75 f.2 | 1893 A. o., A. Della Valle 
in: F. Fl. Neapel, v.20 p.593 t.59 f.2,3 | 1895 A. boeckü, G. OÖ. Sars, Crust. Norway, 
v.1 p. 690. 


Head, rostrum large, much deflexed, lateral corners nearly rectangular. 
Side-plate 1 obliquely quadrate, lower front angle acute, 24 slightly denticulate. 
Pleon segment 3, postero-lateral angles produced to a distinet acute tooth. 
Eyes large, rounded oval, dark red. Antenna 1, 24 joint produced on inner 
side to acute apical process, flagellum much shorter than peduncle, about 
7-jointed, carrying setae. Antenna 2 rather longer than antenna 1, ultimate 
joint of peduncle much shorter than penultimate, flagellum much shorter than 
pedunele, 7-jointed. Gnathopod 1, process of 5tk joint not reaching palm, 
6th joint twice as long as broad, palm denticulate, as long as hind margin, 
finger with nodiform dentiele, tip much overlapping the palm. Gnathopod 2, 
process of 5tk joint reaching palm, 6! joint more than twice as long as 


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Amphilochoides, Gitanopsis 153 


broad, palm denticulate, much longer than hind margin, finger with nodiform 
denticle and slightly overlapping palm. Peraeopods 3—5, 24 joint broadly 


‚expanded, hind margin serrate. Uropod 3 scarcely reaching beyond uropod 1, 


peduncle rather longer than rami. Telson elongate, reaching beyond peduncle 
of uropod 3, with a secondary dentiele on left of acute apex. Integument 
firm, squamose. Colour yellowish, mottled with red brown spots, limbs and 
distal half of pleon tinged with dark erimson. L. © 6 mm. 


North-Atlantie and North-Sea (West-Norway). Depth 94—282 m. 


2. A. odontonyx (Boeck) 1871 Amphilochus o., A. Boeck in: Forh. Selsk. 
Christian., 1870 p.131 | 1876 A.o., A. Boeck, Skand. Arkt. Amphip., v.2 p.434 t.11 
f.3 | 1895 Amphilochoides o., G. ©. Sars, Crust. Norway, v.1 p.690 | 1892 A. pusillus, 
G. ©. Sars, Crust. Norway, v.1 p. 222 t.76 £.1. 


Head, rostrum not very large, lateral corners somewhat produced. Side- 
plate 1 bluntly rounded at front corner, 24 not expanded as in the other 
species. Pleon segment 3, postero-lateral angles not produced into a tooth, 
nearly quadrate. Eyes small, rounded. Antennae 1 and 2, flagellum 5-jointed, 
otherwise as in A. boeckii, but smaller lobe to joint 2 of antenna 1. Gnatho- 
pod 1, 6*& joint scarcely twice as long as broad, palm denticulate, straight, 
forming a distinet angle with hind margin, Bayer without nodiform dentiele, 
finely ciliated on inner margin. Gmathopod 2, process of 5{" joint reaching 
a little beyond palm, which is very oblique, forming an obtuse angle with 
the short hind margin, and is not dentieulate near the hinge, finger with 
nodiform denticle. Uropod 3 reaching a little beyond uropod 1, pedunele 
much longer than rami. Telson very long and tapering, apex tridentate. 
L. ovigerous © under 3 mm. 

Arctie Ocean (Vadsö, depth 56—113 m); North-Atlantie and North-Sea (Scotland); 
Skagerrak, Christianiafjord and Kattegat; Liverpool Bay. 


3. A.intermedius T. Scott 1896 A.i., T. Scott in: ER Fish. Board Seotl., 
0.14 p.159 t.4 8.18. 


Close to A. boeckii, but side-plate 1 RT at lower front angle. 
Gnathopod 1, palm not denticulate, but fringed with minute setae, finger 
without nodiform dentiele, gnathopod 2, 4 joint with produced bifid apex very 
conspieuous, palm quite smooth. Pleon segment 3 agroes with A. boeckii, 
not‘ with A. odontonyx. 


Firth of Forth. 


3. Gen. Gitanopsis ©. Sars 


1892 Gitanopsis, G. O. Sars, Crust. Norway, v.1 p.223 | 1893 @., A. Della Valle 
in: F. Fl. Neapel, v.20 p. 598. 


Rostrum curved. Side-plate 1 not always exceedingly small. Upper 
lip ineised at narrowed apex. Lower lip with lobes narrowed in front, deeply 
ineised on inner margin. Mandible, cutting plate dentate, accessory plate 
on left mandible, spine-row well developed, molar powerful, palp with 34 joint 
the longest. Maxilla 1, inner plate very small, outer with (7?) spines, palp 
2-jointed. Maxilla 2, well developed, inner plate broader than outer. Maxillipeds, 
inner plates narrow, long, outer reaching beyond 1° joint of rather robust and 
setose palp. Gnathopods 1 and 2 subchelate. Peraeopods 1—5, uropods 1—3 
and telson (Fig. 39 p. 154) about as in Amphilochus (p. 149). 


3 species. 
r 


154 - Gitanopsis 


Synopsis of species; 

1 [ Pleon segments 1 and 2 dorsally produced to a tooth 1. G. bispinosa . p.154 
Pleon segments 1 and 2 not dorsally produced — 2. 

9 [ Gnathopods 1 and 2 strong, very unequal . ... . 2. G.inermis . . p.154 
Gnathopods 1 and 2 weak, not very unequal . . . 3. G.aretica. . . p.155 


1. G. bispinosa (Boeck) 1871 Amphilochus b., A. Boeck in: Forh. Selsk. 
Christian., 1870 p.131 | 1876 A. bispinosus, A. Boeck, Skand, Arkt. Amphip., v.2 p.435 
t.10 f.1 | 1892 Gitanopsis bispinosa, G. O. Sars, Crust. Norway, v.1 p.224 t.76 f.2| 
1893 @. b., A. Della Valle in: F. Fl. Neapel, v.20 p.598 t.59 £.6,7. 

Head, rostrum rather short, lateral corners produced, scarcely obtuse. 
Side-plates not very large, 1°: very partially concealed, tapering to an 
obtuse denticulated point, 24 finely serrate on truncate distal margin. 
 Pleon segments 1 and 2, produced dorsally to a spiniform recurved process, 
segment 3, postero-lateral corners quadrate. Eyes rounded oval, light red. 
Antennae 1 and 2 rather long. Antenna 1, 1° joint scarcely longer than 24, 
flagellum nearly twice as long as pedunele, with 15 joints, each with fasciele of 
delicate sensory setae. Antenna 2 rather longer, slender, ultimate and pen- 
ultimate joints of peduncle subequal, flagellum 15- or 16-jointed. Gnathopods I 
and 2 rather feeble, not very unequal, 5! joint scarcely narrower than 6th, 
the lamellar setose lobe not quite reaching the palm even in gnathopod 2, 
6th joint oval, about twice as long as broad, palm convex, very oblique, not 
defined by any distinet angle, with small denticles and bristles on either 
side of it, finger hirsute. Peraeopods 1—5 slender, spinulose, in 3I—5th pairs 
2% joint well expanded, especially in peraeopod 5. Uropods 1—3, rami 
densely spinulose, uropod 3 reaching as far as uropod 1, peduncle scarcely 
longer than rami. Telson conically tapering, not reaching end of peduncle 
of uropod 3. Colour whitish, banded with light red. L. 9 55 mm. 

Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (Norway, depth 94--188 m; 
Greenland; France; Great Britain). 


2. G. inermis (0. Sars) 1882 Amphilochus i., G. O.Sars in: Forh. Selsk. Christian., 
nr.18 p.87 t.3 f.10 | 1892 Gätanopsis i., G. O. Sars, Crust. Norway, v.1 p. 225 t. 77 
f£.1} 1893 @.i., A. Della Valle in: F. Fl. Neapel, v.20 p.598 t.59 f.8. 

Head, rostrum strongly eurved, lateral corners nearly 
quadrate. Side-plate 3 very small, obliquely quadrangular, 
24 slightly expanded, distal margin rounded, coarsely 
dentate. Pleon segment 3, postero-lateral curners sub- 
- Uropods Quadrate. Eyes rather large, rounded oval. Antennae land 2 

rather short, subequal. Antenna 1, 1% and 24 joints equal, 
flagellum 6-jointed, much shorter than peduncle. Antenna 2, 
ultimate and penultimate joints of peduncle equal, flagellum 
scarcely half length of pedunele. Gnathopods 1 and 2, 
resembling those of Amphilochus (p. 149), rather powerful, 


—- Telson 


re 6% joint widening to a convex, slightly oblique, dentieulate 

. Inermis, . . . ı 

Telson and palm, which is a little overlapped by the finger. In gnatho- 
uropod 3. pod 1, process of 5th joint not very long, palm defined by 


ARE AO Bean] 2 slender spines on each side. Gnathopod 2 much larger than 


gnathopod 1, process of 5t" joint long, slender, nearly reaching palm, which 
has a dense series of small hairs. Uropod 3 scarcely reaching so far back 
as uropod 1, peduncle rather longer than the smooth rami. . Telson longer 
than peduncle of uropod 3 (Fig. 39), tapering uniformly to acute apex. 
L. 2 under 4 mm. 

Varangerfjord (Vadsö [Finmark]). Depth 38—94 m. 


Gitanopsis, Gitana 155 


3. G. arcetica O.Sars 1892 @.a., G.O.Sars, Crust.Norway, v.1 p.227 t.77f.2| 
1893 @.a., A. Della Valle in: F. Fl. Neapel, v.20 p.599 t.59 f.9. 


Head, rostrum strongly curved, lateral corners not projecting, evenly 
rounded. Side-plate 1 very partially concealed, linguiform, sliehtly indented 
at apex, 24 distinetly dentate on rounded distal margin. Pleon segment 3, 
postero-lateral angles produced, but without tooth. Eyes large, oval. Antenna 1, 
24 joint shorter than 1°, 39 shorter than 24, flagellum 10-jointed, much longer than 
peduncle. Antenna 2 longer than antenna 1, ultimate and penultimate joints of 
peduncle subequal, flagellum as long as peduncle, 14-jointed. Gnathopods land 2 
rather feeble, not very unequal, 5tk joint with process densely setose, not 
nearly reaching palm even in gnathopod 2, 6t" joint scarcely wider than 5th, 
widening to well defined, denticulate, nearly transverse palm, finger minutely 
spinulose on inner margin, overlapping palm. Peraeopods 1—5 as in 
G. bispinosa. Uropod 3 reaching as far back as uropod 1, pedunele longer 
than unarmed rami. Telson scarcely reaching beyond peduncle of uropod 3, 
conieally tapering, minutely tridentate.e L. 9 5 mm. 


Varangerfjord (Vadsö |Finmark]). 


4. Gen. Gitana Boeck 


1871 Gitana, A. Boeck in: Forh. Selsk. Christian., 1870 p. 132 | 1892 @., @. 0. 
Sars, Crust. Norway, v.1 p.228 ! 1893 @., A. Della Valle in: F. Fl. Neapel, v.20 p.589. 


Rostrum broad at base. Side-plate 1 very small, almost concealed. 
Antennae 1 and 2 rather slender. Mandible well developed, molar strong, 
34 joint of palp shorter than 24. Maxilla 1, palp 1-jointed. Maxilla 2, 
inner plate shorter and broader- than outer. Maxillipeds as in Gitanopsis 
(p. 153), but palp more elongate. Gnathopods 1 and 2 rather feeble, not 
very unequal, scarcely subchelate. Peraeopods 1—5, uropods 1—3 and telson 
about as in Amphilochus (p. 149). 


3 species. 


Synopsis of species: 


Gnathopod 2, 6th joint shorter than front margin 
of 5th — 2. 


Gnathopods 1 and 2, 5th joint distinetly produced . 2. G. abyssicola . p. 156 
Gnathopods 1 and 2, 5th joint not distinetly produced 3. G. rostrata . . p. 156 


Gnathopod 2, 6th joint longer than front margin of 5th 1. G. sarsi. . . . p.155 
! | 


1. G.sarsi Boeck 1871 @.s., A. Boeck in: Forh. Selsk. Christian., 1870 p.132| 
1876 @. s., A. Boeck, Skand. Arkt. Amphip., v.2 p.439 t.11 f.2 | 1893 @. s., Chevreux 
& E. L. Bouvier in: Ann. Sei. nat., ser. 7 v.15 p.122 | 1892 @. sarsü, G.O. Sars, Crust. 
Norway, v.1 p.228 t.78 f.1 | ?1893 @. s. (part.), A. Della Valle in: F. Fl. Neapel, v.20 
p.590 t.29 f.18—32 | 1878 Amphilochus sabrinae, T. Stebbing in: Ann. nat. Hist., 
ser.5 v.2 p.864 t.15 £.1. 


Body short and stout. Rostrum strongly curved, rather obtuse, lateral 
corners of head nearly quadrate. Side-plate 2 tapering to a rounded distal 
margin with 3 serrations in the middle, 4" pair finely serrate continuously 
round lower and much of hind margin. Pleon segment 3, postero-lateral 
angles rather produced, not dentiform in this or the other species of the 
genus. Eyes of moderate size, rounded oval, dark brown. Antenna 1, 24 joint 
slightly shorter than 1°, 34 a good deal shorter than 24, flagellum scarcely 
longer than pedunele, 7-jointed. Antenna 2 rather longer than antenna 1, 


156 Gitana 


ultimate joint of peduncle rather longer than penultimate, flagellum nearly as 
long as peduncle. Gnathopods 1 and 2 less feeble than in the other 2 species; 
5th joint in gnathopod 1 with front margin shorter than 6", produced 
setiferous hind margin equal to it; 5!" joint in gnathopod 2 with front margin 
shorter, but produced setiferous hind margin much longer than 6, which 
in both is narrowly oval, with faseicles of spinules on hind margin, finger 
rather small, hirsute on inner margin. Peraeopods 1—5 not quite so slender 
as in the other species, 24 joint in 3d—5tk pairs oval. Uropod 3 reaching 
beyond uropod 1, peduncle much longer than unarmed rami. Telson not 
reaching apex of peduncle of uropod 3, tapering to tridentate apex. Colour 
dark brown or blackish violet, the crowded spots usually in transverse bands. 
L. 9 about 3 mm. 

Aretie Ocean, North-Atlantiec, North-Sea and Skagerrak (Norway, Spitzbergen, 
France, Great Britain); Kattegat. Sublitoral. 


2. G. abyssicola O0. Sars 1892 @.a., G.O. Sars, Crust. Norway, v.1 p.229 
t. 78 f.2 | ?1898 @. sarsii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 590. 


Body short and stout. Head, rostrum shorter and less strongly curved 
than in G. sarsi (p. 155), lateral corners rather more produced. Side-plate 2 with 
only 2 serrations on the obtusely pointed tip, 4" quite smooth. Pleon 
segment 3, postero-lateral angles less produced. Eyes larger, rounder, less 
refractive, light red. Antennae 1 and 2 about as in G. sarsi, but flagellum of 
antenna 2 comparatively shorter, 6-jointed. Gmathopod 1, 5" joint little 
produced, little longer than 6"; gnathopod 2 longer and more slender than 
gnathopod 1, 5tk joint more but still not greatly produced, on both margins 
much longer than 6t% joint. Peraeopods 1—5 more slender, 24 joint of 
32 —5th pairs broader than in G. sarsi. Uropods 1—3 and telson nearly 
as in G. sarsi. Colour whitish, pellueid, with patches of light red. L. © 
nearly 5 mm. 

Aretie Ocean (Selsövik [Nordland], exactly within the polar eircle). Depth 
188-282 m. 


3. G. rostrata Boeck 1871 @.r., A. Boeck in: Forh. Selsk. Christian., 1870 
p.132 | 1876 @. r., A. Boeck, Skand. Arkt. Amphip., ©.2 p.441 t.11f.4 | 1892 G. r., G. O. 
Sars, Crust. Norway, v.1 p.230 t.79 f.1 | 1893 @.r., A. Della Valle in: F. Fl. Neapel, 
0.20 p.592 t.59 f.1. 


Body less stout. Head, rostrum slightly curved, more produced, acuminate, 
lateral corners rounded, little produced. Side-plate 2 comparatively much 
larger, all the narrowly rounded distal margin serrate, 4% seemingly a little 
serrate. Pleon segment 3, postero-lateral angles slightly produced. Eyes 
small, rounded, feebly developed, light red with whitish coating. Antenna 1, 
24 joint of peduncle longer than 1°, flagellum shorter than peduncle, 7-jointed. 
Antenna 2 much longer than antenna 1, ultimate and penultimate joints of 
peduncle subequal, flagellum about half length of peduncle. Gnathopods 1 and 2 
very slender and feeble, 5!" joint scarcely at all produced on setose hind margin, 
much longer than almost linear 6!"; gnathopod 2 rather longer than gnatho- 
pod 1. Peraeopods 1—5 very long and slender, 24 joint of 32 —5th pairs 
large and laminar. Uropod 3 rather long, but scarcely reaching beyond 
uropod 1, peduncle much longer than the unarmed rami. Telson not reaching 
apex of peduncle of uropod 3, tapering to a simple apex. Colour whitish, 
without spots, sometimes faintly tinged with red. L. © 7 mm. 

Aretie Ocean, North-Atlantie and North-Sea (West-Norway). Depth 188—377 m. 


N = IR 


Tetradeion, Cyproidea 157 


5. Gen. Tetradeion Stebb. 


1899 Tetradeion (Sp. typ.: Cyproidia erassa) (non Tetradium J. D. Dana 1846, 
Cnidaria), T. Stebbing in: Ann. nat. Hist., ser. 7 v.4 p. 207. 


Body short and stout, pleon shorter than peraeon. Head small, rostrum 
> obsolete. Side-plates 1—4 together forming a continuous shield, the confronted 
_ margins of the contiguous side-plates neatly fitting, 4% much broader than 

Ist to 34 combined, 5! much broader than deep, fitting hind emargination 
of 4th, 6th and 7th concealed. Eyes well developed. Antennae 1 and 2 small. 
Antenna 1 the stouter, without accessory flagellum. Antenna 2, penultimate joint 
of pedunele shorter than antepenultimate. Mouth-parts unknown. Gmathopods 1 
and 2 equal, similar, imperfectly subchelate, 4" and 5tk joints slightly produced. 
Peraeopods 1—5 slender, character of 24 joint unknown, but expansion 
rendered needless by the great extent of side-plate 4. Uropod 1, rami shorter 
than peduncle, subequal. Uropod 2 reaching as far back as uropod 1, rami 
a little unequal. Uropod 3 not reaching so far back as the other pairs, 
stouter, rami decidedly unequal. Telson entire oval, short. 


1 species. 


1. T. erassum (Chilton) 1885 COyproidia? erassa, Chilton in: Tr. N. Zealand 
Inst., v.15 p.80 t.3 £.1 | 1899 C©.c., Tetradeion sp. typ., T. Stebbing in: Ann. nat. Hist., 
ser. 7 v.4 p.207. 


Side-plate 1 broader than 24 or 34, but not so deep, 4" deeper than 
the rest, much broader than deep. Pleon segment 3, postero-lateral angles 
not produced. Eyes large. Antenna 1, 1° and 24 joints stout, subequal, 
24 produced into a tooth over the small stout 34, flagellum 6- or 7-jointed, 
tapering, with long sensory filaments. Antenna 2, antepenultimate joint 
much longer, ultimate rather longer than penultimate joint of peduncle, flagellum 
subequal ultimate joint of peduncle, with 4 joints, 1° the longest. Gmnatho- 
pods 1 and 2, 5tk joint bluntly produced, 6t% rather narrow, slightly tapering, 
scarcely forming a palm for the small finger. Peraeopods 1—5 subequal, finger 
small. Uropods 1 and 2, the longer ramus with 2 spinules. Uropod 3, rami 
unarmed, one shorter, the other longer than the peduncle. Telson apically 
a little narrower than at base. Colour brown. L. about 3°5 mm. 


Lyttelton Harbour [New Zealand]. 


6. Gen. Cyproidea Hasw. 


1880 Cyproidea, Haswell in: Ann. nat. Hist., ser.5 0.5 p.31 | 1880 Cyproidia 
(part.), Haswell in: P. Linn. Soe. N.S. Wales, v.4 p. 320 | 1885 C. (part.), T. Stebbing 
in: Ann. nat. Hist., ser.5 ».15 p.59 | 1888 C., Peltocoxa?, T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.513 | 1893 P. (part.), A. Della Valle in:-F. Fl. Neapel, v.20 p. 647 | 
1881 Cypridoidea, E. C. Rye in: Zool. Rec., v.16 Index p.4. 


Body short and stout. Side-plates 1 and 2 rudimentary, 3 and 4th very 
large, confronted margins closely fitting, 6% and 7tk concealed. Eyes well 
developed. Antennae 1 and 2 small. Antenna 1, peduncle rather stout, accessory 
 Nagellum wanting. Antenna 2 slender. Epistome strongly projeeting. Upper 
lip unsymmetrically bilobed. Lower lip apparently with inner lobes obsolete.. 
Mandible, eutting edge with numerous teeth, accessory plate on left mandible 
also dentate, spine-row well developed, molar wanting, palp slender, 3-jointed, 
-1°% joint not very short. Maxilla 1, inner plate with 1 spinule on rounded 
apex, outer with 7 or 8 spines, palp large, 1-jointed, Maxilla 2, inner plate 


158 Cyproidea, Stegoplax 


the broader, both short, with 2 or 3 apical spines. Maxillipeds, inner plates: 
with apical margin produced at inner angle and having a denticle at the 
outer, 2 spinules on inner surface below the apex, outer plates short, broader 
than inner, not reaching end of 1° joint of palp, with 2 apical spinules, palp 
long, 24 joint scarcely as long as 1° or 34, finger slender, curved. Gnatho- 
pod 1 subchelate, 5% joint with produced process. Gnathopod 2 complexly 
subchelate, 5!" joint forming a chela with 6®h, but not with 7, Peraeo- 
pods 1—5 slender, 24 joint not expanded. Uropods 1—3, rami slender, not 
very unequal, shorter than peduncle. Uropod 2 extending beyond uropod 3. 
Telson entire. 


1 species. 


1. C. ornata (Hasw.) 1880 C. sp. (part.), Haswell in: Ann. nat. Hist., ser.5 &.5 
p.31 | 1880 Cyproidia ornata, Haswell in: P. Linn. Soe. N.S. Wales, v.4 p.320 t.18 £.1. 


Head small, with small rostrum. Peraeon broad and deep. Pleon 
folding under, narrow, laterally angled, segment 5 very short, segment 6 
produced to a point overlapping but raised above the telson. In lateral 
view the raised point looks obtuse and the telson pointed, the true character 
as seen in dorsal view being just the reverse. Side-plate 4 much the largest, 
with rather broad but shallow excavation behind, into which side-plate 5 
neatly fits, concealing the 6% and 7, Pleon segment 3, postero-lateral 
corners subquadrate. Eyes rather small, rounded. Antenna 1, 24 joint longer 
than 1°, produced in triangular process over half the short narrow 34, flagellum 
slender, with 9 joints carrying hyaline sensory appendages, the last 3 joints 
extremely thin. Antenna 2 rather longer, gland-cone short, obtuse, ante- 
penultimate joint of peduncle comparatively long, with one margin sinuous, pen- 
ultimate jointnarrower, much longer, ultimate jointalittle shorterthan penultimate, 
but longer than the very thin 3-jointed flagellum including its apical spine. 
Projeeting edge of epistome rounded, sharp. Gmathopod 1, 24 joint narrowly 
oblong, rather abruptly widened some distance down, 34 at least as long as 4*h, 
5th triangular, hind margin setulose, inner margin and apex of process 
carrying spines, 6!" tending to oval but front nearly straight, palm long, 
scarcely defined, matched by the long finger, which has much of inner 
margin finely serrulate. Gnathopod 2, 24 joint a little widened downward, 
34 very short, but hind apex produced to a long curved narrow process, 
tipped with a spine, 4th with short process, tipped with 2 spines, 5tk with 
broad base nearly as long as 6t%, and a tapering process which reaches the 
truncate apex of oblong 6%, the short finger overlapping the serrulate 
rounded angle of the 6! and tip of 5t". Peraeopods 1—5, 24 joint long, 
and narrow, finger short; in peraeopods 1 and 2, 4% joint rather longer than 
5th or 6th, but not so in following pairs. Uropod 1, peduncle very long, 
slender, rami much shorter, equal. Uropod 2 similar to uropod 1, but shorter. 
Uropod 3, pedunele stouter than in uropods 1 and 2, outer ramus rather shorter 
than inner. Telson oblong, apex roundly truncate. Colour light pink, with 
minute brown and red dots forming a lobed pattern on the side-plates. 
L. reaching 5 mm. 


Port Jackson, Port Stephens and Watson’s Bay [East-Australia]. 


7. Gen. Stegoplax 0. Sars 


1882 Stegoplax (Sp. un.: S.longirostris), G. O. Sars in: Forh. Selsk. Christian,, 
nr.18 p.88 | 1892 S., G. ©. Sars, Crust. Norway, v.1 p. 232. 


Stegoplax, Peltocoxa 159 


Body short and stout. Head boldly rostrate. Side-plates 1 and 2 rudimentary, 
34 and 4tk very large, confronted margins closely fitting, 6!" and 7tk not con- 
cealed (Fig. 40). Eyes feebly developed. 
Antennae 1 and 2 and mouth-parts as in Cy- 
proidea (p. 157), except that the mandible has a 
well developed molar, and the maxillipeds have 
the apex of inner plates transverse, not oblique, 
and outer reaching end of 1° joint of 
palp. Gnathopods 1 and 2 subequal, similar, 
scarcely subchelate, slender, 5t joint a 
little produced. Peraeopods 1—5 slender, 
but 24 joint expanded in 4 and 5% 


pairs. Uropod 3 larger than uropod 2, Fig. Ver e 
and reaching much beyond it. Telson entire. A 
1 species. 


1. S.longirostris O. Sars 1882 8.1, G. O.Sars in: Forh. Selsk. Christian., 
nr.18 p.88 t.3 f£.11 | 1892 $.2,, G. O. Sars, Crust. Norway, v.1 p.232 t.79 f.2 | 1893. 
‚Peltocoxa I., A. Della Valle in: F. Fl. Neapel, v.20 p. 650 t.59 f£. 64, 65. 

Head, rostrum very long, slightly curved, acuminate. Side-plates 1 and 2 
concealed, 3 and 4 with the margins in a uniform curve to the emargination of 
the 4b, which almost completely receives the 5tk; 5tl deeper behind than 
in front. Pleon segment 3, postero-lateral angles rather produced backward, 
not acutely; segment 6 with 2 longitudinal ridges apically acute (Fig. 40).. 
Eyes small, rounded, 3 components, pigmentred with whitish coating. Antennal, 
1? joint as long as 24 and 3% combined, flagellum with 5 joints, 15° much the largest, 
all with long band-like sensory filaments. Antenna 2, ultimate joint of pedunele 
twice length ofpenultimate, flagellum with 4 joints, 1° much the longest. Gnatho- 
pods 1 and 2 similar, 6 joint narrow, scarcely longer than 4 and 5th combined, 
palm not distinetly defined, minutely eiliated, with 2 spinules in gnathopod 1, and 
one in the narrower gnathopod 2, 5th joint produced behind to a setiferous lobe, 
finger slender, finely spinulose on inner margin. Peraeopods 1 and 2 very slender, 
longer than the others. Peraeopods 4 and 5, 24 joint with sinuosity in hind 

margin of expansion. Uropod 3 much longer than uropod 2, peduncle longer 
than the slender unarmed rami. Telson conically triangular and flattened, 
reaching end of pedunele of uropod 3. Colour greyish white. L. © about 2 mm. 
Hardangerfjord, Trondhjemsfjord, Arctic Ocean (Lofoten Isles). Depth 282—565 m. 


8. Gen. Peltocoxa Catta 


1875 Peltocoxa (Sp. un.: P. marioni), Catta in: Rev. Sci. nat., v.4 p. 161 | 1893 
P. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 647. 

Body short and stout. Head with very small röstrum. Side-plates and 
peraeopods 1—5 nearly as in Stegoplax. Eyes well developed. Antennae land 2 
small. Antenna 'l much the stouter, with small, 1-jointed accessory flagellum, 
the prineipal flagellum having a stout 1° joint fringed with very long sensory 
filaments. Mouth-parts apparently in close agreement with those of Stegoplax, 
except that both plates of maxilla 2 are slender, and the outer plates of 
maxillipeds reach beyond 1° joint of palp. Gmathopod 1 scarcely subchelate, 
5th joint a little produced. Gnathopod 2 strongly subchelate, 5th joint very 
little produced. Uropod 1 longer than uropod 2, uropod 2 longer than 
uropod 3 and reaching beyond it. Telson entire, large, boat-shaped. 

1 species accepted, 1 doubtful. 


ME A Ka u 5 N 


160 Peltocoxa, Paracyproidea 


1. P. marioni Catta 1875 P.m., Catta in: Rev. Sci. nat., ©.4 p.161 | 1885 
Cyproidia damnoniensis, T. Stebbing in: Ann. nat. Hist., ser.5 v.15 p.59 t.2 | 1893 
Peltocoxa d. + P. marionis, A. Della Valle in: F. Fl. Neapel, v.20 p.648 t.30 f.19—32; 
t.60 £.11, 12; p. 648. 


Head, rostrum small. Side-plates and angles of pleon segment 3 as in 
Stegoplax longirostris (p.159). Eyes small, round, about 20 components, pigment 
red. Antenna 1, 1° joint as long as 24 and 34 combined, flagellum with 4 joints, 
1%? much the longest, with long band-like filaments, accessory flagellum minute, 
l-jointed. Antenna 2, ultimate and penultimate joints of peduncle subequal, 
flagellum 4-jointed, tapering. Mandible, palp of very delicate structure or wanting. 
Maxilla 1, inner plate weak, unarmed or wanting; outer plate probably armed with 
7 spines, palp rather long, though but 1-jointed. Gnathopod 1, 5tk joint slightly 
produced, 6" narrow, without distinet palm, with spinules on the hinder margin, 
finger dentieulate on inner margin. Gnathopod 2 similar to gnathopod 1, except 
that the 6tk joint widens distally to a distinet convex palm defined by a 
tooth and spinules. Peraeopods 1—3 slender, peraeopod 3 with the 4 terminal 
joints shorter than in peraeopods 1 and 2. Peraeopod 4, 24 joint with hind 
margin of expansion uniformly curved. Peraeopod 5, expansion of 24 joint 
subquadrate, produced broadly below the 34. Uropod 1, rami equal, uropods 2 
and 3, rami a little unequal. Uropod 3 smaller than uropod 2, pedunele shorter 
than the serrate rami. Telson triangular, boat-shaped, reaching apex of shorter 
ramus of uropod 3. Colour greyish with many red spots or red and purple. 
L. 2:5 mm. 

English Channel (South-Devon), Firth of Clyde, Firth of Forth, Liverpool Bay, 
Gulf of Naples. 


P. brevirostris (T. & A. Scott) 1893 COyproidia? b., T. & A. Scott in: Ann. 
nat. Hist., ser.6 v.12 p.244 t.13 | 1895 C.b., A.O. Walker in: P. Liverp. biol. Soe., 
v.9 p. 300. 

.. In agreement with P. marioni, yet without aecessory flagellum to antenna 1, 
palp of mandible rather longer, finger of gnathopods 1 and 2 not denticulate, side- 
plates 6 and 7 almost entirely concealed, and 2d joint of peraeopod 5 with acutely produced 
lower hind corner. L. about 1:5 mm. 


Moray Firth. Depth 73 m, from Filograna filograna (L.) [F. implexa Berkeley). 


9. Gen. Paracyproidea Stebb. 


1880 Cyproidia (part.), Haswell in: P. Linn. Soc. N.S.Wales, v.4 p. 320 | 1899 
Paracyproidea (Sp. typ.: Cyproidea lineata), T. Stebbing in: Ann. nat. Hist., ser. 7 0.4 p.207. 


Like Cyproidea (p. 157) in general, but mandible with well developed 
molar, maxillipeds with apex of inner plates transverse not oblique; gnatho- 
pods 1 and 2 much more slender, rather feebly subchelate, gnathopod 1 having 
the 4 joint produced along the 5t" as in Aora, gnathopod 2 with the 5t 
joint produced. Uropods 1—3 with rami subequal, much sborter than peduncle, 
1%: and 24 reaching only a little beyond 34, telson entire, very large, 
strongly compressed, extending back almost to extremity of uropods. 


1 species. 
1. P. lineata (Hasw.) 1880 Cyproidia l., Haswell in: P. Linn. Soc. N.S.Wales, 


v.4 p.321 t.18 f.2 | 1899 Cyproidea l., Paracyproidea sp. typ., T. Stebbing in: Ann. 
nat. Hist., ser. 7 v.4 p. 207. 


Head, rostrum very small. Pleon segments 5 and 6 very short, 6% not 
dorsally produced. Side-plates as in Cyproidea ornata (p. 158), but 7% perhaps a 


. 


Paracyproidea, Amphilochidarım species dubiae, Leucothoidae 161 


little exposed. Eyes very large, round, red. Antenna 1, 1° and 24 joints 
stout, 24 a little longer than 1°, produced in a tooth over the whole of 
the 34, flagellum tapering, its 7 joints smooth. Antenna 2 not longer, ante- 
penultimate joint short, ultimate and penultimate joints of peduncle not long, 
subequal, flagellum 7—9-jointed, subequal to peduncle. Mandibular palp slender, 
1° joint little shorter than 24 or 34. Gnathopod 1, 24 joint distally widened, hind 
margin very sinuous, 4% joint as long as 5%, tapering, nearly reaching apex of 5th, 
which is as long as 6'b, 6th narrowly oblong, slightly widened at short, 
eurved, sloping palm, which is overlapped by the small finger. Gnathopod 2, 
24 joint straight, 4% with transversely truncate apex, narrower but not 
shorter than 34, 5 produced along 6%", but not reaching the palm, obliquely 
truncate and inner margin carrying spines, 6% widened to the oblique, 
eurved, spinulose palm, which is shorter than the hind margin and matches 
the smooth finger. Peraeopods 1—-5, 24 joint slender. Uropods 1—3, 
peduncle long, rami short. Telson with a very narrow triangular flattened 
top, thence sloping to meet the straight lower margin, the sides being flat, 
deep and long. Colour, numerous brown dots disposed in lines on the lateral 
shields and the body. L. about 2:5 mm. 


Port Jackson [East-Australia]. 


Amphilochidarum species dubiae. 


Amphilochus squamosus G. M. Thoms. 1880 A.s., G. M. Thomson in: 
Ann. nat. Hist., ser.d ©.6 p.4 t.1 f.4,4a |! 1881 A.s., G.M. Thomson in: Tr. N. Zealand 
Inst., v.13 p.214 t.7 f.5a,b | 1893 A.? s., A. Della Valle in: F. Fl. Neapel, v.20 p.597. 


Terminal joints of maxillipeds spinous, not clawed. L. about 4 mm. 
Dunedin Harbour [New Zealand]. Depth 7—9 m. 


Probolium serratipes (Norm.) 1869 P. s., A.M. Norman in: Rep. Brit. Ass., 
Meet. 38 p. 273. 


L. about 2 mm. 
North-Atlantie (Shetland Islands). 


P. spence-batei Stebb. 1876 P.s.-b., T. Stebbing in: Ann. nat. Hist., ser. 4 
v.17 p. 344 t. 19 f. 4, 4a—c | 1888 Amphilochus? s.-b., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p. 460. 

Probably young of Gitanopsis inermis (p. 154). L. about 3 mm. 


Torbay [South-Devon]. 


7. Fam. Leucothoidae 


1852 Subfam. Leueothoinae, J. D. Dana in: Amer. J. Sei., ser.2 v.14 p.3ll| 
1856 Leucothoides, Bate (& Westwood) in: Rep. Brit. Ass., Meet.25 p.21 | 1865 Subfam. 
Leucothoina, W. Lilljeborg in: N. Acta Soc. Upsal., ser.3 v.6 nr. 1 p.18 | 1882 Leuco- 
thoidae, &. OÖ. Sars in: Forh. Selsk. Christian., nr. 18 p.27 | 1888 L., T. Stebbing in: 
Rep. Voy. Challenger, v.29 p. 771 | 1892 L., @. O. Sars, Crust. Norway, v.1 p.281. 


Antennae 1 and 2 small, not very unequal. Antenna 1 with rudimentary 
accessory flagellum. Antenna 2 the more slender. Epistome (Fig. 41 p. 163) 
‚produced in front. Lower lip without inner lobes. Mandible without molar, palp 
slender with short 39 joint. Maxilla 1, inner plate small, outer with not 
more than 7 spines, palp 1- or 2-jointed. Maxillipeds with outer plates small 

Das Tierreich. 21. Lief.: T.R.R. Stebbing, Amphipoda I. 11 


162 Leueothoidae, Seba 


or rudimentary, palp well developed, 4tk joint long. Of the gnathopods one 
or both pairs chelate. Uropods 1—3 almost or entirely- unarmed. Telson entire. 
Marine. 


8 genera, 14 accepted species and 7 doubtful. 


Synopsis of genera: 


76h joints; uropod 8 uniramous . .. . . 1.Gen. Seba ..... p. 162 
Gnathopod 1, chela formed between 5th and 
6th joints; uropod 3 biramous — 2. 
Maxillipeds, outer plates rudimentary . . . . 2. Gen. Leucothoe. . . p.163 
* | Maxillipeds, outerplates small,butwelldeveloped 3. Gen. Paraleucothoe . p.169 


| Gnathopod 1, chela formed between 6th and 


1. Gen. Seba Bate*) 


1862 Seba (Sp. un.: S. innominata), (A. Costa in MS.) Bate, Cat. Amphip. Brit. 
Mus., p.159 | 1888 S.,, T. Stebbing in: Rep. Voy. Challenger, v.29 p.782 | 1893 S., 
A. Della Valle in: F. Fl. Neapel, v.20 p.773 | 1884 Teraticum (Sp. un.: T. typicum), 
Chilton in: Tr. N. Zealand Inst., v. 16 p.257 | 1889 Grimaldia (Sp. un.: @. armata), 
Chevreux in: Bull. Soc. zool. France, v.14 p. 283. 


Antenna 1 stouter than antenna 2, both with pedunele long, flagellum 
‘short, accessory flagellum very small, 2-jointed. Upper lip with symmetrical 
slightly sinuous margin, epistome bluntly eonical. Lower lip without inner 
lobes. Mandible, eutting plate strongly dentate, accessory plate denticulate, 
smaller on right than on left, spine-row of 4 spines, molar obsolete, palp 
with 3% joint much shorter and narrower than 24. Maxilla 1, inner plate 
small, outer with 7 spines, palp 1-jointed. Maxilla 2, plates short, inner 
shorter and broader than outer. Maxillipeds, plates rather small, feebly armed, 
not rudimentary, palp well developed, 4 joint elongate. Gmathopod 1 
chelate or subchelate; gnathopod 2 chelate, 34 joint elongate; in both the 
basal part of the 6" joint much larger than the thumb. Uropod 2 not 
shorter than the others. Uropod 3 uniramous. Telson triangular, entire. 


2 species. 
Synopsis of species: 
Antenna 1, flagellum longer than peduncle; peraeopods 3—5, 


BA IE TERREOWE ee ee ae 1. 8S.innominata . p.162 
Antennal, flagellum shorter than pedunele; peraeopods83—5, r 
BETH DRSRE SR ee 2. 8. saundersii . . p.163 


1. S. innominata Bate 1862 8.i., (A. Costa in MS.?) Bate, Cat. Amphip. 
Brit. Mus., p.159 t.29 £.5. 


Peraeon segments subequal. Pleon segments L—3 with sinus above 
the postero-lateral angle, well marked in segment 3. Eyes small. Antenna 1 
nearly half as long as the body, flagellum a little longer than peduncle. 
Antenna 2 rather shorter than antenna 1, but with peduncle equally long. 
Gnathopod 1, 5tk joint as broad as 6% but only half as long, 6" with chela- 
forming process as long as finger. Gnathopod 2 similar, but rather larger, 
with 5th joint rather narrower and very much shorter than 6", Peraeopods 3—5 
(in fig.) with narrowly oval 24 joint. 

Gulf of Naples. 


*) Bate, 1862, attributes the authorship of the genus (and of the species innominata) 
probably by error to A. Costa. 


Br 
TREO NE VEBEHRN 


‘ Seba, Leucothoe 163 


2. S. saundersii Stebb. 1875 S.s., T. Stebbing in: Ann. nat. Hist., ser.4 v.15 
p.186 t.15 f.2, 2a—c | 1888 $. s., T. Stebbing in: Rep. Voy. Challenger, 0.29 p. 783 
t.49 | 1893 $.s., A. Della Valle in: F. Fl. Neapel, v.20 p.774 t.60 f.32—34 | 1884 
S. typica, Chilton in: N. Zealand J. Sei., v.2 p.230 | 1884 Teraticum typicum, Chilton 
in: Tr. N. Zealand Inst., v. 16 p.257 t.18 f. la—g | 1889 Grimaldia armata, Chevreux 
in: Bull. Soe. zool. France, v.14 p.284 f. | 1899 Seba a., Chevreux in: C.-R. Ass. Frang., 
Sess. 27 v.2 p.483. 


Side-plate 1 directed forwards, 4th not specially larger than any of the 
preceding (smaller than any in Chevreux’s fig.). Pleon segment 3, postero- 
lateral angles rounded, produced backward; segments 5 and 6 coalescent 
(Chevreux). Antenna 1, 1% joint thicker but rather shorter than 24, 34 about 
"/, length of 24, flagellum 5-jointed, accessory flagellum with 2 joints, of which 
the 24 is minute, Antenna 2, ultimate joint of pedunele shorter than penultimate, 
flagellum 3-jointed. Gmnathopods 1 and 2, 5% joint triangular, not produced, 
6 with a base which in gnathopod 1 is broad and setose on the hind 
margin, but longer, narrower, and smooth in gnathopod 2; in both produced 
so as to form with the finger a perfect chela; omathopod 1 sometimes (in 
CS?) subchelate, 6! joint being subquadrate, with the palm transverse, crenate 
near the finger hinge, hollowed in the centre, with a tooth in the hollow 
(Chilton). Peraeopods 1 and 2 slender. Peraeopods 3—5, 24 joint oval, hind 
margin most serrate in the 5°" pair; 34 pair smaller than 4 or 5th, Ur opod 1, 
rami longer than peduncle, inner rather the longer. Uropod 2 stouter, peduncle 
more nearly equal to the long, subequal rami. Uropod 3, the simple ramus longer 
than peduncle. Telson triangular oval, end blunt. L. oO 4 mm. 

Strait of Magellan (Cape Virgins, depth 100 m); Algoa Bay?, from sponges; 
South-Paeifie (New Zealand); North-Atlantic (Azores, depth 1287 m; Belle-Ile-en Mer, 
depth 180 m). 


2. Gen. Leucothoe Leach 


1793 Subgen. Gammarellus (part.), J. F.W. Herbst, Naturg. Krabben Krebse, 
v.2 p.106 | 1813/14 Leucothöe (Sp. un.: L. artieulosa), Leach in: Edinb. Ene., v. 7 
p. 403, 432 | 1826 Leucothoe, Audouin in: Deser. Egypte, v. lıv p.92 | 1840 Leucothoe, 
O0. G. Costa, Fauna Reg. Napoli, Crost., Cat. p.5 | 1888 Leucothoe, T. Stebbing in: 
Rep. Voy. Challenger, v.29 p.771 | 1892 L., G. O. Sars, Crust. Norway, v.1 p. 282 | 1893 
Leucothoe, A. Della Valle in: F. Fl. Neapel, v.20 p.651 | 1816 Zycesta (Sp. un.: L. furina), 
Savigny, Mem. An. s. Vert., v.1 p. 109. 


Side-plates 1—4 broad compared with their depth. Antenna 1 stouter 
than antenna 2, both with peduncle long, flagellum Short, accessory flagellum 
ofantenna 1 very small, 1-jointed. Epistome eonically projecting. 
Upper lip unsymmetrically bilobed (Fig. 41). Lower lip without 
inner lobes. Mandible, eutting edge strongly dentate, accessory 
plate well developed on left, very small on right, molar obsolete, 
34 joint of palp much smaller than 24. Maxilla 1, inner plate 
very small, with 1 seta, outer with 7 spines, palp 2-jointed. 
. Maxilla 2, inner plate broader than outer. Maxillipeds, inner 
plates short and broad, partly coalesced, outer very small or 
rudimentary, the inner edge of the joint carrying it being 
sharpened, palp large. Gnathopod 1 chelate between 5th and 
6 joints, 5% bulbous at base and produced into a slender Fig. 41. 
thumb, parallel to the 6th, 7th small, folding over apex of 5th, a erg 5 
Gnathopod 2 powerful, subchelate, 5!" joint setose, produced Eee ip: 
along hind margin of the large oval 6%, finger strong, 
eurving over the long oblique palm nearly to the process of 5 joint. 


11* 


164 Leueothoe 


Peraeopods 3—5 subequal and similar. Uropod 2 much the shortest. 
Uropod 3, peduncle long, rami lanceolate, minutely spinulose., Telson 
triangular, long, unarmed. 

Frequently lodged in tunicates or sponges. 

11 species accepted, 7 doubtful, 


Synopsis of accepted species: i 
Gnathopod 1, finger serrate . . . . . EEE p- 164 


„ | Gnathopod 1, finger smooth — 2. 

2 Antenna 1 in S, basal joint very tumid . . . 2. IL. pachycera . . . p.164 
Antenna 1 in d, basal joint not very tumid — 38. 

3 Mandibular palp extremely short... .... . 8. L. miersi. » .. . p. 165 
Mandibular palp moderately short — 4. 
Pleon segment 3, postero-lateral -angles not 

4 ineised — 5. 
Pleon segment3, postero-lateral anglesineised — 9. 

5 Antenna 1, 34 joint not half length of 24 — 6. 
Antenna 1, 34 joint half length of 24 — 8, 

6 Gnathopod 2, 6th joint irregularly dentieulate. 4. L. furina. ... . p. 165 
Gnathopod 2, 6th joint regularly dentieulate — 7. 

7 BE ER RE 5. L.spinicarpa . . p.165 
rs black EHER RER .. .. 6. IL. commensalis . p. 166 

8 Gnathopod 1, 6th joint widest at base . 7. L.tridens . . . . p.166 
Gnathopod 1, 6th joint narrowest at base. . . 8. L. brevidigitata . p. 167 

9 Gnathopod 1, 5th joint, inner margin smooth . 9. IL. richiardii . . . p. 167 

Gnathopod 1, 5th joint, inner margin serrate — 10. 

10 Telson twice as long as broad. . . . 2...» 10. Lines 28 55% p- 167 

Telson not twice as long as broad. .... . 11. L. illjeborgii. . . p. 167 


1. L. traillii G. M. Thoms. 1882 L.t., G. M. Thomson in: Tr. N. Zealand Inst., 
v.14 p. 234 t.18 f. 1a—d | 1893 L. spinicarpa (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p. 652. 


Body rather slender. Eyes rounded, large. Antenna 1, 1° joint stout, 
24 subequal, slender, flagellum 4-jointed (?). Antenna 2, peduncle rather longer 
than that ofantenna 1, flagellum 5-jointed, shorter than ultimate joint of peduncle. 
Mandibular palp very slender. Gnathopod 1, process of 5tk joint about ?/, length 
of 6% joint, apex acute, finger curved, about "/, length of 6% joint, inner 
margin finely serrate. Gnathopod 2, 5! joint produced to ?/, length of 6% 
and ending in a curved spine, 6tk Jarge, oval, with numerous dentations, 
finger half as long. Peraeopods slender, 3—5 with 24 joint wide, crenate 
on hind margin. Uropods 1—3, rami narrowly lanceolate; nearly smooth. 
Telson narrow, tapering to a subacute, entire apex. Integument rather thin, 
semi-transparent. L. 9 mm. 


Port Pegasus and Paterson Inlet [New Zealand]. Depth 9—18 m. 


2. L. pachycera Della Valle 1893 L.p., A. Della Valle in: F. Fl. Neapel, v.20 
p.651 t. 19 £.22, 23, 2934. 


Pleon segment 2, postero-lateral angles not acute, in segment 3 incised, 
with upturned acute angle. Antenna 1 in J, 1° joint very tumid, ellipsoidal, 
24 widening from narrow base, distally truncate, flagellum 7-jointed. Antenna 2 
slender, flagellum 5-jointed. Gnathopod 1, process of 5th joint irregularly 
serrate, uncinate at apex. Gnathopod 2, 24 joint narrow at base, 6!" elongate, 


Leucothoe 165 


with irregular outline, finger large. Telson very short, not twice as long 
as broad, ending only subaeutely. Colour pearl-grey, a little interspersed 
with greenish-yellow, with flecks of crimson on the sides and smaller ones 
on the back. L. 3—4 mm. 


. Gulf of Naples. Depth 10—12 m, in sand. 


3. L. miersi Stebb. 1888 L.m., T. Stebbing in: Rep. Voy. Challenger, v.29 
"pP. 772 t.46 | 1893 L. spinicarpa (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 652. 


Nearly allied to L. spinicarpa. Side-plate 3 tending to oblong. Antenna 1, 
flagellum longer than 24 and 34 joints of peduncle combined, 17—21-jointed, 


aecessory flagellum rudimentary, 1-jointed. Antenna 2, ultimate joint of pedunele 


Me a an. 


Bari u = Zu al ya > a Zu 


A al PD 


7 


much more than half length of penultimate, flagellum 12-jointed. Mandible 
with accessory plate on both mandibles multidentieulate, that on the right 
much the smaller, spine-row of about 30 spines, 34 joint of palp only about 
"/, length of 2%. Gmathopod 1, inner margin of process of 5*" joint minutely 
tubereulate. Gnathopod 2, palmar margin serrate more and more deeply as 
it approaches the finger hinge, close to which the serration is minute. 
Peraeopods 3—5, oval 24 joint almost imperceptibly serrate on hind margin. 
 Uropod 3, rami little more than half as long as peduncle. Telson thrice 
as long as broad, tapering gradually till near the acute apex, then more 
rapidly. L. 12 mm. 


Southern Indian Ocean (Cape Agulhas). Depth 274 m. 


4. L. furina (Sav.) 1816 Lycesta f., Savigny, M&m. An. s. Vert., v.1 p.109 
t.4 f£.2| 1826 L.f., Audouin in: Deser. Egypte, v.lıv p.92; Crust. t.11 f.2 | 1855 
Leucothoe f., W.Liljeborg in: Öfv. Ak. Förh., v.12 p.128 | 1857 L. procera, Bate in: 
Ann. nat. Hist., ser. 2 0.19 p. 146 | 1893 L. spinicarpa (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 652. 


Pleon segment 3, postero-lateral angles slightly rounded, almost quadrate. 
Eyes irregularly oval. Antenna 1, 1% and 24 joints long, subequal, 34 fully 
"/, length of 2%, flagellum 8-jointed. Antenna 2, ultimate joint of peduncle not 
much shorter than penultimate, flagellum 4-jointed. Gnathopod 2, 5th joint 
apically much widened and emarginate, 6% strikingly narrowed to the finger- 
hinge, near to which it has a small sharp notch and a deeper one in the 
almost straight palm margin. L. 8 mm. 


Mediterranean (Egypt), North-Sea (Banff). 


5. L. spinicarpa (Abildg.) 1789 Gammarus spinicarpus, Abildgaard in: O.F. 
Müller, Zool. Dan., ed.3 v.3 p.66 t.119 f.1—4 | 1793 Cancer (Gammarellus) s., J. F.W. 
Herbst. Naturg. Krabben Krebse, ».2 p. 135 t. 36 f.6, 7 | 1861 G@ammarus s., Leucothoe 
articulosa, A. Boeck in: Forh. Skand. Naturf., Mode 8 p. 654 | 1892 L. spinicarpa, L. a. 
(err.), G. O. Sars, Crust. Norway, v.1 p.283 t.100; t.101 f.1|?1893 L. s. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 652 t.6 f.4; t.19 f.1—20 | 1804 Cancer 
articulosus, Montagu in: Tr. Linn. Soe. London, ®.7 p.70 1.6 f.6 | 1812 Astacus a., 
Pennant, Brit. Zool., ed.5 v.4 p.36 | 1813/14 Leucothöe articulosa, Leach in: Edinb. 
Ene., 0.7 p.403 | 1818 Gammarus articulosus, Lamarck, Hist. An. s. Vert., v.5 p.181 | 
1838 G.a., „Leucothoe“ (part.)?, H. Milne Edwards in: Lamarck, Hist. An. s. Vert., 
ed.2 v.5 p.311 | 1826 Leucotho& articulata (err.), Audouin in: Deser. Egypte, v. lıv 
p- 92 | ?1851 L. denticulata, A. Costa, Fauna Reg. Napoli, fasc. April 1851 t.9 £.3. 


Body slender, back broadly rounded. Side-plate 1 somewhat expanded 
distally, front corner transversely truncate, 24 broader than deep, 34 tending 
to semieircular, 4! with lower front angle rounded and upper hind one a 
little blunted. Pleon segment 3, postero-lateral corners quadrate, with 
minutely produced point. Eyes oval, bright red. Antenna 1 scarcely '/, length 


166 Leueothoe 


of body, 1°t joint with acute apical process, 24 narrower, subequal, flagellum 
about 16-jointed. Antenna 2 more slender, little shorter, ultimate joint ofpedunele 
about or a little more than half length of penultimate, flagellum 9-jointed. 
Mandible, 34 joint of palp more than '/, length of 24. Gmathopod 1, process 
of 5 joint spiniform, inner margin "quite smooth, apex slightly eurved, 
6th joint parallel-sided, inner margin finely serrate, and with a row of eurved 
setules, finger about half its length, slender, curved. Gnathopod 2, process 
of 5th joint densely setose, apex serrulate, gt joint massive, oval, with acute 
setose apex in front, palm convex, minutely serrate; rather more strongly 
near the hinge of finger. Peraeopods 1—5 subequal, marginal spinules short, 
finger small. Peraeopod 5, the oval 24 joint more distinetly serrate than 
in 34 and 4b pairs. Uropod 3, rami much more than half length of peduncle. 
Telson thrice as long as broad, uniformly tapering to acute apex. Colour 
BR flesh-colour with darker transverse bands; ova in pouch EURE 
L. 9 14, 5 18. mm. 
Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (Greenland; N 


depth 56—282 m; British Isles; Azores; France); Kattegat; Mediterranean? Sometimes 
in Ascidians. 


6. L. commensalis Hasw. 1880 L.c., Haswell in: P. Linn. Soe. N.S.Wales, 
v.4 p.261 t.10 f.3 | 1884 L. spinicarpa var., Miers in: Rep. Voy. Alert, p. 312 | 1885 
L.s. var., Haswell in: P. Linn. Soc. N.S.Wales, v.10 p.101 | 1893 L. s. (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p. 653. 


Close to L. spinicarpa (p. 165). Eyes black. Antenna 1 '/, longer than 
antenna 2. Maxillipeds, inner plates less broadly truncate, rudimentary outer 
plates smaller, 1°t joint of palp more produced on the outer side. Peraeopods of 
varying slenderness; peraeopod 5 has the 24 joint very broadly oval, the hind 
margin very convex to the middle or a little below it and then obliquely truncate, 
the same form of margin being indicated also in peraeopods 3 and 4. 
Apex of telson moderately acute. Colour varying, brick-red or greenish, 
sometimes: light pink with innumerable minute crimson dots. L. reaching 
to 12—14 mm. 


South-Paeifie (New South Wales). In Sponges, Ascidians and other positions. 


7. L. tridens Stebb. 1888 L.t., T. Stebbing in: Rep. Voy. Challenger, v. 29 
p. 777 t.47 | 1893 L. spinicarpa (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 653. 


Side-plate 1 produced forward below, 2% much broader than deep, 
4th foursided, broader below than above. Pleon segment 3, postero-lateral 
corners quadrate. Eyes round-oval, dark. Antenna 1, 1° joint with small 
apical tooth, 34 half length of 24, flagellum very short, accessory flagellum 
shorter than the very short 1° joint of flagellum. Antenna 2, ultimate joint of 
pedunele nearly °/, length of penultimate, flagellum of 6 slender joints. 
Mandible, eutting plates as in L. miersi (p. 165), spines of spine-row fewer, 34 joint 
of palp rather more than half length of 24. Maxillipeds, outer plates minutely 
rudimentary. Gnathopod 1, process of 5% joint smooth on inner margin, 
apex curving round quite to hinge of finger, 6" joint rather broader at base 
than apex, inner margin finely serrate, finger about '/, length of 6!% joint. 
Gmathopod 2, apex of 5tk joint eut into 5 denticles, 6 joint broadly oval, 
with no outer apical process, palm with 3 little teeth near hinge of finger, 
rest of serration mieroscopie. Peraeopods 1—5, armature slight, finger not 


very small. Telson scarcely twice as long as broad, apex a little obtuse. 
L. 5 mm. 


South-Pacifice (New Zealand). Depth 2000 m. N 


Leueothoe 167 


8. L. brevidigitata Miers 1884 L. b., Miers in: Rep. Voy. Alert, p.313 t. 34 
f£.A | 1888 L. flindersi, T. Stebbing in: Rep. Voy. Challenger, v.29 p. 779 t. 48. 


Side-plate 1 expanded below, scarcely produced forward, 24 not broader 
than long, 4" rotundo-quadrate. Pleon segment 3, postero-lateral angles 
not acute or ineised. Eyes oval. Antenna 1, 1° joint longer than 24, 
3% more than half length of 24, accessory flagellum not longer than broad. 
Antenna 2, ultimate joint of peduncle a little shorter than penultimate, flagellum 
4-jointed. Upper lip, the narrow lobe very short. Mandible, 10 spines in 
spine-row, 24 joint of palp robust, 3 narrow, half as long as 24. Maxillipeds, 
inner plates longer than in other species, outer very small, 4!" joint of palp 
with a long nail. Gmathopod 1, 24 joint moderately dilated, 5t" scarcely 
bulbous at base, broadly tapering to a slightly eurved apex, with a row of 
setae on the hind margin, 6% joint extremely narrow at base, then narrowly 
oval, finger extremely small. Gnathopod 2, 5% joint very short and produced 
‚along the hind margin of 6!" for less than half its length; 6% joint widest 
distally, without apical process, palm flat, tuberculate, very long, but convex 
‚and less elongate than usual in small specimens. Peraeopod 3, 2° joint 
with hind margin smooth, whereas in peraeopod 4 it is serrate. Telson not 
twice as long as broad, apex a little obtuse. L. 4—16 mm. 


Torres Strait (Thursday Island, Flinders Passage). Depth 13—15 m, coral mud. 


9. L. riehiardii Mich. Lessona 1865 L.r., Mich. Lessona in: Atti Soc. Ital., 
v.8 p.426 | 1893 L.r., A. Della Valle in: F. Fl. Neapel, v.20°p.654 t.3 £.4; t.19 £.21. 


Agreeing almost entirely with L. spinicarpa (p. 165); differs in having 
a small ineision at the postero-lateral corners of pleon segment 3, and in 
colour; on peraeon brilliant alternating bands of red and orange, on pleon 
segments 1—3 large red spots in rows; the small, circular eyes pale red; 
antennae are red, with a white spot at apex of 24 joint of antenna 1 and 
of ultimate and penultimate joints of peduncle of antenna 2; side-plate 4 bright 
red; gnathopod 2 particoloured, red and yellow; uropod reddish. L. 6—7 mm. 


Mediterranean (Genoa, Naples). 


10. L. incisa D. Roberts. 1888 L. furina (err., non Lycesta f. Savigny 1816)), 
Chevreux in: Bull. Soc. Etud. Paris, v. 11 p. (9) | 1892 L. ineisa, D. Robertson in: 
P. nat. Hist. Soc. Glasgow, n. ser. v.3 p. 217. 


Near to L. lilljeborgii, but side-plate 4 with front angle rounded, 
not acute; gnathopod 1, 5!" joint with tip of process strongly hooked, 
inner margin of 6" joint faintly erenulate, finger not very small; gnathopod 2, 
palm convex, faintly but broadly erenulate, finger not abruptly bent at the 
base; telson fully twiee as long as broad, apex almost acute. As in 
L. lilljeborgii, postero-lateral angles of pleon segment 3 are sharply upturned 
forming a sinus, and pleon segment 2 shows a similar tendeney. Also in 
gnathopod 1, inner margin ‚of 5tk joint is serrate. Mandible, 34 joint of palp 
not much shorter than 24. L. 7 mm. 

North-Atlantie (France; Firth of Clyde, low water and at 38 m). 


11. L. lilljeborgii Boeck 1855 L. articulosa (err., non Leach 1813/14!), W. Lilje- 
borg in: Öfv. Ak. Förh., 0.12 p.126 | 1861 L. lilljeborgii, A. Boeck in: Forh. Skand. 
Naturf., Mode 8 p. 654 | 1892 L.1;, G. O. Sars, Crust. Norway, v.1 p. 284 t. 101 f.2| 
1889 L. imparicornis, A. M. Norman in: Ann. nat. Hist., ser. 6 v.4 p. 114 t.10 f.1—4| 
1893 L. serraticarpa, L.lilljeborgii, A. Della Valle in: F, Fl. Neapel, v.20 p. 656 t.19 
f. 24—28; p. 908. 


168 Leueothoe 


Side-plate 1 slightly widened below, 2% broader than long, 4" pentagonal, 
with lower front angle acute. Pleon segment 3, postero-lateral angles acutely 
upturned forming a sinus. Eyes rounded triangular, dark brownish. Antenna 1 
much larger than antenna 2, 1° joint without apical process, as long as 24, 
flagella 9-jointed. Antenna 2 slender, ultimate joint of peduncle not much shorter 
than penultimate, flagellum 7- or 8-jointed. Gmathopod 1, 24 joint densely 
setose on both margins, 5!" dilated at base, process not very slender, inner 
margin serrate, apex a little bent, 6% narrow, inner margin smooth, finger 
/, length of 6!" joint. Gmathopod 2, 5 joint tridentate at apex, 6% tapering 
distally, palm very oblique, its edge quite smooth and nearly straight, 
finger abruptly bent at base. Peraeopods 1—5 very slender, 6! joint elongate. 
Uropod 3, rami nearly as long as peduncle. Telson triangular oval, little 
longer than broad, apex well rounded. Colour pellueid with yellowish tinge 
and irregular orange and pinkish specks. L. © 6 mın. 

North-Atlantie, North-Sea and Kattegat (Kullaberg [Sweden]; Kopervik [South- 
west-Norway]. depth 75—113 m; Shetland Isles). 


L. affinis Stimps.. 1855 L.a., Stimpson in: P. Ae. Philad., v.7 p.394 | 1862 


L.a., Bate, Cat. Amphip. Brit. Mus., p.378 | 1893 L. richiardii? (err., non Mich. Lessona 


1865!), A. Della Valle in: F. Fl. Neapel, v.20 p. 656. 
L. 12:5 mm. 
False Bay |Cape of Good Hope]. On gravelly bottom in the coralline zone. 


L. antarctica Pfeff. 1888 L..a., Pfeffer in: Jahrb. Hamburg. Anst., v.5 p. 128 
t.2 f.4 | 1893 L. spinicarpa (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 658. 


Agrees generally with L. spinicarpa (p. 165). L. about 5 mm. 
South-Atlantie (South Georgia). 


L. crassimana Kossm. 1880 L.c., Kossmann, Reise Roth. Meer., v. 21 Malacost. 
p.131 t.13 £.9,10 | 1898 L.e., Sowinski in: M&m. Soc. Kiew, v.15 p.492 t.11 f.20—22; 
t.12 f.7,8 | 1884 L. spinicarpa (err., non Gammarus spinicarpus Abildgaard 1789!), 
Miers in: Rep. Voy. Alert, p.313 | 1893 L. s. (part.), A. Della Valle in: F. Fi. Neapel, 
v.20 p. 653. 


L. 7—7'5 mm. 
Red Sea, Bosphorus. 


L. diemenensis Hasw. 1880 L.d., Haswell in: P. Linn. Soc. N.S.Wales, ».4 
p-262 1.9 f.5 | 1893 L. spinicarpa (part.), A. Della Valle in: F. Fl. Neapel, v.20 p:653. 


Scarcely distinguishable from L. commensalis (p. 166). But eyes round, large; 
gnathopod 2, the process of the 5th joint bifurcate and the finger relatively longer. 


South Paeifie (Tasmania). 


L. gracilis Hasw. 1880 L. g., Haswell in: P. Linn. Soc. N.S.Wales, v.4 p.263 
t.10 f.2 | 1893 L. spinicarpa (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 653. 


Not distinguished from L. commensalis or L. diemenensis (p.166, 168). L. 10 mm. 
South-Paeifie (Tasmania). 


L. grandimana Stimps. 1853 L. grandimanus, Stimpson in: Smithson. Contr., 
v.6 nr.5 p.51 t.3 f.37 | 1893 L.g., A. Della Valle in: F. Fl. Neapel, v.20 p. 656. 


Probably identical with L. spiniearpa (p.165). L. 11 mm. 
Fundy Bay (Granä Manan). On shelly bottom, depth 55 m. 


ie 
NE 
% 
Y. 
A 
% 
Ben: 
N 
Fr 
SV. 
EM 
wi; 
N 
ER 
Ei. 
Ben 
Bi, 
3 


Leueothoe, Paraleueothoe 169 


L. stylifera Stimps. 1855 L. s., Stimpson in: P. Ac. Philad., v.7 p.383 | 1893 
L. s., A. Della Valle in: F, Fl. Neapel, v.20 p. 656. 


L. 8 mm. 
North-Paeifie (Japan). 


3. Gen. Paraleucothoe Stebb. 


1899 Paraleucothoe (Sp. typ.: Leucothoe novae-hollandiae), T. Stebbing in: Ann. 
nat. Hist., ser.7 v.4 p.208. 


Body stout; peraeon segment 1 longer than 24. Antenna 1 larger 
than antenna 2, with rudimentary accessory flagellum. Antenna 2, flagellum 


2  shorter than pedunele. Mandible, eutting edge with few teeth, accessory 
plate larger on left than right mandible, molar wanting, 39 joint of palp 


slight, but longer than half 24. Maxilla 1, outer plate with 5 seta-like spines, 
palp very large, 1-jointed, with expanded base. Maxilla 2, inner plate the 


longer, both plates apparently almost devoid of spines- or setae. Maxillipeds, 
inner plates broad and long, narrow at base, coalesced, but with median line 


of separation, apieal margin slightly concave, the median part produced 


_ inward so as to give the effect of an additional pair, of plates, also 


coalesced, not quite reaching the apical margin of the others, but surmounted 
by the 3 pairs of spine-teeth usually found on the true apex, outer plates 
not rudimentary but small, scarcely reaching apex of 1° joint of palp, armed 
with a single spinule at inner apex, 2 joint of palp the shortest. Gnathopod 1 
chelate between 5t" and 6f" joints, apex of 6% joint grooved to received the 
finger. Gnathopod 2 subchelate, 5% joint slightly produced, finger strong, 
but not nearly reaching process of 5 joint. Peraeopods- 3—5 subequal, 


24 joint expanded. Uropod 3 reaching beyond uropod 2, pedunele longer 


than the smooth equal rami. Telson triangular oval. 
1 species. 
1. P. novaehollandiae (Hasw.) 1880 Leucothoe n.-h., Haswell in: P. Linn. Soe. 


N.S.Wales, v.4 p. 329 t.20 £.2 | 1884 L. n.-h., Miers in: Rep. Voy. Alert, p. 314 | 1893 
L.n. h., A. Della Valle in: F. Fl. Neapel, v.20 p. 656 | 1899 L. n.-h., Paraleucothoe sp. typ., 


-T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p. 208. 


Head rather small. Peraeon segment 1 rather tumid, longer than any 


. succeeding peraeon segment. Side-plate 1 broader than 24 or 34, some- 
- what produced forward. Pleon segment 3, postero-lateral corners sub- 


quadrate, not produced. Eyes large, oval. Antenna 1, 24 joint slightly 
longer than 1°, or shorter, and in the latter case the 34, though much narrower is 
more than '/, as long as 24; flagellum 13-jointed, much shorter than peduncle, 
accessory flagellum like a tubercle, yet seemingly 2-jointed. Antenna 2 sub- 
equal in length to antenna 1, ultimate joint of peduncle sherter than penultimate, 


. flagellum very short, 9-jointed. Lower lip, mandibular processes quadrate. 


Mandible, 8 spines in the spine-row, tapering 34 joimt of palp tipped with 
a long spine. Maxillipeds very narrow, outer plates a little longer than 
broad, one overlapping the other, the peculiar structure of the inner plates 
making it impossible to flatten down the outer plates and elongate palps. 
Gnathopod 1 large in correspondence with the size of the peraeon segment 1 
and its side-plate, 34 joint larger than 4b; 5th with base massive, broad 
and long, produced to a process shorter than base, but tapering to end 
of hind margin of the 6", which from a narrow base becomes subquadrate 
and has a grooved truncate apex, within which is almost concealed the 


170 Paraleucothoe, Anamixidae, Anamixis 


finger, its short triangular nail and its slightly eurved upper margin alone 
protruding. Gnathopod 2 not much larger than gnathopod 1, 34 joint 
larger than 4, 5th with strongly setose, grooved, shortly produced hind 
part, 6! powerful, elongate, basal part broad and longer than broad, palm 
oblique, sharply defined, the strong finger elosing over several teeth into a 
rather large concave portion with which the palm ends. Peraeopods 1—5 
smooth. Peraeopods 3—5, 24 joint oval, 4 a little produced downward 


behind. Uropods 1—3 smooth. Uropod 1 the longest, peduncle equal to 


the equal rami. Uropod 2, pedunele as long as the longer ramus. Uropod 3 
as long as uropod 2, peduncle longer than the equal rami. Telson about 
as long as peduncle of uropod 3, its apex narrowly rounded. Colour light 
pink, nearly white. L. 18 mm. 


Port Jackson [East-Australia]. 


8. Fam. Anamixidae 


1897 Anamixidae, T. Stebbing in: Tr. Linn. Soc. London, ser. 2 v.7 p.36 | 1899 


A., T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p.210. 


Side-plates 2—4 shield-like. Mandible weak. Maxillae 1 and 2 obsolete. 
Maxillipeds without plates. Gnathopod 1 (Fig. 42) chelate. Telson simple. 


Marine. 


1 genus, 1 species. 


1. Gen. Anamixis Stebh. 


1897 Anamixis (Sp. un.: A. hanseni), T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 v.7 p. 35. 


Head hood-like. Side-plate 1 very small, 24—4th very large. Antenna 1, 
pedunele long, no accessory flagellum. Antenna 2 remote from antenna 1, 
more slender, flagellum small. Mouth-organs degraded and abnormal. Gnatho- 
pod 1 (Fig. 42) delicately chelate. Gnathopod 2 (Fig. 43) massive, complexly 
subchelate. Peraeopods 1—5 slender. Pleopods small. 


1 species. 


1. A. hanseni Stebb. 1897 A. h., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 
v.7 p.35 1.11. 


Head narrowed distally, apex rounded, lateral angles indistinet. Side- 
plate 1 triangular, 24 the largest. Pleon segment 3, postero-lateral angles 
a little blunted, segment 5 very short, segment 6 projeeting on either side 
of the telson. Eyes round, lateral. Antenna 1 inserted below apex of 
head, pedunele rather long, 24 joint nearly ®/, of 1°, much more slender, 
34 ?/, of 24, flagellum of 11 joints, some with sensory filaments. Antenna 2 
attached near the base of head, penultimate joint of peduncle longest, ultimate 
joint rather longer than antepenultimate, flagellum with 4 small joints. From the 
slightly keeled underside ofthe head a vertical plate projects between the 24 pair 
of antennae, having on its truncate front edge some microscopic teeth, and sug- 
gesting a coalescence of the mandibles. Maxillipeds, the coalesced 24 joint showing 
a slight division between 2 rounded apices on the outer surface, the 34 joint 
like one of the joints of the palp, of which the 34 (6! of the maxillipeds) 
is the longest, terminal joint or finger long, slender, curved. Gmathopod 1 
(Fig. 42) very slight, 5% joint wider and longer than the 24, its long slender 


Anamixis, Metopidae 171 


curved process tipped with a needle-like spine, 6'% joint slender, tapering, 
together with a needle-like finger opposed to the process of the 5 joint 
to form a long delicate chela. Gnathopod 2 (Fig. 43), 2° joint narrow, wider 
distally, 3% in appearance if not im reality 
articulating not only with 24 and 4%, but also 
with the 5! and 6 joints, 5b subequal 
to 24, broadest at base, apically acute, not 
fully reaching the end of the broad 6'h joint, 
which is 3 or 4 times as long as broad, the 
palm short, oblique, tridentate, finger more 
than half as long as 6% joint, strong, with 
eurved acute tip much overlapping apex of 
5th joint. Peraeopods 
3—5, 24 joint ex- 

panded, oval. Pleo- 
pods with 5- or 6-join- 


Fir. A. Hankani. ted rami, shorter than 


6b joint 


5tb joint 
5th joint 


4th joint 


34 joint 


Fig. 43. A. hanseni. 
Gmnathopod 1. peduncle. Uropod 1 Gnathopod 2. 


longer than uropod 2; 
in both the inner ramus is a little longer, the outer much shorter than 
the peduncle; uropod 3 unknown. Telson a little longer than broad, apex 
broadly rounded. L. about 3 mm. 


Tropical Atlantic (West Indies).. From Goniastraea varia Dana. 


9. Fam. Metopidae 
1899 Metopidae, T. Stebbing in: Ann. nat. Hist., ser. 7 v.4 p.210. 


Side-plate 1 rudimentary, side-plates 2—4 together forming large 
lateral shield (Fig. 47). Antenna 1 sometimes with rudimentary accessory 
flagellum. Upper lip bilobed. Lower lip with inner lobes eoalesced. Mandible, 
eutting edge dentate, molar weak or wanting, palp small, 3-jointed, 39 joint 
very small. Maxilla 1, inner plate very small, outer with 6 spines, palp 
1- or 2-jointed. Maxilla 2, inner plate the smaller. Maxillipeds (Fig. 44, 49), 
inner plates coalesced or "separate, outer small or wanting, palp elongate. 
Gnathopod 1 (Fig. 45) simple or sometimes subchelate, generally feeble. 
Gnathopod 2 (Fig. 46, 50) generally robust, subchelate. Peraeopod 1 usually 
more slender than peraeopod 2 (Fig. 48), 24 joint little or not at all expanded 
in peraeopod 3, usually much but sometimes not at all in peraeopods 4 and 5. 
Uropods 1 and 2 biramous, uropod 3 with a single 2-jointed ramus. Telson 
oval, entire. 

The adjustment of this family is involved in much diffieulty, because in regard 
to many species it remains uncertain whether they have or have not an accessory 
flagellum to antenna 1, whether the inner lobes of the lower lip and the inner plates 
of the maxillipeds be or be not coalesced, and whether the maxilla 1 have the palp 
1- or 2-jointed. 

Marine. 

4 genera, 37 accepted species and 2 doubtful, 


Synopsis of genera: 


N Maxilla 1, palp 1-jointed . .:.....2.. 1. Gen. Metopa ; . . p.172 
Maxilla 1, palp 2-jointed — 2. 


172 Metopidae, Metopa 


| Peraeopods 4 and 5, 24 joint little or not at all ! 
N 1 Er Eee se 2. Gen. Metopella . . p. 182 
| Peraeopods 4 and 5, 24 joint expanded — 3. 
3 Antenna 1 with rudimentary accessory flagellum 3. Gen. Metopoides . p.185 
Antenna 1 without accessory flagellum . . . . 4. Gen. Proboloides . p. 187 


1. Gen. Metopa Boeck 


1871 Metopa (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.140 | 1876 M., 
A. Boeck, Skand. Arkt. Ampbip., «.2 p.451 | 1892 M., G. O. Sars, Crust, Norway, v.1 
p- 248 | 1893 M., A. Della Valle in: F. Fl. Neapel, v.20 p. 634. 


Relative proportions of antennae 1 and 2 varying. Lower lip with inner 
lobes coalesced. Mandible, molar wanting, palp small, 34 joint very short. 
Maxilla 1, palp 1-jointed. Maxillipeds (Fig.44), inner plates coalesced almost 
to the’ apices, outer plates wanting. Gnathopod 1 (Fig. 45) small, seldom 
distinetly subchelate. Gnathopod 2 (Fig. 46) distinetly subchelate, usually 
strong, often differing in the two sexes. Peraeopod 3, 24 joint not expanded. 
Peraeopod 4 usually, peraeopod 5 always, with 24 joint expanded. Uropod 3, 
peduncle longer or shorter than the 2-jointed ramus. 


21 species. 


Synopsis of species: 


N { Peraeopod 4, 24 joint not expanded . .. .. 1. M.esmarki. ... . p.173 
Peraeopod 4, 2d joint expanded — 2. 
2 Side-plate 4, lower margin sinuous — 8. 
Side-plate 4, lower margin not sinuous — 5. 
3 Gnathopod 1, 24 joint rather broad, lamellar . 2. M.robusta. . . . p.173 
Gnathopod 1, 2d joint not expanded — 4. 
| Peraeopod 5, 4thjoint produced sstraightdownward 3. M.sinuata . . . . p.174 
4 2 Peraeopod 5, 4th joint produced downward with 
BCE ET IE SR rar a . .4. M. propingqua . . p.174 
Gnathopod 1, finger fringed with eurved setae pe 
5 or spines — 6. 
\ Gnathopod 1, finger not fringed with eurved setae 
or spines — 7. 
J Antennae 1 and 2 short... . „2... ...5. M. palmata. . . . p.174 
\ Antennae 1 and 2 long. . . 2 .......°...6. M. elypeata . . . p.175 


- | Antennae 1 and 2 markedly unequal — 8. 
Antennae l and 2 not markedly unequal — 18. 


8 | Antenna 1 shorter than antenna 2 — 9. 
Antenna 1 longer than antenna 2 — 10. 


j Animal small, with large eyes... ..... 7. M.alderii ... . . p.175 


’ \ Animal large, with small eyes... ... ...8. M. spectabilis . . p. 176 


10 Gnathopod 2, palm not deeply incised — 11. 
Gnathopod 2, palm deeply ineised — 12. 


11 f Gnathopod 1, 6th joint nearly linear... .. 9. M.affinis ... .p.176 

\ Gnathopod 1, 6th joint rather broad . . .. . 10. M.latimana . . . p. 177 
Gnathopod 2, thumb-like process reaching beyond 

19 | a a Ber Se 11. M. norvegica. . . p. 177 
Gnathopod 2, thumb-like process not renching 

beyond the pale ...-.2.2:% 4... . 12. M. boeckii . . . . p.178 


a 


ss f 
RT 
anne ia 


Metopa 173 
13 Gmnathopod 1 distinetly subehelate . . . - - . 13. M. leptocarpa . . p.178 
Gnathopod 1 not distinetly subchelate — 14. 


- 


4 Antennae 1 and 2 long — 15. 
Antennae 1 and 2 not long — 17. 


Peraeopods 4 and 5, 4th joint narrow, scarcely 
15 a N RE a EN A er 14. M. longicornis . . p. 179 
Peraeopods 4 and 5, 4th joint deeurrent, not 
narrow — 16. 
16 Side-plate 4 nearly as deep as broad. .. . . 15. M. pusilla . . . . p.179 
Side-plate 4 not nearly as deep as broad . . . 16. M. aequicornis . . p.180 
17 .‚Gnathopod 2, palm serrate — 18. 
Gnathopod 2, palm smooth — 19. 
18 j Gnathopod 2, palm irregularly serrate .. .. . 17. M. borealis. . . . p.180 
- 1 Gnathopod 2, palm regularly serrate . ... . . 18. M. rubrovittata . p.180 
19 N A 19. M. sölsbergi . . - p.181 
Gnathopod 2 feeble — 20. 


N N u EEE 20. M.tenuimana . . p.181 
Body stout; gnathopod 2, 6th joint oblong 
kasarsheular Eee 21. M.invalida . . . p.182 


Body slender; gnathopod 2, 6th joint oblong 
20 | | 


5 1. M. esmarki Boeck 1872 M.e., A. Boeck in: Forh. Selsk. Christian., 1871 
p-47 | 1893 M. esmarkii, A. Della Valle in: F. Fl. Neapel, v.20 p. 644. 


Back round. Side-plate 4 very large. Antenna 1 in S much, in O little 
shorter than antenna 2, 1° joint much longer than 24, flagellum 10- or 11-jointed. 
Antenna 2, ultimate and penultimate joints of pedunele subequal, flagellum very 
short. Gnathopod 1 in C slender, 4% joint produced, 5tt wider and considerably 
longer than the narrowly oval 6t%, which has no definite palm. Gnathopod 2 in C 
robust, 5!" joint cup-shaped, 6" powerful, with a deep and wide cavity 
between a stout process of the hind margin and a small tooth, over which 
the finger curves to meet the process, leaving a small cavity between its 
hinge and the tooth. Gnathopod 2 in © with much smaller process and 
cavity, the margin serrate above and below the small tooth. Peraeopods 1—5, 
joints slender, except the 24 of peraeopod 5, which is almost broader than 
deep, the 4!" of peraeopod 3, which is not much expanded, and the 4th of 
peraeopods 4 and 5, which is very much widened and overlaps all the next joint. 
Uropod 3, pedunele with 6 spines, longer than ramus. L. 90 4, d 5 mm. 


North-Paeifie (California). 


2. M. robusta 0. Sars 1892 M.r., G. O. Sars, Crust. Norway, v.1 p. 270 
1.96 £.1. 


Body stout, integument very firm. Head, lateral corners angular. Side- 
plate 4 nearly twice as large as 24 and 34 combined, lower margin very sinuous. 
Pleon segment 3, postero-lateral angles rather produced. Eyes round, bright 
red. Antennae 1 and 2 subequal. Antenna 1, flagellum longer than peduncle, 
14-jointed. Antenna 2, ultimate and penultimate joints of pedunele subequal, 
flagellum 9-jointed. Gnathopod 1, 22 joint rather broad and lamellar, 4" forming a 
broadly rounded setiferous lobe, 5!" very narrow and elongated, rather tapering, 
6!" about half as long, linear, finger short, finely eiliated within. Gnathopod 2 
powerful, as in M.norvegica (p. 177), the 4% and 5" joints both eup-shaped; 6th 
subquadrate, but gradually expanded towards the slightly oblique, convex, in 
part coarsely serrate, palm, which is defined by a strong tooth. Peraeopod 1 


174 ° Metopa 


not like peraeopod 2, but slender, while peraeopods 2—5 are powerful, with 
the 4b joint expanded and produced, the finger strong, minutely serrate. 
Peraeopods 4 and 5 have the 24 joint expanded, in peraeopod 5 rounded 
quadrangular, and the 4% joint produced below the 5%. Uropod 3, peduncle 
with 1 spine, little longer than 1° joint of ramus, 24 joint of ramus shorter 
than 1%. Telson oval, obtusely pointed, with 2 pairs of strong spines. 
Colour whitish pellucid, with orange patches. L. O0 6 mm. 


Arctie Ocean and North-Atlantie (Norway). Depth 55—94 m. 


3. M. sinuata O. Sars 1887 M. bruzelüi (part.), H. J. Hansen in: Vid. Meddel., 
ser.4 ©.9 p.97 t.4 f.2, 2a, b | 1892 M. sinuata, G.O.Sars, Crust. Norway, v.1 p.263 
t. 92. £..2. 


Body rather compressed, not very slender. Head, lateral corners angular. 
Side-plate 4 broader than deep, much larger than 24 and 3% combined, lower 
margin sinuous. Pleon segment 3, postero-lateral corners a little produced. Eyes 
rather large, irregularly rounded. Antennae 1 and 2 subequal, short and stout. 
Antenna 1, 1° joint longer than 24 and 34 combined, flagellum little longer than 
peduncle, 12-jointed. Antenna 2, ultimate and penultimate joints of peduncle sub- 
equal, together longer than flagellum. Gnathopod 1 not weak, 6" joint longer 
than 5%, very narrowly oval, with 5 spinules on hind margin. Gnathopod 2, 
6! joint oblong oval, palm minutely serrate, rather oblique in Q, less so 
in d, defined by a slight angular projection, which like the joint itself is 
more strongly developed in S than in 0. Peraeopods 2—5 rather stout, 
24 joint in peraeopod 5 broadly oval, and 4% joint produced a little beyond 
5th, Uropod 3, peduncle with 2 spines, nearly as long as ramus, of which 
24 joint is shorter than 1%. Telson with 2 pairs of lateral spines, oval, 
apex obtuse. L. Q 4 mm. 


Arctic Ocean and North-Atlantie (Nordland, depth 56—75 m; Greenland). 


4. M. propingua O. Sars 1892 M. propingva, G. O. Sars, Crust. Norway, v1 
p- 264 1.93 £.1. 


Very near to M.sinuata; but antennae 1 and 2 longer and more slender, 
antenna 1 longer than antenna 2, 1° joint as long as 22 and 34 combined, flagellum 
decidedly longer than pedunele. Antenna 2, flagellum as long as ultimate 
and penultimate joints of pedunele combined. Gnathopod 1, 6% joint shorter 
than 5tt and much narrower, without spinules. Gnathopod 2 rather powerful, 
defining tooth of palm well developed. Peraeopod 5, 24 joint irregularly 
rounded, hind margin bulging in the middle, 4 joint produced in a curved 
lobe beyond 5!k, Uropod 3, peduncle with 3 strong blunt spines, decidedly 
shorter than ramus, of which 24 joint is quite as long as 1%. Telson with 
3 pairs of lateral spines. Colour whitish, with dark brown stellate spots 
on back, brown shadows on sides. L. about 3 mm. 


Trondhjemsfjord. Depth 75 m. 


5. M. palmata O. Sars 1892 M.p., G. O. Sars, Orust. Norway, v.1 p.272 t. 96 £.2. 


Body stout. Head, lateral corners subangular. Side-plate 4 larger than 
24 and 34 combined, lower margin in a single curve. Pleon segment 3, postero- 
lateral angles little produced. Eyes round, rather large. Antennae 1 and 2 sub- 
equal, short. Antenna 1, 1% joint much longer than 2 and 3X combined, flagellum 
a little longer than peduncle, 12-jointed. Antenna 2, ultimate joint of peduncle 


Metopa 175 


rather longer than penultimate, flagellum 7-jointed. Gnathopod 1 slender, 
24 joint narrow, 4 rather long, narrowly and triangularly produced, 5! 
long, linear, 6! narrower and rather shorter, finger short, scale-like, fringed 
closely. within with long curved setae. Gmathopod 2 powerful, 5t" but not 
4th joint cup-shaped, 6!" oblong quadrangular, palm transverse, gently concave, 
obscurely erenulate, defined by a broad setose lobe slightly emarginate at 
tip, finger ending with a small hook. Peraeopods 1—5 nearly as in 
M.robusta (p. 173), but rather less strong. Uropod 3, peduncle with 3 spines, 
nearly as long as ramus, of which the 24 joint is nearly as long as the 1. 
Telson oval, obtusely pointed, with 2 or 3 pairs of lateral spines. L. 5 mm. 


Arctie Ocean (Hammerfest [Finmark]). 


6. M. clypeata (Kreyer) 1842 Leucothoe e., Kreyer in: Naturh. Tidsskr., v.4 
p.157 | 1845 L.c., Kroyer in: Naturh. Tidsskr., ser.2 v.1 p.545 t.6 f.2a-—f | 1846 
L.e., Kroyer in: Voy. Nord., Crust. t.22 f.2a—o | 1862 Montagua e., Bate, Cat. Amphip. 
Brit. Mus., p.58 t.9 f.4 | 1871 Metopa c., A. Boeck in: Forh. Selsk. Christian., 1870 
p- 140 | 1876 M. c. (part.), A. Boeck, Skand. Arkt. Amphip., v.2 p.451 t.18 £.4; 
t.19 £.3 | 1887 M.c., H.J. Hansen in: Vid. Meddel., ser. 4 v.9 p.90 t.3 f.3—3b | 1893 
M. c., A. Della Valle in:-F. Fl. Neapel, v.20 p. 638 t.59 f. 50, 51. 


Body somewhat compressed, strong. Side-plate 4 much broader than deep, 
much larger than 24 and 34 combined. Pleon segment 3, postero-lateral corners 
subquadrate. Eyes very small, round. Antenna 1 very long, 1° joint long, 
a little longer than 24, flagellum slender, twice as long as peduncle, 25-jointed. 
Antenna 2 rather shorter than antenna 1, ultimate and penultimate joints of 
peduncle subequal, flagellum less than half length of peduncle, 12-jointed. 
Maxilla 1 with large 1-jointed palp. Maxillipeds, inner plates separate (?). 
Gnathopod 1, 4 joint broadly produced and setose, 5! long, tapering, 
fringed with long setae on the hind margin, 6% much shorter, linear, little 
curved, with setae on front and apical part of hind margin, finger rudi- 
mentary, with a comb of graduated spines. Gnathopod 2 stoutly built, 
6! joint very large, longer than the 1°, oblong oval widening distally, 
palm finely serrate, slightly convex and oblique, defined by a strong tooth. 
Peraeopod 1 more slender than peraeopod 2, which resembles peraeopod 3. 
Peraeopod 5, 24 joint shorter and broader, also 4 with the laminar part 
shorter and broader, but the produced part longer than in peraeopod 4 
(according to Kroyer’s text and to the fig. 3b of Hansen, but not according to 
Kroyer’s fig. and Boeck’s fig. 4n).. Uropod 3 stout, pedunele with some spinules, 
not quite so long as the 2 subequal joints of the ramus. Telson oval, obtuse 
at apex, figured by Boeck with 2 pairs of lateral spines. L. 6—8 mm. 


Arctic Ocean and North-Atlantie (Greenland; Bell Sound [Spitzbergen] ?). 


7. M.alderii (Bate) 1857 Montagua a., Bate in: Ann. nat. Hist., ser.2 ov.19 
p-137 | 1862 M. a., Bate, Cat. Amphip. Brit. Mus., p.57 t.8 f.6 | 1871 Metopa a., 
A. Boeck in: Forh. Selsk. Christian., 1870 p.141 | 1892 M. alderi, G. ©. Sars, Crust. 
Norway, v.1 p.250 t.86 | 1893 M. alderi, A. Della Valle in: F. Fl. Neapel, v.20 p. 638 
t.59 f.52 | 1874 Stenothoe alderi, M’Intosh in: Ann. nat. Hist., ser. 4 v. 14 p. 265, 


Body rather compressed, but back broadly rounded. Head, lateral eorners 
broadly truncate. Side-plate 4 much larger than 24 and 34 combined. Pleon 
segment 3, postero-lateral corners quadrate. Eyes large, round oval, dark red. 
Antenna 1 much shorter than antenna 2, 1° joint as long as 24 and 34 combined, 
flagellum in O, but not in C, longer than peduncle. Antenna 2 strong, especially 
in CS, ultimate joint of peduncle almost or quite as long as penultimate and 


176 Metopa 


longer than flagellum. Gmathopod 1 small, 4 joint not much produced, 
5th as long and broad as 6%, which is imperfectly subchelate. Gnathopod 2 
strong, especially in JS, 4tk joint (as in M. norvegica, M. spectabilis and 
M. robusta) produced on the inner side in a thin triangular lamella, so as 
to have a cup-shaped appearance like the 5t", 6th in © oblong oval, palm 
oblique, armed with 8 teeth beginning at the hinge of the finger and 
followed by a deeply sinuous part which reaches the defining tooth; 6th in 
ö much larger, palm with 5 or 6 teeth followed by a deep excavation 
and a large defining tooth. Peraeopods 3—5, with 4 joint decurrent and 
rather wide, 24 joint well expanded in peraeopods 4 and 5, in the latter rather 
widened below. Uropod 3, pedunele with 5 minute spines, nearly as long 
as ramus, of which the 2 joints are equal. Telson large, oblong oval, 
broadly rounded at apex. Colour whitish, obliquely banded with reddish 
patches. L. 7 mm. 


Arctic Ocean, North-Atlantie, North-Sea and Skagerrak (South- and West-Norway, 
depth 38—1183 m; Spitzbergen; Murman coast; Iceland; British Isles); Kattegat. 


8. M. spectabilis O. Sars 1876 M. clypeata var., A. Boeck, Skand. Arkt. 
Amphip., %.2 t.18 £.5 | 1876 M. alderi (err.. non Montagua alderii Bate 18571), G. O. 
Sars in: Arch. Naturv. Kristian., v.2 p. 255 | 1879 M. spectabilis, G. O. Sars in: Arch. 
Naturv. Kristian., v.4 p.451 | 1885 M. s.. G. OÖ. Sars in: Norske Nordhavs-Exp., v. 6 
Crust. I p.185 t.15 f.4a—n | 1892 M.s., G. O. Sars, Crust. Norway, v.1 p.251 t. 87 | 
1893 M. s., A. Della Valle in: F. Fl. Neapel, v.20 p. 641 t.59 f. 58. 


Body rather slender. Head, lateral corners obtusely rounded. The much 
greater size is the chief distinetion between this species and M. alderii (p. 175) 
but also, eyes comparatively much smaller; antenna 1 in both JS and 9 
much shorter than antenna 2, which have ultimate and penultimate joints of 
peduncle long and strong and flagellum very short; gnathopod 1, 6" joint 
rather shorter than 5t"; gnathopod 2, 6" joint in Q with palm more oblique 
and its sinus deeper, in C very large, the defining tooth much larger, the 
excavation deeper, the dentate portion of the palm having the hindmost 
tooth much larger than the others; uropod 3, peduncle as long as ramus, 
24 joint of ramus shorter than 1°; telson rather narrower. L. 9 14 mm. 


Arctic Ocean (Hammerfest [Finmark], depth 94—149 m); North-Atlantie. 


9. M. affinis Boeck 1871 M..a., A. Boeck in: Forh. Selsk. Christian., 1870 
p. 142 | 1876 M.a., A. Boeck, Skand. Arkt. Amphip., v.2 p.459 t.19 f.2 | 1892 M. a., 
G. O. Sars, Crust. Norway, ®©.1 p.260 t.91 f.2| 1893 M.a., A. Della Valle in: F. Fl. 
Neapel, v.20 p. 644. 


Body in G slender, but not much compressed. Head, lateral corners 
rounded. Side-plates smaller than usual. Pleon segment 3, postero-lateral 
corners nearly quadrate. Eyes small, round. Antenna 1 longer than antenna 2, 
1% joint longer than 24, flagellum nearly twice as long as peduncle, not 
very slender. Antenna 2, ultimate and penultimate joints of peduncle subequal, 
together as long as flagellum. Gnathopod 1, 4% joint broadly produced, setose, Stk 
rather long, subfusiform, 6 a little shorter, much narrower, nearly linear, 
finger very short, stout, setose on inner margin. Gmnathopod 2 powerful, 
5th joint wide, cup-shaped, 6! very large and broad, subquadrate, though 
somewhat widening distally, palm nearly transverse, smooth, little curved, 
defined by a small tooth. Peraeopods 1—5 powerful, 6! joint somewhat 
eurved, finger strong and ceurved. In peraeopod 5, 2° joint comparatively 
small, oval quadrangular, 4 strongly dilated, but only little deeurrent. 


are) 


Metopa 47 


Uropod 3, peduncle short and broad, little longer than one of the subequal 
joints of the ramus; its one spine is apieal. Telson scarcely twice as long 


as broad, devoid of spines, apex obtuse. L. 3—4 mm. 


Aretie Ocean, North-Sea and Christianiafjord (Norway). 


10. M. latimana H. J. Hansen 1887 M.1., H. J. Hansen in: Vid. Meddel,, 
ser. 4 v.9 p.92 | 1893 M.1., A. Della Valle in: F. Fl. Neapel, v.20 p.644 | 1892 M. affinis?, 
G. ©. Sars, Urust. Norway, v.1 p. 260. 


Close to M. affınis. Head, lateral corners broadly rounded. Side-plates 
not very deep. Antenna 1 little shorter than the whole body, peduncle about 
as long as half flagellum, 1° joint a little longer than 24. Antenna 2 about 
?/, length of antenna 1, ultimate joint of peduncle rather longer than penultimate, 
flagellum 6-jointed. Gnathopod 1 a little shorter and thicker than in M.norvegica, 
especially as to 6% joint, in which oblique palm oceupies whole breadth of 
hand. Gnathopod 2 rather short, powerful, 6" joint widening distally, rather 
longer than broad, palm long, smooth, nearly straight, defined by a small 
tooth. Peraeopods 1—5 long, the fingers very long; peraeopod 5, 24 joint 
pretty well expanded, only a little longer than broad. L. 3 mm. 

Aretie Ocean and North-Atlantie (Greenland). 


11. M. norvegica (Lilj.) 1850 Leucotho& n., W. Liljeborg in: Öfv. Ak. Förh., 
0.7 p.82 | 1851 L.n., W. Liljeborg in: Vetensk. Ak. Handl., 1850 p.335 t.20 f.4 | 1862 
Montagua n., Bate, Cat, Amphip. Brit. Mus., p. 370 ! 1888 Metopa n., T. Stebbing in: 
Rep. Voy. Challenger, v.29 p.236 | 1856 Montagua pollexianus (nom. nud.), Bate in: 
Rep. Brit. Ass., Meet.25 p.57 | 1857 M. pollexiana, Bate in: Ann. nat. Hist., ser. 2 


0.19 p. 137 | 1869 Probolium pollexianum, A.M. 6 joint 


Norman in: Rep. Brit. Ass., Meet. 38 p.274 | 1874 
Stenothoepollexiana, M’In- 
tosh in: Ann. nat. Hist., 
ser.4 v.14 p. 265 | 1875 
Metopa p., Ad. Metzger 
in: Jahresber. Comm. D. 
Meere, v.2/3 p.299 | 1887 
M.p., H.J. Hansen in: 
Vid. Meddel,, ser. 4 v.9 
p-92 t.3 £.5, 5a |'1892 
M. p., 6.0. Sars, Crust. 
Norway, v.1 p.269 t.95 | 
1876 M. clypeata (part.), ' 
A. Boeck, Skand. Arkt. 
Amphip., v.2 p.454 | 1893 
. M. e., M. pollexiana, A. 
1g. 44. Della Valle in: F. FM. 
M. ; M Fig. 46. Gnathopod 2, g. 
ie Neapel, v.20 p.643, 645, Fig. 45,46. M. er 

[After G.O.Sars.] 569. __ [After 6. O. Sars.] 

Body rather compressed, back rounded. Head, lateral corners broadly 
rounded. Side-plate 4 fully as large as 24 and 34 combined. Pleon segment 3, 
postero-lateral corners rather acute than quadrate. Eyes round, dark red. 
Antenna 1 longer than antenna 2, 1° joint longer than 24 and 34 combined, 
flagellum slender, twice as long as peduncle, 24-jointed. Antenna 2, ultimate 


Fig. 45. Gnathopod 1. 


ah gih 6 joint 


. and penultimate joints of peduncle subequal, flagellum scarce half length of 


peduncle. Maxillipeds (Fig. 44), inner plates cleft only at apex, nearly as long as 

the next joint, which displays no outer plate. Gnathopod 1 (Fig. 45), 4% joint 

broadly round at produced setose apex, 5th long, densely setose, nearly twice as 

long as the 6%, which is narrow but has a distinet nearly transverse palm. 
Das Tierreich. 21. Lief.: T. BR. R. Stebbing, Amphipoda I. 12 


178 Metopa 


Gnathopod 2 (see Lilljeborg’s figure) very large, especially ind (Fig.46), 4" and 
5th joints cup-shaped asin M. alderüi (p. 175), 6% long, gradually widening distally, 
palm angularly produced in the middle, minutely erenulate thence to the hinge, 
this part separated by a deep narrow incision from a defining tooth which extends 
beyond the rest of the joint and beyond the finger when elosed. Peraeopod 1 
more slender than peraeopod 2, but with the ga joint rather broad aud laminar. 
Peraeopods 2—5, finger strong, minutely serrulate within, 4% joint produced, 
especially in peraeopod 5, 24 joint oval, not very long, in 'peracopods 4 and 5. 
Uropod 3, peduncle with 1 spine on nodiform projeetion of apex, 1° joint 
of ramus longer than 24, nearly as long as pedunele. Telson triangular 
oval, tapering to a narrow apex, 2 pairs of lateral spinules. Colour whitish- 
yellowish, with narrow orange band to each segment; ova bright bluish. L. Q 
8 mm, J rather larger. 


Aretie Ocean, North-Atlantie and North-Sea (Norway, depth 55—94 m; Greenland; 
Murman coast; British Isles). 


12. M. boeckii 0. Sars 1868 Montagua norvegica (err., non Leucothoe n. 
Liljeborg 1850!), Bate & Westwood, Brit. sess. Crust., v.2 p.500 f. | 1871 Metopa bruzelii 
(err., non Montagua b. Goes 1866!), A. Boeck in: Forh. Selsk. Christian., 1870 p.142 | 
1876 M.b., A. Boeck, Skand. Arkt. Amphip., v.2 p.458 t.18 f.29 | 1882 M. borealis 
(part.), G. O. Sars in: Forh. Selsk. Christian., nr. 18 p.91 t.4 f.4a | 1892 M. boecki, 
G.O. Sars, Crust. Norway, v.1 p. 252 t. 88. 


Body slender and compressed. Head, lateral corners angular. Side-plate 4 
larger than 2 and 34 combined. Pleon segment 3, postero-lateral eorners rather 
acute. Eyes round, dark red. Antenna i in Q rather longer than antenna 2, 
scarcely so in d, 1° joint not so long as 24, flagellum slender, longer than pe- 
duncle. Antenna 2, ultimate and penultimate joints of pedunele subequal, stronger 
in J than in Q, with flagellum shorter. Gmnathopod 1 feeble, 4 joint not 
broadly produced, 5tk setose, little longer than the fusiform 6%. Gmathopod 2 
rather powerful, 4 joint not cup-shaped, 6% in 9 triangular oval, palm somewhat 
oblique, near the hinge of finger scarcely dentate, in the other half minutely, 
being then defined by a strong tooth and 2 spines; in the J larger, having 
the minute dentation replaced by a deep and rather wide excavation bounded 
by a sharp tooth. Peraeopods 1—5 rather slender, 4" joint not greatly 
expanded or much decurrent even in peraeopods 4 and 5, which have the 24 joint _ 
oblong oval. Uropod 3 rather slender, peduncle with 4 spines, subequal to 
ramus, in which 1° joint is longer than the 24. Telson oblong oval, distally 
tapering to acute apex, 3 pairs of lateral spines. Colour whitish with scattered 
red-brown patches; ova bluish. L. 6 mm. 


Arctic Ocean, North-Atlantie and North-Sea (Norway). 


13. M. leptocarpa O. Sars 1882 M.l., G. O.Sars in: Forh. Selsk. Christian., 
nr.18 p.91 t.4 f.3,3a | 1892 M.l., G.O. Sars, Crust. Norway, v.1 p.265 1.93 £.2| 
1893 M.!., A. Della Valle in: F. Fl. Neapel, v.20 p.639 t.59 f. 53. 


Body very slender, not much compressed. Head, lateral eorners angular. 
Side-plate 4 scarcely larger than 24 and 39 combined. Pleon segment 3, postero- 
lateral corners little produced, rather obtuse. Eyes round. Antennae 1 and 2 
subequal, rather short. Antenna 1, 1° joint scarcely aslong as 24 and 3 combined, 
flagellum shorter than peduncle, 9-jointed. Antenna 2, ultimate joint of peduncle 
shorter than penultimate, flagellum about half length of pedunele. Gnathopod 1 
slender, longer than gnathopod 2, 5th joint extremely narrow and elongated, 
6!h much shorter, narrowly oblong but widening distally, the small palm nearly 
transverse, defined by a small tooth. Gnathopod 2 powerful, 6% joint broadly 


BEN! 


179 


Metopa 


‘oval, palm smooth, convex, rather oblique, defined by a sharp tooth. Peraeo- 
pods 1 and 2 little unequal, peraeopods 3—5, 4" joint not greatly expanded, 
in peraeopod 5 produced below middle of 5tk, 24 joint of peraeopod 5 oblong 
oval. Uropod 3, peduncle with 2 spinules, longer than 1° joint of ramus, 
24 as long as 1°. Telson unarmed, rather broadly oval, apex obtuse. 1.04 mm. 


North-Atlantie (Christiansund [West-Norway]). Depth 110—-146 m. 


14. M. longicornis Boeck 1871 M.1l., A. Boeck in: Forh. Selsk. Christian., 
1870 p.143 | 1876 M.1,, A. Boeck, Skand. Arkt. Amphip., ©.2 p.460 t.19 f.1 | 1887 
M.|., H. J. Hansen in: Vid. Meddel., ser. 4 v.9 p.97 t.4 f.1,1a|1892 M.|., G.0O. 
Sars, Crust. Norway, v.1 p.258 t.90 f.2 |, 1893 M.L., A. Della Valle in: F. Fl. Neapel, 
- ©.20 p. 644. 


Body slender. Head, lateral eorners bluntly produced. Sär-elite 4 as deep 
as broad, rather larger than 24 and 32 combined. Pleon segment 3, postero- 
lateral corners produced but not very acutely. Eyes round, rather large. 
Antennae 1 and 2 subequal, rather long. Antenna 1, 1° and 24 joints long, sub- 
equal, flagellum scarcely longer than peduncle, with 10 joints (20, Sars in text). 
Antenna 2, ultimate joint of peduncle as long as flagellum, rather shorter than 
penultimate. Gnathopod 1, 6'% joint as long as 5'%, subfusiform, with a row of 
seven minute spinules on what may be considered the palmar part of the hind 
margin. Gnathopod 2 comparatively feeble, scarcely longer than gnathopod 1, 
6% joint oblong triangular, palm oblique, smooth, defined by a small tooth. 
 Peraeopods 1—5 rather slender, 4% joint little decurrent, sublinear; 24 rather 
narrowly oval in peraeopod 4, more broadly so. in peraeopod 5, with hind 
margin rather abruptly curved in the middle. Uropod 3, peduncle with 
3 spines, nearly as long as ramus, the joints of which are subequal. Telson 
with 3 pairs of lateral spines, narrowly oval, blunt at apex. 1.0 4 mm. 


Aretie Ocean, North-Atlantie and Christianiafjord (Norway; Greenland, depth 
56— 112 m). 


15. M. pusilla O.Sars 1892 M.p., G. ©. Sars, Crust. Norway, v.1 p.256 t.90 f.1. 


Body short, eompressed. Head, lateral corners sharply angular. Side-plates 
very large, 4! nearly as deep as broad, rather larger than 24 and 3% combined. 
Pleon small. Pleon segment 3, postero-lateral corners little produced but 
acute. Eyes minute, round, dark red. Antennäe 1 and 2 rather slender and 
tolerably long, though shorter than in M. longicornis. Antenna 1, 24 joint 
scarcely shorter than 1°, flagellum longer than peduncle, 11-jointed. Antenna 2 
scarcely shorter than antenna 1, ultimate and penultimate joints of pedunele 
subequal, slender, flagellum shorter than the 2 together, 9-jointed. Gnathopod 1 
rather feeble, 6!" joint decidediy shorter than 5%, sublinear. Gnathopod 2 
moderately strong, 6!" joint oblong triangular, widening distally, palm somewhat 
“oblique, nearly straight, slightly serrated, defined Dy an acute tooth; in C 
rather longer than in O0. Peraeopod 1 rather slender and elongated, the 
others stouter, 3—5 successively shorter, the finger strong and curved. 
Peraeopod 5, 24 joint rather a short broad oval, 4 produced beyond middle 
of 5tk, Uropod 3, peduncle with 2 spines, scarcely longer than 1° joint 
of ramus, and subequal to the 24. Telson with 2 pairs of lateral spines, 
oblong oval. Colour whitish with stellate brownish REDE patches, side-plates 
also tending to greenish. L. Q 3 mm. 


North-Atlantie, North-Sea and Skagerrak (West- and South-Norway). In shallow 
water among Algae and Hydroids. 


12* 


a a ee 


180 Metopa 


16. M. aequicornis U. Sars 1879 M. aegvicornis, G. O. Sars in: Arch. Naturyv. 
Kristian., e.4 p.453 | 1885 M.a., G.O.Sars in: Norske Nordhavs-Exp., ©.6 Crust. I 
p. 188 t.15 f.5 | 1895 M. aeqwicornis, A. Della Valle in: F. Fl. Neapel, v.20 p. 644. 


Body rather stout, back round. Head, lateral corners little projeeting. Side- 
plate 4 elliptic, broader than deep, larger than 24 and 34 combined, concealing 5th 
and 6%, Pleon segment 3, postero-lateral corners slightly produced but obtuse. 
Eyes small, round, red. Antennae I and 2 nearly as long as the body, subequal. 
Antenna 1, 1° joint a little shorter than 24, flagellum slender, a little longer 
than peduncle, with many joints. Antenna 2, ultimate joint of peduncle longer 
than penultimate and as long as flagellum. Gnathopod 1 as in M. spectabilis 
(p.176). Gnathopod 2, 6!" joint very large, distally dilated, palm somewhat oblique, 
almost straight, eoarsely dentate throughout, and defined by a short triangular 
projection. Peraeopods 1—5, uropods 1—3 and telson resembling those of 
M. spectabilis. Colour whitish, pellueid, with some very faint pigmentation. 
L. 75 mm. 


Arctie Ocean (South-West of Spitzbergen). Depth 1400 m. 


17. M. borealis O.Sars 1882 M.b. (part.), @. O. Sars in: Forh. Selsk. Christian., 
nr. 18 p.91 t.4 f.4 | 1887 M.b.?, H.J. Hansen in: Vid. Meddel., ser.4 v.9 p.91 t.3 
f.4,4a | 1892 M.b., G. O. Sars, Crust. Norway, v.1 p.254 t.89 f.1 | 1893 M.b., A. ah 
Valle in: F. Fl. Neapel, v.20 p. 644. 


Body rather stout. Head, lateral cornersrounded. Side-plates large,4{ much 
larger than 2dand 39 combined. Pleon segment 3, postero-lateral corners acutely 
produced. Eyes round, dark red. Antennae 1 and 2 short, antenna 1 slightly 
shorter than antenna 2, 1° joint as long as 24 and 34 combined, flagellum 
longer than peduncle, 12-jointed. Antenna 2, ultimate joint of peduncle rather 
longer than penultimate, and equal to flagellum. Gnathopod 1 small, 6% joint 
about as long as 5%, narrowly oval, with no distinet palm. Gnathopod 2, 
6!" joint oblong, slightly expanded distally, palm slightly oblique, little curved, 
coarsely and irregularly dentieulate throughout, defined by a tooth. Peraeo- 
pods 2—5 stout; in peraeopod 4, 24 joint broadiy oval, 4! broad and 
decurrent almost to end of 5!%. Uropod 3, peduncle with 2 spinules, much 
shorter than ramus, of which 24 joint is shorter than 1°. Telson without 
spines, oblong oval, apex obtuse. L. 9 5—7 mm. 

Arctie Ocean and North-Atlantie (Norway, Greenland). 


18. M. rubrovittata O. Sars ?1869 Probolium alderi (err., non Montagua 
alderii Bate 1857!), A. M. Norman in: Rep. Brit. Ass., Meet. 38 p.273 | 1882 Metopa 
rubrovittata, G. ©. Sars in: Forh. Selsk. Christian., nr. 18 p.90 t.4 f.2,2a | 1889 M.r., 
Hoek in: Tijdschr. Nederl. dierk. Ver., ser.2 «2 p.188 t.7 f.4,4°| 1892 M.r.,, @.0. 
Sars, Crust. Norway, v.1 p. 255 t. 89 f 2|1893 M.r., A. Della Valle in: F. Fl. Neapel, 
v.20 p. 645. 


Body stout and compact. Head, lateral corners a Side-plate 4 much 
broader than deep, nearly twice as large as 2 and 3X combined. Pleon segment 3, 
postero-lateral corners produced but obtuse at apex. Eyes rather small, 
round, dark red. Antenna 1 short, a little longer than antenna 2, 1° joint 
rather longer than 22 and 34 combined, flagellum longer than peduncele, 10-jointed. 
Antenna 2, ultimate and penultimate joints of peduncle subequal, flagellum longer 
than both combined. Gnathopod 1, 6% joint narrower than 5%, subequal to it in 
length, palm imperfectly defined by a spine about in the middle of the hind 
margin. Gnathopod 2 rather powerful, 6% joint oblong quadrangular, but 
widening a little distally, palm nearly transverse, convex, regularly serrate, 


Metopa 181 


defined by a strong acute tooth. Peraeopods 2—5 moderately stout, expansion 
of 24 joint in peraeopod 5 oblong oval, and the 4% produced nearly to end 
of 5%. Uropod 3, peduncle with one spine, not longer than 1° joint of 
ramus, which is equal to 24, Telson ‚without spines, more than twice as 
long as broad, oval, apex obtuse. Colour whitish with bands of erimson, 
which on the side-plates are oblique and undulating; ova bluish. L. 25—4 mm. 


Aretie Oeean, North-Atlantie and North-Sea (Christiansund, depth 56 m, and 
Vadsö [Norway]; Holland; France; Firth of Clyde; Liverpool Bay); Kattegat. 


19. M. sölsbergi J. S. Schn. 1884 M. s., J. S. Schneider in: Tromse Mus. 
Aarsh., ©.7 p.71 t.8,4 | 1892 M.s., G. O. Sars, Crust. Norway, v.1 p. 266 t. 94 f.1| 
1893 M. s., A. Della V alle in: F. Fl. Neapel, v.20 p. 645. 


Body robust, little compressed, integument unusually soft and thin. 
Head, lateral corners rounded. Side-plate 4 as deep as broad, rather larger than 
' 24 and 34 combined. Pleon segment 3, postero-lateral corners subquadrate. Eyes 
round, yellowish red. Antenna 1 rather shorter than antenna 2, 1° joint as long as 
24 and 32 combined, flagellum much longer than pedunele, 14-jointed. Antenna 2, 
ultimate joint of pedunele equal to penultimate (Sars) or longer than it (Schneider), 
flagellum half length of peduncle, 10-jointed. Maxilla 1, palp 1-jointed. 
Maxillipeds with inner plates apparently separate (see Schneider 1.3 f. 6). 
Gnathopod 1 rather strong, 4 joint rectangular, little produced, 5'% and 
6'h subequal, 6% oblong oval, with 2 spinules on the hind margin, but no 
definite palm. Gnathopod 2 strong, 6!" joint oblong quadrangular, but 
slightly expanded distally, palm smooth, slightly oblique, forming an obtuse 
angle with the hind margin, defined by 2 spinules, and (according to 
Schneider, but not Sars) by a small process. Peraeopod 1 not quite so 
stout as peraeopods 2 and 3. Peraeopods 4 and 5, 24 joint oblong oval, unusually 
narrow, 4!" moderately expanded, and deeurrent to middle of 5th. Uropod 3, 
peduncle with 4 spinules, nearly as long as ramus, of which the 2 joints are equal. 
Telson unarmed, oval, obtuse at apex. Colour pale carneous or yellowish. 
L. 9 nearly 6 mm. 


Hardangerfjord and Malangenfjord [Norway]. Depth 18 m. 


20. M. tenuimana 0. Sars 1892 M.t., G. O. Sars, Crust. Norway. ©.l p.259 
1,91 f.1. ' 


Body slender. Head, lateral corners angular. Side-plate 4 broader 
than deep, much larger than 2 and 3% combined. Pleon segment 3, postero-lateral 
corners much produced. Eyes round. Antennae 1 and 2 rather short. Antenna 1 
rather the longer, 1° joint much longer than 24, flagellum longer than 
peduncle, 9-jointed. Antenna 2, ultimate and penultimate joints of peduncle sub- 
equal, together as long as flagellum. Gnathopod 1, 6!" joint rather shorter than 5tk, 
tapering, without any armature to indicate a palm. Gnathopod 2 rather 
feeble, 6!" joint slenderly oblong triangular, widening distally, palm quite 
smooth, slightly oblique, defined by a tooth and spines. Peraeopods 1—5 nearly 
as in M. pusilla (p. 179), but rather less stout, though with 24 and 4 joints 
of peraeopod 5 more strongly developed. Uropod 3, peduncle with only an 
apical spinule, not longer than 1° joint of ramus, which has the 24 joint 
shorter than 1%. Telson with 1.or 2 pairs of lateral spines, oval, obtuse 
at apex. L. © 3 mm. 


North-Atlantie (West-Norway). 


182 Metopa, Metopella 


21. M.invalida O.Sars 1876 M. alderii (part.), A. Boeck, Skand. Arkt. Amphip., 
v.2 p.456 1.17 f.4,4k | 1892 M. invalida, G.O. Sars, ‚Crust. Norway, v.1 p. 267 t. 94 f.2. 


Body stout and compact. Head, lateral corners obtusely projecting. Side- 
plate 4 broader than deep, much larger than 24 and 34 combined. Pleon segment 3, 
lateral corners rather produced. Eyes round, bright red. Antennae 1 and 2 
subequal, short. Antenna 1, 1° joint shorter than 24 and 3% combined, flagellum 
scarcely as long as pedunele, 9-jointed. Antenna 2, ultimate and penultimate joints 
of pedunele subequal, flagellum scarcely longer than ultimate. Gnathopod 1, 
6'h joint as long as 5", narrow, tapering, with a single spine about in middle of 
hind margin. Gnathopod 2 rather feeble, 5tk joint widely eup-like, setose 
at rather produced apex, 6% oblong quadrangular, slightly dilated distally, 
palm nearly straight, quite smooth, slightly oblique, forming obtuse angle 
with hind margin. Peraeopods 1—5 rather slender, but 24 joint of peraeo- 
pod 5 rather broad, oval quadrangular, and 4" joint produced beyond middle 
of 5, Uropod 3, peduncle with 2 spinules, shorter than ramus, of which 
the joints are subequal. Telson unarmed, 3 times as long as broad, a little 
constrieted above, apex obtusely pointed. Colour pale greyish white, with 
transverse yellowish bands; ova bluish. L. © 4 mm. 


Aretie Ocean (Hammerfest and Selsövig [North-Norway]). Depth 74—92 m. 


2. Gen. Metopella 0. Sars 


1871 Metopa (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.140 | 1892 
Metopella, G. O. Sars, Urust. Norway, v.1 p.274 | 1893 Proboloides (part.) + Metopoides 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 907. 

Antennae 1 and 2 not very long nor very unequal, with or without 
accessory fagellum to-antenna 1. Mandibular palp, 3% joint small. Maxilla 1, 
palp (at least sometimes) 2-jointed. Maxillipeds, inner plates not very small, 
separate (at least sometimes), outer plates very small (mouth-organs ascertained 
for M. nasuta and M. nasutigenes). Gnathopod 1 simple or subchelate. 
Gnathopod 2 subchelate. Peraeopods 3—5, 24 joint little or not at all 
expanded. Uropod 3, pedunele shorter than ramus. 


6 species. 
Synopsis of species: 


1 { Antenna 1, 1st joint strongly produced over 24. — 2. 


Antenna 1, 1st joint not produced — 3. 
j Peraeon segment 4 conspieuously carinate . ... . 1. M.nasuta .. . p.182 
Peraeon segment 4 not conspieuously carinate . . 2. M. nasutigenes . p. 183 
8 pP y I 
3 f Peraeopod 5, 24 joint without expansion. . .. . 3. M.ovata. . . . p.183 
\ Peraeopod 5, 2d joint not without expansion — 4. 
| Peraeopod 5, 2d joint with convex expansion above 4. M.neglecta . . p.184 
\ Peraeopod 5, 2d joint with slight linear expansion —5. 
p J 8 P 
J Peraeon segment 4 carinate. .. -... 2... 5. M. carinata .. . p.184 
\ Peraeon segment 4 not earinate. . ». 2... 6. M. longimana . p.185 


1. M. nasuta (Boeck) ‘1871 Metopa n., A. Boeck in: Forh. Selsk. Christian., 
1870 p.144 | 1876 M.n., A. Boeck, Skand. Arkt. Amphip.. v.2 p.465 t.18 f,6 | 1887 
M. n.?, H. J. Hansen in: Vid. Meddel., ser. 4 vo.9 p.102 | 1893 M. n. (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p.637 | 1892 M.n., Metopella (part.), G. O. Sars, Crust. 
Norway, v.1 p.276 t.98 £.1. 


Body short, compact and firm. Peraeon segment 4 much the largest, 
with rounded dorsal carina. Head, lateral corners truncate.. Side-plate 2 


Metopella 


183 


with dentiele at lower hind corner, 4!" much larger than 24 and 32 combined. 
Pleon segment 3, postero-lateral angles subacute, segment 4 carinate, overarching 
segment 5. Eyes small, round. Antenna 1, 1° joint completely overlapping 24, 
flagellum 8-jointed. Antenna 2 rather shorter than antenna 1, ultimate and penulti- 
mate joints of peduncle subequal, flagellum 7-jointed. Maxilla 1, palp 2-jointed. 
Maxillipeds, inner plates separate. Gnathopod 1 feeble, 4% joint shorter than 5th, 
6! joint as long as 5t", almost linear. Gnathopod 2 of moderate size, 5th joint 
cup-like, 6!" oblong triangular, widening distally, palm a little oblique, eoarsely 
serrate, defined by a tooth and 2 spines. Peraeopods 1—5 very slender, 
none of the joints expanded. Uropod 3, peduncle armed with 1 spine, 
2 joints of ramus subequal. Telson narrow, linguiform, obtuse at apex, quite 
unarmed (Sars) or with 2 lateral spines. L. © 3—4 mm. 

Arctie Ocean, North-Atlantie and North-Sea (Norway, depth 94—188 m; ?Greenland, 
depth 72m; Firth of Clyde; Firth of Forth; Moray Firth). 


2. M.nasutigenes (Stebb.) 1888 Metopa n., T.Stebbing in: Rep. Voy. Challenger 
v.29 p.753 t.40 | 1893 M. nasuta (part.), Proboloides nasutigenes, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 637, 907, 945. 


Body compaet and firm. Peraeon segment 4 much the largest, slightly 
angled dorsally, not carinate. Head, lateral corners little produced. Side- 
plate 2 with serration of 4 points at bottom of hind margin, 4!" much larger 
than 24 and 3% combined. Pleon segment 3 almost quadrate, segment 4 with 
slight dorsal depression. Eyes round, not large. Antenna 1, 1° joint acutely 
produced beyond 24, 24 longer than 34, flagellum 10-jointed. Antenna 2 
rather shorter than antenna 1, ultimate joint of peduncle rather longer than 
penultimate, flagellum 8-jointed. Maxilla 1, palp 2-jointed. Maxillipeds, inner 
plates separate. Gmnathopod 1, 4! joint as long as 5t, 5tk much shorter 
than 6*%, almost eup-like, 6!" almost oblong, subchelate, with oblique, finely 
peetinate palm, defined by an obtuse angle and spines. Gmnathopod 2 not 
very unlike gnathopod 1, but larger, 4!" joint shorter than the cup-like 5t, 
6'h 3 times as long as broad, almost parallel-sided, palm almost smooth, 
defined as in gnathopod 1. Peraeopods 1—5 very slender, none of the 
joints expanded. Uropod 3, peduncle armed with 1 spine, 1 joint of ramus 
armed with 3 spines, rather longer than 24 joint. Telson long, with upturned 
sides, apex acute. L. © 45 mm. 


Cumberland Bay [Kerguelen Island], Depth 222 m. 


3. M. ovata (Stebb.) 1888 Metopa o., T.Stebbing in: Rep. Voy. Challenger, v.29 
- P-764 t.44 | 1895 M. o., Metopoides ovatus, A. Della 
Valle in: F. Fl. Neapel, v.20 p. 645, 907, 988. 


Head, lateral corners 
little produced. Pleon 
segment 3, postero- 
lateral corners sub- 
quadrate. Side-plate 2 
completely covering the 
15, 4! much larger than 
24 and 34 combined, 


Fig.47. M. ovata. 
Lateral view, 2. 


lete] änzEth Fig. 48. M. ovata. 
compietely Covermg9””, Peraeopod 2. 


6 and 7th (Fig. 47). 
Eyes round. Antenna 1, flagellum longer than peduncle, 10-jointed; a rudi- 
mentary 2-jointed accessory flagellum, as in Metopoides (p. 185). Antenna 2 


Re 
Er 


184 Metopella 


nearly as long as antenna 1, ultimate and penultimate joints of pedunele subequal, 
flagellum longer than pedunele, 10- or 11-jointed. Maxilla 1, palp 2-jointed. 
Maxillipeds, inner plates separate. Gnathopod 1 subchelate, 4!" joint produced 
along the short cup-like 5t", 6!" much longer than 4" or 5t", almost oblong, palm 
convex, not very oblique, very minutely pectinate, defined by a denticle and 
2 spines. Gnathopod 2 very similar to gnathopod 1, but larger, 6% joint longer, a 
little widened distally, palm smooth, convex, scarcely oblique. Peraeopods 1-—5 
(Fig. 48) slender, all joints linear, but 24 joint in peraeopods 3 and 4 (not in 5) 
a little wider above than below. Uropod 3, peduncle scarcely longer than 
1° joint of ramus, 24 of ramus rather shorter than 1°. Telson not twice 
as long as broad, apex narrow. L. about 3 mm. 


Strait of Magellan (Cape Virgins). Depth 100 m. 


4. M. neglecta (H. J. Hansen) 1876 Metopa longimana (part.), A. Boeck, 
Skand. Arkt. Amphip., ©.2 t.17 f£.5—5n | 1887 M. neglecta, H. J. Hansen in: Vid. 
Meddel., ser.4 0.9 p.96 t.3 f.9—9b | 1893 M. n., A. Della Valle in: F. Fl. Neapel, 
v.20 p.640 1.59 f.56 | 1892 M.n., Metopella (part.), G. O. Sars, Crust. Norway, v.l 
p. 274 t. 97 £.2. ve 


Body rather compressed, integument thin. Head, lateral corners sub- 
quadrate. Side-plate 4 larger than 24 and 3% combined. Pleon segment 3, postero- 
lateral angles somewhat produced. Eyes small, round. Antenna 1, flagellum 
scarcely as long as peduncle, about 8-jointed. Antenna 2 in Q subequal to 
antenna 1, in J rather longer, ultimate joint of peduncle shorter than penultimate, 
flagellum subequal to the latter. Maxilla 1, palp very long, 1-jointed (Boeck 
perhaps overlooked the division into 2 joints). Maxillipeds, inner plates 
separate (Boeck’s figure). Gnathopod 1, 4!" joint not much produced, 6! almost 
linear, not much shorter than 5t". Gnathopod 2, 5t" joint narrowly cup-like, 
6'h Jong and narrow, widening distally, palm rather oblique, curved, smooth, 
defined by a denticle and 2 spines. Peraeopods 1—5 extremely slender, 
only 24 joint in last pair at all expanded, and that only in the upper part. 
Uropod 3, peduncle armed with 2 spinules, joints of ramus subequal. Telson 
long and narrow, apex obtuse, 2 pairs of lateral spines. L. © 3 mm. 


Arctic Ocean, North-Atlantie and North-Sea (West-Norway; Greenland, depth | 
19—113 m). 


5. M. carinata (H. J. Hansen) 1887 Metopa c., H. J. Hansen in: Vid. Meddel., 
ser.4 v.9 p.99 t.4 f.3-—3e | 1895 M. c., A. Della Valle in: F. Fl. Neapel, v.20 p. 637 
t. 59 f. 49. 


Body deep, little compressed in Q, more so in d. Peraeon segment 4 
much the largest, with rounded dorsal carina, more elevated in O than in C. 
Side-plate 2 with subacute apex, 4 much larger than 24 and 34 combined. Eyes 
small, round. Antennae 1 and 2 subequal, very short and slenderin © ‚ thicker and 
longer ind. Antenna 2, ultimate and penultimate joints of pedunele subequal. 
Gnathopod 1 feeble, 6! joint twice as long as 5t", more slender, tapering. 
Gnathopod 2, 6% joint in Q large, widening distally, palm curved, a little oblique, 
defined by a long narrow projecting process; 6 joint in G longer and 
narrower, not dilated, palm very oblique, defined by a minute tubercle. 


Peraeopods 1—5, all joints slender, 24 in peraeopod 5 with slight linear 
expansion. L. © 3, C 2'1 mm. 


Arctic Ocean and North-Atlantie (Greenland). Depth 4—94 m. 


Metopella, Metopoides 185- 


m 6. M.longimana (Boeck) 1871 Metopal., A. Boeck in: Forh. Selsk. Christian., 

1870 p. 144 | 1876 M. I. (part.), A. Boeck, Skand. Arkt. Amphip., v. 2 p. 464 
t.17 £.6 | 1887 M.1., H.J. Hansen in: Vid. Meddel., ser.4 v.9 p.95 t.3 f:8—8b | 
1893 M.1., A. Della Valle in: F. Fl. Neapel, v.20 p.643 t.59 f£.61 | 1892 M.., Metopella 
(part.), G. O. Sars, Crust. Norway, o.1 p. 273 t. 97 £.1. 


Body strongly built, integument firm. Head, lateral angles acute. Side- 
- plate 4 unusually large, completely covering 5tt, 6! and 7%, Pleon segment 3 
- slightly produced, subquadrate. Eyes round. Antennae 1 and 2 subequal in ©, 
 antenna 1 the shorter in d. Antenna 1, flagellum 8-jointed. Antenna 2,.. 
ultimate joint of pedunele much shorter than penultimate. Gnathopod 1, 4 joint 
_ moderately produced, 6! decidedly shorter than 5t", almost linear. Gnathopod 2, 
6% joint in © nearly as in M. neglecta, but palm almost straight, slightly serrate,. 
defined by a decided tooth; in J larger, with 2 excavations in the palm 
near the tooth. Peraeopods 1—5 slender, throughout, only 24 joint of 5th 
- with slight linear widening. Uropod 3, pedunele with 2 spines, joints of ramus- 
- subequal. Telson oblong oval, obtuse at apex, with 2 pairs of lateral spines.. 
L. about 3 mm. 

E; Aretic Ocean and North-Atlantie (Greenland); North-Sea (Norway) and Christiania- 
-  $jord. Depth 72—-110 m. 


3. Gen. Metopoides Della Valle 
1893 Metopoides (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 907. 


Antenna 1 shorter than antenna 2, with very small 2-jointed accessory 
 flagellum. Mandibular palp, 34 joint small, with 2 apical setae. Maxilla 1, 
palp large, 2-jointed. Maxillipeds (Fig. 49), inner plates not very small,. 
- doubtfully separate, outer plates very small but apparent. Gmathopods 1 and 2 
-  (Fig.50) subchelate. Peraeopods 4 and 5, 2% joint expanded. Uropod 3, peduncle- 
shorter than ramus. 


3 species. 


ALT: a rn 
Ba a a a a a une 


Synopsis of species: 


Er. Peraeopods 3—5, 4th joint narrow . .. . . .- 1. M. magellanieus. . p.185 
E- N Peraeopods 3—5, 4th joint not narrow — 2. 

Sf Gnathopod 2, 6th joint elongate . .. .... 2. M. parallelocheir . p.186 

| Gnathopod- 2, 6th joint short . ....... 3. M. compaectus. . . p. 186: 


1. M. magellanieus (Stebb.) 1888 Metopa magellanica, T. Stebbing in: Rep. 
Voy. Challenger, v.29 p.756 t.41 | 1893 M. m., Metopoides magellanicus, A. Della Valle 
in: F. Fl. Neapel, ©.20 p. 644, 907, 938. 

Head, lateral angles little produced, obtuse. Side-plate 3 a little narrowed 
downward, 4! of equal breadth and depth, larger than 24 and 3% combined. 
Pleon segment 3, postero-lateral corners subquadrate. Eyes round. Antenna 1, 
34 joint longer than half 24, flagellum longer than peduncle, 13-jointed. 
Antenna 2, penultimate joint of peduncle long and slender, rather shorter than 
ultimate, flagellum 8- or 9-joimted. Maxillipeds, inner plates probably not 
separate except at apex, outer plates consisting of small apical processes on 
 joints of considerable length and width. Gmathopod 1, 5t% joint rather 
shorter than the oval 6%, palm very oblique, finely pectinate, defined by 
2 spines, to which the long finger reaches. Gnathopod 2, 5th joint much 
-  shorter than 6t%, cup-like, 6!" widest where the long oblique palm with 
‚elose row of spines meets the much shorter hind margin; finger long, curved. 
Marsupial plates almost eircular. Peraeopods 1—5, 4! joint long, scarcely 


\ 


186 | Metopoides 


decurrent, 24 joint more expanded in peraeopod 5 than in 4. TUropod 3, 
24 joint of ramus shorter than 1%. Telson twice as long as broad, distally 
tapering to acute apex, 3 spines on each margin. L. O0 5 mm. 


Strait of Magellan (Cape Virgins). Depth 100 m. 


2. M. parallelocheir (Stebb.) 1888 Metopa p., T. Stebbing in: Rep. Voy. 
‘Challenger, v.29 p.762 t.43 | 1893 M.p., Metopoides p., A. Della Valle in: F. Fl. Neapel, 
2.20 p. 642, 907, 938; t. 59 f. 59. 


Head, lateral corners little produced. Side-plate 3 of uniform breadth. 
Pleon segment 3, postero-lateral corners quadrate. Eyes round. Antenna 1, 
34 joint half length of 24, flagellum shorter than peduncle, about 8-jointed. 
Antenna 2 as in preceding species. Maxillipeds, inner plates not very 
large, probably not separate except at apex, outer plates triangular, on joints 
which are broad but not elongate. Gmathopod 1, 6!" joint rather long and 
narrow, palm almost smooth, extremely oblique and ill-defined except by 
ending of spine-row, finger finely pectinate, a dentiele at base of the nail. 
Gnathopod 2, 5t% joint cup-like, much shorter than the long hand, which 
has front and hind margins almost parallel, palm short but oblique, defined 
by a tooth and group of spines, finger short, curved. Peraeopods 1—5, 
4b joint rather long, wider and more decurrent in peraeopods 3-and 4 than 
in 1 and 2. Uropod 3, 2% joint of ramus a little shorter than 1%. Telson 
long oval, apex not very acute, 2 spines on each margin. L. 3:5 mm. 


Strait of Magellan (Cape Virgins). Depth 100 m. 


3. M. compactus (Stebb.) 1888 Metopa compacta, T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.767 t.45 | 1898 M.c., Metopoides compactus, A. Della Valle in: F. Fl. 
Neapel, v.20 p. 644, 907, 938. 


Head, lateral corners a little prominent. Side-plate 2 broad, semi- 
eircular, 34 oblong, 4" broader than deep. Pleon segment 3, postero-lateral 
corners obtusely quadrate. Eyes round. Antenna 1, 39 joint longer than 
half 24, flagellum shorter than peduncle, 10-jointed. 
Antenna 2 little longer than antenna 1, penultimate 
joint of pedunele rather longer than ultimate, flagellum 
8-jointed. Mandibular palp with 24 joint broader and 
34 a little more developed than usual in this family. 
Maxillipeds (Fig. 49), inner 
plates rather large. sepa- 
ration doubtful, outer plates 
apically rounded, the sup- 
porting joint almostas broad 
as long. Gnathopod 1, 4 
and 5% joints strongly armed 
with peetinate spines, 5th 
as long as 6%, which widens 
to-the convex, rather oblique, 
. finely pectinate and denti- 

Fig. 49. eulate palm, forming obtuse 6% 5% joint 
as sa ge angle with hind margin and ee 
defined by a row of spines; 
finger pectinate. Gnathopod 2 (Fig. 50), 5% joint cup-like, rather shorter than 
the stout oblong 6", palm very little oblique, sinuous, denticulate, defined 


Ze S a N Ta FEN 
Na 7 a kn KUBASE, an er Be Er 


. Metopoides, Proboloides 187 
by a small tooth. Marsupial plates almost eireular. Peraeopods 1—5 nearly 
as in M. parallelocheir. Uropod 2, rami less unequal than in 2 preceding 
species. Uropod 3, 24 joint of ramus much shorter than 1%. Telson very 
broad, though longer than broad, distally converging to an obtuse apex; 
3 small spines on each margin. L. © 35 mm. 


Strait of Magellan (Cape Virgins). Depth 100 m. 


4. Gen. Proboloides Della Valle 


1871 Metopa (part.), A. Boeck in: Forh, Selsk. Christian., 1870 p.140 | 1898 
Proboloides (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 907. 


_ Antennae 1 and 2 subequal. not large; antenna 1 without accessory 
flagellum or by exception perhaps with rudiment. Mandibie, molar wanting, palp 
slender, 3-jointed, apical joint small. Maxilla 1, palp large, 2-jointed. 
Maxillipeds, inner plates separate, usually not very small, outer plates very 
small or obsolete. Gnathopod 1 more or less subchelate. Gnathopod 2 
 distinetly subchelate in ©, in C powerful, with palm defined or undefined. 
-  Peraeopods 3—5, 4% joint usually expanded and produced, 2% joint expanded 
in peraeopods 4 and 5, not or scarcely in peraeopod 3. 


Br 7 species accepted, 1 doubtful. 


Synopsis of accepted species: 
1 f Peraeopod 3, 4th joint rather narrow . . . . 1. P.grandimanus. .. p. 187 
\ Peraeopod 3, 4th joint rather broad — 2. 


 Gnathopod 2 in Z, palm undefined or imperfeetly 
defined — 8. 
Gnathopod 2 in 3, palm well defined — 6. 


2 


[ Peraeopod 3, 2d joint distally widened . . . 2. P. crenatipalmatus . ‚p. 188 
Peraeopod 3, 2d joint not widened — 4. 
ä | Gnathopod 2, palm quite smooth. ... . . 8. #, bruselil „=. ... p. 188 
Gnathopod 2, palm not quite smooth — 5. 
[ Gnathopod 2, palm eonspieuously dentate . .- 4. P. gregarius . . . . p.189 
Gnathopod 2, palm ineonspiceuously dentate . 5. P. calearatus . . . . p.189 
3» Be I Gnathopod 2, 24 joint broad. ....... 9 Piglaclalie..; 4075 p. 189 
=“ Gnathopod 2, 2d joint narrow .-. » »... . 7. P.groenlandiceus . . p.190 
1. P.grandimanus (Bonnier) 1896 Probolium grandimanum, J. Bonnier in: 
Ann. Uuiv. Lyon, v.26 p. 638 t.37 f. 4. 


fa © unknown. —d. Head without rostrum. Side-plate 1 much more deve- 
-  _ Joped than usually in this family, subtriangular, 24 considerably smaller, 
_ with acute apex directed forward, 34 and 4! large- Pleon segment 3, 
postero-lateral corners rounded. Eyes small, round. Antenna 1, 1° and 
24 joints long, equal, 34 very short, flagellum with more than 12 joints. Antenna 2, 
ultimate joint of peduncle rather shorter than the long penultimate, flagellum 
with more than 10 joints. Epistome very acute. Upper lip bilobed. Mandible 
small, but these and other mouth-parts in accord with generic character. 
Maxillipeds, outer plates quite wanting. Gmathopod 1, 4" joint well produced, 
obtuse at apex, 5!" longer than 6", 6th distally widened, subchelate. Gnatho- 
-  pod 2, 24 joint channelled in front, 4!" joint apieally acute, 5tk short, eup- 
4 shaped, 6'h Jarge, elongate, having near the hinge of finger 4 small teeth, 
only that most remote from hinge acute, the rest of the margin nearly 


188 Proboloides 


straight, fringed with setules, finger as long as 6 joint, with setules om 
inner margin. Peraeopod 3, 24 joint narrow, 4!" scarcely widened distally. 
Peraeopods 4 and 5, 24 jointwidely expanded, 4! moderately produced. Uropod 1, 
rami equal, one with 2, the other with 4 spines. Uropod 2, outer ramus 
shorter than inner, with 1 spine. Uropod 3, ramus with 2 lateral spines, 
24 joint shorter than 1%. Telson with 1 pair of minute and 2 pairs of 
stout lateral spines. L. less than 5 mm. 


Bay of Biscay. Depth 950 m. 


2. P. cerenatipalmatus (Stebb.) 1888 Metopa crenatipalmata, T. Stebbing in: 
Rep. Voy. Challenger, 0.29 p.759 t.42 | 1893 M. c., Proboloides erenatipalmatus, A. Della 
Valle in: F. Fl: Neapel, ».20 p.907, 945. 


Head, lateral corners very obtuse. Side-plate 4 scarcely equal to 24 and 
34 combined. Pleon segment 3, postero-lateral corners subquadrate. Eyes round. 
Antenna 1, 1° joint not longer than 24, flagellum longer than peduncle, 
about 12-jointed; perhaps a rudimentary accessory flagellum present. Antenna 2, 
ultimate joint of pedunele slightly longer than penultimate, flagellum 8-jointed. 
Mandibular palp with 24 joint long, 34 scarcely longer than 1°, carrying 
l or 2 apical setae. Gnathopod 1, 4 joint not much produced, apically 
spinose, 5tR nearly as long as 6!" and rather broader, palm of 6{ oblique, 
finely cerenulate, finger finely pectinate on inner margin. Gmathopod 2, 
5th joint cup-like, 6" oblong oval, palm crenulate in 2 divisions, rather 
oblique, defined by a sharp tooth, finger broad, smooth on inner margin. 
Peraeopod 3, 24 joint distally lobed behind, 4" broad, a little decurrent. Peraeo- 
pods 4 and 5, 2% and 4!" joints expanded, 4 moderately decurrent. Uropod 3, 
peduncle a little shorter than ramus, with 4 spines; 24 joint of ramus 
rather longer than 1°. Telson long oval, obtusely pointed, 3 spines on 
each margin. L. © 6 mm. 

Strait of Magellan (Cape Virgins). Depth 100--270 m. 


3. P. bruzelii (Goes) 1866 Montagua b., Go&s in: Öfv. Ak. Förh., u.22 p. 522 
t.38 f. 10 | 1886 Metopa b., G. O. Sars in: Norske Nordhavs-Exp., v.6 Crust. II p. 484 
1887 M.b. (part.), «H. J. Hansen in: Vid. Meddel., ser.4 ©.9 p.97 t.4 f.2e,d | 1892 
M.b., G.O, Sars, Crust. Norway, v.1 p. 261 t. 92 £.1. 


Body slender and rather compressed. Head, lateral corners angular. Side- 
plate 4 much larger than 24 and 3X combined. Pleon segment 3, postere-lateral 
angles rather acute than quadrate. Eyes round, dark red. Antennae 1 and 2 sub- 
equal. Antenna 1, 1° jointlongerthan 24 and 3% combined, flagellum longer than 
peduncele, about 12-jointed. Antenna 2, ultimate and penultimate joints of pedunele 
subequal, and together subequal to flagellum. Maxilla 1 (Go&s) with 2-jointed 
palp, 1° joint large. Maxillipeds (Goös), inner plates rather small, separate, 
outer quite obsolete. Gmathopod 1, 4th joint rather broadiy produced, 6% 
narrower than 5", equal to it in length, tapering distally, smooth. Gmatho- 
pod 2, 6! joint oval, palm quite smooth, rather oblique, defined by a slight 
angular projection and 2 spines; alike in G and 9, but larger in C. 
Peraeopods 2—5 rather stout, 24 joint broadly expanded in peraeopod 5, 
and 4 produced below- the middle of the 5'". Uropod 3, peduncle nearly 
as long as ramus, with 4 spines, 24 joint of ramus nearly as long as 1*, 
Telson long oval, tapering to acute apex, 2 pairs of lateral spines (Sars), 
3 pairs and a blunt apex (Go&s). Colour whitish, with a few orange patches; 
ova bluish. L. 4 mm. 

Aretie Ocean and North-Atlantie (Spitzbergen, Greenland, Norway). Depth 
56—113 m. 


‚2 ST a 
Ay 
Se EN ee I 


fi Eee ne 20 ATTEN 


Proboloides 189 


4. P. gregarius (O.Sars) 1882 Metopa gregaria, G. ©. Sars in: Forh. Selsk. 


m Christian., nr. 18 p.93 t.4 £.6,6a | 1892 Probolium gregarium, G.O.Sars, Crust. Norway, 
-  =@.1p.245 t.84 | 1893 Metopa gregaria, Proboloides gregarius, A. Della Valle in: F. Fl. 
Neapel, v.20 p. 643, 907, 945; t.59 f. 62, 63. 


Head, lateral corners nearly rectangular. Side-plate 4 subequal to 24 and 


34 combined. Pleon segment 3, postero-lateral angles somewhat produced. Eyes 
-  rounded oval, well developed, dark red. Antenna 1, 1° and 24 joints subequal 
- in length, flagellum longer than pedunele. Antenna 2, ultimate joint of peduncle 


rather shorter than penultimate. Lower lip, inner plates coalesced. Mandibular 


E palp very slight, 34 joint minute. Gnathopod 1, 4 joint considerably 


produced, 5tt and 6% joints subequal, palm convex, undefined. Gnathopod 2inO, 


6b joint oblong oval, palm erenulate in 2 divisions, oblique, defined by a 
- ‚distinet angle armed with a spinule; in S much larger, much narrower in 


projeetion to length, the hind margin or palm pubescent, nearly straight, 


- interrupted by 2 denticles and ending in a finely serrate apical expansion, 


finger very long, eiliated on inner margin. Peraeopods 3—5, 4 joint broad, 


- _ decurrent, in the 5tk peraeopod greatly; 24 joint linear in 34, broadly oval 


-  jm 4th, obliquely rounded in 5t. Uropod 3 rather short and stout, peduncle 


a little longer than ramus, with 6 spines, 24 joint of ramus shorter than 1°. 
Telson twice as long as broad, apex acute, 4 spines on each margin. Colour 
whitish, pellueid, with orange patches. L. © 5, S 6 mm. 


North-Atlantie (Norway). Depth 75—188 m. 
5. P. calearatus (O. Sars) 1882 Metopa calcarata, G. O. Sars in: Forh. Selsk. 


Christian., nr. 18 p.92 t.4 f.5,5a | 1892 Probolium calcaratum, G. ©. Sars, Crust. 
Norway, v.1 p.247 t.85 | 1893 Metopa bruzelüi (part.), M.calcarata, Proboloides calcaratus, 


A. Della Valle in: F. Fl. Neapel, v.20 p. 641, 907, 945. 


Head, lateral corners angular in O ‚more rounded in J. Side-plate 4 searcely 
as broad as 2 and 3% combined. Pleon segment 3, postero-lateral angles rather 
produced. Eyes very large, oval quadrangular, imperfectly developed, bright red. 


 Antenna 1, 1° joint longer than 24, flagellum little longer than peduncle. 


Antenna 2, ultimate joint ofpeduncle rathershorter than penultimate. Gnathopod 1 


 asin P.gregarius. Gnathopod 2in O , 6 jointtriangular oval, palm oblique, nearly 


straight, slightly serrated, defined by an obtuse angle with 3 spinules, finger 
of moderate size; in S, 6% joint very long, palm nearly as in P. gregarius, 
but rather concave and without the 2 denticles, finger long and ciliated. 
Peraeopods 3—5 more robust than in P. gregarius, the 4" joint more strongly 
decurrent. Uropod 3, pedunele as long as ramus, 5 spines. Telson comparatively 
shorter and broader, 3 spines on each margin. Colour uniformly whitish, ova 


4 ‚reddish. L.o 5, d 6 mm. 


North-Atlantie (Norway). Depth 150—282 m. 


6. P. glacialis (Kroyer) 1842 Leucothoe g., Kroyer in: Naturh. Tidsskr., v.4 


pP 159 | 1846. L.g., Kroyer in: Voy. Nord, Crust. t.22 f.3a—p | 1862 Montagua g., 


Bate, Cat. Amphip. Brit. Mus., p.58 t.9 £.3 (inaceurate) | 1871 Metopa g., A. Boeck in: 
Forh. Selsk. Christian., 1870 p.141 | 1887 M.g., H. J. Hansen in: Vid. Meddel,, ser. 4 
0.9 p.98 t.3 f.6,6a | 1893 M.g., A. Della Valle in: F. Fl. Neapel, v.20 p.639 t.59 f.54. 


Side-plate 4 not as broad as 24 and 39 combined. Pleon segment 3, postero- 


lateral eorners bluntly subquadrate. Eyes small, round, dark. Antenna 1, 1° joint 


slightly longer than 24, flagellum shorter than pedunele, 10-jointed. Antenna 2 


j _ scarcely shorter than antenna 1, ultimate joint ofpeduncle a little shorter than pen- 


ultimate, longer than 6-jointed flagellum. Maxilla 1, 1° joint of palp unusually 


190 Proboloides, Metopidarum species dubia, Cressidae 


large. Maxillipeds, inner plates distinetly separate and outer altogether wanting. 
Gnathopod 1 small but rather strong, 5% joint broadiy and stoutly oval, 
6% shorter and much narrower, widening distally to a transverse palm, which 
is slightly overlapped by the finger. Gmathopod 2 large, 24 joint rather 
short but unusually broad, 6!" longer than 24, oblong, palm defined by a 
slender outstanding tooth, within which it is erenulate, then forming a denticle 
and a larger tooth over which the strong finger eurves. Peraeopods 1—5 
agreeing with the generie character. Uropod 3, peduncle shorter than the 
2-jointed ramus. Telson long oval, without spines. Colour whitish-yellow. 
L. 7—8 mm. 


Aretie Ocean and North-Atlantie (Spitzbergen, Greenland, Iceland). 


7. P. groenlandicus (H. J. Hansen) 1887 Metopa groenlandica, H.J. Hansen 
in: Vid. Meddel., ser. 4 v.9 p.94 t.3 f.7—Te | 1893 M.g., A. Della Valle in: F. Fl. 
Neapel, v.20 p.640 t.59 f. 55. Era 

Very near to P. glacialis (p. 189), but side-plates deeper, 4! larger than 
24 and 34 combined. Antenna 1 in J, 24 joint longer than 1°, a little shorter 
than flagellum. Mouth-organs not described. Gmathopod 2, 24 joint not 
unusually wide, 6!% with a deep and broad sinus in the palm between the 
defining process and a smaller tooth forming a subobtuse angle with the 
serrate portion near the hinge of the finger. Gnathopod 2 in Q, 6% joint 
oval, a convex serrate palm sloping to a small tooth. Peraeopod 5, 24 joint 
much dilated, 4% little L. 9 8'4, © 7'5 mm. 


Arctic Ocean and North-Atlantie (Greenland). 

P. sarsii (Pfeff.) 1888 Metopa s., Pfeffer. in: Jahrb. Hamburg. Anst., v.5 p.84 
t.2 f.3,8; t.3 f.2 | 1895 M. s., A. Della Valle in: F. Fl. Neapel, 0.20 p. 645. 

L. 3 mm. 

South-Atlantie (South Georgia). Low tide. 


Metopidarum species dubia. 
Metopa normani Hoek 1889 M.n., Hoek in: Tijdschr. Nederl. dierk. Ver., 
ser.2 v.2 p.190 t.7 £.5, 5‘. 


Said to be near to Metopella longimana (p. 185), but being nearer to Metopoides 
parallelocheir (p.186). L. 4:8 mm. 


North-Sea (Dutch coast). Depth 24 m. 


10. Fam. Cressidae 
1899 Cressidae, T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p.210. 


Side-plate 1 rudimentary, 24 to 4 Jarge but normal in shape. Upper 
lip bilobed. Lower lip with inner lobes coalesced. Mandible, ceutting edge 
dentate, molar weak, palp elongate, 34 joint long. Maxilla 1, palp 1-jointed. 
Maxilla 2, inner plate very small. Maxillipeds, inner plates separate, outer 
small but distinet. Gnathopod 1 simple. Gnathopod .2 subchelate. Peraeo- 
pods 3—5, 24 joint expanded. Uropods 1 and 2, rami very unequal. Uropod 3 
with a single 2-jointed ramus. Telson coalesced with pleon segment 6. 


Marine. 


l genus, 3 species. 


191 


1. Gen. Cressa Boeck 


e 1857 Danaia (Sp. un.: D. dubia) (non H. Milne Edwards & Haime 1855, Anthozoa!), 
 Bate in: Ann. nat. Hist., ser.2 v.19 p.137 | 1871 Cressa, A. Boeck in: Forh. Selsk. 

- Christian., 1870 p.145 | 1890 C., J. Bonnier in: Bull. sei. France Belgique, v.22 p.186, 191 | 
1892 C., G. O. Sars, Crust. Norway, v.1 p.277 | 1893 C., A. DellaValle in: F. Fl, 
Neapel, v.20 p.580. 


* Antenna 1 much longer than antenna 2. Gmathopod 1 slender and 
feeble. Peraeopods 1—5 slender. Telson acute at apex. 


3 species. 


Synopsis of species: 


FE 1 Some of the segments dorsally dentate .. . .. . 1. C.dubia „ . . p.19t 
Be None of the segments dorsally dentate — 2. 


E 9 EN SE RE Pr RN 2. C.minuta .. p.192 
3 ran Wann: a en es ga a e 3. C. abyssicola , p. 192 


1. C. dubia (Bate) 1856 Montagua dubius (nom. nud.), Bate in: Rep. Brit. 
Ass., Meet. 25 p.57 | 1857 Danaia dubia, Bate in: Ann. nat. Hist., ser.2 v.19 p. 137 | 
1876 D.d., T. Stebbing in: Ann. nat. Hist., ser.4 v.18 p.444 t.19 f.2 | 1888 Cressa d., 
#8 T.Stebbing in: Rep. Voy. Challenger, v.29 p.293 | 1890 C.d. (part.), J. Bonnier in: 
Bull. sei. France Belgique, v.22 p. 186 t.10 | 1892 (©. d., G. O. Sars, Crust. Norway, ».1 
© p».278 1.98 f.2; t.99 f.1 | 1893 C.d. (part.), A. Della Valle in: F. Fl. Neapel, ».20 
 p.581 t.58 f.85 | 1871 C. schiodtei, A. Boeck in: Forh. Selsk. Christian., 1870 p. 145. 


Head, lateral corners acutely produced, with a small tooth below and 
‚to the rear of the prineipal projection. Peraeon segments 6 and 7 and pleon 
- segments 1 and 2 produced backward in a curved tooth. Side-plates 2 and 3 
with 4 or 5 coarse serrations eurving forward at lower hind corner; 4! 
emarginate behind, angle of emargination acute. Pleon segment 3, postero- 
lateral corners much produced. Eyes large, oval, dark red. Antenna 1, 1° joint 
long, rather longer than 24, both triangularly produced at apex, flagellum 
- _slender, twice as long as peduncle, 20-jointed; in JS longer than in ©, with 


long sensory setae on flagellum. Antenna 2 much shorter and more slender 


than antenna 1, ultimate joint of peduncle shorter than penultimate; flagellum 
- rather longer than pedunele. Lower lip not easily disseeted ont (see the greatly 
-  differing figures by Bonnier and Sars). Mandible with accessory plate, a 
- minute fringe representing spine-row, and a smooth projeetion answering to 
molar, long 34 joint of palp finely furred. Maxilla 1, inner plate without 
 setae, outer probably with 6 spines, palp elongate, 1-jointed (in Boeck’s figure 
- —  2-jointed). Gmnathopod 1, 6! joint nearly linear, shorter than the long, 
narrow 5b, Gmathopod 2, 5*h joint narrowly cup-shaped, 6 subtriangular, 
constricted at base, much widened distally, palm little ”oblique, fringed with 
spinules, defined by a tooth. Peraeopods 1—5 very slender, 24 joint in peraeo- 
pods 3—5 oblong oval, obliquely truncated at lower hind corner. Uropods land 2, 
rami narrow, acute, constrieted towards the end and furnished with 2 spines 
at the constrietion. Uropod 3, peduncle broad at base, produced at apex, 
longer than ramus, of which the 1° joint is twice as long as 24 and carries 
2 apical spines. Telson ending in an acute piece flanked on each side of 
its base by an acute little tooth (not shown in Bonnier’s figure). Colour 
dark brown, spotted. L. © 3 to about 6 mm, S much less (Sars). 


North-Atlantie and North-Sea (Norway, depth 36—146 m; France; Great Britain). 


N en EEE IN 2 a 
an Sr eh ser = 


192 Cressa, Stenothoidae, Stenothoe 


2 C. minuta Boeck 1871 C. m., A. Boeck in: Forh. Selsk. Christian., 1870 
p. 146 | 1876 C. m., A. Boeck, Skand. Arkt. Amphip., v.2 p.469 t.18 f.7 | 1892 CO. m., 
-G. O. Sars, Crust. Norway, v.1 p.280 t.99 f.2 | 1885 Danaia m., G. O. Sars in: Norske 
Nordhavs-Exp., v.6 Crust. I p. 190 | 1890 Cressa dubia (part.), J. Bonnier in: Bull. 
sci. France Belgique, v.22 p. 186 | 1893 C.d. (part.), A. Della Valle in: F. Fl. Neapel, 
.v.20 p. 581. 


In general resembling C. dubia (p. 191). Back not dentate, though the 
imbrication of the segments may produce the appearance of dentation. Head, 
lateral corners acutely produced, with no inferior dentiele. Side-plates 2 and 3 
with a single tooth ceurving forward at lower hind corner, 4! with angle of 
‚emargination not very acute. Pleon segment 3, postero-lateral angles 
moderately produced. Eyesrather small, round. Antennal, flagellum 12-jointed. 
‘Gnathopod 1, 6" joint little more than half length of 5t", Peraeopods 3—5, 
‚24 joint regularly oval, not truneate at lower hind corner. L. © 3—5 mm. 


North-Atlantie and North-Sea (Norway, Firth of Forth). 


3. C. abyssicola O. Sars 1879 ©. a., G. O.Sars in: Arch. Naturv. Kristian. 
v.4 p.453 | 1892 C.a., G.O. Sars, Crust. Norway, v.1 p.278 | 1885 Danaia a., G. 0. 
Sars in: Norske Nordhavs-Exp., 0.6 Crust.I p. 190 t.16 f.1, 1a | 1890 Oressa dubia (part.), 
-J. Bonnier in: Bull. sei. France Belgique, v.22 p.186 | 1893 C. d. (part.), A. Della Valle 
in: F. Fl. Neapel, v.20 p. 581. 


In several respeets agreeing with C.dubia(p.191). Body compact, notdorsally 
‚dentate. Head, lateral corners acutely produced. No eyes. Antenna 1 longer 
than the body, 1° and 24 joints not apically produced. Antenna 2 scarcely 
half length of antenna 1. Gnathopod 2, 5" joint narrowly produced, 6!" large, 
palm almost transverse and straight, with a regular series of 8 spines on 
‚either side. Peraeopods 3—5, 24 joint regularly oval. Colour whitish. 
L. 6 mm. 


Arctie Ocean (between Finmark and Beeren Island, depth 841 m; Greenland, 
‚depth 376 m). 


11. Fam. Stenothoidae 


1871 Subfam. Stenothoinae, A. Boeck in: Forh. Selsk. Christian., 1870 p. 188 | 
1888 Stenothoidae, T. Stebbing in: Rep. Voy. Challenger, e.29 p.747 | 1892 S.,, 6.0. 
-Sars, Urust. Norway, v.1 p. 234. 


Agreeing with the Metopidae (p. 171), except in some points of the 
mouth-organs. Lower lip with the inner lobes rudimentary, separate. Mandible 
without molar or palp. Maxilla 1, palp 2-jointed. Maxillipeds (Fig. 51 p. 193), 
inner plates small, separate, outer obsolete. Peraeopod 3, 24 joint perhaps 
sometimes, but generally not, expanded ; peraeopods 4 and 5 with 24 joint expanded. 


Marine. 


1 genus, 15 accepted species and 3 doubtf£ul. 


1. Gen. Stenothoe Dana 


1852 Stenothoe, J.D. Dana in: Amer. J. Sci., ser.2 v.14 p.311 | 1853 $. (Sp. un.: 
S. validus), J. D. Dana in: U, S. expl. Exp., v.13u p. 923 | 1888 $., T. Stebbing in: 
Rep. Voy. Challenger, v.29 p.748 | 1892 S., G. O. Sars, Crust. Norway, v.1 p.235 | 1893 
-S., A. Della Valle in: F. Fl. Neapel, v.20 p.564 | 1853 Probolium (Sp. un.: .P. polyprion), 


a 


- 


Stenothoe 193 


A.Costa in: Rend. Soc. Borbon., n. ser. v.2 p.170 | 1856 Montagua (non Leach 1813/14, 
- Decapoda!), Bate in: Rep. Brit. Ass., Meet.25 p.57 | 1857 M. (part.), Bate in: Ann. 

nat. Hist., ser.2 v.19 p.137 | 1871 Metopa (part.), A. Boeck in: 
Forh. Selsk. Christian., 1870 p.140 | 1883 Montaguana, Chilton 
in: Tr. N. Zealand Inst., v.15 p.78. 

Antennae 1 and 2 usually subequal, flagellum long 
in antenna 1, peduncle in antenna 2. Mandible, molar 
evanescent. Maxilla 1, palp large. Maxillipeds (Fig. 51), 
inner plates very small, outer evanescent or wholly 
absent, palp elongate, 4tk joint ciliated on concave margin. 
 Gmnathopods 1 and 2 more or less distinetly subchelate. 
_ Gmathopod 1, 4 joint produced into a lobe along side 
of the 5th (except in S. peltata, p. 194). Gmathopod 2, 
6 joint powerful, usually differing to some extent in 
the 2 sexes. _ Peraeopod 3, 24 joint linear (except in _ Fig. 5ı. 


8 valida, p. 194). larinipeds. 

Be 15 species accepted, 3 obseure. 

4 Synopsis of accepted species: 

e: i | Back earmnle 0. u. a 1. 8. richardi . . . . p.194 
ei: Back not carinate — 2. 

E Peraeopod 3, 24 joint expanded ....... 2 BR valide... p. 194 
:- 2 N Peraeopod 3, 2d joint not expanded — 8. 

3 3 f Gmathopod 1, 4th joint not-distinetly produced 3. 8. peltata . . . . p.194 
E. | Gnathopod 1, 4th joint distinetly produced — 4. 

& ä [ Gnathopod 1, 2d joint strongly bent at base . 4. S. antennulariae . p.195 
= Gnathopod 1, 2d joint straight — 5. 

BR „ f Uropod 3, 2d joint of ramus genieulate. ... 5. 8.ceattai ... .. p- 195 
E { Uropod 3, 2d joint of ramus straight — 6. 

4 Gnathopod 2, palm with a single deep excavation 6. S.elypeata. ... . p.195 
# 6 Gnathopod 2, palm with more than one or with 

no excavation — T. 
Uropod 3, peduncle much shorter than ramus — 8. 

5a 7 Uropod 3, peduncle longer or scarcely shorter 

@ than ramus — 9. 

E Gnathopod 2, 6th joint subquadrate, palm slightly 

R: 8 en ER RESET 7. S. monoculoides . p. 196 
B Gnathopod 2, 6th joint elongate, palm extremely 
E Ge ne Re 8. S.dollfusi . . . . p.196 
Ri: | Peraeopods 3—5, 4th joint narrow and little 

9 produced —- 10. 


| Peraeopods 3—5, 4th joint widened and produced — 11. 


Antennae 1 and 2 of considerable length, palm 

#2 10 | of gnathopod 2 in d not deeply ineised. . 9. 8.tenella. .... p- 196 
E. Antennae 1 and 2 extremely long, palm of gnatho- er 

2 pod 2 in 5 deeply ineised . ....... 10. 8. megacheir . . . p. 197 
5 1 | DE GV ee en. 11. 8. mierops . . . . p. 197 
e Eyes well developed — 12. 

EB 19 ! Gnathopod 2 in , palm dentieulate throughout 12. 8. marina . . . . p.198 
B- Gnathopod 2 in 3, palm dentieulate only at apex 13. 8. bosphorana*) . p.198 
RE 13 ! Gnathopod 2 in Q, palm defined. ...... 14. S. brevicornis . . p.199 

& | Gnathopod 2 in 2, palm undefined. .... .» 15. S. adhaerens.. . . p.199 


*) S. bosphorana 2 is distinguished from $. brevicornis 2 by the gnathopod 2 
with palm ill-defined, and from S. adhaerens 2 by the gnathopod 1 with 4th joint not 
“ produced to apex of 5th, In S. marina the telson has 2 spines on each side, in 

S. adhaerens 4, in S. brevicornis none. 
Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 13 


Br et: a2 he a a N BE I AN a ee a 
aa year alt Eh An Et 2 E 


194 Stenothoe 


1. 8. richardi Chevreux 1895 S. »., Chevreux in: M&m. Soe, zool. France, 
v.8 p.432 f. 


Head, lateral angles broadly rounded, rostrum little eurved. Body 
much compressed, dorsal carina produced into a tooth on each segment 
from 39 of peraeon to 3% of pleon. Side-plate 2 irregularly pentagonal, 
4th wider than deep, rounded behind. Pleon segment 3, postero-lateral 
angles strongly produced, sharply uncinate. Eyes very "large, round. Antenna 1, 
1% and: 24 joints subequal, 34 very short, flagellum 18-jointed. Antenna 2. 
ultimate joint of peduncle rather longer than long penultimate, flagellum very 
short, 10-jointed. Maxillipeds, ultimate joint of palp longer than penultimate. 
Gnathopod 1, 4% joint not quite reaching apex of 5th, 6th Jong oval, rather 
longer than 5". Gmathopod 2, 6! joint broadest at base, where there is 
a small spinous protuberance, reached by long finger eurving over crenulate 
palm. Peraeopod 5, 24 joint exceptionally broad and expanded. Uropod 3, 
peduncle much longer than ramus, of which 24 joint is rather longer than 
ea Telson broadiy oval, 4 spines on each side, one median, a acute. 

.d 5 mm. 


Bay of Biscay (lat. 47° N., long 8° W.). Depth 748—1262 m. 


2. S. valida Dana 1852 S., J. D. Dana in: Amer. J. Sei., ser.2 ..14 p.311" 
1853 & 55 S. validus, J.D. Dana in: U. S. expl. Exp., v.1311 p.924; t. 63 f.1a— 0 | 1893 
S. valida (part.), A. Della Valle in: F. Fl. Neapel, ©.20 p.566 t.58 f. 74—-78 | ?1853 
Probolium polyprion, A. Costa in: Rend. Soe. Borbon., n. ser, e.2 p. 173 | 1876 Steno- 
thoep., A. Boeck, Skand. Arkt. Amphip., v.2 p.446 | 1866 Probolium megacheles, Cam. Heller 
in: Denk: Ak. Wien, ©. 26n p.13 t.2 f£.1,2. 


Eyes small, round. Antennae 1 and 2 nearly equal; antenna 1 as figured 
is the shorter in O, the longer in 0. Antenna 2, ultimate joint of peduncle 
shorter than penultimate. Gnathopod 1, 4" joint longer than 5th, its base 
in S longer, in 9 shorter, than the produced part, 6% narrow oval, finger 
(as figured) much larger in J than in ©. Gnathopod 2, 4! and 5t% joints 
short, 6 in JS very large, oblong, margins nearly parallel, an obtuse 
tooth at lower apex, finger long and stout, hind margin of hand partiy 
pubescent (Costa: minutely serrate); in the © this joint is rather smaller, 
more oval, with a small tuberele in place of the tooth, finger shorter and 
less powerful. Peraeopods 3—5, 24 joint well expanded, 4 joint moderately 
so. Uropod 1 extending beyond uropod 2, and uropod 2 beyond uropod 3. 
Uropod 3 (as figured) has peduncle stout, rather shorter than ramus, of 
which 24 joint is longer than 1°. Telson apparently carrying 3 lateral 
spines. L. 6—8 mm. | 


Tropical Atlantie (Rio Janeiro); Mediterranean? 


3. S. peltata S. I. Sm. 1876 S.p., S.I. Smith (& Harger) in: Tr. Connect. 


Ac., ©.3 p.29 t.3 f.5—8 | 1893 S.p., A. Della Valle in: F. Fl. Neapel, v.20 p. 570. 


Side-plate 3 deeper, not wider than 2%, 4 as wide (or long) as 
length of peraeon segments 1—5. Eyes round, nearly white in spirit. 
Antenna 1 in ©, flagellum 8-jointed, scarcely longer than peduncle. Antenna 2 
rather longer than antenna 1, ultimate and penultimate joints of pedunele 
subequal, flagellum subequal to that of antenna 1. Gnathopod 1, 4 joint 
triangular, distally broader than 5*h, 5th parallel-sided, 6 narrower but 
slightly longer than 5t", distally narrowed, finger about half aslong. Gnatho- 
pod 2, 6% joint nearly twice as long as broad, palm convex, slightly oblique, 


DE a ST Hera 


Stenothoe 195 


‚defined by an acute lobe within which tip of finger closes. Peraeopods 1 and 2 
 slender. Uropod 3, ramus slightly longer than peduncle. L. Q about 6 mm. 
North-Atlantie (St. George’s Banks [United States of America]). Depth 55 m. 


4. S. antennulariae Della Valle 1893 S.a., A. Della Valle in: F. Fl. Neapel, 
0.20 p.565 t.30 f.1—18 ! 1896 8. crassicornis (part.), A. O. Walker in: Rep. Brit. Ass., 
- Meet. 66 p.420 | 1897 S$.c., A. O. Walker in: J. Linn. Soec., 0.26 p.229 t.18 f.3—3e. 


Body robust. Side-plate 1 very small, 4% large, subtriangular; depth 
and width subequal. Eyes small, eircular, rosy. Antenna 1, 1° and 24 joints 
equal in length, flagellum with 7—11 slender Joints. Antenna 2, ultimate and 
- penultimate joints of peduncle equal, flagellum short, 6- or 7-jointed. Maxillipeds, 
inner plates exceedingly small, outer quite wanting, palp slender. Gnatho- 
pod 1. 24 joint notably bent at the base, 4!" not nearly reaching apex of 
 5ih, Gh oval, rather longer than 5t%. Gmathopod 2, 4 and 5th joints short, 
5b wide distally, 6 much larger in J than in 9, in © having the palm 
defined at some distance from the base by a tooth to which the long finger 
reaches eurving over another tooth or projection much nearer the hinge, 
(this projeetion being subdivided in J as well as in oO: Walker); 6th joint 
in © almond-shaped, with some slight teeth at intervals over which the 
 moderately sized finger curves. Peraeopods 3—5, 4% joint decurrent, 24 
and 4! expanded in peraeopods 4 and 5. Uropod 3 with very short peduncle, 
1° joint of the ramus with several spines, 24 rather shorter, with 1 spine 
(unless supposed 1° joint be in reality the peduncle, and supposed 24 joint 
an indistinctly 2-jointed ramus). Telson oval, with 2 (Della Valle; 3, Walker) 
‚Spines on each side; apex acute. Colour pale greyish with some yellow 
spots, ova bluish-green. L. 15—2 mm. 
B Gulf of Naples (depth 50-80 m, on Hydroids, especially Antennularia and 
E Aglaophenia myriophyllum (L.)); Irish Sea (W.-S.-W. of Calf of Man, depth 42 m). 
5. S. cattai Stebb.*) 1876 Probolium polyprion (err., non A. Costa 1853!), 
 Catta in: Ann. Sei. nat., ser.6 ».3 nr.1 p.15 t.2 f.1 | 1893 Stenothoe valida (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 566 | 1897 8. crassicornis (part.), A. OÖ. Walker 
in: J. Linn. Soc., 0.26 p. 229. 
Eyes small, round, black. Antenna 1 in CS rather shorter than antenna 2. 
- Antenna 1, flagellum 20-—25-jointed; antenna 2, ultimate and penultimate 
Joints of peduncle subequal, flagellum 15—24-jointed, thicker than flagellum of 
_ antenna 1. Gnathopod 1, 4" and dt" joints side by side, much shorter 
than the 6% joint, which is trapezoidal, twice as long as broad, back and 
front margins parallel, palm oblique, finely erenulate, well defined. Gnathopod 2 
nearly as in S. valida and S. dollfusi (p. 194, 196), 6% joint with hind margin 
- pubescent and ending in 2 apical teeth, finger eleft at the apex. Peraeopod 3, 
24 joint expressiy stated to be not expanded. Uropod 2 shorter than the others. 
-  —  ÜUropod 3; peduncle a little longer than the ramus,-of which the 24 joint 
is geniculate. Telson twice as long as broad, produced to a little apical 
- point, 3 spines on each side, scattered hairs on the surface. L. Q 3 mm. 
Mediterranean. 


B- 6. 8. clypeata Stimps. 1853 $. c., Stimpson in: Smithson. Contr., .6 nr.5 p.5l! 
1893 8. c., A. Della Valle in: F. Fl. Neapel, v.20 p. 569 | ?1862 S. clypeatus, Bate, Cat. 
Be . Amphip. Brit. Mus., p.61 t.9 £.7. 

| Eyes conspicuous, red. Gnathopod 1 slender, 6% joint small. Gnathopod 9, 
: Be joint very large, palm excavate between 2 teeth, of which the proximal 


*) Spec. nov. After J.D. Catta. 
” 18* 


196 Stenothoe 


is the larger. Peraeopod 3, 24 joint not expanded. Colour bright yellow; 
in the young pale bluish. L. 12:5 mm. 


Fundy Bay (Grand Manan). Depth 55 m. 


7. S. monoculoides (Mont.) 1815 Cancer (Gammarus) m., Montagu in: Tr. 
Linn. Soe. London, v.11 p.5 t.2 f.3 | 1828 G@. m., G. Johnston in: Zool. J., v.3 p.179 | 
1856 Montagua m., Bate in: Rep. Brit. Ass., Meet. 25 p.57 | 1869 Probolium m., A. M. 
Norman in: Rep. Brit. Ass., Meet. 38 p.273 | 1871 Stenothoe m., A. Boeck in: Forh. 
Selsk. Christian., 1870 p.140 | 1892 $. m., G. O. Sars, Crust. Norway, v.1 p.240 t.82 
f.1 | 1893 S. m. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.568 t.58 £.79 | 1881 
Probolium tergestinum, Nebeski in: Arb. Inst. Wien, «.3 p.143 t.13 f. 39. 


Back broad. Head scarcely produced in front, lateral corners obtusely 
angular. Side-plate 4 larger than 24 and 3% combined. Pleon segment 3, postero- 
lateral angles somewhat produced. Eyes small, round, dark red. Antennae l and 2 
subequal, rather short and stout. Antenna 1, flagellum of 12 very distinet 
joints, longer than pedunele. Antenna 2, ultimate joint of peduncle longer than 
penultimate, flagellum 10-jointed, longer than peduncle. Maxillipeds, joint 
supporting the palp large and laminar, palp rather short and stout. Gnathopods 1 
and 2 similar in the 2 sexes, also similar to one another in structure, not in 
size, 4 and 5th joints short, 5t% distally wide, 6" oblong quadrangular, palm 
well defined, nearly transverse in gnathopod 1, more oblique in the larger 
gnathopod 2. Peraeopods 1—5 slender throughout, except for expanded 
24 joint in 4 and 5%, Uropod 3, pedunele very short and broad, with 
3 strong spines, each joint of ramus about equal to it in length. Telson 
oblong oval, without spines, apex evenly rounded. Colour whitish with 
orange-red blotches about middle; ova in pouch dark bluish. L. O0 3 mm. 


North-Atlantie. North-Sea, Skagerrak and Kattegat (Norway, Denmark, France, 
Great Britain); Black Sea. Littoral, among Algae. 


8.8. dollfusi Chevreux 1887 S.d., Chevreux in: Bull. Soc. zool. France, ». 12 
p. 3827, 297 f. | 1891 S. d., Chevreux in: Bull. Soe. zool. France, ©.16 p.260 f.6--10 | 
1893 8. d., A. "Della Valle in: F. Fl. Neapel, v.20 p. 570. 


Head, lateral angles rounded, little produced. Body ie Side- 
plate 4 as wide as 24 and 34 combined, hind margin truncate. Eyes round. 
Antenna 1 long, 1° joint rather longer than 24, flagellum with 15 long slender 
joints. Antenna 2 rather shorter, ultimate joint of peduncle much shorter than 
penultimate, flagellum 10-jointed, nearly as long as pedunele. Gnathopod 1, 
4th and 5th joints rather long, side by side, 6! oval, subequal to 4b or a little 
longer. Gnathopod 2, 4 and 5tk joints subequal, not elongate, 6" in G very long 
and narrow, hind margin densely hirsute, ending in 3 coarse teeth or tubercles; 
the finger almost as long as the 6 joint, with cilia on the concave margin, 
the apex cleft; in Q the 6tk joint is broader and less long, the hind margin 
not very hirsute, with 2 tubercles following an excavation; the finger shorter 
than in C, smooth and apically pointed. Peraeopods 1—5 long and very 
slender, 29 joint of peraeopods 4 and 5 less expanded than usual and with 
the hind margin almost ‚straight. Uropod 3, peduncle much shorter than 
the spinose ramus. Telson long, with 3 spines on each side. L. 3 mm. 


Mediterranean (Cannes); North-Atlantie (Azores). Depth 130 m. 


9. S.tenella O.Sars 1882 S.t., G.O.Sars in: Forh. Selsk. Christian., nr. 18 


p-88 t.3 f.12 | 1892 S.t., G. O. Sars, Crust. Norway, v.1 p.238 t.81 f.2 | 1895 8.t., 
A. Della Valle in: F. Fl. Neapel, v.20 p. 570. 


Stenothoe 197 


Body slender. Head, lateral corners angular. Side-plate 3 distally widened, 
4th scarcely as wide as 24 and 34 combined. Pleon segment 3, postero-lateral 
corners triangularly produced. Eyes large, round, imperfectly developed, light 
red. Antennae 1 and 2 long, slender, subequal, more than half length of body. 
Antenna 1, 24 joint longer than 1°, flagellum about twice as long as pedunele, 
21-jointed. Antenna 2, ultimate and penultimate joints of peduncle subequal, 
flagellum about 11-jointed. Gnathopod 1 small, 4" joint produced about to apex 
of 5th, 6th scarcely broader than 5". Gmnathopod 2 in J, 6!" joint narrow 


 oblong, palm undefined, concave, pubescent, distally dentate and incised almost 


at riecht angles to the length, finger long, powerful, concave margin hairy; 


er in o 6% joint somewhat tapering, palm irregularly serrated, finger and hand 


less powerful than in C. Peraeopods 1—5 long and slender, none of the 
joints expanded, except 24 in peraeopod 4 narrow oval and in peraeopod 5 
broad aval. Uropod 3, peduncle much longer than ramus; armed with 8 spines, 
joints of ramus equal. Telson oblong oval, nearly twice as long as broad, 
obtusely pointed, 3 spines on each side. Colour whitish, banded irregularly 


with patches of light red; ova violet. L.Q 5'5 mm. 


North-Atlantic and North-Sea (West-Norway). Depth 150—282 m. 


10. S. megacheir (Boeck) 1871 Metopa m., A. Boeck in: Forh. Selsk. Christian., 
1870 p. 143 | 1876 M. m., A. Boeck, Skand. Arkt. Amphip., v.2 p.462 t.18 f.1 | 1892 
Stenothoe m., G. O. Sars, Crust. Norway, v.1 p. 242 t. 83. 


Body slender. Head, lateral ecorners bluntly angular. Side-plate 3 distally 
widened, 4" scarcely as wide as 2 and 34 combined. Pleon segment 3, postero- 
lateral corners triangularly produced. Eyes large, round, indistinctly developed, 
licht vellowish red. Antennae 1 and 2 extremely long and slender. Antenna 1 


‚as long as body, 24 joint of peduncle longer than 1°t, flagellum filiform, twice 
‚as long as pedunele. Antenna 2 in O a little shorter, in S a little longer 


than antenna 1, ultimate and penultimate joints of peduncle subequal, very 
long. flagellum much shorter than either. Maxillipeds very slender and elongated. 
Gnathopod 1 small and feeble, 4! joint not quite produced to apex of 5th, 
6" not longer and scarcely broader than 5t, Gmathopod 2, large and 
powerful, especially in J, 6% joint oblong oval, palm long, defined, having 
in d 3 deep ineisions with denticulation above and below them, in © slightly 
concave, irregularly serrate; finger curved, strong, inner margin in © eiliated. 
Peraeopods 1—5 long and slender, none of the joints expanded, except 24 in 
peraeopods 4 and 5 not very broadly oval. Uropod 3, peduncle with 10 spines, 
nearly twice as long as ramus, of which the 2 joints are subequal, very 
slender. Telson oblong oval, apically narrowed, 3 spines on each side. Colour 
whitish, pellueid, with scattered orange patches; ova violet. L.8 mm. 


North-Atlantie and North-Sea (West-Norway). Depth 150282 m. 


11. S. mierops O. Sars 1892 $. m., G. O. Sars, Crust. Norway, v.1 p.237 t.81 
f.1 | 1893 S. monoculoides (part.), A. Della Valle in: F. Fl, Neapel, e.20 p. 907. 


Not very sharply distinguished from S. marina (p. 198). Body rather 


‚robust. Head, lateral corners broadly rounded. Side-plates and pleon segment 3 


nearly as in S. marina. Eyes very small, round, imperfectly developed, light 
red. Antennae 1 and 2 comparatively shorter than in S. marina, nearly equal. 


- Gnathopod 2 in Q, 6tk joint elongate, palm coarsely dentated, reaching nearly 


to base. Uropod 3, peduncle with 8 spines, longer than ramus, of which 
2° joint is shorter than 1%. Telson rather broadly oval, 4 spines on each 


TE SE ONE a EEE RER 
a A Ve re 


198 Stenothoe 


side. Colour highly pellucid, whitish, with reddish patches; ova small, bluish 
grey. L. 0 85 mm. 
North-Atlantie (Norway); North-Sea, outside the great fishing banks. Depth 188m. 


12. S. marina (Bate) 1856 Montagua marinus (nom. nud.), Bate in: Rep. Brit, 
Ass., Meet.25 p.57 | 1857 M. m., Bate in: Ann. nat. Hist., ser.2 v.19 p.137 | 1866 
Probolium marinum, Cam. Heller in: Denk. Ak. Wien, 0.2611 p.14 | 1871 Stenothoe - 


marina, A. Boeck in: Forh. Selsk. Christian., 1870 p.139 | 1892 S. m., @.O. Sars, Crust, 
Norway, e«.1 p.236 t.80 | 1861 8. danai, A. Boeck in: Forh. Skand. Naturf., Mede 8 
p. 655 | 1893 S. monoculoides (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 568. 


Body moderately slender. Head, lateral corners rounded. Side-plate 2 
rather small, with little tooth at lower hind corner, 34 distally expanded, 
4th nearly as wide as 2% and 39 combined. Pleon segment 3, postero-laterar 
corners not strongly produced. Eyes small, round, well developed, dark red. 
Antenna lin 2 nearly.half as long as body, 24 joint of peduncle shorter than 
1°, flagellum longer than peduncle, 14—18-jointed. Antenna 2 rather shorter 
than antenna 1, ultimate and penultimate joints of peduncle subequal, flagellum 


10—12-jointed. Antennae l and 2 in J rather longer than in 9. Gmathopod 1, 


4! joimt produced nearly to apex of 5%, which is distally widened, 6! rather 
longer than 5%, distally widened, palm obliquely convex. Gnathopod 2 powerful, 
ie joint broad at base and tapering in Q, longer and narrower at base in JG, 
palm well defined, almost all the length of the hand, denticulate throughout and 
in C coarsely so at the apex, finger very long, in JS eiliate on inner margin. 
Peraeopods 3—5, 4" joint rather expanded and produced, 24 joint long 
oval in peraeopod 4, broadly oval in peraeopod 5. TUropod 3, peduncle 
. with 6 spines, subequal to ramus, of which 24 joint is little shorter than 1. 
Telson oblong oval, obtusely pointed, 2 spines on each side. Colour pellucid 
whitish, mottled with yellow and with pinkish patches. L. © 5, d 6 mm. 


North-Atlantie and North-Sea (Norway, France, (Great Britain); Adriatie. Depth 
37—94 m. 


13. S. bosphorana Sowinski 1898 S.Db., Sowinski in: Mem. Soc. Kiew, v. 15 
p.498 t.11 .2325 (249); t.12 £.9—19. 


Closely resembling Proboloides grandimanus (p. 187), except in regard to 
mandible. Head, rostrum feeble. Eyesrather large, round. Antenna 1 in J shorter 
than antenna 2, first 2 joints equal, 39 about '/, as long as 24, all 3 almost bare, 
flagellum with 11 or 12 joints, 1° the longest;'accessory fagellum rudimentary, 
1-jointed. Antenna 2 in C, ultimate joint of peduncle considerably longer than 
penultimate, flagellum rather shorter than ultimate joint of peduncle, with 
8 joints, 1° the longest. Antennae 1 and 2 in © differing from those of JS, 
antenna 1, flagellum with 15 joints, 1° not longer than the following; 
antenna 2, ultimate and penultimate joints of pedunele much shorter than in C, 
flagellum thrice as long as ultimate joint of peduncle, 11- or 12-jointed. Mouth- 
parts as usual in the genus. Gnathopod 1 in JS, 4" joint not nearly reaching 
apex of 5th, 5th rather longer than the narrowly oblong oval 6%, palm 
oblique, ill-defined, finger not large. (Gnathopod 1 in ©, 5% joint much shorter 
than 6, Gnathopod 3 in S, 4 and 5th joints very "short, 4th apically acute, 
5'h eup-shaped, 6% rather longer and much stouter than 24, oblong oval, 
but with transverse apex serrate in 4 dentieles and projeeting outward 
in a small tooth, over which the great finger bends, reaching nearly to end 
of hind (or palmar) margin, this being bordered with setules interspersed 
with 4 or 5 minute spines; inner margin of finger setulose, apex not eleft. 


= 
“4 
. 
= 
3 
E 
t 
; 
E 
d: 


. Stenothoe 


Gnathopod 2 in O, 6% joint almond-shaped with almost rectilinear front margin 
and eonvex hind margin. Peraeopod 1 longer than peraeopod 2; peraeopod 3 
_ similar to peraeopods l and 2; peraeopods 4 and 5, 24 joint oval, wider and - 
more produced in peraeopod 5 than in 4, 4! joint produced downward. 
‚behind. Uropod 1, rami equal, each figured with 2 (outer with 3 in text), 
‚pedunele with 6 spines. Uropod 2 little more than half as long as uropod 1. 
. Tropod 3, pedunele with 3 spines, basal joint of ramus with 3; fig. 24 represents 
‚a biramous pair, neither branch 2-jointed. Telson ‘oval, with 2 spines above, 

2 setules below on each lateral margin. L. about 3°5 mm. 

Bosphorus. Depth 32 m. 


14. S. brevicornis O.Sars 1882 S.b., G. O.Sars in: Forh. Selsk. Christian., 
nr.18 p.89 t.4 f.1 | 1892 S.b., G. O. Sars, Orust. Norway, v.1 p.241 t.82 f.2| 1893 
8. b., A. Della Valle in: F. Fl. Neapel; v.20 p.569. 


Body rather robust. Head, lateral eorners obtusely angular. Side- siste: 3 
 distally widened, 4'h about as wide as 24 and 34 combined. Pleon segment 3, 
z postero-lateral corners almost quadrate. Eyes round, well developed, dark red. 
 Antennae 1 and 2 very short. Antenna 1 about ?/, length of the body, 24 joint 
shorter than 1°, flagellum scarcely longer than peduncle, 12-jointed. Antenna 2 
‚subequal to antenna 1, ultimate and penultimate joints of peduncle subequal, 
 flagellum as long as either. Gmathopod 1, 4" joint not reaching apex of 
5’, 6% as long as 5%, much wider, widening distally, palm well defined, 
straight, moderately oblique. Gnathopod 2 in Oo, 6% joint much larger than 
in gnathopod 1, but similar in shape, palm defined by a projecting angle, 
‚sinuous, dentieulate near the finger hinge, finger not very strong. Peraeo- 
.pods 1—5 rather short and stout, 4th joint i 
and produced, 24 joint in peraeopod 5 more broadly oval than in peraeopod 4. 
_  Tropod 3, peduncle rather broad, longer than ramus, with 5 minute spines; 
24 joint of ramus smaller than 1%. Telson oblong oval, obtusely pointed, 
devoid of spines. Colour whitish, ova bluish green. L. © 8 mm. 


Arctic Ocean, North-Atlantie and North-Sea (Norway). Depth 94 m. 


= 15. 8. adhaerens Stebb. 1888 S. «., T. Stebbing in: Rep. Voy. Challenger, 
2.29 p.748 t.39 f 1893 S.a., A. Della Valle in: F. Fl. Neapel, v.20 p. 569. 


Head, lateral corners rounded. Side-plate 4 searcely as wide as 2!and 3 
combined. Pleon segment 3, postero-lateral angles little produced, obtuse. Eyes 
‚rounded oval, well developed. Antennae 1 and 2 subequal, not elongate. 
 Antenna 1, flagellum 17-jointed. Antenna 2, ultimate joint of pedunele shorter 
than penultimate, flagellum 15-jointed, nearly as long as peduncle. Maxillipeds 
 (Fig.51 p.193), inner plates minute, outer wanting. Gmathopod 1, 4% joint 
produced quite to apex of 5th, 6! Jonger than 5", palm well defined, somewhat 
oblique, finely pectinate. Gnathopod 2 in O, 6% joint not twice as long as broad, 
palm undefined, irregularlv but finely denticulate on the part near to the hinge 
of the long broad finger. Peraeopods 3—5, 4" joinf"expanded and produced 
strongly, 24 joint more broadiy oval in peraeopod 5 than in peraeopod 4. 
Uropod 3, peduncle subequal to ramus, with several spines, 24 joint of 
ramus shorter than 1%. Telson long oval, apex subacute, 4 pairs of lateral 

spines. L. about 6 mm. 


Southern Indian Ocean (Cape Agulhas). On serew of H.M. S. Challenger. 


x S. guerinii (Bate) 1862 Montagua 9., Bate, Cat. Amphip. Brit. Mus., p.59 t.9 
£.5 | 1893 Stenothoe valida? (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. "569. 


Indian Ocean (Madagascar). 


RE Nr ER TEN RS BO ENER er ie en 


200 Stenothoe, Phliantidae, Phlias 


S. longimana (Bate) 1862 Montagua l., Bate, Cat. Amphip. Brit. Mus., p. 57 
£.9 f.1 | 1885 Probolium longimanum, J. V. Carus, Prodr. F. Medit., v.1 p.407 | 1898 
Stenothoe?, A. Della Valle in: F. Fl. Neapel, ©.20 p. 569. 


„Piedmont“. 


S. miersii (Hasw.) 1880 Montagua m. + M. longicornis (3?), Haswell in: 
P. Linn. Soc. N.S.Wales, v.4 p.823 t.24 f.4; p.323 t.24 f.5 | 1883 Montaguana m., 
Chilton in: Tr. N. Zealand Inst., «. 15 p.79 | 1885 Probolium m., Chilton in: P. Linn. 
Soe. N.S.Wales, v. 9 p. 1043 | 1893 Stenothoe monoculoides? + Montagua miersüi, 
A. Della Valle in: F. Fl. Neapel, v.20 p. 569. 

L. about 4 mm. 


South-Paeifie (Port Jackson [East-Australia]; Timaru and Lyttelton Harbour 
[New Zealand)). 


2. Fam. Phliantidae 

1899 Phliadidae, 'T. Stebbing in: Tr. Linn. Soc. London, ser. 2 v.7 p. 414. 

Peraeon strongly developed. Pleon segments 5 and 6 subjectto degradation 
(Fig. 52). Antennae 1 and 2 short. Antenna 1 without accessory flagellum, 
flagellum with sensory filaments. Upper lip with distal margin usually undivided. 
Lower lip without inner lobes. Mandible without palp. Maxilla 1 with 
palp obsolete. Maxillipeds variable. Gmathopods 1 and 2 simple or only feebly 
subchelate. Peduncle laterally produced in one or more of the pleopods (Fig. Ra): 
Uropod 3 usually not biramous. Telson short, entire. 

Marine. 


6 genera, 6 species. 


Synopsis of genera: 


1 j Maxillipeds, palp 3-jointed — 2. 
\ Maxillipeds, palp 4-jointed — 4. 

0 f Uropod 3 biramous. ........2... 2 4, Gen.’ Phlias . . . 2.200 
\ Uropod 3 not biramous — 8. 

3 j Uropod 3, pedunele and ramus distinet. . . .. 2. Gen. Pereionotus . p.201 
\ Uropod 3, ramus not distinet from pedunele. . 3. Gen. Palinnotus. . p.202 


f Pleopod 3 (Fig. 53), inner ramus rudimentary . 4. Gen. Iphiplateia. . p.203 
\ Pleopod 3, inner ramus well developed — 5. 

| Side-plates 1—4 very deep . . : 22 2... 5. Gen. Iphinotus . . p. 204 
’ | Side-plates 1—4 very shallow . .. 2.2.2. 6. Gen. Bireenna. . . p.205 


1. Gen. Phlias Guer. 


1836 Phlias, Guerin (-Möneville) in: Mag. Zool., C1.7 t.19 | 1840 P., H. Milne 
Edwards, Hist. nat. Crust., v.3 p.23 | 1853 P., J. D. Dana in: U. S. expl. Exp., v. 1311 
p. 908 | 1862 P., Bate, Cat. Amphip. Brit. Mus., p.83 | 1888 P., T. Stebbing in: Rep. 
Voy. Challenger, v.29 p.165 | 1899 P., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 
v.7 p. 414. 


Body short, laterally u Peraeon segments 1—7 tubereulately 
carinate. Pleon segments 5 and 6 coalesced, or 5t" missing. Head small, 
partially immersed in peraeon segment 1. Side-plates 1—4 large. Eyes 
prominent. Antennae 1 and 2 short, antenna 1 the longer and much the stouter, 
both elosely similar to those of Pereionotus, as likewise the limbs, so far as 


is known. Maxillipeds, palp 3-jointed. Pleopod 3 (uropod 1 according to 


ER ne De 5 F 


Phlias, Pereionotus 201 


Guerin) with pedunele short, and 2 much longer, equal, eiliated rami. Uropod 1 
with blunt equal rami, as long as peduncle. Uropod 2 wanting as in 
Pereionotus (9). Uropod 3 very short, with 2 conical rami as long as 
peduncle. Telson small, transverse, a little rounded (text) or a little emarginate. 


1 species. 


1. P. serratus Guer. 1836 P.s., Guerin (-Meneville) in: Mag. Zool., C1.7 t.19 
f.1—4 | 1862 P.s., Bate, Cat. Amphip. Brit. Mus., p.88 t.14a f.2 (on t.21) | 1888 P. s., 
T. Stebbing in: Bon. Voy. Challenger, v.29 p.165 ete. | 1893 P.s., A. Della Valle in: 
F. Fl. Neapel, v.20 p.561 | 1899 P.s., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 
e.7 p. 417. 


Colour opaque a brown. L. 5—6 mm. 


: South-Paeifie (between the Malouines (Falkland) Isles and Port ‚Jackson |East- 
Australia]); Mediterranean. 


= 2. Gen. Pereionotus Bate & Westw. 


ER 1862 Pereionotus (Sp. un.: P. testudo), Bate & Westwood, Brit. sess. Crust., ®. 1 
——— ».226 | 1888 P., T. Stebbing in: Rep. Voy. Challenger, v.29 p.340 | 1893 P., A. Della 
; Valle in: F. Fl. Neapel, v.20 p.559 | 1899 P. (part.), T. Stebbing in: Tr. Linn. Soc. 
London, ser.2 v.7 p.416 | 1864 Ieridium (Sp. un.: I. fuscum), E. Grube in: Jahresber. 
- — —— Sechles. Ges., v.41 p. 58. 
5 Body depressed, ridged, hind part of pleon ventrally foxed. Head, 
_  _ rostrum short, obtuse, lateral corners carrying prominent eyes. Antennae 1 and 2 
small, antenna 1 the larger, flagellum in both small. Upper lip bilobed. 
Lower lip without inner lobes. Mandible, eutting edge dentate, spine-row of 
| very few spines and a seta, molar and palp wanting. Maxilla 1, inner 
plate wanting, outer plate with 5 spines, palp wanting, its place indicated 
by a bulge of the margin. Maxilla 2, inner and outer plate coalesced except at 
apex. Maxillipeds, inner plates with 3 spine-teeth on truncate apex, outer 
plates almost unarmed, reaching end of 24 joint of palp or further, palp small, 
of 3 joints, 1° largest. Gnathopods 1 and 2 simple. Peraeopods 1—5 as in 
gnathopods 1 and 2 with hooked finger. Peraeopods 3 and 4, 2 joint roundly 
expanded, 4 joint also wide. Peraeopod 5, 24 and 4" joints smaller than 
in peraeopods 3 and 4. Pleopods 2 and 3 sending out an arm from peduncle 
(as in Iphiplateia, p. 203, but much shorter), tipped with 3 coupling spines. 
Uropod 1 reaching much beyond the others, pedunele as long as or longer 
than rami, outer ramus rather the shorter, slightly curved, both rami obtuse, 
- _ tipped with-short, blunt spine. In © (?) uropod 2 not developed, uropod 3, 


 pedunele subequal to single spine-tipped ramus. In C (?) uropod 2 much 
-  _ shorter than uropod 1, but otherwise similar, especially as to the obtuse rami, 
E the pair of peduncles "distally convergent, uropod 3 very short, with tubercle 
0m inner margin of peduncle, single ramus not longer than broad, much 
E: shorter than peduncle. Telson small, triangular, depressed. 

a 1 species. 


E 1. P. testudo (Mont.) 1808 Oniscus t., Montagu in: Tr. Linn. Soc. London, 7.9 
E p- 102 | 1862 Pereionotus t., Bate & Westwood, Brit. sess. Crust., v.1 p.228 f. | 1893 
P.t., A. Della Valle in: F. Fl. Neapel, v.20 p.559 t.3 f.7; t.31 f.1—19 | 1862 Phlias 
rissoanus, Bate, Cat. Amphip. Brit. Mus., p.88 t.14a f.3 (on t.21) | 1875 Ieridium 
E rissoanum, Catta in: Rev. Sei. nat., v.4 p.161 | 1864 T. fuscum, E. Grube in: Jahresber. 
> Sehles, Ges., v.41 p. 58 | 1864 I. f., E. Grube in: Arch. Naturg., v.301 p.209 t.5 
Be: 8.3, Ba—f. 


202 . 3 Pereionotus, Palinnotus 


Peraeon segments 1—-7, pleon segments 1 and 2 tubereulately carinate 
and setulose, lateral tubereles on peraeon segments 2—7. Pleon segment 5 
apparently missing in ©, short in S. Head flat, widening distally, a small 
point projecting below r eye. Side-plates 1—4 wide, outspread, fringed, 
4b a little emarginate. Eyes subglobose, red (Montagu: black). Antenna 1, 
15% joint very broad, with short obtuse apieal process, 24 shorter and 
narrower with small process, 34 seareely shorter, this and the little 1-jointed 
flagellum carrying long setae. Antenna 2 inserted some way behind antenna l, 
much shorter, only 3 free joints of peduncle, ultimate and penultimate joints 
subequal, flagellum 2- or 3-jointed, shorter than antepenultimate joint of 
pedunele, tipped with long setae. Gnathopods 1 and 2, 34 joint longer than 


broad, 4" triangular, underriding short 5", 6!" simple as in peraeopods, tipped. 
with spine. Peraeopods 1 and 2, 24 joint rather stout, not long, 4 and. 


le short, and broad in comparison with the length, 6 joint and finger 
similar in all the limbs. Colour dull red, with a white spot on the anterior 
part of the back, but as the insect dies this mark is lost (Montagu); uniform. 


yellow brown on segments of peraeon and pleon, with large white spots on 


24 peraeon segment” (Della Valle). L. 3—4 mm. 
English Channel (South of Great Britain), Mediterranean. 


‚3. Gen. Palinnotus Stebb. 


1900 Palinnotus (Sp. typ.: P. thomsoni), T. Stebbing in: Ann. nat. Hist., ser. 7 
v.5 p. 16. 43 


0. In general agreement with Pereionotus, but distinguished as 
follows. Upper lip not bilobed. Maxilla ‘1 with a small spinule representing 
the palp. Maxillipeds, outer plates reaching slightly beyond the 3-jointed 


palp, and minutely fringed on distal half of inner margin. Pleopod 3, but 


not pleopod 2, with inner side of pedunele produced. Uropod 2 developed, 
short, uniramous. Uropod 3 without distinetion of peduncle and ramus. — 
d unknown. 


1 species. 


1. P.thomsoni (Stebb.) 1899 Pereionotus t., T. Stebbing in: Tr. Linn. Soe. 
London, ser.2 v.7 p.417 t,354 | 1900 Palinnotus t., T. Stebbing in: Ann. nat. Hist., 
ser. 7 v.5 p. 16. 


Body broad oval. Peraeon segments 1—7 and A segments 1 and 2 
carinate, the medio-dorsal processes not quite as long as their segments, 
that on peraeon segment 1 preceded by am acute point directed forward. 
Head, rostrum small, but distinct, lateral angles a little in advance. Side- 
plates 1—4 without conspicuous setules on distal margin. Eyes rounded 
oval, dark, on lateral lobes of head. Antenna 1, 1° joint broad, 24 eylindrieal, 
34 conical, flagellum small, 2-jointed. Antenna 2 shorter, much more 
slender, attached to the rear of antenna 1 on under surface of head, ultimate 
joint of pedunele rather longer than penultimate, flagellum with long setae, 
1- or 2-jointed. Gnathopods 1 and 2 and peraeopods 1 and 2 as in Iphiplateia 
whiteleggei (p. 203). All the limbs have a rather strong spine at äpex and at 
middle of inner margin of 6 joint. Peraeopod 3, 24 joint broader than 
‚ong, 4 not longer than 34, very broadly lobed. Peraeopods 4 and 5 with 
24 and 4% joints successively much smaller than in peraeopod 3, 24 in 
peraeopod 5 with hind lobe not reaching instead of overlapping the 34 joint. 
Pleopod 2, peduncle broader than long, inner margin convex, but not 


a a Tr ze 


re . 


Er ya £ RR r 
ee TE De a 
a ge TEL ee N Fr ee Te 


h 


“ 
R- 


Palinnotus, Iphiplateia 203 


produced. Pleopod 3 with the coupling spines on a short, but very distinetly 
produced process. Uropod 1, peduncle rather longer than the longer of the 
two rami, both rami narrow. Uropod 2, pedunele not reaching end of 
telson, the single ramus narrowly oval. Telson triangular, with rounded apex. 
 L. rather under 5 mm. 


Watson’s Bay [East-Australia]. Low-tide line. 


4. Gen. Iphiplateia Stebb. x 


1899 Iphiplateia (Sp. un.: I. whiteleggei), T. Stebbing in: Tr. Linn. Soc. London, 
-ser.2 v.7 p. 414. 


Body much depressed, pleon strongly flexed. Heäd immersed between 
projeeting 1° pair of side-plates, square, feebly rostrate, front corners prominent, 
carrying the eyes. Side-plates I—4 large, outspread. Antennae 1 and 2 
short, subequal in length, antenna 1 the broader, antenna 2 attached to the 
rear of antenna 1, on under side of head. Upper lip with convex distal 
margin. Maxilla 1, inner plate wanting, outer with 5 spines, palp wanting, 
but position for it indicated. Maxilla 2, inner plate short and broad, with 
apical spine-teeth, outer narrow, continuous with the base. Maxillipeds 
‚rather broad, outer plates feebly armed, reaching apex of 24 joint of palp, 
finger of palp small, cylindrical, tipped with a long seta. Gnathopods 1 and 2 
simple. Peraeopods 3—5, 24 joint very large, 4! broad. Pleopods 2 and 3, 
peduncle with produced process of inner margin. Pleopod 3, inner ramus 
rudimentary. Uropods 1 and 2 biramous, 29 the shorter. Uropod 3 very small, 
l-jointed. Telson entire. 


1 species. 


1. I. whiteleggei Stebb. 1899 I. w., T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 0.7 p.415 t. 34. 


Body (Fig. 52) forming a broad oval, by help of the 1° joint of antenna 1 
and of 24 joint of peraeopods 3—5; dorsal line feebly angular or ‚smooth, 
peraeon segment 7 slightly upraised, pleon segment 1 projecting backward 
in a prominent tuberele, pleon small, segment 6 dorsally undeveloped. 
-  Bide-plate 1 subtriangular, 24 and 34 oblong, 4" very 
broad, excavate behind, 5t" to 7th small, bilobed, front 
lobe the larger. Eyes small, oval, dark. Antenna 1, 
15t joint nearly as broad as long, 
with large inner lobe, 24 similar, 
but smaller, 32 narrow, flagellum & 
very small, 2-jointed. Antenna 2, 
basal joints apparently soldered to 
underside of head, ultimate joint of 
pedunele rather smaller than penulti- 
mate, sliehtly longer than the small 
ER 2-jointed flagellum. Epistome roun- PR 
EN Doreal view, sek. ded above. Mandible, eutting edge cn nooked spines. 
Ä quadri-dentate, spine-row of 3 minute 
spinules; a broad pellueid spine tipped with a setule perhaps represents 
the molar. Gmnathopod 1, 29 joint not nearly reaching distal border of 


side-plate, 34 as long as 4th, 5fh a little longer than the tapering 6'", which 


forms no palm, finger small, eurved. Gnathopod 2 like gnathopod 1, but 


TEEN SER 


204 Iphiplateia, Iphinotus 


5th and 6*h joints more nearly equal. Peraeopods 1 and 2, 4th joint a little 
wider, not longer than 34, 5th as broad as long, much shorter than 6th, 
6 and 7th nearly agreeing in all the limbs of peraeon. Peraeopod 3, 24 joint 
with the broad expansion produced below the 34 joint, 4! as broad as long, 
lobed behind. Peraeopod 4, 24 and 4tk joints larger than in peraeopod 3. 
Peraeopod 5 with 24 joint shorter than in peraeopods 3 and 4, but even wider, 
otherwise nearly as peraeopod 3. Pleopod 1, peduncle without process, but 
carrying 5 or 6 coupling spines. Pleopod 2, peduncle much shorter than 
in pleopod 1, with short, broad process carrying 5 or 6 coupling spines. 
Pleopod 3 (Fig. 53), pedunele very short, with long narrow process carrying 
3 coupling spines, inner ramus minute, oval, unjointed, without setae, outer 
ramus normal.  Uropod 1, peduncle shorter than the curved outer ramus, 
longer than the straight inner one. Uropod 2 much smaller, otherwise like 
the 1°. Uropod 3, each consisting of a small oval lamella, nearly eoncealed 
by the telson. Telson semi-oval, with subacute apex. L. about 5 mm. 


Watson’s Bay [East-Australia]. 


5. Gen. Iphinotus Stebb. 


1882 Iphigenia (Sp. un.: I. typica) (non ©. F. Schumacher 1817, Mollusca!), G.M. 
Thomson in: Tr. N. Zealand Inst., v.14 p.237 | 1899 Iphinotus (Sp. un.: I. chiltoni), 
T. Stebbing in: Tr. Linn. Soe. London, ser.2 v©.7 p.419. - 


Body much depressed, pleon strongly flexed. Head immersed between the 
projeeting 1° pair of side-plates, square, feebly rostrate, front corners prominent, 
carrying the eyes. Side-plates 1—4 large, outspread. Antennae 1 and 2 nearly 
as in Ipbiplateia (p. 203), as also the mouth-parts, except that the maxillipeds 
have the 4 joint well developed, unguiform. Limbs of the peraeon nearly as 
in Iphiplateia, except that the 24 and 4 joints are very much smaller in 
peraeopod 5 than in peraeopods 3 and 4. Pleopods 1—3 with both rami well 
developed. Pleopods 2 and 3, pedunele laterally produced into a long-and strong 
process. Uropods 1 and 2 biramous, peduncle much longer than the rami. 
Uropod 1 slender, uropod 2 stout. Uropod 3 membranous, not biramous, 
small. Telson entire. 


1 species. 


1. L.typicus (G.M. Thoms.) 1882 Iphigenia iypieca, G.M. Thomson in: Tr. N, 
Zealand Inst., e. 14 p. 237 t. 18 f.4 ! 1899 Iphinotus chiltoni + Iphigenia typica, 
T. Stebbing in: Tr. Linn. Soe. London, ser.2'0.7 p.419 t.358; p. 420. 


Body broad oval, with dorsal carina. Eyes rounded oval, dark. Antennal, 
1°t joint large, distally widened, 29 cylindrical, 3% scarcely longer than broad, 
flagellum with 3 small joints. Antenna 2, moderately stout, ultimate joint of 
peduncle longer than penultimate, flagellum with 5 joints, last 4 very small, setose. 
Upper lip broader than deep, distal margin almost straight. Gnathopods 1 and 2 
and peraeopods 1 and 2 in general as in Palinnotus thomsoni (p. 202), except that 
the finger is abruptly narrowed at base of the sharp hooked nail, and has there 
a strong setule. Peraeopods 3 and 4, 24 joint very large, a little longer in 
peraeopod 3 than in peraeopod 4, 4 joint greatly expanded, hind lobe nearly 
. double the length of the front margin. Peraeopod 5, 24 and 4 joints very 
much smaller than in peraeopods 3 and 4. Pleopod 1, peduncle not very 
long, not expanded. Pleopod 2, peduncle short, produced on inner side to 
a long, powerful process, carrying 4 coupling spines. Pleopod 3 like pleopod 2, 


Iphinotus, Bircenna 205 


but the process a little less massive. Uropod 1, peduncle slender, more than 
twice as long as the slender, subequal, finely ciliated rami. Uropod 2 
shorter but much stouter than uropod 1, peduncle about twice as long as 
the stumpy rami, fringed near outer margin with about 11 short spines. 
Uropod 3 broad above, the pointed apex projecting just beyond the telson, 
the pair together not so broad as the telson. Telson much wider than long, 
obtuse-angled, a few slight setules at the sides. L. about 5 mm. 


Lyttelton Harbour and Otago Harbour [New Zealand]. 


6. Gen. Bircenna Chilton 


1884 Bircenna (Sp. un.: B. fulvus), Chilton in: Tr. N. Zealand Inst., v.16 p.264 | 
1893 B., A. Della Valle in: F. Fl. Neapel, v.20 p.561 | 1899 B., T. Stebbing in: Tr. 
- Linn. Soe. London, ser.2 v.7 p.421. 


Body broad. Pleon segment 5 very short, 6" indistinet. Head broad, 
depressed in front. Side-plates all very shallow. Pleon segments 1—3, 
postero-lateral corners rounded. Antennae 1 and 2 short, antenna 1 rather the 
longer. Mandible without palp. Maxilla 1, inner plate with apical setae, 
outer with 8 apical spines, palp wanting, but margin of maxilla interrupted 
/ at its point of disappearance. Maxillipeds, inner plates distally truncate, with 3 
E spine-teeth, outer slightly armed, both reaching apex of 2% joint of palp, palp 
E short, 1° joint largest, 3 following successively both shorter and narrower, 
4th very small. Gnathopods 1 and 2 almost simple. Peraeopods 1 and 2, 4 joint 
a little widened. Peraeopods 3—5, 24 joint expanded, larger in 4h than 
in 34, and much larger in 5th peraeopod; 4 joint rather expanded and 
deeurrent. Pleopods 1—3 biramous, with peduncle broadly produced on 
inner side. Uropod 1, peduncle shorter than acute, curved, very unequal 
rami; uropod 2 similar, but rather stouter and shorter; uropod 3, a single 
joint bifid, with outer apex rounded, inner (perhaps representing ramus) acute, 
setiferous. Telson short, entire. 


(a 


4 


1 species. 


1. B. fulva Chilton 1884 B. fulvus, B. fulva, Chilton in: Tr. N. Zealand Inst., 
v.16 p.264, 265; t.21 f.1, la—e | 1893 B. fulva, A. Della Valle in: F. Fl. Neapel, v.20 
 p.562 1.58 £.73, 73* | 1899 B. f., T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p.421. 


Peraeon much larger than pleon. Head very prominent, protruding a 
little below the antennae. Eyes minute. Antenna 1. 1% joint as long as 24, 
flagellum as long as peduncle, 6 joints with sensory filaments. Antenna 2 with 
only 3 free joints of pedunele, ultimate as long as the 2 preceding combined, 
flagellum about as long as free part of peduncle, 4-jointed. Gnathopods 1 
and 2, 34 joint longer than broad, as long as 4*h, 5th a Jittle shorter than 6%, 
which is not expanded, but a little produced at apex, yet not enough to make 
a chela with the short apieally toothed finger. Peraeopods 1 and 2 very like 
the gnathopods 1 and 2, except as regards the 4 joint. Peraeopod 5 much 
the largest. Telson nearly an equilateral triangle, with a setule on either 
side of subacute apex. Colour yellow. L. 3 mm. 


Lyttelton Harbour [New Zealand]. 


RE HEBEN EEE FR N 


206 Colomastigidae, Colomastix 


13. Fam. Colomastigidae 


1893 Subord. Subiperini, A. Della Valle in: F. Fl. Neapel, v.20 p.853 | 1899 
Colomastidae, Chevreux in: O.-R. Ass. Franc., Sess. 27 v.2 p.483 | 1899 Colomastigidae, 
T. Stebbing in: Ann. nat. Hist., ser. 7 v.4 p. 211. 


Body cylindrie, subdepressed. Head, rostrum small, acute. Side-plates 
all shallow, none bilobed. Eyes distinet. Antennae 1 and 2, peduncle well 
developed, flagellum minute, antenna 1 (always?) the longer, without actessory 
flagellum. Epistome conical. Upper lip bilobed. Lower lip probably without 
inner lobes. Mandible, eutting edge divided into spine-like teeth, no accessory 
plate, spine-row, or palp; molar small. . Maxilla 1, inner plate wanting, outer 
feebly armed, palp 1-jointed. Maxilla 2, inner plate the broader, only slightly 
separated from outer. Maxillipeds, inner plates completely coalesced, outer 
broad, reaching to middle of Rn: 2° joint, palp 4-jointed, 39 joint longest. 
SeHDERNR 1 and 2 simple in ©, in © gnathopod 2 subchelate. Peraeo- 
pods 1—5 subequal, 24 joint but little expanded. Pleopods, rami few-jointed. 
Uropod 3, rami lanceolate. Telson entire. 


Marine. 


1 genus, 3 species. 


1. Gen. Colomastix Grube 


1861 Colomastix (Sp. un.: ©. pusilla), E. Grube, Ausfl. Triest, p. 157 | 1888 (., 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.329 | 1893 ©., J. Bonnier in: Bull. sei. 
France Belgique, v. 24 p; 202 | 1893 C., A. Della Valle in: F. Fl. Neapel, v.20 p.854 
1862 Cratippus (Sp. un.: CO. tenuipes), Bate, Cat. Amphip. Brit. Mus., p. 275 | 1869 
Exunguwia (Sp. un.: E. stilipes), (A.M. Nonmhn, in:) G.S. Brady &D. Robertson in: 
Ann. nat. Hist., ser.4 v,3 p. 859. 


With the characters of the family. 


3 species. 


Synopsis of species: 


f j..Uropod 8, rami. very uregual .; 2... 8 Kur 1. ©. brazieri . p.206 
\ Uropod 3, rami subequal — 2. 

{ Gnathopod 1, 34 joint rather elongate . .. .... 2. C. pusilla . . p. 207 

Gnathopod 1, 34 joint not elongate . ... 2... 3. C. hamifera . p. 207 


1. ©. brazieri Hasw. 1880 €. b,, Haswell in: P. Linn. Soc. N .S.Wales, v.4 
p- 341 t.22 f.4 | 1893 ©. pusilla (part.), A. Della Valle in: F. Fl. Neapel, «.20 p.851. 


Eyes round, rather prominent. Antennae 1 and 2 subequal, spinose, 
pedunele slightly compressed; antenna 1, 1% joint stouter and rather longer 
than 24, not as long as 24 and 34 combined, flagellum shorter than 34 joint 
of pedunele, 4- (Haswell) or (?)3-jointed. Antenna 2, 34 joint stout, as long 
as ultimate joint of pedunele, penultimate rather longer, flagellum with 1 distinet 
Joint, perhaps followed by I or 2 minute terminal joints. Epistome very acute, 
maxillipeds and probably other mouth-parts as in C. pusilla. Gnathopod 1, 24 joint 
membranous, slightly widened, 3% rather long, 4% a little longer, "5th and 
6% Jinear, 5tk much longer than 6t", the latter tipped with fasciele of spines, one 
of which may be the finger. Gnathopod 2 more robust, 3% and 4" joints not 
elongate, zth eup-like, rather broad, much shorter than 6*k, very spinose. 
6‘ in Oo elongate oval, apically narrowed, hind margin spinose, palm short, 


Colomastix 


ill-defined, overlapped by small slender finger, in JS broadly oval, narrowed 
‚at the oblique obscurely bidentate palm, finger rather stout, not overlapping 
palm. Peraeopods 1—5 moderately robust, 4% joint a little widened. 
ranchial vesieles narrow, marsupial plates very long and broad. Uropods 1 
and 2, peduncle subequal to rami, rami nearly equal, longer in uropod 1 than in 
uropod 2; uropod 3, pedunele shorter than telson, inner ramus long narrowly 
lanceolate, reaching much beyond those of uropods 1 and 2, outer very short, 
spine-like. Telson conical, compressed, almost acute at apex. Colour light 
green. L. about 10 mm. 


Port Jackson [East-Australial. Depth 4--18 m. 


“R 2. C. pusilla Grube 1861 €. p., E. Grube, Ausfl. Triest, p.137 | 1864 ©. Ps 
 E. Grube in: Arch. N Naturg., 0.301 p.206 t.5 f.2,2a—b | 1888 C. p., T. Stebbing in: 
Rep. Voy. Challenger, v.29 p.329 | 1893 C.p., J. Hospser in: Bull. sei. France Belgigüe, 
0.24 p.203 t.8| 1893 C.p. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.854 t.6 
2.2; t.61 f.23-—37 | 1862 Cratippus tenuipes, Bate, Cat. Amphip. Brit. Mus., p. 276 
t.46 f.10 | 1876 ©. £., T. Stebbing in: Ann. nat. Hist., ser.4 v.18 p.447 t.20 £.4.4a- e| 
- 1866 (. erassimanus -+ ©. pusillus, Cam. Heller in: Denk. Ak. Wien, ®. 2611 p. 50; 
t.4 f. 12, 13 | 1869 Exunguia stilipes, (A. M. Norman in:) G. S. Brady & D. Robertson 
"in: Ann. nat. Hist., ser.4 v.3 p.359 t.22 f. 7—12. 


Head, lateral cornersrounded. Pleon segments 1—3, lateral angles rounded. 
Eyes small, round, red, the lenses outlined with white. Antenna 1 longer and 
_ much stouter than antenna 2, 1° joint not as long as 24 and 34 combined, 
 flagellum of 1 short and 2 minute joints. Antenna 2, penultimate joint rather 
longer than the stout antepenultimate or narrower ultimate, all serrulate, flagellum 

as in antenna 1. Epistome subacute. Lower lip apically broad, prominent 
at centre. Maxilla 1, outer plate small on large base, armed with 2 or 
3 spinules, the short 1-jointed palp carrying 4 slender spines. Maxillipeds, 
inner plates forming one piece, simply conical or blunt, outer plates feebly armed, 
_ reaching middle of 24 joint of palp, of which 34 is rather longer than 24, finger 
 _ obtuse, setulose. Gnathopod 1, 29 joint widened distally, 4" rather longer than 34: 
5 and 6th subequal, finger spine-like, distinguished from the group of 
-  spines about it by the attached tendon; gnathopod 1 atrophied in C (Della 

- Valle). Gnathopod 2, 34 and 4th joints short, 5% and 6!" in © subequal in 
length, spinose, 6! rather tapering, palm ill-defined, finger moderately 
strong, in G 5tl short, cup-like, 6!" greatiy enlarged, palm divided into 
3 large blunt processes, finger robust (Heller’s €. erassimanus). Peraeo- 
 pods 1—5 subequal, not very robust, 24 joint little dilated. Branchial 
vesicles narrow. Uropods 1—3, rami broad, lanceolate, slightly serrulate, 
34 shortest, in all rami subequal. Telson suboval, entire, longer than broad 
EB . (Della Valle), -or distally widened with apical border slightly concave, broader 
i than long (Bonnier).. Colour ivory white with pale dorsal markings, or 
greyish, dorsally tinted with ochre. L. 4—5 mm. 


® h Mediterranean, North-Atlantie (France, Great Britain). 


u: 3. C. hamifera Kossm. 1880 C. hamifer, Kossmann, Reise Roth. Meer., v.21 
E: Malacost. p.136 t.15 f. 1-10 | 1893 C. pusilla (part.), A. Della Valle in: F. Fl. Neapel, 
Di v.20 p. 854. 


Like C. pusilla (p. 207) (of which it is perhaps a young J) except in 
. the following respects. Antenna 1 rather more slender than the equally long 
antenna 2. Gmnathopod 1, 3% joint short. Gmathopod 2, 5% joint as broad as 


Be ee a TEE En zeEr Scheren 302 Free ES ee nn a ei 
"u EN = + Be A I ER re ae “ig ker) 


208 Colomastix, Lafystiidae, Lafystius 


long, shorter than the large 6*%, which is oblong oval, with obscurely defined 
undivided palm. Uropod 1, one ramus slender, the other a little longer 
and very much broader, except at the rather abruptly acute apex. Telson 
(in fig.) seemingly oval. L. 2:5 mm. 


Red Sea. 


14. Fam. Lafystiidae 


1893 Laphystiidae, G. ©. Sars, Crust. Norway, v.1 p. 382. 


Body depressed. Head, rostrum broad, tapering, not acute. Side- 
plate 4 the deepest. Eyes distinet. Antenna 1 stouter and longer than 
antenna 2, no accessory flagellum. Upper lip entire, 
distally narrowed. Lower lip without inner lobes. Mandible, 
eutting edge dentate, accessory plates on left and right, no 
spine-row or molar, palp large, 39 joint longest. Maxilla 1, 
inner plate with 3 setae, outer with 8 spines, palp rudi- 
mentary, nodiform. Maxilla 2, outer plate longer than 
inner, inner setiferous on inner margin. Maxillipeds 
(Fig. 54), inner plates narrow, not short, outer large, 


Fig. 54. overlapping the 2-jointed palp. Gmathopod 1 simple, 
are raonnga gnathopod 2 weakly subchelate. Peraeopods 1—5 stout, 


subequal, finger uncinate. Uropod 3, rami obtuse, inner 
the longer. Telson small, entire. 


Marine. 


1 genus, 1 species. 


1. Gen. Lafystius Krayer 


1842 Lafystius (Sp. un.: L. sturionis), Kroyer in: Naturh. Tidsskr., v.4 p. 156 | 
1888 L., T. Stebbing in: Rep. Voy. Challenger, v.29 p.898 | 1893 L., A. Della Valle 
in: F. Fl. Neapel, v.20 p. 587 | 1846 Laphystius (nom. em.), L. Agassiz, Nomenel. zool., 
Index p.200, 202 | 1876 L., Lafystius, A. Boeck, Skand. Arkt. Amphip., v.2 p.250, 712 | 
1893 Laphystius, G. O.Sars, Crust. Norway, v.1 p.383 | 1856 Darwinea (nom. nud.), 
Bate in: Rep. Brit. Ass., Meet. 25 p.58 | 1857 Darwinia (Sp. un.: D. compressa), Bate 
in: Ann. nat. Hist., ser.2 o.19 p.14l | ?1870 Dermophilus (Sp. un.: D. lophii) (non 
Dermatophilus Guerin-Möneville, 1829—38, Diptera), E. Beneden & Bessels in: Möm. 
cour. Ac. Belgique, v.34 nr.4 p.26 | ?1873 Ichthyomyzocus (part.), E. Hesse in: Ann. 
Sei. nat., ser.ö ©.17 nr.7 p.5 | ?1877 Desmophilus, Huxley, Man. Anat. Invert., p. 367. 


With the characters of the family. 


1 species. 


1. L. sturionis Kroyer 1842 L.s., Kroyer in: Naturh. Tidsskr., v.4 p: 157 | 

1875 L. s., Schiedte in: Naturh. Tidsskr., ser.3 v. 10 p.237 t.5 f.9---18 | 1876 L. s., 

A. Boeck, Skand. Arkt. Amphip., v.2 p.252 t.19 £.6 | 1888 L. s., T. Stebbing in: Rep. 
Voy. Challenger, v.29 p.899 t. 137» | 1893 L. s., A. Della Valle in: F. Fl. Neapel, v.20 

p-588 1.6 f.8; t.32 f£.20—37 | 1893 Laphystius s., G. O. Sars, Crust. Norway, v.1 

p.384 t.134 | 1856 Darwinea compressus (nom. nud.), Bate in: Rep. Brit. Ass., Meet.25 

p.58 | 1857 Darwinia compressa, Bate in: Ann. nat. Hist., ser.2 «.19 p.141 | ?1870 

Dermophilus lophi, E. Beneden & Bessels in: M&m. cour. Ac. Belgique, v.34 nr.4 p.26 | 

?1873 Ichthyomyzocus morrhuae, E. Hesse in: Ann. Sei. nat., ser.5 «. 17 nr.7 p.7 

t.4 £.3—7. 


Lafystius, Laphystiopsidae, Laphystiopsis 209 
. Back broad, smooth. Head depressed, rostrum tapering to truncate apex, 
reaching end of 1° joint of antenna 1. Side-plates 1—3 rounded quadrangular, 
4th much deeper, acutely triangular below, 5t" and 6!" with hind lobe acutely 
produced downward. Pleon segment 3, postero-lateral corners obtusely quadrate, 
segments 4—6 flattened. Eyes round, prominent, lateral, dark. Antenna 1, 
15 joint longer than 24 or 34, all stout, flagellum as long as peduncle, 
tapering, 6 joints with sensory faseicles. Antenna 2 shorter, much more slender, 
ultimate joint of pedunele longer than penultimate, flagellum rather longer 
than peduncle, 8-jointed. Gnathopod 1 feeble, almost unarmed, 5t% joint 
shorter than narrowly oblong 6", finger long, ‚weak, nearly membranous. 
 Gmathopod 2 stouter, 5tk joint subequal to nearly quadrangular 6t%, the small 
palm slightly produced, much overlapped by the rather stout and curved, 
bidentate finger. Peraeopods 1—5, 4tk joint rather wide, not long, finger 
strong, hooked. Peraeopods 1 and 2, 6% joint stout. Peraeopods 3—5, 24 joint 
oval quadrangular, in peraeopod 5 angled at lower hind corner. Uropod 1, 
- rami subequal, uropods 2 and 3, outer ramus shorter than inner; uropod 3, rami 
unarmed, ending obtusely. Telson rounded oval. Colour white, more or 
less pellucid. L. 7 mm. 


North-Atlantie and Mediterranean (from A Trondhjemsfjord to the Gulf of 
Salerno). On various fishes, Raja batis L., Lophius piscator L., Gadus morhua LE, 
Acipenser’ sturio L., Galeus galeus di). 


15. Fam. Laphystiopsidae 
1899 Laphystiopsidae, T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p.211. 


Body depressed. Head, rostrum broad, not tapering. Side-plates all 
shallow, 5! the deepest. Eyes rudimentary. Antenna 1 slender, longer 
than antenna 2, no accessory flagellum. Upper lip apically broad, bilobed. 
Lower lip with small inner lobes. Mandible, eutting edge denticulate, 
accessory plate on left and right, no spine-row, molar weak, conical, palp 
slender, 34 joint longest. Maxilla 1, inner plate with 1 seta, outer with few 
spines, palp large, 1-jointed. Maxilla 2, inner and outer plates small, subequal, 
only setose at apex. Maxillipeds, inner plates short, outer small, not over- 
lapping 1° joint of 4-jointed palp. Gnathopods 1 and 2 small, simple. 
Peraeopods 1—5 not robust, 24 joint in all somewhat expanded, most in 
peraeopod 5, which is notably the longest. Uropod 3, peduncle very short, 
rami lanceolate. Telson entire. 

Marine. 


1 genus, 1 species. 


1. Gen. Laphystiopsis 0. Sars 


1893 Laphystiopsis (Sp. un.: L. planifrons), G@.O. Sars, Crust. Norway, v.1 p.386. 
With the characters of the family. 


1 species. 


1. L. planifrons O. Sars 1893 L.p., G.O.Sars, Crust. Norway, v.1 p.386 t.135. 


Body rather slender, depressed anteriorly, segments imbricated. Pleon 
segments 3 and 4 with compressed gibbous dorsal projection, preceded in segment 4 
Das Tierreich. 21. Lief.: T.R.R. Stebbing, Amphipoda I. 14 


210 Laphystiopsis, Acanthonotozomatidae, Odius 


by a deep depression. Head depressed, rostrum horizontal, lamellar, broadly 
truncate, at its base forming lateral ridges on head. Side-plates 1—4 small, 
not contiguous, simple, 5!" and 6!" bilobed, 5 larger than any. Pleon segment 3 
less deep than 24, narrower below, postero-lateral corners rounded. Eyes 
represented by 2 irregular patches of reddish pigment, coated with chalky white. 
Antenna 1, 1% joint distally widened, rather longer than 24, 34 short, flagellum 
more than thrice as long as pedunele, with 24 joints, 1°t longest, with 4 sensory 
fascieles. Antenna 2 much shorter, ultimate and penultimate joints of pedunele 
. subequal, flagellum twice as long as pedunele. Gnathopods 1 and 2, 5tk joint 
about as long as and rather wider than simply eylindrie slightly eurved 6%, 
finger small, strong, hooked. Peraeopods 1 and 2 with 24 joint broad, and 
4th a little widened, otherwise very like the much smaller gnathopods 1 and 2. 
Peraeopods 3—5 successively longer. Uropods 1 and 2, outer ramus much 
the shorter, uropod 3, rami spinulose, acute, outer little shorter than inner. 
Telson nearly semieireular. Colour whitish. L. © 8 mm. 


Christianiafjord, Trondhjemsfjord, Arctic Ocean (Selsövig [Nordland]). Depth 
188--752 m. 


16. Fam. Acanthonotozomatidae 


1871 Subfam. Iphimedinae, A. Boeck in: Forh. Selsk. Christian, 1870 p.178 | 
1888 Iphimedidae, T. Stebbing in: Rep. Voy. Challenger, v.29 p.882 | 1893 IL, G. 0. 
Sars. Crust. Norway, v.1 p.372 | 1893 Dexaminidi, A. Della Valle in: F. Fl. Neapel, 
v.20 p. 556. 


Integument more or less indurated, processiferous. Head rostrate. 
Side-plates well developed, 1% —4tk usually acuminate. Eyes well developed. 
Antennae 1 and 2 seldom elongate or very different in length, accessory flagellum 
absent or rudimentary. Mouth-parts projeeting downward, and drawn out as 
if for piereing rather than biting. Gnathopod 1 very slender and feeble, 
simple or chelate; gnathopod 2 seldom strong. Peraeopods 3—5, 24 joint 
expanded, usually acute. at one or more points of. hind margin. Uropod 3, 
rami lanceolate. Telson unarmed, apically emarginate. 


Marine. 


4 genera, 11 accepted species and 3 doubtful. 


Synopsis of genera: 
f Maxilla 1, palp 1-jomted ....... 1. Gen. Odys 7.2... 4 p- 210 
\ Maxilla 1, palp 2-jointed — 2. 
Maxilla 1, palp not reaching apex of outer 
0 RE a ee 2. Gen. Panoploea . . . . . p.211 
| Maxilla 1, palp reaching Beyond apex of 
outer plate — 8, 


f Gnathopod 1 minutely chelate . . . . . 3. Gen. Iphimedia . . . . . p. 214 


. \ Gnathopod 1 simple, wholly unchelate . 4. Gen. Acanthonotozoma . p.218 


1. Gen. Odius Lillj. 


1862 Otus (Sp. un.: O. carinatus) (non Jac. Hübner 1816, Lepidoptera!), Bate, 
Cat. Amphip. Brit. Mus., p.125 | 1865 Odius (nom. nov.), W. Lilljeborg in: N. Acta 
Soe. Upsal., ser.8 ©.6 nr.1 p.18 (tabella), 19 | 1893 O., G. O. Sars, Crust. DOrHen, v1 
p. 380 | 1893 O., A. Della Valle in: F. Fl. Neapel, v.20 p. 581. 


Odius, Panoploea 211 


Integument indurated, body compressed, carinate. Head, lateral corners 
well developed. Side-plates 1—4 rather large. Antennae 1 and 2 very short. 
Upper lip narrow, tapering, minutely bifid. Lower lip without inner lobes, 
outer acutely produced. Mandible produced to acute eutting edge, spine-row 
long, - spines short, molar distinet, small, palp slender, almost unarmed. 
Maxilla 1, inner plate small, tapering, outer elongate, tapering to. acute 
point, palp a minute conical joint. Maxilla 2, both plates long, narrow, 
obliquely truncate, inner the shorter. Maxillipeds, inner plates long, narrow, 
outer reaching much beyond 2 joint of palp, palp not long, finger minute. 
Gnathopod 1 feeble, slender, minutely chelate. Gmathopod 2 rather robust, 
subchelate. Peraeopods 1—5 stout, subequal, peraeopods 3—5, 24 joint 
expanded. Uropod 3, rami very unequal. Telson oblong, minutely ineised. 


1 species. 


1. ©. carinatus (Bate) 1862 Otus ce., Bate, Cat. Amphip. Brit. Mus., p. 126 
t.23 f.2 | 1871.Odius e., A. Boeck in: Forh. Selsk. Christian., 1870 p. 182 | 1893 O. e., 
G. ©. Sars, Crust. Norway, v.1 p.381 t.135 f.2 | 1893 O.c., A. Della Valle in: F. Fl. 
Neapel, v.20 p.582 t.58 f. 86, 87. 
Short and stout but highly compressed, carinate from peraeon segment 1 
to pleon segment 3, on pleon segment 2 with obtusely rounded projection, 
on segment 3 with erect acute process. Head, rostrum acute, vertical, well 
overlapping 1°* joint of antenna 1, lateral corners forming a large triangular 
lobe. Side-plate 1 tapering to obtuse point, 24 and 34 slightly narrowed below, 
4th hroad below, hind margin oblique below emargination, 5!" and 6 with 
hind lobe truncate. Pleon segment 3, postero-lateral angles acutely but slightly 
‚ produced, a sharp ceurved tooth higher up below a deep sinus. Eyes reniform, red. 
Antenna 1, 1° joint subequal to 2 and 32 combined, flagellum much shorter than 
peduncle, with 7 joints, last 3 very small, with long sensory filaments. Antenna 2 
shorter, flagellum scarcely longer than ultimate joint of peduncle. Gnathopod 1, 
24 joint widened proximally, rest of limb very slender, 5th joint narrow, 
much longer than 6t%, which is curved and forms a very small chela. Gnatho- 
pod 2, 4% joint produced into a narrow lobe, 5!" short, euplike, but narrowly 
produced, 6th hroad, widening distally, palm nearly transverse, finely denticulate. 


FE Peraeopods 1—5, 4th joint strongly produced over 5t, finger strong, curved, 


zu 
= 


peraeopods 3—-5, 24 joint quadrate, lower hind angle broadiy emarginate 
or slightly bilobed. Uropod 3, outer ramus much narrower than inner, and 
little more than "/, as long. Telson more than twice as long as broad, 
tapering to minutely incised apex. Colour whitish or variegated with dark 
brown shadings. L. © about 5 mm. 

Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (Greenland, Spitzbergen, 
Arctie America, Norway, Shetland Isles). Moderate depths to 113 m; on rocky bottom, 
among Algae and Hydroids. 


pe 


2. Gen. Panoploea G. M. Thoms. 


1880 Panoploea (part.), &. M. Thomson in: Ann. nat. Hist., ser.5 v.6 p.2 | 1881 
Panoplaea, G. M. Thomson in: Tr. N. Zealand Inst,, v.13 p.212 | 1893 Iphimediopsis 
(Sp. un.: I. eblanae), A. Della Valle in: F. Fl. Neapel, 0.20 p. 585. 

Back broadly rounded, some segments produced into teeth. Rostrum 
acute. Side-plates 1—3 more or less acutely tapering, 4tt with projecting 
point of hind margin. Upper lip somewhat narrowed distally. Lower lip without 
inner lobes, outer ineised on inner margin near apex. Mandible narrowly 
tapering to cutting edge, accessory plate narrow, no spine row, molar exceedingly 

14* 


212 Panoploea 


feeble, 39 joint of palp not very long. Maxilla 1, inner plate with several 
setae, outer with 10(?) spines, palp 2-jointed, not reaching extremity of 
outer plate. Maxilla 2, outer plate the longer, rather the narrower, obliquely 
truncate, inner still more so and fringed for half its length. Maxillipeds, 
inner and outer plates long and narrow, outer fringed on distal part of. outer 
margin, 1% joint ofpalp notaslong as 22and 3% combined, 2% much produced along 
inner margin of 34, finger wanting. Gnathopods 1 and 2 very slender, gnatho- 
pod 1 with very small chela, gnathopod 2 more or less chelate. Peraeo- 
pods 3—5, 24 joint well expanded. Uropod 3, rami narrowly lanceolate. 
Telson broadly ineised at apex. 
3 species accepted, 1 doubtful. 


z 


Synopsis of accepted species: 
Peraeopods4and5, 24 joint withlowerhind cornerrounded 1. P. spinosa . p. 212 
5 | Peraeopods 4 and 5,24 joint with lower hind eorner acute — 2. 
9 Peraeopod 5, 2d joint with an upper tooth on hind margin 2. P. eblanae . p. 212 
| Peraeopod 5, 2d joint without upper tooth on hind margin 3. P. minuta . p.213 


1. P. spinosa G. M. Thoms. 1880 P.s., G. M. Thomson in: Ann. nat. Hist., 
ser.5 v.6 p.3 t.1 f.2 | 1881 Panoplaea s., G.M. Thomson in: Tr. N. Zealand Inst., 
v.13 p.213 | 1888 Iphimedia s., T. Stebbing in: Rep. Voy. Challenger, v.29 p.524 | 1893 
I. s., A. Della Valle in: F. Fl. Neapel, v.20 p. 585. 

Peraeon broad, smooth, 7'% segment and pleon segments 1 and 2 dorsally 
produced into 2 teeth. Rostrum nearly reaching apex of 1° joint of antenna 1. 
Side-plates 5 and 6, hind lobes rounded. Pleon segments 2 and 3, postero-lateral 
eorners acute, scarcely produced. Eyes long, narrow, curved, pale reddish. 
Antenna 1, 1% jointlonger than 24 and 34 combined, with an apical tooth, 24 with 
2 apical teeth, flagellum with 22 rather long joints, many with sensory filaments, 
1st joint longest. Antenna 2 shorter, ultimate joint of peduncle rather shorter 
than penultimate, flagellum with 44 joints, all short except 1%. Upper lip slightly 
narrowing to insinuate apex. Mandible, apieal tooth obscurely subdivided, 
to the rear a 24 tooth probably representing the accessory plate, but apparently 
not free, molar a thin expansion slightly fringed with minute spinules, 34 joint 
of palp short, scarcely longer than 1°; its blunt apex obliquely truncate, 
slightly fringed, 24 joint little longer than 34. Maxilla 1, inner plate with 
9 setae on oblique distal margin, outer with 10 spines, palp not rudimentary, 
but not reaching end of outer plate. Triturating lobes of stomach very 
small, with minute spine-teeth. Gnathopod 1, 5t" joint tapering, much longer 
than 6", otherwise as in Iphimedia (p. 214), with small finger opposed to 
very slender thumb. Gnathopod 2 rather stouter, 5!" joint shorter than 6", 
which widens a little distally and forms a little distinet chela with the small 
finger. Peraeopods 3—5, 24 joint strongly expanded, rounded oval, hind 
margin strongly serrate. Uropod 2, rami very unequal, uropod 3, pedunele 
with acute points, rami only a little unequal. Telson longer than broad, 
slightly tapering, apex widely not deeply emarginate. Marsupial plates large 
and long. Colour varying from light to dark brown, thickly covered with 
black stellate markings. L. 11 mm. 

Dunedin Harbour [New Zealand]. Depth 7—9 m. 


2. P. eblanae (Bate) 1857 Iphimedia e., Bate in: Nat. Hist. Rev., «.4 P. Soc. 
p- 229 t.16 f. 1—7 | 1893 Iphimediopsis e., A. Della Valle in: F. Fl. Neapel, v.20 p.586 
t.6 f.5 (inaceurate); t.32 f.1—19; t.58 f.93 | 1864 Iphimedia multispinis, E. Grube 
in: Arch. Naturg., v. 301 p.202 t.5 f.1!1864 I. m., E. Grube in: Jahresber. Schles. 
Ges., v. 41 p.58 | 1866 IT. eblanae + I. carinata, Cam. Heller in: Denk. Ak. Wien, 
v.2611 p. 28, 29 | ?1875 I. corallina, Catta in: Rev. Sei. nat., v.4 p. 164. 


E 
3 4 
E 


re 
Ei: 


Sa ai RR EE N 
n ET #3 


Panoploea 213 


Body stout. Peraeon segment 7, pleon segments 1—3 dorsally produced 
into a pair of strong teeth, pleon segments 1—3 also armed with a medio- 
dorsal earina-tooth. Rostrum flat above, narrow, reaching end of 1° joint of 
antenna 1. Side-plates 1-—3 pointed below, 4! with 2 emarginations, 5t— 7th 
with a backward direeted point. Pleon segments 2 and 3, postero-lateral corners 
acute, segments 1—3 with a medio-lateral tooth, in segment 3 all the teeth rather 
upturned. Eyes subreniform, bright red. Antenna 1, 1° joint longer than 24 and 
34 combined, produced into 2 strong unequal apical teeth, 24 produced into 1 
apical tootlı, flagellum longer than pedunele, 16-jointed. Antenna 2 rather 
longer, ultimate and penultimate joints ofpeduncle subequal, flagellum 20-jointed. 
Upper lip figured by Della Valle with truncate apex. Mandible, accessory 
plate doubtfully free, 24 joint of palp much the longest (as figured). Maxilla 1, 
palp very small, joints equal, inner plate with only 4 setae (Della Valle). 


.Gnathopod 1 very slender, 5tk joint longer than 6*%, chela.very delicate 


with 7 setae. Gnathopod 2 stronger, 5th joint subequal to 6", which widens 
distally and at apex is produced into a rounded lobe against which the 
small finger impinges more or less chelately, hind margin fringed with 
setules. Peraeopods 1—5, 6!" joint spinose, finger strong. Peraeopods 3—5, 
24 joint quadrate, produced above into a strong tooth, lower hind angle 
acute. Uropod 1, rami as long as pedunele, uropod 2, rami rather shorter than 
pedunele, uropod 3, rami much longer than pedunecle. Telson short, boat- 
shaped, apex emar ginate. Colour variable, pinkish-white, with transverse 


bands of orange spots (Grube), sometimes entirely orange-yellow (Della Valle). 


L. about 7 mm. 
North-Atlantie (Ireland), Mediterranean. Depth 50 m, on coralline bottoms; 


also from Rhizostoma euvieri Per. & Les. 


3. P. minuta (0. Sars) 1874 Iphimedia eblanae var., T. Stebbing in: Ann. 
nat. Hist., ser.4 v.14 p.11 t.2 f.4 | 1882.I. minuta, G.O. Sars in: Forh. Selsk. Christian., 
nr.18 p.100 t.5 f.2 | 1893 I. m., G. O. Sars, Crust. Norway, v.1 p.879 t.133 f.1 | 1893 


-I. obesa (part.), A. Della Valle in: F..Fl. Neapel, v.20 p. 584. 


Peraeon segment 7, pleon segments 1—3 dorsally produced into a 
pair of strong teeth, with. no medio-dorsal tooth. Rostrum strongly curved, 
about reaching apex of Ist joint of antenna 1. Side-plates 1—-4 as in P. eblanae, 
5th and 6" subtruncate on hind lobe, 7tk rounded. Pleon segments 2 and 3 as in 


P. eblanae. Eyes large, reniform, dark red. Antenna 1, 1° joint produced to 
. apical tooth not very large or acute, flagellum about twice as long as peduncle. 


Gnathopod 1, 5t% joint subequal to 6%, chela very delicate, with a few setae. 
Gnathopod 2, 6'% joint produced so as to make an almost perfect chela. Peraeo- 
pods 3—5, hind margin of 24 joint rounded above, not produced into a 
tooth, quadrate below, and in peraeopod 5 sharply produced, 4% joint decurrent. 
Uropod 3, inner ramus considerably longer than outer. Telson oblong 
quadrangular, scarcely tapering, broadly and angularly emarginate between 
acute apical points. Colour variable with bright bands, or dark brown 
shadows, or nearly black. L. © 5—6 mm. 


North - Atlantie, North -Sea and Skagerrak (South- and West-Norway, British 
Isles); Mediterranean. 


P. ambigua (Hasw.) 1880 Iphimedia? a., Haswell in: P. Linn. Soc. N.S.Wales, 
v.4 p.327 t.24 f.2 | 1893 I. obesa (part.), A. DellaValle in: F. Fl. Neapel, v.20 p.584. 

Intermediate between P. eblanae and P. minuta. 

L. 2:5—3:75 nım. 

Port Jackson [East-Australia]. 


‚214 Iphimedia 


3. Gen. Iphimedia H. Rathke 


1843 Iphimedia (Sp. un.: I. obesa), H. Rathke in: N. Acta Ac. Leop., v.201 p.85 | 
1888 I., T. Stebbing in: Rep. Voy. Challenger, v.29 p.889 | 1893 I., G. O. Sars, Crust. 
Norway, v.1 p.876 | 1893 I., A. Della Valle in: F. Fl. Neapel, v.20 p.582 | 1846 Micro- 
cheles (Sp. un.: M. armata), Kroyer in: Naturh. Tidsskr., ser.2 v.2 p.58, 66. 


Back broadly rounded, some segments produced into teeth. Rostrum 
acute. Side-plates 1--3, at apex simply acute or bidentate, 4!" with projecting 
tooth between 2 emarginations. Eyes well developed. Antennae 1 and 2 not 
greatly differing in length. Upper lip little or not emarginate. Lower lip 
having outer lobes ineised on inner margin, thus forming an inner process, 
which may or may not represent the inner lobe. Mandible rather broadly 
tapering to blunt obscurely dentate cutting apex, accessory plate rather long, 
spine-row wanting, molar feeble (or sometimes wanting?), palp rather strong. 
Maxilla 1, inner plate with several setae, outer with (always?) 11 spines, 
palp 2-jointed, reaching beyond apex of outer plate. Maxilla 2 and nıaxillipeds 
as in Panoploea (p. 211). Gnathopods 1 and 2 very slender, delicately chelate, 
32 joint not very short; 24 joint in gnathopod 1 sinuous. Peraeopods 3—5, 
24 joint well expanded. Uropod 3, rami narrowly lanceolate. Telson broadly 
ineised at apex. 


4 species accepted, 2 doubtful. 


Synopsis of accepted species: 
1 f Side-plates 5—7 not acutely produced backward 1. Lobesa. .... . p- 214 
1 Side-plates 5—7 acutely produced backward — 2, 
f Side-plates 5—7 forming each 2 acute processes 2. I. pulchridentata . p.215 


2 \ Side-plates5—7 forming each 1 acute process — 3. 
Of peraeon segments only 7th with a pair of dorsal 
3 BER ARTE AT ER RE 3.:L paeiflca : : ».. « .:p.215 
{ Of peraeon segments 4th—7th each with a pair 
oL-Borakl iueih ET ern 4. L’n0odosa 5’... p- 216 


1. L. obesa H. Rathke 1843 I. o., H. Rathke in: N. Acta Ac. Leop., ©.201 p.85 
t.3 £.1A—Q | 1876 I. o., A. Boeck, Skand. Arkt. Amphip., v.2 p.245 t.18 £.l1d—k 
1889 I. o., Hoek in: Tijdschr. Nederl. dierk. Ver., ser: 2 v0.2 p.194 t.7 f.6 | 1893 I. o., 
G.O.Sars, Crust. Norway, v.1 p.377 t.132 | 1893 I. o. (part.), A. Della Valle in: F. Fl. 
Neapel, ©.20 p.584 t.58 f.92 | 1846 Microcheles armata, Kroyer in: Naturh. Tidsskr., 
ser.2 v.2 p.58 | 1846 M. a., Kroyer in: Voy. Nord, Crust. t. 11» f. 2a—v. 


Peraeon segment 6, pleon ‚segments 1—3 dorsally produced into 
2 teeth. Head, rostrum strongly curved, overlapping. 1° joint of antenna 1, 
lateral corners deflexed, acute. Side-plates 1—3 tapering to acute apex, 5th 
and 6% with hind lobe the deeper, subtruncate at apex. Pleon segments 2 and 3, 
postero-lateral angles acute, segment 3 having an upper tooth subequal to the corner 
one. Eyes large, reniform, dark red, scarlet, or purplish. Antenna 1, 1° joint longer 
than 24 and 34 combined, forming a large apical tooth, 24 with small tooth, 
flagellum nearly thrice as long as peduncle, with about 24 joints, each with fasciele 
of sensory setae, more strongly developed inJ. Antenna 2 scarcely longer, ulti- 
mate joint of,pedunele longer than penultimate, flagellum about twice as long as 
peduncle. Upper lip distally narrowed, slightly emarginate. Mandible, accessory 
plate distinet on both left and right, molar almost obsolete, palp sturdy, 3% joint 
curved, much longer than 1°. Maxillipeds, 1° joint of palp as long as 24 and 34 
combined, finger wanting (Sars) or rudimentary (Boeck). Gmathopod 1 very 
slender, 5" joint rather shorter than 6tt, chela about '/, length of 6tk joint, 
thumb not stouter than apically dentieulate finger. Gnathopod 2 rather stouter, 


Iphimedia. 215 


Hr and 6 one subequal, 6!" setose, very slightly expanding to the chela, 
- which is less than ’/, of the whole length, thumb much stouter than finger. 
- Peraeopods 3—5, 24 joint oval quadrangular, the lower hind angle a little 
produced only in peraeopod 5, 4% joint decurrent. Uropod 3, rami long, 
nearly equal. Telson oblong, little tapering, angularly incised between 
= — 2 acute apices. Colour variable, whitish, striped with rosy pink, or lemon- 
> © <oloured, or purplish grey. L. © reaching 12 mm, < less. 

; Arctie Ocean, North-Atlantie, North-Sea, Skagerrak and Kattegat (Scandinavia, 
“reat Britain, France, Holland). 


2. I. pulchridentata Stebb. 1883 I.p., T. Stebbing in: Ann. nat. Hist., ser.5 
v.11 p.208 | 1888 I.p., T. Stebbing in: Rep. Voy. Challenger, v.29 p.894 t.72 | 1893 
I. p., A. Della Valle in: F. Fl. Neapel, v.20 p.583 t.58 £. 88. 


= Peraeon broad rounded, pleon rather compressed. Peraeon segments 6 and 7, 
3 pleon segments 1 and 2, each with 2 large acute backward direeted processes, 
3 pleon segment 3 with 1 such process, on either side of medio-dorsal line, 
pleon segments 1—4 carinate, the carina forming in each a large tooth, 
with an accessory tooth in segments 2 and 3. Peraeon segments 1-7 with 
postero-lateral angles sharply produced, in 6th and Ttk forming long downward 
ee curving processes. Head, rostrum long, acute, downward curving, nearly reaching 
” apex of 1% joint of antenna 1, lateral angles produced into 2 sharp processes 
—  <eurving one towards the other. Side-plates 1—3 ending below in 2 acute 
processes, side-plate 2 rather narrower than 1° or 34; side-plate 4 narrow, 
very acute below, the lower emargination much longer than the upper; 
. side-plate 5 bilobed, hind lobe produced backward in 2 large processes, 
side-plate 6 not bilobed, produced into 2 long processes, side-plate 7 into 
an upper long and lower short process. Pleon segments 1 and 2, postero-lateral 
angles acute, little produced, a very large process on the margin above, in 
pleon segment 3, the angle- strongly produced in upeurving tooth with similar 
5 one above. Eyes round, rather prominent. Antenna 1, 1° joint with tooth 
 .  mear base and 3 unequal distal teeth, 29 joint with 1 short and 1 very 
3 long distal tooth; possibly a 1-jointed accessory flagellum is present... Antenna 2, 
joints of pedunele dentate, ultimate and penultimate joints equal, flagellum with 
about 30 joints or more. Upper lip not narrowed, slightly convex. Lower lip, 
inner edge only a little emarginate. Mandibles, cutting apex undivided, accessory 
2 plate dentate on both mandibles, more strap-like on right, molar not dentate, 
 \ joint of palp rather longer than 1%. Maxilla 1, 10 setae on inner plate, 
11 spines on outer, 24 joint of palp reaching much beyond outer plate. 
Maxillipeds, 3 joints -of palp nearly equal, 1°t rather the longest. Gnatho- 
pods 1 and 2 closely resembling those of I. pacifica. Peraeopods 3—5, 24 joint 
smooth in front, behind cut into various unequal large acute processes, largest 
on peraeopod 5, 4% joint strongly and very acutely decurrent. Uropod 3, 
peduncle short, with 3 unequal apical teeth, rami rather broad lanceolate, 
unequal. Telson longer than broad, tapering pretty strongly, emarginate 
more than a quarter the length, between 2 spine-tipped apices. L. 13 mm. 
Southern Indian Ocean (Heard Island). Depth 136 m. 


3. I. pacifica Stebb. 1883 I.p., T. Stebbing in: Ann. nat. Hist., ser.d vll 
M p- 207 | 1888 I. p., T. Stebbing in: Rep. Voy. Challenger, 0.29 p.890 t.71 | 1893 I. p., 
2 A. Della Valle in: F. Fl. Neapel, v.20 p. 583 t.58 £.89. 

Peraeon segment 7, pleon segments 1 and 2 dorsally produced into 2 strong 
teeth. All peraeon segments with lower margin produced acutely backward, 


216 Iphimedia 


7&ı strongly. Pleon segments 1—3 with rudimentary dorsal carina. Head, rostrum . 
long, nearly reaching apex of 1° joint of antenna 1, lateral angles acutely 
bidentate. Side-plates 1—4 as in I. obesa (p. 214), 5% —7th with a strong backward 
pointing acute process. Pleon segments 1—3, postero-lateral angles strongly 
and acutely produced, each also with an 
acute upper tooth, that on segment 3 bent 
upward, serrulate below, segment 6 acutely 
produced on each side ofthe telson. Eyes small, 
oval. Antenna 1, 1° joint longer than 24 
and 39 combined, apically produced to a long 
acute tooth and a shorter bifid one, 24 also 
produced to a bifid tooth, flagellum longer 
than peduncle, about 20-jointed. Antenna 2, 
penultimate joint of pedunele with short apical 
teeth, rather longer than ultimate, flagellum 
longer than pedunele, 35-jointed. Upper 
lip distally narrowed, truncate. Mandible, 
Fig. 55. I. paeifica. dentation of cutting apex rather distinet, 
Maxillipeds. accessory plate on left mandible strap-shaped, 
distinct, its presence on right indistinet and 
doubtful, molar on left feeble, distinet, on right without perceptible denti- 
eulation, palp with 1° joint rather long, yet not as long as 34. Maxilla 1, 
inner plate with 7 or 8 setae, outer with 11 spines, 18! joint of palp more than '/, 
as long as 24. Maxillipeds (Fig. 55), 1° joint of palp not as long as 24 and 
34 combined, finger wanting. Gnathopod 1, 5th joint slightly longer than 6th, 
both very narrow, chela very small, beset with setae, finger with hooked 
apex and 2 retroverted teeth on inner margin. Gnathopod 2 rather stouter, 
5th and 6th joints subequal, 6!" setose, chela minute. Peraeopods 3—5, 
22 joint with sinuous strongly serrate hind margin, lower margin also serrate, 
meeting in sharp tooth, strongest in peraeopod 5, 4 joint very decurrent. 
Uropod 3, peduncle short, with 3 acute distal processes, one of the rami 
long, the other at present unknown. Telson concave above, oblong, distal 
border with small emargination at centre, lateral apices acutely produced. 
L. about 8 mm. 


Southern Indian Ocean (Heard Island, depth 273 m; Kerguelen Island, depth 
231 m). 


Outer plate 


Palp, 
ıst joint 


4. I. nodosa Dana 1852 Amphitoen., I.n., Acanthosoma n., J. D. Dana in: 
P. Amer. Ac., v.2 p.217 | 1853 &55 I.n., J. D. Dana in: U. S. expl. Exp.. 0.1311 p.928; 
t.63 f.3a,b | 1893 I.n., A. Della Valle in: F. Fl. Neapel, v.20 p. 583 t.58 f.89, 90. 


Integument crustaceous, peraeon segments 4—7 each with a pair of 
dorsal teeth to the hind margin, small, tubereular on segment 4, successively 
larger on following segments, with a subsidiary tooth at each side; there 
is also a little above the side-plates a lateral carina, forming a backward 
produced tooth to each of these segments. Pleon segments 1—3 have also 
the pair of dorsal teeth, very.large, upturned at tip on segment 3, accompanied 
by accessory tooth on segments 1 and 2, in all 3 preceded by a large dorsal 
central upstanding tooth or process, segment 4 has a little medio-dorsal 
triangular hump. Head, rostrum produced to end of 1° joint of antenna 1, 
lateral corners produced not quite so far, with apical notch. Side-plates 1 and 2 
narrowly oblong, 3% deeper, similar, 4th axe-like, 5tt—7th each with backward 
pointing tooth. Pleon segments 1—3, each with laterzl tooth, rather upward 


Iphimedia 217 


pointing, in addition to the dorsal teeth above mentioned, segment 3 with 
-  postero-lateral corners rounded, 24 and 34 with small acute tooth. Eyes 
— round, prominent, with reddish tint in spirit. Antenna 1 the shorter, 1°* joint 
much longer and broader than 24, .with blunt process and 2 or 3 distal teeth, 
24 with rounded end overlapping the short 34, flagellum with over 30 unequal 
joints. Antenna 2, penultimate joint of pedunele with rounded distal process 
E- overlapping the narrower and shorter ultimate, flagellum about 38-jointed. 
Upper lip rather deeply and almost symmetrically bilobed. Lower lip, prineipal 
lobes broad, inner almost obsolete, mandibular processes blunt. Mandible, 
eutting edge angular with several unequal teeth, accessory plate similar to 
primary on one mandible, on the other wanting or obsolete, spine-row and 
- molar wanting, 34 joint of palp rather shorter than 24, broad-ended. Maxilla 1, 
inner plate oval, with 8 or 9 setae along distal margin, outer plate with 9 eur ved 
‘rather slender spines, not much dentate, palp with long setose 24 joint. 
Maxilla 2, inner plate with setae on distal part of inner margin. Maxillipeds, 
inner plates large, prominent, inner and truncate distal margin closely set 
with setae or slender spines, outer plates closely set with slender seta-like 
spines round all distal half, the 3 joints of palp subequal in length, 1% and 
2% broad, 34 long oval. Gmathopod 1, 24 joint sinuous, narrowest distally, 
34 longer than acute 4b, 5th narrow, subequal to the slightly tapering 6", 
= of which the little chela-forming thumb is hard to distinguish from a spine; 
I the acute tip of the short finger bends on to its apex; finger ei at base, 
— with a long setule on outer margin. Gnathopod 2 stouter, 24 joint with 
sinuous front but straight hind margin, 3% rather longer than 4a, 5th slightly 
longer than narrowly oblong 6t%, which is distally produced to a blunt end, 
3 forming a sort of chela with the closely applied, slender, not very obliquely 
Eee placed finger. Peraeopods 1 and 2, all the joints rather stout, not expanded, 
© almost bare. Peraeopods 3—5, 24 joint expanded, hind margin produced 
u into 2 teeth widely apart, the lower one strongly developed only in peraeo- 
pod 5, hinder apex of 4tk and 5th joints pretty strongly produced. Pleopods, 
peduncles fringed on outer margin, rami long, 1° joint of inner with several 
eleft spines. Uropod 1, rami slightly shorter than peduncle, outer ramus 
slightly shorter than inner. Uropod 2 much shorter than uropod 1, outer 
ramus much shorter than inner. Uropod 3, rami much longer than peduncle, 
lanceolate, outer ramus little shorter than inner. Telson oblong oval, apical 
border very faintly emarginate. L. 8--17 mm. 


South-Atlantie (Hermite Island [Tierra del Fuego], Stanley Harbour [Falkland 
Islands)). 


I.normani R. O0. Cunningh. 1871 I.n., R. O. Cunningham in: Tr. Linn. Soe. 
London, 0.27 p.498 t.59 f.7 | 1888 I.n., T. Stebbing in: Rep. Voy. Challenger, v.29 
p. 405 | 1893 I.n., A. Della Valle in: F. Fl. Neapel, v.20 p. 585. 


Head produced ‘into a sharp-pointed rostrum. Pleon segments 1—3 having a 
sharp-pointed tooth on each lateral margin. Eyes subreniform. Antennae 1 and 2 
of nearly equal length. Colour purplish. L. about 8 mm. 


„Elizabeth Island“, 


B I. stimpsoni Bate 1855 I. obesa (non H. Rathke 1843!), Stimpson in: P. Ac. 
E.» Philad., v. 7 p. 393 | 1862 I. stimpsoni, Bate, Cat. Amphip. Brit. Mus., p.374 | 1888 
I.? s., T. Stebbing in: Rep. Voy. Challenger, 0.29 p.288 | 1893 I.?s., A. Della Valle 
in: F. Fl. Neapel, «.20 p. 585. 


u Kyasr nn er Fl nz a a te N Im 
En 2. Re KEN. E a 
Ser a x he 


218 Iphimedia, Acanthonotozoma 


Robust, thick. Eyes very large, subreniform, black. Antenna 1 the longer, as long 
as ?/; length Br body, basal joints thick. Gmnathopods 1 and 2 with equal subcheliform 
hands of moderate size. Uropods 1—3 slender, smooth, uropod 3 with 2 rami. Telson 
an elongated scale. Colour erimson with flake-white blotches. L. 67 mm. 

Port Jackson [East-Australia]. In eircumlittoral zone, on weedy and sandy bottoms, 


4. Gen. Acanthonotozoma*) Boeck 


1802 Talitrus (part.), Latreille, Hist. Crust. Ins., v.3 p.38 | 1835 Acanthonotus 
(Sp. un.: A. cristatus) (non G. Cuvier 1800, Pisces!), (Rich. Owen in MS.) J. C. Ross 
in: John Ross, App. sec. Voy., nat. Hist. p. 90 | 1876 Acanthonotozoma (Sp. typ.: 
Acanthonotus ceristatus), Acanthozoma (laps.), A. Boeck, Skand. Arkt. Amphip., v. 2 
p: 237; p.229, 712 | 1888 Acanthonotozoma, T. Stebbing in: Rep. Voy. Challenger, v. 29 
p- 162 | 1894 A., T. Stebbing in: Bijdr, Dierk., e.17 p.31 | 1880 Acanthonotosoma, 
D’Urban in: Ann. nat. Hist., ser’5 0.6 p.255 | 1893 A., G. O. Sars, Crust. Norway, v.1 
p. 872 | 1893 A. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 674. 

Back strongly eurved. Rostrum acute, reaching apex of 1° joint of 
antenna 1. Side-plates 1—3 tapering to acute apex, 4!" large with 2 emargi- 
nations, 5% and 6 with hind lobe the deeper. Antennae 1 and 2 not elongate. 
Upper hip rather long, apically narrowed, unsymmetrically ineised. Lower 
lip, lobes nearly contiguous, tapering towards apex, inner lobes almost 
obsolete. Mandible elongate, tapering to narrow dentate eutting edge, accessory 
plate narrow on both mandibles, spine-row evanescent, molar obsolete, palp 
slender. Maxilla 1, inner plate triangular, with many setae, outer obliquely 
truncate, with 11 spines, palp slender, its 1° joint not very short. Maxilla 2, 
inner plate the shorter, fringed along most of inner margin, both plates 
obliquely truncate. Maxillipeds, inner plates long, outer scarcely larger, 
reaching apex of 24 joint of palp, palp rather small, finger minute. Gmnatho- 
pod 1 feeble, very slender, gnathopod 2 shorter and stouter, both pairs 
simple. Peraeopods 1—5 rather stout. Peraeopods 3—5, 24 joint quadrangular, 
lower hind corner acute. Uropod 3, outer ramus the shorter. Telson tapering 
to a slightly ineised age 

3 species. 

Synopsis of species: 

[ Carina absent from peraeon, not dentate on pleon . 3. A.inflatum. . p.219 


Carina present on peraeon, dentate on pleon — 2. 
Carina not forming acute processes on pleon segments 
| ee ER ee Sr ... 1. A.serratum . p.218 
| Carina forming acute processes on pleon segments 
EB N EN er Re 2. A. cristatum . p.219 


1. A. serratum (0. Fabr.) 1780 Oniscus serratus, O. Fabrieius, Fauna Groenl., 
p.262 | 1802 O.s., Talitrus (part.), Latreille, Hist. Crust. Ins., v.3 p.39 | 1853 Acantho- 
notus 8., Stimpson in: Smithson. Contr., ©.6 nr.5 p.52 | 1866 Vertumnus s., Goes in: 
Öfr. Ak. Förh., v.22 p.522 | 1876 Acanthonotozcma serratum, A. Boeck, Skand. Arkt. 
Amphip., v.2 p.240 | 1893 Acanthonotosoma s., G. ©. Sars, Crust. Nöser, v.1 p. 374 
t.131 f.1|1893 A.s. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.675 t.59 f.83, 84 | 
1838 Amphithoe serra, Kröyer in: Danske Selsk. Afh., ©.7 p.266 t.2 f.8 | 1840 
Acanthonotus s., H. Milne Edwards, Hist. nat. Crust., e.3 p. 25. 

Body stout, carina low on peraeon segments 1—4, on segments 5—7 and 
pleon segments 1 and 2 produced into well marked, not very large, backward 
pointing teeth, on pleon segment 3 into a laminar obtusely ending process. 
Head, lateral corners small, narrowly rounded. Side-plate 4 with am acute 


*), According to the rules of transeription this name should be written Acantho- 
notosoma. : The Editor. 


Ex 
3 
B" 


Acanthonotozoma 219 


point between the 2 emarginations, 5% and 6b with hind lobe much produced 
downward, obtuse. Pleon segments 1 and 2, postero-lateral corners forming a 
small tooth, margin above slightly serrate, in 34 2 diverging narrow lobes, the 
lower coarsely serrate on upper edge and apex. Eyes small, oval, narrow above, 

bright red. Antenna 1, 1° joint shorter than 24 and 34 combined, not dentate, 
 flagellum scarcely longer than peduncle, with about 15 joints carrying sensory 


filaments. Antenna 2 considerably shorter, ultimate joint of peduncle rather 
shorter than penultimate, flagellum shorter than ultimate and penultimate com- 
bined. Gnathopod 1, 24 joint setose on both margins, 5tk tapering, longer than 
the very narrow sth, finger awl-shaped, not dentate, beset with curved setae, 
the apical one densely eiliated on one edge. Gnathopod 2, 5% joint longer 
than 6, both spinose, finger short, broad, sublaminar with acute tip. Peraeo- 
pods 3—5, 24 joint quadrangular, slightly produced at lower hind corner. 
Uropod 3, outer ramus about °/, as long as inner. Telson oblong oval, distally 


_ tapering, ineision very short. Colour whitish, each segment with 2 or 3 narrow 


transverse bands of brilliant erimson, which extends also to bases of limbs 


and antennae. L. 9 reaching 12 mm. 

Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (Greenland, Spitzbergen, 
Barents Sea, Murman Coast, Kara Sea, North-America, Bohuslän, Norway from Hauge- 
sund northward). Depth 19—300 m. 

2. A, eristatum (J.C.Ross) 1835 Acanthonotus eristatus, J. C. Ross in: John 
Ross, App. sec. Voy., nat. Hist. p.90 t.B f.8—12 | 1838 Amphithoe eristata, Kröyer 
in: Danske Selsk. Afh., v.7 p.322 | 1866 Vertumnus eristatus, Go&s in: Öfv. Ak. Förh., 

v.22 p.522 | 1876 Acanthonotozoma eristatum, A. Boeck, Skand. Arkt. Amphip., ®.2 2 
p- 2358 | 1894 A. c., T. Stebbing in: Bijdr. Dierk., v.17 p.32 | 1893 Acanthonotosoma e., 
G.O. Sars, Crust. Norway, v.1l p.875 t.131 f.2 | 1862 Acanthonotus serratus (part.), 
Bate, Cat. Amphip. Brit. Mus., p.127 | 1893 Acanthonotosoma serratum (part.), A. Della 


"Valle in: F. Fl. Neapel, v.20 p. 675. 


Body rather compressed, carina conspicuous from peraeon segment 1 
to pleon segment 4, forming a large elevated laminar tooth on each segment, 


. except peraeon segments 1—4. Head, lateral corners small, narrowly rounded. 


Side-plate 4 with an obtuse point between the 2 emarginations, 5" and 6!" produced 
acutely backward. Pleon segments 1—3, postero-lateral eorners acute, in 
segment 3 strongly produced, not bilobed. Eyes very small, round, bright red. 
Antenna 1, 1 joint subequal to 24 and 34 combined, 1°tand '24 each with apical 
tooth, flagellum subequal to peduncle, setose. Antenna 2 scarcely shorter. Gmatho- 
pod 1, 24 joint not setose, 5 Jittle longer than linear 6%", finger with setae as in 
A.serratum and distally armed with 7 curved dentieles. Gmathopod 2, 
5th joint scarcely longer than 6%, both setose, finger small, eurved. Peraeo- 
pods 1—5 rather robust. Peraeopods 3-—-5, 24 joint oblong quadrangular, 
produced below into two acute processes. Uropod 3, outer ramus about 
”/, as long as inner. Telson scarcely longer than broad, apical ineision 
deeper than in A. serratum. Colour reddish white. -L. © 12—18°5 mm. 
. Arctic Ocean (Arctic ren Spitzbergen, Barents Sen, Kara Sea, North- 
Norway). Depth 94—246 m. 
3. A.inflatum (Kroyer) 1842 Acanthonotus inflatus, Kroyer in: Naturh. Tidsskr., 


v.& p.161 | 1866 Vertumnus i., Goes in: Öfv. Ak. Förh., 0.22 p.523 t.38 f.11 | 1876 


Acanthonotozoma inflatum, A. Boeck, Skand. Arkt. Amphip., ©.2 p.242 | 1894 A.i., 
T. Stebbing in: Bijdr. Dierk.. ©.17 2° 32 t.6 | 1880 Acanthonotosoma i., D’Urban in: 
Ann. nat. Hist., ser.5 v.6 p.255 | 1887 A.i., H. J. Hansen in: Vid. Meddel., ser. 4 v.9 
p-127 | 1893 A.?i., A. Della Valle in: F. Fl. Neapel, v.20 p. 676. 

Integument scabrous in parts. Peraeon dorsally broad, rounded, without 
carina or processes. Pleon segments 1—3 with slight median carina. Head, 


SEN ENDETE ER, RES EN EI 
BU a re Tr, N Er 


220 Acanthonotozoma, Pardaliscidae 


lateral corners bluntly produced. Side-plates 1—7 and postero-lateral corners 
of pleon segments 1—3, antennae 1 and 2, mouth-parts, gnathopods 1 and 2, 
peraeopods 1—5, uropods 1—3 very similar to those of A. serratum (p.218), telson 
agreeing rather with that of A. eristatum (p.219). Eyes rounded oval. Antennal, 
flagellum in © scarcely as long as peduncle, 23-jointed; miceroscopie rudiment of 
accessory flagellum. Upper lip less narrow than in Sars’ fig. of A. serratum. 
Mandible, 39 joint of palp much eurved. Gnathopod 1, finger in addition to setae 
like those in A. serratum having 11 backward direeted teeth in correspondence 
with A. cristatum and a stout curved nail. Gmathopod 2, finger stout, distally 
fringed with 9 denticles, ending in a stout nail. Peraeopods 3—5, the 
quadrangular 24 joint less acute at lower hind corner than in A. serratum. 
Uropod 3, outer ramus about */, as long as inner. Telson 1’/, as long as broad, 
triangular incision equal to '/, of total length. L. 6°5—18°5 mm (measurement 
made perhaps sometimes on speeimens coiled up, sometimes on extended ones). 

Arctie Ocean (Greenland, Spitzbergen, Franz ein Land, Kara Sea, White 
Sea, Matotschkin Schar). Depth 10—300 m. 


17. Fam. Pardaliscidae 


1871 Subfam. Pardaliscinae, A. Boeck in: Forh. Selsk. Christian., 1870 p.150 | 
1882 Pardaliscidae, G. O. Sars in: Forh. Selsk. Christian., nr.18 p.28 | 1888 P., T. Stebbing- 
in: Rep. Voy. Challenger, v.29 p.990 | 1893 P., G. O. Sars, Crust. Norway, e.1 p.401. 


Body not indurated. Head, rostrum usually small. Side-plates small, 
4th Jike 34, 5tb with front lobe the deeper. Eyes present or obsolete, 
never(?) coalescent. Antenna 1 usually with accessory flagellum, which 
is unlike in S and O9. Mouth-parts projecting, strongly developed. Mandible 
without molar (Fig. 56, 58, 60). Maxillipeds, inner plates small (Fig. 59). 
Gnathopods 1 and 2 subequal, either small and simple, or powerful and imper- 
fectly subchelate (Fig. 57). Peraeopods 1 and 2 unlike peraeopods 3—5, which 
are rather long, with 24 joint little expanded. Uropod 3 rather large, rami 
foliaceous. Telson deeply cleft. 


Marine. 
. 7 genera, 11 species accepted and 1 doubtful. 
Synopsis of genera: 
Antenna 1 without accessory flagellum . . 1. Gen. Halicoides . . . p. 221 
Antenna 1 with aeccessory flagellum — 2. 
Cutting edge of mandible (Fig. 56, 58, 60) 


greatly expanded — 8. 


LA 
| Cutting edge of mandible moderately ex- 


2 


panded — 6. 
Gnathopods 1 and 2 (Fig. 57), 5th joint much 
broader and longer than 6th — 4, 
Gnathopods 1 and 2, 5th joint not much 
broader or longer than 6th — 5. 
Antenna 1 with short peduncle; maxillipeds 


3 


A (Fig. 59), outer plates broad. . ... . 2. Gen. Pardalisca . . . p.221 
| Antenna 1 with long peduncle; maxillipeds, 

outer plates narrow. . ». 2.2.2.2... 3. Gen. Pardaliscoides . p. 224 

Gnathopods 1 and 2, 5thjointbroadlyexpanded 4. Gen. Nieippe. . . . - p: 225 
Gnathopods 1 and 2, 5th joint not broadly 


a BR RE a ee 5 5. Gen. Synopioides. . . p.226 


Pardaliscidae, Halieoides, Pardalisca 221 


; Mandible, 3d joint of palp long; uropod 5 
- without setae, outer ramus narrow . . . 6. Gen. Pardaliscella . . p. 227 


e Mandible, 34 joint of palp very short; uropod 3 
setose, both rami lanceolate . . . .. . 7..G@an. IBMOe  .:. ..2. p- 228 
Ei. 1. Gen. Halicoides A. Walker 
E. 1896 Halicoides (Sp. un.: H. anomala), A. OÖ. Walker in: Ann. nat. Hist., ser. 6 
u 917 p.344. 


Rostrum large. Eyes obsolete. Antenna 1 without accessory flagellum, 
1°t joint of flagellum in J elongate.e Antenna 2 longer than antenna 1. 
Bi Mandible, 34 joint of palp ?/, as long as 24, Gnathopods 1 and 2 simple, 
- finger rather long. Peraeopods 1 and 2, 4 and 5th joints much widened. 
Peraeopods 3—5 elongate, slender. Uropod 3, inner ramus rather shorter 
than outer. Telson celeft to base, apices acute, notched. 


l species. 


1. H.anomalus A. Walker 1896 H. anomala, A.O. Walker in: Ann. nat. Hist., 
ser.6 0.17 p. 344 t. 16. 


B Rostrum fully reaching apex of 1% joint of antenna 1. Side-plates small. 
— Pleon segments 1—3, postero-lateral angles forming a small tooth. Eyes 
—  — indicated by a clear almost circular space on the top of the head. Antenna 1, 
Er 1° joint large, distally expanded, longer than 24 and 34 combined (supposed 
E appendage to joint 2 not existing), flagellum with about 28 joints, 1°° much the 
longest, setose. Antenna 2, ultimate joint of pedunele longer than penultimate, 
both setulose on upper margin, flagellum slender, about 28-jointed. Maxilla 1, 
outer plate represented with 6 strong spines, 24 joint of palp with 5 spine-teeth. 
E Maxilla 2, inner plate fringed on inner margin. Gnathopod 1, 5t% joint rather 
more (in fig. much more) than half 6!", 6!" narrow, tapering to base of finger, 
which is half as long. Gnathopod 2 similar, but hind margin of 5t and 
‚6 joints densely setose, the longest setae at the distal ends. Peraeopods 1 
and 2, 4 joint obcordate, 5" broadly oval, 6% as long but-much narrower, all 
the 3 fringed with setae, finger °/, as long as 6" joint. Peraeopods 3—5 
successively longer, 24 joint shorter than 4. TUropod 1, peduncle as long 
as the narrow, spinose, equal rami; uropod 2 shorter than uropod 1; uropod 3, 
inner ramus coarsely serrate on inner margin and ending in a short strong 
spine. Telson longer than peduncle of uropod 3. L. 7 mm. 


Bay of Biscay (Isle de Yeu). Depth 31-58 m. 


‚2. Gen. Pardalisca Kroyer 


1842 Pardalisca (Sp. un.: P. cuspidata), Kroyer in: Naturh. Tidsskr., v.4 p.153 | 
1888 P., T. Stebbing in: Rep. Voy. Challenger, v.29 p.991 | 1893 P., G.O.Sars, Crust. 
Norway, v.1 p.402 | 1893 P. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.691. 


2 Body nearly eylindrie, back broadly vaulted. Head with small rostrum, 
— lateral margins strongly curved. Side-plates 1—4 not deep, quadrate, 5! 
with front lobe nearly as deep as side-plate 4, 6!" and 7tk small. Eyes 
imperfectly developed, when present, near lateral margins of head. Antenna 1 
the shorter, peduncle short, in S 1° joint of flagellum large, bearded, and 
15° joint of accessory flagellum large, laminar. Upper lip lamellar, very 
unsymmetrically bilobed. Lower lip with inner lobes, outer wide apart, 
mandibular processes elongate. Mandible (Fig. 56, 58) strong, left with 


TEN 


222 Pardalisca \ 


broad denticulate eutting edge and accessory plate, spine-row of 2 spines, 
palp densely setose; right with eutting edge of 4 strong teeth, no accessory 
plate, 2 spines in spine-row. Maxilla 1, inner plate small, with 1 seta, 
outer with 7(8?)—10 spines, 1 setiform, the rest smooth or with 1 tooth 
near the base, 24 joint of palp distally greatly expanded, with many spine- 
teeth. Maxilla 2, inner plate rather the broader, both slender. Maxillipeds 
(Fig. 59), inner plates rudimentary, outer broad, densely fringed, springing 
from a large base, finger of palp small. Gnathopods 1 and 2 (Fig. 57) not 
large, simple, 5! joint subfusiform, long, 6t% small, spinose, finger beset 
with spines or spinules. Peraeopods 1 and 2, 4 and 5th joints laminar, spinose, 
5th the longer. Peraeopods 3—5 long, finger short. Uropods 1 and 2 spinose, 
rami subequal, uropod 3 projeeting, rami subequal, foliaceous. Telson deeply 
cleft, armed with marginal spines, apices divergent. | 


4 species. 


Synopsis of species: 


Gnathopods 1 and 2, finger unguiform . .....- 1. P. abyssi . . . p. 222 
Gnathopods 1 and 2, finger laminar — 2. 
j Gnathopods 1 and 2, finger narrowly laminar ..... 2. P.tenuipes . . p.223 


2 \ Gnathopods 1 and 2, finger broadly laminar — 8. 


Maxilla 1, outer plate with 6 (or 7) dentate spines 2 
3 | RR RT IE a Be ER 3. P. euspidata . p.223 
Maxilla 1, outer plate with 9 dentate spines and a seta 4. P. marionis . . p. 224 


1. P. abyssi Boeck 1871 P. a. A. Boeck in: Forh. Selsk. Christian., 1870 
p. 152 | 1888 P. a.,.T. Stebbing in: Rep. Voy. Challenger, v.29 p.992 t.93 | 1893 P. a., 
G. O. Sars, Crust. Norway, v. 1 p.406 t.143 £.1 | 1893 P. a. (part.), A. Della Valle in: 
F. Fl. Neapel, v. 20 p. 692 t. 59 f.95 | 1874 P. cuspidata (err., non Kroyer 1842!), 
Buchholz in: Zweite D. Nordpolarf., v.2 p. 306 Crust. t.1 f.3; t.2 £.1. 


Bodyrather slender, pleonsegments3and4 with 2 dorsal teeth, 5? with 1such 
tooth. Head, rostrum very small. Pleon segments 1—3, postero-lateral corners 
minutely acute, or in segment 3 quadrate or slightly rounded. Eyes large, sigmoid, 
expanded below, near front lateral 
margin ofhead, lightred. Antennalin 
9, 1° joint as longas 24 and 34 com- 
bined, flagellum more than twice as 

long as peduncle, with 
40—50 short joints, 
accessory flagellum 5- 
or 6-jointed. Antenna 2 
considerably longer, 
ultimate joint of pe- 
duncle rather shorter 
than penultimate, ıfla- 


24 joint 5'h joint sth joint 


=. 


gellum longer than ..... branchial 
Fig. 56. ed ® vesicle 
P. abyssi. p x uncle, about r 40 Fig. 57. P.abyssi. 
Mandible. Jointed. Antennalind, Gnathopod 2. 


1° joint of accessory 
flagellum very large, laminar, more than twice as long as 4 small remaining joints 
combined. Maxilla 1, outer plate with 7 simplespinesand a seta, broad apex of palp 
with 20 smallspine-teeth. Maxilla 2, inner plateratherlongerandbroader than outer. 
Maxillipeds, outer plates comparatively smaller than in P. cuspidata (p. 223), palp 
more slender, 24 joint very narrow. Gmathopod 1, 5t" joint twice as broad, not 


Pardalisca 223 
twice as long as 6%, fringed with long spines, 6% joint narrow, fringed with 
 pectinate spines, finger a little shorter, curved, slender, hind margin fringed with 
spinules. Gnathopod 2 (Fig. 57) similar, but 5% joint longer, more fusiform, 
more than twice as long as 6%. Peraeopods 1 and 2 rather densely spinose, 
94 joint expanded distally, 5!" narrowly oval, longer than 4!" or linear 6, 
- finger less than half 6. Peraeopods 3—5, 24 joint narrow oblong, 4%, 5th 
and 6! joints long and narrow, finger short and straight, with short curved nail. 
Uropod 3, rami broadly foliaceous, subequal, or outer rather longer than inner, 
scarcely acute. Telson not twice as long as broad, 4 spinules along each 
margin, celeft nearly °/, length, notched apices a little divergent. Colour 
semipellueid, dorsally tinted with orange, ova rose-coloured. L. reaching 
28 mm. 

Arctie Ocean, North-Atlantie and North-Sea (Greenland, Spitzbergen, Nova Scotia, 
Norway). Depth 56—282 m. 


2, P. tenuipes O.Sars 1893 P.t., G. O. Sars, Crust. Norway, v.1l p.404 
142 5.2; 


Body not very slender, pleon segment 3 with 2 dorsal prominences, rounded, 
short, segment 4 with 2 small dorsal teeth, 5!" with 1 rather larger tooth. Head, 
rostrum rather more produced than in P.cuspidata. Pleon segment 3, postero- 
lateral corners acute angled, not forming a tooth. Eyes rather small, sublinear, 
' chalky white. Antenna 1 in O, 1° joint as long as 24 and 34 combined, flagellum 
slender, 4 times as long as pedunele, accessory flagellum 6-jointed. Antenna 2 
_ eonsiderably longer, ultimate and penultimate joints of peduncle subequal, 
 flagellum 1'/, length of pedunele. Antennae 1 and 2 in CS longer, antenna. 1 as 
 _ usual having 1° joint of flagellum very large, densely fringed; accessory flagellum 
large, with 3 joints, 1° representing 4 coalesced into a large flattened ‚joint. 
— Gnathopods 1 and 2 as in P. cuspidata, except that the finger is more narrowly 
 laminar, and has the terminal spine much stronger than the others. Peraeo- 
pods 1 and 2 nearly as in P. cuspidata, but peraeopods 3—5 more slender, 
more densely setose, 6!" joint very narrow, finger small, narrow, awl-shaped. 
 Uropod 3, rami less broad, rather blunt, outer rather longer than inner. 
Telson nearly twice as long as broad, with a group of 3 spinules on each 
side near the base, and one near the apex, cleft more than °/, length, 
dehiscent all along, apices bidentate. Colour semipellucid, yellowish grey; 
ova orange-coloured. L. © scarcely attaining 11 mm. 
North-Atlantie (Norway). Depth 94—188 m. 


= 3. P. cuspidata Kreyer 1842 P.c., Kroyer in: Naturh. Tidsskr., v.4 p.153 | 

1876 P.c., A. Boeck, Skand. Arkt. Amphip., v.2 p.482 t.12 f.5, except 5g | 1893 P. c., 

—.@. 0. Sars, Crust. Norway, v.1 p.403 t. 141, 142 f.1 | 1893 P. c. (part.), A. Della Valle 
in: F. Fl. Neapel, 0.20 p.692 t.59 f. 92. 


Body rather slender, eylindrie, smooth, back broadly rounded, pleon 
segments 3 and 4 with 2 dorsal teeth, 5!" with 1 such tooth. Head, rostrum 
very small. Pleon segment 3, postero-lateral eorners sharply quadrate. Eyes 
very narrow, slightly sigmoid, along front lateral margins of head, bright 
red. Antenna 1 in O, 1° joint as long as 24 and 39 combined, flagellum 
more than thrice as long as peduncle, with many short joints, accessory 
flagellum with 5 joints, 1° nearly as long as the other 4 combined. Antenna 2 
considerably longer, ultimate and penultimate joints of peduncle subequal, long, 

*  flagellum rather longer than peduncle. Antenna 1 in J, 1° joint of flagellum 
very large, clothed with transverse rows of sensory setae, 1° joint of accessory 
flagellum laminar, more than twice as long as the other 4 combined. Maxillal, 


gr. Pardalisca, Pardaliscoides 


outer plate with 6(7?) dentate spines and a seta, broad apex of palp with 
many spinules. Maxilla 2, inner plate rather longer and broader than outer. 
Maxillipeds, 24 joint of palp stout, not much longer than 34, Gmathopod 1, 
5th joint subfusiform, densely spinose, much broader than 6!" and fully twice 
as long, 6!" narrow, fringed with pectinate spines, ‚finger laminar, broadly 
oval, armed on apex and along hind margin with spines, one rather larger 
than the rest serving as a nail. Gnathopod 2 similar, but longer, especially 
in 24 and 5t" joints. Peraeopods 1—5 as in P. abyssi (p. 222). Uropod 3, 
rami equal, broadiy foliaceous, spinules on outer, plumose setae on inner 
margin. Telson 1'/, times as long as broad, margins with 3 separate spinules, 
and a group of 3, cleft °/, length, dehiscent, apices rather broadly notched. 
Colour orange, darkest on back; ova rose-coloured. L. 12 mm. 


Arctie Ocean, North-Atlantie and Skagerrak (Greenland, Spitzbergen, Matotschkin 
Schar, Norway southward to Bergen, Bohuslän). Depth 18—72 m. 


4. P. marionis Stebb. 1888 P. m., T. Stebbing in: Rep. Voy. Challenger, 2.29 
p. 996 t. 94 | 1893 P. cuspidata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 692. 


Rostrum very small. Eyes not observed. Antennal, 1° joint longer than 24 

and 34 combined, flagellum longer than peduncle, 18 joints remaining, accessory 
Palp flagellum with 5 joints, 1° longest, as long as 1% of 
primary. Antenna 2, ultimate joint of peduncle a little 
shorter than penultimate, flagellum not much longer than 
pedunele, 29-jointed. Mouth-parts nearly as in P. cuspi- 
data (p. 223), but mandibular palp (Fig. 58) rather shorter; 
maxilla 1, outer plate with 9 dentate spines and a seta, 
Fig. 58. Mandible.  proad apex of palp with 15 little distant spine-teeth; 
maxilla 2, inner plate broader but rather shorter than 
outer; maxillipeds (Fig. 59) broader, 24 joint. of palp 
little longer than 1°. Gnathopods 1 and 2 nearly as 
in P. euspidata, but 24 joint shorter, 5tk much more 
than twice as long and broad as 6%, finger not much 
longer than broad, beset with 14 unequal spines and 
having a spine-like nail as long as itself. Peraeopods 1 
and 2, 4% joint not much shorter than the oval 5th, 
finger fusiform, more than half as long as 6" joint, 
with a very small curved nail. Peraeopod 4, 24 joint 
Fig. 50. Maxilliped. moderately expanded, oblong, 4, 5th and 6 joints 
Fig.ösandse. narrow, long. All the pleon and some of the peraeopods 
P. marionis. missing. L. (from rostrum to end of peraeon) about 4mm. 


Southern Indian Ocean (Marion Island). Depth 183 m. 


3. Gen. Pardaliscoides Stebb. 


1888 Pardaliscoides (Sp. un.: P. tenellus), T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1725 | 1897 P., T. Stebbing in: Tr. Linn. Soe. London, ser.2 2.7 p.38 | 1893 
Pardalisca (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 691. 


Antenna 1 the longer; pedunele long, primary and accessory fingelle 
many-jointed. Mandible, left with 4 unequal teeth on eutting edge, "erenulate 
accessory plate and 2 spines; right with 3 teeth on ceutting edge, no accessory 
plate, 3 spines; palp slender, fringed with setiform spines. Maxilla 1, inner 
plate small, with 1 seta, outer with 7 spines, 1 setiform, 24 joint of palp 
wide, carrying many spinules.. Maxilla 2, inner plate with 3 setae, outer 


Pardaliscoides, Nieippe 225 


with 6, both slender. Maxillipeds, inner plates very small, outer on small 
base, short, narrow, spinulose; 2" and 3° joints of palp long, finger long, 
with setules on inner margin. Gmnathopods 1 and 2 similar, simple, 5tk joint 
robust, fusiform, 6% slender, finger fringed with setules. Peraeopods 1—5 
slender, long. Uropod 2, rami unequal; uropod 3, rami foliaceous. Telson 
deeply cleft. 


1 species. 


1. P. tenellus Stebb. 1888 P.t., T. Stebbing in: Rep. Voy. Challenger, v.29 
p- 1725 | 1897 P. t., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.38 t.12 | 1893 
 Pardalisca abyssi (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 692. 


Pleon segments 1—3 perhaps with dorsal denticle. Head, rostrum acute. 
Antenna 1, 1° joint stout, 24 longer, 34 half as long as 24, flagellum with 
_ more than 13 joints, 18% much the longest, accessory flagellum with more than 
- 7 joints, 1% as long as 1° of primary. Antenna 2, ultimate and penultimate joints 
 ofpeduncle long, ultimatethe shorter, flagellum halfas long as peduncle, 12-jointed. 
 Gmnathopods 1 and 2 spinose; short plumose spines on hind margin of 5th and 

6 joints, beginning at narrowed distal end of 5th, Setules on finger’s 
inner margin very small. Peraeopods 1 and 2, 5" joint longer than 4th or 6tb; 
peraeopod 2 rather longer than peraeopod 1, and having about a dozen blunt 
spines on hind margin of 6'% joint. -Peraeopod 3, 24 joint very slightly 
 expanded, 4th the longest, finger slender, acute. Peraeopod 4 like 34, but 
joints rather longer. Peraeopod 5 considerably longer than 4, 24 joint 
expanded above, narrowing downward, 4 joint very long. Branchial vesiele 
of this limb small, narrowly oval. Telson much longer than broad, cleft 
>/, length, dehiscent, with a spinule at each apex and a setule on each 
lateral margin. L. 8 mm. 


South-Paeifie (lat. 37° S., long. 83° W.). Depth 3246 m. 


4. Gen. Nicippe Bruz. 


ee: EL 1859 Nicippe (Sp. un.: N. tumida), R.-M. Bruzelius in: Svenska Ak. Handl,, 
n.ser.v.3 nr.] p.99 | 1893 N., G. O. Sars, Crust. Norway, v.1 p.409 | 1893 N. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 657. 


Head with very small rostral projection, lateral corners produced. 
- Side-plates very shallow, not overlapping, 4" not emarginate, 5tk with front 
lobe the deeper. Antenna 1 in Q much longer than antenna 2, accessory 
flagellum small. Antenna 1 in JS rather shorter than antenna 2, 1° joint of 
fagellum long, bearded, 1° joint of accessory flagellum long, laminar. Upper 
lip moderately bilobed. Lower lip, outer lobes small, separated by a single 
inner lobe. Mandible, eutting edge broad, dentate, accessory plate broad, 
only present on left mandible, spine-row with small spines, 39 joint of palp 
not much shorter than 24. Maxilla 1, inner plate with 1 seta, outer with 
8(?) spines, palp with 9 spine-teeth on expanded apex. Maxilla 2, inner 
plate a little shorter than outer, both slender. Maxillipeds, inner plates 
conical, small but not rudimentary, outer fringed with spines, narrow, not 
‚reaching end of palp’s 1° joint, palp very large, 24 joint long, oval, 3% not 
much shorter, finger spinulose on inner margin. Gnathopods 1 and 2, 5th joint 
rather short, distal expansion densely setose, 6% long oval, finger long, 
curved, acute. Peraeopods 1 and 2, 4!" and 5tk joints equal, slightly widened, 

6'% rather longer. Peraeopods 3—5 successively longer, slender, 24 joint 
- oblong, little expanded, finger stiliform. Uropods 1 and 2 strong, spinose, outer 


Das Tierreich. 21. Lief.: T.R.R. Stebbing, Amphipoda I. ED 


226 Nieippe, Synopioides 


ramus little shorter than inner; uropod 3 reaching beyond the others, rami 
subequal, setose on inner margin. Telson narrow, deeply cleft. 

1 species. 

1. N. tumida Bruz. 1859 N.t., R.M. Bruzelius in: Svenska Ak. Handl,, n. ser. 
v.3 nr.1 p.99 t.4 f.19 | 1868 N. t., A. M. Norman in: Ann. nat. Hist., ser. 4 v.2 p.414 
t.21 £.4—6 | 1876 N. t., A. Boeck, Skand. Arkt. Amphip., &.2 p.492 | 1893 N. t., 
G. ©. Sars, Crust. Norway, v.1 p.410 t.144; t. 145 £.1 | 1893 N. t., A. Della Valle in: 
F. Fl. Neapel, v.20 p. 658 t. 59 f. 66, 67. 

Back broadly vaulted, subdepressed, pleon segment 4 with 2 contiguous 
very small dorsal teeth. Head, lateral eorners angularly produced, their 
lower margins continued backward as lateral projecting ridge. Side-plate 1 
larger than any of the 3 following. Pleon segment 3, postero-lateral corners 
quadrate. Eyes represented by yellowish pigment near lateral margins 
of head. Antenna 1 in © long, slender, 1° joint as long as 24 and 
34 combined, flagellum neariy 4 times as long as peduncle, 48-jointed, accessory 
flagellum with 3 or 4 joints, 1° as long as others combined. Antenna 2 in Q, 
ultimate and penultimate joints of peduncle equal, flagellum as long as 
peduncle, 18-jointed. Antenna 2 in d, flagellum long, filiform. Gnatho- 
pod 1, 6% joint very large and tumid, palm not defined, but subchelate by 
help of the long clasping finger. Gnathopod 2 like gnathopod 1, except that 
the distal expansion of 5 joint is: somewhat more prominent and very 
densely spinose. Peraeopod 5 very elongate, 24 joint behind submarginally 
armed with 2 (Bruzelius; 1 Norman; not noticed by Boeck and Sars) long 
strong setae, plumose on the distal half. Uropod 3 large, peduncle thick, 
setose on outer margin, rami oblong lanceolate, inner margin fringed with 
long setae, outer a little the longer. Telson nearly 3 times as long as 
broad, cleft nearly to the base, the division dehiscent more at the 2 extremities 
than in the middle, apices bidentate. Colour a tinged yellowish 
orange. L. © 14mm, | rather less. 

Arctic Ocean, North-Atlantie, North-Sea and Eck (Norway, Shetland Isles, 
Sound of Skye). Depth 113—565 m. 


5. Gen. Synopioides Stebb. 

1888 Synopioides, T. Stebbing in: Rep. Voy. Challenger, v.29 p.999 | 1893 $., 
A. Della Valle in: F. Fl. Neapel, ©.20 p.851. . 

Side-plates very shallow. Antenna 1, peduncle 
short, flagellum long, accessory flagellum rather 
long. Antenna 2 longer than antenna 1. Mandible 
(Fig. 60), cutting edge broad, denticulate, accessory 
plate on both mandibles, spine-row of 2 spines, palp 
very long, 39 joint linear, much shorter than 24, 
Maxilla 1, outer plate with 8 long spines, palp 
with 7 spine-teeth on distally widened 24 joint. 
Maxilla 2, inner plate fringed on inner margin, 
rather shorter than outer. Maxillipeds, inner plates 
small, conical, setiferous, outer small on a large 
base, with few fringing spines, palp long. Gnatho- 
pods l and 2 simple, 5!" and 6" joints long, narrow. 


Fig. 60. 8. macronyx. . : 
Mandibles and hing 3 Peraeopods 1 and 2 as in Pardalisca (p. 221), but 


rather more slender. Peraeopods 3—5 elongate, 
finger stiliform. Uropod 1, rami equal; uropod 2, outer ramus much the 
shorter; uropod 3, rami subequal, foliaceous. Telson deeply cleft. 
1 species accepted, 1 doubtful. 


a 
E 
B; 


Synopioides, Pardaliscella 227 


1. S. macronyx Stebb. 1888 S. m., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p. 1000, 1223 t. 94a | 1893 S. m., A. Della Valle in: F. Fl. Neapel, v.20 p.852. 


Head apparently angled in front as in Synopia scheeleana (p.272). Side- 
plates 5 and 6 broader than the preceding. Pleon segments 1—3, postero- 
lateral angles acute, chiefly in segment 3. Eyes not perceived. Antenna 1, 
1° joint short, as long as 24 and 34 combined, flagellum in © 5 times 
as long as peduncle, with 33 joints, 18 very long, first 6 or 7 very stout, 
then tapering, terminal 20 slender, the proximal joints armed with slender 


E spines and a large brush of long broad sensory filaments, accessory flagellum 


with 3 joints, together as long as the first 8 of primary. Antenna 2 longer, 
ultimate joint of peduncle elongate, shorter than the spinose penultimate, 


 flagellum longer than peduncle, with about 30 unequal joints. Triturating lobes 


of stomach of peculiar character. Gmathopod 1, 5tk joint considerably shorter 
than the long, narrow, slightly curved 6, finger about half 6%, setulose, 
with tooth at base of the nail. Gnathopod 2, 5!" joint rather stouter and longer 


Be than the tapering 6", both densely furnished with setiform spines, some on the 


5th of great length, finger more than '/, as long as 6", nearly as in gnathopod 1. 
Peraeopods 1 and 2 spinose. Peraeopod 3, 24 joint oblong, not very wide, 


6% joint straight, slender, finger needle-like. Peraeopod 5, 24 joint piriform, 


very broad at the top. Uropods 1 and 2, pedunele and rami very spinose, in 
uropod 1 peduncle subequal to the rami, in uropod 2 peduncle as long as the 
shorter ramus, inner rather longer than rami of uropod 1. Uropod 3, pedunele 
much shorter than the broad lanceolate rami, which are setose on inner margin, 
outer the longer by the extent of its small 24 joint. Telson about once and 
a half as long as broad, cleft nearly to base, apices acute, bidentate, the inner 
points rather divergent, the outer considerably produced. L. 10 mm. 


South-Pacifie (lat. 38° S., long. 94° W.). Depth 2743 m. 


S.secundus Stebb. 1888 S.s., T. Stebbing in: Rep. Voy. Challenger, v.29 p.1224. 
Perhaps the & of $S. macronyx. L. 12 mm. 
South-Pacifie (lat. 39% S., long. 105° W.). Depth 3703 m. 


6. Gen. Pardaliscella 0. Sars 
1893 Pardaliscella (Sp. un.: P. boeckii), G&. ©. Sars, Crust. Norway, v.1 p. 407. 
Body slender, eylindrie, without dorsal processes. Head not rostrate. 


Side-plates as in Pardalisca (p. 221). Antennae 1 and 2 in O short, subequal, 


accessory flagellum small. Lower lip, outer lobes small, separated by a 
single inner lobe. Mandible not very strong; as to cutting edge, accessory 
plate and spine-row similar to those of Pardalisca, but weaker, palp slender, 
almost naked except at apex. Maxilla 1, inner plate with 1 seta, outer 
with 6 spines, 2 very stout, apex of palp moderately expanded. Maxilla 2 
with few setae, inner plate a little shorter and wider than outer. Maxillipeds, 
inner plates conical, rather, not very, small, outer moderately broad, not 
reaching end of palp’s 1° joint, palp of moderate size. Gnathopods 1 and 2 
stronger than in Pardalisca, 5% joint wider, scarcely longer than 6%, which 
narrows distally, finger simple, unguiform. . Peraeopods 1—5 nearly as in 
Pardalisca. Uropods 1 and 2, rami nearly equal, with few spinules; uropod 3, 
rami equal in length, quite naked, outer the narrower, with small 24 joint. 
Telson unarmed, deeply_cleft. 


2 species, 
15* 


ee SE 
a ee 


298 Pardaliscella, Halice 


Synopsis of species: 


Pleon segment 3, postero-lateral eorners slightly rounded . . 1. P, boeckii . p. 228 
Pleon segment 3, postero-lateral corners strongly rounded . . 2. P.axeli . . p.228 


1. P.boeckii (Malm) 1871 Pardalisca b., A. W. Malm in: Öfv. Ak. Förh., 0.27 p.547 
t.5 £.2 | 1893 Pardaliscella b., G. O. Sars, Crust. Norway, v.1 p.408 t.143 f.2 | 1893 
Pardalisca abyssi (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 692. 


Peraeon long. Head, lateral corners slightly projeeting, evenly rounded. 
Side-plate 1, front corner acute, 5" in front as deep as 4{h, Pleon segment 3, 
postero-lateral corners evenly rounded, little prominent. Eyes inconspicuous 
in speeimens in spirit. Antenna 1 inQ, 1° joint longer than 24 and 34 combined, 
flagellum rather longer than pedunele, about 12-jointed, accessory flagellum small, 
2- or 3-jointed. Antenna 2 scarcely longer, ultimate joint of peduncle subequal to 
penultimate, flagellum subequal to the 2 combined. Gnathopods 1 and 2, 5% joint 
not longer than 6°, finger with small dentiele at middle of concave margin. 
Peraeopods 1 and 2 less setose than in Pardalisca (p.221). Peraeopod 3, 24 joint 
rather narrow, 6! linear, finger as long as 6%, Peraeopod 5, 24 joint more 
widened, finger not so long as 6. Uropods 1 and 2, rami lanceolate, each 
with a single spinule at about middle of each margin. Telson not quite 
twice as long as broad, distally tapering rapidly to acute apices, cleft rather 
beyond middle. L. (a presumably young specimen) 2:5 mm (Malm), © adult, 
scarcely exceeding 4 mm (Sars). 


Skagerrak (Bohuslän), Christianiafjord. Depth 188 m. 


2. P. axeli Stebb.*) 1871 Pardalisca boeckii (err., non Malm 1871!), A. Boeck 
in: Forh. Selsk. Christian., 1870 p. 152 | 1876 P.b., A. Boeck, Skand. Arkt. Amphip., 
v.2 p.485 t.10 f.4. 


Differing from P. boeckii by following characters. Side-plate 1, front 
corners rounded (in fig.) Pleon segment 3, postero-lateral corners broadly 
rounded and (in fig.) strongly outdrawn. Antenna 1, flagellum longer than 
peduncle, 16-jointed, accessory flagellum 2-jointed. Antenna 2 shorter, ultimate 
joint of peduncle shorter than penultimate, flagellum shorter than peduncle, 
10—12-jointed. Gnathopods 1 and 2, 5tk joint a little longer than 6th, Telson 
lanceolate, cleft to the base. L. 8—10 mm. 


Christianiafjord, North-Sea (Karmöe). 


7. Gen. Halice Boeck 


1871 Halice, A. Boeck in: Forh. Selsk. Christian., 1870 p. 152 | 1893 H., G. 0. 
Sars, Crust. Norway, v.1 p.411 | 1895 H., A. Della Valle in: F. Fl. Neapel, v.20 p. 661. 


Head, rostrum small but distinet. Side-plates very shallow. Eyes 
wanting. Antennae 1 and 2 slender, much stronger in d. Antenna 1 the 
shorter. Mandible, eutting edge moderately wide, a small accessory plate 
on both mandibles, palp not very large, 34 joint very short. Maxilla 1, 
inner plate with 1 seta, outer with 6(?) spines, 24 joint of palp not distally 
expanded. . Maxilla 2 comparatively large. Maxillipeds, inner plates almost 
obsolete, outer as long as their base, overtopping 1° joint of palp, fringed 
with a few spines, palp not very large. Gmathopods 1 and 2 not very powerful, 
simple. Peraeopods 1 and 2 as in Pardalisca (p. 221). Peraeopods 3—5 long, 
slender, 24 joint rather narrow, finger stiliform. Uropod 3, rami extended 


*) Sp.nov. After Axel Boeck. 


Halice, Liljeborgiidae 229 


< considerably beyond the others, subfoliaceous, inner margin setose, outer 


ramus with small 24 joint. Telson narrow, unarmed, deeply cleft. 


1 species. 


1. H. abyssi Boeck 1871 H.a.-+- H. grandicornis ($), A. Boeck in: Forh. 


Selsk. Christian., 1870 p.152, 153 | 1876 H. a., A. Boeck, Skand. Arkt. Amphip., v.2 


p-488 t.10 f.2 | 1893 H.a., G.O. Sars, Crust. Norway, v.1 p.412 t.145 f.2 | 1893 H. a., 
A. Della Valle in: F. Fl. Neapel, v.20 p. 661 t.59 f. 69—71. 


Body moderately slender, peraeon in O much longer than in JS, pleon 
segments +and 5 produced to a dorsal acute subdeflexed tooth, larger in segment 5. 
Head, rostrum nearly reaching middle of 1° joint of antenna 1, lateral corners 
somewhat produced, narrowly rounded. Side-plate 1, front corners acutely 


- produced, 5t" more than twice as broad as deep, front lobe scarcely produced. 


Pleon segment 3, postero-lateral corners subquadrate. Eyes not represented 
by any trace of pigment. Antenna 1 in Q, 1° joint nearly twice as long as 
22 and 34 combined, flagellum scarcely thrice as long as pedunele, 1° joint as 
long as the next 8 combined; accessory flagellum nearly as long as peduncle, 
with 3 joints, 1% much the longest. Antenna 2 little longer, ultimate joint of 
pedunele shorter than penultimate, flagellum subequal to the peduncle. In CS 
antennae 1 and 2 nearly twice as long as in O9. Antenna 1, 1° joint 
of flagellum extremely large, dense with sensory setae, about as long as 
laminar accessory flagellum. Gnathopods 1 and 2, 5t" joint little expanded 
distally, densely setose, 6! joint much longer, rather narrow, hind margin 
densely setose, finger slender, smooth, a little curved. Peraeopods 1 and 2 
scarcely longer than gnathopod 2, 4 joint rather shorter than 5th, Peraeo- 
pods 3—5 long, slender; in peraeopod 3, 24 joint rather small and narrow, 


‚in 4 and 5tk successively larger, 4th joint considerably longer than 5tk or 


6th, finger short. Uropod 3, outer ramus rather longer than inner. Telson 
more than twice as long as broad, tapering, cleft nearly to base, apices 
bidentate. Colour pellueid with faint yellowish tinge. L. © 8, d 9 mm. 


Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (whole Norway). Depth 
188—752 m. 


18. Fam. Liljeborgiidae 
1899 Liljeborgüidae, T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p.211. 


Pleon with one or more of the segments dorsally dentate. Head, 
rostrum seldom large. Side-plate 1 produced forward, 4!" emarginate behind. 
Antenna 1 usually shorter than antenna 2, accessory flagellum well developed. 
Upper lip slightly or not bilobed. Lower lip without-inner lobes. Mandible, 
molar feeble. Maxillipeds, inner and outer plates rather small, palp elongate, 
Gnathopods 1 and 2 strong, subchelate, gnathopod 2 the larger, often with sexual 
variation. Peraeopods 1 and 2 very slender. Peraeopods 3--5, 24 joint expanded, 
5th pair the longest. Uropod 3, rami subequal in length. Telson cleft. 


Marine. 
2 genera, 10 accepted species and 2 doubtful. 


Synopsis of genera: 


Gnathopods 1 and 2, 5th joint produced into a narrow lobe 1. Gen. Liljeborgia p. 230 
Gnathopods 1 and 2, 5th joint little or not at all produced 2. Gen. Idunella . p. 234 


N a ee 
F = + 


230 Liljeborgia 


1. Gen. Liljeborgia Bate 


1861 Iduna (non Keyserling & H. Blasius 1840, Aves!), A, Boeck in: Forh. 
Skand. Naturf., Mode 8 p.656 | 1862 Liljeborgia (part.). Bate (& Westwood), Brit. sess. 
Crust., v.1 p.202 | 1862 L., Bate, Cat. Amphip. Brit. Mus, p.118 | 1876 L., A. Boeck, 
Skand. Arkt. Amphip., v.2 p.496 | 1888 L., T. Stebbing in: Rep. Voy. Challenger, v.29 
p- 980 | 1871 Lilljeborgia, A. Boeck in: Forh. Selsk. Christian., 1870 p.154 | 1894 L., 
G. ©. Sars, Orust. Norway, v.1 p.529 | 1865 Microplax (non Fieber 1861, Hemiptera!), 
W. Lilljeborg in: N. Acta Soe. Upsal., ser.3 v.6 nr.1 p.19. 


Pleon segment 4 dorsally dentate. Antenna 1 the shorter, accessory 
flagellum strongly developed. Mandible, cutting edge dentate, accessory 
plate on- both mandibles, spines of spine-row short, palp slender, with less 
difference in length than usual between the joints. Maxilla 1, inner plate 
small, with 1 or 2 setae, outer plate with 10 spines, palp large. Maxilla 2, 
inner plate the wider. Maxillipeds, outer plates narrow, reaching little beyond 
1° joint of elongate palp. Gnathopods 1 and 2, 5 joint produced into a 
considerable lobe, 6% joint large, oval, finger long, more or less serrate 
on inner margin. Uropod 3, rami 1-jointed. 

8 species accepted, 2 doubtf£ul. | 


Synopsis of accepted species: 


Pleon segments 1 and 2 each with a single dorsal 
tooth — 2. 

Pleon segments 1 and 2 each with. more than 1 
dorsal tooth — 6. 


Pleon segment 3 without dorsal tooth; telson celeft 
nearly to base — 3. 
Pleon segment 3 with dorsal tooth; telson not 
cleft nearly to base — 5. 
J 


1 
2 
Pleon segment 3, postero-lateral angles upturned 1. L. pallida . . . . p.250 


® Pleon segment 5, postero-lateral angles not upturned —4. 


Eyes eonspieuous; peraeopods 4 and 5, finger less 

than half as long as 6th joint . ...... 2. L. brevicornis . . p. 251 
Eyes ineonspieuous; peraeopods 4 and 5, finger 

more than half as long as 6th joint ...... 3. I. maceronyx. . . p.231 


4 


Peraeopods 3—5, 24 joint narrowly oblong. . . 4. L. fissicornis - . p.231 


\ \ Peraeopods 3—5, 24 joint broadly ovate. . . . 5. L. consanguinea . p.232 


f Pleon segments 1 and 2 quinquedentate .... 6.L. dubla. 0% p- 233 
\ Pleon segments 1 and 2 tridentate — 7. 


Pleon segment 3 not dentate, segment 4 unidentate 7. L. kinahani . . . p.233 
Pleon segment 3 unidentate, segment 4 bidentate 8. L. dellavallei . . p.234 


1. L. pallida (Bate) 1856 Gammarus? pallidus (nom. nud.), Bate in: Rep. 
Brit. Ass., Meet.25 p.55 | 1857 @.?p., Bate in: Ann. nat. Hist., ser.2 v.19 p.145 | 1862 
Liljeborgia pallida (part.), Bate & Westwood, Brit. sess. Crust., v. 1 p. 203 f. | 1862 L.p., 
Bate, Cat. Amphip. Brit. Mus., p. 118 t.20 £. 5. 


In many respects agreeing with L. brevicornis; but: Pleon segment 3, 
postero-lateral angles acutely toothed, with a distinet sinus above the upturned 
point. Antenna 2, flagellum shorter than ultimate joint of pedunele (a character 
probably variable and less important). Uropod 3, rami much shorter than 
peduncle. Colour in life very white, back stained with a rich erimson 
blotch, gnathopods 1 and 2 with a rosy hue on 6% joint, and the same tint on 
parts of the peraeopods. L. 5 mm. 

Plymouth Sound; off Torquay. 


og RE Ar Se 
2 TE Dr EU Hehe ST ar 


Liljeborgia 231 


2. L. brevicornis (Bruz.) 1859 Gammarus b., R.M. Bruzelius in: Svenska 
Ak. Handl., n. ser.v.3 nr.1 p.62 t.3 f. 11a—o | 1861 @. b., Iduna (part.), A. Boeck 
in: Forh. Skand. Naturf., Mode8 p.657 | 1862 Liljeborgia pallida (part.) (err., non Gam- 
marus pallidus Bate 1857!), Bate & Westwood, Brit. sess. Crust., v.1,p.205 | 1871 
Lilljeborgia p., A. Boeck in: Forh. Selsk. Christian., 1870 p.155 | 1876 L.p., A. Boeck, 
Skand. Arkt. Amphip., v.2 p.497 t.18 f.9 | ?1889 L.p., A.M. Norman in: Ann. nat. 
Hist., ser.6 v.4 p.116 t.10 £.10 | 1894 L.p., G.O. Sars, Crust. Norway, v.1 p.580 t. 187. 


Pleon segments 1, 2 and 4 (Sars) (Bruzelius and Boeck: segments 1—5) 
each produced to a small dorsal tooth. Head, rostrum distinet but short, 
lateral corners projeeting, obliquely rounded. Side-plate 1 distally expanded, 
15 —34 with small tooth at lower hind corner. Pleon segment 3, postero-lateral 
angles acute, lateral margin straight. Eyes large, oval quadrangular, very dark. 

_ —  Antenna 1, 1° joint nearly twice as long as 2 and 34 combined, 34 very small, 
= — _flagellum nearly twice as long as peduncle, about 20-jointed, accessory pedunele 
"more than ?/, as long as primary, 13-jointed. Antenna 2 about ?/, longer, ultimate 
= joint of peduncle rather longer than penultimate, flagellum longer than ultimate 
= joint of pedunele. Gnathopod 1, 4% joint apically acute, 5" produced to a narrow 
setose lobe, 6!" large, ovate, palm curved, oblique, spinulose and setulose, 
defined from the shorter hind margin by an angle and spines, finger curved, 
with 6 strong teeth in proximal half. Gmathopod 2 similar, but larger, 
E and larger in 9 than in O, palm longer and more oblique, finger serrate 
almost throughout, with about 12 teeth. Peraeopods 1 and 2, 5* joint 
| much shorter than 6*%, finger about !/, length of 6th. Peraeopods 3—5, 24 joint 
oval, serrate behind. Peraeopod 5, 6" joint rather longer than 5%, tapering, 
with fascicles of setae on hind margin, finger about '/, as long, stiliform. 
Uropod 3, rami longer than peduncle, lanceolate, subequal in length, but 
inner much broader than outer, with 3 or 4 spinules on inner margin. 
Telson nearly twice as long as broad, cleft nearly to base, apices a little 
dehiscent, bidentate, outer point more produced than inner, a long spine in 
each notch. Colour pale orange. L. © 8, © nearly 10 mm. 

Aretie Ocean, North-Atlantic, North-Sea and Skagerrak (whole Norway, depth 
75—564 m; Bohuslän; Seotland; France). 


3. L. macronyx (0. Sars) 1894 Lilljeborgia m., G.O. Sars, Crust. Norway, 
v.1 p.588 t. 188 f.2. 


2 Body slender, pleon segments 1, 2 and 4 each produced to a small dorsal 
-  . tooth. Head, rostral projeetion well marked, lateral corners slightly produced, 
obtusely acuminate. Pleon segment 3, postero-lateral corners almost quadrate, 
produced to a very small tooth. Eyes inconspicuous in spirit. Antenna 1, flagellum 
nearly twice as long as pedunele, about 12-jointed, accessory flagellum more than 
half as long, 8-jointed. Antenna 2, ultimate and penultimate joints of peduncle 
subequal, flagellum less than both combined. Gnathopods 1 and 2 nearly as 
in L. brevicornis, but finger in gnathopod 1 with-only 3 teeth at base, 
and in gnathopod 2 with 7 on proximal half. Peraeopods 1 and 2, finger half as 
F: long as 6tk joint. Peraeopods 3—5, 2 joint large and laminar. Peraeopod 5 very 
E. long, 6% joint smooth, finger nearly as long. Uropod 3, both rami rather 
-  —  narrow, inner the wider, with 3 small spinules on inner margin. Telson 
5 very narrow, nearly thrice as long as broad, cleft nearly to base, apices 
minutely bidentate, with spinule in each notch. L. © 6 mm. 


Christianiafjord and Trondhjemsfjord. Depth 376-752 m. 


4. L. fissicornis (Sars) 1858 Gammarus f., M. Sars in: Forh. Selsk. Christian., 
p- 147 | 1861 @. f., Iduna f., A. Boeck in: Forh. Skand. Naturf.,, Mode 8 p. 657 | 


# 


232 Liljeborgia 


1871 Lilljeborgia f., A. Boeck in: Forh. Selsk. Christian., 1870 p. 155 | 1876 L. f., 
A. Boeck, Skand. Arkt. Amphip., v.2 p.499 t.18 f.10 | 1889 L. f,, A. M. Norman in: 
Ann. nat. Hist., ser.6 v.4 p.118 t.10 £.11 } 1894 L. f., G. O. Sars, Crust. Norway, v.1 
p- 534 t.189 |.1866 Gammarus pallidus (ert., non Bate 1857!), Goes in: Öfv. Ak. Förh., 
v.22 p.529 t.40 f.27 | 1893 Nieippe pallida (part.), A. Della Valle in: F, Fl. Neapel, 
v.20 p. 658, 

Body rather slender, pleon segments 1—5 each produced into a dorsal 
tooth, segments 4 and 5 carinate and the tooth on each large, especially that on 
segment 4. Head, rostrum small, lateral corners subangular. Side-plate 1 much 
expanded distally. Pleon segment 3, postero-lateral corners produced to a small 
tooth. Eyes wholly wanting. Antennal, flagellum nearly twice as long as peduncle, 
18—20-jointed, accessory flagellum more than half as long, 10—12-jointed. 
Antenna 2 longer by almost the whole flagellum. Gnathopods 1 and 2 in 9 , palm 
curved, oblique, defined by a projeeting angle and strong palmar spines, 
finger in gnathopod 1 with 4 teeth at base, in gnathopod 2 with about 9 
covering the proximal ?/, of margin. Gmnathopod 1 ind asin O, but gnatho- 
pod 2 with 6! joint very large, dilated at base, then tapering, palm long, 
straight or slightly concave, finely eiliated, finger very large, greatly curved, 
without teeth. Peraeopods 3—5, 24 joint narrowly oblong, 4! pair much 
longer than 34, and 5!" than 4%, In peraeopod 5, 6!" joint with small 
setae on both margins, finger rather short. Uropod 3, rami equal in length, 
inner the broader, with 3 spines on inner margin. Telson longer in J 
than in ©, cleft not much beyond the middle, apices contiguous at the 
inner points, the outer considerably more produced, a long spine in each 
notch. Colour uniformly yellow. L. © 10, & 11 mm, but arctie specimens 
reaching 20 mm. 

Aretie Ocean and North-Atlantic (Greenland, Spitzbergen, Trondhjemsfjord, 
Finmark); Skagerrak (Bohuslän). Depth 94-376 m. 


5. L. consanguinea Stebb. 1888 L.c., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.980 t.91 | 1893 Nieippe pallida (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.658. 

Pleon segments 1—5 carinate, each produced to a small but pronounced 
dorsal tooth. Head, rostrum small, well marked, lateral corners narrowly 
obtuse. . Side-plate 1 broadly produced forward, 1%—34 with a denticle at 
the front and hind corners, 4 with the hind margin below the excavation 
straight, serrate into 4 teeth. Pleon segments 1—3, postero-lateral corners 
acute, in segment 3 slightly upturned with small sinus above. ‚Eyes doubtful. 
Antenna 1, 24 joint fully half as long as 1%, flagellum rather longer than 
peduncle, 13-jointed, accessory flagellum more than half as long, 8- or 9-jointed. 
Antenna 2 not much longer than antenna 1, ultimate joint of peduncle rather 
longer than penultimate, flagellum shorter than both combined, 13-jointed. 
Upper lip very slightly bilobed. Mandible, accessory plate strongly dentate 
on left, feebly denticulate on right, spine-row of 6 spines, molar almost 
evanescent, represented by a row of spines, 24 joint of palp a little longer 
than 1°, 1% than 34. Maxilla 1, inner plate with 2 setae instead of 1 as in the 
European species, outer plate with 10 spines. Gnathopods 1 and 2 in go asin 
L. fissicornis (p. 231), but 4" joint of gnathopod 1 distally rounded (?). Peraeo- 
pods 3—5 distinguished from those of L. fissicornis by the broadly oval 24 joint, 
which also in peraeopod 5 has the hind margin very convex. Uropod 3, 
rami rather longer than peduncle, inner little broader and rather shorter 
than outer, with 2 spinules on the inner margin. Telson as in L. fissicornis. 
L. 9 11 mm. 


Southern Indian Ocean (Kerguelen Island, depth 36 m; Heard Island, depth 187 m). 


Liljeborgia 233 


6. L. dubia (Hasw.) 1880 Eusirus dubius, Haswell in: P. Linn. Soc. N.S.Wales, 


v.& p.331 t.20 f.3 | 1885 E. affinis, Haswell in: P. Linn. Soc. N.S.Wales, v.10 p. 101 


t.14 f. 2—4 | 1888 Liljeborgia haswelli, T. Stebbing in: Rep. Voy. Challenger, v. 29 
p-985 t.92 | 1893 Nieippe h., A. Della Valle in: F. Fl. Neapel, v.20 p. 661 t.59 f. 68. 


Pleon segments 1—5 dorsally dentate, 1% and 29 having 5 teeth each, 
34 a very minute tooth- between two rounded lobes, 4" and 5tR carinate 
each with a strong tooth; peraeon segments 6 and 7 with a dorsal tooth(?). 


Head, rostrum very distinet, narrow, acute, lateral corners broadly rounded. 


Side-plates 1—3 with very small denticles at the corners, 4" with 2 teeth on 
the hind margin. Pleon segments 2 and 3, postero-lateral eorners acute, very 
slightly produced. Eyes oval, not large, remaining dark in spirit. Antenna 1, 
15 joint fully twice as long as 24 and 34 combined, flagellum much longer than 
pedunele, 34-jointed, accessory flagellum more than half as long, 18-jointed. 
Antenna 2 considerably longer, penultimate joint of pedunele long, but shorter 
than ultimate, flagellum shorter than both combined, 24-jointed. Maxilla 1, 
inner plate with, 1 seta. Gnathopods 1 and 2 in Q nearly as in L. consanguinea, 
but 6!" joint more broadly oval. In the J gnathopod 2 has the palm of 
6 joint well defined, but rather concave than convex, the joint distally 
narrowed, with the palm produced into a blunt tooth, strong but variable 
in length, with a cavity between it and the lobe adjoining the hinge of the 
finger; inner margin of the finger somewhat convex at the middle, cut into 
teeth. Peraeopods 1-5, finger short. Peraeopods 3—5, 24 joint rather 
broad, hind margin not very convex, strongly 'serrate. Uropod 3, rami 
lanceolate, inner rather the broader and longer, with 4 spines on the inner 
margin. Telson long and narrow, cleft nearly to the base, outer point of 
bidentate apices produced much beyond the inner, a long spine in each 
notch. Colour in spirit showing a lustrous green on many parts. L. 15 mm, 


but often much smaller. 


Bass Strait and South-Paeifie (Tasmania; Port Jackson, Port Stephens and Jervis 
Bay [East-Australia]; East Moneoeur Island, depth 69 m). 


7. L. kinahani (Bate) 1862 Phaedra k., Bate (& Westwood), Brit. sess. Crust., 
e.1 p.211 f. | 1862 P.k., Bate, Cat. Amphip. Brit. Mus., p.119 t.21 f.1 | 1876 Liljeborgia k., 
A. Boeck, Skand. Arkt. Amphip., v.2 p.497 | 1888 Lilljeborgia k., Chevreux in: C.-R. Ass. 
Franc., Sess. 16 v.2 p.666 | 1894 L. k., G.O. Sars, Crust. Norway. v.1 p. 532 t.188 f. 1. 

Body very short and stout. Pleon segments 1, 2, 4 and 5 each produced 
into a well marked dorsal tooth, this in segments 1 and 2 (Sars) accompanied 
by a smaller tooth on each side. Peraeon segments 5—7 and(?) pleon 
segment 3 dorsally dentate (Bate). Head, rostrum distinct, lateral cormers 
obtusely acuminate. Side-plate 1 broader than 24 or 34, but scarcely expanded 
distally, Pleon segment 3, postero-lateral corners acute, slightly upturned, 
with very small sinus above. Eyes small, round, black. Antenna 1 short, 
flagellum not nearly twice as long as peduncle, 12-jointed, accessory flagellum 
more than half as long, 7-jointed. Antenna 2, ultimate joint of pedunele scarcely 
longer than penultimate. Gnathopod 1 as in L. brevicornis (p. 231), but 24 joint 
abruptly dilated near base, finger with only 3 teeth at base. Gmnathopod 2, 
finger with 6 teeth on proximal half. Peraeopod 5, 6" joint setose on 
outer margin, finger about half as long, very slender. Uropod 3, outer 
ramus quite unarmed, inner with a single spinule on inner margin. Telson ° 
cleft nearly to base, lobes divergent, a long spine in the notch of each 
apex, the points of the apices level. Colour whitish, pellueid (Sars), in 
front tinted with violet, behind rosy white (Chevreux). L. 3 mm. 

North-Atlantie and North-Sea (Norway, depth 11--19 m; France; Great Britain). 


ET EEE EEE IT TE ER 4 
an a REN 
’ vr £ IR Igea ch Te j , 


234 Liljeborgia, ldunella 


8. L. dellavallei Stebb.*) 1893 Nieippe pallida (part.) (err., non Gammarus 
pallidus Bate 1857!), A. Della Valle in: F. Fl. Neapel, 0.20 p.658 t.1$.1; t.19 £.35—52. 


Rather robust. Pleon segments 1 and 2 each produced into 3 dorsal teeth, 
3 and 5 each into 1 tooth, segment 4 into 2 teeth. Head, rostrum small, 
acute, slightly deflexed, lateral corners rounded. Side-plate 1 distally expanded, 
corners rounded. Pleon segments 2 and 3, postero-lateral angles acute, upturned, 
with a small sinus above. Eyes white, in Q rather small, rounded oblong, in C 
larger, irregular, approximating above. Antenna 1, 1° joint longer than 24 and 
34 combined, flagellum twice as long as peduncle, with about 20 short joints, 
accessory flagellum with more than 12 joints. Antenna 2, ultimate joint of 
pedunele longer than penultimate, rather shorter than 15-jointed flagellum. 
Gnathopod 1, finger with 7 teeth on proximal half. Gnathopod 2, 11 teeth 
covering about */, length of inner margin of finger. Peraeopods 3—5, 24 joint 
oval, broadly so in peraeopod 5, hind margin strongly serrate, finger small and 
delicate. Uropod 3, rami broadly lanceolate, little longer than peduncle, Telson 
cleft about */, of the length, each apex seemingly evenly bidentate. Colour 
variable, sometimes uniformly grey, sometimes wine-red to peraeon segment 6, 
then yellowish grey. L. 5—6 mm. 


Gulf of Naples. 
L. bispinosa (A. Costa) 1857 Gammarus bispinosus, A. Costa in: Mem. Ace. 


Napoli, v.1 p.223 t.3 f.9 | 1876 Liljeborgia b., A. Boeck, Skand. Arkt. Amphip., v.2 
p- 497 ,.?1893 Gammarus locusta- (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 660. 


L. 5 mm. 

Gulf of Naples. 

L. pugettensis (Dana) 1853 & 55 Gammarus p., J. D. Dana in: U.S. expl. 
Exp., v. 1311 p. 957; t.66 f.la—g | 1876 @. pugetensis, Cheirocratus (part.), A. Boeck, 


Skand. Arkt. Amphip:, v.2 p.395 | 1894 @. p., (©. (part.), G. O. Sars in: Crust. Norway, 
v.1 p.523 | 1893 @. locusta (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.760. 


Third joint of palp of mandible seems to be longer than in other species of 
Liljeborgia. L. 18 mm. 


Puget Sound [Western North-America]. 


2. Gen. Idunella O. Sars 


1894 Idunella (Sp. un.: I, aegvicornis), G. O. Sars, Crust. Norway, v.1 p.586 | 
1896 Idurella, Pocock in: Zool. Ree., v.32 Crust. p. 41. 

Head, rostrum not large. Accessory flagellum of antenna 1 not very 
large. Mouth-parts probably agreeing nearly with those of Liljeborgia (p. 230). 
Gnathopods 1 and 2, 5" joint not or very slightly produced. 

2 species. 

Synopsis of species: ; 

Pleon with only 1 segment dorsally dentate . ...... 1. I aequicornis . p. 234 
Pleon with 4 segments dorsally dentate .. . 2... 2. Lpicta. . . .. p.235 

1. I. aequicornis (©. Sars) 1876 Lilljeborgia aeqvicornis, G. O. Sars in: Arch. 

Naturv. Kristian., 0.2 p.255 | 1894 Idunella a., G. O. Sars, Crust. Norway, v.1 p.537 t. 190. 


Rather slender. Pleon segment 2 produced to a small dorsal tooth. Head, 
rostrum small, lateral corners narrowly rounded. Side-plate 1 much bxpanded, 


*) Sp. nov. After Antonio Della Valle. 


Idunella, Oedicerotidae 235 


broadly rounded in front, 1°°—34 with denticle at lower hind corner, 4'k large, 
quadrate, emarginate above. Pleon segment 3, postero-lateral corners acutely 
upturned, a small sinus between the point and the bulging hind margin. Eyes 
represented by small ovoid patches of whitish pigment. Antenna 1, 1° joint 
scarcely longer than 22and 34 combined, flagellum subequal to the peduncle, about 
12-jointed, accessory flagellum not half as long, slender, 5-jointed. Antenna 2 
scarcely as long as antenna 1, ultimate joint of pedunele a little shorter than 
- penultimate, flagellum shorter than the 2 combined. Mandibular palp more 
fully developed than in Liljeborgia, 34 joint long and faleiform. Maxillipeds, 
palp smaller than in Liljeborgia. Gnathopod 1 in Oo, 24 joint somewhat fusiform, 
5th very slightly produced, 6% very large, gradually widened distally, palm 
nearly transverse, slightly convex, defined by a distinet angle and 2 unequal 
spines, finger slender and curved. Gmathopod 2 in O similar, but with 6%: joint 
a little smaller. Gmathopod 1 in C very large, 6'" joint longer, than joints 
2—5 combined, palm long, concave, very oblique, defined by an acute tooth, 
the joint greatly narrowed towards tbe hinge near which the palm ends in 
a small denticle, finger long; slender, greatly curved. Gnathopod 2 in C as 
in ©, much smaller than gnathopod 1. Peraeopods 1 and 2 very slender. 
Peraeopods 3—5, 24 joint expanded, oval, peraeopod 5 the longest, its 
6% joint a little longer than 5", sparingly setose, finger rather shorter and 
thin. Uropod 3, rami subequal, inner lanceolate, outer much narrower, 2-jointed, 
22 joint spiniform. Telson about twice as long as broad, little tapering, 
cleft nearly ?/, length, inner point of bidentate apices the longer, each with 
2 spines in the notch. Colour uniformly pale yellow. L. scarcely 7 mm. 

Arctic Ocean (Varangerfjord, depth 94—188 m; Storeggen; Jan Mayen; 
Barents Sea). 


2. I. pieta (Norm.) 1889 Lilljeborgia p., A. M. Norman in: Ann. nat. Hist., 
ser.6 ©4 p.116 t. 10 £.5—9. 

Pleon segments1,2,4and 5 produced each ala dureal oh: Head, rostrum 
small, lateral corners scarcely produced. Eyes (in fig.) oval, dark. Antenna 1 
shorter than pedunele of antenna 2, flagellum with about 7 joints, accessory 
flagellum with only 3, the last very minute. Antenna 2, ultimate joint of peduncle 
?/, aslong as penultimate, flagellum a little longer than ultimate, 8-jointed. Mouth- 
parts not deseribed. Gnathopod 1, 5tk joint not produced, 6!" widening gradually 
from base, palm oblique, well arched, searcely more than '/, of total length 
of joint. Gnathopod 2, 5tk joint not produced, 6!" ovate, greatest width at 
commencement of palm, which is slightly defined, a little longer than hind 
margin. Peraeopods 1 and 2, finger little more than '/, length of 6% joint. 


Peraeopod 5, 6% joint slightly longer than 5%, finger scarcely more than 


!/, as long. Uropod 3, rami very broad and foliaceous. Colour pale with 
markings of deep pur ple, a spot on ultimate joint of pedunele in antennae 1 and 2, 
the purple suffused over part of head, and most of peräeon, but on peraeopods 
and the other parts in spots and blotches. L. 6 mm. 

English Channel (Guernsey). 


19. Fam. Oedicerotidae 


- 1865 Subfam. Oedicerina, W. Lilljeborg in: N. Acta Soc. Upsal., ser.3 0.6 nr.1 
p-18 | 1871 Subfam. Oedicerinae, A. Boeck in: Forh. Selsk. Christian., 1870 p.160 | 
1883 Oediceridae, J.S. Schneider in: Tromse Mus. Aarsh., 0,6 (p.1) | 1888 O., T. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 835 | 1892 O., G. O. Sars, Crust. Norway. v.1 p.286 | 
1893 Oediceridi, A. Della Valle in: F. Fl. Neapel, v.20 p.531. 


EEE ES ze TE a a Aa ee Lehe 5 DT Re ee ce DE A BEE a 
a ee Te Fe u Te 
EN Sega En er at ” & 


TE u“ a Sn BES ER E  > 


a 


236 Oedicerotidae 


Side-plates of moderate size, fringed with setae. Pleon segments 1—3, 
postero-lateral corners usually rounded. Eyes (Fig. 61, 62), when present and 
distinctly developed, usually contiguous, approximate or wholly confluent, dorsal 
and more or less frontal. Antenna 1 (Fig. 61, 67) with accessory flagellum absent 
or rudimentary. Epistome not projeeting. Upper lip not bilobed. Lower lip 
with inner lobes separate or coalesced. Mandible, molar variable, palp usually 
large. Maxillipeds, plates well developed, but seldom large. Gnathopod 1 
(Fig. 65) subchelate. Gnathopod 2 (Fig. 66) subchelate or rarely chelate. 
Peraeopods 1—4 (Fig. 63), 4" joint moderately large. Peraeopods 3 and 4, 
24 joint elliptie, fringed with plumose setae. Peraeopod 5 (Fig. 64) very 
long, 24 joint expanded, 7 stiliform. Branchial vesieles usually simple, large. 
Uropods 1—3 commonly extending equally far back. Telson small, entire. 


Marine; many species are known as sand-burrowers. 


18 genera, 56 accepted species and 6 doubtf£ul. 


Synopsis of genera: 


line of demarcation — 2. 
Eyes not completely confluent — 3. 
f Eyes (Fig. 61) not prominent .. . . . 1. Gen. Perioculodes . . .'p. 237 
\ Eyes (Fig. 62) prominent . ...... 2. Gen. Gulbarentsia . . . p. 238 


® not contiguous, though distinetly 


| Eyes completely eonfluent, without median 
: | 


2 


BOVolDDen Tin Ha RT, 3. Gen. Exoediceros . . . p.2839 
Eyes, when distinetly developed, conti- 

guous or approximate — 4. 
A Gnathopod 2 chelate — 5. 

Gnathopod 2 (Fig. 66) subehelate — 6. 
5 f Mandible, molar normal... ..... 4. Gen. Pontocrates. . . . p.239 
\ Mandible, molar degraded. .. ... . 5. Gen. Synchelidium - . . p. 241 


3 


Mandible, molar without triturating sur- 
6 face — T. H 
Mandible, molar with triturating surface — 8. 
Gnathopods 1 and 2 alike in structure . 6. Gen. Oediceros. . . . . p. 243 
Gnathopods 1 and 2 unlike in structure 7. Gen. Paroediceros . . . p.245 
Uropod 3 much longer than uropods land2 8. Gen. Haliereion . . . . p.247 
Uropod 3not longer than uropods 1 and 2 — 9. 
Mandible, 2d joint strongly curved — 10. 
Mandible, 2djoint not strongly curved —12. 
Front of the head not produced .. .. 9. Gen. Arrhis ...... p: 248 
Front of the head produced — 11. 


2 
1 | Gnathopods 1 and 2, palm very oblique 10. Gen. Westwoodilla. . . p.249 


9 


fa 
oO 


Gnathopods 1 and 2, palm nearly transverse 11. Gen. Carolobatea. . . . p.252 
Front of the head not produced . . . . 12. Gen. Oediceropsis . . . p.252 
Front of the head (Fig. 67) produced — 18. 

Back'multicarinste ; 2.222... 2..2.0..% 13. Gen. Acanthostepheia . p.253 
Back not multicarinate — 14. 


12 


13 


Eyes (Fig. 67) wanting or not placed on 
rostral projection — 15. 
Eyes or ocular pigment on rostral pro- 
jeetion — 16. 
Peraeopods 1 and 2 (Fig. 63) with widened 
Sinbectiu Auen, 1, NIS hah shi 14. Gen. Aceroides. . -. - - p. 254 
Peraeopods 1 and 2 without widened joints 15. Gen. Bathymedon . . . p.255 


14 


15 


re ee 
DE NER Ten ’ . Eher er 


Oedieerotidae, Perioeulodes 237 


16 Antenna 1 longer than antenna 2 . . . 16. Gen. Monoeculopsis . . . p.257 
Antenna 1 not longer than antenna 2 — 17. j ; 


Blonde EN gene 17. Gen. Monoculodes . . . p.258 


Gnathopod 2 (Fig. 66), process of 5th joint 
17 
| enden 2, process of 5th joint broad 18. Gen. Oediceroides . . . pP. 267 


4. Gen. Perioculodes 0. Sars 


1892 Perioculodes (Sp. un.: P. longimanus), G.O.Sars, Crust. Norway, v.1 p.312| 
1895 P., A. M. Norman in: Ann. nat. Hist., ser. 6 v.15 p. 486. 


Side-plates moderately deep. Rostral projection short, deflexed. A single 

‘eye (Fig. 61) encircling front of head, lenses highly refractive. Antenna 1 in O 
rather longer than antenna 2, 1%, 24 and 34 joints 
 subequal, in J (Fig. 61) 24 shorter than 1°, 34 than 24, 
- —  flagellum stronger than inQ. Antenna 2in J (Fig. 61), 
 flagellum long, filiform. Upper lip broadly truncate. 


E: Lower lip, inner lobes coalesced. Mandible not strong, 
molar feeble, conical, tipped with 3 spinules, palp in © 
rather small, 34 jointshort; in J larger. Maxillae land 2 

nearly as in Monoculodes (p. 258). Maxillipeds, inner 

plates small, outer nearly reaching apex of 24 joint of 
- palp, armed with spaced spines. Gnathopods 1 and 2, 
= process of 5t" joint very long, stiliform, adjacent to 


"> 18 joint 


x = 34 joint 
\ 


and overtopping hind margin of the narrow 6*% joint, Fig. 61. 
which is long with short palm. Peraeopods 1—5 F.longimanus, 3. 
= Head and antennae. 


and uropods 1—3 nearly as in Monoculodes. Telson Tafter G. 0. Sars.] 
oblong, apically rounded. 


1 species accepted, 2 doubtful. 


1. P. longimanus (Bate & Westw.) 1868 Monoculodes l., Bate & Westwood, 
Brit. sess. Crust., v.2 p.507 | 1892 Perioculodes l., &. O. Sars, Crust. Norway, v.1 p.313 
t.110 £.2; t.111 £.1| 1895 P. 1, A. M. Norman in: Ann. nat. Hist., ser. 6 v.15 p.486 | 
1893 Oediceros l. (part.). A. Della Valle in: F. Fl. Neapel, v.20 p.547 t.4 f.9; t.33 
2.32 —36 | 1871 Monoculodes grubei, A. Boeck in: Forh. Selsk. Christian., 1870 p. 165 | 
1888 M. aequimanus (err., non Oedicerus a. Kossmann 1880!), (A. M. Norman in MS.) 
F: D. Robertson in: P. nat. Hist. Soc. Glasgow, n. ser. v.2 p.30. 


= Head, rostral projection short, broad, triangular, lateral corners rounded. 
2 Side-platel rather expanded and obliquely truncate, 24 and 3% oblong, with small 
tooth at lower hind corner, 4" very large, lower hind corner a little produced, 
obtuse, 5!" broader, less deep. Eyes broadest at top, bright scarlet with about 
12 brilliantly iridescent lenses on each side. Antenna 1 in 9, flagellum little over 

half length of pedunele, with 6 joints, in J flagellum as long as pedunele, 1% joint - 
very large, densely clothed the sensory hairs not shown in Fig.61). Antenna 2 in 
Q, ultimate and penultimate joints of peduncle subequal, together as long as 
flagellum. Antenna 2 in J twice as long asinO©. Gnathopod 1, process of 5tt joint 
rather flexuous, nearly reaching end of 6%, which is about thrice as long as broad, 
palm nearly as long as hind margin. Gmnathopod 2, process of 5tk joint 
® extending much beyond 6!" joint, which is 4 times (Sars) or about 5 times 
E (Norman) as long as broad, palm much shorter than hind margin. Peraeo- 
pods 1—4 moderately slender, densely setose, in 1° and 24 finger narrowly 
acuminate, not half length of broad 6** joint, in 34 and 4!" Janceolate, compressed. 
Peraeopod 5, 24 joint quadrangular oval, 5t" and 6 subequal, each longer 


In ve 


m 


b ae Ne RI ee Rue 2a rei I N a ah er a 


238 Perioeulodes, Gulbarentsia 


than 4", Uropod 3, rami as long as peduncle, very narrow, unarmed. Telson 
nearly twice as long as broad, apex evenly rounded. Colour pale orange; 
ova in pouch dark bluish. L. 4 mm. 


Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (Norway, France, Great 
Britain); Kattegat; Mediterranean. Shallow water. 


P. aequimanus (Kossm.) 1880 Oedicerus a., Kossmann, Reise Roth. Meer., 
v.2ı Malacost. p.130 t.13 f.6—8 | 1893 Oediceros longimanus (part.), A. Della Valle 
in: F, Fl. Neapel, v.20 p. 547. 

Probably young 2 (doubtful marsupial plates on peraeopods 8—5). 


Red Sea. 


P. megapleon (Giles) 1888 Monoculodes m., G. M. Giles in: J. Asiat. Soc. 
Bengal, 0.57 p.235 t.7 f.12 | 1893 Oediceros longimanus (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 547. 

Perhaps identical with P. longimanus (p. 237). L. 3'2 mm. 


Bay of Bengal (banks off Chittagong). Surface. 


2. Gen. Gulbarentsia Stebb. 


1894 Barentsia (Sp. un.: B. hoeki) (non T. Hincks 1880, Bryozoa!), Gulbarentsia, 
T. Stebbing in: Bijdr. Dierk., ©.17 p. 25, 2. 

Head without frontal process or rostrum (Fig. 62). Side-plates not 
large, 1° distally expanded, 4% not excavate behind. Eye single, prominent, 
forming a semicireular ring (Fig. 62). Antenna 1 shorter than antenna 2, 
flagellum in both many-jointed. Upper lip with rounded sides, distally 
narrowed. Lower lip, inner lobes small, distinet. Mandible normal, but 
molar small, palp elongate, 39 joint longer than 24. Maxilla 1, inner plate 
with 2 setae, outer with 7 spines, 24 joint of palp apically narrowed. 
Maxilla 2, plates subequal. Maxillipeds, inner plates small, outer reaching 
half way along the large and long 24 joint of palp, elosely fringed with 
slender spines. Gnathopods 1 and 2 similar, 5t" joint much shorter than 6th, 
with strongly projecting setose process, 6% long oval, the long spinose palm 
moderately defined. Peraeopods 1 and 2, finger much shorter than 6t% joint. 
Peraeopods 3 and 4, 24 joint little expanded, finger longer than 6!" joint, with 
a cap over the nail. 


1 species. 


1. G. hoeki Stebb. 1894 Barentsia h., Gulbarentsia, T. Stebbing in: Bijdr. 
Dierk., v.17 p.25 t.5. 


Head, front broadly convex, lateral angles acute, a dorsal carina behind 

the eye (Fig. 62). Peraeon segments 1—6 transversely ridged on front and 
hind margins, 5tk and 6!" with median carinate tooth and 

- postero-lateral angles acute. Side-plates partially serrate 
and spinulose, 5tt and 6 with hind angles of lobes acute. 

Eye large, collar-like, with many lenses, separated from 

front of head by a narrow groove. Antennae 1 and 2 little 

Fig. 62. G.hoeki. armed. Antenna 1 (18 mm), 1° joint twice as long as 24, 

Head, dorsal view. Aagellum nearly as long as peduncle, 36-jointed. Antenna 2 

(25 mm), ultimate and penultimate joints of pedunele subequal, flagellum rather 
longer than peduncle, with 160 joints, many very short and broad. Gnathopod 2, 
side-plates apically narrowed, 24 and 6!" joints and lobe of 5" longer than in 


Gulbarentsia, ang Pontocrates 239 


gnathopod 1, palm rather better defined in gnathopod 1. Peraeopods 1—4, 
6" joint eurved, spinose on convex margin, the shorter 5th joint armed on 
the opposite margin. Specimen defective after peraeon segment 6. L.? 


Kara Sea (lat. 72° N., long. 65° E.). 


3. Gen. Exoediceros Stebb. 


1899 Exoediceros (Sp. typ.: Oedicerus fossor), T. Stebbing in: Ann, naf. Hist., 
ser. 7 v.4 p. 208. 


Distinguished from Oediceros (p. 243) by having the rostrum little 
pronounced, the eyes not contiguous though well developed, antenna 1 with 
rudiment of accessory flagellum, mandible with well developed molar and 
the palp’s 24 and 34 joints broad, maxilla 1 with numerous setae fringing 
the inner plate, maxillipeds with inner plates broad, gnathopods 1 and 2 with 
5th joint at least as large as 6%, peraeopods 1 and 2 without finger, peraeo- 
pods 3 and 4 with minute upturned finger, uropod 2 not reaching so far 
back as uropod 1 or uropod 3 


R 


1 species. 


1. E. fossor (Stimps.) 1855 Oedicerus f., Stimpson in: P. Ac. Philad., v.7 p.393 | 

1899 O. f., Exoediceros sp. typ., T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p.208 | 1880 

E O. arenicola, O. f.?, Haswell in: P. Linn. Soc. N.S.Wales, v.4 p.325 t.24 f.3 | 1893 
‚ Oediceros a., Halimedon sp.?, A. Della Valle in: F. Fl. Neapel, v.20 p. 556. 


Eyes small, rounded oval. Antenna 1, joints of peduncle successively 
a little shorter, flagellum attaining to about 24 distally widened joints 
carrying small calceoli, accessory flagellum a little blunt joint tipped with 

long setae. Antenna 2, flagellum as in antenna 1, at least in O0. Upper 

___]ip rounded. Maxilla 2, with outer lobe the broader, inner with row of setae 
eurving from surface along i inner margin. Gnathopods 1 and 2 rather larger in 
Ö than in O (Haswell), 24 gnathopod larger than 1°, but similar, 5t"joint distally 

wide, setose, lobed, not produced along the oval 6%. Peraeopods 1—-4 have the 

4b and 5th joints distally widened, 4" much longer than 5t", both strongly 

 setose, 6!" narrow, with rows of setiform spines and spinules. Peraeopods 3—5 

have the 2% joint oval, with numerous setae projecting from within the expansion. 

Peraeopod 5 elongate as in Oediceros. Uropods 1 and 2 with few spines on 

the slender subequal rami, which are much longer in the 1° than in the 

24 pair. Uropod 3, rami equal, laminar, as long as peduncle, truncate apically, 

with numerous setae or spines. Telson at least as broad as long, narrowing 

slightly to broadly rounded apex, length less than peduncle of uropod 3 
Colour white with a few blackish spots. L. 5—7'5 mm. 


Shark Island and Port Jackson [East-Australial. Burrowing in sand above 
high-water mark. _ 


4. Gen. Pontocrates Boeck 


1871 Pontocrates (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.171 | 1888 
P., T. Stebbing in: Rep. Voy. Challenger, v.29 p.307 | 1892 P., G. O. Sars, Orust. 
Norway, v.1 p.315. 


Head with short deflexed rostrum.- Side-plates 4 and 5 rather large. 
Eyes contiguous, at base of rostrum. Antenna 2 in Q much or little longer 
than antenna 1, in S elongate. Upper lip nearly quadrate. Lower lip, 
inner lobes separate from one another, but coalesced with outer lobes. Mandible 
normal. Maxilla 1, inner plate with 2 setae, outer with 9 spines. Maxillipeds, 


le LE ae a FE RE a N, or, 


240 Pontocrates 


outer plates scarcely reaching beyond middle of large 24 joint of palp. 
Gnathopods 1 and 2 very dissimilar. Gnathopod 1, 5t% joint with short base 
and long process, 6! oval, palm well defined. Gnathopod 2, 5! joint with 
short base and processproduced beyond the chela which is formed between produced 
end of narrow 6#" joint and short finger (the process appears to be partially 
coalesced with the 6% joint, though less so than in Synchelidium (p. 241). 
Peraeopods 1—4 rather stout, densely setose, finger minute. Peraeopod 3 
very short. Peraeopod 5, 24 joint broad oval, subequal in length to 4*h, 
5th, 6th or 7, Uropod 3, rami narrow, longer than peduncle. Telson small. 


3 species. 


Synopsis of species: 
j Antenna 2 in @ much longer than antenna 1... .. 1. P.altamarinus . p. 240 
\ Antenna 2 in 2 little longer than antenna 1 — 2. 
Gnathopod 2, thumb of chela much broader than 
finger, process of ö5th joint little produced 
EEE EUER, 2. P. arceticus . . . p.240 
Gnathopod 2, thumb of chela scarcely broader 
than finger, process of 5th joint much produced 
Boyd BMI ve ee Er 3. P. arenarius . . p.241 


1 


2 


1. P.altamarinus (Bate & Westw.) 1862 Kroyera altamarina, Bate & Westwood, 
Brit. sess. Crust., ©. 1 p. 177 f. | 1893 Kröyera a., A. Della Valle in: F. Fl. Neapel, v. 20 
p. 554 | 1895 Pontocrates altamarinus, G.O. Sars, Crust. Norway, v.1 p.695 t. vu f.2. » 


Moderately robust. Rostrum a little projesting, moderately deflexed. 
Side-plate 1 expanded and rounded distally, 24 and 34 slightly narrowed 
distally, 4% rather produced at lower hind corner. Eyes rather large, yellowish 
red. Antenna 1 much shorter than antenna 2 in both sexes, 24 joint fully 
as long as 1°, flagellum shorter than pedunele, 8-jointed. Antenna 2 in 9, 
ultimate joint of peduncle longer than penultimate, flagellum longer than peduncle. 
Gnathopod 1, process of 5!" joint not reaching much beyond hind margin 
of 6%, which is rather large, oval fusiform, palm obliquely eurved, much longer 
than hind margin, densely fringed with minute curved spinules. Gmathopod 2, 
process of 5% joint produced very little beyond chela, 6!" joint slightly tapering, 
thumb of chela little broader than finger, fringed as in palm of gnathopod 1. 
Peraeopods 1 and 2 moderately robust, 6" joint narrower than 5%, but subequal 
in length. Uropod 3, pedunele rather long, rami unarmed (Sars, but?). 
Telson oval, apex a little insinuate. Colour semipellucid, dorsally marbled 
with opaque light yellowish, antennae banded with orange; ova in pouch 
reddish brown. L. Q nearly 7 mm. 


North-Atlantie and North-Sea (Skudesnes, depth 38 m; France; British Isles). 


2. P. arceticus O. Sars 1883 P. norvegieus (err., non Oedicerus n. A. Boeck 
1861), J. S. Schneider in: 'Tromse Mus. Aarsh., v.6 p.17 t.2 f.15; t.3 f.21, 22 | 1889 
P.n., Hoek in: Tijdschr. Nederl. dierk. Ver., ser.2 v.2 p.193 t.9 f.8 | 1892 P.n., G. 0. 
Sars, Crust. Norway, v.1 p.315 t.111 f.2 | 1895 P. arcticus, G. ©. Sars, Crust. Norway, 
v.1 p. 698. | 


Rather stout, tumid in front. Rostrum short, much deflexed. Side- 
plate 1 with lower margin flattened, slightly insinuate, 29 rather narrowed 
distally, 39 not so, 4% rather produced at lower hind corner. Eyes rounded, light 
red with whitish coating. Antenna 1 in Q nearly as long as antenna 2, 24 joint 
shorter than 1°, flagellum nearly as long as peduncle, 8- or 9-jointed. Antenna 2, 
ultimate and penultimate joints of peduncle subequal, flagellum in 9 a little, in C 


Fe 

I: 

iR 

hi: 

Fi 
Bi. 
BB; 

Bi 

Be; 


Pontocrates, Synchelidium 241 


very greatly, longer than pedunele. Gnathopod 1, process of 5 joint reaching 
much beyond hind margin of 6'%, which is oval, constrieted at base, considerably 
expanded distally, palm obliquely eurved, somewhat longer than hind margin, 
edge smooth with row of minute curved spinules. Gnathopod 2, process of 
5th joint produced very little beyond chela, 6% joint scarcely tapering, nearly 
6 times (Sars) or 5 times (Schneider) as long as broad, thumb of chela 
much broader than finger. Peraeopods 1 and 2 rather stout, 6b joint shorter 
than 5th, finger extremely small. Uropod 3, peduncle rather long, rami 
each with 2 spinules. Telson rounded, apex obtusely truncate, beset with 


‚8 spinules (Schneider). Colour yellowish, antero-dorsally tinged with orange. 


L. © 6 mm. 
Arctie Ocean (Finmark). Depth 11—19 m. 


3. P. arenarius (Bate) 1858 Kroyera arenaria, Bate in: Nat. Hist. Northumb,, 


. ©.4ı p.15 t.2 f.1 | 1862 Kröyera a., Kroyea (laps.) a., Bate, Cat. Amphip. Brit. Mus., 


p-106 t.17 £.4 | 1893 Kröyera a., A. Della Valle in: F. Fl. Neapel, v.20 p. 554 | 1888 
Pontocrates arenarius, T. Stebbing in: Rep. Voy. Challenger, v.29 p.307 | 1889 P. a., 
Hoek in: Tijdschr. Nederl. dierk. Ver., ser.2 v.2 p.192 t.9 £.7,8 | 1861 Oedicerus nor- 
vegicus, A. Boeck in: Forh. Skand. Naturf., Mode 8 p.650, 652 | 1871 Pontocrates n., 
A. Boeck in: Forh. Selsk. Christian., 1870 p.171 | 1876 P.n. + P.n.var., A. Boeck, 
Skand. Arkt. Amphip., ©.2 p.288 t.16 f.4; t.15 £ 711895 P.n., @.0. Si Crost. 
Norway, v.1 p.693 t.vı £.2; t. vu £.l. 


Robust, segments dorsally sharply defined. Rostrum short, slightly 
curved. Side-plate 1 with distal part transversely truncate, 24 tapering to 
an obtuse point, 3% with oblique slightly insinuate distal margin, 4!" much 
deeper than the preceding, little produced at lower hind corner. Eyes 
rounded, light red with no whitish eoating. Antenna 1 in O not much shorter 
than antenna 2, 24 joint a little shorter than 1%, flagellum subequal to 
peduncele, with 9 joints, in C stouter, flagellum with 11 joints, first 6 or 7 densely 
hirsute. Antenna 2, ultimate and penultimate joints of peduncle subequal, flagellum 
in © as long as peduncle, in G very much longer, filiform. Gnathopod 1, process of 
5th joint reaching beyond 6%, which gradually widens distally, palm nearly 
transverse, not as long as hind margin, densely fringed with long stiff setae. 
Gmathopod 2 very slender, process of 5!" joint produced considerably beyond 
chela, 6% joint very narrow, thumb of chela little broader than finger. 
Peraeopods 1 and 2, 5t" joint broad, scarcely longer than 6, finger almost 
obsolete. Peraeopod 5, 24 joint oval quadrangular, with straight hind margin. 
Uropod 3, peduncle shorter than in the 2 preceding species, rami with a 
few spinules. Telson oval, apex evenly rounded. Colour semipellueid, whitish, 
slightly tinged with yellowish. L. © 6, C 6:5 mm. 


North-Sea (Skudesnes, depth 19 m; Dutch and British eoasts); Christianiafjord. 


5. Gen. Synchelidium 0. Sars 


1871 Pontocrates (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.171 | 1892 
Synchelidium, G. ©. Sars, Crust. Norway, «.1 p. 317. 


Head with more or less strongly deflexed ee: Side-plate 1 distally 
expanded, with straight lower margin, 4% and 5t% rather large. Eyes 
eontiguous, at base of rostrum. Antenna 1 in O longer than antenna 2, 3% joint 
rather long. Antenna 2 in Ö very elongate. Mandible, molar small, conical, 
tipped with 1 spine, 34 joint of palp in © small. Maxilla 1 as in Pontocrates 
(p. 239). Maxilla 2, plates short, outer apically truncate. Maxillipeds, outer 

Das Tierreich. 21. Lief.: T.R.R. Stebbing, Amphipoda I. 16 


242 Synchelidium 


plates with only a few strong spines. Gmathopod 1 powerful, nearly as in 
Pontoerates, but process of 5! joint tipped by a strong spine, palm coarsely 
dentate. Gnathopod 2, process of 5! joint coalesced with 6", except near 
the small chela, in which thumb and finger are both narrow. Other parts 
in agreement with Pontocrates. 


4 species. 


Synopsis of species: 


1 J Blotehed with brown — 2. 


\ Pellueid, without pigmentary ornament — 3. 

9 Gnathopod 1, 6th joint broadly oval... ... 1. S. haplocheles . . p.242 
Gnathopod 1, 6th joint elongate oval . ... . 2. 8. maculatum . . p.242 
Rostrum much deflexed, lateral corners of head 

3 | a RE a a EL 3. 8. tenuimanum . p.243 

| Rostrum little deflexed, lateral corners of head 
a N ne 4. 8. intermedium . p.243 


1. S. haplocheles (Grube) 1864 Kroyeria h., E. Grube, Lussin, p.72 | 1893 
Kröyera h. (part.), A. Della Valle in: F. Fl. Neapel, v. 20 p-553 t.3 f.15; t. 34 f. 3539 | 
1868 Kroyera brevicarpa, Bate & Westwood, Brit. sess. Crust., v. 2 p. 508 f. | 1892 
Synchelidium brevicarpum, G. O. Sars, Crust. Norway, v.1 p.318 t.112 £.1. 


Not robust, but back broadly rounded. Rostrum short, evenly curved, 
scarcely reaching beyond middle of 1° joint of antenna 1. Eyes rather large, 
rounded, bright red, with whitish eoating. Antenna 1 in O slender, 1°t and 24 joints 
subequal, 39 not much shorter, flagellum much shorter than peduncle, 5-jointed, 
in d 24 and 34 joints shorter and thicker, flagellum as long as peduncle, its 
1° joint large, densely clothed. Antenna 2 in 9 shorter than antenna 1, ultimate 
and penultimate joints of peduncle subequal, together as long as flagellum. Gnatho- 
pod 1, process of 5t" joint a little dilated, then tapering, produced considerably 
beyond hind margin of 6%, which is wide at the middle, fusiform, palm 
much longer than hind margin, defined by an angular projecetion and strong 
spine, its edge denticulate, 6 of the denticles large and blunt (Sars, but 
scarcely so in Della Valle’s Fig... Gnathopod 2 rather slender, 6% joint 
thickened at base, thence tapering, chela about '/, of its length, a little 
overtopped by process of 5" joint. Peraeopods 1 and 2 moderately strong, 
5th and 6th joints subequal, finger minute. Peraeopods 3 and 4, finger less 
insignificant. Peraeopod 5, 5! joint the longest. Uropod 3, rami very 
slightly longer than peduncle, slender, unarmed. Telson rather large, oblong 
oval, apex slightly insinuate. Colour whitish, variegated with dark brown, 
this forming transverse bands on some segments. L. 4—5'5 mm. 


North-Atlantie, North-Sea and Skagerrak (South- and West-Norway, Trondhjems- 
fjord, depth 19—56 m; Great Britain); Mediterranean. 


- 2. S. maculatum Stebb.*) 1893 Kröyera arenaria (err., non Kroyera a. Bate 
1858!), A. Della Valle in: F. Fl. Neapel, v.20 p.554 t.4 f.1; t.34 f. 18-34. 


Slender. Eyesred. Antenna 1, 1° joint a little longer than 24, 24 than 3°, 
flagellum as long as 24 and 34 combined, with 4 rather elongate joints. Antenna 2, 
ultimate joint of peduncle shorter than penultimate, flagellum 6-jointed. Gnatho- 
pod 1, process of 5th joint reaching end of hind margin of 6, which is 
ellipsoidal, more than twice as long as broad, palm longer than hind margin, 


*) Sp. nov. 


ü 
$ 
Fi 
ö 


RE TIEENE Bee LE oh la 


Synehelidium, Oedideros 243 


defined by a stout spine, divided into numerous little teeth, of which 5 
interspersed are more conspicuous than the rest. Gnathopod 2, 24 joint 
distally constrieted, process of 5!" showing separation or suture at base, then 
eoalesced till near the chela, which it a little overtops, long 6t" joint rather 
wide at base, the narrow thumb fringed with minute dentiele and 4 larger 
hooked ones at apex, finger apically hooked. Telson subquadrate, not longer 
than broad. Colour reddish yellow, with large brown scars of various shapes 
on head and trunk, all the appendages pellueid, violet-grey. L. 4—5 mm. 


Mediterranean. 


3. S. tenuimanum Norm. 1871 Pontocrates haplocheles (err., non Kroyeria h. 
E. Grube 1864!), A. Boeck in: Forh. Selsk. Christian., 1870 p.172 | 1876 P. h., A. Boeck, 
Skand. Arkt. Amphip., v.2 p.289 t.16 f.3 | 1892 Synchelidium h., G. O. Sars, Crust. 
Norway, v.1 p.319 t.112 f.2 | 1893 Kröyera h. (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p.553 | 1895 Synchelidium tenuwimanum, A. M. Norman in: Ann. nat. Hist., ser. 6 
v.15 p..486. 


Moderately stout. Head strongly arched, rostrum vertically deflexed, 
acute, nearly reaching end of 1° joint of antenna 1; lateral corners angularlv 
produced. Eyes rather small, lenses few, bright red with chalky white coating. 
Antenna 1 in ©, 1° joint longer than 24, flagellum subequal to peduncle, 

7-jointed. Antenna 2 in © shorter than antenna:1 ‚Hagellum subequal to pedunele. 

Gmathopod 1, 5!" joint as in S. haplocheles, 6th much expanded, oval triangular, 
palm divided into 7 or 8 coarse denticles. Gnathopod 2 extremely slender, 
6 joint narrow at base, but much more so at the chela, which is scarcely 
more than !/, of its length, overtopped very slightly by a narrow point of 
the process of the 5tk joint. Peraeopods 1 and 2, 6! joint shorter than 5, 
finger minute. Peraeopod 5, 5tk and 6! joints subequal. Telson rather 
small, scarcely longer than broad, insinuate slightly at apex. Colour pellueid, 
whitish, not at all diversified; ova in pouch orange. L. O0 4 mm. 


North-Atlantie and North-Sea (Norway). Depth 94—564 m. 


4. S.intermedium 0. Sars 1892 S.i., G. O. Sars, Crust. Norway, v.1 p. 320 
113 £.1. 

Head, rostrum slightly deflexed, scarcely reaching beyond middle of 
1° joint of antenna 1; lateral corners obtusely rounded. Side-plate 1 with lower 
front eorner more angular than in the 2 preceding species. Eyes rather small, 
lenses few, licht red with whitish coating. Antenna 1 in O, 24 joint fully as 
long as 1°, 34 rather long, flagellum much shorter than pedunele, 6-jointed. 
Antenna 2 in O much shorter than antenna 1, flagellum scarcely as long as 
pedunele. Gmathopod 1 nearly as in S. haplocheles, but process of 5! joint 


. less produced. Gnathopod 2 more slender than in S. haplocheles, but less 


elongate than in S. tenuimanum, chela about '/, as long as 6*k joint. Peraeo- 
pods 1 and 2, 5t" and 6% joints subequal, otherwise peraeopods 1—5 about asin 
S. tenuimanum. Telson oval, decidedly longer than broad, apically transverselv 
truncate. Colour pellueid, whitish, not diversified. L. © 4 mm. 


Trondhjemsfjord. Depth 282—750 m.- 


6. Gen. Oediceros Kroyer 


1842 Oediceros (Sp. un.: O. saginatus), Kreyer in: Naturh. Tidsskr., v.4 p. 155 | 
1892 O., G. O. Sars, Crust. Norway, v.l p.287 | 1893 O. (part.), A. Della Valle in: 
F.Fl. Neapel, v.20 p.541 | 1853 Oedicerus (non Kollar & L. Redtenbacher 1844, Coleoptera!), 
J, D. Dana in: U.S. expl. Exp., e.13u p.933 | 1882 Aedicerus (laps.), Haswell, Cat. 
Austral. Crust., p. 238, 315. 


16* 


244  : ° . Oediceros 


Back of peraeon broad. Rostrum deflexed, acute. Eyes distinet, contiguous, 
at base of rostrum. Antenna 1 shorter than antenna 2, peduncle of each 
elongate. Upper lip rounded. Mandible, molar without triturating surface, 
palp robust. Maxilla 1, inner plate with a few setae, outer plate narrow. 
Maxilla 2, plates oval, subequal. Maxillipeds, outer plates strongly fringed 
with spines. Gmnathopods 1 and 2 similar and nearly equal, 5% joint produced 
to a setose lobe, 6!" oval, palm very oblique. Peraeopods 1—4 short, stout, 
setose, finger lanceolate. Telson rounded quadrangular. 


2 species accepted, 1 doubtful. 
Synopsis of accepted species: 


Rostrum goiniculabe: "2.0 ee ein l. O. saginatus . p.244 
Rostrum vonliy Burvall sa a a 2. O. borealis . . p. 244 


1. O. saginatus Kroyer 1842 O.s., Kreyer in: Naturh. Tidsskr., v.4 p.156 | 
1883 O.s., J. S. Schneider in: Tromse Mus. Aarsh., ©.6 p.11 t.2 £.10 | 1892 O.s., 
G. O. Sars, Crust. Norway, v.1 p.288 t.102 | 1893 O.s. (part.), A. Della Valle in: F. Fl. 
Neapel, 0.20 p.551 t.58 £. 71, 72. 


Head, rostrum abruptly deflexed, acute, nearly reaching apex of 1° joint 
of antenna 1; lateral corners quadrate. Side-plates not deep, 4 scarcely 
emarginate behind, 5'% broader and nearly as deep. Eyes within a rounded 
prominence, dark red. Antenna 1, 1° and 24 joints equal in length, 
flagellum scarcely as long as peduncle, 13-jointed. Antenna 2, ulti- 
mate joint of peduncle as long as penultimate and antepenultimate com- 
bined, flagellum rather shorter than peduncle. Gnathopods 1 and 2, 
process of 5th joint slightly eurved and a little dilated in the middle, densely 
tufted, 6% joint oblong oval, more than twice as long as broad, palm 
denticulate, long, gently curved, defined by a little tooth, finger long and 
curved. Peraeopods 1—-4, finger rather short. Peraeopod 5 more than half 
length of body, 24 joint with sinuous hind margin. Uropod 3, inner ramus 
rather the longer, with 4 spinules.. Telson little longer than broad,' apex 
transversely truncate. Colour whitish, tinged with orange, head reticulate 
and back banded with brown violett. L. 20—30 mm. 


Aretic Ocean and North-Atlantie (Greenland, Iceland, Spitzbergen, Murman 
coast, Siberian Polar Sea, Norway). 


2. O. borealis Boeck 1871 O.b., A. Boeck in: Forh. Selsk. Christian., 1870 
p. 162 | 1876 O.b., A. Boeck, Skand. Arkt. Amphip., ©.2 p.261 t.14 f.1| 1892 O.b., 
G. 0. Sars, Crust. Norway, ©.1 p.290 t.103 £.1 | 1893 ©. saginatus (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p.551. 


Head, rostrum evenly curved downward, reaching little beyond middle 
of 18 joint of antenna 1; lateral corners rounded. Side-plates rather large, 
1°t somewhat pentagonal, 4 distinetly emarginate, deeper than 5{". Eyes 
rather small, contiguous. Antenna 1, flagellum 10-jointed. Antenna. 2, 
ultimate joint of peduncle scarcely longer than penultimate, flagellum subequalto 
peduncle. Gnathopods 1 and 2 very strong, process of 5!" joint narrow, sparingly 
setose, 6! tumid, oval, palm not very long, defined by a little tooth, finger 
to match the palm. Peragopods 1—4 less stout than in O. saginatus, finger 
in peraeopods 3 and 4 rather long. Peraeopod 5, 24 joint rounded oval, hind 
margin scarcely sinuous. Uropod 3 rather small, rami very narrow, inner 
with 1 spinule. Telson much longer than broad, apex broadly rounded. 
L. © 9 mm. 


Arctic Ocean (Greenland, Finmark). 


5 
Ei 


Oediceros, Paroediceros 245 


0. latrans (Hasw.) 1880 Oedicerus l., Haswell in: P. Linn. Soc. N.S.Wales, 
v.4 p.324 t.19 £. 1 | 1893 Oediceros |., A. Della Valle in: F. Fl. Neapel, v.20 p. 556. 


Bondi Bay [New South Wales]. Burrowing in the sand between tide marks. 


7. Gen. Paroediceros 0). Sars 
1892 Paroediceros, G. O. Sars, Crust. Norway, v.1 p.291. 


Front of head produced to a process bearing the contiguous eyes, when 
present, at its distal end. Antenna 1 much shorter than antenna 2. Upper lip with 
flattened margin. Mandibular palp slender. Gnathopod 1, process of 5th joint 
insignificant, 6!" joint elongate, distally widened. Peraeopods comparatively 
slender. Other characters agreeing: with Oediceros (p. 243). 


5 species. 


Synopsis of species: 


Gnathopod 1, 6th joint extremely elongate — 2. 

! Gnathopod 1, 6th joint not extremely elongate — 8. 

9 | Frontal process small, without eyes . ...... 1. P. macrocheir . p.245 
‚Frontal process well developed, with eyes . : . . 2. P.intermedius . p. 245 

3 | Frontal process deflexed . . -... 2... ... . 8. P. eurvirostris . p.246 
Frontal process horizontal — 4. 

4 j Eyes large, transverse bands of colour on body . 4. P.l1ynceus . . . p.246 

\ Eyes small, no colour bands on body . .. . . . 5. P. propinguus . p.246 


1. P. macrocheir (O. Sars) 1879 Oedicerus m., G.O.Sars in: Arch. Naturv. 
Kristian., .4 p,449 | 1885 Oediceros m., G.O.Sars in: Norske Nordhavs-Exp., v.6 
Crust. I p. 170 t.14 £.4 | 1887 O.m., H. J. Hansen in: Dijmphna Udb., p.221 | 1892 
O. m., Paroediceros (part.), &. O. Sars, Crust. Norway, v.1 p.291 | 1893 O. Iynceus (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 546. 


Head arched, frontal process very small, not tumid. Side-plates 1—4 
large and broad, densely fringed, 4 scarcely so deep as the others, 5th 
distinetly bilobed, 6! and 7tk small. Eyes wanting. Antenna 1 very short, 
1° and 24 joints equal in length, flagellum shorter than peduncle, 8-jointed. 
Antenna 2 more than twice length of antenna 1, ultimate and penultimate 
joints of peduncle robust, ultimate the shorter, flagellum slender, rather long. 
Gnathopod 1 very long, 24 joint large and muscular, 3d—5th very short, 
6% more than 4 times as long as broad, dilated distally, palm arcuate, 
oblique, defined by obtuse projection and strong spine. Gmathopod 2 shorter, 
5th joint narrowly produced, 6!" shorter and broader than in gnathopod 1, 
palm very oblique, about half length of the joint. Peraeopods 1 and 2 rather 
slender, very hirsute, finger large, falciform. Peraeopods 3— 5, 2% joint narrowly 
ovate; 4!" peraeopod longer than 34, both very hirsute, with long faleiform finger; 
5th with short simple setae and long needle-like finger. Uropod 3 shorter 
than uropod 2, and uropod 2 than uropod 1. Telson_short, apically rounded. 
Skin pellueid, but with ‘brown-violet arborescent markings. L. 9 18 mm. 

Arctie Ocean (between Jan Mayen and Iceland). Depth 1890 m. 

2. P. intermedius Stebb.*) 1887 Oediceros microps (err., non O. Sars 1882!), 
H. J: Hansen in: Dijmphna Udb., p.220 t.21 f.12 | 1892 Paroediceros (part.), G.O. 
Sars, Crust. Norway, v.1 p. 291, 294 | 1893 Oediceros Iynceus (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 546. 

Intermediate between P. propinquus (p. 246) and P. macrocheir. Frontal 
process produced to end of 1° joint of antenna 1, scarcely deflexed. Side-plates 


*) Sp. nov. 


- 


246 Paroediceros 


distally expanded. Eyes placed at apex of frontal process. Antenna 1 
reaching about to end of peduncle of antenna 2, both agreeing in general 
. with those of P. propinguus. Gnathopod 1 agreeing closely with P. macrocheir. 
L. 115 mm. 


Kara Sea. Depth 113 m. 


3. P. curvirostris (H. J. Hansen) 1876 Oediceros Iynceus (part.), A. Boeck, 
Skand. Arkt. Amphip.. v.2 p:259 t.13 f.4 | 18958 0.1. (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p.546 | 1887 O. cwrvirostris, H. J. Hansen in: Vid. Meddel., ser.4 v.9 
p. 107 t.4 f.4 | 1892 O.c., Paroediceros (part.), G. O. Sars, Crust. Norway, p. 291. 


Head, rostrum deflexed, reaching slightly beyond 1°t joint of antenna 1, 
lateral corners somewhat produced, with rounded apex. Eyes large, some- 
what remote from downcurved apex of rostrum. Antennae a little more 
slender than in P. lynceus. Peraeopod 1, finger much longer than 6% joint; 
in peraeopod 2 rather shorter than it. Peraeopods 3 and 4, finger very little 
longer than 6" joint. Other points agreeing with P. Iynceus, unless the colour 
be fainter. L. Q 12:5 mm. 


Davis Strait (lat. 64° N., long. 53° W., depth 81 m; Godthaab, depth 11-19 m). 


4. P.lynceus (Sars) 1858 Oediceros I, M. Sars in: Forh. Selsk. Christian., 
p-143 | 1876 O.1. (part.), A. Boeck, Skand. Arkt. Amphip., v.2 p.259 | 1883 O.1., J.S. 
Schneider in: Tromse Mus. Aarsh., v.6 p.14 t.2 f.12 | 1888 O.1., T. Stebbing in: Rep. 
Voy. Challenger, 0.29 p.837 t.137s | 1893 O.1. (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p.546 t.58 f.65, 66 | 1892 Paroediceros I., G. O. Sars, Crust. Norway, v.1 p. 292 
t.103 £.2; t. 104 £.1.| 1867 Monoculodes nubilatus, Packard in: Mem. Boston Soe., v.1_ 
p- 298 t.8 £.4. 


Head produced horizontally a little beyond 1°t joint of antenna 1, 
lateral corners produced, acute. Side-plate 1 pentagonal. Pleon segments 1—3 
slightly carinate dorsally. Eyes rather large, contiguous, at extremity of 
frontal process, leaving a minute rostral tip, yellowish red. Antenna 1 in © 
shorter than peduncle of antenna 2, 1° joint longest, flagellum much shorter 
than peduncle, 10-jointed. Antenna 2, penultimate joint of peduncle scarcely 
longer but much thicker than ultimate, very setose, flagellum slender, longer 
than peduncle, in young C still longer, with very many short joints. Gnatho- 
pod 1 in length subequal to gnathopod 2, 24 joint moderately dilated, 6!" 
a little widened at the spine which defines the eurved oblique palm, longer 
than half the joint, finger longer than the palm. Gnathopod 2, 6! joint 
oblong oval, palm more than half its length. Peraeopods moderately- slender, 
finger in peraeopods 1 and 2 shorter than 6% joint, in the others about equal to it 
in length; in peraeopod 5, 29 joint rather broad, hind margin setose. Uropod 3, 
rami as. long as or longer than peduncle, inner one with 1 spinule. Telson 
oval quadrangular, apex truncate, carrying 2 setules. Colour whitish, with 
brownish-violet bands on back and retieulated on head. L. 22—25 mm. 


Arctie Ocean (Greenland, Iceland, Spitzbergen, Murman coast, Siberian Polar 
Sea, Labrador, Finmark). Depth 9—94 m. — No doubt often confused with P. propinquus, 
so that notices of localities and depths are exposed to some uncertainty. 


5. P. propinquus (Gods) 1866 Oediceros p., Goes in: Öfv. Ak. Förh., v.22 p.526 
t.39 £.19 | 1892 Paroediceros propingvus, G.O.Sars, Crust. Norway, v.1 p.293 t.104 f.2 | 
1882 Oediceros microps, G. O. Sars in: Forh. Selsk. Christian., nr. 18 p. 95 t.4 f.8, 8a| 
1883 O.m., J. 8. Schneider in: Tromse Mus. Aarsh., 0.6 p.15 t.2 f.14 | 1893 O. Iynceus 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 546. 


Paroediceros, Haliereion 247 


Near to P.Iynceus, but frontal process less tumid, less long, lateral 
corners of head less produced, side-plate 1 foursided, eyes much smaller, on 
apex of frontal process, bright red. Antenna 1 in ©, 1° joint scarcely longer 
than 24, flagellum with 8 joints, shorter than peduncle, but in J twice length of 
pedunele, with 11 joints, many setose; antenna 2, flagellum in © as long as 
peduncle, in J reaching end of body. Gnathopod 1, 24 joint fusiform, 6!" about 
3 times as long as broad, palm about half its length. Gmnathopod 2 as in 
P. Iynceus, peraeopods more slender, finger long and (in 1° —4th) faleiform ; 
22 joint in peraeopod 5 less dilated. Uropod 3, rami as long as peduncle, 
narrow, quite unarmed. Telson similar, comparatively smaller. Colour light 
yellowish, tinged with rose, with no brown markings. L. 10 —11 mm. 

Arctie Ocean (Varangerfjord (Vadsö), depth 36—146 m; Tromsö, depth 146 m; 
Kvalö [Nordland]; Spitzbergen, depth 7—55 m; Greenland; Iceland). 


8. Gen. Halicreion Boeck 


1871 Halicreion (Sp. un.: H.longicaudatus), A. Boeck in: Forh. Selsk. Christian., 
1870 p.173 | 1876 H., A. Boeck, Skand. Arkt. Amphip., v.2 p.294 | 1892 H., G.O. 
Sars, Crust. Norway, v.1 p.321 | 1873 Halicrion, E.v. Martens in: Zool. Rec., v.8 p.190. 


Head produced to an acute deflexed rostrum. Side-plates of moderate 
size. Eyes contiguous at base of rostrum. Antenna 1 rather shorter than 
antenna 2, slender in Q, in © robust with tumid short-jointed peduncle and 
1°t joint of lagellum enormous. Mouth-parts as in Monoculodes (p. 258), except 
that outer plates of maxillipeds are rather shorter and broader. Gnathopods 
land 2 nearly alike, 6tk joint ovate, process of 5" rather narrower and longer 
in gnathopod 2 than in gnathopod 1. Peraeopods 1—5 as in Monoculodes; 
5! much (not a little, as Boeck says) longer than 3% and 4, Uropod 3 
greatly elongate, projeeting far beyond uropods 1 and 2. Telson very small. 


1 speeies.. 

1. H. aequicornis (Norm.) 1869 Oediceros a., A. M. Norman in: Rep. Brit. 
Ass., Meet. 38 p.278 | 1893 O.a. (part.), A. Della Valle in: F. Fl. Neapel, «.20 p.545 
t.58 f. 638, 64 | 1889 Monoculodes a., A. M. Norman in: Ann. nat. Hist., ser.6 v.3 p.453 
t-20 £.1—5 | 1871 Halicreion longicaudatus, A. Boeck in: Forh. Selsk. Christian., 1870 
p.173 | 1876 H.1., A. Boeck, Skand. Arkt. Amphip., ®.2 p.295 t.21 f.3 | 1892 H.L, 
G. O. Sars, Crust. Norway, v.1 p. 322 t. 113 f.2. 


Rather slender and compressed. Rostrum somewhat compressed, reaching 
a little beyond 1°* joint of antenna 1. Side-plate 1 scarcely expanded, 4 
not very broad. Eyes oval, ill developed, light red, at base of rostrum. 
Antenna 1 in © reaching end of peduncle of antenna 2, 24 joint a little shorter 
than 1°, 34 than 24, each with stiff diverging apical setae, flagellum shorter 
than pedunele, 5-jointed. Antenna 1 ind, 24 and 34 joints very short and thick, 
flagellum twice as long as peduncle, 1° joint longer than other 4 combined, 
with 2 rows of long sensory setae in dense tufts. Antenna 2 alike in Cd 
and ©, ultimate and penultimate joints of peduncle long, slender, subequal, each 
subequal to 5-jointed flagellum. Gmathopod 1, process of 5t" joint scarcely 
reaching palm, which is rather oblique, longer than hind margin. Gnathopod 2 
subequal to gnathopod 1, process of 5tt joint narrower, reaching palm, 6% joint 
also narrower, otherwise similar. Peraeopods not very setose. Peraeopods 1 and 2, 
4'h joint little expanded, in length equal to 6*", a little longer than the finger. 
Peraeopods 3 and 4, 24 joint oval, with setae projecting from within distal half 
of expansion, finger nearly equal to 4" and fully equal to 6!" joint. Peraeo- 


248 Haliereion, Arrhis 


pod 5, very long, 24 joint piriform, 4t" rather shorter than 5tk, 5th than either 6*h 
or finger. Uropods 1 and 2 scarcely reaching beyond peduncle of uropod 3. 
Uropod 3, rami narrow, lanceolate, unarmed, longer than the long peduncle. 
Telson scarcely longer than broad, apieal margin slightly concave. Colour 
whitish tinged with yellow. L. © 5, d 4 mm. 


North-Atlantie, North-Sea and Christianiafjord aber, depth 94—188 m; 
St. Magnus Bay [Shetland Islands], depth 55—110 m). 


9. Gen. Arrhis Stebb.*) 


1861 Aceros (Sp. typ.: Oedicerus obtusus) (non ©. L. Bonaparte 1850, Aves!), 
A. Boeck in: Forh. Skand. Naturf., Mede 8 p.651 | 187F A., A. Boeck in: Forh. Selsk. 
Christian., 1870 p. 172 | 1892 A., G. O. Sars, Crust. Norway, v.1 p. 338. 


Body slender. Head without frontal process. Side-plates not deep, 
1° produced forward. Eyes inconspicuous, their pigment patches not con- 
tiguous. Antenna 1 in Q longer than antenna 2, or as long, peduncle very long, 
much longer than in antenna 2, flagellum short. Lower lip, inner lobes separate. 
Mandible strong, eutting edge little dentate, molar strong, 24 joint of palp 
arcuate. .Maxilla 1, outer plate with 7 spines (Schneider). Maxillipeds, inner 
' plates not reaching apex of 1° joint of palp, outer not nearly reaching apex 
of the distally widened 24 joint. Gnathopods 1 and 2, 5" joint long, produced 
to narrow setose process, 6'" oval, palm oblique, pretty well defined. Peraeo- 
pods 1 and 2 rather longer than peraeopods 3 and 4, finger in all lanceolate. 
Peraeopod 5, uropods 1—3 and telson not generically distinetive. 


1 species. 


1. A. phyllonyx (Sars) 1858 Leucotho@ p., M. Sars in: Forh. Selsk. Christian., 
p- 148 | 1862 Montagua p., Bate, Cat. Amphip. Brit. Mus., p. 369 | 1871 Aceros p., 
A. Boeck in: Forh. Selsk. Christian., 1870 p.172 | 1887 A.p., H.J. Hansen in: Vid. 
Meddel., ser.4 v.9 p.117 t.4 f.7 | 1892 4A.p., G. O. Sars, Crust. Norway, v.1l p.338 
t.119; 1.120 f.1 | 1893 Halimedon p., A. Della Valle in: F. Fl. Neapel, v.20 p.535 t. 58 
f. 23—27 | 1859 Oediceros obtusus, R. M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 
nr.1 p.92 t.4 f.17 | 1861 Oedicerus o., Aceros sp. typ., A. Boeck in: Forh. Skand. 
Naturf., Mode 8 p. 651. - 


Tumid anteriorly. Head tumid with swollen cheeks, front truncate. 
Side-plate 1 produced along lower side margins of head, 34 with insinuate 
lower margin, 5th, 6th and 7tk unusually broad. Eyes separate, on sides of head 
near the front, represented by 2 small patches of whitisb pigment. AntennalinO, 
24 joint nearly twice as long as 1°, setose on both edges, flagellum very 
short, 11-jointed, in (young) © somewhat longer. Antenna 2, ultimate and 
penultimate joints of peduncle subequal, and together as long as flagellum 
in Q, flagellum longer in d. Gmathopod 1, 5" joint longer than 6th, its 
setose process not lying near hind margin of 6", palm longer than the 
hind margin. Gnathopod 2 nearly resembling gnathopod 1, but longer, and 
process of 5th joint narrow, lying near margin of 6, Peraeopods 1 and 2, 
24 joint bent, 4th large, very setose, 5tb and 6!" equal, finger shorter, compressed, 
lanceolate. Peraeopods 3 and 4, 24 joint long oval, finger as long as 6% joint. 
Peraeopod 5 elongate, 24 joint large, elongate piriform, 5% joint shorter than 
4, much shorter than 6t%, Uropods 1 and 2, rami densely spinose, uropod 3, 


*) Nom. nov. üßfıc, without nose. — The name Aceros is preoccupied (1850, 
C. L. Bonaparte, Consp. Av., v.1 p. 90). 


2 
3 
2 
7 
a 
r 


Arrhis, Westwoodilla 249 


rami spinulose, about as long as peduncle. Telson almost a square. Colour 
whitish, with tinge of flesh colour. L. 15—20 mm. 


Arctic Ocean, North-Atlantie, North-Sea and Skagerrak (Greenland, Iceland, 
Spitzbergen ete.; Norway, depth 90—753 m; Bohuslän); German Ocean? 


10. Gen. Westwoodilla Bate 


- 1856 Westwoodea (nom. nud.), Bate in: Rep. Brit. Ass., Meet. 25 p.58 | 1857 
Westwoodia (Sp. un.: W.caecula) (non Brull& 1846, Hymenoptera!), Bate in: Ann. nat. 
Hist., ser. 2 v.19 p. 139 | 1862 Westwoodilla, Bate, Cat. Amphip. Brit. Mus., p.102 | 
1871 Halimedon (part.). A. Boeck in: Forh. Selsk. Christian., 1870 p.169 | 1892 H., 
G. ©. Sars, Crust. Norway, v.1 p. 8326 | 1893 H. (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 533. 


Head with frontal process ending in acute rostrum, usually short. 
Side-plates of moderate size, 4! with lower hind corner not produced, 
narrower than 5". Eyes contiguous on frontal process. Antenna 1 shorter 
than antenna 2, flagellum of antenna 2 in C very elongate. Upper lip with 
angular sides. Lower lip, inner lobes well defined. Mandible strong, eutting 
edge indistinetly dentate, molar well defined, palp slender, 24 joint longest, 
much ceurved. Maxilla 1, outer plate carrying 8 spines (Schneider). Maxillipeds, 
inner plates rather short, outer reaching apex of 24 joint of moderate-sized 
palp. Gmnathopods 1 and 2 nearly alike, rather feeble, 5t" joint long, ending in 
short setose expansion, 6% rather small, oblong oval. Peraeopods 1—5, 
uropods 1—3 and telson as in Monoculodes (p. 258). 


5 species. 


Synopsis of species: 


1 Frontal process deflexed — 2. 
- 1 Frontal process horizontal — 4. 


9 f Rostral apex delezed .. 2... ..... 1. W. brevicalcar . p.249 
\ Rostral apex not deflexed — 3. , 
Eyes oval, of moderate size...» 2 2.2.2 .. 2. W.caecula . . . p.250 
Eyes rounded, unusually large. . . . 2... 8. W. megalops . . p.250 
Eyes not prominent, at centre of tapering frontal 
ER IE RE EEE 4. W. acutifrons . . p.251 
Eyes prominent, at distal end of elongate frontal 
en ee 5. W. rectirostris . p.251 


1. W. breviealear (Goes) 1866 Oediceros b., Go@s in: Öfv. Ak. Förh., v.22 
p-527 t.39 1.22 | 1871 Halimedon b., A. Boeck in: Forh. Selsk. Christian., 1870 p.171| 
1876 H.%., A. Boeck, Skand. Arkt. Amphip., v.2 p.286 t.15 f.3| 1883 H.b., J.S. 
Schneider in: Tromse Mus. Aarsh., ©.6 p.37 t.2 f£.11 | 1892 H.b., G. O. Sars, Crust. 
Norway, v.l p.351 t.116 f.3 | 1895 H.b. (part.), A. DelleValle in: F. Fl. Neapel, 
v.20 p. 539. 


Rather short and stout. Head frontal process short, evenly curved, the 
acute deflexed rostrum reaching a little beyond middle of 1° joint of antenna 1. 
Side-plate 1 little expanded distally. Eyes of moderate size, rounded oval, 
bright red, at base of frontal process. Antenna 1 in Q reaching beyond pedunele 
of antenna 2, 24 joint shorter than 1°, flagellum a little shorter than peduncle, 
7-jointed. Antenna 2, ultimate joint of peduncle shorter than penultimate, 
flagellum about as long as the 2 combined. Gnathopod 1, 5tk joint not 
much longer than its width at the somewhat projecting process, 6! joint 


250 Westwoodilla 


as long as 5tk, oval, palm oblique, rather longer than hind margin. Gnatho- 
pod 2 more elongate, process of 5'k joint little projecting, palm of 6'% 
scarcely longer than hind margin. Peraeopods 1—4, finger nearly as long 
as the narrow linear 6*" joint; in peraeopods 3 and 4, 24 joint oval, with long 
setae projecting from within most of the expansion. Peraeopod 5, 24 joint 
piriform, 4%, 5th and 6th subequal. Uropod 3, rami narrow, longer than 
peduncle. Telson decidedly longer than broad, quadrangular, apically truncate, 
armed with spinules. Colour whitish, tinged with yellow. L. © 6 mm. 


Arctie Ocean (Iceland, Greenland, Spitzbergen; Norway, depth 9—55 m). 


2. W. caecula (Bate) 1856 Westwoodea caeculus (nom. nud.), Bate in: Rep. 
Brit. Ass., Meet.25 p.58 | 1857 Westwoodia caecula, Bate in: Ann. nat. Hist., ser.2 v.19 
p. 140 | 1862 Westwoodilla c. + W. hyalina, Bate, Cat. Amphip. Brit. Mus., p. 102 t.16 
f.5; p.103 t.17 f.5 | 1862 Oediceros parvimanus, Bate & Westwood, Brit. sess. Crust.; 
v.1 p.161 f. | 1889 Halimedon p., A. M. Norman in: Ann. nat. Hist.,. ser.6 v.3 p.455 
t.20 £.10—14 | 1893 H.p., A. Della Valle in: F. Fl. Neapel, v.20 p.539 t.58 f.38—40 | 
1871 H. molleri, A. Boeck in: Forh. Selsk. Christian., 1870 p.169 | 1876 H. mülleri, 
A. Boeck, Skand. Arkt. Amphip., e.2 p.281 t.13 f.5 | 1883 H. m., J. S. Schneider in: 
Tromss Mus. Aarsh., v.6 p.33 t.3 £.17 | 1892 H. m., G. O0. Sars, Crust. Norway, v1 
p. 327 t. 115. 


Rather slender, but tumid anteriorly. Frontal process rather large, strongly 
arched distally, but the small rostral apex projected horizontally. Side-plate 1 
much expanded and produced forward, 5" nearly as deep as 4h. Eyes of moderate 
size, oval, light red, at distal end of frontal process. Antenna 1 in 9 
little longer than peduncle of antenna 2, 24 joint rather longer than 1°, flagellum 
as long as 24 and 39 combined, 10-jointed. Antenna 1 in JS, 1° and 24 joints _ 
equal, flagellum longer than peduncle, with 14 joints, first 10 thiekened, hirsute. 
Antenna 2in O, ultimate joint of pedunele longer than penultimate, both densely 
setose, together longer than flagellum. Antenna 2 in J, peduncle nearly bare, 
flagellum very long, filiform. Gmathopod 1 rather feeble, process of 5t" joint 
broadly rounded and setose, 6! joint subequal to 5%, oblong oval, palm ill- 
defined, nearly twice as long as hind margin. Gnathopod 2 similar to gnatho- 
pod 1, but longer and more slender. Peraeopods 1—4 densely setose, the 
finger about as long as 6" joint, the latter in peraeopods 1 and 2 subfusiform, 
with dense tufts on distal half of front margin. Peraeopod 5, 24 joint 
rounded oval, 4!" and 5!" equal, 6% rather longer than either. Uropod 3, 
rami spinulose, narrowly lanceolate, longer than peduncle. Telson oval, apex 
broadly rounded, carrying several setules. Colour pellueid whitish, lightly 
tinged with red; ova orange-coloured. L. 8 mm. 

ArcticOcean, North-Atlantie, North-Sea and Skagerrak (Norway, depth 36—-376m; 
France, Great Britain; West Greenland, depth 47—400 m); Kattegat. 


3. W. megalops (0. Sars) 1882 Halimedon m., G. O. Sars in: Forh. Selsk. 
Christian., nr.18 p.96 t.4 f.9,9a | 1883 H.m., J. S. Schneider in: Tromse Mus. Aarsh., 
v.6 p.38 t.2 f.9 | 1892 H. m., G. O. Sars, Crust. Norway, v.1 p.330 t.116 f.2 | 1893 
H. brevicalcar (part.), A. Della Valle in: F. Fl. Neapel, v.20°p. 589. 


Very tumid anteriorly. Frontal process broad, strongly arched, the small 
rostral apex jutting out nearly to end of 1° joint of antenna 1. Side-plate 1 a 
little expanded distally, 5!" deeidedly less deep than 4%. Eyes unusually large, 
rounded, prominent, dark red, occupying most of frontal process. Antenna 1 
in © short, little longer than peduncle of antenna 2, 1° joint as long as 24 and 
3% combined, flagellum shorter than peduncele, 5-jointed. Antenna 2, ultimate 
and penultimate joints of peduncle subequal, flagellum nearly aslong as peduncle. 


Westwoodilla 251 


Maxilla 1, outer plate with 8 spines, 24 joint of palp narrower than 1s 
(Schneider). Gnathopods 1 and 2, 5% joint distally widened, alike in both pairs, 
6% joint oval, longer than 5% (Sars) or equal to it (Schneider), palm in 
gnathopod 1 much longer than hind margin, in gnathopod 2 little longer. 
Peraeopods 1—4, 6!" joint narrow linear, sparingly setose, finger about as 
long. Peraeopod 5, 24 joint broad, obliquely quadrate, 4 and 5th subequal, 
6th rather longer. Uropod 3, rami a little longer than peduncle, each carrying 
2 spinules. Telson quadrate, nearly as broad as long, slightly narrowed 
at truncate apex, which has 2 setules. Colour yellowish orange mottled 
with reddish brown; antennae banded with orange. L. © 6 mm. 


Arctie Ocean and North-Atlantie (North-Norway). Depth 36—55 m. 


4. W. acutifrons (0. Sars) 1892 Halimedon a., G. O.Sars, Crust. Norway, v.1 
p.329 1.116 £.1. 


Rather slender. Frontal process rather long, little arched, gradually 
tapering to an acute horizontally projected rostral apex reaching beyond 
1°t joint of, antenna 1. Side-plate 1 much expanded and produced forward, 
5tk Jess deep than 4th, Eyes oblong oval, light red, covering centre of 
frontal process. Antenna 1 in O, 24 joint longer than Ist, flagellum shorter 
than 24 and 34 combined, 10-jointed. Antenna 2, ultimate and EEE, 
joints of pedunele subequal, flagellum less than the 2 combined. Gnathopods 1 
and 2 feeble. Gnathopod 1, 5t& joint distally much expanded, 6tk rather longer, 
more than twice as long as broad, palm very oblique, longer than hind margin. 
Gnathopod 2, 5t" joint less expanded, 6'h narrower than in gnathopod 1, 
equal in length to 5% joint, palm scarcely longer than hind margin. Peraeo- 
pods 1 and 2, 6tk joint slightly expanded at setose distal end, finger nearly as 
long. Peraeopods 3 and 4, finger longer than 6" joint. Peraeopod 5 very long, 
23 joint broad above, 5th and 6th joints subequal, longer than 4%, Uropod 3, 
rami narrow, spinuliferous, longer than peduncle. Telson oval, apex not 
very broadly rounded. Colour whitish, faintly tinged with yellow; ova rose- 
coloured. ‘'L. Q 8 mm. } 


North-Atlantie (Apelvaer [Namdal], Trondhjemsfjord). Depth 90—270 m. 


5. W. rectirostris (Della Valle) . 1893 Halimedon r., A. Della Valle in: F. Fl. 
Neapel, v.20 p. 587 1.4 £.6; 1.33 £.1—15. 


Rather slender. Frontal process elongate, horizontally projected. Side- 
plate 1 greatly expanded distally and produced forward, 5'% much broader 
than 4" and nearly as deep. Eyes small, rounded, prominent, bright vermilion, 
at apex of frontal process, leaving a very minute rostral point (a single eye is 
represented on t. 33, with no dividing line). Antenna 1 in Oo , 2 joint as long as 
1°t, 39 more than half length of 24, flagellum shorter than peduncle, 10-jointed. 
Antenna 2, ultimate and penultimate joints of peduncle subequal, flagellum in O 
as long as the 2 combined, 12-jointed. Gnathopods 1 and 2 said to be almost 
exactly alike, 5! joint triangular, as long as 6®%, hinder distal angle dilated, 
not produced, 6! joint almond-shaped. In the figures the angle of 5% joint 
is as usual more broadly dilated in gnathopod 1 than in gnathopod 2, and 
the palm of 6 joint is much longer than hind margin in gnathopod 1, 
and little longer than it in gnathopod 2, but the 6! joint of gnathopod 1 is 
2'/, times as long as broad, and in gnathopod 2 only twice. Peraeopods 1, 2 
and 4, finger subequal to 6" joint, in peraeopod 3 longer than it. Peraeopod 5, 
22 joint broad, 4 longer than 5tb or 6t, finger shorter than 6'k. Uropod 3, 


252 Westwoodilla, Carolobatea, Oediceropsis 


rami longer than peduncle. Telson longer than broad, sides insinuatg, 
distal margin flatly rounded. Colour orange-yellow blotehed with lemon- 
vellow. L. 5—6 mm. 


Gulf of Naples. In muddy sand, depth 12—20 m. 


11. Gen. Carolobatea Stebb. 


1899 Carolobatea (Sp. typ.: Halimedon schneideri), T. Stebbing in: Ann. nat. 
Hist., ser. 7 v.4 p. 208. 


Frontal process of head apically subaeute. Side-plate 1 distally expanded, 
4th much deeper than the rest, 5!" nearly as broad as 4. Eyes contiguous, 
on frontal process. Antenna 1 in Q shorter than antenna 2, flagellum in both 
many-jointed. Upper lip with sides angular. Lower lip with inner lobes 
separate. Mandible, cutting edge bluntly dentate, molar rather weak, 24 joint 
of palp very slightly bent. Maxilla 1, outer plate with 9 spines; maxilla 2, 
inner plate the broader. Maxillipeds, inner plates small, not reaching apex 
of 18 joint of palp, outer plates not nearly reaching apex of distally expanded 
24 joint ofpalp. Gnathopods 1 and 2, 5% joint subequal to 6*, distally widened 
and slightly produced, 6% oblong, a little widened distally, palm well defined, 
very slightly oblique, much shorter than hind margin. Peraeopods 1—4, 
finger narrowly boat-shaped, and as in gnathopods 1 and 2 having a membranous 
cap over the tip; in 1%, 24 and 4tk pairs finger as long as 6!" joint. Uropod 3, 
rami subequal to peduncle. Telson rather longer than broad. 


l species. 


1. C. schneideri (Stebb.) 1888 Halimedon s., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.839 t.59 | 1899 H.s., Carolobatea sp. typ., T. Stebbing in: Ann, 
nat, Hist., ser.7 v.4 p.209 | 1893 H. brevicalcar (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p.589 t.58 f.4l, 42. 


. Frontal process deflexed, reaching end of 1° joint of antenna 1. Eyes 
dark, elongate, widened distally (apparently not always persistent in alcohol). 
Antenna lin Q, 24 joint rather longer than 1%, flagellum shorter than peduncle, 
17-jointed. Antenna 2, ultimate joint of pedunecle shorter than penultimate, 
flagellum shorter than the 2 combined, 24-jointed. Gnathopod 2 longer and more 
slender than gnathopod 1, the palm a little more oblique, but in both 
defined by a well marked angle with palmar spine. ‘Peraeopods 1—4, 6tlı 
joint with brush of setae on lower half of the convex margin; in peraeo- 
pods 3 and 4, hind margin of 24 joint sinuous. Peraeopod 5 imperfeet, but 
with the family character indicated. Telson narrowing distally, apical margin 
very slightly insinuate. L. © (from front of head to end of outstretched 
uropod) 13 mm. 


Southern Indian Ocean (Kerguelen Island). 


12. Gen. Oediceropsis Lillj. 


1865 Oediceropsis (Sp. un.: ©. brevicornis), W. Lilljeborg in : N. Acta Soc. Upsal., 
ser.8 v.6 nr. 1 p.18, 19 | 1871 O., A. Boeck in: Forh, Selsk. Christian., 1870 p. 174 
1892 O., G. O. Sars, Crust. Norway, v.1 p. 324. 


Head without frontal process, but narrowed anteriorly. Side-plates 1—4 
rather large, 1° expanded distally, 4!" excavate behind, 5tt small. Eyes 
lateral. Antenna 1 very small. Antenna 2 large, penultimate joint of peduncle 


Oediceropsis, Acanthostepheia 5 ‚253 


very large, flagellum of many short calceoliferous joints both in Q and GC. 
Upper lip with margin evenly convex. Mandibular palp elongate. Maxilla 2, 
inner plate much wider than outer. Plates of maxillipeds rather broad in 
proportion to length. Gnathopods 1 and 2, 5" joint short with rather small 


- setose lobe, 6" long ovate, palm much longer than hind margin. Peraeo- 


pods 1 and 2 feeble. Peraeopods 3 and 4 Strong. Uropod 3, rami longer 
than peduncle. Telson very small. 


l speeies. 


1. O. brevicornis Lillj. 1865 O. b., W. Lilljeborg in: N. Acta Soc. Upsal., 
ser.8 e.6 nr.1 p.19 | 1876 O.b., A. Boeck, Skand. Arkt. Amphip., v.2 p. 297 t.13 £.2| 
1892 O.b., G. O. Sars, Crust. Norway, v.1 p.325 t.114 | 1893 Oediceros b., A. Della 
Valle in: F. Fl. Neapel, v.20 p. 543 t.58 f. 50—52. 


Head with minute rostrum and sinuous margin on each side below it. 
Side-plate 1 densely setose, 4% very broad distally. Eyes rounded triangular, 
light red, no distinct lenses. Antenna 1 only reaching middle of penultimate 
joint of peduncle of antenna 2, 1° joint longer than 24, flagellum shorter than 
peduncle, 10-jointed. Antenna 2, penultimate joint of peduncle with conspieuous 
spine at apex, ultimate only about half as long, with 5 large spines, flagellum 
shorter than peduncle, very flexible. Mandibular palp nearly twice as long as 
trunk of mandible. Gmathopods 1 and 2, palm nearly 4 times as long as hind 
margin, slightly defined, set with setae and spinules; palm and finger rather 
longer in gnathopod 2. Peraeopods 1—4 very setose, finger slender, long. 
Peraeopods 1 and 2, 5! joint longer than 4! or 6, Peraeopods 3 and 4, 
5th joint shorter than 4; peraeopod 4, 6tk joint and finger elongate. 
Peraeopod 5, 24 joint expanded, tufts of spinules on others. Uropod 3 not 
reaching beyond-the others. Telson oval quadrangular., Colour pale flesh- 
tinge, pellueid. L. © 11 mm. 

North-Atlantie and Arctic Ocean (West-Norway, to Lofoten Islands). Depth 
94—-564 m. 


13. Gen. Acanthostepheia Boeck 


1871 Acanthostepheia (Sp. un.: A. malmgreni), A. Boeck in: Forh:. Selsk. Christian., 
1870 p.163 | 1876 A., A. Boeck, Skand. Arkt. Amphip., v.2 p.262 | 1894 A., T. Stebbing 
in: Bijdr. Dierk., v.17 p.24 | 1873 Acanthostephia, E. v. Martens in: Zool. Rec., 9.8 p.190. 


Carinate, peraeon broad, pleon compressed. Rostrum long, tapering, 
earinate, about reaching apex of 1° joint of antenna 1. Side-plate 1 distally 
expanded, 5t" as large as the 4th, Eyes separated by carina of head, large, 
oval or reniform, prominent. Antenna 1 shorter than antenna 2, 24 joint 
shorter than 1%. Mouth-parts nearly as in Monoculodes (p. 258). Gnatho- 
pods 1 and 2 similar, 5% joint rather ‚short, with prominent round-ended 
process, 6" Jarge oval, the oblique palm much longer than hind margin, finger 
as long as palm. Peraeopods 1 and 2, finger small. Peraeopods 3 and 4, 
finger rather large, lanceolate. Uropod 3, rami not longer than pedunele. 
Telson short, quadrate. 


2 species accepted, 1 doubtful. 


Synopsis of accepted species: 


Eyes divergent . ..... . DE RE a es 1. A. malmgreni . p.254 
N a ae 2. A.pulchra . . . p. 254 


254 Acanthostepheia, Aceroides 


1. A. malmgreni (Goes) 1866 Amphithonotus m., Goes in: Öfv. Ak. Förh., 
v.22 p.526 t.39 f.17 | 1871 Acanthostepheia m., A. Boeck in: Forh. Selsk. Christian. 
1870 p.163 | 1876 A. m., A. Boeck, Skand. Arkt. Amphip., v.2 p.263 | 1894 A. m., 
T. Stebbing in: Bijdr. Dierk., v.17 p.24 | 1887 A. malmgreni, H.J. Hansen in: Vid. 
Meddel., ser. 4 v.9 p. 104 | 1893 Oediceros m. (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p. 544 t.58 f.55. 

Head, rostrum not always reaching end of 1° joint of antenna 1, 
lateral angles acute, carina not quite extending to hind margin. Peraeon 
segments strongly ridged transversely, carina rudimentary on first 5, on 7th 
and on pleon segments 1—4 longitudinally bidentate. Postero-lateral angles of 
peraeon segments 5—7 and pleon segments 1—3 acute, intermediate ridges on 
the latter. Side-plates 5 and 6 with 2 acute lobes, 7th with one acute lobe. Eyes 
reniform, diverging backward from base of rostrum. Antenna 1, 1° joint very 
long, 24 rather shorter, flagellum subequal to peduncle, 40-jointed. Antenna 2, 
ultimate and penultimate joints of peduncle long, subequal. Gnathopod 2, process 
of 5b joint rather longer and narrower, and 6*" joint rather longer than in 
gnathopod 1. Peraeopods 1—5 not very hirsute, finger shorter than 6! joint in 
peraeopods 1 and 2, longer than it in peraeopods 3 and 4. Peraeopod 5, 24 joint 
longitudinally carinate, 5tR and 6th joints much longer than 4b, 5tk a little 
longer than 6%. Uropod 3, peduncle carinate, decidedly longer than rami. 
Telson little longer than broad, distally a little emarginate. Colour dull 
yellow, dorsally red. L. sometimes 45 mm. 

Arctie Ocean (Spitzbergen, Franz Joseph Land, Siberia, Barents Sea, Kara Sea, 
Greenland). Depth 10-300 m. 


2. A. pulchra Miers 1881 A.p., Miers in: Ann. nat. Hist., ser.5 ©.7 p.47 t.7 
£.1,2 | 1894 A.p., T. Stebbing in: Bijdr. Dierk, v.17 p.25 | 1882 Acanthostephia 
malmgreni (err., non Amphithonotus m. Goes 1866!), Stuxberg in: Vega-Exp., v.1 p.724 
f. (no description) | 1898 Oediceros malmgrenii (part.), A. Della Valle in: F. Fl. Neapel 
2.20 p. 544. 

Head, rostrum reaching fully to or beyond apex of 1° joint of antenna 1, 
lateral angles acute, but almost quadrate, carina not quite extending to 
hind margin. Ridges and carina of peraeon and pleon similar to those in 
A. malmgreni, but far less strongly developed, carina of pleon segment 3 
scarcely bidentate. Postero-lateral angles of peraeon segments 5—7 and 
pleon segments 1—3 rounded. Side-plates 5 and 6 with rounded lobes, the 
hinder produced much below the front one. Eyes oval, parallel. Antenna 1 
shorter than in A. malmgreni, 24 joint considerably shorter than 1°, flagellum 
about 20-jointed. Antenna 2, ultimate joint of pedunele considerably longer than 
penultimate. Peraeopods 1—4, finger not longer than 6!" joint. Peraeopod 5, 
24 joint not distinetly carinate, 5t" joint longer than 4h, 6th Jonger than 5, 
Uropod 3, rami nearly as long as peduncle. Telson as in A. malmgreni. 
L. 37 mm. 

Arctic Ocean (Franz Jöseph Land, Siberia). Depth 6--192 m. 


A. behringiensis (Lockington) 1877 Oedicerus b., Lockington in: P. Calif. Ae., 
v.7 p.47 | 1893 O.b., A. Della Valle in: F. Fl. Neapel, v.20 p. 556. : 


Perhaps identical with A. pulchra. L. about 32 mm. 
North of Behring Strait (West Alaska). 


14. Gen. Aceroides 0. Sars 


1892 Aceroides, Aceropsis (Sp. un.: A. latipes) (non Aceropsis Stuxberg 1880, 
nom. nud.), G. O. Sars, Crust. Norway, v.1 p. 340. 


fs ale Sa a 4 ua 


Aceroides, Bathymedon .. 255 


Head with small but distinet rostrum. Side-plates not deep, 1° not 
expanded. Eyes absent. Antennal in O longer than antenna 2, peduncle rather 
short, flagellum much longer. Upper lip broad, with margin scarcely insinuate. 
Lower lip with inner lobes separate. Mandible less strong than in Arrhis (p. 248), 
palp straight. Maxillae 1 and 2, maxillipeds and gnathopods 1 and 2 as in that 
genus. Peraeopods 1 and 2 (Fig. 63) large, 4" to 7!" joints much expanded. 
Peraeopods 3 and 4 much smaller, 29 joint little expanded, finger slender. 
Peraeopod 5 characteristic of the family. Uropods 1—3 and telson normal. 

1 species. 

1. A. latipes (0. Sars) 1866 Oediceros obtusus var., Goes in: Öfv. Ak. Förh., 
v.22 p.527, 536 t.40 f.24, 24° | 1882 Halicreion latipes, G. O. Sars in: Forh. Selsk. 
Christian., nr. 18 p.97 t.4 f£.10 | 1883 H.?l., J.S. Schneider in: Tromse Mus. Aarsh., 
v.6 p.43 | 1892 & 98 Aceropsis l., Aceroides l., G. O. Sars, Crust. Norway, v.1 t.120 
f.2; p.341 | 1887 Aceros distinguendus, H. J. Hansen in: Vid. Meddel., ser.4 v.9 p.118 
t.4 f.8 | 1893 Halimedon d., A. Della Valle in: F, Fl. Neapel, v.20 p. 916. 

Neither very slender nor in front very tumid. Rostrum very small, 
acute. Side-plate 1 obliquely quadrate, 3% slightly emarginate below, subequal 
to 4th, 5th —_7th proad. Antenna 1 in Oo, 1% joint 
as long as 24 and 32 combined, flagellum nearly twice 
as long as peduncle, with 12 joints, each with 2 long 
setae. Antenna 2 in Q much shorter, ultimate joint 
of peduncle shorter than penultimate, flagellum as 
long as the 2 combined. Gmnathopod 1, 5 joint 
shorter than 6", process rather large, pointed obli- 
quely forward, 6 joint oblong oval widening to 
oblique palm, which is longer than hind margin. 
Gnathopod 2, 5" joint with very narrow process, 
6th elongate, palm shorter than hind margin. Peraeo- 
pods 1 and 2 (Fig. 63) very large and powerful, 
4th joint much expanded distally, a curved ridge 
on the outside fringed with long setae, 5!" joint 
short, heart shaped, setose, 6‘ expanded distally, 


finger large, foliaceous. Peraeopods 3 and 4 much Fig. 63. A. latipes. 


Peraeopod 1. 
more feebly eonstructed, subequal to one another, ratter 6.0. Sars.] 


24 joint not oval, finger slender. Peraeopod 5, 

24 joint large, oval, 5tk much shorter than 4 or 6%. Uropod 3, rami 
with a few spinules, narrowly lanceolate, longer than peduncle. Telson 
nearly square. L. © (young?) 5 mm. 

Arctic Ocean (Spitzbergen; Kara Sea; Greenland; Varangerfjord . [Norway], 
depth 144—188 m). 

15. Gen. Bathymedon 0. Sars 

1871 Halimedon (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p. 169 | 1892 
Bathymedon, G. O. Sars, Crust. Norway, v.1 p. 332. 

Near to Westwoodilla (p. 249). Front of head produced to a short 
rostrum, lateral angles deep, quadrate. Side-plates not very large, sparingly 
setose. Eyes poorly developed or wanting. Mandible powerful, 24 joint 
of palp only a little or not arcuate. Maxillipeds, outer plates rather large, 
though sometimes not reaching apex of 24 joint of palp. Gnathopods 1 and 2, 
5b joint usually long, with or without distal process, 6tk joint usually oval, 
not very large, palm oblique. Gnathopod 2 longer and more slender than 
gnathopod 1. Other characters nearly as in Westwoodilla (p. 249). 


4 species. 


256 


Bathymedon 


Synopsis of species: 


ıJ 


Gnathopod 2, 5th joint well expanded distally . . 1. B. obtusifrons . p.256 


\ Gnathopod 2, 5th joint scarcely at all expanded — 2. 


'f Gnathopod 2, 5th joint much shorter than 6th . . 2. B. saussurei . . p.256 
. | Gnathopod 2, 5th joint longer than 6th — 8. 

3 | Eyes represented by white pigment .......- 3. B. longimanus . p.257 

Eyes entirely wanting . . » » 2: 22.2.2 .2 2... 4. B. acutifrons . . p. 257 


1. B. obtusifrons (H.J. Hansen) ?1883 Halimedon sayssurei (err., non A. Boeck 
1871?), J. S. Schneider in: Tromse Mus. Aarsh., v.6 p.35 t.2 f.13 | 1887 H. obtusifrons, 
H. J. Hansen in: Vid. Meddel., ser.4 v.9 p.116 t.5 f.1—le | 1895 H.o., A. Della 
Valle in: F. Fl. Neapel, v.20 p.536 t.58 f.30—32 | 1892 Bathymedon o., G.O. Sars, 
Crust. Norway, v.1 p.336 t.118 f.2. 


Body tumid 


anteriorly. Rostrum very short and blunt. Side-plate 1 


expanded. Eyes imperfeetly developed, rounded, light red, dorsal behind rostrum. 
Antenna 1 in 9 a little longer than peduncle of antenna 2, 1° joint longer than 24, 

flagellum longer than pedunele. Antenna 2, ultimate and penultimate joints 
of peduncle subequal, together as long as flagellum. Divergent setae on 


- 24 joint 


-- — —. 7% joint 


Fig. 64. 
B. saussurei. 
Peraeopod 5. 
[After 
@G. 0. Sars.] 


apices of joints of peduncle in antennae 1 and 2. Upper lip, 
sides obtusely angled. Mandible, 24 joint of palp straight. 
Maxillipeds, outer plates reaching end of palp’s 24 joint. 
Gnathopod 1, 5" joint not longer than 6%, distally expanded 
into a much projecting narrow lobe, 6tk rather broad at 
pretty well defined palm. Gnathopod 2 much longer than 
gnathopod 1, 5tk joint similarly produced, 6% long oval, 
palm twice as long as hind margin with very long palmar 
spine, finger very long, curved, serrate within. Peraeo- 
pods 1—4 strongly built, setose, finger lanceolate, short. 
Peraeopod 5, 5th joint rather shorter than 4 or 6, 
Uropod 3, rami narrowly lanceolate, spinuliferous, nearly 
twice length of peduncle. Telson rather longer than broad, 
narrowed distally, apical margin truncate. Colour whitish 
tinged with yellowish; ova orange-coloured. L. © 5 mm. 

Arctie Ocean (Greenland; Tromsö, Varangerfjord, depth 188 m). 


2 B. saussurei (Boeck) 1871 Halimedon s., A. Boeck in: 
Forh. Selsk. Christian., 1870 p.170 | 1876 H.s., A. Boeck, Skand. 
Arkt. Amphip., v.2 p.283 t.15 f.1 | 1893 H.s., A. Della Valle 
in: F. Fl. Neapel, v.20 p.535 t.58 f. 28,29 | 1892 Bathymeldon s., 
G. ©. Sars, Crust. Norway. v.1 p. 335 t.118 £.1. 


Body slender. Rostrum acute, reaching a little 
beyond middle of 1° joint of antenna 1. Side-plate 1 distally 
expanded, 5!" hroad. Eyes represented by irregular whitish 
pigment not extending beyond the head. Antenna lin oO, 
24 joint considerably longer than 1°, flagellum as long as 
peduncle, 14-jointed. Antenna 2 in O not longer than an- 
tenna 1, ultimate and penultimate joints of pedunele nearly 
equal, together as long as flagellum. Gmathopod 1, 5t" joint 
narrowly produced a little forwards, 6!" joint subequal to 5th, 
oblong oval, palm subequal to hind margin. Gmathopod 2 
slender and feeble, 5" joint with very slight process, 6!" much 
longer than 5tt, almost linear, palm short and ill-defined. 


Peraeopods 1 and 2, finger long and slender. Peraeopod 3 much shorter than 
peraeopod 4, finger as long as 6" joint. Peraeopod 4, 6!" joint much longer 


5 
# 
2 
1 


Bathymedon, Monoeulopsis 257 


than the long finger. Peraeopod 5 (Fig. 64) slender, unusually long, very 
fragile, 24 joint broad oval, 5t® longer than 6th, 6th than Ah, Uropod 3, 
pedunele longer than 'rami, inner ramus with dense row of minute spinules 
on inner margin. Telson small, as broad as long, rounded quadrangular, 
apical border insinuate. Colour pale yellowish, peraeon transversely banded 
with faint whitish stripes. L. © 5 mm. 

Skagerrak, North-Sea and North-Atlantie (Christianiafjord to Trondhjemsfjord). 
Depth 94—564 m. 


3. B. longimanus (Boeck) 1871 Halimedon1., A. Boeck in: Forh. Selsk. Christian., 
1870 p.170 | 1876 H.1., A. Boeck, Skand. Arkt. Amphip., e.2 p.284 t.13 £.6 | 1883 
H.|., J. S. Schneider in: Tromse Mus. Aarsh., e.6 p.34 t.3 f.16 | 1893 H.1., A. Della 
Valle in: F. Fl. Neapel, v.20 p.538 t.58 f.36, 37 | 1892 Bathymedon I., G. ©. Sars, 
Crust. Norway, v.1 p.333 t. 117. 

Body rather slender and eompressed, thin-skinned. Small acute rostrum 
reaching about middle of 1° joint of antenna 1. 1° side-plate distally ex- 
panded and produced, 5t® broad. Eyes represented by chalky white pigment 


irregularly distributed within head and front of peraeon. Antenna 1, 24 joint 


longer than 1°, flagellum in © short, with 10 joints, in GC longer, with 
22 setose joints. Antenna 2 in O, ultimate and penultimate joints of peduncle 
subequal, together as long as flagellum, in JS ultimate rather longer than 
penultimate, flagellum filiform, elongate. Mandible, 24 joint of palp slightly 
arcuate. Maxillipeds, outer plates not reaching apex of 24 joint of palp. . 
Gnathopod 1, 5tk joint with short broad distal expansion, 6% rather shorter, 


. oval, palm longer than hind margin, defined by a long spine. Gnathopod 2 


much more slender, 5t% joint scarcely at all expanded, elongate, 6 joint much 
shorter, palm twice as long as hind margin, defined by a spine. Peraeo- 
pods 1—4 setose, finger longer in peraeopods 1 and 2 than jn peraeopods 3 
and 4.. Peraeopod 5, 24 joint large, piriform, 5t shorter than 4", 4th than 6", 
Uropod 3, peduncle stout, rami rather longer, spinuliferous. Telson scarcely 
as long as breadth at base, narrowing to somewhat emarginate apical border. 
Colour pale yellowish; ova vellowish. L. 6 mm. 

Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (South- and West-Norway 
northward to Lofoten Isles). Depth 94—376 m. 


4. B. acutifrons Bonnier 1896 B. a., J. Bonnier in: Ann. Univ. Lyon, v. 26 
p. 643 t. 38 f.2. 

Nearly akin to B. longimanus. Rostrum very small, acute. Side-plate 1 
distally expanded and produced, 5!" broad. Eyes and ocular pigment entirely 
wanting. Antenna 1, 1° and 24 joints equal, 39 very short, flagellum multi- 
articulate. Antenna 2 in © much longer, ultimate and penultimate joints 
of peduncle subequal, long. Mandible, 2? joint of palp not arcuate. Maxillipeds, 
outer plates not reaching apex of 2a joint of palp. Gnathopods 1 and 2 as 
in B. longimanus. Peraeopods 1—5 also nearly as in that species, but differing 
by having in peraeopods 1—4 a rather bluntly lanceolate, instead of an 
arcuate finger. Telson quadrangular oval, with a couple of long setae near 


the lower angles, apical margin slightly concave. L. d 5 mm. 


Bay of Biscay. Depth 950 m. 


16. Gen. Monoculopsis 0. Sars 


1892 Monoculopsis (Sp. un.: M. longicornis), G. O. Sars, Crdsk Norway, v.1 p.310. 
Head produced to a short obtuse rostrum. Side-plates 4 and 5 in O very 

large. Eyes contiguous within the front of head. Antenna 1 in Q longer than 
Das Tierreich. 21.Lief.: T.R. R. Stebbing, Amphipoda I. 17 


258 Monoeulopsis, Monoculodes 


antenna 2, 39 joint long, flagellum short. Upper lip rounded quadrangular 
Lower lip with inner lobes separate. Mandible, molar weil developed, palp 
slender, 34 joint shorter than 24. Gmathopod 1, process of 5th joint very 
. large, projeeting. Gnathopod 2 slender, process of 5! joint long, slender, 
6t elongate, tapering distally. Peraeopods 1—4 short. stout, very hirsute. 
Uropods and telson as in Monoculodes (p. 258). 


1 species. 


1. M. longicornis (Boeck) 1871 Monoculodes I, A. Boeck in: Forh. Selsk. 
Christian., 1870 p.165 | 1876 M.1., A. Boeck, Skand. Arkt. Amphip., 0.2: p. 273 t.16 
f.2 | 1883 M.1., J. S. Schneider in: Tromse Mus. Aarsh., v.6 p.24 t.1 £.7; t.3 f.18, 23 | 
1892 Monoculopsis l., G. ©. Sars, Crust. Norway, v.1 p.311 t.110 f£.1 | 1893. Oediceros 
affinis (part.), A. Della Valle in: F. FI. Neapel, v.20 p. 548. 


Tumid in front. Head, rostrum very short, triangular, lateral corners 
subrectangular. Side-plates 1—3 small, 4th as large as 1%t—34 combined, 
5th still broader, not so deep. Eyes rounded, light red with whitish coating. 
Antennae 1 and 2 densely setose. Antenna 1, 24 joint much longer than 18%, 
34 subequal to 1%, and to 8-jointed flagellum. Antenna 2 in © a little shorter 
than antenna 1, ultimate joint of pedunele longer than penultimate, flagellum 
shorter than those 2 combined. Gmnathopod 1 not strong, process of 5" joint 
narrowly linguiform, reaching beyond hind margin of oblong oval 6%, which 
has palm very oblique, subequal to hind margin. Gnathopod 2 long, slender, 
process of 5!" joint stiliform, reaching beyond palm, 6! joint nearly 5 times 
as long as broad, distally narrowed, palm small, oblique, well defined. 
Peraeopods 1 and 2, 4% joint rather expanded, as long as 5tb and 6" combined, 
finger small. Peraeopods 3 and 4 not long, 24 joint much expanded, 4!" broad, 
finger short and broad. Peraeopod 5 long, 24 joint broadly oval, 4!" and 5th sub- 
equal, 6% and 7t% subequal. Uropod 3, rami narrowly lanceolate, spinuli- 
ferous, a little longer than pedunele Telson. little longer than broad, 
slightly narrowed to slightly insinuate apical margin. Colour whitish, pale 
brownish violet on back. L. O0 9 mm. 


Arctic Ocean, North-Atlantie and North-Sea (Haugesund to Vadsö [Norway], 
depth 18—36 m; Jan Mayen). 


17. Gen. Monoculodes Stimps. 


1853 Monoculodes (Sp. un.: M. demissus), Stimpson in: Smithson. Contr., ©. 6 
nr.d5 p.54 | 1892 M., G.O. Sars, Crust. Norway, ©.1 p.294 | 1857 Kröyera (Sp. un.: 
K. carinata), Bate in: Ann. nat. Hist., ser.2 v.19 p.140 | 1858 Kroyera, Bate in: Nat. 
Hist. Northumb., ©. 41 p. 15 | 1862 Kroyea, Bate, Cat. Amphip. Brit. Mus., t. 17 | 
1864 Kroyeria, E. Grube, Lussin, p.72 | 1871 Kroyeria, A. Boeck in: Forh. Selsk. 
Christian., 1870 p.171. 


‘ Head produced to a rostrum, which is usually deflexed, acute. Side- 
plates 4 and 5 rather large. Eyes almost always contiguous, at base of rostrum. 
Antenna I generally much shorter than antenna 2, flagellum of latter 
in © filiform. _Mandible, molar with triturating surface. Maxilla 1, with 
9 (6?, 7?) spines on outer plate. Gmathopod 1 (Fig. 65) usually shorter 
and stouter than gnathopod 2 (Fig: 66), 5th joint of latter produced into 
a long slender process. Peraeopods, uropods and telson nearly as in 
Oediceros (p. 243). 


18 species accepted, 1 obscure. 


Monoeulodes 


Synopsis of accepted species: 


Eyes separated by carina of head ..... 


ı Eyes contiguous —- 2. 


Head narrowly produced behind the eyes — 3. 


2 Head not narrowly produced behind the eyes —5. 


Antenna 1, 2d joint of pedunele much longer 
than 1st EEE II RER TE FE ER RPER 

Antenna 1, 2d joint of altaels not longer 
than 1st — 4. 


Produced part of head long . .. ... ne 
Produced part of head short... ..» - .. 


Rostrum short — 6. 
Rostrum long — 14. 


1 


or 


[e2) 


Telson a little emärginate —- 9. 


. Antenna 1 in 2, 2d joint longer than Ist... 
7 \ Antenna lin 9, 1st and 2d joints subequal — 8 
Gnathopod 2, process of 5th joint overreaching 
hind margin of 6th; pleon carinate 
Gnathopod 2, process of 5th joint not over- 
reaching hind margin of 6th; pleon smooth 


E- Frontal process abruptly deflexed — 10. 
Mi r Frontal process not abruptly deflexed — 11. 
ı Eyes not very large or prominent; side-plate 1 
mich -oroRnded.. u ae 
Eyes large, prominent; side-plate 1 little 
N 1 EEE EEE Er 


Peraeopods 1 and 2, 7th joint short — 12. 
Peraeopods 1 and 2, 7th joint rather long — 13. 


| 
| 
| 
| 
| 
N Telson transversely truncate. — 7. 
| 
| 
| 
»| 
| 


en 


1 


- 


9 Peraeopod 5, 24 joint evenly expanded . 
Peraeopod 5, 2d joint piriform . . 2.2... 


| Colouring tessellated; telson apically insinuate 12. M. tesselatus 
3 


Colouring not tessellated; telson with apex 
\ decidedly emarginate . . . 2... 2 


14 f Antenna 1, 2d joint apically tuberculate. . . 
5 \ Antenna 1, 2d joint not apically tubereulate — 15. 
’ 5 Eyes large — 16. 
4 ® | Eyes not large — 17. 
E Side-plate 1 little expanded; gnathopod 1, 
process of 5th joint broad . ». 2.2... 
Side-plate 1 much expanded; gnathopod 1, 
process of 5th joint narrow . ...... 


16 


Gnathopods 1 and 2 rather weak; telson broadly 
rounded at apex. . . .. vun... 
Gnathopods 1 and 2 rather strong; telson nar- 
a 


259 

1. M. gibbosus . . . . p.259 

2. M. hanseni - pP: 260 

3. M. longirostris . . p.260 

4. M. kröyeri . p. 261 

5. M. pallidus ..p. 261 

6. M. carinatus. . . . p.261 

7. M. griseus. .: .-... p: 262 

8. M. borealis . pP. 262 

9. M. schneideri . . . p.263 

10. M. crassirostris . . p.263 
11. M. latimanus . pP. 264 
.. p. 264 

13. M. simplex . p. 264 
14. M. tubereulatus . . p.265 
15. M. norvegicus . . . P.265 
16. M. subnudus . pP. 266 
17. M. packardi . . . . pP. 266 
18. M. tenuirostratus . p.267 


17° 


1. M. gibbosus Chevreux 1888 M.g., Cheyreux in: Bull. Soe. zool. France, 
v.13 p.4l | 1893 Oediceros affinis (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p.556 


Head with rostrum and pleon carinate. Rostrum large, evenly eurved 
with high narrow carina, shortly acuminate, reaching apex of 1° joint of, 


260 Monoeulodes 


antenna 1. Side-plate 1 expanded into a lobe in front. Pleon segments 1 and 2 
ending dorsally in a median tubercle, segment 3 with a very high gibbous 
carina. Eyes very large and prominent, oval, at the base of the rostrum, 
separated by the cephalic carina. Antennae 1 and 2 short. Antenna 1 a little 
shorter than peduncle of antenna 2, flagellum 5-jointed. Antenna 2, ultimate 
joint of peduncle much longer than penultimate. Gnathopod 1, process of 
5th joint broad, 6'% joint large, ovate, palm not defined. Gnathopod 2, process 
of 5th joint narrow, reaching beyond the hind margin of 6", which is almost 
3 times as long as broad, distally widened. Peraeopods 1 and 2 very hirsute, 
finger short. Peraeopod 5, 24 joint moderately dilated, hind margin serrate. 
Uropods 1 and 2 elongate, rami shorter than peduncle. Colour yellowish white, 
marbled with tawny red. L. © 8 mm. 


North-Atlantie (lat. 46° N., long. 7° W.). Depth 180 m. 


2. M.hanseni Stebb. 1894 M. h., T. Stebbing in: Bijdr. Dierk., v.17 p.23 t.4. 


Head, frontal process long, horizontal, lateral angles little produced, 
obtuse. Side-plate 1 distally expanded, 32 with lower margin insinuate, 4" with 
concave hind margin. Last peraeon segment with faint trace of carina. 
Pleon segments 1—3 discontinuously earinate; 1° and 24 with many adpressed 
surface spinules. Eyes contiguous, forming an oval prominence at apex of 
frontal process, leaving a very small deflexed rostral apex. Antenna 1, 1° joint 
reaching beyond cephalie process, 29 much longer, flagellum about 11-jointed. 
Antenna 2, ultimate joint of peduncle shorter than penultimate. Upper lip 
with slightly concave margin. Gmnathopod 1, 5" joint with broad process, 
scarcely reaching the palm of 6% joint, which is widest at the point where a 
palmar spine separates the oblique convex palm from the shorter concave 
hind margin. Gnathopod 2 much longer than gnathopod 1, 5 joint with 
narrow process, long, but scarcely reaching palm of 6% joint, which widens 
gradually to the palmar spine, the palm convex, much shorter than the 
faintly concave hind margin. Peraeopods 1 and 2 very hirsute, 4 joint much 
widened distally, finger smooth, curved, as long as 6!" joint. Peraeopods 3 and 4 
very like 1°t and 24, except that the 24 joint is piriform, the expansion being 
almost confined to the upper part. Peraeopod 5, 24 joint oval, other joints 
slender, with small spines. Uropods 1—3, in all peduncle longer than rami, 
in uropod 3 outer ramus rather shorter than inner. Telson small, a little 
longer than broad, sides and apex slightly insinuate, some setules on rounded 
corners of apieal margin. L. © 21 mm. 


Kara Sea (lat. 72° N. long. 65° E.; Varna, depth 104 m). 


3. M. longirostris (Go&s) 1866 Oediceros l., Go@s in: Öfv. Ak. Förh., v.22 
p.526 t.39 £.20 | 1893 O.1., A. Della Valle in: F. Fl. Neapel, v.20 p.545 t,58 f.61,62| 
1876 Monoculodes l., A. Boeck, Skand. Arkt. Amphip., ©.2 p.270 | 1883 M.1., J.S. 
Schneider in: Tromse Mus. Aarsh., v.6 p.26 t.1 £.1| 1892 M.1., G.O. Sars, Crust. 
Norway, v.1 p.306 t.108 £.3 | 1894 M.1., T. Stebbing in: Bijdr. Dierk., v.17 p. 24. 


Head, frontal process long, horizontal, and the species in general in 
close agreement with M: hanseni, but without carina, 1°t joint of antenna 1 
not reaching end of frontal process, 24 joint not longer than 1%, palm of 
gnathopod 1 shorter than the hind margin, peduncle of uropod 3 shorter 
than rami, telson with sides slightliy convex and apical margin straight. 
Antenna 2 in C with 60—70 joints in flagellum (Boeck). Colour semi- 
pellueid, whitish, rarely (in adults?) with brownish marbling. L. © 12 mm. 


Arctie Ocean (Spitzbergen, Finmark, Tromsö); Kattegat. Depth 9—150 m. 


5 
2 
# 
A 
£ 


Monoeulodes : 261 


4. M.kröyeri Boeck 1871 M.k., A. Boeck in: Forh. Selsk. Christian., 1870 
p. 166 | 1876 M.k. (part.), A. Boeck, Skand. Arkt. Amphip., v.2 t.15 f.5 and 6 in part. 
(51,m,6i, k,n,r; the rest referring to other species) | 1892 M.k., G. ©. Sars, Crust. 
Norway, v.l p.305 t.108 £.2| 1894 M.k., T. Stebbing in: Bijdr. Dierk., 0.17 p.24 | 
1893 Oediceros nubilatus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 550. 


Body robust, tumid in front. In general like M. hanseni, but without 
carina, frontal process much shorter, the rostral tip reaching little beyond 
middle of 1° joint of antenna 1, eyes not very large, 24 joint of antenna 1 
not longer than 1°, in antenna 2 ultimate joint of peduncle as long as penulti- 
mate. Gnathopod 1, palm of 6" joint about equal to hind margin, in gnatho- 
pod 2 palm very oblique, only a little shorter than hind margin. Peraeo- 
pods 1—4 unusually expanded, finger rather broad, laminar, shorter than 
the 6% joint. Telson with convex sides, a little tapering to the truncate 
apex. L. 9 17 mm. 

Arctie Ocean (Greenland, depth 11—47 m); North-Sea (Haugesund [Norway], 
depth 113 m). 


5. M. pallidus O. Sars 1892 M.p., G.O.Sars, Crust. Norway, v.1 p.299 t.106 


 £.3|1893 Oediceros affinis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 938. _ 


Body rather compressed, but with no distinet carina. Frontal process 
short with narrow, acute, evenly curved rostrum not reaching apex of 1° joint 
of antenna 1; lateral corners of head obtuse. Side-plate 1 scarcely expanded. 
Eyes small, round, imperfectly developed, light red. Antenna 1 in Q longer 
than peduncle of antenna 2, 24 joint longer than 1°, flagellum shorter than 
pedunele, 9-jointed. Antenna 2, ultimate and penultimate joints of peduncle sub- 
equal, flagellum little shorter than peduncle. Gnathopod 1, process of 5" joint 
narrow, produced beyond hind margin of oval 6!" joint, palm well defined, 
moderately oblique. Gnathopod 2, slender process of 5!" joint produced 
much beyond hind margin of narrow 6!" joint, which is more than 3 times 
as long as broad. Peraeopods 1 and 2, 5t" joint tapering distally, densely 
setose on convex hind margin, finger short. Peraeopods 3 and 4, finger short, 
compressed. Peraeopod 5, 24 joint rather broadly oval, 5 little longer than At", 
Telson quadrangular, apical margin straight. Colour whitish, pellueid. 
L. © 8 mm. 


North-Atlantie (Norway). Depth 110--360 m. 


6. M. carinatus (Bate) 1856 Westwoodea c. (nom. nud.), Bate in: Rep. Brit. 
Ass., Meet. 25 p.58 | 1857 Kröyera carinata, Bate in: Ann. nat. Hist., ser.2 v.19 
p- 140 | 1883 Monoculodes carinatus, J. S. Schneider in: Tromse Mus. Aarsh., v. 6 
p-19 t.2 f£.4 | 1889 M.c., A.M. Norman in: Ann. nat. Hist., ser.6 v.3 p.447 t.19 
£.1—5 | 1892 M. c., G. O. Sars, Crust. Norway, v.1 p.295 t.105 | 1859 Oediceros affinis, 
R.M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 nr.1 p.93 t.4 f.18 | 1893 O. a. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p.548 t.4 f.3; t.38 £.27—31 | 1871 Monoculodes a., 
A. Bseck in: Forh. Selsk. Christian., 1870 p.164 | 1862 M. carinatus + M. stimpsoni, 
Bate, Cat. Amphip. Brit. Mus., p. 104 t.17 f£.2; p.105 t.17 £.3. 


Robust, rather tumid in front. Frontal process strongly vaulted, the 
short curved rostrum barely reaching apex of 1° joint of antenna 1. Side- 
plate 1 distally expanded. Pleon segments 1—3 dorsally carinate. Eyes 
very large, elliptical, purplish with yellowish coating. Antenna 1 in ©, 1° and 
24 joints subequal, flagellum shorter than pedunele, S-jointed. Antennal in JG, 
24 joint much shorter than 1°, flagellum thickened at base, with some 
joints densely setose. Antenna 2 in © nearly twice length of antenna 1, 
ultimate joint of pedunele much longer than penultimate, flagellum equal to the 


262 Monoeulodes 


2 combined; antenna 2 in C less elongate than usual. Gmathopod 1 (Fig. 65), 
process of 5th joint densely setose, produced beyond hind margin of oval 
6th joint, which has palm very oblique, longer than 
hind margin, not very sharply defined. Gnathopod 2 
(Fig. 66), process of. 5# 
joint very long and slender, 
extending a little beyond 
hind margin of 6% joint, 
which is more than 4 times 
as long as broad, palm 


6b joint = -/? 


Fig. 65. short, rather oblique, well 6% joint zu joint 
M. carinatus. 4 . 59 Fig. 66. M. carinatus. 
Gnathopod 1. defined. Peraeopods 1—4 Gnathopod 2. 
[After G. O. Sars.] rather short and stout, [After G. O. Sars.] 


densely setose, finger ex- 

tremely small; in peraeopods 1 and 2 6t" joint longer than 5tk, Peraeo- 
pod 5, 24 joint oval, hind margin irregularly curved, 5t, 6th and 7th joints 
subequal, each longer than 4, Uropod 3, rami narrowly lanceolate, longer 
than peduncle, each with about 5 spines. Telson not much longer than broad 
at the middle, which is somewhat dilated, apical margin straight. Colour 
yellowish white, mottled with dark brown in transverse bands, the most 
marked usually on 1° peraeon segment. Ova in pouch rose-coloured. 
L. 9 11, 9 9; 6—7 mm (Della Valle). 


North- Atlantic, North-Sea and Skagerrak Shoe Britain, France, Bohuslän, 
Norway); Kattegat; Gulf of Naples. 


7. M. griseus (Della Valle) 1893 Oediceros g., A. Della Valle in: F. Fl. Neapel, 
v.20 p.551 t.38 f. 16—%6. 

Back smooth. Frontal process short, deflexed. Side-plate 1 little 
expanded distally. Eyes oval, oceupying almost all the frontal process. , 
Antenna 1 longer than peduncle of antenna 2, 1° and 24 joints subequal, 
flagellum shorter than either, 5-jointed. Antenna 2, ultimate and penultimate 
joints of peduncle equal. Gnathopod 1, process of 5" joint short, broad, 6" joint 
oval, palm very oblique, much longer than ‘the obscurely defined hind 
margin, finger matching palm. Gnathopod' 2, process of 5" joint rather 
long, just reaching the well defined, rather short and oblique palm; the 
6'% joint a little widened at the palm. Peraeopods 1 and 2, finger described as 
little, not very weak, for peraeopod 2 figured nearly as long as 6% joint. 
Peraeopods 3—5, finger straight, in peraeopod 4 figured as long as 6% joint, 
in peraeopods 3 and 5 longer than 6®% In other respects agreeing with 
M. carinatus (p. 261). L. 5—6 mm. 

Gulf of Naples. 


8. M. borealis Boeck 1866 Oediceros affinis (part.) (err., non Bruzelius 1859)), 
Goös in: Öfy. Ak. Förh., v.22 p.527 t.39 f.21‘ | 1871 Monoculodes borealis, A. Boeck 
in: Forh. Selsk. Ohristian.. 1870 p.168 | 1876 M. b. (part.), A. Boeck, Skand. Arkt. 
Amphip., v.2 p.278 t.15 an & ?6 | 1883 M. b., J. S. Schueider in: Tromse Mus. Aarsh., 
v.6 p.22 t.1 f.3 | 1892 M.b., G. O. Sars, Crust. Norway, v.1 p.298 t.106 f.2 | 1893 
Oediceros nubilatus (part.), A. DellaValle in: F. Fl. Neapel, v.20 p. 550. 
Body not very tumid in front, pleon segments 1—3 scarcely carinate. 
Frontal process moderately large with abruptly deflexed rostrum, apex acute, 
reaching apex of 1° joint of antenna 1. Side-plate 1 distally expanded. Eyes 
moderate, rounded, dark red, on genieulation of head. Antenna 1 in 9 reaching 
just beyond peduncle of Antenna” 2, 1° joint rather longer than 24, flagellum 
much shorter than peduncle, 8-jointed. Antenna 2, ultimate joint of pedunele 


3 
E. 
3 


Monoeulodes 263 


shorter than penultimate, flagellum in O as long as those 2 combined. Gnatho- 
pod 1, process of 5!" joint short, broad, scarcely reaching defining point of 
oblique palm, which is scarcely longer than hind margin of oblong oval 6% joint. 
Gnathopod 2, process of 5" joint about or searcely reaching palm of 6% 
joint, which is about 3 times as long as broad, a little expanded at palm. 
Peraeopods 1’and 2, 24 joint curved, 24, 4!" and 5!" distally expanded, 5!" short, 
setose, finger not quite so long as 6", Peraeopods 3 and 4, finger as long as 
6th joint. Peraeopod 5 very long, 24 joint piriform, 5" joint longer than 4th, 
Telson rounded, quadrangular, apical margin slightly insinuated. Colour 
yellowish white, head retieulated and back transversely striped with dark 
brown. L. © 10 mm. 

Arctic Ocean and North-Atlantie (Spitzbergen, Greenland, Siberian Polar Sea, 
Norway, Scotland). i 


9. M. schneideri O.Sars 1895 M.s., G. O. Sars, Crust. Norway, v.1 p. 692 


ENIEL 


Intermediate between M. tesselatus (p. 264) and M. borealis. Body 
rather slender, pleon segments 1—3 scarcely carinate. Frontal process 
moderately large with abruptly deflexed rostrum, apex acute, not reaching 
apex of 1°t joint of antenna 1. Side-plates rather small, 1°' pair little expanded, 
lower hind corner of 4!" well produced. Eyes very large and protuberant, 
red, placed at geniculation of head. Antenna 1 reaching end of peduncle of 
antenna 2, 1% joint of peduncle a little longer than 24, flagellum shorter 
than peduncle, 8-jointed. Antenna 2 in Q, ultimate and penultimate joints of 
pedunele subequal, together as long as flagellum. Gnathopod 1, process of 5tt joint 
'broad, reaching ill-defined palm of rather small oval 6!" joint. Gmathopod 2, 
process of 5" joint reaching palm of 6", which is scarcely 3 times as long as 
it is broad. Peraeopods 1 and 2 rather stout, 5!" joint little expanded, subequal 


. in length to 6%, finger nearly as long. Peraeopods 3 and 4, finger as long as 


6! joint. Peraeopod 5 very long, 24 joint very broad, irregularly round, 
5th joint shorter than At, Gt or 7, Telson quadrangular, apical margin 
very slightly insinuated. Colour variegated with alternating irregular patches 
of dark brown. L. O0 6 mm. 

Arctie Ocean (Tromsö). Depth 13—19 m. 


10. M. crassirostris H. J. Hansen 1887 M.c., H.J. Hansen in: Vid. Meddel., 
ser.4 v.9 p.108 t.4 f.5—5f | 1889 M. carinatus?, A. M: Norman in: Ann. nat. Hist., 
ser.6 v.3 p.450 | 1893 Oediceros affinis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.548. 

Frontal process short, arched as to upper margin, lower nearly straight, 
apex acute, not reaching apex of 1° joint of antenna 1. Side-plate 1 distally 
somewhat expanded. Eyes on the bend of the head, large. Antenna 1 
short, 24 joint a little shorter than 1, flagellum short, about 8-jointed. 
Gnathopod 1 robust, process of 5tk joint broad and rather long, 6 joint 
quadrangular oval, palm ill-defined, furnished with simple setae, finger touching 
process of 5th joint. Gnathopod 2, the long slender process of 5t" joint 
produced beyond the short palm of 6" joint, which is 5 times as long as 


- its middle width, broadest near base. Peraeopods 1 and 2 short, setose, 24, 


4 and 5th joints rather dilated, 6!" scarcely as long as 5t*, finger short, very 

slender. Peraeopod 3, 24 and 4th joints broad, 5tt much shorter than 4*", 

finger only half length of 6%". Peraeopod 5, 24 joint much expanded, as 

broad as long. Telson subrectangular, corners rounded, apical margin insinuate. . 

Colour whitish, each segment transversely banded with red-brown. L. 8 mm. 
Arctic Ocean (Greenland). 


264 Monoeulodes 


11. M. latimanus (Gods) 1866 Oediceros 4, Goes in: Öfv. Ak. Förh., v. 22 
p.527 t.39 £.23 | 1893 O.1., A. Della Valle in: F. Fl. Neapel, v.20 p.549 t.58 f.67,68 | 
1871 Monoculodes l., A. Boeck in: Forh. Selsk. Christian., 1870 p.168 | 1876 M.1,, 
A. Boeck, Skand. Arkt. Amphip., v.2 p.279 t.14 f.2| 1883 M.l, J.S. Schneider in: 
Tromse Mus. Aarsh., v.6 p.öl t.1 f.2 | 1892 M. 1. G. O. Sars, Crust. Norway, v.1 
p.304 1.108 f.1. 


Rather slender and compressed. Frontal process short, not strongly 
deflexed, apex of rostrum obtuse, scarcely reaching beyond middle of 1° joint 
of antenna 1. Side-plate 1 distally expanded. Eyes rather small, rounded, 
dark red, at base of frontal process. Antenna 1 rather short, but longer than 
peduncle of antenna 2, 1° joint longer than 24, flagellum subequal to peduncle, 
10-jointed. Antenna 2, ultimate joint of peduncle slightly shorter than penultimate, 
flagellum subequal to pedunele. Maxilla 1, outer plate with 9 spines. Gnatho- 
pod 1, process of 5t" joint very short, 6" joint much widened towards the 
well defined palm, which is much longer than hind margin. Gmnathopod 2, 
process of 5t" joint unusually small, scarcely reaching beyond middle of hind 
margin of large, oblong oval 6% joint, which widens towards well defined 
large oblique palm. Peraeopods 1 and 2, 24 joint bent, 6" subequal to 5t", finger 
short. Peraeopods 3 and 4, finger rather more elongate, but not as long as 
6" joint. Peraeopod 5, 24 joint piriform, last 4 joints subequal to one another. 
Telson a little longer than broad, apical margin nearly straight or slightly 
rounded, carrying 4 spinules. Colour pale yellowish; ova dark violet. L. 7 mm. 

Arctic Ocean and North-Atlantie (Norway from Namdal northwards, depth 
19—94 m; Spitzbergen; Greenland, depth 4—132 m). 


12. M. tesselatus J.S. Schn. 1883 M.norvegicus (err., non Oedicerusn. A. Boeck 
1861!) J. S. Schneider in: Tromso Mus. Aarsh, v.6 p.21 t.1 £.5; t.3 f.20 | 1884 
M. tesselatus, J. S. Schneider in: Tromse Mus. Aarsh., v©.7 p.81 | 1892 M. tessellatus, 
G. O. Sars, Crust. Norway, v. 1 p.297 t.106 f. 1 | 1895 Oediceros nubilatus (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p.550. 


Frontal process not greatly produced, San curved, rostral apex 
reaching apex of 1° joint of antenna 1. Side-plate 1 subrectangular, little 
expanded. Pleon segments 1—3° scarcely carinate. Eyes large, rounded 
oval, bright red, at base of frontal process. Antenna 1 in O reaching a little 
beyond peduncle of antenna 2, 1° joint rather longer than 24, flagellum nearly 
as long as peduncle, 11-jointed; in J 1° joint of peduncle twice length 
of 24, flagellum densely setose. Antenna 2 in C as long as body, ultimate 
joint of pedunele shorter than penultimate (equal to it according to Schneider). 
Gnathopod 1, process of 5" joint short, broad, not reaching palm, 6% joint 
oval, palm well defined, about as long as hind margin. Gmathopod 2, process 
of 5t" joint not more than reaching palm, 6% joint of even width, scarcely 
more than tbrice as long as broad. Peraeopods 1—4, finger as long as 
6% joint; in peraeopods 1 and 2 6% joint scarcely longer than 5". Peraeo- 
pod 5, 5th joint shorter than 4 or 6%, Uropod 3, peduncle equal to 
rami in length. Telson shortly oval, apical margin distinetly insinuate. 
Colour whitish, tessellated with dark brown patches. L. 8 mm. 


Aretic Ocean (Norway from Kvalö northwards). Depth 38—94 m. 
13. M. simplex H. J. Hansen 1887 M.s., H.J. Hansen in: Vid. Meddel., ser. 4 


v.9 p.114 t.4 f.6—6h | 1893 Oediceros nubilatus (part.), A. Della Valle in: F. Fl. Neapel, 
v. 20 p. 550. 


Near to M. tesselatus and M. borealis (p. 262). Frontal process not 
greatly produced, pretty evenly curved, little deflexed, rostral apex acute, 


u a re a en mid 


Monoeulodes 265 


about reaching apex of 1° joint of antenna 1. Side-plate 1 a little expanded 
distally. Eyes of moderate size, at base of frontal process. Antenna 1 
reaching considerably beyond pedunele of antenna 2, 1° joint rather longer 


than 24, joints of flagellum elongate. Antenna 2, ultimate joint of pedunele 


rather shorter than penultimate. Gnathopod 1, 24 joint not dilated, process 
of 5th joint apically narrowed, scarcely reaching palm of 6*% joint, palm 
minutely pectinate and set with setules and numerous little hooks. Gnathopod 2, 
process of 5!" joint slender and long, yet not quite reaching palm, which 
is oblique and furnished as in gnathopod 1, 6Fh joint of uniform width. 
Peraeopods 1 and 2, joints little dilated, finger a little shorter than 6!" jomt. 
Peraeopods 3 and 4, 24 joint well expanded, the rest not, finger long, nearly 
straight. Peraeopod 5, 24 joint broad, narrowed distally, 5% rather longer 
than 4, 6th than 5%, finger longer than 4. Telson a little longer than 
broad, a little tapering, apical border emarginate more deeply than usual, 
lateral angles subacute. Colour pale tinged with brown. L. 75 mm (not 
full grown). 


Aretic Ocean (Greenland). Depth 19—48 m. 


14. M. tuberculatus Boeck 1866 Oediceros affinis (part.) (err., non Bruzelius 
18591), Goes in: Ofv. Ak. Förh., v.22 p.527 t.39 f.21 | 1871 Monoculodes tuberculatus, 
A, Boeck in: Forh. Selsk. Christian., 1870 p. 167 | 1876 M.t., A. Boeck, Skand. Arkt. 
Amphip., v.2 p.277 t.15 f.2 | 1883 M.t., J. S. Schneider in: Tromss Mus. Aarsh., v. 6 
p-29 t.1 f.8 | 1892 M.t., G.O. Sars, Crust. Norway, v.1 p.303 t.107 £.3 | 1893 Oediceros 
nubilatus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 550. 


Rather stout. Frontal process strongly convex, rostral part large, 
deflexed, acute, reaching beyond 1° joint of antenna 1. Side-plate 1 distally 
expanded. Eyes of moderate size, round, bright red, at base of frontal 
process. Antenna 1 without the plumose setae so commonly present, 1° joint 
longer than 24, apex of 24 joint produced uniquely into a setose quadrate 
lobe or tubercle, flagellum rather longer than peduncle, 8-jointed. Antenna 2 
scarcely longer than antenna 1, ultimate joint of peduncle shorter than pen- 
ultimate (equal, according to Schneider), flagellum 16-jointed (Boeck), L1-jointed 
(Sars in fig.). Maxilla 1, outer plate according to Schneider carrying 7 spines. 
Gmnathopod 1, process of 5 joint not reaching palm, 6% joint oblong oval, rather 
curved, palm as long as hind margin. Gnathopod 2 scearcely longer than 
gnathopod 1, though more slender, process of 5% joint slender, not reaching 
palm, 6t% joint thrice as long as broad, not widened distally, palm oblique. 
Peraeopods 1 and 2, 5% joint distally widened, finger about ?/, length of 6%. . 
Peraeopods 3 and 4, 24 joint broad, 6% much longer than finger. Peraeopod 5, 
24 joint piriform, 4" shorter than 5%, 5th than 6b, Uropod 3, rami much 
longer than pedunele. Telson quadrangular, slightly tapering, apical margin 
insinuate, carrying 2 spinules, angles rounded. Colour yellowish, with shadows 
of diffuse orange; ova dark violet. L. 6-8 mm. 

Arectie Ocean and North-Atlantie (Spitzbergen; Greenland; Norway, depth 94— 
188 m; Firth of Clyde). 


15. M. norvegicus (Boeck) 1861 Oedicerus n. (part.), A. Boeck in: Forh. 
Skand. Naturf., Mode8 p.650 | 1871 Monoculodes n., A. Boeck in:*Forh. Selsk. Christian. 
1870 p.164 | 1876 M.n., A. Boeck, Skand. Arkt. Amphip., v.2 p.267 t.14 f.5 | 1892 
M. n., G.O. Sars, Crust. Norway, v.1 p.301 t.107 £.1 | 1893 Oediceros nubilatus (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 550. 


Rather short and stout, though somewhat compressed. Frontal process 
deflexed, rostral apex acute, reaching beyond 1° joint of antenna 1. Side- 


266 Monoeulodes 


plate 1 little expanded distally. Eyes rather large, oval, dark red, placed at base 
of frontal process, some way from apex. Antenna 1 reaching beyond peduncle 
of antenna 2, 1° joint longer than 24, flagellum longer than peduncle, about 
12-jointed. Antenna 2 in 9, ultimate and penultimate joints of pedunele sub- 
equal, together longer than flagellum. Gmathopod 1, process of 5 joint broad, 
reaching palm, 6% joint oblong oval, slightly curved, expanded distally, 
palm well defined, scarcely as long as hind margin. Gnathopod 2, process 
of 5th joint reaching palm, 6! joint nearly 4 times as long as broad. 
Peraeopods slender. Peraeopods 1 and 2, 5tk joint little expanded, shorter than 
6", finger long, but rather shorter than 6% joint. Peraeopod 5, 24 joint 
piriform, 5t% longer than 4" and slightly longer than 6%. Telson quadrangular, 
little longer than broad, apical margin scarcely insinuate. Colour persistent, 
whitish, with transverse bands of reddish brown. L. Q scarcely more 
than 6 mm. 


Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (South- and West-Norway 
northwards to Vadsö); Kattegat. Depth 90-376 m. 


16. M. subnudus Norm. 1889 M.s., A. M. Norman in: Ann. nat. Hist., ser. 6 
v.3 p.450 | 1892 M. falcatus, G. O. Sars, Crust. Norway, ©.1l p.302 t.107 f.2 | 1893 
Oediceros nubilatus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 550. 


Near to M.borealis, M.simplex (p. 262, 264) and to M.norvegicus (p. 265). 
Frontal process evenly curved downward, apex of large rostrum reaching 
beyond apex of 1° joint of antenna 1. Side-plate 1 considerably- expanded 
distally. Eyes large, rounded oval, bright red, at base of frontal process. 
Antenna 1 in O reaching much beyond peduncle of antenna 2, 1° joint as 
long as 24 and 34 combined, flagellum longer than peduncle, about 13-jointed 
(Sars). Antenna 1 in ©, 24 joint as long as 1°, 34 half length of 24, 
flagellum with 11—14 joints (Norman in text, but in figure the 3 joints 
of peduncle, measure respectively 9, 7, 5 sixteenths of inch). Antenna 2, 
ultimate joint of pedunele shorter than penultimate (Sars), subequal (Norman), 
flagellum as long as both combined. Gmnathopod 1, process of 5tk joint 
reaching palm (Sars), not reaching it (Norman; their figures scarcely distin- 
guishable), 6% joint narrow oblong, somewhat curved, palm shorter than 
bind margin. Gnathopod 2, process of 5tk joint not nearly reaching palm 
(Sars), reaching palm (Norman; in figures the difference is trifling), 6 joint 
narrow sublinear, more than 4 (Sars; Norman: 5) times as long as broad. 
Peraeopods less setose than usual (Norman). Peraeopods rather less slender 
than in M. norvegieus, 5! joint in 1° and 24 slightly expanded, finger 
comparatively shorter. Telson subquadrate, apical border emarginate, and 
according to Norman each rounded angle carrying 5 spinules. Colour more 
or less dark orange (Sars). L. 10 mm. 

North-Atlantie and Arctic Ocean (Norway to aretie circle, depth 94—188 m; 
Shetland Islands; Sleat Sound [Isle of Skye]). 


17. M. packardi Boeck 1871 M.p., A. Boeck in: Forh. Selsk. Christian., 1870 
p- 166 | 1876 M. p., A. Boeck, Skand. Arkt. Amphip., v.2 p.274 t.14 f.3 | 1883 M.p., 
J.S. Schneider in: Tromse Mus. Aarsh., ©.6 p.27 t.1.£.6 | 1892 M.p., G. O. Sars, 
Crust. Norway, v.1 p.307 t.109 f.1 | 1898 Oediceros nubilatus (part.), A. Della Valle 
in: F. Fl. Neapel, v.20 p. 550. 

Rather slender. Frontal process rather convex, rostral part long, narrow, 
not reaching end of 1° joint of antenna 1. Side-plate 1 distally expanded. 
Side-plates in S smaller than in ©. Eyes small, rounded oval, light red, 
at base of frontal process. Antennae 1 and 2, peduncle elongate. Antenna 1 


Monoeulodes, Oediceroides 267 


- 


longer than peduncle of antenna 2, 24 joint as long as 1° or longer, flagellum 
in O rather shorterthan peduncle, 9-jointed. Antenna 2, ultimate joint of peduncle 


- nearly as long as penultimate, both densely setose in O, not in C, flagellum 


in O nearly as long as peduncle, in S-very long, filiform. Lower lip with a 
single central lobe (Boeck). Maxilla 1, outer plate with 6 spines (Schneider). 
Gnathopod 1, process of 5" joint short, broad, not reaching palm, 6" joint oblong 
oval, little expanded distally, palm ill-defined, about as long as hind margin. 
Gnathopod 2, process of 5t" joint about reaching palm, 6% joint more than 
twice as long as broad, a little expanded distally, palm ill-defined. Peraeo- 
pods 1-4, finger, especially in 34 and 4", very long, longer than 6! joint. 
Peraeopod 5, 24 joint broad above, fringed with delicate setae, 5t" joint shorter 
than 4", Uropod 3, rami unarmed, about as long as pedunele. Telson oblong 
oval, little tapering, apically rounded with 2 adjacent spinules. Colour whitish' 
pellucid, orange on back, antennae banded with orange; ova rose-coloured, 
L. 7—12 mm. 


Aretie Ocean, North»Atlantie, North-Sea and Skagerrak (Norway, depth 19—188 ın ; 
Firth of Clyde, depth 75 m). 


18. M. tenuirostratus Boeck 1871 M.t., A. Boeck in: Forh. Selsk. Ohristian., 
1870 p. 167 | 1876 M.t., A. Boeck, Skand. Arkt. Amphip., v.2 p.276 t.14 f.4 | 1892 
M.t., G.O. Sars, Urust. Norway, v.1 p.309 t.109 f.2 | 1893 Oediceros aequicornis (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 545. 


Nearly allied to M. packardi. Frontal process evenly curved, rostral 
part very long and narrow, nearly reaching apex of 1°t joint of antenna 1. 
Side-plate 1 distally expanded. Eyes at base of frontal process, faint in 
aleoholie specimens. Antennae 1 and 2 elongate. Antenna 1, 29 joint much 
longer than 1°, flagellum shorter than pedunele, 12-jointed. Antenna 2 in © 
scarcely longer than antenna 1, ultimate joint of pedunele shorter than pen- 
ultimate, flagellum shorter than peduncle. Gnathopods 1 and 2 much stronger 
than in M. packardi. Gmnathopod 1, process of 5t joint large, broad, very 
setose, reaching palm, 6" joint widened distally, palm well defined. Gnatho- 
pod 2, process of 5t" joint reaching palm, 6!" joint scarcely more than twice 
as long as broad, widened distally, palm about as long as hind margin. 
Peraeopods nearly as in M. packardi. Telson oval triangular, strongly tapering 
to obtuse point with 2 spinules. L. O0 8 mm. 


Christianiafjord [Norway], North-Atlantie. 


M. demissus Stimps. 1853 M.d., Stimpson in: Smithson. Contr., ©. 6 nr.5 
p.54 | 1893 M.d., A. Della Valle in: F. Fi. Neapel, v.20 p. 556. 
L. 9 mm. 


Fundy Bay (Duck Island, Grand Manan). Depth 7 m. 


18. Gen. Oediceroides Stebb. 


1888 Oediceroides, T. Stebbing in: Rep. Voy. Challenger, v.29 p.843 | 1892 O., 
G. 0. Sars, Crust. Norway, v.1 p. 287. 


Head with frontal process conspicuously developed (Fig. 67). Side- 
plates not very large, 1° expanded distally, produced forward. Eyes, when 
present, elongate, contiguous, on frontal process. Antenna 1 much shorter 
than antenna 2 (Fig. 67). Mouth-parts nearly as in Oediceropsis (p. 252), 
but inner plate of maxilla 1 more strongly developed, carrying from 


-3—8 plumose setae, outer plate with 9 spines. Gnathopods 1 and 2 nearly 


268 


Oediceroides 


n 


- alike, powerful, 5!" joint distally expanded into a broad setose process, 6'h 
elongate oval or squarish, palm longer than hind margin. 


4 species. 


Synopsis of species: 


| Eyes represented only by a pigment mas. ... . 1. O. rostratus . p.268 
1 Eyes not represented 


Eyes distinet — 2. 


uf 


Back without tubereles 


a Da NE a EN 


re 2. O. proximus . p.269 


ae 3. O. cinderella . p. 269 
4. O. ornatus . . p.270 


1. ©. rostratus (Stebb.) 1883 Oediceropsis rostrata, T. Stebbing in: Ann. nat. 
Hist., ser. 5 v.11 p. 204 | 1888 Oediceroides r., O. conspicua, T. Stebbing in: Rep. Voy. 


> 
4] ZI I -4= 


S 
Syyunpr 

Fig. 67. O. rostratus. 
Rostrum and antennae. 


—— 


Flagellum 


Challenger, v. 29 p. 844; p. 547 t.60, 61 | 
1893 Halimedon rostratus, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 540 t. 58 #. 46—49. 


Body finely pubescent, peraeon 
segments 1—6 transversely furrowed, 
segment 7 and pleon segments 1—4 
tuberculately keeled. Side-plate 4 deeply 
emarginate behind. Frontal process 
(Fig. 67) arcuate, reaching middle of 
24 joint of antenna 1, prismatie in cross 
section, with a little boat-shaped rostral 
apex, lateral corners of head acute, 
postero-antennal rounded. In place of 
eyes, frontal process filled with a bifid 
mass of granular bright red pigment. 
Antenna 1 (Fig. 67) reaching little 
beyond penultimate joint of peduncle of 
antenna 2; 1°joint as long as 24 and 34 
combined, flagellum 21-jointed, hirsute, 
tapering. Antenna 2 (Fig. 67), ultimate 
joint of peduncle shorter than penulti- 
mate, both stout, setulose, armed with 
long spines, flagellum shorter than pe- 
duncle, tapering, of 65 joints, most with 
calceoli, or peduncle without long 
spines, flagellum longer than peduncle, 
of 74 joints, without calceoli Upper lip 
transversely- oval, a little projecting 
at centre. Mandible, eutting plates 
distinetly denticulate. Maxilla 1, inner 
plate with 8 plumose setae, 24 joint 
of palp with many spiniform setae 
about apex. Maxilla 2, inner margin 
of inner plate entirely fringed with 
setae. Gmathopods 1 and 2, 5th joint 


shorter but broader than oval 6", considerably so in gnathopod 2, in which 
the 6% joint is little broader, but considerably longer than in gnathopod 1, 
palm long, feebly defined. Peraeopods 1—4 setose, finger nearly as long as 
6h joint, with cap over the nail. Branchial vesicles in peraeopods 1 and 2 
very large, lightly erumpled. Peraeopods 3 and 4, 4 joint as long as 24 or 


Oediceroides 269 


longer, both very setose. Peraeopod 5, 24 joint piriform, large, but not 
longer than 4", which is a little longer than 5th or 6%, all the three 
spinose; the finger straight, as long as 5!" or 6t% joint, with slender spines 
or setae fringing both margins. Uropod 3, rami rather longer than peduncle, 
subequal, lanceolate, spinulose and partly pectinate. Telson small, subquadrate, 
sides convex, apical border emarginate. L. 18—31 mm. 

Southern Indian Ocean (Cumberland Bay [Kerguelen Island], depth 223 m; 
Heard Island, depth 274 m). a 


2. O. proximus Bonnier 1896 O.proxima, J. Bonnier in: Ann. Univ. Lyon, 
v.26 p. 640 t.38 £.1. 


Pleon segments I—3 dorsally covered with little conical tubercles, 
close set, produeing a downy appearance. Head, frontal process or rostrum 
acute, scarcely longer than 1° jeint of antenna 1, lateral corners rounded. 
Side-plate 1 distally expanded and produced, 4" dilated in front, hind margin 
almost straight. Eyes entirely wanting. Antenna 1 rather longer than peduncle 
of antenna 2, 1° joint longer than 24 and 34 combined, flagellum longer than 
peduncle, with 17 short thick joints. Antenna 2, ultimate joint shorter than thick 
penultimate, flagellum long, 64-jointed. Mouth-parts nearly as in O. rostratus; 
maxilla 1 with 6 setae on inner plate, outer with 8 spines. Gmathopod 1, 
5th joint distally expanded, spinose, shorter than oval 6%, in which palm is 
finely erenulate, longer than hind margin, defined by a palmar spine, finger 
as long as palm. Gmnathopod 2, 5% joint distally produced, though not to 
end of hind margin of 6%, which is longer not wider than in gnathopod 1. 
Peraeopod 1, 6% joint narrow at the extremities, dilated at middle of setose 
front margin. Peraeopods in general like those of O. rostratus. Uropod 3 
not known. Telson oval, with 2 spinules and 2 setules at the rounded 
apex. L. d 7 mm. 


Bay of Biscay. Depth 650—950 m. 


3. O. cinderella Stebb. 1888 O. c., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.850 t. 62, 63 | 1895 Halimedon e., A. Della Valle in: F. Fl. Neapel, v.20 p. 540 
t.58 f.45—45. 


Back a little imbrieated. Side-plate 1 greatly expanded and produced 
forward, 4% slightly excavate behind. Frontal process deflexed, nearly reaching 
apex of 1° joint of antenna 1, prismatie in section; lateral corners of head 
subacute, postero-antennal corners rounded. Eyes long, narrow, nearly reaching 
blunt apex of frontal process. Antenna 1, 1° joint longer than 24, 24 nearly 
twice as long as 34, all with plumose setae, flagellum slender, probably not long. 
Antenna 2, ultimate joint of peduncle much narrower than penultimate, about as 
long, armed with large spines, flagellum of 54 joints, most with calceoli. Upper 
lip smoothly rounded. Mandibular palp, 24 joint decidedly longer than 34, 
Maxilla 1, inner plate with 3 plumose setae. Maxilla 2, inner plate not 
wholly fringed with setae. Gmnathopods 1 and 2, 5th joint as broad as long, 
shorter than 6t%, 6 Jonger than broad, the long convex palm forming a 
very deeided angle with the much shorter hind margin, this joint being 
longer, but not broader in gnathopod 2 than in gnathopod 1, finger long 
and curved. Peraeopods 1--4 moderately setose, finger boat-shaped, in peraeo- 
pods 1 and 2 a little shorter, in peraeopods 3 and 4 a little longer than the 
6*b joint, a cap over the nail. Branchial vesieles with accessory lobe at base. 
Peraeopods 3 and 4, 24 joint not broadly oval, in peraeopod 4 shorter than 
4b joint. Peraeopod 5, 24 joint broad oval, longer than 4th, 5th or 6th, 


270 Oediceroides, Oedicerotidarum species incerftae sedis, Synopiidae . 


which are subequal. Telson small, rounded oval, with spinules and plumose 
setules on rounded apex. L. 15 mm.’ 


South-Atlantie (Falkland Islands). Depth 1893 m. 


4. O. ornatus (Stebb.) 1883 Acanthostepheia ornata, T. Stebbing in: Ann. nat. 
Hist., ser.5 o.11 p.203 |! 1888 Oediceroides o., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.855 t.64 | 1893 Halimedon ornatus, A. Della Valle in: F. Fl. Neapel, v.20 p. 536 
t.58 f. 33—35. 


5 Back imbricate and diseontinuously carinate, with large medio-dorsal 
tubereles, and on peraeon and pleon segments 1 and 2 smaller läteral ones, hind 
margin of peraeon segments I—7 and pleon segment 1 fringed with small 
tubereles. Side-plate 1 much produced forward, 4! excavate behind. Head 
dorsally ridged, with conspieuous frontal process, constrieted at base, prismatic 
in cross section; lateral corners rounded. Eyes long, separated only by the 
narrow carina, occupying frontal process to its acute tip, remaining dark in 
spirit, ocelli numerous. Antenna 1, pedunele slender, short, 1° joint longer 
than 24, 34 feeble, suggesting that the missing flagellum is small. Antenna 2, 
penultimate joint of pedunele much longer than ultimate, 1° joint of flagellum 
carrying ‚a calceolus, rest missing. Upper lip, distal margin broad. Lower 
lip, outer lobes very broad, character of inner not clearly ascertained. Mandible, 
24 joint of palp a little longer than 34. Maxilla 1, inner plate very large, 
with 5 setae. Maxilla 2, inner margin of inner plate wholly fringed with 
setae. Gnathopods 1 and 2, 5tk joint shorter than 6'%, with a rather massive 
setose or spinose lobe, 6th oval, broadest at base, the very long setose palm 
moderately defined from the short hind margin. Peraeopods 1—5 all more 
or less broken, what remained showing the characters usual in the family. 
Uropod 3 not as long and not reaching so far -back as uropods 1 or 2; 
rami lanceolate, spinose, a little longer than peduncle. Telson small, oblong, . 
slightly narrowing to the scarcely emarginate apieal border. L. © 15 mm. 


Bass Strait (East Moncoeur Island). Depth 70 m. 


Oedicerotidarum species incertae sedis. 


Oedicerus novi-zealandiae Dana 1853 &55 O. n., J.D. Dana in: U.S 
expl. Exp., v.1311 p. 934 t.63 f.7a—h | 1861 ©. n., A. Boeck in: Forh. Skand. Naturf., 
Mode 8 p.650 | 1862 O. novae-zealandiae, O. novi-zealandiae, Bate, Cat. Amphip. Brit. 
Mus., p. 104 t.17 £.1] 1876 O. novae-zealandiae, Miers, Cat. Crust. N. Zealand, p. 126 | 
1886 O. neo-zelaniceus, (G. M. Thomson &) Chilton in: Tr. N. Zealand Inst., v.18 p. 149. 


Generically near to Exoediceros (p. 239), but with finger on peraeopods 1 and 2 
well developed. Colour greenish. L. 4 mm. 


South-Paeifie (New Zealand). Rock-pools. 


20. Fam. Synopiidae 


1853 Subfam. Synopinae, J.D. Dana in: U.S. expl. BED v.1311 p. 981 | 1886 
Synopidae, Bovallius in: N. Acta Soc. Upsal., ser.8v.13 nr. 9 p.3 | 1888 S., T. Stebbing 
in: Rep. Voy. Challenger, 0.29 p. 798. 


Integument thin, pellueid. Head klansulee. not inflated, produced over 
bases of antennae 1 and 2. Side-plate 3 the largest. Eyes large, coalesced 
at top of head, usually with small lateral pair below. Antenna 1 shorter 
than antenna 2, peduncle short, 1°* joint of flagellum large, accessöry flagellum 


Kr Fall a Ze nr > ae nn nl dr u A da 


Synopiidae, Synopia 271 


rather long. Upper lip bilobed. Mandible normal, but 24 joint of palp large, 
34 minute. Maxilla 1, inner plate with several setae, outer with 8 spines, 
24 joint of palp with spine-teeth on apex. Maxilla 2, inner plate broader 
than outer, fringed on inner margin. Maxillipeds strongly setose, inner plates 
rather short, rounded at apex, outer long, narrow, 4" joint of palp very 
small. Gmnathopod 1 scarcely subchelate (Fig. 68), gnathopod 2 simple 
(Fig. 69). Peraeopods 1 and 2 with 4% and 5t% joints dilated. Peraeo- 
pods 3—5, 24 joint expanded. Uropods 1 and 2, outer ramus shorter than 
inner, uropod 3 reaching furthest back, outer ramus the longer, 2-jointed. 
Telson cleft. 


Marine. 


1 genus, 2 species accepted, 3 doubtful. 


1. Gen. Synopia Dana 


1852 Synopia, J. D. Dana in: Amer. J. Sei., ser.2 v.14 p.315 | 1853 S., J.D. 
Dana in: U.S. expl. Exp., v.131r p.994 | 1871 S., Claus in: Nachr. Ges. Götting., p. 157 | 
1886 S., Bovallius in: N. Acta Soc. Upsal., ser.8 v.15 nr.9 p.4 | 1888 $., T. Stebbing 
in: Rep. Voy. Öhallenger, v.29 p.799 | 1893 S., A. Della Valle in: F. Fl. Neapel, v.20 p. 850. 


With the character of family. 
2 species accepted, 3 doubtful. 


Synopsis of accepted species: 


EOlNOn SOMOWlDE FISngulär. ı 2 u see ni 1. S. ultramarina . p.271 
Ba nee en an 2 Bu Bahserleane..... 1: 278 


1. S. ultramarina Dana 1853 &55 S.u.-+-S. gracilis, J. D. Dana in: U.S. 
expl. Exp., v.131r p. 995; t.68 f.6a—h, 7a—e | 1862 $.u., Bate, Cat. Amphip. Brit. 
Mus.. p.341 t.54 f.1 | 1886 $. u., Bovallius in: N. Acta Soc. Upsal., ser.3 v.13 nr. 9 
p-6 t.1 | 1893 S. u. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 851. 


Body and front of head sharp-edged, peraeon segments 1—7 short, 
pleon segments 1—3 long and large. Front of head at right angles to 
dorsal line. Side-plates 1 and 2 small, slightly bent forward, 3% far larger, 
quadrangular, emarginate behind, 4" not large, triangular, with the longest 
side arcuate, 5th—7th small; pleon segments 1—3, postero-lateral corners 
subquadrate. Eye seemingly variable, round or oval, especially perhaps in 9, 
the little lateral eyes having 3 or 4 lenses, colour continuing dark in spirit. 
Antenna 1, flagellum in © with 5 jeints, in G with 10—14, in both 1°* long, 
tapering, more or less fringed, accessory flagellum 2-(Dana: faintly 3-)jointed, 
a little longer or shorter than 1° of primary, the terminal joint minute. 


"Antenna 2, ultimate joint of peduncle much shorter than penultimate, flagellum 


in © with 12—14 joints, in d with 18. Triturating lobes of stomach fringed 
with very slender spines. Gmathopod 1, 24 joint rather widened distally, 
5th joint large and long, narrow at the extremities, fringed on hind margin 
with long plumose spines or setae, 6!" very -much smaller, broadiy ovate, 
fringed on part answering to palm with plumose spines or setae, finger 
nearly as long as 6tk joint, slender, slightly curved, scarcely intended to 
close against any palm margin, since the equivalent of the palm is clothed 
as above mentioned. Gnathopod 2 much more slender, 5" joint long and 
narrow, 6{h also narrow, more than half as long, both fringed on hind margin 


272 Synopia 


with long spines, finger small, with a nail nearly as long as the base. 
Peraeopod 1, 24 joint widened distally, 4 and 5t" joints broad, subequal, 
the 5th oval, fringed on hind margin, 6% sublinear, rather shorter than 5t, 
finger more than half length of 6, the base more than twice as long as the little 
nail. Peraeopod 2 differing from peraeopod 1, 4" joint broad, rather cup- 
like, much shorter than the broadly oval densely fringed 5th, 6tk narrowly 
oval, about half as long and broad as 5", slightly armed, finger as in 
peraeopod 1. Peraeopods 3 and 4, 24 joint a very broad oval, the hind 
wing so transparent as easily to escape observation, 6% joint subequal in 
length to 24, longer than the other joints, finger long and straight. Peraeo- 
pod 4 rather longer than peraeopods 3 or 5. Peraeopod 5, 24 joint with 
straight front, hind margin produced downward, forming a subangular lobe, 
finger shorter than in peraeopods 3 and 4. Pleopods have 2 cleft spines 
on 1° joint of inner ramus. Uropod 1 much longer than uropod 2, its 
pedunele much longer than pedunele of uropod 3, but its rami shorter. 
Telson reaching distinetly beyond peduncle of uropod 3; triangular, obliquelv 
truncated behind, divided beyond the middle (Bovallius), or, triangular with 
a tendency to oval, cleft to the middle, the apices notched, with the outer 
tooth rather more produced than the inner. Colour rich blue to hyaline, 
tinted in parts with blue. L. 4—6 mm. 


Tropical Atlantie (lat. —12° S., long. 11—25° W.). 


2. S. scheeleana Bovall. 1886 S.s., Bovallius in: N. Acta Soc. Upsal., ser. 3 
v.13 nr.9 p.16 t.2 f.22—29 | 1888 S. s., T. Stebbing in: Rep. Voy. Challenger, v.29 
p. 799 t.52 | 1893 S. ultramarina (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 851. 


Very near to S. ultramarina (p. 271), but antenna 1 more elongate 
and telson differently shaped. Eye large, oval, sometimes 
narrowly prolonged backward, about 30 lenses; lateral eyes 
of 4 lenses. Antenna 1, flagellum in S with 16—20 joints, 
1t]ong, closely fringed, accessory flagellum equal 
to it ora little shorter, its 24 joint minute, tipped 
with a setule. Antenna 2, flagellum 20-jointed. 
Uropod 2, outer ramus totally smooth along both 
margins (Bovallius) or finely peetinate along 
upper margin (Stebbing), inner ramus with 
2 spines (Bovallius) or 1 spine (Stebbing) on 
inner margin. Telson broadly ovate, reaching 


Fig. ’68. : ; Fig. 69. 
ee little beyond peduncle of uropod 3, ceft a 
Gnathopod ı. about to centre, sometimes beyond, sometimes Gnathopod 2. 


falling short of it, apices rounded, slightly 
notched, inner point equally advanced with outer or falling short of it. 
Colour hyaline. L. 4-6 mm. : 


Tropical Atlantie and Paeifie. 


S. angustifrons Dana 1853 &55 $.a., J. D. Dana in: U. S. expl. Exp., v. 1311 
p. 998; t.68 f.8a—d | 1886 S.a., Bovallius in: N. Acta Soc. Upsal., ser.3 v.13 nr.9 
p.20 t.2 f. 36—839 | 1893 8. ultramarina (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p.851. 


Antenna 1 short, flagellum 5-jointed. Antenna 2, flagellum 10-jointed. L. 3 mm. 
Tropical Paeifie (lat. 18% S., long. 122° W.), 


”. Se 
Synopia, Tironidae 273 
S. caraibica Bovall. 1886 S.c., Bovallius in: N. Acta Soe. Upsal. „ser.3 v.13 


ar.9 p.14 t.2 £.30 | 1893 8. ultramarina (part), A. Della Valle in: F. FL. Neapel, 
2.20 p. 851. 


L. 5 mm. 
Caribbean Sea. 


S. orientalis Kossm. 1880 S.o., Kossmann in: Reise Roth. Meer, v.2ı Malaecost. 


-p.137 t.15 £. 11-13 | 1886 S.o., Bovallius in: N. Acta Soc. Upsal., ser.3 v.13 nr. 9 


p-21 | 1893 8. ultramarina (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 851. 
L. 3mm. 
Red Sea. 


21. Fam. Tironidae 


1871 Subfam, Syrrhoinae, A. Boeck in: Forh. Selsk. Christian., 1870 p.146 | 1888 
Syrrhoidae, 'T. Stebbing in: Rep. Voy. Challenger, v.29 p. 787 | 1893 PR 2 0. Sars, 
Urust. Norway, v.1l P- 388. 


Pleon well developed. Head usually produced into a deflexed rostrum. 
Side-plate 4 (except in Argissa, Fig. 70 p. 276) not conspicuously large, often 
smaller than 39, Eyes of various characters. Antenna 1 with accessory 
flagellum, peduncle longer, fagellum shorter in 9 than in d; antenna 2 
little or not longer than antenna 1 in O, eonsiderably longer in d. Lower 
lip (Fig. 71 p. 278), with inner lobes. Mandible robust, but palp slight, usually 
with very short 34 joint. Maxilla 1, inner plate with several setae, outer 
with (so far as known) 11 spines, 2@ joint of palp long. Maxilla 2, inner 
plate rather the broader, fringed on inner margin. Maxillipeds normal. 
Gmathopods 1 and 2 feeble, slender, not: very unequal, 5tk joint long, 6! 
shorter, subchelate or simple. Peraeopods 1 and 2 slight. Peraeopod 5 
usually the longest. Uropods 1 and 2, outer ramus the shorter; uropod 3, 
rami subequal. Telson long, cleft (except in Bruzelia, p. 274). > 


Marine. 


7 genera, 13 accepted species, 1 doubtful. 


Synopsis of genera: 


1 Ra aa 1. Gen. Bruzelia . . . p.274 
\ Telson deeply cleft — 2. : 

” DE BR ee a a RE le 2. Gen. Tiron . ... . p.275 
\ Eyes two, coalesced or separate, or none — 8. 


j Side-plate 4 larger than 34 (Fig. 70) — 4. 
\ Side-plate 4 not larger than 3d — 5. 


| Mandible, molar large; maxillipeds, outer plates 


4 GE monerate Be net, 3. Gen. Argissa . . . P.276 
] Mandible, molar very small; maxillipeds, outer 
Dlatevary large: Sa RE 4. Gen. Astyra. . . . p.278 
„ f Side-plate 3 not greatly expanded distally . . 5. Gen. Syrrhoites . . p.279 
° -) Side-plate 3 greatly expanded distally — 6. 
6 f Gnathopods 1 and 2 subehelate . ... . ... . 6. Gen. Syrrhoe . . . p.281 
\ Gnathopods Land 2 simple .. .... 2... 7. Gen. Pseudotiron . p. 284 
Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 18 


274 Bruzelia 


1. Gen. Bruzelia Boeck 


1871 Bruzelia (Sp. un.: B. typica), A. Boeck in: Forh. Selsk. Christian., 1870 
p-149 | 1876 B., A. Boeck, Skand. Arkt. Amphip., v2 p.477 |1893 B., G. O. Sars, 
Crust. Norway, v.1 p.394 | 1893 B., A. Della Valle in: F. Fl. Neapel, v.20 p. 667. 


Body stout, indurated. Head, rostrum deflexed, lateral corners broadiy 
rounded. Side-plate 3 slightly expanded below, 4" shorter, deeply excavate 
behind. Pleon segments 1—3 large, 22 and 34, postero-lateral angles acute. 
Eyes rudimentary. Antenna 1 rather short, aecessory flagellum 2- or 3-jointed. 
Antenna 2 in O rather, in 9 much longer. Upper lip carinate, broad, 
narrowing to truncate apex. Lower lip, inner lobes partially coalesced with 
outer. Mandible compact, cutting edge obscurely dentate, little prominent, 
molar large, not prominent, palp slender, 34 joint not or scarcely longer 
than 1%. Maxilla 1, inner plate with 10 setae, outer with 11(?) spines, 
palp long. Maxilla 2, inner plate broader than outer, fringed on inner margin. 
Maxillipeds, inner plates broad, outer reaching beyond middle of palp’s 
24 joint, fringed with spines on inner margin, finger of palp small. Gmatho- 
pods 1 and 2 similar, but 24 longer and thinner than 1%, 5th joint long, 
6" short, palm oblique, armed with a strong denticulate spine. Peraeopods 1 
and 2 very slender. Peraeopods3—5 stronger, 5% subequal to 4%, Uropodl, rami 
narrow, unequal; uropod 2, pedunele short, outer ramus narrow and short, 
inner long, broadiy lanceolate, unarmed; uropod 3, rami narrow, outer with 
spiniform terminal joint. Telson large, broadly lanceolate, entire. 

2 species. 


Synopsis of species: 


Rostrum spatuliform, peraeon smooth . ..» » 2 .... 1. B. typica. . . . p.274 
Rostrum acuminate, peraeon segments 3—7 tubereulately 
VBFTIIREO N TEE EU ES ESTER 2. B. tuberculata . p.275 


1. B. typiea Boeck 1871 B.t., A. Boeck in: Forh. Selsk. Christian., 1870 
p. 150 | 1876 B.t., A. Boeck, Skand. Arkt. Amphip., v2 p.478 t.10 £.3| 1898 B. t., 
G.O. Sars, Crust. Norway, v.1 p.395 t.138, t.139 f.1| 1893 B.t., A. Della Valle in: 
F. Fl. Neapel, v.20 p. 668 t.59 £. 76. 


Body extremely broad, subdepressed, back of peraeon vaulted above, lateral 
edges forming abrupt angle with side-plates. Pleon segments 1—3 dorsally 
carinate, produced to upturned point on segment 3, segments 4—6 smooth in oO, 
in d segments 5 and 6 armed with a dorsal projection, that on segment 5 
narrow linguiform, abruptly deflexed, ending in 2 setules. Head, rostrum 
apically abruptly deflexed and obtusely rounded, not reaching apex of 1°t joint of 
antenna 1. Side-plates 1—3 slightly widened distally, 5" and 6!" much broader 
than deep, hind lobe angular below. Eyes represented by an irregular patch of 
chalky white pigment. Antenna 1 in ©, 1° joint bent, stout, little longer 
than 24, 34 more than half as long as 24, flagellum scarcely as long as peduncle, 
with 8 joints, accessory flagellum small, 2-jointed; in S 1° joint of flagellum 
very large, densely filamented, accessory flagellum large, 3-jointed. Antenna 2 


in 9 rather longer than antenna 1, ultimate and penultimate joints of peduncle 


subequal, long, flagellum little more than half as long as peduncle, 7-jointed, in d 
filiform, very long, with about 12 long joints. Gnathopod 1, 5t® joint nearly 
twice as long as 6tk, 6th oblong oval, palm subequal to hind margin, defined 
by obtuse angle, the denticulate spine as in Syrrhoe erenulata (p. 282). Gnatho- 
pod 2, 5th and 6t% joints narrower and longer. Peraeopods 1 and 2, 5tk joint 
longer than 4!" or 6*h, fringed distally with long setae. Peraeopods 3—5, 


wu 


Bruzelia, Tiron 275 


24 joint narrowly oblong, hind margin smootb, 4" joint rather large, wide 
above, acutely produced. Uropod 3, outer ramus 2-jointed, a little shorter 
than inner, in © unarmed, in JS both rami fringed with plumose setae 
on inner margin. Telson about twice as long as broad at base, distally 
tapering rapidly, subacute apex minutely bidentate. Colour dark yellowish. 


'L. about 6 mm. 


Arctic Ocean, North-Atlantie, North-Sea and Skagerrak (Norway northward to 
Lofoten Islands). Depth 150-—564 m. 


2. B. tuberculata O. Sars 1882 B.t., G. O. Sars in: Forh. Selsk. Christian., nr. 18 
p- 95 t.4 f.7 | 1893 B.t., G. O. Sars, Crust. Norway, v.1 p.397 t.139 f.2 | 1893 B. t., 
A. Della Valle in: F. Fl. Neapel, 0.20 p.668 t.59 f.75. 


Body ratber stout and compact. Peraeon segments 3—7 and pleon 
segments 1—3 dorsally raised to obtuse tubereuliform processes. Lateral 


.margins of peraeon segments ‚forming keels, which are continued on pleon 


segments 1 and 2, and there produced into small teeth. Pleon segments 4—6 
dorsally smooth. Head, rostrum almost vertically deflexed, acuminate, over- 
lapping 1° joint of antenna 1. *Side-plates smaller than in B. typica. Pleon 
segment 3, postero-lateral angles more hook-like, with lower margin coarsely 
serrate. Eyes represented by rounded patch of whitish pigment at base of 
rostrum. Antenna 1 in O, 1° joint slightly curved, flagellum shorter than 
pedunele, 6-jointed, accessory flagellum as long as the 1° joint of flagellum, 
2-jointed. Antenna 2 in Q rather longer than antenna 1, ultimate and penultimate 
joints of peduncle subequal, flagellum about half as long as peduncle, 6-jointed. 
Gnathopods 1 and 2, peraeopods 1 and 2 as in B. typica. Peraeopods 3—5 
rather strong, not very unequal, 24 joint serrate on hind margin and in 
peraeopod 5 very broadly oval, 4! joint also much expanded above. Uropods 1 
and 2 nearly as in B. typica; uropod 3, rami scarcely longer than peduncle, 
both unarmed. Telson more than twice as long as broad, slightly constrieted 
near base, distally tapering to an acute simple point. Colour light yellowish 
with large irregular patches of diffuse briek-red. L. © 6 mm. 


Arctie Ocean and North-Atlantie (Lofoten Isles, Bejan in. Trondhjemsfjord). 


Depth 188—564 m. 


2. Gen. Tiron Lillj. 


1865 Tiron (Sp. un.: T. acanthurus), W.Lilljeborg in: N. Acta Soc. Upsal., ser.3 
v.6 or.1 p.19 | 1876 T., A. Boeck, Skand. Arkt. Amphip., v.2 p.475 | 1893 T., G.O. 
Sars, Crust. Norway, v.1 p.398 | 1893 T., A. Della Valle in: F. Fl. Neapel, v.20 p. 693 | 
1866 Syrrho& (part.)?, Goes in: Öfv. Ak. Förh., v.22 p.527 | 1868 Tessarops (Sp. un.: 
T. hastata) (non Rafınesque 1821, Arachnoidea!), A.M. Norman in: Ann. nat. Hist., ser.4 
v.2 p.412. 


Body not robust or indurated. Head, rostrum of moderate length. 
Side-plate 4 less deep than 34. Eyes 4, a subdorsal pair, and a minute 
lateral pair. Antenna 1 with long accessory flagellum: Antenna 2 longer than 
antenna 1. Upper lip rounded, bilobed, carinate. Lower lip with inner lobes. 
Mandible normal, molar large and prominent, palp slender, 34 joint scarcely 
longer than 1%. Maxilla 1, inner plate with many setae, outer with 11(?) spines, . 
palp long. Maxilla 2, inner plate fringed on inner margin, outer rather 
narrower. Maxillipeds normal. Gnathopods 1 and 2 long, setose, 5!" joint 
narrow, much longer than the linear simple 6%, finger small. Peraeopods 
short and stout, 29 joint much expanded in peraeopods 3—5, especially in 
ı18* 


pe 


276 Tiron, Argissa 


peraeopod 5. Uropods 1 and 2, outer ramus the shorter; uropod 3, rami 
long, lanceolate, subequal, outer. with small 29 joint. Telson narrow, very 
long, deeply cleft. 


l species. 


1. T. acanthurus Lillj. 1865 T.a., W. Lilljeborg in: N. Acta Soe. Upsal., ser. 3 
c.6 nr.1 p.19 | 1876 7. a., A. Boeck, Skand. Arkt. Amphip., v.2 p.475 t.9 £.8; t.13 
£.1 11898 T.a., 6.0. Be Crust. Norway, ®.1 p.399 t.140 | 1893 T.a., A. Della 
Valle in: F. Fl. Neapel, v.20 p.693 1.60 f.1 | 1866 Syrrhoe [?] bieuspis, Go&s in: Öfv. Ak. 
Förh., v.22 p.528 t.40 f.26 | 1868 Tessarops hastata, A. M. Norman in: Ann. nat, 
Hist., ser. 4 v.2 p.412 1.22 f.4—7. 


Pleon segments 1—3 dorsally serrate, with about 10 teeth, segments 4+—6 
dorsally produced to conically pointed process, smallest on segment 6. Head, 
rostrum reaching about middle of 15 joint of antenna 1, lateral corners nearly 
quadrate. Side-plates 1—3 rather narrow, distally erenulate, setose, 4!" slightly 
emarginate, obtusely triangular below, 5tt and 6", hind lobe deep, rounded. 
Pleon segment 3, postero-lateral angles minutely produced. Upper eyes rounded, 
dark red. Antenna 1 in oO, 1% joint nearly as long as 24 and 34 combined, 
flagellum longer than peduncle, 10-jointed, accessory flagellum half as long, 
5-jointed. Antenna 2 in 9 much longer, ultimate joint of peduncle shorter than 
penultimate, flagellum half as long as pedunele, 9-jointed. Antenna l in J, 
18 joint longer than 24 and 34 combined, flagellum more than twice as long as 
peduncle, 1° joint very long, densely fringed. Antenna 2 ind, flagellum longer 
than peduncle, 15-jointed. Gnathopods 1 and 2, 5t" joint distally narrowed, 
‘more than twice as long as 6", the small finger 2-jointed. Peraeopods 1 
and 2, 4 joint longer than 5th or 6, finger small. Peraeopods 3—5 
much stouter, 4 joint much larger than 6", especially in the 5tb pair. 
Uropod 3 reaching much beyond uropods 1 and 2, spinules- and setae on 
the rami more developed in C than in 90. Telson cleft nearly to the base, 
gradually tapering, apices acute, contiguous. Colour dark reddish brown, 
antennae banded with brown. L. Q 8, G 9 mm. 


Aretie Ocean, North-Atlantie, North-Sea and ag (Greenland, NONE: 
‘Great Britain); Kattegat. Depth 38—113 m. 


3. Gen. Argissa Boeck 


1871 Argissa (Sp. un.: A. typica), A. Boeck in: Forh. Selsk. Christian., 1870 
p.125 ı 1891 A., G. O. Sars, Orust. Norway, o.1 p.140 | 1893 A., A. Della Valle in: 

F. Fl. Neapel, v.20 p.686 | 1890 Chi- 
maeropsis (Sp. un.: ©. danica) (non 
Zittel 1887, Pisces!), Meinert in: Udb. 
Hauchs, v.3 p. 167. 


Body (Fig. 70) compressed. 
Head not or little rostrate. Side- 
plates decreasing from 1° to 34, 
4th Jarge, shield-like, little ex- 
cavate. Antenna 1 shorter than 
antenna 2, accessory flagellum 
small, with 2 joints, 24 minute. 

Fig. 70. A. halnatipes, ?. No calceoli. Upper lip slightly 

Lateral view. [After G.O. Sars.] notched. Mandible, euttin g ed ge 

and accessory plate dentate, many spines in spine-row, molar strong, palp 
slight, 34 joint longer than 24, Maxilla 1, inner plate with 2 or 3 setae, 24 joint 


TE vos 
a 


Argissa 277 


of palp distally widened. Maxilla 2, inner plate with lateral armature. 
Maxillipeds, plates moderate, outer with apical spines, inner margin simple, 
4th joint of palp spiniform. Gmathopods similar, not subchelate, 6 joint 
slender, much shorter and narrower than 5th, finger slender, feeble. Peraeo- 
pods 1 and 2 very small. Peraeopods 3 and 4, 24 joint moderately expanded, 
smaller in 4!" pair than in 34. Peraeopod 5, 24 joint large, descending 
much below 34, 4th and 5th joints laminar, setose; all peraeopods with 6 
and 7th joints small. Uropod 3, rami foliaceous, inner margin setose. Telson 
large, tapering, deeply cleft. 


2 species. 


Synopsis of species: 


en N RAR ARE BER 1. A. hamatipes . p. 277 
A FT I RE 2. A.stebbingi . p.277 


1. A. hamatipes (Norm.) 1869 Syrrhoe h., A. M. Norman in: Rep. Brit. Ass., 
Meet. 38 p.279 | 1893 Argissa h., T. Scott in: Rep. Fish. Board Scotl., v.11 p. 213 t.5 
f. 50, 31 | 1871 A. typica, A. Boeck in: Forh. Selsk. Christian., 1870 p. 125 | 1872 & 76 
4A.t., A. Boeck, Skand. Arkt. Amphip., v.1 t.7 f.2; v.2 p.206 | 1891 A.t., G. O. Sars, 
Crust. Norway, v.1 p.141 t.48 | 1893 A. t., A. Della Valle in: F. Fl. Neapel, v.20 
p- 687 t.59 f£.91 | 1890 Chimaeropsis danica, Meinert in: Udb. Hauchs, v.3 p. 167 t.2 
f. 4247. | 

Head longer than peraeon segments 1 and 2. Side-plate 1 distally 
widened and rounded, 24 and 34 triangular, 4" large, especially in Oo, 5th 
and 6! with hind lobe, much deeper than front. Pleon segments 4 and 5 
dorsally smooth in oO (Fig. 70), in JS dorsally produced, in segment 5 the 
expansion large, overarching segment 6. Eyes, each containing 4 small 
bigeminous lentieular bodies imbedded at the periphery of a common pigmentary 
mass (Sars). Antenna 1, 1° joint of peduncle as long as 24 and 32 combined, 
flagellum with 7 joints, in Q as long as peduncle, in @ much longer, in J 
the first 2 joints of flagellum fused and fringed with cilia. Antenna 2, 
ultimate joint of pedunele as long as antepenultimate, much shorter than 
penultimate, flagellum with 7 joints, in O subequal to last 2 joints of pedunele, 
in 9 to the whole peduncle. Gmathopods setose. Peraeopods 1—5, finger 
held at an angle to preceding joint. Peraeopods 3—5 with 29 joint glandular. 
Uropod 3, outer ramus with minute 24 joint. Telson in Q subtriangular, 
in d more regularly oval. Colour whitish, pellueid, orange-tinted on antennae 


‚and legs. L. 9 5, 0 6 mm. 


Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (Greenland; Norway, 
depth 38—188 m; Shetland; Firths of Forth and Clyde; S.W. of Belle Tle en Mer, 
depth 100 m); Kattegat. 


2. A. stebbingi Bonnier 1896 A. s., J. Bonnier in: Ann. Univ. Lyon, v.26 
P-626 1.36 f.4. | 


Pleon segment 5 in JS prolonged over 6!" in a salient apically rounded 
lamella. Head, lateral corners a little produced, obtuse; a vertical erest 
separates bases of antennae 1 and 2 of one side from antennae I and 2 of 
the other, the crest being divided by 2 emarginations into a bluntish rostrum, 
a truncate prominence, and a subacute projecting epistome reaching halfway 
along antepenultimate joint of peduncle of antenna 2. Pleon segment 3, postero- 
lateral corners quadrate. Eyes wanting. Antenna 1 in J, 34 joint fully half as 
long as 24, flagellum with 5 joints, together rather longer than pedunele. 1st densely 
clothed, longer than 24 and 34 joints of pedunele combined, accessory flagellum 


278 Argissa, Astyra 


less than half its length, 2-jointed. Antenna 2 in C twice as long, penultimate 
Joint of peduncle more than thrice as long as antepenultimate, nearly. twice aslong 
as ultimate, flagellum with 8 slender joints. Antenna 1 inoQ, 34 joint less than 
half 24, accessory flagellum as long as 1° joint of primary. Ahtenna 2 in O, 
penultimate joint of peduncle much shorter than in 9. Mandibular palp pro- 
portionally longer than in A. hamatipes (p. 277), 39 joint twice as long as 24, 
Maxilla 1, inner plate small, with 2 setae, outer with 7 spines, 24 joint of palp 
much dilated towards the apex. Maxillipeds, finger ending in a long and strong 
spine. Gnathopods 1 and 2, 6% joint very narrowly oval, hind margin carrying 
serrate spines and some long setae, finger ending in a little spine. Peraeo- 
pods 1—5 nearly as in A. hamatipes, but without glandular bodies in 24 joint. 
Uropods 1—3 and telson also similar, but outer ramus of uropod 3 without 
spiniform 24 joint. L. C nearly 5 mm, 9 a little smaller. 


Bay of Biscay. Depth 940 m. 


4. Gen. Astyra Boeck 


1871 Astyra (Sp. un.: A. abyssi), A. Boeck in: Forh. Selsk. Christian., 1870 p.133 | 
1876 A., A. Boeck, Skand. Arkt. Amphip., v.2 p.442 | 1892 A., G. ©. Sars, Crust. Norway, 
e.1 p.213 | 1893 A., A. Della Valle in: F. Fl. Neapel, «20 p. 69. 


Body tumid in front, integument thin. Head little produced in front. 
Side-plate 1 wider than 24 or 34, 4 obliquely truncate below emargination. 


Antennae 1 and 2 rather strong, not elongate, 1° with small accessory 


tlagellum, 24 rather the longer. Mouth-parts projecting below. Upper lip 


rounded, slightly emarginate. Lower lip (Fig. 71), inner lobes minute, 


contiguous, between widely separated outer lobes. Mandible, cutting edge rather 
wide, transversely dentate, accessor y plate on the left mandible, spines of spine- 
row numerous, molar weak, conical, 24 joint of palp much longer than 34, 
Maxilla 1, inner plate with several setae, 24 joint of palp long. Maxilla. 2, 
both plates short, broad, densely setose. Maxillipeds, inner plates moderate, 
outer large, reaching much beyond 24 joint of palp, inner margin spinose, 
palp rather short, stout, finger small. Gnathopods 1 and 2 not robust, sub- 
equal, scarcely subchelate, 5th joint much wider than 6*%. Peraeopods 1 and 2 
rather slender. Peraeopods 3—5 rather robust, 24 joint oblong, not widely 
expanded. Uropods 1—3, rami narrowly lanceolate, spinulose, peduncle very 
short and rami long in uropod 3. Telson small, deeply eleft. 


1 species. 


1. A. abyssi Boeck 1871 A. a., A. Boeck in: Forh. Selsk. Christian., 1870 
p.133 | 1876 A.a., A. Boeck, Skand. Arkt. Amphip., 0.2 p.443 t.9 f.4 | 1892 A.a,, 
G. OÖ. Sars, Crust. Norway, v.1 p.214 t.73 | 1893 A. «a., A. Della Valle in: F. Fl. Neapel, 
0.20 p.694 1.60 £.2. 


Back quite smooth. Head, rostrum short, blunt, lateral Re almost obso- 

lete, post-antennal linguiform, deflexed. Side-plate 1 distally expanded, 294 4th 
distally narrowed, 5t" rounded quadrate, slightly bilobed. Pleon 

R>N segment 3, postero-lateral eorners nearly quadrate, segment 4 

PD with deep dorsal depression. Eyes wanting. Antenna 1. 1° joint 

Fig. 71. A.abyssi. rather flattened, as long as 24 and 3X combined, flagellum 
Lower Hp. more than twice as long as peduncle, with 20—30 joints, 
[After G. ©. Sars.] 
flagellum delieate, 1-jointed. Antenna 2, peduncle rather stout, ultimate and pen- 
ultimate Jjoints subequal, carrying fascieles of setules, flagellum once and a half 


proximal 5—8 inflated, armed with sensory hairs, accessory = 


- Astyra, Syrrhoites 279 


as long as. pedunele. Gnathopod 1 rather stronger than gnathopod 2, 5th joint 


rather longer and much wider than 6", ending in a short rounded setose 
lobe, 6 joint narrow oblong, with no distinet palm, finger short, spinose 
on inner margin. Peraeopods 3—5, 24 joint having outside an elevated 
diagonal ridge, finger lanceolate, spinulose at the edges. Uropod 1, rami 


nearly equal; uropod 2, rami rather unequal; uropod 3 with the shortest 


. 


'peduncle, the longest rami, inner a little longer than the outer and longi- 


tudinally ridged. Telson rather longer than broad, eleft beyond middle, 
lobes distally diverging. Colour pale yellowish. L. © 8 mm. 


Arctic Ocean, North-Atlantie and North-Sea (North- and West-Norway). Depth 
188-564 m. 


-5. Gen. Syrrhoites 0. Sars 


1893 Syrrhoites (Sp. un.: S. serrata), G. O. Sars, Crust. Norway, v.1 p.391. 


: Body rather stout, compressed, carinate. Head, rostrum acute, deflexed, 
cheeks deep, inflated. Side-plates 1—-3 narrowly quadrangular. Eyes wanting. 
Antennae 1 and 2 subequal in O, in J antenna 2 the longer. Upper lip 
short, broad, distally truncate. Lower lip, inner lobes rather small, outer 
incised near apex on inner margin. Mandible stout, compact, cutting edge 


‘conical, not dentate, or only bidentate, spine-row wanting, molar a very 


broad, triturating surface, palp extremely slender, 34 joint not longer than 1°. 
Maxilla 1, inner plate with several setae, outer with 11 spines, palp long. 
Maxilla 2, inner plate the broader, fringed on inner margin. Maxillipeds, 
inner plates broad, outer broad, armed with unusually strong spines, 34 joint 
of palp linear, finger very small. Gnathopods 1 and 2 feeble, 5! joint 
twice as long as 6%, which is small, imperfeetly subchelate, palm very 
oblique, with no strong defining spine. Peraeopods 1 and 2 very slender 
and feeble. Peraeopods 3—5 much stronger, successively longer, 24 joint 
expanded oval. Uropods 1 and 2, outer ramus the shorter; uropod 3, rami 
lanceolate, subequal. Telson long, distally narrowed, deeply eleft. 


3 species accepted, 1 doubtf£ul. 


Synopsis of accepted species: 


Pleon segment 3, margin above postero-lateral tooth 


1 N TE N A 1. 8. serratus . . p.279 
| Pleon segment 3, margin above postero-lateral tooth 
simple — 2. 


j Pleon segments 1—3 with dorsal teeth inconspieuous 2. 8. fimbriatus . p.280 


R \ Pleon segments 1-—-3 with dorsal teeth conspieuous 3. 8. walkeri . . p.281 


1. S. serratus (O. Sars) - 1879 Bruzelia serrata, G.O.Sars in: Arch. Natury. 


‘ Kristian., «4 p.447 |1885 B.s., G. O. Sars in: Norske Nordhavs-Exp., ©.6 Crust.I 


p-182 t.15 £.3 | 1893 B.s., A. Della Valle in: F. Fl. Neapel, v.20 p.668 t.59 f.77,78| 
1893 Syrrhoites s., G. O. Sars, Crust. Norway, v.1 p.392 t. 137. 


Carinate throughout, peraeon segments 4—7 with carina raised to 
simple triangular processes, pleon segments 1—3 to a small and a large 
point, hinder on segment 3 upturned, on segments 4—6 likewise produced, 
on segment 4 with 2 points in ©, with only 1 in C, on segment 5 upturned 
in ©. much stronger and deflexed in C. Head, rostrum strongly deflexed, 
reaching apex of 1° joint of antenna 1, lateral corners rounded. Side-plate 3 
scarcely .expanded below, 4" rather less deep than 34, slightly emarginate, 


280 Syrrhoites 


triangular below. Pleon segments 1—3 very large, laterai corners of 1° 
rounded, of 24 a little produced, of 34 very acutely produced below a deep 
sinus, above which the margin is serrate with 5 upturned teeth. Eyes not 
even represented by pigment. Antenna 1 in Q, 1° joint a little longer 
than 24, 24 than 34, flagellum less than peduncle, 9-jointed, accessory flagellum 
small, 2-jointed. Antenna 2in 9 scarcely longer,ultimate joint ofpeduncle slightly 
shorter than penultimate, flagellum about half as long as peduncle. Antenna 1 
in CS, 1 joint as long as 24 and 34 combined, 1° joint of flagellum very 
long, with long sensory filaments, accessory flagellum much longer than in ©. 
Antenna 2 in d much longer, flagellum longer than peduncle. Maxillipeds, outer 
plates fringed with 8 unusually strong spines. Gnathopods 1 and 2 very 
small, 5th joint narrow, not tapering, palm of 6% subequal to and making 
very obtuse angle with hind margin, finger short, 2-jointed. Peraeopods 3—5, 
24 joint serrate on hind margin, 6!" joint very slender and long, especially 
on peraeopod 5. Uropod 3, rami intermediate in length between outer and 
inner ramus of uropods 1 and 2, outer ramus with short 24 joint. Telson 
oblong triangular, eleft more than ”/, of length, apices narrow, bidentate, 
contiguous. Colour yellowish grey. L. 8 mm. 


Arctic Ocean, North-Atlantie and North-Sea (West-Norway). Depth 282-658 m. 


2. S. fimbriatus (Stebb. & D. Roberts.) 1891 Syrrho& f., T. Stebbing & 
D. Robertson in: Tr. zool. Soc. London, ».131 p.34 t.5z | 1895 S. f., A. Della Valle 
in: F. Fl. Neapel, v.20 p.662 | 1895 S. f., A. O. Walker in: P. Liverp. biol. Soe., v.9 p. 304. 


Body faintly carinate, integument not indurated, peraeon segment 7 
and pleon segments 1 and 2 apparently produced dorsally to a small tooth; 
in the S only, pleon segment 5 has a tooth projecting over segment 6, and 
segment 6 is dorsally fringed with close-set spinules. Head curved in front 
to a strongly deflexed carinate rostrum. Side-plate 3 rather widened below, 
lower front corner rather acutely produced, 4th less deep, rounded below. 
Pleon segment 3, postero-lateral corners acutely upturned. Antenna 1 in O, 
1° joint longer than 24, 24 Jittle longer than 34, flagellum not longer than 
peduncle, with 6 joints, 1° not very long, accessory flagellum with 2 joints, 
24 minute. Antenna 2 in O subequal, ultimate and penultimate joints of peduncle 
subequal, flagellum much shorter than peduncle, 5-jointed. Antenna 1 in Q', 
1st joint longer than 24 and 34 combined, flagellum rather longer than 
peduncle, with 7 joints, 1° setose, as long as the other 6 combined, accessory 
flagellum with 3 joints, 1° long, 3% minute. Antenna 2 in d much longer, ulti- 
mate joint of peduncle long, a little longer than penultimate, flagellum longer than 
pedunele, about 12-jointed. Lower lip slightly ineised on inner margin of outer 
lobes, mandibular processes wide-spread. Mandible, ceutting edge seemingly 
not dentate in O, bidentate in 9, 34 joint of palp about as long as 1*t, 
tipped with 5 long setae. Maxilla 1, inner plate with 8 setae, outer with 
11 spines, spine-like setae on tip of palp’s 24 joint. Maxillipeds, inner plates 
broad, outer fringed with 8 spines of moderate size. Gmathopod 1, 24 joint 
distally widening, 5% not very slender, not twice as long as 6!", spinose on 
hind margin, 6tb broadest where the short hind margin forms very obtuse 
angle with tbe very oblique palm, finger short, abruptly narrowed at the 
centre. Gnathopod 2 more slender, 5!" joint twice as long as 6th, 6 ind 
with margins parallel all along, forming a minute palm much overlapped 
by the small curved finger; in © palm oblique, corresponding with an oblique 
row of spines on the hand of the Q'. Peraeopods 1 and 2 slight. Peraeo- 


> 3 ” MIN ; | ET 


Syrrhoites, Syrrhoe 281 


pods 3 and 4, 24 joint narrowly oblong oval, hind margin serrate. Peraeo- 
pod 5, 24 joint broadly oval, hind margin serrate. Uropod 1, peduncle 
shorter than inner ramus, more than twice as long as outer, which ends in 
a long spine. Uropod 2, peduncle a little longer than outer ramus, about 
half as long as the broadly lanceolate spinulose inner. Uropod 3, peduncle 
rather shorter than the subequal rami, outer ramus 2-jointed, both in C 
armed on inner margin. Telson nearly twice as long as broad, cleft beyond 
centre, apices acute, minutely notched. L. 1'5 mm. 


Firth of Clyde; Irish Sea (Calf of Man). 


3. S. walkeri Bonnier 1896 $. w., J. Bonnier in: Ann. Univ. Lyon, 2.26 p.647 
t. 38 £. 4. 


Carinate (apparently) throughout, hind segments of peraeon projecting, 
pleon segments 1—6 each prolonged into dorsal tooth, large on 1°t—3d, on 
34 upturned, in J tooth on 5! produced over 6*", 6th fringed with close-set 
spinules. Head carinate, rostrum strongly deflexed, acute, reaching apex 
of 1° joint of antenna 1, lateral corners forming straight-fronted lobe. Side- 
plates as in S. serratus (p. 279), unless 4! be a little deeper than 34. Pleon 
segment 3, postero-lateral corners strongly produced, acute, margin above not 
denticulate. Eyes wanting. Antenna 1 in 9, 1% joint ending in a small 
hook, 24 and 34 equal, flagellum subequal to peduncle, 9-jointed, accessory 
flagellum small, 2-jointed. Antenna 2 in Q equal to antenna 1, flagellum short, 
7-jointed. Antenna 1 in Cd‘, 34 joint shorter than 24, flagellum with 9 joints, 
1 as long as pedunele, longer than the other 8 combined, densely fringed 
with sensory filaments, accessory flagellum 3-jointed. Antenna 2 in C much 
longer, ultimate joint of peduncle rather longer than penultimate, flagellum 
longer than pedunele. Epistome salient. Upper lip long, rounded. Other 
mouth-parts nearly as in S. serratus, but maxilla 1, outer plate said to have 
12 spines, and maxillipeds have 11 spine-teeth of moderate size on outer 
plates, which reach apex of palp’s rather short 24 joint. Triturating lobes 
of stomach with 2 enormous spines in addition to the ordinary armature. 
Gnathopods 1 and 2 as in S. serratus, but palm defined by a strong spine. 
Peraeopods 1—5 similar to those of S. serratus but more slender, and 


‚6% joint in peraeopods 3—5 more elongate. Uropods 1—3 as in S. serratus. 


Telson elongate triangular, cleft to centre, apices notched. L. 7 mm. 
Bay of Biscay. Depth 950 m. 
S.levis (Boeck) 1871 Syrrhoel., A. Boeck in: Forh. Selsk. Christian., 1870 


p-148 | 1876 S.1., A. Boeck, Skand. Arkt. Amphip., e.2 p.473 | 1893 S.!., A. Della 
Valle in: F. Fl. Neapel, v.20 p. 662. 


L. 5 mm. 
Bömmelfjord (Moster [West-Norway]). Depth 282 m. 


6. Gen. Syrrhoe Goös 


1866 Syrrhoö (part.), Go&s in: Öfv. Ak. Förh., 0.22 p.527 | 1871 $., A. Boeck 
in: Forh. Selsk. Christian., 1870 p.147 | 1888 S., T. Stebbing in:, Rep. Voy. Challenger, 
v.29 p.788 | 1893 $., G. O. Sars, Crust. Norway, v.1 p.389 | 1893 Syrrhoe (part.), A. 
Della Valle in: F. Fl. Neapel, v.20 p. 662. . 


Body rather slender, integument thin. Head produced to sharp strongly 


| . deflexed rostrum. Side-plates rather smäll, 3% much the largest, distally 


282 Syrrhoe 


expanded, 4th very small. Eyes, when present, dorsal, eoalesced. Antennae 1 
and 2 slender, antenna 2 the longer, in d much the longer. Upper lip distally 
narrowed, rounded. Lower lip, inner lobes well developed, mandibular 


processes widely spread. Mandible, eutting edge and accessory plate dentate, 


spine-ow and molar normal, palp slender, 39 joint minute, tipped with long setae. 
Maxilla 1, inner plate with many setae, outer with 11 spines, palp rather 
long. Maxilla 2, plates subequal, inner fringed on inner margin. Maxillipeds, 
inner plates rather broad, outer not very, fringed with spines, palp normal. 
Gnathopods 1 and 2 feeble, slender, subchelate, palm transverse, armed with 
thumb-like denticulate spine. Peraeopods 1—5 slender; peraeopods 3—5 
successively longer, with 29 joint expanded, serrate on hind margin. Uro- 
pods 1 and 2, outer ramus much the shorter; uropod 3, outer ramus a 
little the shorter, 2-jointed. Telson long, deeply cleft. 


3 species. / 


Synopsis of species: 


1 j Pleon segment 3, postero-lateral margin not serrate 3. 8. papyracea . . P.283 
\ Pleon segment 3, postero-lateral margin serrate — 2. 


Pleon segment 3, postero-lateral margin wholly 
2 I RR RE ER ET RRE Sa r EEE . 1. 8. crenulata . . p.282 
Pleon segment3, postero-lateral margin partly serrate 2. 8. semiserrata . p.283 


1. S. erenulata Goes 1866 $.c., Goös in: Öfv. Ak. Förh., 0.22 p.527 t.40 
f.25 | 1876 S.c., A. Boeck, Skand. Arkt. Amphip., ©.2 p.471 t.9 f.5; t.12 f.4 | 1893 
8. c., G. ©. Sars, Crust. Norway, v.1 p.390 t.136 | 1893 S. c. (part.), A. Della Valle in: 
F. Fl. Neapel. v.20 p. 663 t.59 f. 74. 


Body nearly eylindrical, peraeon segment 7 and pleon segments 1—3 
dorsally serrate. Head strongly vaulted in front, rostrum reaching beyond 
middle of 1°: joint of antenna 1. Side-plates 1 and 2 narrow, directed. for- 
ward, 39 nearly securiform, front margin sloping forward, hind lobe narrowly 
truncate beneath deep emargination which receives side-plate 4. Pleon 
segments, postero-lateral angles in 24 a little produced, acute, in 3 nearly 


quadrate, hind margin above sinuous, serrate with upturned teeth, nearly 


meeting the dorsal serration. Eyes forming a large dark red dorsal mass. 
Antenna 1 in 9, 1% joint with apical tooth, 29 a little shorter than 1°, 
34 than 24, flagellum slender, rather longer than peduncle, 18-jointed, 
accessory flagellum with 3 joints, 39 minute. Antenna 2 in oa little longer, 
ultimate joint of peduncle rather longer than long penultimate, both setulose, 


flagellum half as long as peduncle. Antenna 1 in C, 1° joint fully as long as24 


and 39 combined, flagellum very long, 1° joint very large, densely fringed, 
others rather long, accessory flagellum with laminar 1° joint. Antenna 2 ind, 
flagellum very long, filiform, joints short, numerous. Upper lip, partly 


carinate. Gnathopod 1, 5th joint about twice as long as 6%", which is oblong 


triangular, widening distally and dense with delicate setae, tip “of finger 
erossing the palmar spine. (Gnathopod 2 similar, but longer and more slender, 
5th joint about once and a half as long as the narrow 6%. Peraeopods 3—5, 
24 joint coarsely serrate on hind margin, largest and produced downward 
in peraeopod 5, which has 5! and 6 joints elongate. Uropod 3, the 
lanceolate rami setose on inner margin. Telson long, lanceolate, nearly 
thrice as long as broad, eleft ?/,—-?/, of length, apices acute (bidentate Goös), 


contiguous. Colour variable, variegated with yellow, white and pink, side- 


a ee let 1 Sa An mn Tr De 5 Lu ae Sarah... RE HE Ve ie 1 an. 


a Wann a (,) 334 En 7, Mena ln Bars u An a FRE S  r  Ar va hd l 


dr a re Fa 


Syrrhoe 283 


r plates and other parts coral-red, antennae and limbs banded with orange. 


L. © 10 mm, © less. 


Arctie Ocean, North-Atlantic, North-Sea and ie Sg (Greenland, Spitzbergen, 
Norway). Depth 38—188 m. 


2. S. semiserrata Stebb. 1888 S. s., T. Stebbing in: Rep. Voy. Challenger, 


0.29 p.793 t.51 | 1893 S.s., A. Della Valle in: F. Fl. Neapel, 0.20 p.663 t.59 f.72, 73. 


© unknown. — d.. Peraeon segment 7 and pleon segments 1 and 2 
dorsally produced into a small tooth. Head strongly vaulted in front, 
rostrum carinate, reaching beyond middle of 1° joint of antenna 1. Side- 


' plates 1—4 nearly as in S. crenulata. Pleon segments, postero-lateral 


angles in 2 a little produced, acute, in 39 not produced, hind margin 
above cut into 8 upturned teeth not nearly reaching the unserrated dorsum. 
Eyes as in S. erenulata, colour not known. Antenna 1, 1° joint thick, 
longer than 24 and 34 combined, 1° joint of flagellum nearly as long as 
pedunele, densely fringed, accessory flagellum about as long as 1° joint of 
primary, slender, serrate, setae along one side and spines along the other. 
Antenna 2, ultimate joint of pedunele much more than twice as long as penulti- 
mate, penultimate nearly twice as long as antepenultimate, flagellum with at 
least 20 joints, which are slender, not short. Mandible, 3 spines in spine-row. 
Maxillipeds, outer plates fringed with 11 spines. Gmathopod 1, 5% joint 
fusiform, nearly twice as long as 6%, which widens a little distally, spinulose 
along hind margin, palm short, setose, the palmar spine with blunt process 
near the base and 7 oblique dentieles on its concave margin, finger short, 
hooked, stout at base. Gmathopod 2, 34 joint longer than 4", 5th narrow, 
slightly bent, nearly twice as long as 6%, which scarcely widens distally, 
hind margin spinulose and finely pectinate, palmar spine without the blunt 
process. Peraeopods 1 and 2 very slieht. Peraeopods 3—5, 24 joint not 
very large, the serration not coarse. Uropod 1, peduncle longer than rami, 
outer ramus much shorter than inner; uropod 2, outer ramus narrow, longer 


‘ than inner ramus of uropod l, inner ramus very long, broad, spinose on both 


margins; uropod 3, rami long, lanceolate, fringed with setae on inner 
margin, outer a little the shorter, with small 24 joint. Telson long, deeply 
«left, character of apices uncertain. L. 7:5 mm. 


Bass-Strait. Depth 60 m. 


3. S.papyracea Stebb. 1888 S. p-., D. Stebbing in: Rep. Voy. Challenger, v.29 
p- 789 t. 50 | 1893 S. p., G. O. Sars, Crust. Norway, v.1 p.390 | 1893 S. erenulata 


(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 663. 


Peraeon segment 7 and pleon segments 1—4 dorsally serrate, the 
central tooth most prominent on pleon segment 2. Head produced and 
sharply eurved at base of sharp-edged rostrum. Side-plates 1—4 nearly 
as in S. crenulata, but 3% with a more quadrate hind lobe. Pleon segments 2 
and 3, postero-lateral angles acutely produced, more strongly in 24 than 34, 
margin above not dentieulate. Eyes not perceived. Antenna 1 in oO, 
1° joint with no large apical tooth, 24 joint rather shorter than 1°, 34 than 
24, flagellum longer than peduncle, with 15 joints or more, 1° longest, 
accessory flagellum with 2 long joints and 1 very short. Antenna 2 much longer, 
ultimate joint of peduncle as long as the short antepenultimate and long pen- 
ultimate combined, flagellum shorter than peduncle, with 18 unequal joints. 
Mandible, spine-row of 6 spines. Maxillipeds, outer plates fringed with 16 spines, 
34 joint of palp longer than in the other species, finger with a nail as long 


EN WE N MR 
2 A NE re re une 


284 Syrrhoe, Pseudotiron 


as the basal part. Gnathopod 1, 5tR joint fusiform, more than twice as 
long as 6%, hind margin densely fringed, 6t% short, widening distally, hind 
margin pectinate, palm slightly oblique, sinuous, setose, the palmar spine 
with 7 or 8 denticles, finger reaching a little beyond the palm. Gmathopod 2, 
34 joint shorter than 4", 5tk Jong, narrow, spinose, more than twice as 
long as 6%, which is longer, and narrower than in gnathopod 1, scarcely 
widened distally, armature similar. Peraeopods 1—5 much as in S. crenulata 
(p. 282), but 24jointin peraeopods 3—5 less strongly serrate. Pleopods, peduncles 
with small interlocking process at apex, coupling spines large, 4 cleft spines 
on 1° joint of inner ramus. Telson not twice as long as broad, cleft a 
little beyond middle, apices acute, with small lateral tooth above. L. 12 mm. 


Tropical Atlantie (Virgin Island Culebra). Depth 713 mm. 


7. Gen. Pseudotiron Chevreux 


1895 Pseudotiron (Sp. un.: P. bowvieri), Chevreux in: Bull. Soc. zool. France, 
v. 20 p. 166. 


Body compressed, not indurated. Head triangular (as in Synopia, p. 271), 
more advanced in J than in ©. Side-plate 3 the largest, greatly excavate 
(as in Syrrhoe, p. 281). Eyes (as in Argissa, p. 276) small, imperfectly deve- 
loped. Antenna 1 in S much shorter than antenna 2; accessory flagellum 
3-jointed. Mouth-parts and gnathopods nearly as in Tiron (p. 275). Man- 
dible normal, cutting edge and accessory plate dentate, spine-row of several 
spines, prominent molar, but palp very slender, 34 joint scarcely longer than 
broad. Maxilla 1, inner plate with several setae, outer with usual spines, 
24 joint of palp broad at apex. Maxilla 2, inner plate the broader with inner 
margin partially fringed. Maxillipeds, inner plates normal, outer armed 
with 3 long and 5 stout spine-teeth, palp rather long, finger long. Gnatho- 
pods 1 and 2 long, slender, simple, setose. Peraeopods 1 and 2 short, 
stout, finger short, hooked. Peraeopods 3—5, 24 joint expanded, 6!h very 
short, finger small, hooked. Uropods 1 and 2, rami unequal; uropod 3, 
pedunele short, rami long, broad, subequal, spinulose. Telson long, lanceolate, 
eleft nearly to base. 1 


l species. 


1. P. bouvieri Chevreux 1895 P.b., Chevreux in: Bull. Soe. zool. France, v.20 
p- 166 £.1—14. 


Peraeon smooth. Pleon segments 1—3, hind margin denticulate, segment 4 
with 3 dentieles, segment 5 with 1 long tooth extending over segment 6. Side- 
plate 1 distally expanded, 34 with straight front margin, hind part reetangular 
below emargination, 4!" much smaller, obliquely produced and rounded below a 
slight emargination. Pleon segment 3, postero-lateral angle a little produced, 
acute. Eyes in Q, a group of 4 small lenses near front margin of head 
(compare Argissa, p. 276), not observed in d. Antenna 1 in ©, 1° joint 
rather longer than 34, 24 much shorter than either, flagellum a little longer 
than peduncle, 9- or 10-jointed, accessory flagellum small. Antenna 1 in C, 
1% joint much longer than 24 and 34 combined, flagellum considerably 
longer than pedunele, 1% joint much the longest, fringed, longer than the 
3-jointed accessory flagellum. Antenna 2 in C, ultimate joint of peduncle 
shorter than penultimate, flagellum much longer, 23-jointed. Gmnathopods 1 
and 2, 34 and 4th joints very short, 5th joint long and slender, 6th linear, 


. a DA Te a A al ee Tr AN, Baal b Man. en 
NEST ee Ehe PERL EEE NEE 


4 


Pseudotiron, Calliopiidae - 285 


in gnathopod 1 half as long as 5", in gnathopod 2 °/, as long as th, 
finger rather long, nearly straight. Uropod 2 the smallest. Uropods 1 and 2, 
the inner ramus the shorter (Chevreux, but?). Uropod 3, outer ramus armed 
with 3 rows of spinules, inner with a row of setules. Telson, apices subacute, in 
figure a little divergent. Colour pellueid. L. 9 5 mm. 


Mediterranean (North of Tunis). Depth 170 m. 


"22. Fam. Calliopiidae 
1893 Calliopiidae, G. O. Sars, Crust. Norway, v.1 p.431. 


Body compressed or with broadly vaulted peraeon, with or without 
dorsal teeth. Head, rostrum unimportant. Side-plates small or of moderate 
size. Antenna 1, peduncle usually short, accessory flagellum 1-jointed or 
wanting. Upper lip rounded or faintly bilobed. Lower lip with inner lobes 
small or wanting. - Other mouth-parts varying little from the normal. 
In Laothoes (p. 286), however, the palp of maxilla 1 is abnormally small, 
and the outer plates of maxillipeds are abnormally large. In Sancho (p. 288), 
and perhaps also in Paraleptamphopus (p. 294), the gnathopods (Fig. 72, 73) 
show striking sexual differences. Gnathopods 1 and 2 usually feeble, sub- 
chelate. Marsupial plates large, broad. Uropod 3, inner ramus much, or 
more usually little, longer than outer. Telson entire, sometimes a little 
notched or emarginate. 


Marine, generally distributed; rarely in wells. 
15 genera accepted, 1 imperfectly known, 29 accepted species, 8 obscure. 


Synopsis of accepted genera: 


j Lower lip without inner lobes — 2. 
\ Lower lip with inner lobes.— 8. 


jest 


Maxilla 1, palp very small; maxillipeds, 

outer plätes very large; ER 1. Gen. Laothoes. . ... . p. 286 
Maxilla 1, palp not very small; mas 

peds, outer plates not very large — 8 


| Back broadly vaulted — 4. 
\ Back not broadly vaulted — 6. 


Antenna 1 without accessory flagellum; 
| telson. nobched .. ..:,2... anna, 2. Gen. Chosroes. . ... . p: 287 
| Antenna 1 with accessory flagellum; 
telson not notehed — 5. 


B 


o 


in 


Maxillipeds, outer plates smaller than 


EI EN u RE 8. Gen. Sancho. ..... . . .- p. 288 
$; | Maxillipeds, outer plates larger than 
ER A .. .. 4. Gen. Amphithopsis . . . p.289 
6 Body with some segments dorsally dentate 5. Gen. Halirages. . ... . p. 290 
Body without dorsally dentate segments — 7. 


Antenna 1 without accessory flagellum; 


uropod 3, rami unequal. ..... 6. Gen, Leptamphopus . . . P.293 
san 1 with accessory flagellum; 


uropod 3, rami equal... .... . 7. Gen. Paraleptamphopus . p. 294 


{ Telson at apex smoothly rounded —- 9. 
Telson at apex acute or notched — 10. 


1 


x 


286 : Calliopiidae, Laothoes 


l Peraeopod 5 of moderate length, finger 
9: DRIVER. N a a an 8. Gen. Calliopius . .. . . p: 295 
| Peraeopod 5 very elongate, finger straight 9. Gen. Paracalliope . . . . p.297 


0 | Telson notehed — 11. 


1 \ Telson not notehed — 12. 
Side-plates 1—4 rather deep; mandible 
u | with eutting edge outdrawn.. . . . 10. Gen. Harpinioides . . . . p.298 
| Side-plates 1---4 rather shallow ; mandible 
with cutting edge not outdrawn . . 11. Gen. Atylopsis. ..... p- 299 


j Antenna 1 longer than antenna 2 — 18. 


ir \ Antenna 1 not longer than antenna2— 14. 
13 Body with some segments dorsally dentate 12. Gen. Cleippides . . . . . p- 300 
Body without dorsally dentate segments 13. Gen. Stenopleura . . . . p.302 
| Side-platesshallow, 4thnotdeeperthanlst 14. Gen. Haliragoides . . . . p.308 
14 ? Side-plates not very shallow, successively 
| deeper to the 4h ........ 15.. Gen. Apherusa .... .. p: 304 


1. Gen. Laothoes Boeck 


1871 Laothoös (Sp. un.: L. meinerti), A. Boeck in: Forh. Selsk. Christian., 1870 
p- 202 | 1876 L., A. Boeck, Skand. Arkt. Amphip., v.2 p.360 | 1890 L., T. Stebbing 
in: Ann, nat. Hist., ser. 6 v.5 p.194 | 1893 Laothoe (non J.C. Fabrieius 1807, Lepi- 
doptera!), G. O. Sars. Crust. Norway, v.1 p.453 | 1893 Thoelaos, A. Della Valla in: 
F. Fl. Neapel. v.20 p. 592. 


Side-plates not very large. Antennae 1 and 2 slender, antenna 1 
the shorter, peduncle short, no accessory flagellum. Mouth-parts much pro- 
jeeting. Upper lip rounded triangular. Lower lip without inner lobes. 
Mandible normal, strong, accessory plate on both, 34 joint of palp shorter 
than 24. Maxilla 1, inner plate with 5 setae, outer with strong spines, palp 
very small, 24 joint rudimentary, nodiform. Maxillipeds, inner plates normal, 
outer very large, broad, reaching almost to extremity of palp, with dentate 
inner margin. Gnathopods 1 and 2 feeble, 5!" and 6th joints narrow, rather 
long, palm very short. Peraeopods 3—5, 24 joint oval, largest in peraeopod 5. 
Uropod 2, outer ramus much the shorter; uropod 3, rami long, subequal, 
lanceolate. Telson entire. 


1 species accepted, 1 uncertain, 


1. L. meinerti Boeck 1871 L. m., A. Boeck in: Forh. Selsk. Christian., 1870 
p-202 | 1876 L. m., A. Boeck, Skand. Arkt. Amphip., v.2 p.361 | 1893 L. m., Laothoe m., 
G.O. Sars, Crust. Norway, v.1 p.454 t. 160 | 1893 Thoelaos meinertü, A. Della Valle 
in: F. Fl. Neapel, v.20 p. 592. 


Body rather long and eylindrie. Head, rostrum very small, lateral corners 
deflexed, rounded, post-antennal quadrate.. Pleon segment 3, postero-lateral 
corners almost quadrate, the margins slightly convex. Eyes oblong oval, widened 
below, light red. Antenna 1 in O not half as long as the body, 1°* joint thick, 
Imuch longer than 24 and 3X combined, flagellum setiferous, of many short joints, 
about 4 times as long as peduncle. Antenna 2 considerably longer, ultimate 
and penultimate joints of pedunele subequal, flagellum fully thrice as long as 
peduncle. Gnathopod 1, 5" joint fusiform, as long as narrowly oblong 6*", palm 
nearly transverse, scarcely half as long as hind margin. Gnathopod 2 rather 
longer, 5t" joint widest distally, as long as the narrow, almost linear 6th, 
Peraeopods 1—5 moderately slender, 24 joint in peraeopods 3—5 with smooth 


DEE Tin Ku Lab er 
RAR SLR 


Laothoes, Chosroes 287 


hind margin. Uropod 3, rami about twice as long as peduncle, fringed with 
spinules only. Telson oval quadrangular, with apex broad, faintly emarginate. 
Colour pellueid, yellowish, indistinetly banded with orange; ova in pouch 
pale violet. L. 0 8 mm. 


Aretie Ocean, North-Atlantic and North-Sea (Hardangerfjord, depth 565—942 m; 
Trondhjemsfjord; Nordland). 


L. carcinophilus (Chevreux) 1889 Paramphithoe careinophila, Chevreux in: 
Bull. Soe. zool. France, v.14 p.288 f. | 1893 P. e., Acanthozone?, A. Della Valle in: F. Fl. 
Neapel, v.20 p. 619. 


L. 7 mm. 


North-Atlantie (Azores, between Pico and San Jorge, depth 620 m, and off 
Flores, depth 1386 m). From the carapace of Geryon sp. 


2. Gen. Chosroes Stebh. 


1888 Chosroes (Sp. un.: C. ineisus), T. Stebbing in: Rep. Voy. Challenger, 
v.29 p. 1208. 

Back of peraeon broadly vaulted in front, with side-plates laterally out- 
spread, pleon segments 4—6 folded under, 5!" and 6!" not very short. Head, 
rostrum minute. Side-plate 1 small. Antenna 1 the shorter, without accessory 
flagellum; both 1° and 24 antennae calceoliferous. Upper lip rounded. Lower 
lip without inner lobes. Mandible normal, palp very large, 34 joint longer 
but narrower than 24. Maxilla 1, inner plate with 2 or 3 setae, outer with 


. 11 spines. Maxilla 2, inner plate only partially fringed on inner margin. 


Maxillipeds, outer plates scarcely reaching middle of palp’s 24 joint, inner 
margin fringed with submarginal spinules, palp rather elongate, finger short 


with a short sharp nail. Gnathopods 1 and 2 small, similar, 5t" joint rather 


elongate, palm rather short, slightly oblique. Peraeopods 1 and 2, 24 joint 
partially dilated; peraeopods 3—5, expanded 2 joint notched, 4" joint in 
all broad, not long. Uropods 1 and 2, outer ramus the shorter; uropod 3, 
rami subequal, lanceolate. Telson slightly notched. 


1 species. 


1. C.incisus Stebb. 1888 C.i., T. Stebbing in: Rep. Voy. Challenger, v.29 
p:1209 t.134, 135 | 1893 Acanthozone incisa, A. Della Valle in: F. Fl. Neapel, v.20 p.614 
t. 59 f. 26. z 


Body dorsally very wide at middle of peraeon, pleon segment 6 
considerably longer than 5th. Side-plate 4 deeply emarginate, 5" broad, 
the lobes about equal in depth. Eyes :broadly oval, wide apart, lenses 
numerous. Antenna 1, 1° joint stout, a little longer than 24, and 24 than 34, 
flagellum about twice as long as peduncle, with more than 34 joints, short, 
distally a little widened, these and last 2 joints of pedunele with many small 
calceoli. Antenna 2 decidedly longer, ultimate joint of peduncle longer than 
penultimate, flagellum longer than pedunele, with more than 24 joints, short, 
broad, ealeeoliferous. Triturating lobes at entrance of stomach with short 
curved and long straight spines. Gmathopod 1, 5tk joint somewhat expanded 
in the middle, 6!" equally long, broader, oval, palm slightly convex, shorter 
than hind margin, defined by a group of palmar spines. Gmnathopod 2 similar 
but more elongate. Peraeopods 1 and 2, 24 joint expanded into a broad 
lobe near but not at the apex, 5th joint longer than 4th, 6" than 5th, finger 
short. Peraeopods 3—5, 24 joint broad, hind margin deeply notched below 
the middle. Marsupial plates large. Uropods 1 and 2, outer ramus shorter 


RENT UE RER ER ER 


a8 
a SZ, 


288 Chosroes, Sancho 


than inner; uropod 3, rami equal, broadly lanceolate, inner with spines and 
setae on both margins, outer with spines and setae on inner, groups of spines 
on outer margin. Telson as long as peduncle of uropod 3, not twice as 
long as broad, a short triangular notch separating 2 rounded apices, sides 
convex in young, slightly concave in adult. L. 10 mm. 


Strait of Magellan (Cape Virgins). Depth 100—128 m. 


3. Gen. Sancho Stebb. 


1897 Sancho (Sp. un.: 5. platynotus), T. Stebbing in: Tr. Linn. Soc. London, ©: 


ser.2 0.7 p.42. 


Back of peraeon broadly vaulted, with side-plates laterally outspread, 
pleon narrow, segments 3—6 folded under. Head with angular front. Eyes 
dorsal, separate. Antenna 1 with short pedunele, accessory flagellum small, 
l-jointed. Antenna 2 not mueh longer than antenna 1. Upper lip broader 
than long. Lower lip without inner lobes. Mandible, cutting edge, accessory 
plate and spine-row small, molar and palp powerful. Maxilla 1, inner plate 
with 2 setae, outer with 11 spines, small and inconspieuously denticulate. 
Maxilla 2, inner plate broader than outer, not fringed on inner margin. 
Maxillipeds, inner plates broad, outer smaller than, and scarcely reaching 
beyond, the inner, palp well developed, finger small. Gnathopod 1 (Fig. 72) 
feeble, subchelate. Gnathopod 2 in © similar to gnathopod 1, in C (Fig. 73) 
very elongate, with 6% joint massive. Peraeopods 1 
longest. Uropods 1—3, outer ramus shorter than inner. Telson small, entire. . 


1 species. 


1. S. platynotus Stebb. 1897 S. p., T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 0.7 p.42 t.9A. 


Peraeon segment 1 very short, segment 7 longer; flexing of pleon 
begins at the 24 segment. Head dorsally flattened. Side-plate 1 distally a 
little widened, 4% the largest, emarginate behind, serrulate below the excavation. 

Fig. 72, Pleon segments 1 and 2, postero-lateral eorners 
minutely produced. Eyes round, wide apart on top 
of head, light pinkish in spirit. Antenna 1, 1° joint 
longer than 24 and 34 combined, flagellum in C 
4 times as long as pedunele, with 41 joints, the 1° 
slightly longer than 34 joint of peduncle, and longer 
than accessory flagellum. Antenna 2, ultimate 
joint of peduncle longer and thinner than pen- 

24 joint 5% joint ultimate, both spinose, flagellum nearly as in 
Fig, 78. antenna 1. but setuliferous. Upper lip, distal 

Fig. 7 em. 8. platynotus, 5. margin almost straight. Mandible, 3° joint of 

nathopods 1 and 2. ; . & ß 

palp as long as 24, wide, with spines on oblique 
apex. Maxillipeds. outer plates fringed with slender spines on the inner 
margin, 39 joimt of palp narrower but not much shorter than 24, finger. 
short, tipped with spinules. Gnathopod 1 in C (Fig. 72), 5% joint considerably 
longer and narrower than the 6%, which is rather longer than broad, palm 
short, nearly transverse, with small finger to match; in the Q 5!" and 
6 joints narrow, not very long, subequal, 6% rather the longer. Gnatho- 
pod 2 in G (Fig. 73), 24 joint narrewer at base, a little widened near the 
middle, 5!" joint subfusiform, shorter and strikingly narrower than the massive 


5 normal, 5tb the 


Sancho, Amphithopsis 289 


rotundo-quadrate 6%, which has the front margin straight, the hinder curved, 
slightly crenulate, palm broad, almost transverse, divided into 3 or 4 irre- 
gular teeth, finger smooth, eurved, elosing down into a pocket excavate in 
thiekness of 6% joint; in the 9 5! and 6tk joints almost as in gnatho- 
pod 1, feeble, but rather more elongate. Peraeopods 1—5, 4 joint a 
little widened and produced, finger small, with spinule on inner margin. 
Peraeopods 1 and 2 rather short; peraeopod 3, 24 joint tending to oval; 
peraeopods 4 and 5, 24 joint more oblong, fringed on both margins with 
long setae, hind margin nearly straight, produced downward, especially in 
peraeopod 5, which has numerous spines and spinules on the narrow, 
elongate, subequal 5% and 6th joints. Uropod 2, peduncle as long as in 
uropod 1 and rami longer than in uropod 1. Uropod 3, pedunele short, 
apically dentate, outer ramus much shorter and narrower than inner. 
Telson scarcely as long as peduncle of uropod 3, as broad as long, margins 
strongly convex, rather abruptly converging to the obtuse apex. L. (without 
fiexed part of pleon) about 3 mm. 


Port Jackson [East-Australia]. 


4. Gen. Amphithopsis Boeck 


1861 Amphithopsis (part.), A. Boeck in: Forh. Skand. Naturf., Mode 8 p. 661 | 
1876 A., A. Boeck, Skand. Arkt. Amphip., «2 p.349 | 1893 A., G. O. Sars, Crust. 
Norway, v.1 p.455 | 1894 A., T. Stebbing in: Bijdr. Dierk., v.17 p. 36. 


Back of peraeon broadly vaulted, with side-plates laterally outspread, 
pleon segments 5 and 6 dorsally not very short. Head, rostrum small, 
post-antennal corners not produced. Antennae 1 and 2 long, slender, 
subequal, accessory flagellum very small. Upper lip distally narrowed, 
rounded. Lower lip without inner lobes. Mandible normal, 34 joint ot 


palp large. Maxilla 1, inner plate with several setae. Maxilla 2, inner 


plate only partially fringed on inner margin. Maxillipeds normal, rather 
robust. Gnathopods 1 and 2 small, subequal, 5t% joint rather elongate, 
palm short, transverse. Peraeopods 3—5, 24 joint oval, peraeopods 4 
and 5 much longer than peraeopods 1—3. Uropods 1—3, outer ramus 
much shorter than inner. Telson small, entire. 


1 species. 


1. A. longiecaudata Boeck 1861 A.1.,, A. Boeck in: Forh. Skand. Naturf., 
Möde 8 p. 663 | 1876 A.1., A, Boeck, Skand. Arkt. Amphip., v.2 p.351 t.22 f.3 | 1893 
A.1., G. O.Sars, Crust. Norway, v.1 p.456 t.161 | 1893 Acanthozone Il. (part.), A. Della 


"Valle in: F. Fl. Neapel, v.20 p. 605 t. 59 f. 17. 


Peraeon segment 7 longest. Head, rostrum rather prominent, lateral 
sorners narrowly rounded. Side-plates close set, 1° distally expanded. Pleon 
segment 3, postero-lateral angles quadrate, produced point scarcely percep- 
tible. Eyes irregularly round, light red. Antenna 1 rather longer than the 
body, 1° joint a little longer than 24, 24 about twice as long as 34, flagellum 5 
times as long as pedunele, brittle, many-jointed, setulose, accessory flagellum 
linear, 1-jointed, about as long as 1° joint of primary. Antenna 2 subequal to 


‚antenna 1, less slender, ultimate joint of peduncle longer than penultimate, both 


of. these together with proximal part of flagellum densely setose, flagellum more 
than twice as long as peduncle. Gnathopod 1, 5tk joint somewhat expanded in 
the middle, 6!" subequal in length, widening distally to transverse palm, which is 
about half as long as hind margin. Gnathopod 2 scarcely longer, more slender, 


Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 19 


290 Amphithopsis, Halirages 


6b joint narrower, with shorter palm. Peraeopods 1 and 2 rather slender. 
Peraeopods 3—5 rather robust, 29 joint with hind margin smooth, finger in 
all peraeopods large, with 2 dentieles near the curved apex. Uropod 2 
reaching beyond uropod 1, and about as far as uropod 3, which has outer 
ramus scarcely '/; as long as inner. Telson oval triangular, apex obtusely 
pointed. Colour Dellueid, "whitish, mottled in bands with light red; ova in 
pouch bluish green. L. © 7 mm. 


Arctic Ocean, North-Atlantie and North-Sea (Norway). Depth 94—282 ın. 


5. Gen. Halirages Boeck 


1871 Halirages (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.194 | 1876 
H., A. Boeck, Skand. Arkt. Amphip., 0.2 p.337 | 1893 H., @G. 0. Sars, Crust. Norway, 
v. N p- 435. ö 


Body slender, with some segments dentate. Head, post-antennal 
corners acute, not strongly produced. Side-plates 1—4 rather shallow. 
Antennae 1 and 2 elongate, with small ealceoli in several rows. No accessory 
flagellum. Upper lip rounded. Lower lip without inner lobes. Mandible 
normal, palp large, 3% joint curved. Maxilla 1, inner plate with ‚several 
(5 or 6) setae, outer with 11 spines. Maxilla 2, inner plate fringed on 
inner margin. Maxillipeds normal, palp robust. Gnathopods 1 and 2 feeble, 
5th joint elongate, 6" oblong, palm shorter than hind margin. Peraeopods 1—5 
rather slender, finger short. Peraeopods 3—5, 24 joint oval. Uropod 3 
reaching beyond the others. Telson entire, with notch or seulpturing. 


4 species accepted, 2 obscure. 


Synopsis of accepted species: 
Peraeon segment 7 and pleon segments 1 and 2 
1 | dorsaly fridentste un seen a 1: BL nilssoni: >. >3.'729.290 
| Peraeon segment 7 and pleon segments 1 and 2 
dorsally unidentate — 2. 


Telson transversely truncate, a little emarginate 2. H. fulvocinctus . . p.291 
Telson with a little apieal noteh... . . . . - 3. H.huxleyanus . . p.291 
Telson' apieally tridentate 2. nu no 4. H. quadridentatus . p. 292, 


2 


1. H. nilssoni Ohlin 1895 AH.n., Ohlin in: Aeta Univ. Lund., v.81 nr.6 p.44 
t. £.1—6. 


Peraeon segment 7 and pleon segments 1 and 2 each produced dorsally 
into a large central tooth, with a feebler one on either side of it. Pleon , 
segment 3 with an elevated keel, not dentate but strongly rounded behind. 
Side-plates 1—3 (in figure) very much smaller than the 4, Pleon segment 3, 
postero-lateral corners produced to an acute tooth, the lateral. margin above 
forming a truncate lobe with serrate margin, ending in a tooth above. Eyes 
large, oval or slightly reniform, dark with a lighter rim. Antenna 1, 1% joint 
rather longer than 24, 34 about '/, as long as 24, outdrawn in a laminar ealceoli- 
ferous process to middle of 15° joint of flagellum, which joint is as long as 6 or 
7 of the following short joints. Antenna 2 as long as the body, twice as long as 
antenna 1, penultimate joint of peduncle as long as ultimate, outdrawn at apex.. 
Mouth-parts as in H. fulvoeinetus, but 34 joint of mandibular palp even 
more strongly developed. Gnathopods 1 and 2, 6th joint as long as bh, 
but considerably wider, widening towards the oblique palm. Gnathopod 2 
rather weaker than gnathopod 1. Uropod 3, rami without setae. Telson. 


Halirages 291 


not quite twice as long as broad, strongly tapering to an emarginate apex 
 bounded by sharp points. L. 13 to about 18 mm. 


Baffın Bay. Depth 9-27 m. 


2. H. fulvocinetus (Sars) 1858 Amphitho& fwlvocineta, M. Sars in: Forh. Selsk. 
Christian.. p. 141 | 1866 Paramphithoe f., Goes in: Ofv. Ak. Förh., v.22 p.525 
t.39 £.15 | 1871 Halirages fulvocinctus, A. Boeck in: Forh. Selsk. Christian., 1870 
p.196 | 1876 H. f., A. Boeck, Skand. Arkt. Amphip., ».2 p.342 t.23 f.11f. | 1888 H. f., 
T. Stebbing in: Rep. Voy. Challenger, 0.29 p.90 | 1893 H. f., G.O.Sars, Crust. Norway, 
v.1 .p.436 t.154 | 1895 Acanthozone fulvocincta (part.), A. Della Valle in: F. Fl. 
Neapel, 0.20 p.614 t.59 f.27 | 1864 Pherusa tricuspis, Stimpson in: P. Ac. Philad., 
1865 p.139. 


Peraeon segment 7 and pleon segments 1 and 2 each produced to 
a dorsal tooth. Side-plates 1—3 quadrate with rounded corners, 4" broader, 
more rounded, emarginate behind. Pleon segment 3, postero-lateral corners 
and lateral margin as in H.nilssoni. Eyes large, oval, bright red. Antenna 1 
in © more than */, length of body, flagellum more than 4 times as long 
as pedunele, otherwise as in H. nilssoni; antenna 2 longer, ultimate and 
penultimate joints of peduncle subequal, with many calceoli, flagellum nearly 
4 times as long as peduncle, with calceoli in double row. Antennael and 2 inc 
stil more elongate. Mandible, 3% joint of palp longer than 24, eurved, 
elosely fringed. Maxillipeds, outer plates with smooth inner margin, fringed 
with submarginal spine-teeth, 34 joint of palp apically a little produced. 
Gnathopod 1, 5t" joint slightly widening distally, 6!" subequal, rather 
.narrowly oblong, palm much shorter than hind margin, not very oblique, 
but defined by an obtuse angle, armed with short spines, finger short. 
(mathopod 2 similar, rather longer. Peraeopods 1—5 moderately long, 
fringed with fascieles of spinules. Peraeopod 5, 24 joint broadly oval, much 
larger than that of peraeopods 3 and 4, hind margin smooth, roundly produced 
below. Uropod 3, peduncle rather long, rami nearly twice as long as peduncle, 
densely fringed with spinules and on the inner margin also with setae. Telson 
about twice as long as broad, slightly tapering, apex very slightly emarginate 
and serrulate. Colour pellucid, yellowish, transversely banded with orange. 
L. © reaching 19 mm. 

Arectie Ocean (widely distributed, reaching lat. 820 27°N.); North-Atlantie (South 
of Halifax [Nova Scotia], whole West-Norway). Depth 2--470 (659?) m. 


R 3. H. huxleyanus (Bate) 1862 Atylus h., Bate, Cat. Amphip. Brit. Mus., p.155 
t.25 f.4 | 1888 Halirages h., T. Stebbing in: Rep. Voy. Challenger, 0.29 p.902 t.73 
: 1893 Acanthozone huxleyana, A. DellaValle in: F. Fl. Neapel, ».20 p.612 t.59 f.23. 


Back rounded to end of peraeon segment 6, imbricated, peraeon 
segments 5—7 with postero-lateral angles produced acutely backward. 
Peraeon segment 7 and pleon segments 1—3 each produced into a large 
tooth, and at least pleon segments 1—3 carinate, peraeon segment 6. 
slightly toothed. Head, rostrum acute but very small. Side-plates 1—4 
small, of rather irregular shape, 4% not much larger than 34, 5" strongly 
bilobed. Pleon segments 1—3, postero-lateral eorners produced into short 
acute points. Eyes round, not very large, dark in spirit, with a light rim. 
Antenna 1, 1° joint not as long as 24 and 3% combined, 3% more than 
half 24, flagellum 3 or 4 times as long as peduncele, with 62 joints, at intervals 
much widened distally. Antenna 2, peduncle rather longer than in antenna l, 


19* 


292 Halirages 


flagellum about equal; ultimate joint of pedunele rather shorter than pen- 
ultimate, flagellum evenly tapering, with 56 joints, some of the proximal having 
as many as 6 calceoli, and the last 3 joints of peduncle having 2 or 3 
rows of them. Mandible, 3% joint of palp very spinose, scarcely as long 
as 24, Maxillipeds, outer plates with smooth inner margin, fringed with 
submarginal spine-like setae. Gnathopod 1, 5!" joint shorter and narrower 
than 6th, 6th oval, narrowest at hinge of finger, palm very oblique and 
ill-defined. Gnathopod 2 similar, but rather longer, not wider. ' Peraeo- 
pods 1—5 not especially slender, finger short, curved. Peraeopod 5, 24 joint 
somewhat piriform, much larger than in peraeopods 3 and 4. Uropods 1 
and 2 with few marginal spinules, each with a stout apical spine, outer ramus 
shorter than inner; uropod 3, rami subequal, about twice as long as peduncle, 
lanceolate, with several spinules and setae. Telson longer than peduncle 
of uropod 3, more than twice as long as its greatest breadth, sides a little sinuous, 
not strongly tapering, apex triangularly notched. L. 22:5 mm. 


South-Atlantie (Stanley Harbour [Falkland Islands], lat. 52° S, from kelp; 
Hermit Island, lat. 56° S.); Strait of Magellan. 


4. H. quadridentatus O. Sars 1876 H. quadridentatus, G.O. Sars in: Arch. 
Naturv. Kristian., ©.2 p.257 | 1885 H.gq., G.0O.Sars in: Norske Nordhavs-Exp., ®.6 
Crust. I p. 172 t.14 f.4ı, 4a—f | 1893 Acanthozone quadridentata (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p.611 t.59 f.22 | 1882 Halirages elegans, A. M. Norman 
in: P.R. Soc. Edinb., v.11 p. 688. 


Peraeon segments 6 and 7 and pleon segments 1 and 2 each produced 
into a dorsal adpressed tooth. Head, rostrum obsolete, lateral corners narrowly 
rounded, post-antennal produced to an acute deflexed lobe. Side-plates 1—4 
described as simple rounded, and finely serrate along the lower margin 
(but Sars fig. 4d shows side-plate 1 with an acute front angle, in accordance 
with Norman). Pleon segment 1, postero-lateral angles rounded, in segments 2 
and 3 quadrate, in segment 3 lateral margin above the angle slightly arcuate, 
very finely crenulated. Eyes very large, irregular oval, almost meeting 
above, brilliant red. Antenna 1 as long as body, 34 joint of pedunele very 
short, fiagellum 5 times as long as peduncle, joints numerous, short, except 1°. 
Antenna 2 considerably longer, ultimate and penultimate joints of peduncle 
subequal. Mandible, 34 joint of palp rather shorter than 24. Gmathopods 1 
and 2, 5! joint slender, considerably longer than 6th, 6tk oblong, little 
widened distally, palm short, scarcely oblique. Peraeopods 1—5 very slender, 
1° and 24 almost filiform, 3I—5tk with 24 joint piriform, produced at lower 
hind corner to a sharp point. Uropods 1 and 2, outer ramus much shorter 
than inner; uropod 3, outer ramus little shorter than inner, both long, 
lanceolate, with pectinate edges. Telson reaching beyond peduncle of uropod 3, 
twice as long as broad, triangular, apex tridentate, central tooth the largest, 
but all 3 small. Colour whitish, translueent, with a few faint red bands. 
L. 25 mm. 

North-Atlantie (West-Norway, depths 659 and. 960 m; lat. 60° N., long. 6° W., 
depth 988 m). 


H. batei (R. O. Cunningh.) 1871 Atylus? b., R. O. Cunningham in: Tr. Linn. 
Soe. London, v.27 p.498 1.59 f.9 | 1888 Halirages huxleyanus?, T. Stebbing in: Be: 
Voy. Challenger, v.29 p. 902. 


L. 16 mm, 
Strait of Magellan (Possession Bay). 


In. - 
RE 


Halirages, Leptamphopus 293 


H. megalops (Buchh.) 1874 Paramphithoö m., Buchholz in: Zweite D. Nord- 
polarf., 0.2 p.369 Crust. t. 12 | 1893 Acanthozone fulvocineta (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 614. 


Strongly separated from the genus Halirages by the non-dentated segments. 
the long rostrum, short 34 joint of mandibular palp and small size; but in other 
respeets close to H. fulvocinetus (p. 291). Also like, but not reconeilable with Apherusa 
megalops (p. 306). L. 5—7 mm. 


Arctic Ocean (Sabine Island, Germania Harbour, Shannon). Depth 19 m. 


6. Gen. Leptamphopus 0. Sars 


1880 Panoploea (part.), G. M. Thomson in: Ann. nat. Hist.. ser.5 e.6 p.2 | 1893 
Leptamphopus (Sp. un.: L. longimanus). G. O. Sars, Crust. Norway. ®.1 p.458. 

Body not acutely dentate. Head, rostrum not very pronounced. Side-plates 
of moderate size, 4!" the largest, distinetly emarginate. Antennae 1 and 2 
elongate, antenna 1 the longer, no accessory flagellum. Upper lip rounded. 
Lower lip without inner lobes. Mandible, eutting edge much produced, molar 
large, palp moderate. Maxilla 1, inner plate fringed with many setae, 
outer with spines very closely set, palp rather elongate. Maxilla 2, inner 
plate fringed on inner margin, both plates with the apex densely fringed. 
Maxillipeds not very large, outer plates not reaching end of palp’s 24 joint. 
fringed with spine-teeth on inner margin, palp comparatively small. Gnatho- 
pods 1 and 2 slender, unequal, the 24 much the longer, 6" joint nearly 
linear, palm very short and nearly transverse. Peraeopods 3—5, 24 joint 
oval. Uropod 3, rami narrow, unequal. Telson entire. 


2 species. 


‚Synopsis of species: 


None of the segments dorsally produced... . . . l. L. longimanus : . . . p.29% 
Peraeon segment 7 and pleon segments I and 2 
Romsally Prag a er ae. 2. L. novaezealandiae . . p. 294 


1. L. longimanus (Boeck) 1871 Amphithopsis longimana, A. Boeck in: Forh. 

Selsk. Christian.,. 1870 p.200 | 1876 A.1., A. Boeck, Skand. Arkt. Amphip., v.2 p.353 
t.22 f.2 | 1893 Leptamphopus longimanus, G. O. Sars, Crust. Norway, v.1 p.459 t. 162 
1893 Acanthozone longimana (part.), A. DellaValle in: F. Fl. Neapel, v.20 p.604 t.59 f. 16. 
Body slender, back evenly rounded. Head, rostral projeetion very small, 
lateral corners defined below by a small notch, post-antennal corners forming 
a triangular lobe. Pleon segments 2 and 3, postero-lateral corners sub- 
quadrate. Eyes faintly traceable in spirit. Antenna 1 in © nearly as long 
e body, 1° joint subequal to 24 and 34 combined, flagellum slender, about 
5 times as long as peduncle. Antenna 2 much shorter, ultimate joint of 
ednicle longer than penultimate, flagellum not quite twice as long as peduncle. 
Mandible, said to have no accessory plate on right mandible. Gnathopod 1, 
5th joint somewhat widened distally, forming a short setose lobe, 6!" as 
long as 5t%, but much narrower. sublinear, fringed behind with faseicles of 
setules, finger exceedingly small. Gmathopod 2 much longer, 34 joint not 
twice as long as broad, 5!" and 6tk joints subequal, very long and narrow, 
fringed behind with ‘setules, finger very small. Peraeopods 1—5 slender 
and brittle. Peraeopods 3—5, 24 joint oblong oval, hind margin perfectly 
smooth, that of a 5 much the largest. Uropod 1 much larger 
than uropod 2; uropod 3 reaching about te apex of uropod 2, outer ramus 


294 Leptamphopus, Paraleptamphopus 


about half as long as inner. Telson oval quadrangular, with small notch 
in broadly truncate apex. L. © 10 mm. 


Arctic Ocean, North- Atlantie and North-Sea (Greenland; Norway, depth 
282—752 m). 


2. L. novaezealandiae (G. M. Thoms.) 1879 Pherusa n.-z., G. M. Thomson 
in: Tr. N. Zealand Inst., «11 p.289 t.10c f.2, 22—c | 1886 P. neo-zelanica, (G. M. 
Thomson &) Chilton in: Tr. N. Zealand Inst., ».18 p.148 | 1880 Panoploea debilis, 
6. M. Thomson in: Ann. nat. Hist., ser.5 v.6 p.3 t.1 f.3 | 1898 Acanthozone longimana 
(part.), A. Della Valle in: F. Fl. Neapel, «.20 p. 604, 620. 


Back rounded, peraeon segment 7 and pleon segments 1 and 2 produced 
each dorsally into a flat obtuse tooth. Head with triangular front, no proper 
rostrum. Pleon segments 2 and 3, postero-lateral angles produced to a small 
tooth, smaller on 3% than 24, margin above smooth. Antenna 2 nearly as 
long as antenna 1. Right mandible perhaps with small accessory plate. 
Gnathopod 2, 34 joint at least 3 times as long as broad., Peraeopods 3-5, 
24 joint with hind margin slightly serrate. First 3 marsupial plates very 
long and broad, 4 narrow. Apparently in uropods 1 and 2 the outer 
ramus is much the shorter, but in uropod 3 not very much shorter than the 
inner. Telson slightly tapering to a broadly rounded unnotched extremity. 
In other respects, the species shows elose agreement with L. longimanus. 
Colour light brown, made up of stellate markings. L. 9 mm. 


Dunedin Harbour [New Zealand]. 


7. Gen. Paraleptamphopus Stebh. 
1899 Paraleptamphopus, T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p. 209. 


Body not dentate. Antenna 1 the longer, with small accessory flagellum. 
Upper lip flatly rounded. Lower lip without inner lobes. Mandible normal, 
39 joint of palp shorter than 24. Maxilla 1, inner plate with many setae, 
outer with 10 or 11 spines, 24 joint of palp with longer spines on one maxilla 
than on the other. Maxilla 2, inner plate fringed on inner margin. Maxilli- 
peds, outer plates not reaching apex of palp’s 24 joint, fringed with spine- 
teeth on inner margin. Gmathopods 1 and 2 subchelate, weak, 54 joint in 
gnathopod 2 rather long. Peraeopods 1—5, 6!" joint longer than 5%, finger 
short. Peraeopods 3—5, 24 joint oval. Uropods 1 and 2, outer ramus the 
shorter; uropod 3, rami equal. Telson entire. 


2 species. 


Synopsis of species: 


Eyes wanting, colour of body white, semipellueid . .. . 1. P. subterraneus . p.294 
Eyes small, colour of body dark indieo blue . . . . . 2. P. caeruleus. . . p.295 


1. P. subterraneus (Chilton) 1882 Calliope subterranea, Chilton in: N. Zealand 
J. Sei.. e.1 p.44 | 1882 C. s., Chilton in: Tr. N. Zealand Inst., «.14 p.177 t.9 f.1—10 | 
1889 C. s., Moniez in: Rev. biol. Nord France, ».1 p.253 ! 1890 C. s., Wrzesniowski 
in: Z. wiss. Zool., 2.50 p.611 | 1886 Calliopius subterraneus, (G. M. Thomson &) Chilton 
in: Tr. N. Zealand Inst., 0.18 p.148 | 1894 €. s.2, Chilton in: Tr. Linn. Soc. London, 
ser.2 0.6 p9.234 1.28 f.10—18; #3 t.22 f.1—15, t.23 f. 1—9) | 1898 Acanthonotosoma 
subterraneum (part.), A. Della Valle in: F. Fl. Neapel, ©.20 p. 678 | 1899 Calliope sub- 
terranea, Paraleptamphopus (part.), T. Stebbing in: Ann. nat. Hist., ser.7 ©.4 p.210. 


Paraleptamphopus, Calliopius 295 


©. Body slender. Head, rostral projection very small. Side-plates not very 

deep. Pleon segment 3, postero-lateral corners rounded. Eyes wanting. Antennal, 
1°* joint rather longer than 24, 34 short, flagellum many-jointed, accessory 
flagellum 1-jointed. Antenna 2, ultimate joint of peduncle slightly shorter than 
penultimate, flagellum much shorter than that of antenna 1. Maxilla 1, inner 
plate with 10 setae. Maxilla 2, inner plate strongly fringed on the inner 
margin. Maxillipeds, outer plates nearly reaching end of palp’s 24 joint, 
32 joint of palp a little produced over the short finger. Gnathopod 1, 
5th joint distally widened, rather shorter than 6, which is oblong oval, 
palm sliehtly oblique "and serrulate, fairly well defined, finger with setules 
on the concave margin. Gnathopod 2 much longer and thinner, 5t% joint 
considerably longer than 6", both nearly parallel-sided, palm transverse, 
very short, well defined, finger very short. Uropod 1, peduncle longer than 
rami, outer ramus not much shorter than inner; uropod 2, outer ramus 
eonsiderably shorter than inner; uropod 3, rami not very much longer than 
pedunele. Telson short, not tapering, broader than long, sides convex, apical 
border faintly coneave. Colour white, semipellueid. L. 5 mm. — The 
supposed © is uncertain in respeet to sex and to identity with the species. 
It has the flagellum calceoliferous in both 1° and 29 antennae, and on some 
of the limbs a plate additional to the normal branchia. 


New Zealand (Eyreton, Lincoln, Ashburton and Winchester). In wells. 


2. P. caeruleus (G. M. Thoms.) 1885 Pherusa caerulea, G. M.'Ihomson in: 
N. Zealand J. Sei., v.2 p.576 | 1887 P. e., T. Stebbing in: Tr. zool. Soe. London, v.12vı 
p.206 1.39 f.» | 1886 Amphithopsis c., T. Stebbing in: P. zool. Soe. London, p.5 | 1899 
Pherusa c., Paraleptamphopus (part.), T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p.210 | 
1893 Acanthonotosoma subterraneum?, A. Della Valle in: F. Fl. Neapel, v.20 p. 678. 


Body rather compact, shining. Head, rostrum short, lateral corners 
narrowly obtuse. Side-plates 1—4 rather deep, 1% —34 oblong, 4? much the 
largest, rounded below, emarginate behind. Pleon segment 3, postero-lateral 
corners rounded. Eyes very small, dark. Antenna 1, 1° joint much thicker 
than 24 and rather longer, 22 much longer than 34, flagellum about thrice as long 
as pedunele, 33-jointed, accessory fagellum 1-jointed. Antenna 2 much shorter, 
ultimate joint of peduncle rather shorter than penultimate, flagellum 19-jointed. 
Maxilla 1, inner plate with 15 setae, outer with 10 spines. Maxilla 2, fully 
fringed on inner margin of inner plate. Maxillipeds, outer plates nearly 
reaching end of palp’s 24 joint. Gnathopods 1 and 2 feeble and slender, 
5th joint distally a little widened, longer than 6%, which is also a little 
widened distally. palm oblique, short, in gnathopod 2 defined by a promi- 
nence, against which the setulose end of the blunt finger impinges. Uropod 1, 
peduncle longer than rami, outer ramus not much shorter than inner. Uropod 3, 
rami not very long, but longer than peduncle. Telson rounded, shorter than 
the short peduncle of uropod 3. Colour deep indigo-blue, appearing black 
when alive, persistent in spirit, but flagellum of antennae 1 and 2, and 
appendages of peraeon and pleon light. L. 5 mm. 


New Zealand (Otago). In streamlet, at height of about 915 m above sea-level. 


8. Gen. Calliopius Lillj. 


1856 Calliope (Sp. un.: ©. leachii) (non J. Gould 1836, Aves!), Bate in: Rep. 
Brit. Ass., Meet.25 p.58 | 1857 C., Bate in: Ann. nat. Hist., ser.2 «.19 p.142 | 1859 
Paramphithoe (part.), R. M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 nr.1 p.68 | 
1861 Amphithopsis (part.), A. Boeck in: Forh. Skand. Naturf,, Mode 8 p.661 | 1865 


296 i Calliopius 


Calliopius, W. Lilljeborg in: N. Acta Soc. Upsal., ser.3 ©.6 nr.1 p.18,19 | 1876 @., 
A. Boeck, Skand. Arkt. Amphip., v.2 p.344 | 1893 C©., G. O. Sars, Crust. Norway, 1 
p. 446 | 1866 Paramphithoe, Goes in: Ofv. Ak. Förh., v.22 p. 523. 


. Body rather strongly built, without dorsal teeth. Side-plates of moderate 
size. Antennae 1 and 2 not very slender, subequal, 39 joint of pedunele 
of antenna 1 apically produced, no accessory flagellum, joints in flagella 
sharply defined, calceoli in both sexes. Mouth-parts nearly as in Apherusa (p.304), 
but palp of mandible larger, with 3% joint as long as 24. Gmathopods 1 
and 2, 5" joint short, cup-shaped, 6 large, oval, palm longer than hind 
margin, weakly defined. Peraeopods 1—5 rather strongly built, finger curved, 
not elongate, 3I—5t" pairs with 24 joint oval. Uropod 3 scarcely reaching 
beyond the others, peduncle short, rami lanceolate, subequal. Telson entire, 
linguiform. 


2 species accepted, 1 obscure. 


Synopsis of accepted species: 


Antenna 1, 3d joint produced into a large lobe. . . . 1, ©. laeviusculus . p.24# 
Antenna 1, 34 joint produced into a small lobe. . . . 2. C.rathkii . . . . p.2%6 


1. C. laeviusculus (Kröyer) 1838 Amphithoe laeviuscula, Kröyer in: Danske 
Selsk. Afh., ©.7 p.281 t.3 f.13a—h | 1859 Paramphithoel., R.M. Bruzelius in: Svenska 
Ak. Handl., n. ser. ©.3 nr.1 p.76 | 1861 Amphithopsis l., A. Boeck in: Forh. Skand. 
Naturf., Mede8 p.662 | 1862 Calliopel., Bate, Cat. Amphip. Brit. Mus.. p.148 t.28 f.2| 
1871 Calliopius laewiuseulus, A. Boeck in: Forh. Selsk. Christian., 1870 p. 197 | 1876 ©. 1. 
(part.), A. Boeck, Skand. Arkt. Amphip., v.2 p.345 | 1893 Acanthozone laeviuscula (part.), 
A. Della Valle in: F. Fl. Neapel. ©.20 p. 602 t.59 f.12 | 1856 Calliope leachii, Bate in: 
Rep. Brit. Ass., Meet.25 p.58 t.17 f.3 | 1857 C©.I., Bate in: Ann. nat. Hist., ser.2 r.19 
p. 142 | 1858 Amphithoe serraticornis, M. Sars in: Forh. Selsk. Christian... p. 140. 


Pleon segments 1—3 dorsally raised at end, giving an imbrieated. 
appearance. Head, rostrum obsolete, lateral corners obtusely rounded. Pleon 
segment 3, postero-lateral corners subquadrate. Eyes oval, reniform, . very 
dark, larger in © than in 9. Antenna 1 of '/, length of body, 1°% joint. as 
long as 24 and 34 combined, 34 produced beyond 1° joint of flagellum, 
with row of 8 calceoli on the triangular lobe, flagellum rather longer than 
pedunele, with 20—30 joints sharply defined, as though the flagellum were 
serrate. Antenna 2 scarcely longer, flagellum similar in appearance, sub- 
equal to peduncle. Gnathopods 1 and 2 strongly built, 5" joint with setose 
lobe, 6 wide at base, narrowing from commencement of oblique palm to 
hinge of finger. Peraeopods 1-—-5 strong, 24 joint of 5'" pair rather.large, 
especially in the S.  Uropod 3, both rami plumose and spinose. Telson 
nearly twice as long as broad, a little dilated at base, smoothly rounded 
at apex. Colour uniformly light green, with whitish area on front of back. 
L. 9 12,  13—14 mm. 


Aretic Ocean, North-Atlantie, North-Sea and Skagerrak (Greenland; Spitzbergen; 
Labrador; Norway, depth 6—56 m; British Isles); North-Pacifie. 


2. C. rathkii (Zadd.) 1844 Amphithoe r., Zaddach, Syn. Crust. Pruss.. p.# | 
1895 Calliopius rathkei, G. ©. Sars, Crust. Norway, v.1 p.447 1.157 f.2 | ?1847 Amphi- 
thoe gibba, (H. Frey &) R. Leuckart, Wirbell. Th., p.162 | 1862 Calliope grandoculis, 
Bate, Cat. Amphip. Brit. Mus., p. 149 t.28 f.4 | 1879 Calliopius laeviusculus (err., non’ 
Amphithoe laeviuscula Kröyer 1838!), Hoek in: Tijdschr. Nederl. dierk. Ver., #.4 p.138 
t.6 f.4, 6, 7, 10—12: t. 10 £.7. 


Calliopius, Paracalliope 297 


Glosely approaching C. laeviuseulus. Segments rather sharply defined. 
Head, rostrum short but distinet, lateral eorners subtruneate. Pleon segment 3, 
postero-lateral eorners produced to a small but distinet upturned point, margin 
above convex. Eyes obliquely oval, dark brown, larger in 9 than no. Antennal, 
18 joint not as long as 24 and 34 combined, 34 about '/, aslong as 24, produced 
lobe quite short, with only 2 or 3 ealceoli. Gmathopods 1 and 2, lobe of 
5th joint narrow, sparingly setose, 6'% less stout than in preceding species. 
Peraeopods 1—5 not so stoutly built as in C. laeviuseulus. Uropod 3, both 
rami spinose, only the inner plumose. Telson fully twice as long as broad, 
of uniform width, smoothly rounded at apex. Colour yellowish violet, with 
irregular orange specks, segments banded behind with reddish brown, on 
dorsum of peraeon segments 3 and 4 a shield of silvery lustre. L. oO searcely 
over 6 m. 


Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (Norway, Bohuslän, France, 
Holland, Great Britain); Kattegat. 


C. pietus (Giles) 1890 Parapleustes p., G. M. Giles in: J. Asiat. Soc. Bengal, 
v.59 p.70 1.2 £.6 | 1893 Acanthozone laeviuscula?, A. Della Valle in: F. Fl. Neapel, 
v.20 pP. 895. 

Very like C. laeviusculus. Pleon segment 3, postero-lateral angles rounded. 
Eyes very large. Colour resembling that of the host. L. reaching 7 mm. 


Bay of Bengal (Andaman Isles). Depth 55 m. On Pennatula sp. 


9. Gen. Paracalliope Stebb. 5 


1899 Paracalliope (Sp. typ.: Calliope fluviatilis), T. Stebbing in: Ann. nat. Hist., 
ser.7 v.4 p.210. 


Body without dorsal teeth. Side-plates not very large. Antenna 1 
the shorter, without accessory flagellum or calceoli. Upper lip rounded. 
Lower lip with inner lobes. Mandible slightly constructed, normal, 39 joint 
of palp at least as long as 24. Maxilla 1, inner plate with many (11) 
setae, outer with (apparently) 11 spines, 24 joint of palp carrying spine- 
teeth and slender spines. Maxilla 2, inner plate the narrower, fringed along 
inner margin. Maxillipeds, inner plates rather broad, outer reaching apex 
of palp’s 24 joint, fringed with spines on inner margin, the series not 
eontinued on the apical border, finger of palp acute. Gnathopod 1,'5*" joint 
rather shorter than oval 6%. Gnathopod 2, 5" joint cup-shaped, 6? quadrangular 
oval, with hollow well-defined palm. Peraeopods 1—4, finger eurved. Peraeo- 
pod 5 much longer than the others, finger long, straight, spinose. Uropods 1—3, 
rami slender, with few spines. Uropod 3, rami equal, not longer than peduncle. 
- Telson short, entire. 


PT 


1 species. 


1. P. fluviatilis (G. M. Thoms.) 1879 Calliope f., &. M. Thomson in: Tr. N. 
“ Zealand Inst.. «.1l p.240 t.10c f.4, 4a—c | 1886 Calliopius f., (G. M. Thomson &) 
Chilton in: Tr. N. Zealand Inst., v.18 p.148 1899 Calliope f., ?Oedicerus novae-zealandiae, 
Paracalliope sp. typ., T. Stebbing in: Ann. nat. Hist.. ser.7 v.4 p.210 | 1880 Pherusa 
australis. Haswell in: P. Linn. Soe. N.S.Wales, v.5 p.103 t.7 £.1. 


Peraeon segments 1—6 rather short. Head, front obtuse-angled. Side- 
plate 1 a little widened distally. Pleon segment 3, postero-lateral corners 
'subquadrate. Eyes oblong oval, large, black. Antenna 1, 1% joint as long 
as 24 and 34 combined, but much stouter, 39 nearly '/, as long as 24, and 


298 Paracalliope, Harpinioides 


(contrary to Haswell and Thomson) quite distingwishable from the flagellum, 
whieh is slender, about twice as long as pedunele, 21-jointed. Antenna 2 
longer, ultimate and penultimate joints of pedunele subequal, flagellum about 
twice as long as peduncle, 24-jointed. Upper lip transversely oblong, 
with distal margin not strongly eonvex. Mandible, cutting edge and 
accessory plate slight in structure, spine-row with few spines, molar very 
prominent, 39 joint of palp curved, spinose, narrow at apex. Gnathopod 1, 
5th joint elongate triangular but not very long, 6! with oblique palm. 
Gnathopod 2 considerably stronger, lobe of 5!" joint fringed with slender 
spines, 6!" broad at base, widening a little to the moderately oblique 
palm, which on one margin is evenly concave, on the other sinuous and 
spinose, the rather strong finger closing down in the hollow between 
them; the reversion of gnathopod 2, beginning at 5" joint, recalls the 
eurious torsion in gnathopod 1 of Trischizostoma nicaeense (p. 13). Peraeo- 
pods 15, 6!" joint longer than either 4 or 5%, the 4ı—6th joints 
spinose, 24 joint in peraeopods 3—5 expanded, hind margin little serrate. 
Peraeopod 5, 6 joint elongate, but shorter than the long, stiliform, 
spinose finger. Uropod 1, rami shorter than peduncle, outer ramus little 
shorter than inner. Uropod 2, outer ramus much shorter than inner. Uropod 3, 
peduncle rather elongate. Telson little longer than broad, of uniform width 
to the smoothly rounded apex. Colour greyish, more or less marked with 
dark spots. L. 5 mm. 

This species is not improbably identical with Oedicerus novi-zealandiae Dana 
(p.270), which Boeck, in 1861, includes into his genus Aceros (p. 248). 

New Zealand. In fresh water, in brackish or nearly salt water. — Botany 
Bay |East-Australia]. 


10. Gen. Harpinioides Stebb. 


1888 Harpinioides (Sp. un.: H.drepanocheir), T. Stebbing in: Rep. Voy.Challenger, 
r.29 p.986 | 1890 Harpinoides, Warburton in: Zool. Ree., 0.25 Crust. p. 19. 

Back rounded. Head, rostrum obsolete. Side-plates 1—4 rather deep, 
1° somewhat expanded distally. Antenna 1 the longer, pedunele short, 
accessory flagellum minute. Upper lip, distal margin broad, flat. Lower 
lip with inner lobes. Mandible, cutting edge very oblique, long, eut into 
numerous dentieles, accessory plate on left similar but shorter, on right 
represented by a short prickly spine, 10 spines in spine-row, molar 
small and slender, not dentieulate, 24 joint of palp dilated, 34 equally 
long, but narrower. Maxilla 1, inner plate with 1 seta, outer. with 
9 spines, mostly smooth, 24 joint of palp somewhat dilated. Maxilla 2, 
inner plate shorter and narrower than outer, partially fringed on inner 
margin. Maxillipeds, inner and outer plates narrow, outer prolonged much 
beyond inner, but not reaching end of palp’s 24 joint, fringed on inner 
margin with slender spine-teeth, palp rather long. finger as long as 
3% joint. Gnathopods 1 and 2 similar, 5th joint short, 6% long, tapering. 
Peraeopods 3—5, 24 joint greatly expanded. Uropods 1 and 2, outer 
ramus the shorter; uropod 3, rami subequal, lanceolate. Telson almost 
entire, feebly notched. 


l species. 


I. H. drepanocheir Stebb. 1888 H. d.. T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.987 t.82 | 1893 Acanthonotosoma d., A. Della Valle in: F. Fl. Neapel, v. 20 
p. 677 1.59 8.87. 


Harpinioides, Atylopsis 299 


Pleon segment 3, postero-lateral corners strongly rounded. Eyes not 
observed. Antenna 1, 1° joint stout, longer than 24 and 34 combined, 
flagellum twice as long as pedunele, with 24 joints, 1° the longest; accessory 
fiagellum shorter than 1° joint of primary, eonsisting of 1 narrow, truncate 
joint. Antenna 2, ultimate joint of pedunele rather shorter than pen- 
ultimate, flagellum shorter than pedunele, 14-jointed. Gnathopods 1 and 2, 
5’ joint cup-like, about '/, length of 6!, 6th broadest at base, tapering 
with a curve to a narrow apex, without definite palm, finger long, slender, 
slightly eurved, about half length of 6!" joint and closing over the 
coneave part of its margin. Gmnathopod 2 rather the longer. Peraeo- 
pods 1—5, 5t" joint shorter than 4% or 6b, finger curved. Peraeopod 3, 
2° joint almost as broad as long, and of nearly equal breadth throughout. 
Peraeopod 5 longer than peraeopod 4, and with 24 joint broader. Telson 
longer than peduncle of uropod 3, once and a half as long as broad, slightly 
tapering to a slight triangular emargination between minutely notched 
apiees. L. 6 mm. 


Cumberland Bay |Kerguelen Island]. Depth 232 m. 


11. Gen. Atylopsis Stebb. 
1888 Atylopsis (part.), T. Stebbing in: Rep. Voy. Challenger, v.29 p. 924. 


Side-plates rather shallow. Antenna 1, peduncle short. Upper lip 
slightly bilobed. Lower lip with inner lobes. Mandible normal, palp 
strong, 34 joint as long as 24. Maxilla 1, inner plate with few setae, 
outer with 11 'spines. Maxilla 2, inner plate with few setae on inner margin. 
Maxillipeds, outer plates without spine-teeth on inner margin, 39 joint of 
palp produced over base of finger. Gnathopods 1 and 2 not very powerful, 
subchelate, 24 larger than 1%. Uropods 1—3, outer ramus shorter than 
inner. Telson short, with emarginate apex. 


2 species. 


Synopsis of species: 


Pleon segments 1 and 2 dentate; uropod 3, rami extremely 


EB re RER eg ...... 1. A.dentata . . . p.299 
Pleon segments 1 and, 2 not dentate; uropod 3, rami not 
extremely unequal . ........ N NEE 2. A. emarginata . p.300 


1. A. dentata Stebb. 1888 A. dentatus, T. Stebbing in: Rep. Voy. Challenger, 
r.29 p. 929 t.80 | 1893 Acanthonotoseoma?, Acanthozone?, A. Della Valle in: F. Fl. 
Neapel, 0.20 p.910. - 


Like, but quite distinet from Apherusa tridentata (p. 305). Peraeon seg- 
ment 7 and pleon segments 1 and 2 each produced to a dorsal tooth, surface of body 
rather hairy. Head, rostrum small, obtuse, lateral margin forming a rounded 
lobe, post-antennal cormers not produced. Side-plate 1, lower front corner 
rounded, slightly outdrawn. Pleon segment 3, postero-lateral corners produced 
into a small tooth. Eyes broadly oval. Antenna 1, 1° joint not twice as 
long as 24, 24 scarcely longer than broad, remainder missing. Antenna 2, 
penultimate joint of peduncle not elongate, after-part missing. Maxilla 1, 
inner plate with 2 setae; on outer plate only 10 spines were actually ob- 
served. Maxilla 2, inner plate rather shorter and narrower than outer, with 


RER TE SR 


300 Atylopsis, Cleippides 


2 setae on the inner margin. Maxillipeds, outer plates small, feebly armed, 
finger of palp short, with spine-like nail. Gmathopod 1, 5 and 6 joints 
equal, 6!" very little widened distally, palm short, oblique, much shorter 
than hind margin, with defining spine at the eurve in which they meet. 
Gnathopod 2 longer, 5! joint rather shorter than 6%, which is a little 
more widened towards the more oblique palm than in gnathopod 1. 
Peraeopod 1, 6% joint longer than 4% or 5th, finger rather strong. with 
2 or 3 setules on convex margin. Peraeopods 3—5, 24 joint broadiy 
oval, serrate on hind margin, largest in peraeopod 5. Uropods 1—3, 
outer ramus much shorter than inner; uropod 3, peduncle very short, 
outer ramus narrower than inner and about half its length, both acute 
and carrying spines, Telson as long as peduncle of uropod 3, a little 
longer than broad, ending in a small triangular emargination between obtuse 
apices, sides convex. L. 6 mm. 


Strait of Magellan (Cape Virgins). Depth 100 m. 


2. A. emarginata Stebb. 1888 4A. emarginatus, T. Stebbing in: Rep. Voy. 
Challenger, ©.29 p.932 t.81 | 1893 Acanthonotosoma emarginatum, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 678 t.59 f. 86. 


Body not dentate. Head, rostrum small, obtuse, post-antennal corners 
slightly produced, rounded. Side-plate 1, lower front corner slightly outdrawn. 
Pleon segment 3, postero-lateral corners rounded. Eyes seemingly large, 
reniform. Antenna 1, 1° joint little longer than 24, 24 than 34, flagellum not 
long, but nearly twice as long as peduncle, 30-jointed, accessory flagellum 
minute, 1-jointed. Antenna 2 longer, ultimate joint of pedunele rather 
longer than penultimate, flagellum with 33 joints, 1° longest. Maxilla 1, inner 
plate with 4 or 5 setae, outer with 11 spines. Maxilla 2, inner plate as 
broad as outer, with 4 setae on inner margin. Maxillipeds, outer plates 
moderately large, with long spines on distal margin and slender submarginal 
spines near the inner border, finger rather large, acute. Gnathopods 1 and 2, 
5th joint much shorter than 6%, distally rather wide and cup-like, 6 joint 
oblong oval, palm oblique, with a tooth near the hinge, then sinuous and 
closely peetinate, in gnathopod 1 as long as the hind margin, but shorter than 
it in gnathopod 2; finger with inner margin cut into many adpressed teeth. 
Peraeopod 1, 6% joint longer than 4" or 5t", finger eurved, strong, unarmed. 
Peraeopods 3—5, 24 joint rather wider above than below, not strongly 
expanded, hind margin straight. Uropod 1, rami long; uropod 2, outer 
ramus much shorter than inner; uropod 3, peduncle short, rami long. outer 
ramus in © not greatly shorter than inner, but more decidedly so in © 
Telson longer than pedunele of uropod 3, a little longer than broad, distal 
emargination not as deep as wide, the triangular apices a little serrate on 
outer margin. L. 7 mm. 


Southern Indian Ocean (Marion Island). Depth 567 m. 


12. Gen. Cleippides Boeck 


1871 Cleippides (Sp. un.: CO. trieuspis), A. Boeck in: Forh. Selsk. Christian., 1870 
p- 201 | 1876 C., A. Boeck, Skand. Arkt. Amphip., v.2 p. 357 | 1875 Cleippides, Cam. 
Heller in: Denk. Ak. Wien, ».35 p. 32. 


Back rounded in front, some of the hinder segments produced to a 
dorsal tooth. Side-plates 1—4 not large. Antenna 1 the longer, without 


\ 


Gleippides 301 


accessory flagellem. Upper lip little or not at all emarginate. Lower lip 
with inner lobes obsolescent. Mandible, cutting edge not dentate, accessory 
plate dentieulate, spine-row small, or accessory plate and spine-row wanting 
(Heller), molar with a eircular ridge, 2% and 34 joints of palp distally 
widened. Maxilla 1, inner ‚plate with several setae, outer with 11. spines, 
st joint of palp about half as long as 24. Maxilla 2, inner plate rather 
the shorter, fringed on inner margin. Maxillipeds, inner plates of moderate 
size, outer not nearly reaching end of palp’s 24 joint (if Kroyer’s figure 
can be trusted against his text), fringed with spine-teeth on inner margin, 
palp stout, 1°°—34 joints subequal in length, 4" small. Gnathopod 1 
weakly subchelate, 5tk joint much longer than 6", Peraeopods 1—5 slender, 
32 — 5th with 24 joint little eg Uropod 3, rami lanceolate, equal. 
Telson small, entire. 


2 species. 


Synopsis of species: 


Three segments, each produced into a dorsal tooth . . 1. C. trieuspis . . . p.301 
Four segments, each produced into a dorsal tooth. . . 2. C. quadricuspis . p.301 


1. C. trieuspis (Kroyer) 1846 Acanthonotus t., Kreyer in: Naturh. Tidsskr., 
ser.2 v.2 p.115 | 1846 A.t., Kroyer in: Voy. Nord, Crust. t.18 f.1a—v | 1862 Dexaminet., 
Bate, Cat. Amphip. Brit. Mus, p.133 t,24 f.5 | 1866 Paramphitho£ t., Goes in: Ör. 
Ak. Förh., v.22 p.525 | 1871 Cleippides t., A. Boeck in: Forh. Selsk. Christian., 1870 
2.201 | 1876 C.t., A. Boeck, Skand. Arkt. Amphip., v.2 .p.358 | 1893 Acanthozone t. 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 608 t.59 £.13, 14. 


Without carina. Peraeon segment 7 and pleon segments 1 and 9 
sach produced into a large flat dorsal tooth. Head, rostral projeetion 
small. Side-plates 1—3 deeper than broad, lower corners rounded. Side- 
plate 4 rather broader, slightly emarginate behind. Pleon segment 3, 
postero -lateral angles outdrawn into a tooth, above which is another, 
separated by a rather large sinus. Eyes narrowly reniform, dark, the 
colour disappearing in spirit. Antenna 1 long, thin, 1° joint as long as 
22 and 34 combined, flagellum thrice as long as pedunele, 50—60-jointed. 
Antenna 2 much shorter, ultimate joint of peduncle rather shorter than 
penultimate,  flagellum rather longer than peduncle, 40-jointed. Gnatho- 
pod 1,:5th joint much longer than the narrowly oval 6t%, palm undefined, 
finger small, but strong, curved, bidentate. Gmathopod 2 rather longer, 
5 joint narrow, scarcely longer than the narrowly quadrangular 6th, 
Peraeopods 3—5, 24 joint larger in peraeopod 4 than in 34, in 5th than 
in 4, narrowing downward, the hind margin serrate, tending to concave. 
Uropod 1, outer ramus little shorter than inner; uropod 2, outer ramus much 
shorter than inner. Telson oval, feebly acuminate. Colour chestnut-brown. 
L. reaching 16 mm or more. 


Arctie Ocean and North-Atlantie (South-Greenland, Spitzbergen). 


2. C. quadricuspis Heller 1875 C. q., Cam. Heller in: Denk. Ak. Wien, 
+85 p.82 t.3 f.1—16 | 1885 ©. q., G.O. Sars in: Norske Nordhavs-Exp., v.6 CrustI 
».174 t.14 f.5 | 1893 Acanthozone trieuspis (part.), A. Della Valle in: F. Fl. Neapel, 
».20 p. 608. 


Peraeon segment 7 and nleon segments 1—3 bluntly carinate and 
each produced into a long dorsal tooth. Head, rostrum small, acute, lateral 


302 Cleippides, Stenopleura 


corners angular, scarcely produced, post-antennal cormers acutely produced 
downward. Side-plates 1—4 subquadrate, produced -below into a minute- 
pointed tooth, in front of 1%, behind in 2I—4%; 5th and 6 each produced 
into 2 teeth, 5'% pair much wider than the rest. Pleon segment 3, postero- 
lateral corners with 2 teeth as in C. tricuspis. Eyes small, reniform, almost 
colourless. Antenna 1, 1% joint as long as 24 and 39 combined, flagellum more 
than thrice as long as pedunele, many-jointed. Antenna 2 scarcely half as long. 
Gnathopods 1 and 2 alike, but the 24 rather longer than the 1°; 5t" joint 
long, distally wide, 6% abruptly narrower, oval, about half as long, palm 
undefined, finger curved. Peraeopods 3—5, 2° joint scarcely expanded, 
except a little at the base; peraeopod 5 with a tooth, the lower hind 
angle produced to a point. Uropods 1—3 and telson as in ©. trieuspis. 
Colour yellowish white shading into violet and rose-red; mouth-parts and 
most of the limbs of a rich carmine. I. 42—52 mm. 


Arctic Ocean (lat. 67°—80° N,, long. 16° E.—12° W., depth 663 1890 m; Spitz- 
bergen, depth 160265 m). 


13. Gen. Stenopleura Stebh. 


1888 Stenopleura (Sp. un.: S. atlantica), 'T. Stebbing in: Rep. Voy. Challenger, 
v.29 p. 949. 


Body slender, not dentate. Head, post-antennal corners not produced. 
Side-plates 1—4 very shallow. Antenna 1 the longer, without accessory 
flagellum. Lower lip with inner lobes. Mandible with accessory plate on 
left, spine-row with very few spines, molar strong, palp robust, 34 joimt as 
long as 24. Maxilla 1, inner plate with 1 seta, outer with 10 spines, 
24 joint of palp tipped with spine-teeth. Maxilla 2, inner plate shorter than 
outer, each with a few apical spines, inner margin unarmed. Maxillipeds, 
inner plates with distal margin sloping outward, outer plates not reaching 
beyond apex of palp’s 1° joint, with 3 spines on apical margin and a few 
submarginal setae on inner, finger as long as 39 joint of palp. Gmnathopods | 
and 2 alike, subequal, 5'% joint short, cup-like, 6" oval, rather large, finger 
long. Peraeopods 1 and 2, 24 and 4th joints widened. Peraeopods 3—5, 
24 joint expanded, finger in all peraeopods smoöth, curved. Uropods 1 
and 2, outer ramus much shorter than inner; uropod 3, rami long, lanceo- 
late, outer nearly as long as inner. Telson entire, apically sculptured. 


l species. 


1. S. atlantica Stebb. 1888 8. a., T. Stebbing in: Rep. Voy. Challenger, ». 29 
p-950 t.84 | 1893 Acanthozone a., A. Della Valle in: F. Fl. Neapel, ©.20 p.601 1.59 f. 11. 


Head, rostrum and lateral corners little prominent. Side-plate 1 
distally a little produced forward. . Pleon segment 3, postero-lateral corners 
subquadrate. Eyes large, oblong oval. Antenna 1, peduncle short, 1° joint stout, 
longer than 24 and 3@ combined, flagellum about 5 times as long as peduncele, 
soon becoming filiform, with 33 joints, 15 nearly as long as 24 of peduncle. 
Antenna 2 rather shorter, ultimate joint of peduncle shorter than penultimate, 
flagellum more than 4 times as long as pedunele, filiform, 35-jointed. Gmatho- 
pods 1 and 2, 5th joint triangular, with serrate spines on the slightly produced 
lobe, 6th joint triangular oval, tapering to the hinge of the eurved finger; 
to judge by the length of the latter, the palm may be considered to form 
the hind margin. Gnathopod 2 is slightly the larger, with the lobe of the 


‘ Stenopleura, Haliragoides 303 


5th joint rather narrower and more decidedly produced. Peraeopods 1 and 2, 
24 joint not twice as long as broad, narrowest at the base, 4" shorter than 
either 5th or 6%, broad, with convex outer margin. Peraeopods 3—5, 
22 joint widely oblong oval, but in peraeopod 5 with straightened hind margin 
and produced below the 34 joint. Uropods 1—3, all the rami spinulose, 
in uropod 2 outer ramus only half as long as inner, in uropod 3 peduncle 
very short, outer ramus a little shorter and more slender than inner. 
Telson rather longer than peduncle of uropod 3, a little longer than broad, 
the central piece of the tridentate apex much larger than the lateral teeth. 
L. 75 mm. 
Tropical Atlantie (lat. 2—3° N., long. 8—-24° W., depths 91 and 3383 m); South- 

Atlantic (near Tristan da Cunha). 


14. Gen. Haliragoides 0. Sars 
1893 Haliragoides (Sp. un.: H. inermis), G. O. Sars, Crust. Norway. v.1 p.432. 


Body slender, not dentate. Head, post-antennal corners strongly 
produced. Side-plates 1—4 shallow, 4" not deeper,than 1%°—3@. Antenna 1 
the shorter, without accessory flagellum. Upper lip with rounded, very 
slightly insinuate margin. Lower lip, inner lobes distinet, small. Mandible 
normal, well developed, 3% joint of palp much shorter than 2%. Maxilla 1, 
inner plate with several setae. Maxilla 2, inner plate fringed on inner 
margin. Maxillipeds normal, outer plates fringed with spine-teeth, palp 
rather robust than elongate. Gnathopods 1 and 2 subequal, rather feeble, 
5tb joint elongate, 6% oval, palm very oblique. Peraeopods 1—5 very 
slender, long, finger long and thin. Peraeopod 5, 24 joint much larger 
than in peraeopods 3 and 4. Uropod 3 reaching much beyond the others. 
Telson entire, apically sculptured. 


1 species. 


1. H.inermis (O.Sars) 1882 Halirages i., G. ©. Sars in: Forh. Selsk. Christian., 
nr.18 p.103 t.5 £.5 | 1893 Haliragoides i., G.O.Sars, Crust. Norway, v.1 p.433 t.153 | 
1893 Acanthozone quadridentata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 611. 


Back rounded, not at all carinate. Head, rostrum and lateral corners 
very little produced, post-antennal lobes linguiform, deflexed, serrate in 
front. Side-plate 1 obtusely. produced, 4! a little emarginate. Pleon 
segment 3, postero-lateral corners produced to a small acute tooth, above which 
the margin is convex, smooth. Eyes large, oval, feebly developed, light red. 
Antenna 1, 1° joint rather stout, apically dentate, nearly as long as 24 and 34 
combined, flagellum about thrice as long as peduncle, with 28 joints, 15 elongate. 
Antenna 2 much longer, longer than the body, ultimate and. penultimate 
joints of peduncle subequal, flagellum 5 or 6 times as long as peduncle, 
1° joint long, slender, the others short. Gnathopods 1 and 2, 5" joint 
elongate triangular, being a little widened distally, 6% shorter, widest at 
beginning of palm, which is much longer than the hind margin, defined 
from it by an obtuse angle, finger about as long as palm. Peraeopods 1—5 
very brittle, fringed with fascieles of setules, 4" joint shorter than 5tk, 6th 
much longer than either. Peraeopods 3 and 4, 24 joint rather small, 
narrowly oval. Peraeopod 5, 24 joint much wider above than below. 
Uropod 2 small. Uropod 3 long, pedunele well developed, rami narrowly 
lanceolate, outer a little the shorter, both densely spinulose and with setae 


304 Haliragoides, Apherusa 


on inner margin. Telson shorter than pedunele of uropod 3, oval triangular, 
tridentate, the central tooth much the largest. Colour brilliant with red, 
orange and pure white. I. 10—14 mm. 


Arctie Ocean, North-Atlantie and North-Sea (Norway). Depth 188—564 m. 


15. Gen. Apherusa A. Walker 


1859 Paramphithoe (part.), R.M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 
nr.1 p.68 | 1861 Amphithopsis (part.), A. Boeck in: Forh. Skand. Naturf., Mode 8 
p.661 | 1862 Gossea (Sp. un.: G. microdeutopa) (non L. Agassiz 1862, Coelenterata!), Bate 
(&Westwood), Brit. sess. Crust., v.1 p.276|1871 Halirages (part.), A. Boeck in: Forh. Selsk. 
‘ Christian., 1870 p.194 | 1891 Apherusa, A. O. Walker in: Ann. nat. Hist., ser.6 ©.8 
p-83 | 1893 A., G. O. Sars, Crust. Norway, v.1 p. 438. 


Head, post-antennal corners more or less produced. Side-plates of 
moderate size, encreasing in depth to the 4%. Antenna 1 shorter than 
antenna 2, without calceoli, no accessory flagellum. Upper lip rounded. 
Lower lip with small inner lobes. Mandible, molar strong, 34 joint of palp 
shorter than 24. Maxilla 1, inner plate with variable number of setae, 
outer with variable number of spines. Maxilla 2, inner plate the narrower, 
fringed on inner margin. Maxillipeds, inner plates large as compared with 
outer, outer fringed on inner margin with spine-teeth or slender spines, palp 
of moderate size. Gnathopods 1 and 2 not strong or differing much in 
size. Peraeopods 1—5 usually rather strongly built. Uropod 3, rami usually 
projecting beyond the others. Telson not large, entire. 


7 species accepted, 3 doubtful. 


Synopsis of accepted species: 


1 Back with some segments dentate — 2. 
Back with no segments dentate — 5. 
| Postero-lateral margin of pleon segment 3 smooth . 1. A.eirrus . . . p.304 
2 X Postero-lateral margin of pleon segment 3 denti- 
| eulate — 3, 
3 H Peraeon segment 7 dentate. ... - 2. 2 220. 2. A. tridentata . p.305 
Peraeon segment 7 not dentate — 4. 


BIIGORTBIR 0 a LTE RE 3. A. bispinosa . p.305 
Head, post-antennal corners strongly produced; telson 
Didambabs 774 Me Er N EN RET, 4. A. megalops . p.306 


f Gnathopods 1 and 2, 5th joint much longer than 6th 5. A. glacialis . . p.307 


Head, post-antennal corners slightly produced; telson 
; | 


ß \ Gnathopods 1 and 2, 5th joint not longer than 6th — @. 
6 | Antenna 1, 3d joint much shorter than 2d,.... 6. A. jurinei. . . p.307 
Antenna 1, 3d joint not much shorter than 24. . . 7. A. georgiana . p.308 


1. A. eirrus (Bate) 1862 Pherusa bicuspis (.P. eirrus Bate) (err., non Amphithoe b. 
Kröyer 1838!), Bate & Westwood, Brit. sess. Crust., v.1 p.253 f. | 1862 P. eirrus + 
P.b., Bate, Cat. Amphip. Brit. Mus., p. 143 t. 27 £.6; p. 144 t.27 £.7 | 1871 Halirages 
borealis, A. Boeck in: Forh. Selsk. Christian, 1870 p. 196 | 1876 H. b., A. Boeck, 
Skand. Arkt. Amphip., ©.2 p.340 t.23 £.6 | 1893 Apherusa b., G. O. Sars, Crust. Norway, 
v.1 p.441 1.155 f.2 | 1895 A. b.?, A. O. Walker in: Ann. nat. Hist., ser.6 v.15 p.468 | 
1893 Acanthozone laeviuscula?, A. Della Valle in: F. Fl. Neapel, v.20 p.619. 


Pleon segments 1 and 2 each produced into a dorsal tooth. Head 
somewhat produced in front, but not rostrate, lateral and post-antennal 


ET er ia ee 
a 


ARTEN - 


ee 
a Se ka ge 


Apherusa 305 


corners of little. prominence. Side-plates 1—3 rounded quadrangular, 4th 
obliquely rounded and little widening distally. Pleon segment 3, postero- 
lateral corners ending in a short blunt point, margin above smooth. Eyes 
small, round, black. Antenna 1, 1°* joint longer than 24 and 34 combined, 
flagellum 2—3 times as long as peduncle, 22-jointed. Antenna 2 longer, 
ultimate and penultimate joints of peduncle subequal, flagellum 2—3 times 
as long as peduncle. In J the underside of peduncle of antenna 1 and 
upperside of peduncle of antenna 2 have fascicles of setae (Bate’s figure; 
but flagellum of antenna 2 much longer than he represents). Gnathopods 1 
and 2, 5tk joint shorter than the narrow oblong 6t%, which has a short 
rather oblique palm. Gnathopod 2 larger than gnathopod 1, having the 
5th joint stouter and the 6t" longer. Peraeopods 1—5, 4 joint a little 
widened, shorter than 6", finger strong. Peraeopods 3—5, 24 joint oval, 
in peraeopod 5 oblong oval, much larger than in the other peraeopods. 
Uropod 3, rami not greatly longer than peduncle, extending much beyond 
uropod 2. Telson triangular, scarcely twice as long as broad, tip pointed, 
simple. Colour uniformly elaret-red. L. 7°5 mm. 


Arctic Ocean, North-Atlantie, North-Sea and English Channel (North-Norway, 
depth 11—19 m; Great Britain, among shore weeds). 


2. A. tridentata (Bruz.) 1859 Paramphithoe t., R. M. Bruzelius in: Svenska 
Ak. Handl., n. ser. o.3 nr.1 p.74 t.3 f.13 | 1861 Amphithopsis t., A. Boeck in: Forh. 
Skand. Naturf.. Mode 8 p.662 |; 1862 Dexamine t., Bate. Cat. Amphip. Brit. Mus.. p.376 | 
1871 Halirages tridentatus, A. Boeck in: Forh. Selsk. Christian., 1870 p.196 | 1876 
H.t., A. Boeck, Skand. Arkt. Amphip., ©.2 p.341 !1893 Apherusa tridentata, G.O. 
Br Crust. Norway, v.1 p.442 1.156 f.1 | 1895 Acanthozone EERIREE (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p. 614. 


Peraeon segment 7 and pleon segments 1 and 2 each produced into a dorsal 
tooth. Head, rostrum small, lateral corners rounded, sharply defined below, 
post-antennal corners prominent, acute. Side-plate 1, front corner rather 
angular, 1% —34 with lower margin minutely serrate, 4% much widened distally. 
Pleon segment 2, lower part of hind margin serrate, segment 3, postero-lateral 
corners sharply produced, margin above broadly lobed, cut into 12 upturned 
teeth. Eyes oval reniform, dark, larger in 9 than in oO. Antenna 1 in oO, 
about '/, length of body, 1° joint as long as 24 and 34 combined, flagellum 
rather over twice as long as peduncle, with 40 joints, 1°the largest. Antenna 2 
nearly twice as long, ultimate and penultimate joints of peduncle subequal, 
flagellum slender, about thrice as long as peduncle. Mandible, molar strong. 
Gnathopods 1 and 2, 5tk and 6th joints slender, subequal, 6" slightly widening 
distally, palm short, defined by an obtuse angle. Peraeopods 1—5 moderately 
robust, 24 joint in peraeopods 3—5 oval, with serrate hind margin, largest in 5th 
pair. Uropod 3 reaching not greatly beyond the others; inner ramus rather the 
longer, outer edge bulging at the base. Telson oblong oval, not quite twice 
as long as broad, apical border irregularly serrate, with some of the teeth 


double. Colour mottled with a magnificent carmine red. L. 9 attaining 14 m. 


Arctie Ocean (Norway southward to Lofoten Isles). 


3. A. bispinosa (Bate) 1857 Dexamine b., Bate in: Ann. nat. Hist., ser. 2 
0.19 p.142 | 1871 Halirages bispinosus, A. Boeck in: Forh. Selsk. Christian., 1870 
p-.195 | 1876 H.b., A. Boeck, Skand. Arkt. Amphip., v.2 p.338 t.23 f.9 | 1881 Pherusa 
bispinosa, Nebeski in: Arb. Inst. Wien, v.3 p. 146 | 1893 Acanthozone b., A.-Della Valle 
in: F. Fl. Neapel, v.20 p.609 t.3 £.5; t.17 £.22—-86 | 1893 Apherusa b., G. O. Sars, 


Das Tierreich. 21. Lief.: T.R.R, Stebbing, Amphipoda 1. 20 


MEER ee 
B 


306 \ Apherusa 


Crust. Norway, o.1 p.489 t.155 f£.1 | 1858 Amphitho& macrocephala, M. Sars in: Forh. 
Selsk. Christian., p. 142 | 1859 Paramphithoe elegans, R. M. Bruzelius in: Svenska 
Ak. Handl., n. ser. v8 nr.1 p.75 t.3 f.14 | 1861 Amphithopsis e., A. Boeck in: Forh. 
Skand. Naturf., Mode 8 p.662 | 1862 Atylus bispinosus + Pherusa e., Bate, Cat. Amphip. 
Brit, Mus., p. 140 t.27 £.1; p.377 | 1868 P. pontica, Üzerniavski in: Syezda Russ. Est., 
Syezda 1 Zool. p. 110 t.8 £.15. 


Pleon segments 1 and 2 each produced into a dorsal tooth. Head. 
rostrum distinet, acute, lateral corners small, angular, post-antennal forming 
a short deflexed point. Side-plate 1 subangular in front, a little expanded 
distally. Pleon segment 2, postero-lateral corners acutely produced, segment 3, 
postero-lateral corners acute, margin above serrate, upper corner forming 
a sharp upturned point, followed by a deep sinus with a bidentate projection 
in it or margin above with only 4 teeth (Üzerniavski). Eyes large, roundish, 
dark brown. Antennal in O scarcely more than '/, as long as body, 1°t joint 
longer than 24 and 34 combined, flagellum nearly 4 times as long as peduncle, 
30-jointed. Antenna 2 in O nearly twice as long, ultimate joint of peduncle 
rather longer than penultimate, flagellum long and slender. _Antennae 1 
and 2 in C longer than in O, and setose on confronting edges of peduncle; 
antenna 2, flagellum with 60—70 joints (Boeck). Gmnathopods 1 and 2 in © 
slender, feeble, 5th joint in gnathopod 1 longer than 6%, in gnathopod 2 
equal to it, 6!» joint narrow oblong, palm oblique, much shorter than hind 
margin. In C the hand is very often elongate piriform, narrowed at the 
hinge of the long weak finger, and the hand is longer than the wrist or 
5th joint (Czerniavski). Peraeopods rather slender, spinulose, 24 joint in 
peraeopods 3—5 oval, hind margin slightly serrate, largest in peraeopod 5. 
Uropod 3 reaching much beyond the others, rami spinulose, inner rather the 
longer, its outer edge bulging at the base. Telson triangular, fully twice 
as long as broad, apex very minutely tridentate. Colour variable, brightly 
mottled. L. © 6 mm, longer in greater depths. 

Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (Norway, France, Great 
Britain); Kattegat; Mediterranean. 


4. A. megalops (O.Sars) 1882 Halirages m., G.O.Sars in: Forh. Selsk. Christian., _ 
nr.18 p.102 t.5 f.4 | 1893 Apherusa m., G.O. Sars, Örust. Norway, v.1l p.443 t. 156 
f.2 | 1893 Acanthozone fulvocincta (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.614. 


Pleon segments 1 and 2 each produced into a dorsal tooth. Head, 
rostrum obsolete, lateral corners little prominent, transversely truncate, post- 
antennal strongly produced, acute, upper edge serrulate. Side-plates 1—3 
rather small, rounded quadrangular, slightly serrate below. Pleon segment 2, 
postero-lateral corners a little produced, segment 3, postero-lateral corners 
quadrate, margin above obliquely truncate, regularly serrate, the deep sinus 
above containing a simple projection within. Eyes very large, obliquely oval, 
nearly contiguous above, dark brown. Antenna 1 scarcely '/, as long as 
body, 1° joint as long as 24 and 34 combined, apically toothed, flagellum 
twice as long as peduncle. Antenna 2 twice as long, ultimate and pen- 
ultimate joints of peduncle equal, 1° joint of flagellum much the longest. 
Gnathopods 1 and 2 nearly as in A. tridentata (p. 305), peraeopods 1—5 
rather more slender, uropod 3 also similar but rather more elongate, telson 
differing in the apical border, which has a rounded notch between two acute 
points. Colour semipellueid, tinged with orange, transversely banded with 
light red. L. © 11 mm. 


Varangerfjord [North-Norway]. Depth 94--123 m. 


= Dr, Bei ae Ba ad ee ee BIER >. 
N, er 


. Apherusa 307 


5. A. glacialis (H.J. PR 1887 Amphithopsis g., H. J. Hansen in: Vid. 
Meddel., ser. 4 v.9 p. 137 t.5 £.6—6e | 1894 A. g., T. Stebbing in: Bijdr. Dierk., v. 17 
p-85 | 1895 Apherusa g., Ohlin in: Acta Univ. Lund., v.3] nr.6 p.46 | 1893 Acanthozone 
longimana (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 604. 


Body slender, back without dorsal teeth, except a pair of minute points 
on pleon segment 6. Head, rostrum obsolete, lateral corners rounded. Pleon 
segment 3, postero-lateral corners showing only an incipient tooth, margin 
above sligehtly convex. Eyes rather large, rounded, dark with light rim. 
Antennal scarcely '/, as long as body, 1°t joint as long as 24 and 34 combined, 
flagellum nearly thrice as long as peduncle. Antenna 2 rather longer, ultimate and 
penultimate joints of pedunele subequal. Maxilla 1, inner plate with 9 setae, 
outer narrow with 7 or 8 spines, slender, erowded. Maxillipeds, inner plates 
as large as outer and reaching as far, outer plates fringed on inner margin 
with spine-like setae, 1° joint of palp short, 24 broad, 4 short, with minute 
nail on the blunt apex. Gnathopods 1 and 2, 5tl joint long and narrow, 
but wider as well as much longer than the sublinear 6, which has a very 
short transverse palm and finger to match. Gnathopod 1 is longer than 
gnathopod 2, the extra length being in the 5tR and 6" joints. Peraeopods 1—5 
not very elongate, 5t" considerably the longest, 24 joint in 3d—5th pairs 
oblong ovate. Uropods 1 and 2, outer ramus the shorter; uropod 3, rami 
not greatly longer than peduncle, outer ramus very little shorter than inner. 
Telson little longer than broad, slightly narrowed a apex entire, 
furnished with a pair of setules. Colour yellowish red. L. 7—10 mm. 

Arctie Ocean, reaching lat. 76° 30° N. 


6. A. jurinei (NM.-E.) 1830 Amphithoe j., H. Milne Edwards in: Ann. Sei. nat., 
v.20 p.376 | 1840 A. jurinii, H. Milne Edwards, Hist. nat. Crust., v3 p.30 t.1 f.2| 
1891 Pherusa j., A. O. Walker in: Ann. nat, Hist., ser. 6 v.7 p.421 | 1893 Apherusa j., 
G. O. Sars, Crust. Norway, v.1 p.445 t.157 f.1 | 1895 A.j., A. O. Walker in: P. 
Liverp. biol. Soe., v.9 p.305 | 1843 Amphithoö norvegica, H. Rathke in: N. Acta Ac. 
Leop., v.201 p. 83 1.4 £.6 | 1859 Paramphithoe n., R. M. Bruzelius in: Svenska Ak. 
Handl., n. ser. v.8 nr.1 p.77 | 1871 Calliopius norvegieus, A. Boeck in: Forh. Selsk. 
Christian., 1870 p.198 | 1876 C©.n., A. Boeck, Skand. Arkt. Amphip., 0.2 p.348 t.22 
f.6 | 1862 Pherusa fuecicola (part.) (err., non Leach 1813/14!) + ?Gossea microdeutopa 
(Bate), Bate & Westwood, Brit. sess. Crust., v.1 p.255; p. 277 f. | 1862 P. f. (part.) + 
Calliope norvegica + ?G. mierodentopa, G. microdeutopa, Bate, Cat. Amphip. Brit. Mus., 
p-.145; p.150; p. 160, 387, 396 t.29 f.6 | 1891 Apherusa, A. O. Walker in: Ann. nat. 
Hist., ser. 6 v.8 p.83 | 1893 Acanthozone laeviuscula (part.), A. Della Valle in: F. Fl. - 
Neapel, v».20 p.602. 


Back without any dorsal teeth. Head, rostrum very small, lateral corners 
rounded, post-antennal acute, neither strongly produced. Side-plates 1—3 
rounded quadrangular. Pleon segment 3, postero-lateral angles forming a 
short acute projection, the margin above a triangular smooth lobe (Milne 
Edwards). Eyes oval reniform, dark brown. Antenna-l about '/, as long as 
body, 1° joint not quite as long as 24 and 34 combined, flagellum twice as 
long as peduncle, 26—28-jointed. Antenna 2 about once and a half as long as 
antenna 1 (Milne Edwards: longer than antenna 1), ultimate and penultimate 
joints of peduncle equal, flagellum twice as long as peduncle, 1° joint longest. 
Gnathopods 1 and.2 rather feeble, 5t" joint shorter than 6*%, which is sub- 
fusiform, widest at beginning of palm, palm oblique, nearly equal to hind 
margin. Peraeopods 1—5 rather stout, finger curved, 24 joint in 3I—5th 
peraeopods oval, hind margin quite smooth. Uropod 3 extending but little (Milne 
Edwards: much) beyond the others, rami narrowly lanceolate. Telson 
triangular, not quite twice as long as broad, apex obtusely pointed, having 

20* 


in Re 
IR 


308 Apherusa, Schraderia 


on each side 2 minute spinules. Colour light straw-yellow, variegated with 
reddish orange. L. © 8 mm. 

North-Atlantie and North-Sea (Norway, France, Great Britain); Kattegat; 
Mediterranean. 


7. A. georgiana (Pfeff.) 1888 Calliopius georgianus, Pfeffer in: Jahrb. Hamburg. 
Anst., v.5 p.116 t.2 f.6 | 1893 Atylus?, A. Della Valle in: F. Fl. Neapel, v.20 p.704. 

Except in size closely resembling A. jurinei (p. 307). Back of peraeon 
broad, rounded, hinder segments of pleon compressed, no dorsal teeth. Head, 
front obtuse angled, lateral corners transversely truncate. Side-plates 1—4 
not very large, but size encreasing rapidly from 1° to 4%, Pleon segment 3, 
postero-lateral corners subquadrate. Eyes tending to rounded oval. Antennal, 
peduncle stout, 1°°—34 joints nearly equal in length, 24 and 3% distally some- 
what outdrawn, flagellum (in figure) shorter than peduncle, with about 25 joints, 
alternately weakly and strongly distally outdrawn. Antenna 2 much longer, 
ultimate joint of pedunele rather longer than penultimate, flagellum twice as 
long as that ofantenna 1, with about 38 joints. No calceoli mentioned. Mandible 
with prominent molar, palp rather short, 39 joint shorter than 24, curved, acute 
at apex. Maxilla 1, inner plate with 3 setae. Maxilla 2, inner plate narrower 
but rather longer than outer. Gmathopods 1 and 2, 5tk joint nearly as long 
as 6%, subdistally lobed, more strongly in gnathopod 2, 6% joint oval, 
narrow, palm seemingly weakly defined. Peraeopods 1 and 2 more slender 
than peraeopods 3—5, otherwise like them, 4th joint in all outdrawn. Uropods1 
and 2, rami small, outer ramus the shorter; uropod 3, peduncle strong, 
smooth, rami serrate, spinose, reaching back much beyond the other uropods. 
Colour greenish grey. L. 17 mm. 

South-Atlantie (South Georgia). Under stones, in Florideae, ete. 


A. barretti (Bate) 1862 Pherusa b., Bate, Cat. Amphip. Brit. Mus., p. 146 t.27 
f.9 (10 in text) | 1898 Acanthozone fulvocincta (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p. 943. 

L. 12:5 mm. 

North-Atlantie. 


A.laevis (Hasw.) 1880 Pherusa l., Haswell in: P. Linn. Soc. N.S.Wales, v.4 
p. 260 1.9 f.4. 

L. 9 mm. 

South-Pacifie (Kiama [New South Wales]). 


A.translucens (Chilton) 1884 Panoplaea t., Chilton in: Tr. N. Zealand Inst., 
v.16 p.263 t.21 f.3a—c | 1893 Acanthozone longimana (part.)?, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 619. 


Closely related to Panoploea debilis (Leptamphopus BETELREL ERBE, p: 294): 
Chilton.  L. 14 mm. 


Lyttelton Harbour [New Zealand]. 


Gen. Schraderia Pfeff. 


1888 Schraderia (Sp. un.: 8. gracilis), Pfeffer in: Jahrb. Hamburg. Anst., »,5 p.141. 

1 species. 

S. gracilis Pfeff. 1888 $.g., Pfeffer in: Jahrb. Hamburg. Anst., ©5 p.141 t.2 
f.5 | 1893 Acanthozone?, Pontogeneia?, A. Della Valle in: F. Fl. Neapel, v.20 p.904. 


No description; only one figure. 
South-Atlantic (South Georgia). 


EEE a er u VE a Ba rer OR, TUT 
he Fre a RE. 


Pleustidae, Pleustes ! 309 


23. Fam, Pleustidae 5 


1874 Subfam. Pleustinae, Buchholz in: Zweite D. Nordpolarf., v.2 p.333 | 1888 
 _ Pleustidae, T. Stebbing in: Rep. Voy. Challenger, v.29 p. 870 ! 1893 Paramphithoidae, 
G. ©. Sars, Crust. Norway, v.1 p.343.. 


Rostrum more or less prominent. Side-plates 5—7 small. Antenna 1 
without accessory flagellum, longer than antenna 2, flagellum in both many- 
jointed. : Upper lip unsymmetrically bilobed. Lower lip, inner lobes eontinuous 

with outer, little prominent. Mandible, accessory plate sometimes wanting 
- on right, palp well developed, 34 joint falciform. Maxilla 1, inner plate small, 
_ with 1—4 setae. Maxillipeds, inner and outer plates rather small, not 
strongly armed, palp long. Gmnathopods 1 and 2 often alike, subchelate. 
Peraeopods 3—5, 24 joint expanded. Branchial vesicles rather small, simple. 
Uropod 3, rami longer than pedunele, slender, lanceolate, spinulose, outer 

 shorter than inner. Telson small, entire or (very rarely) notched, boat- 
shaped. Sexual difference very slight. 


Marine. 


5 accepted genera and 1 doubtful, 18 accepted species and 4 doubtful. 


Synopsis of accepted genera: 


1 j Mandible, molar feebly developed — 2. 
\ Mandible, molar strongly developed — 3. 


Mandibular palp of moderate size; gnathopods 1 
SB ED DOWOLEDL a ns 1. Gen. Pleustes. . . . p.309 

2 | Mandibular palp large; gnathopods 1 and 2, of 
moderate Bizarr 2. Gen. Neopleustes . . p.311 
E 8 | Maxillipeds, finger of palp strong... .. . 3. Gen. Mesopleustes . p.315 

4 Maxillipeds, finger of palp slight — 4. 

= i:, Mandible, molar eompressed; maxilla 1, inner 
4 A | DEBE WAHR TE a ee 4. Gen. Stenopleustes . p.316 

E- | Mandible, molar ceylindrie; maxilla 1, inner 
2 ee A ee 5. Gen. Sympleustes. . p.317 


em 


1. Gen. Pleustes Bate 


1858 Pleustes (Sp. un.: P. tuberculata), Bate in: Ann. nat. Hist., ser.3 v.1 p.362 

1876 P. (part.), A. Boeck, Skand. Arkt. Amphip., v.2 p.299 | 1893 P., G.O.Sars, Crast. 

2 Norway, v.1 p.343 | 1859 Paramphithoe (part.), R.M. Bruzelius in: Bvanaka Ak. Handl., 
E n. ser. v.d nr.1 p.68 | 1871 P., A. Boeck in: Forh. Selsk. Christian. .,„ 1870 p. 174. 


- .  Coating indurated, with keels or tubereles. Rostrum large, flat. 
- —  8ide-plates 1—4 large, 4th emarginate behind. Antennae 1 and 2 not 
-  _ elongate. Upper lip, lobes subequal, finely hirsute. Mandible, molar feeble, 
palp of moderate size. Maxilla 1, inner plate with 1 seta, outer with 
9 spines. Maxilla 2, inner plate the wider. Maxillipeds, outer plates scarcely 
reaching beyond 1st joint of elongate palp. Gnathopods 1 and 2 powerful, 
5'h joint short, produced to a narrow lobe, 6! large, oval, palm oblique, 
well defined, tufted with spines. Peraeopod 4 little longer than 34 and 5" 
little longer than 4, Telson broadly rounded at apex. 


2 species accepted, 3 obscure. 


Nun EP: ui Mae er ad 
ee ni m das Ener 
u ERFRPASN ER 

ee a ee 


310 Pleustes 


Synopsis of accepted species: 


Peraeon tricarinate, carinae medio-dorsal and latero- 


TORE nn ae a ER 1. P.panoplus . . . p.310 
Peraeon quinquecarinate, with 5 longitudinal rows of 
teeth or tuberalas '.: 2.5. m ser . . . 2. P. cataphractus . p.310 


1. P.panoplus (Kröyer) 1838 Amphithoe panopla, Kröyer in: Danske Selsk. Afh., 
v.7 p.270 t.2 f. 9a—i | 1846 Amphitoe p., Kreyer in: Voy. Nord, Crust. t.11 f. 2a—x | 
1859 Paramphithoe p., R. M. Bruzelius in: Svenska Ak. Handl., n. ser. v.8 nr. 1 p.69| 
1862 Pleustes panoplus, Bate, Cat. Amphip. Brit. Mus., p.63 t.9 f.9 | 1874 P. p., 
Buchholz in: Zweite D. Nordpolarf., v.2 p.334 Crust.t.6 | 1893 P.p., G. O. Sars, Crust. 
Norway, v.1 p.344 t.121 | 1894 P. panopla, 'T. Stebbing in: Bijdr. Dierk., 0.17 p.28 
(synonymy) | 1893 Acanthozone p. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.607 
t.59 £.19 | 1867 Amphithonotus cataphractus (err., non Stimpson 1853!), Packard in: 
Mem. Boston Soc., v.1 p. 298. 


Back dorsally carinate, strongly on peraeon, which also has lateral 
margins carinate; pleon segments 1—4 and 6 with a pair of dorsal projeetions, 
1t— 34 with a tubercle on each side below these. Rostrum large, obtuse or 
subacute, slightly hollowed dorsally, carinate below; lateral corners of head 
subquadrate. Side-plate 4 acute angled below emargination, 5t" and 6th 
with quadrate hind lobe. Pleon segment 3 with postero-lateral angles acute, 
slightly produced. Eyes rather small, rounded oval, prominent, dark red. 
Antenna 1 short, 1° joint about as long as 24 and 32 combined, flagellum 
scarcely thrice as long as peduncle, with 26—45 joints. Antenna 2 still 
shorter, ultimate and penultimate joints of peduncle subequal, flagellum 
subequal to peduncle, with 20—26 joints. Gnathopod 1, palm much longer 
than hind margin of 6'% joint, finger only reaching 1° of 3 transverse rows 
of palmar spines. Gmnathopod 2 more powerful, narrow lobe of 5" joint 
more projecting, 6% much more dilated at junction of palm with hind 
margin (Sars appears to reckon the palms not from this angle, but from the 
point reached by the finger). Peraeopods 3—5, 24 joint oblong quadrangular. 
Uropod 3 not very long, inner ramus not twice length of outer. Telson 
at base constrieted and having on the upper face a triangular prominence, 
apical margin broadly rounded. Colour dark brown, or whitish, or variegated 
with shades of brown. L. 9 reaching 18—-27 mm. 


Arectie Ocean (widely distributed, depth 5—113 m); Nortlı-Atlantic (West-Norway 
from Bergen northwards, depth 19=56 m; South of Halifax [Nova Scotia], depth 155 m). 


2. P. cataphractus (Stimps.) 1853 Amphithonotus e., Stimpson in: Smithson. 
Contr., v.6 nr.5 p.52 | 1876 Paramphithoe cataphracta, S. I. Smith & Harger in: Tr. 
Connect. Ac., v3 p.31 | 1876 Tritropis cataphractus, A. Boeck in: Skand. Arkt. Amphip., 
v.2 p.510 | 1888 Rhachotropis c.. T. Stebbing in: Rep. Voy. Challenger, v.29 p.278, 1720. 


Body robust. KRostrum very large, elongate triangular, pointed, 
curving downwards, concave above and with a sharp median ridge below. 
One strong median dorsal carina commencing on peraeon segment 1, 
becoming strongly dentäte on .the last peraeon segment, and ceasing on 
pleon segment 2; the next 2 carinae (proceeding outwards) are developed 
in the form of strong teeth on peraeon segments 6 and 7 and all pleon 
segments, being spine-like on pleon segment 2, and almost lamelliform on 
the last 4; the next carinae are sharp ridges, extending along the bases 
of the side-plates, and slightly continued on pleon segments 1 and 2; and“ 
the last or outer carinae are very short, extending only along the bases of 


a BE ae > A Te AR EE Yaz E er  a A  aim ing " rn "2 
Bar ei a in a LE a en nn u ei“ Se 


Pleustes, Neopleustes 3ll 


uropods 1—3. Side-plates large, angular. Eyes very large, rounded, prominent, 
yellowish or vermilion, with a black dot in the middle. Antennae 1 and 2 
short, slender, subequal. Gnathopods 1 and 2, 5tk joint slenderly produced, 
6th large, oväte, dentate below, finger about ?/, length of 6% joint. Peraeo- 
pods 1—5 slender, peraeopods 3—5, 24 joint but slightly expanded. Uropods 2 
and 3, outer ramus shorter than inner. Telson subquadrate. Colour very 
variable, generally dark reddish or brown, variegated and mottled with 
white, sometimes a uniform deep purple or pure white. When disturbed, 
rolls itself up, as if feigning death. L. 12:5 mm. 


Fundy Bay (Grand Manan). Depth 18 m. 


P. medius (Goes) 1866 Paramphithoe media, Goes in: Öfv. Ak. Förh., v.22 
p- 528 t.38 f.13 | 1871 P. m., A. Boeck in: Forh. Selsk. Christian., 1870 p. 176 | 1876 
Pleustes medius, A. Boeck, Skand. Arkt. Amphip., v. 2 p. 302 | 1893 Acanthozone 
pulchella (part.)?, A. Della Valle in: F. Fl. Neapel, v. 20 p. 605. 


L. about 8 mm. 
Arctic Ocean (Spitzbergen). Depth 38 m. 


P. oceidentalis (Stimps.) 1864 Amphithonotus o., Stimpson in: P. Ac, 
Philad., p. 158. 


Closely allied to P. panoplus and P. cataphraetus. L. 19 mm. 
North-Paeifie (North-America). 


P. tuberculatus Bate 1858 P. tuberculata, Bate in: Ann. nat. Hist., ser.3 v.1 
p.362 | 1893 P. tuberculatus, G.O.Sars, Crust. Norway, v.1 p.344 | 1871 Paramphithoe 
panopla (err., non Amphithoe p. Kröyer 1838!), A. Boeck in: Forh. Selsk. Christian., 
1870 p.176 | 1876 Pleustes panoplus, A. Boeck, Skand. Arkt. Amphip., v.2 p.303 | ?1894 
P. panopla, T. Stebbing in: Bijdr. Dierk., v.17 p.28 | 1898 Acanthozone p. (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p.607 | ?1858 Amphithoe panoploides, M.Sars in: Forh. 
Selsk. Christian., p. 138. 


Perhaps only an aged form of P. cataphraetus. L. 21 mm. 


Arectie Ocean. S 


2. Gen. Neopleustes Stebb.*) 


1859 Paramphithoe (part.), R.M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 
ur.1 p.68 | 1866 Paramphithoö (part.), Go&s in: Öfv. Ak. Förh., v.22 p.523 | 1898 
P., G. O. Sars, Crust. Norway, ®.1 p.346 | 1861 Amphithopsis (part.) + P. (part.), 
A. Boeck in: Forh. Skand. Naturf., Mede 8 p. 661, 662. 


Body slender, not indurated. Head more or less produced over antenna 1, 
post-antennal corners usually projecting acutely. Side-plates not power- 
fully developed. Antenna 1 usually long and much longer than antenna 2. 
Upper lip unsymmetrically bilobed, ineision oblique. Mandible, molar weak, 
palp very large. Maxillae 1 and 2 nearly as in Pleustes. Maxillipeds 
differing by joint 3 of palp distally attenuated, 4" spiniform. Gnathopods 1. 
and 2 feeble to moderately strong. Peraeopods more or less elongated. 
Telson hollowed above, carinate below. 


7 species. 


*) Gen. nov. veoc, new, and Pleustes. Type is Amphitoe pulchella Kroyer (1846). 


312 Neopleustes 


Synopsis of species: 


1 Dorsum with teeth — 2. 
Dorsum without teeth — 3. 
Dorsum with 5 or more teeth . . .2...... 1. N. pulehellus . » p.312 
Doraum with 8 teethi 27, US 2. N. boeckii . . . p.312 
Dotsum with Sites... nr Een AR ö. N. bicuspis. . . p.813 
Dorkım: with 1 Wolle Sa ren 4. N. monocuspis . p.313 
3 Antenba I shot 5. N. brevicornis . p.313 
Antenna 1 elongate —- 4. 
4 | Gnathopods 1 and 2 feeble. .... 2». 2... 6. N. assimilis . . p.314 
Gnathopods 1 and 2 moderately strong . . . - - 7. N. bairdi. . . . p.3l4 


1. N. pulchellus (Krayer) 1846 Amphitoe pulchella., Kroyer in: Voy.Nord, Crust. 
t.10 f.2a—r | 1859 Paramphithoe p., R. M. Bruzelius in: Svenska Ak. Handl., n. ser. «3 
nr.1 p.70 | 1887 P.p., H. J. Hansen in: Vid. Meddel., ser.4 v.9 p.119 t.5 £.2—2b | 
1893 P.p., G. O. Sars, Crust. Norway, v.1 p.346 t.122 f.1 | 1862 Pherusa p., Bate, 
Cat. Amphip. Brit. Mus., p. 143 t.27 £.5 | 1876 Pleustes pulchellus (part.), A. Boeck, Skand. 
Arkt. Amphip., v.2 p.306 (not fig.) | 1893 Acanthozone pulchella (part), A. Della Valle 
in: F. Fl. Neapel, 0.20 p.605 t.59 f.18 | 1876 Pleustes euacanthus, G. O. Sars in: Arch. 
Naturv. Kristian., v.2 p.256 | 1885 Paramphithoe ewacantha, G.O.Sars in: Norske 
Nordhavs-Exp., 0.6 Crust. I p. 168 t. 14 f. 3. 


Sharp compressed teeth on peraeon segments 5—7, sometimes also 
on 4 and others; similar teeth on pleon segments 1 and 2, an upturned 
lamellar expansion on segment 3. Head produced to rather broad blunt 
rostrum, post-antennal corners spiniform. Side-plate 1 tapering to blunt 
point, a little serrate behind, 24 more rounded apically, also serrate, hind 
margin of 4 very oblique, acute below emargination. Pleon segment 3, 
postero-lateral angles acutely produced, slightly upturned, hind margin straight, 
finely serrulate. Eyes moderate, irregular oval, dark red. Antenna 1 very 
long, 1° joint as long as 24 and 34 combined, flagellum 4 to 5 times as 
long as peduncle, with 90 joints, 1° longer than 34 joint of peduncle. 
Antenna 2 scarcely '/, as long as antenna 1, ultimate and penultimate joints 
of peduncle equal, flagellum about twice as long as peduncle. Gnathopods 1 
and 2 rather feeble, 5th joint rather long, little expanded, 6! joint longer, 
oblong oval, widening distally a little, palm shorter than hind margin, 
forming with it a very obtuse angle. Gnathopod 2 the stronger. Peraeo- 
pods 1—5, finger strong, curved; peraeopods 3—5, 24 joint oblong oval, 
serrulate behind. Uropod 3, inner ramus long, outer more than '/, as long, 
much longer than peduncle. Telson very small, oval, with small dentiform 
projection on each side near apex. Colour whitish, pellueid, mottled with 
dark brown. L. O reaching 17 mm. 

Arctie Ocean, North-Atlantic, North-Sea and Skagerrak (Greenland, Iceland, 
Spitzbergen, Norway, Bohuslän). Depth 75—282 m. 


2. N. boeckii (H. J. Hansen) 1876 Pleustes pulchellus (part.) (err., non Amphitoe 
pulchella Kroyer 1846!), A. Boeck, Skand. Arkt. Ampbhip., v.2 t.23 f.1 (not text) | 1893 
Acanthozone pulchella (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.605 | 1887 Param- 
phithoe boeckii, H. J. Hansen in: Vid. Meddel., n. ser. 4 v.9 p. 121 t.5 f. 8—3b | 1893 
P.b., G. O. Sars, Crust. Norway, v.1 p.348 t.122 f.2. 


Sharp compressed teeth only on peraeon segment 7 and pleon segments 1 
and 2. Head produced to strongly carinate acute rostrum, post-antennal 
corners little produced. Side-plates not serrate, 1° apically rounded. Pleon 
segment 3, postero-lateral angles acutely produced, hind margin convex, 


Re 
. 
= 


N N 


Neopleustes 3l3 


smooth. Eyes very large, rownded triangular. Antenna 1, 1° joint of 


flagellum shorter than 39 of peduncle. Gnathopods 1 and 2 less slender 


than in N. pulchellus, 6'% joint more regularly oblong oval. Peraeopods 1—5 
less robust; peraeopods 3—5, 24 joint with hind margin smooth. Uropod 3, 
outer ramus little longer than '/, inner. Telson about twice as long as 
broad, apex without dentiform projections. Colour pale red (Holböll). In 
other points agreeing with N. pulchellus. L. Q scarcely more than 8 mm. 


Arctic Ocean (Greenland). Depth 9—113 m. 


3. N. bicuspis (Kröyer) 1838 Amphithoe b., (Reinhardt in MS.) Kröyer in: 
Danske Selsk. Afh., v7 p.273 t.2 f.10a—e | 1859 Paramphithoe b., R. M. Bruzelius 
in: Svenska Ak. Handl., n. ser. v.3 nr.1 p.73 | 1887 P.b., H. J. Hansen in: Vid. Meddel., 
ser.4 v.9 p.122| 1893 P.b., G.O. Sars, Crust. Norway, v.1 p.349 t.123 f.1 | 1895 
Bb. (part.), A.O.Walker in: P. Liverp. biol. Soe., v.9 p.303 | 1861 Amphithopsis b., 
A. Boeck in: Forh. Skand. Naturf., Mede 8 p.662 | 1876 Pleustes b., A. Boeck, Skand. 
Arkt. Amphip., v.2 p. 308 | 1893 Acanthozone pulchella (part.)?, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 605. 


Not carinate, but dorsally toothed on pleon segments 1 and 2. Rostrum 
small, obtuse, post-antennal corners little produced. Side-plate 1 scarcely 
expanded distally. Pleon segment 3, postero-lateral angles forming a small 
tooth with sinus above. Eyes rather small, oval triangular, dark red. 
Antenna 1, 1° joint longer than 24 and 3% combined, flagellum 4 or 5 times 
as long as peduncle, 90-jointed. Antenna 2 much shorter, ultimate joint of 
peduncle scarcely as long as penultimate, flagellum about twice as long as 
peduncle, 60-jointed. Maxilla 1 with 1 seta (Bruzelius; Boeck: 3 setae) on 
inner plate. Gmathopods I and 2, 5tk joint short, lobe setose, 6!" rather large, as 
long as 24 joint, tapering a little, palm spinose, leaving scarcely any hind margin. 
Peraeopods 1—5 rather slender, spinulose; peraeopods 3—5 subequal, 24 joint 
oval, serrulate behind. Uropod 3, outer ramus scarcely more than half as long 
as inner, longer than peduncle. Telson nearly twice as long as broad, apex 
evenly rounded. Colour whitish, tinged with yellowish, mottled with reddish 
brown spots, but sometimes almost pure white. L. Qo 12—14 mm. 

Aretice Ocean, North-Atlantie, North-Sea and Skagerrak (Greenland, Spitzbergen, 
Iceland, Labrador, Norway, Bohuslän, France, Great Britain); Kattegat. Depth 6—113m. 


4. N. monoeuspis (O.Sars) 1893 Paramphithoe m., G.O. Sars, Crust. Norway, 
v.1 p.351 t.123 f.2 , 1895 P. bieuspis (part.). A. O. Walker- in: P. Liverp. biol. Soc., 


©.9 p.308. 


Dorsal tooth only on pleon segment 2. Rostrum small, obtuse, post- 
antennal corners sharply produced. Side-plate 1 broad, distinetly expanded 
distally, with denticle at hind corner. Pleon segment 3, produced angles 
without sinus above. Eyes large, almost regularly oval. dark red. Antenna 1, 
1% joint subequal to 24 and 34 combined. Gnathopods 1 and 2 stouter than 
in N. bicuspis. Peraeopods 1—5 rather strong, 4" longer than 34, 5th than 4th, 
Uropod 3, outer ramus much longer than '/, inner. Telson oval, not nearly 
twice as long as broad. Colour whitish, sparingly mottled, except in front 
of head and dark peduncles of antennae. L. © 11 mm. 


Arctic Ocean (Greenland, Hammerfest [Finmark]). Depth 56—94 m. 
5. N. brevicornis (O. Sars) 1882 Paramphithoö b., G. O. Sars in: Forh. Selsk. 


Christian., nr. 18 p.98 t.4 £. 11, 11a | 1893 P. b., G. O. Sars, Crust. Norway, v.l p.853 
t.124 f.2 | ?1887 P. gracilis, H. J. Hansen in: Vid. Meddel., ser. 4 v.9 p. 124. 


RR, EA ge I a ei FE alle Sue en we FREE 
ee EEE SEN NE 2 


514 Neopleustes 


Stout, compact, no dorsal projections. Rostrum very slight, post- 
antennal corners little produced. Side-plates 1—4 deep, 1° rather expanded 
distally, 15—3@ with dentiele at hind corner, 4! subquadrate below emargination. 
Pleon segment 3, postero-lateral corners subquadrate, point obtuse. Eyes 
small, rounded, dark red. .Antennae 1 and 2 unusually short. Antenna 1, 
1° joint rather thick, as long as 24 and 34 combined, flagellum not twice 
as long as peduncle, 12-jointed. Antenna 2 a little shorter, ultimate and 
penultimate joints of peduncle subequal, together as long as flagellum. 
Gnathopods 1 and 2 moderately strong, closely alike, 5t" joint very short, 
lobe linguiform, 6!" very large, as long as 24 joint, widest at palm, which 
is as long as hind margin, convex, defined by projeeting angle and palmar 
spines. Peraeopods 1—5 moderately long and spinulose, very slender. 
Peraeopods 3—5, 2 joint oval, largest in peraeopod 5 with hind margin nearly 
straight. Uropod 3 comparatively short, outer ramus °/, as long as inner. 
Telson oblong triangular, not nearly twice as long as broad at base, apex 
obtuse. Colour whitish, more or less darkened with dark brownish violet. 
L. © searcely 4 mm. 


Aretie Ocean (North-Norway; Greenland?). 


6. N. assimilis (O. Sars) 1882 Paramphithoe a., G. O. Sars in: Forh. Selsk. 
Christian., nr.18 p.99 t.5 £.1,1a | 1887 P.a., H.J. Hansen in: Vid. Meddel., ser. 4 
v.9 p.124 | 1893 P.a., G. O. Sars, Crust. Norway, v.1 p.352 t.124 f.1 | 1893 Acan- 
thozone pulchella (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 605. 


With no dorsal projeetions. Rostrum short, obtuse, post-antennal 
corners little produced. Side-plate 1 slightly expanded distally, 24 and 34 large, 
1°t— 34 with denticle at hind corner, 4" acute below emargination, narrow 
distally. Pleon segment 3, postero-lateral corners acutely produced, but 
not into a tooth. Eyes rather large, rounded triangular. Antenna 1 very long, 
1st joint longer than 24 and 3% combined, flagellum more than 4 times as long 
as peduncle. Antenna 2 much shorter, ultimate joint of peduncle longer than 
penultimate, flagellum about twice as long as peduncle. Gmnathopods 1 
and 2 rather feeble, 5!" joint rather long and little widened, 6 longer 
than 5%, not nearly so long as 24, widest at palm, which is not nearly 
so long as spinose hind margin. Peraeopods 1—5 long and slender. Peraeo- 
pods 3—5, 24 joint oval, serrulate behind, in peraeopod 5 its hind margin 
very convex. Uropod.3, rami spinose, outer longer than peduncle, little 
over half as long as inner. Telson fully twice as long as broad, apex evenly 
rounded. L. © 8 mm. 


Aretie Ocean and North-Atlantie (West-Norway; Greenland, depth 19—113 m). 


7. N. bairdi (Boeck) 1872 Paramphitho£ b., A. Boeck in: Forh. Selsk. Christian., 
1871 p.45, 50 t.1 £.3. 


Dorsum without keel or teeth. Head a little outdrawn, forming 
no proper rostrum; post-antennal corners blunt. Side-plates 1—4 large, 
distally rounded, feebly serrulate on lower hind margin. Pleon segment 3, 
postero-lateral corners subquadrate. Eyes moderately large, oval, black. 
Antenna 1, 1° joint stout, longer than 24 and 34 combined, flagellum about 
thrice as. long as peduncle, 40—45-jointed. Antenna 2 much shorter, 
ultimate joint of peduncle longer than penultimate, flagellum much longer 
than peduncle, about 24-jointed. Mandibular palp, 39 joint much longer than 24, 
Maxilla 2, inner and outer plates small. Maxillipeds, outer plates not reaching 


Neopleustes, Mesopleustes 315 


middle of palp’s 24 joint, palp’s 34 joint tapering distally, finger spine-like. 
“Gnathopods 1 and 2, 5% joint short, triangular, lobe rounded, 6* joint very large, 
oval, widest at junction of subequal palm and hind margin, larger in 
gnathopod 2 than in gnathopod 1. Peraeopods 3—5, 24 joint large, feebly 
serrate, 4" joint produced downward. Uropod 3, peduncle very short, rami 
spinose, outer about ®/, as long as inner. Telson oval. L. ?. 


North-Paeifie (California). 


3. Gen. Mesopleustes Stebb. 


1899 Mesopleustes (Sp. typ.: Pleustes abyssorum), T. Stebbing in: Ann. nat. Hist., 
ser. 7 v.4 p.209. | 


Coating indurated, carinate. Rostrum large. Side-plates 1—4 distally 
narrowed, 5tk and 6 with hind lobe deeper than front. Upper lip with small 
‘oblique ineision. Mandible, accessory plate on both left and right, molar 
prominent, strong, oval, 34 joint of palp longer than 24. Maxilla 1, inner 
plate with 2 short and 2 long plumose setae, outer plate with 10 spines. 
Maxillipeds, inner plates with 3 .spine-teeth in a group at apical angle, outer 
plates scarcely reaching beyond 1° joint of palp, inner margin unarmed, 
apical with 6 close-set spines, 1% and 24 joints of palp equal, 34 rather 
shorter, as long as strong finger. Gnathopods 1 and 2 strong, 5 joint 
eup-like, 6! broad oblong oval, palm well defined. Gmathopod 2 larger 
than gnathopod 1. Peraeopods 1—5 robust, subequal. Telson subrotund. 


1 species. 


1. M.abyssorum (Stebb.) 1888 Pleustes a., T.Stebbing in: Rep. Voy. Challenger, 
©.29 p.872 t.67 | 1893 Acanthozone a., A. Della Valle in: F. Fl. Neapel, 0.20 p.609 
t.59 f.21 | 1899 Pleustes a., Mesopleustes sp. typ., T. Stebbing in: Ann. nat. Hist., 
ser. 7 v.4 p. 209. 


In general appearence resembling Pleustes panoplus (p. 310). Peraeon 
and pleon segments all carinate except 4! of pleon; segments imbricate, 
pleon segment 3 with erect dorsal tooth. Rostrum long, narrow, carinate 
below, lateral and post-antennal corners little projeeting. Side-plate 1 
narrowly produced forward, 2 denticles on hind margin, 24—4t% successively 
encreasing in depth, vertically ridged, 4% with very oblique hind margin 
below emargination, 5!" with distally narrowed hind lobe. Pleon segment 3, 
postero-lateral corners produced into a small tooth. Eyes small, oval. Antennal, 
1° joint a little longer than 24, 3 more than '/, as long as 24, flagellum with 
44 joints, 1° longest. Antenna 2 much shorter, ultimate joint of peduncle 
rather longer than penultimate, flagellum with 24 joints, 1° longest. Gnatho- 
pods 1 and 2 spinose, 5tk joint as broad as long; gnathopod 1, 6! joint 
with palm divided between 2 broad shallow emarginations, finger reaching 
beyond them. Gnathopod 2 much larger, palm with deep cavity between 
its blunt end and a large tooth or process near the finger hinge. Peraeo- 
pods 1—5 nearly as in Sympleustes latipes (p. 317), but 24 joint oblong, hind 
margin sinuous, with much produced lobe. Uropod 3, outer ramus little 
longer than peduncle, only half length of inner. Telson short, as broad as 
long. L. about 17 mm (if fully extended). 


Southern Indian Ocean (near Marion Island). Depth 3013 m. 


316 Stenopleustes 


4. Gen. Stenopleustes 0. Sars 
1893 Stenopleustes, G. O. Sars, Crust. Norway; v.1 p. 354. 


Body slender, smooth, thin-skinned. Rostrum and post-antennal corners: 
little produced. Side-plates not very large. Antenna 1 slender, much longer 
than antenna 2. Lips nearly as in Neopleustes (p. 311). Mandible, molar 
powerful, compressed, palp moderate. Maxilla 1, inner plate with 1 seta.. 
Maxillipeds, inner plates rather broad, outer plates small, with a few hairs, 
34 joint of palp apically much produced. Gnathopods 1 and 2 imperfectly 
subchelate, not strong. Peraeopods 1—5 rather slender. Telson nearly as. 
in Neopleustes. 


2 species. 


Synopsis of species: 


te 2 ER RE re A 1. 8. malmgreni . p.316 
a u one ES a ea FE a a 2. 8.nodifer . . p.316 


1. S. malmgreni (Boeck) 1871 Amphithopsis m., A. Boeck in: Forh. Selsk. 
Christian., 1870 p. 199 | 1876 A. m., A. Boeck, Skand. Arkt. Amphip., v.2 p.350 t. 23 
f.7 | 1893 Stenopleustes m., &. O. Sars, Crust. Norway, ®.1 p.355 t.125 f.1 | 1893 
Acanthozone longicaudata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 605. 


Pleon without nodules. Head, rostrum short, blunt, lateral corners angular. 
Pleon segment 3, postero-lateral corners quadrate. Eyes very large, reniform, 
light red. Antenna 1, 1° joint subequal to 24 and 34 combined, flagellum 
nearly 6 times as long as peduncle, 1° joint elongate. Antenna 2, ultimate 
joint of pedunele longer than penultimate, flagellum longer than peduncle. 
Gnathopod 1, 5tR joint rather longer than.oblong oval 6%", palm very oblique, 
spinose. Gnathopod 2 rather larger, 5t" joint rather shorter than 6th, Peraeo- 
pods 3—5, 24 joint large oval. Uropod 3, inner ramus 3 times as long 
as peduncle, outer much the shorter, both spinose. Telson en oval. 
Colour whitish, sometimes faintly cameous. L. Q 7 mm. 


Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (Norway). Depth 
150—282 m. 


2. S.nodifer (O.Sars) 1882 Amphithopsis nodifera, G.O.Sars in: Forh. Selsk. 
Christian., nr. 18 p. 103 t.5 £.6a—b | 1893 Stenopleustesnodifer, G.O.Sars, Crust. Norway, 
v.1 p.356 t.125 £.2 | 1895 S.n., A. O. Walker in: P. Liverp. biol. Soe., v.9 p. 303 | 1893: 
Acanthozone nodifera, A. Della Valle in: F. Fl. Neapel, v.20 p. 604 t.59 £. 15. 


Pleon segments 1 and 2 ending dorsally in pair of juxtaposed nodi- 
form projections (often difficult to make out). Head, rostrum a little produced, 
lateral corners rounded. Pleon segment 3, postero-lateral corners somewhat 
produced. Eyes large, reniform, dark red. Antenna 1, 1° joint rather longer 
than 24 and 34 combined. Gnathopods 1 and 2, palm rather shorter than 
in S. malmgreni. Telson longer, triangular with narrowly rounded apex. 
Other points elosely agreeing with S. malmgreni. Colour whitish, pellucid, 
speckled yellowish or brownish; pedunele of antenna 1 and uropods 1—3 
generally dark brown (Sars); limbs and specially peraeon segments 4—6 
speckled with dark red (Walker. L. 2 3—5 mm. 


North-Atlantie, North-Sea and Skagerrak (Norway, depth 56-188 m; Great 
Britain, depth 57 m). 


Er al cn 3. au pn Male un Zi ec Al a nl an, 


Sympleustes 817 


5. Gen. Sympleustes Stebb. 
1861 Amphithopsis (part.), A. Boeck in: Forh. Skand. Naturf., Mode 8 p.661 | 


1899 Sympleustes, T. Stebbing in: Ann. nat. Hist., ser. 7 v.4 p. 209. 


Not very slender. Rostrum small, post-antennal corners more or less 
projeeting. Side-plates moderate. Upper lip as in Neopleustes (p. 311). Molar 


of mandible strong, not compressed but eylindrical, palp rather large. Maxilla 1, 


inner plate with 2 setae. Other mouth-parts nearly as in Stenopleustes, but 
palp of maxillipeds variable, finger slight. Gnathopod 2 usually much stronger 
than gnathopod 1, and more distinetly subchelate. Peraeopods 1—5, stoutness 
varying. Telson entire or (in S. megacheir) notched. 


6 species. 


Synopsis of species: 


1 f Telson with notehed apex . .. ve... 1. 8. megacheir.. . . p.317 
\ Telson with apex entire — 2. 

9 Back not entirely smooth — 38. 
Back entirely smooth — 4. 

3 With obtuse dorsal projeetion. .» 2» ..... 2. 8-latipes .. .. -:P:817 
Wr Dartial ahrınh u ee nk 3. 8. grandimanus . p.318 

4 Antenna 1, 1st joint with spiniform process. . . 4.8. glaber  .:s... 9318 
Antenna 1, 1st joint without spiniform process — 5. 

5 Gnathopods 1 and 2, palm not ineised. . ... . 5. 8. pulchellus. . . p.319 
Gnathopods 1 and 2, palm deeply ineised . . . 6. 8. olrikü. ... . p- 319 


1. S. megacheir (A. Walker) 1897 Parapleustes m., A. O. Walker in: J. Linn. 
Soe., v.26 p.230 t.18 f.4-—4c. 


Pleon segment 2 having a small dorsal tooth. Side-plates 1 and 2 
small, front angle of 1° acute. Pleon segment 3, postero-lateral corners 
obtusely quadrate. Eyes wanting. Antenna 1 about °, as long as body, 
1% joint as long as 24 and 34 combined. Antenna 2 shorter, ultimate joint of 
peduncle rather shorter than penultimate. Maxillipeds strong, finger longer 
than 34 joint of palp; other mouth-parts not described. Gmnathopod 1, 24 joint 


not longer than 6*", 5tk shorter than ovate 6", both setose on hind margin, 


finger with distal half serrate. Gnathopod 2, 5t% joint short, cup-shaped, 
6% very large, the long oblique palm having three erenate lobes and two 


'sinuses, and being defined by a small tooth. Peraeopods 1—5 and uropod 3 


as in S. pulchellus (p. 319). Telson spoon-shaped, apically notched for one 
quarter of its length. L. 8 mm. 


North-Atlantie (South-West of Ireland). Depth 1371 m. 


2. S. latipes (Sars) 1858 Amphithoe I., M. Sars, in: Forh. Selsk. Christian., 
p-139 | 1871 Amphithopsis1., A. Boeck in: Forh. Selsk. Christian, 1870 p.200 | 1876 
A.l., A. Boeck, Skand. Arkt. Amphip., v.2 p.355 t.22 f.4 | 1887 A.l., H. J. Hansen 
in: Vid. Meddel., ser.4 v.9 p.185 t.5 f.4 | 1893 Parapleustes l., G.O. Sars, Crust. 
Norway. v.1 p.360 t. 127 | 1897 P.1., J. Bonnier in: Ann. Univ. Lyon, v.26 p. 645 t. 38 
f.3 | 1893 Acanthozone I. (part.), A. Della Valle in: F. Fl. Neapel, 0.20 p. 608 t.59 f. 20] 
1899 Amphithoe l., Sympleustes (part.), T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p:209| 
1862 Calliope ossiani (Bate) + C. fingalli, Bate & Westwood, Brit. sess. Orust., v.1 p.261f.; 
p-263 f. | 1862 C.0.+0.f., Bate, Cat. Amphip. Brit. Mus., p.149 t.28 f.3; p. 377 | 
1869 Calliopius 0.+C. f., A. M. Norman in: Rep. Brit. Ass., Meet. 38 p. 280, 281. 


Robust; peraeon segment 7 and pleon segments 1—3 each with obtuse 
dorsal projeetion, that in pleon segment 3 compressed gibbous. Head, 


318 Sympleustes 


rostrum small, lateral corners emarginate, post-antennal corners little: 
produced. Side-plates 1—3 without denticle, 1° acute at lower front corner, 
4th deep, narrow below, 5!" and 6tk with hind lobe much deeper than front. 
Pleon segment 3, postero-lateral corners subquadrate, obscurely produced. 
Eyes rather large, oblong reniform, dark red. Antenna 1, 1° joint longer 
than 24 and 39 combined, apically somewhat produced, flagellum about thrice 
as long as pedunele, 1° joint longer than 34 of peduncle, accessory flagellum 
rudimentary (Bonnier). Antenna 2, ultimate joint of peduncle longer than 
penultimate, flagellum little longer than pedunele. Upper lip very unsymmetrical. 
Mandible, 3% joint of palp much longer than 24. Maxillipeds, 34 joint of 
palp fully as long as 24, apically acutely produced. Gnathopod 1 rather 
feeble, 5! joint distally broad, as long as 6!", palm well defined, equal to 
hind margin and almost at right angles to it, so that the joint is sub- 
triangular. Gnathopod 2 powerful, 5 joint short, cup-like, 6! very large, 
expanded distally, palm excavate between a small projection and a broadly 
truncate lobe armed with 5 stout spines, the point of the finger elosing into 
a groove between these and a similarly armed surface ridge. Peraeopods 3—5 
very strong, 29 joint oval, hind margin quite smooth, nearly straight, 4 
and 5! expanded, produced downward; all peraeopods spinose, with finger 
strong. Uropod 3, outer ramus °/, as long as inner. Telson distinetly boat- 
shaped, very small, apex evenly but not broadly rounded. Colour whitish, 
transversely banded with patches of dark brown, found also on peduncle of 
antennae and on legs. L. 9 reaching 12 mm. 


Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (Greenland, Norway, 
Great Britain), depth 56—830 m; Bay of Biscay, depth 1410 m. 


3. S. grandimanus (Ühevreux) 1887 Amphithopsis grandimana, Chevreux in: 
Bull. Soc. zool. France, v.12 p.570 | 1899 A.g., Sympleustes (part.), T. Stebbing in: 
Ann. nat. Hist., ser.7 v.4 p.209 | 1898 Acanthozone latipes (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 608. 


Said to be near to S. pulchellus. Compressed, pleon segments 1—3 
slightly carinate. Head, rostrum very short, lateral corners rounded. Side- 
plates not deep. Pleon segment 3, postero-lateral corners almost quadrate. 
Eyes large, oval. Antenna1 long, 24 joint almost as long as 1°, 34 half as long 
as,24, flagellum with 53 joints, 1° long. Antenna 2, °”/, as long as antenna 1, 
ultimate joint of peduncle a little shorter than penultimate, flagellum 29-jointed. 
Mandible, 34 joint of palp very long. Gmnathopod 1, 5tt joint rather shorter 
than the broadly oval 6, Gmnathopod 2, 6 joint very large, elongate oval, 
front margin with strong sharp apical tooth, palm slightly erenulate, spinose, 
well defined by a strong tooth. Peraeopods 1—5 large, robust; peraeo- 
pods 3—5, 24 joint broadly oval, slightly produced downward, smooth behind. 
Uropods 1—3 elongate, outer ramus only a little shorter than inner. Telson 
very short, rounded. L. 8 mm. 


North-Atlantie (Cape Finisterre). Depth 510.m. 


4. 8. glaber (Boeck) 1861 Amphithopsis g., A. Boeck in: Forh. Skand. Naturf., 
Mode 8 p. 662 | 1871 Paramphithoe glabra, A. Boeck in: Forh. Selsk. Christian., 1870 
p.175 | 1876 Pleustes glaber, A. Boeck, Skand. Arkt. Amphip., v.2 p.300 t.21 f£.1 | 1893 
Parapleustes g., &.O. Sars, Orust. Norway, v1 p.358 t.126 £.1 | 1899 Amphithopsis g., 
Sympleustes (part.), T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p.209 | 1866 Paramphithoe 
exigua, Goes in: Öfr. Ak. Förh., v.22 p.523 t.38 f.12 | 1898 Acanthozone pulchella 
(part.)?, A. Della Valle in: F. Fl. "Neapel, v.20 p. 605. 


| 
g 
; 


ae Pa = a a 0 a Zr DT nd sn at 


T Da er = ne 


Sympleustes 319 


Rather slender, smooth. Head, rostrum not large but distinet, lateral 
corners acute, post-antennal corners projecting spiniform. Side-plates 1—3 
with tooth at lower hind corner, 5!" with hind lobe little deeper than 
front. Pleon segment 3, postero-lateral angles forming a little recurved 
tooth. Eyes moderate, rounded oval, dark red. Antenna 1, 1° joint much 
longer than 24 and 34 combined, with spiniform apical process, flagellum 
more than thrice as long as pedunele, 1° joint long. Antenna 2 much 
shorter, ultimate joint of peduncle longer than penultimate, flagellum not 


 twice as long as pedunele. Upper lip not very unsymmetrical. Mandible, 


34 joint of palp not greatly longer than 2%. Maxillipeds, 34 joint of palp 
shorter than 24, not apically produced. Gnathopods 1 and 2 not large, nor 
very unequal, 5% joint much shorter than 6!%, lobe narrowly rounded, densely 
setose, 6 oblong oval, palm very oblique, much longer than hind margin, 
defined by fascieles of strong spines. Peraeopods 3—5, 24 joint regularly 
oval, serrulate behind. Uropod 3, outer ramus more slender than inner, less 
than ?/, of its length. Telson oval, nearly twice as long as broad. Colour 
generally whitish, marbled with reddish brown patches. L. © about 6 mm. 


Arctie Ocean, North-Atlantic, North-Sea and Skagerrak (Greenland, Spitzbergen, 
Iceland, Murmen Coast, Norway); Kattegat. 


5. S. pulchellus (0, Sars) 1876 Amphithopsis pulchella, G. O. Sars in: Arch. 
Naturv. Kristian., v.2 p.258 | 1885 A.p., G.O.Sars in: Norske Nordhavs-Exp., v. 6 
Crust. I p. 175 t.14 £.6 | 1893 Parapleustes pulchellus, G. O. Sars, Crust. Norway, v.1 
p-359 t.126 f.2 | 1899 Amphithopsis pulchella, Sympleustes (part.), T. Stebbing in: 
Ann. nat. Hist., ser.7 v.4 p.209 | 1893 Acanthozone latipes (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 608. 


Not very slender, smooth. Head, rostrum very small, lateral corners 
angular, post-antennal corners little produced. Side-plates 1—3, dentiele 
nearly obsolete, 4 narrow below, 5t" and 6%, hind lobe much deeper than 
front. Pleon segment 3, postero-lateral corners obtusely quadrate. Eyes 
moderate, reniform, bright red. Antenna 1, 1° joint scarcely longer than 
24 and 34 combined, not produced, flagellum about thrice as long as peduncle, 
18 joint long. Antenna 2, ultimate and penultimate joints of peduncle sub- 
equal, flagellum not nearly twice as long as peduncle. Gnathopod 1 rather 
slender, 5tk joint nearly as long as 6!%, lobe broad, setose, 6!" slightly 
widening distally, palm much shorter than hind margin, imperfectly defined 
between 2 sets of 3 small spines. Gnathopod 2 much stronger, not much 
longer, 5tk joint short, lobe narrow, setose, 6!" slightly widening distally, 
palm rather sinuous, slightly oblique, much shorter than hind margin, well 
defined between 2 sets of 3 strong spines. Peraeopods 3—5, 24 joint large 
oval, smooth behind. Uropod 3, outer ramus about ?/, as long as inner, 
both with few marginal spines. Telson rather small; distinetly boat-shaped, 
apex narrowly obtuse. Colour whitish with small pinkish spots all over. 
L. © 7 mm. 


Arctic Ocean (Greenland, Spitzbergen, Iceland, Varangerfjord). Depth 94—877 m. 


6. S. olrikii (H. J. Hansen) 1887 Amphithopsis o., H. J. Hansen in: Vid. 
Meddel., ser.4 v.9 p.136 t.5 £.5—5b | 1892 A. olriki,. Parapleustes (part.), G. O. Sars, 
Crust. Norway, v.1 p.357 | 1899 A. olrikii, Sympleustes (part.), T. Stebbing in: Ann. 
nat. Hist., ser.7 v.4 p.209 | 1893 Acanthozone latipes (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 608. 


320 Sympleustes, Parapleustes, Paramphithoidae 


Rather robust, smooth. Head, lateral corners obtuse. Side-plate 1 
shallow, 24 —4th suecessively deeper, all 4 narrow distally, 5% with hind lobe 
much deeper than front. Pleon segment 3, postero-lateral corners obtusely 
quadrate. Eyes large, subreniform. Antenna 1, 1° joint longer than 24 
and 34 combined. Antenna 2 little more than '/, length of antenna 1. 
Gnathopod 1 rather stout, 5% joint a little shorter and distally wider than 
6th, 66th oblong, palm very oblique but well defined, near middle deeply 
and irregularly incised, incision armed with 2 spines. Gnathopod 2 rather _ 
longer and stronger, 5" joint like that of gnathopod 1, but 6tR as wide as 
5th and much longer, palm rather oblique, defined by a tooth and palmar 
spines, and having a wide and deep almost semieireular ineision. Peraeo- 
pods 3—5 subequal in length, 24 joint oblong with rounded corners, 4th 
long, not broad. Uropod 3, outer ramus ?/, as long as inner. L. about 
8 mm (mouth-organs and telson not described). 


Arctic Ocean (Greenland). Depth 94 m. 


Gen. Parapleustes Buchh. 


1874 Parapleustes (Sp. un.: P. glacilis), Buchholz in: Zweite D. Nordpolarf., 
v.2 p. 337. | 


1 species. 


P. gracilis Buchh. 1874 P. glacilis, P. gracilis, Buchholz in: Zweite D. Nord- 
polarf., v.2 p. 269, 337 Crust. t.7 f.1 | ?1887 Paramphitho& graecilis, H.J. Hansen in: Vid. 
Meddel., ser.4 v.9 p.124 | 1893 Acanthozone pulchella (part.)?, A. bicuspis, A. Della Valle 
in: F. Fl. Neapel, v.20 p. 605, 942. 


In many respects agreeing elosely with Neopleustes brevicornis (p.313). Mandible 
with no molar tuberele, excluding the species from Gen. Sympleustes (p. 317). 
L. 5 mm. ; 


Arctic Ocean (Sabine Island). Depth 19 m. 


24. Fam. Paramphithoidae 


1871 Subfam. Epimerinae, A. Boeck in: Forh. Selsk. Christian., 1870 p. 183 | 
1888 Epimeridae, T. Stebbing in: Rep. Voy. Challenger, v.29 p.876 | 1893 E., G.O. 
Sars, Crust. Norway, v.1 p. 362. 


Integument indurated, processiferous (Fig. 74, p.327). Side-plates rigid, 
some acute. Eyes, when present, prominent. Antenna l shorter than antenna 2, 
flagellum in both many-jointed, accessory flagellum rudimentary or absent. 
Upper lip not deeply or not ineised. Lower lip, inner lobes coaleseing with 
outer or absent. Mandible, accessory plate on right as well as on left. 
Maxillipeds, outer plates broad, not long, scantily armed on inner margin, 
finger small. Mouth-parts in, general strongly developed. Gnathopods 1 
and 2 (Fig. 75, 76, p. 327) not stout in structure, 5tk and 6tk joints narrow, 
finger small. Peraeopods 3—5, 24 joint not widely expanded. Uropod 3, 
rami lanceolate, longer than peduncle. Telson not large, entire or distally 
insinuate. Sexual difference very slight. 


Marine. Free swimming, rarely semiparasitie. 


3 genera, 8 accepted species and 1 obscure. 


Paramphithoidae, Epimeria 321 
Synopsis of genera: 


GE a re l. Gen. Epimeria . . p.321 
Side-plates 4 and 5 not eombining to form a 


Side-plates 4 and 5 together forming a crescentic 
; 
eurve — 2. 


a ee er OR E 2. Gen. Paramphithoe p. 324 
Gnathopods 1 and 2 (Fig. 75, 76), 5th joint greatly 


Gnathopods 1 and 2, th joint rather shorter 
i | 
one Ban En 3. Gen. Actinacanthus p. 326 


1. Gen. Epimeria A. Costa 


Pi 1793 Subgen. Gammarellus (part.), J. F.W. Herbst, Naturg. Krabben Krebse, v.2 
p. 106 | ?1847 Vertumnus (Sp. un.: V. eranchii) (nom. nud.), (Leach in MS.) A. White, 
Crust. Brit. Mus., p.89 | 1851 Epimeria (Sp. un.: E. trieristata), (A. Costa in:) F.W. 
Hope, Cat. Crost. Ital., p.46 | 1888 E., T. Stebbing in: Rep. Voy. Challenger, v.29 
p. 877 | 1893 -E., G. ©. Sars, Crust. Norway, v.1 p.363. 


Body rather stout, with dorsal projections. Head with acute curved 
@ rostrum, lateral corners weak, post-antennal deflexed, obtuse. Side-plates 1—3 
i strongly tapering, grooved, 4 deep, with large upper emargination and 
larger one below defined by 2 acute points, 5tk produced acutely or sub- 
acutely backward, its lower margin prolonging the arch of side-plate 4, 
6! rather acute at hind corner, 7! rounded. Eyes prominent, not strongly 
developed. Antenna 2 not elongate. Mandible, molar small, normal, palp 
not very large. Maxilla 1, inner plate with many setae. Maxilla 2, inner 
and outer plates broad, short, obliquely truncate, densely fringed, inner shorter, 
not narrower than outer. Maxillipeds, inner and outer plates pretty well 
developed, outer serrulate on inner margin, fringed with spines and setae, 
palp not very large. Gnathopods 1 and 2 similar, subequal, rather small, 
palm of 6tk joint short. Peraeopods 1—5 not robust; in peraeopod 3 
24 joint narrow, in peraeopods 4 and 5 not greatly expanded; peraeopod 5 
a little shorter than peraeopod 4. Uropods 1—3, rami lanceolate, spinu- 
lose, rami of uropod 3 large, equal. Telson rounded quadrangular, apex 
emarginate. 


4 speeies. 


Synopsis of species: 


4 Pleon segment 3, postero-lateral angles strongly 
1 produced, no accessory tooth . . » 2» .... l. E. parasitica . . p.321 
Pleon segment 3, postero-lateral angles weakly 
produced, an accessory tooth above — 2. _ 
9 j The whole peraeon carindte - . . . 2... 7. 2. E. loricata . . . p.322 
\ Only hinder part of peraeon earinate — 3. 
3 { Side-plates 1-5 with aeute apices . . .. . . . 3. E. cornigera . . p.323 
Side-plates 1—5 with obtuse apices . . .... . 4. E. tuberculata . p. 323 


1. E. parasitica (Sars) 1858 Amphitho£ p., M. Sars in: Forh. Selsk. Christian., 
p- 131 | 1861 Acanthosoma p., ?A. tricristata, A. Boeck in: Forh. Skand. Naturf., 
Mode 8 p.665, 666 | 1862 Acanthonotus parasiticus, Bate, Cat. Amphip. Brit. Mus., 
p-375 | 1893 Epimeria parasitica, &. ©. Sars, Crust. Norway, v.1 p.366 t.129 f.1 | 1871 
E. cornigera (err., non Gammarus corniger J. C. Fabrieius 1779)), A. Boeck in: Forh. 


Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 21 


322 Epimeria 


Selsk. Christian., 1870 p.185 | 1888 E.c., T. Stebbing in: Rep. Voy. Challenger, v.29 
p.318 | 1893 Acanthonotosoma cornigerum (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p. 676. 


Dorsal carina from peraeon segment 5 to pleon segment 4, the denti- 
form projection encreasing in strength on successive segments, subdorsal 
carinae ending in a small tooth on each side of the segments. Head, rostrum 
reaching slightly beyond 1° joint of antenna 1, post-antennal corners 
subacute. Pleon segments 1 and 2, postero-lateral corners with 2 projecting 
angular points, segment 3, postero-lateral corners acute, strongly produced, 
without upper projecting point. Eyes rather large, piriform, brilliant carmine. 
Antenna 1 not very long, 1° joint longer than 24 and 3% combined, flagellum 
about twice as long as peduncle, 20-jointed. Antenna 2 not much longer, 
ultimate and penultimate joints of pedunele subequal, flagellum twice as 
long as peduncle. Gnathopods 1 and 2, 5t% joint as long as 6", 6th slightly 
widening to not very oblique palm. Peraeopod 5, 24 joint as long as 31 —6tk 
combined, widened except at distal end, which is produced to small acute 
lobe. Uropod 3, rami long, not very broad, spinules few. Telson oblong 
oval, apical margin insinuate, not deeply. Colour dark red, especially at 
hind margin of segments. L. Q about 9 mm. 


North-Atlantic, North-Sea and Skagerrak (South- and West-Norway). Semi- 
parasitic on Holothuria tremula Gunn. 


2. E.loricata O.Sars 1872 E.coniger (nom. nud.), Whiteaves in: Ann. nat. 
Hist., ser. 4 v.10 p.347 | 1874 E. cornigera (err., non Gammarus corniger J.C. Fabrieius 
1779!), Whiteaves in: Amer. J. Sei., ser.3 0.7 p.213 | 1893 Acanthonotosoma cornigerum 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p.676 | 1879 Epimeria loricata, G.O. 
Sars in: Arch. Naturv. Kristian., v.4 p.450 | 1885 E.l., @.O.Sars in: Norske Nordhavs- 
Exp., ©.6 Crust. I p.166 t.14 f.2 | 1888 E.1., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.878 t.68 | 1893 E.l., G. O. Sars, Crust. Norway, v.1 p.368 t.129 f.3 | 1883 
E. conspicua, T. Stebbing in: Ann. nat. Hist., ser.5 v.11 p. 204. 


Much indurated, carinate from peraeon segment 1 to pleon segment 4, 
laminar, obtuse, backward produced processes, encreasing in size successively 
to pleon segment 1, on 24—4th more acute, on 4tk diminished in size; 
peraeon segments 1—7 with subdorsal lateral tuberele, pleon segments 1—3 
with 4 lateral tubereles, 4t{h with one and a ridge, 5tk and 6tk centrally faintly 
carinate. Head not carinate, rostrum very long, acute, reaching end of 
peduncle of antenna 1. Pleon segments 1—3, postero-lateral angles acute, 
with another tooth above the produced point, pleon segment 2 with tooth 
at antero-lateral corner. Eyes very prominent, rounded or oval, rich 
vermilion. Antenna 1, 1° joint longer than 24 and 34 combined, flagellum 
nearly thrice as long as peduncle, with about 30 joints, 1° Jongest, accessory 
flagellum 1-jointed, almost rudimentary. Antenna 2 not much longer, ulti- 
mate joint of peduncle shorter than penultimate, flagellum with 50 joints 
or more, 1° Jongest. Upper lip faintly insinuate at narrowed apex. Maxilla 1, 
inner plate with 9 setae, outer with 11 spines. Gmnathopods 1 and 2 stronger 
than in other species of the genus. Gmathopod 1, 5tk joint nearly as long 
as 6, twice as long as broad, 6tk oblong, a little widened at the short, 
serrate, almost transverse palm, finger armed on inner margin with 12 spines. 
Gnathopod 2 like gnathopod 1, but 6! joint longer. Peraeopods 3 and 4, 
24 joint deeply grooved behind; peraeopod 5, 24 joint not equal in length to 
34 —6th combined, expanded above, produced into a narrow lobe below. Uropod3, 
rami long, broad, ending very acutely. Telson little longer than broad, 


Epimeria 323 


triangularly ineised but not deeply between 2 triangular apices. Colour 
magnificent coral-red, more vivid on hind margin of segments. L. reaching 
40 mm. 


Aretie Ocean and North-Atlantie (Greenland; Spitzbergen; North-America; Hasvig 
[West-Finmark], depth 150—282 m). 


3. E. cornigera (F.) 1779 Gammarus corniger, J. C. Fabrieius, Reise Norweg., 
p-383 | 1788 Cancer (@.) e., J. F. Gmelin, Syst. Nat., 0.5 p.2992 | 1793 ©. (Gamma- 
rellus) c., J. F.W. Herbst, Naturg. Krabben Krebse, v.2 p.141 | 1871 Epimeria cornigera, 
A.Boeck in; Forh. Selsk. Christian., 1870 p.185 | 1893 E.c., G. O. Sars, Crust. Norway, 
v.1 p.364 t.128 | 1893 Acanthonotosoma cornigerum (part.), A. Della Valle in: F. Fl. 
"Neapel, v.20 p. 676 t.59 £.85 | ?1847 Vertumnus cranchii (nom. nud.), (Leach in 
MS.) A. White, Crust. Brit. Mus., p.89 | ?1850 Acanthonotus testudo, A. White 
in: P. zool. Soe. London, v.18 p.97 t.16 | 1851 Epimeria trieristata, (A. Costa in:) 
F. W, Hope, Cat. Crost. Ital., p.46 | 1857 Acanthonotus owenit, Bate in: Ann. nat. Hist., 
ser.2 v.19 p.141. 


Front part broadly arched, back carinate from peraeon segment 5 to 
pleon segment 4, the keel forming in each segment an acute backward 
directed tooth, in pleon segment 4 the back indented in front of the tooth. 
There is also a similar but much slighter subdorsal keel on either side 
from peraeon segment 6 to pleon segment 3. Rostrum reaching beyond 
1° joint ofantennal. Side-plates 1—5 with acute apices. Pleon segments 1—3 
each having two rather distant teeth at postero-lateral corners. Eyes very 
prominent, rounded, bright carmine. Antenna 1, 1° joint longer than 24 and 
34 combined, flagellum about thrice as long as peduncle, 40-jointed, accessory 
flagellum 1-jointed, almost rudimentary. Antenna 2 not much longer, ulti- 
mate and penultimate joints of peduncle subequal, flagellum about twice 
as long as peduncle. Gnathopods 1 and 2 rather feeble, 5t% joint longer 
than 6%, palm small, joining hind margin by a rounded angle. Peraeo- 
pods 1—5, uropods 1—3 and telson nearly as in E. loricata, but telson scarcely 
at all longer than broad. Colour whitish with reddish tinge, hind rim 
of each segment and tips of 4 and 5th side-plates pink. L. reaching 
16 mm. 

North-Atlantie and North-Sea (West-Norway at least up to Trondhjemsfjord, 
depth 94—282 m; France; Great Britain); Mediterranean. 


4. E. tuberculata O.Sars 1893 E.t., G. O. Sers, Crust. Norway, v.1 p. 367 
t. 129 £.2. 


Front part broadly arched, carina from peraeon segment 6 to pleon 
segment 4 with rather blunt projeetions, subdorsal keels very slight without 
dentiform projections, pleon segment 4 with a lateral ridge. Rostrum little 
overlapping 1° joint of antenna 1. Side-plates 1—3 and 5 with blunt 
apices, 4 Jess produced and less distinctly faleiform than in other species. 
Pleon segments 1—3 with 2 distant, not very sharp, teeth at postero-lateral 
corners. Eyes rounded, light carmine. Antenna 1 short, 1° joint much 
longer than 24 and 34 combined, flagellum about twice as long as peduncle, 
24-jointed. Antenna 2 considerably longer, ultimate joint of peduncle shorter 
than penultimate, flagellum 2%/, times as long as peduncle. Gnathopods 1 
and 2, 5tk joint considerably longer than 6%, which is narrow, scarcely 
widening distally,. Peraeopod 5, 24 joint not nearly as long as remainder 
of leg, ending in a blunt lobe. Uropod 3 as in E. cornigera. Telson 
rather broad, scarcely longer than breadth at base, slightly emarginate 
between 2 blunt apices. Colour whitish with faint rosy tinge (Sars), clear 


21* 


a ee Fr En ee nr an) ER a 
2 Be Ne 5 N er 
eh ee 


324 Epimeria, Paramphithoe 


white variegated by a peculiar, very pretty shade of chocolate brown (T. Seott, 
MS.). L. reaching 16 mm. 


North-Atlantic and North-Sea (West-Norway, depth 282—376 m; Ailsa Craig in 
Firth of Clyde). 


2. Gen. Paramphithoe Bruz. 


1835 Acanthosoma (Sp. un.: A. hystrix) (non J. Curtis 1824, Hemiptera!), (Rich. 
Owen in MS.) J. ©. Ross in: John Ross, App. sec. Voy., nat. Hist. p.91 | 1859 Param- 
phithoe (part.), R. M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 nr.1 p.68 | 1871 
Acanthozone (Sp. un.: A. cuspidata), A. Boeck in: Forh. Selsk. Christian., 1870 p. 184 | 
1893 A., G. O. Sars, Crust. Norway, ®.1 p. 369 | 1893 A. (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p.599 | 1894 A., T. Stebbing in: Bijdr. Dierk., v. 17 p. 29. 


Body indurated, beset with acute processes. Head, rostrum very small, 
post-antennal corners spiniform. Side-plates 1—3, 6 and 7 forming one 
acute lobe, 4 and 5tl with 2 acute lobes. Eyes prominent. Antenna 2 
elongate. Upper lip apically narrow, slightly insinuate, symmetrical. Lower | 
lip with well formed inner plates coalescent on their outer margins with the 
outer plates. Mandible powerful, all parts normal, eutting plates bluntly 
dentate, spine-row of about 15 slender spines, 34 joint of palp shorter than 2. 
Maxilla 1 with about 10 setae on inner plate, 11 spines on outer. Maxilla 2, 
inner plate fringed along much of inner margin, rather shorter and narrower 
than outer. Maxillipeds, inner and outer plates rather broad, outer closely 
fringed with spines on apical margin, 29 joint of palp much the longest, 
finger small. Gnathopods 1 and 2 rather feeble, narrow, 5% joint shorter 
than 6b, finger small. Peraeopods 3—5, 24 joint with acute processes on 
hind margin. Uropod 2, rami unequal, shorter than in uropods 1 and 3; 
uropod 3, rami long, lanceolate. Telson rather elongate and boat-shaped. 


3 accepted species, 1 doubtful. 


Synopsis of accepted species: 


1 I Bosträm elongatle 2; De ee ae 1. P. buchholzi .. . . p. 324 
Rostrum short — 2. 

Peraeon segments 1—4 with elevated tooth on . 
| hiad magih. 2. eier are 2. P.hystrix. . : . p.325 
. | Peraeon segments 1—4 without elevated tooth on 

KEN EIER N a a er 3. P. polyacantha . p.325 


1. P. buchholzi (Stebb.) 1874 Acanthozone hystrix (err., non Acanthosoma h. 
J.C. Ross 1835!), Buchholz in: Zweite D. Nordpolarf., v.2 p. 362 Crust. t. 11 | 1888 
A. buchholzi, T. Stebbing in: Rep. Voy. Challenger, 0.29 p. 162, 467 | 1894 4A. b., 
T. Stebbing in: Bijdr. Dierk., «. 17 p.31 | 1893 A. euspidata (part.), A. Della Valle in: 
F. Fl. Neapel, v. 20 p. 613. 


Peraeon segment 1 with 7 acute processes in front, the medio-dorsal 
largest, pointing upward and forward, and 5 on hind margin; segments 2—7 
with 5 processes of hind margin. those on segments 5—7 pointing backward, 
the middle one with a subsidiary tooth near the top. Pleon segments 1—3 
with a similar eentral process, and on either side of it in segment 1 with 4 
sharp processes on the hind margin, in segment 2 with 6, in segment 3 with 3; 
segment 4 has a central lobe not acutely produced and at the postero- 
lateral corners a sharp process, which is repeated on segment 5. Head, 
rostrum straight, pointing slightly upward, overlapping 1° joint of antenna 1, 


Paramphithoe 325 


lateral and post-antennal anglies alike sharply outdrawn. Side-plates 1 
and 3 apically serrate in 4 teeth, plates 2, 5 and 7 each with 2 denticles, 
4th and 5tb irregularly sculptured below. Eyes round. Maxilla 2, inner plate 
rather broader than outer(?). Gnathopods 1 and 2 feeble, subequal. Peraeo- 
pods 3—5, 24 joint with 3 acute processes of the hind margin in peraeo- 
pod 3, with 4 in peraeopods 4 and 5. Telson longer than breadth at base, 
tapering, with a triangular emargination between 2 triangular apices. Colour 
uniformly pale reddish yellow. L. 22:5 mm (29 antenna 23 mm long). 


Arectie Ocean (Greenland). Depth 56 m. 


2. P. hystrix (J.C. Ross) 1835 Acanthosoma h., (Rich. Owen in MS.) J. C. 
Ross in: John Ross, App. sec. Voy., nat. Hist. p.91 t.» f.4—7 | 1838 Amphithoe h., 
Kröyer in: Danske Selsk. Afh.. ©. 7 p. 259 t.2 f.7 | 1859 Paramphithoe h., R. M. 
Bruzelius in: Svenska Ak. Handl., n. ser. 0.3 nr. 1 p.71 | 1877 Acanthozone h., Miers 
in: Ann. nat. Hist., ser. 4 v. 19 p.136; v.20 p.100 | 1888 A.h., T. Stebbing in: Rep. 
Voy. Challenger, v.29 p.50, 318, 466 | 1894 4A. h., T. Stebbing in: Bijdr. Dierk., v.17 
p-29 | 1871 A. cuspidata (err.?, non Oniscus cuspidatus Lepechin 1780!), A. Boeck in: 
Forh. Selsk. Christian., 1870 p.184 | 1876 A.c., A. Boeck, Skand. Arkt. Amphip., v.2 
p.229 t.20 f.3 1893 A.c., G. O.Sars, Crust. Norway, v©.1l p.370 t.130 | 1893 4. ce. 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p.613 t.59 f. 25. 


Body nearly eylindrie. Peraeon segment 1 with large laminar carinate 
process completely overarching the head, a smaller subdorsal process on either 
side, segments I—7 with 5 processes from transverse ridge of hind margin 
as in A. buchholzi. Pleon segments 1—3 with similar central process, and 
on either side of it in segments 1 and 2, 4 sharp processes, the 2 upper 
much larger than the 2 lower, in segment 3 two on each side which are 
subequal, segment 4 with sharp median and postero-lateral processes, segments 5 
and 6 with acute process at postero-lateral angles but no dorsal process. Head, 
rostrum very small, horizontal, lateral corners forming a subtruncate lobe, 
post-antennal corners sharply outdrawn. Side-plates 1—3 acutely produced 
at apex, not serrate, 4 with 2 acute processes pointing downward, 5tR 
with 2 pointing backward, 6!" and 7 with 1 acute process. Eyes prominent, 
rounded, dark brown (Sars) or white (Bate). Antenna 1, 1° joint as long as 
24 and 34 combined, with large apical process, flagellum about 3 times as 
long as peduncle. Antenna 2 much longer, joints of pedunele produced to 
dentiform projections, ultimate and penultimate joints of peduncle subequal, 
flagellum nearly 4 times as long as peduncle. Gnathopods 1 and 2 subequal, 
5th joint slightly shorter than 6%, 6" widening a little distally, palm nearly 
transverse, finger small. Peraeopods 3—5, 24 joint with only 2 acute processes 
of hind margin. Telson as long as once and a half breadth at base, tapering, 
slightly (more than in figure by Sars 1893) emarginate. Colour light straw- 
yellow, mottled with brown. L. reaching over 30 mm. 

Aretice Ocean, widely distributed; North- Atlantic (North- America; Norway, 
Trondhjemsfjord and northward). 


3. P. polyacantha (J. Murdoch) 1885 Acanthozone p., J. Murdoch in: P. U. S. 
Mus., v.7 p. 520 | 1893 A. cuspidata (part.)?, A. Della Valle in: F. Fl. Neapel, v. 20 p. 613. 


Peraeon segment 1, anterior margin raised into a ridge eurving for- 
ward over the head, segments 1—5, hind margin raised into a rounded 
ridge, developing into a median tooth on segment 5. Peraeon. segments 6 
and 7 and pleon segments 1—4 having on hind margin broad median tooth 
pointing backward, largest on pleon segment 3, nearly obsolete on segment 4, 


326 Paramphithoe, Actinacanthus 


and postero-lateral angles produced acutely backward; peraeon segments 6 
and 7 and pleon segments 1 and 2 with small intermediate tooth on each 
side, peraeon segments 1—5 with lateral margin deeply carinate. Head, 
rostrum very short, sharp, post-antennal corners spiniform. Side-plates 
with spiniform process. Pleon segment 2, postero-lateral corners bidentate. 
Eyes round, prominent. Antenna 1 about °/, as long as antenna 2. Gnatho- 
pods 1 and 2 slender, subchelate. Telson rather long, entire. 


Aretie Ocean (Point Franklin [aretie Alaska]). Depth 24 m. 


P. euspidata (Lepech.) 1780 Oniscus cuspidatus, Lepechin in: Acta Ac. Petrop., 
1778 v.1t.8 £.3 | 1877 Acanthozone cuspidata, Miers in: Ann. nat. Hist., ser. 4 ©.19 
p. 136; v.20 p.100 | 1888 A. c., T. Stebbing in: Rep. Voy. Challenger, v.29 p.49 (with 
copy of Lepechin’s fig.). ? 

Perhaps identical with P. hystrix (p.825). L. 20 mm. 

White Sea. 


3. Gen. Actinacanthus Stebb.*) 


1888 Acanthechinus (Sp. un.: A. tricarinatus) (non P. M. Duncan & P. Sladen 
1882, Echinodermata!), T. Stebbing in: Rep. Voy. Challenger, v.29. p. 883. 


Body indurated, beset with acute processes (Fig. 74). Head, rostrum very 
small. Side-plates 1—4 acute, 31 — 7! furnished with acute backward pointing 
lobes. Antennae 1 and 2, some joints of peduncle with acute projeetions. 
Upper lip apically broad, rather unsymmetrically bilobed. Mandible, spine- 
row abnormal, molar very prominent, palp elongate. Maxilla 1, inner plate 
with 3 setae, outer with 7 spines, palp long. Maxilla 2, plates broad, outer 
the broader. Maxillipeds, inner plates well developed, outer rather broad, 
reaching a little beyond 1°t joint of palp, thinly furnished with setae, 1° joint 
of palp rather longer than 24, finger slight, short. Gmathopods 1 and 2 
(Fig. 75, 76) very long and thin, 5" joint much longer than subchelate 6'h, 
finger very small. Peraeopods 3—5, 24 joint channelled, others deeurrent. 
Uropod 3, rami long, lanceolate. Telson short, entire. Branchial vesieles 
simple. Marsupial plates long, narrow. 


l species. 


1. A. tricarinatus (Stebb.) 1883 Acanthozone tricarinata, T. Stebbing in: 
Ann. nat. Hist., ser.5 v.11 p.205 |! 1893 A.t., A. DellaValle in: F. Fl. Neapel, v.20 
p.601 1.59 f,11 | 1888 Acanthechinus tricarinatus, T. Stebbing in: Rep. Voy. Challenger, 
v.29 p. 884 t. 69, 70. 


Body eylindric, except hinder part of pleon which is a little depressed 
and strongly flexed. Peraeon segments 1—7 (Fig. 74) each with central and 2 
lateral acute, 3-sided, serrate, processes connected by transverse ridge on hinder 
part of segment; central process on segment 1 bifureate, one arm pointing 
forward, the other backward. Pleon segments 1 and 2 with large central 
process flanked by 2 tubercles on each side, 39 with smaller central process 
and 1 tuberele, and having a tridentate process rising from hind margin; 
4'h with hump, depression, and 2 serrate processes in succession; 5! unarmed; 
6" with central and 2 lateral . processes. Side-plates 1 and 2 pointing 
forward, tapering, carinate, serrate; 34 and 4 with both lobes acute, pointing 
backward; 7! with the largest lobe. Eyes not perceived. Antenna 1, 1° joint 


*) Nom. nov. AKtic, ray, üxavbo, spine. — The name Acanthechinus is preoceupied 
(1882, P.M. Duncan & W. P. Sladen in: Pal. Ind., ser. 14 p. 34). 


Actinacanthus, Atylidae 327 


‚distally dilated, produced into 3 long processes, 24 joint subequal to 1, 
‚produced into 2 long processes, 32 joint short, flagellum with 1° joint long, 


longer than shaft of 18 or 24 joint ofpeduncle. Antenna2 with 2 large processes 
on basal joint, with 1 long and 2 short on antepenultimate, 2 long and 2 short 
on penultimate, 2 very small on ultimate joint, which is longer than shaft 
of penultimate, flagellum rather longer than pedunele, with about 12 joints, 
1° very long. Mandible, spines of spine-row extremely unequal, 1° joint 
of palp with tooth-like process, which seems to be movable, 34 joint rather 
longer than 24, spinose. Gmathopod 1 (Fig. 75), 29 joint the thickest part 
of the limb, 5tk joint stouter and much longer than 6%, which 

is about 5 times as long as its greatest breadth, tapering to 

minute obligue spinose palm, finger very small, with tooth and 


5 joint ---L- 


Fig. 75. Fig. 76. 
Fig. 74. Section through peraeon segment 3. . Gnathopod 1. Gnathopod 2. 


Fig. 74—76. A. tricarinatus. 


slender nail overlapping palm. Gmathopod 2 (Fig. 76) rather ‘similar to 
gnathopod 1, but much longer, 5t% joint not thicker than 6 but 3 times 
as long, 6! of uniform widtb, otherwise nearly as in gnathopod 1, palm 
less spinose. Peraeopods 1—5 with finger short, broad, spinulose. Peraeo- 
pods 3—5, 2@ joint with 4 longitudinal ridges, below overlapping 34 joint with 
rounded lobe, 3I—6th joints carinate in front, 4! and 5t" sharply deeurrent. 
Peraeopod 5 rather longer than peraeopod 4. Uropods 1—3, peduncle 
channelled above, rami equal, lanceolate, in uropod 1 rather shorter than 
peduncle, in uropod 2 a little longer, in uropod 3 much longer. Telson 
rather longer than broad, somewhat boat-shaped, broad distal margin convex. 
L. about 16 mm. 


Southern Indian Ocean (Heard Island). Depth 282 m. 


25. Fam. Atylidae 


1865 Subfam. Atylina (part.), W. Lilljeborg in: N. Acta Soc. Upsal., ser.3 ©.6 
nr.1 p.18 | 1876 Subfam. Atylinae (part.), A. Boeck, Skand. Arkt. Amphip., v.2 p.320| 
1882 Atylidae, G. O. Sars in: Forh. Selsk. Christian., nr. 18 p.26 | 1888 A., T. Stebbing 
in: Rep. Voy. Challenger, v. 29 p. 899. 


Body strongly compressed, carinate. Pleon segments 5 and 6 coalesced. 
Antenna 1, accessory flagellum rudimentary or absent. Upper lip rounded. 


328 Atylidae, Atylus 


Lower lip with inner lobes obsolescent. Mandible (Fig. 77 p. 333) with palp. 
Maxilla 1 (Fig.78 p.333), inner plate with several setae. Maxilla 2, inner plate 
partially fringed on inner margin. Maxillipeds, palp well developed. Gnatho- 
pods 1 and 2 subchelate, gnathopod 2 generally the more slender. Peraeo- 
pods 1—5, finger usually pointing backward. Uropod 3, rami subequal, 
extending beyond those of uropod 2. Telson short, deeply cleft. | 


Marine. 


2 genera, 8 accepted species and 1 obseure. 


Synopsis of genera: 
Mandibular palp strong; pleon segment 4 not. dorsally 


Böbched ER NER En SER 1. Gen. Atylus . . . p.828 
Mandibular palp slight (Fig. 77 p.333); pleon segment 4 
Gorselir ADtchell; 25 2:5, a re 2. (sen. Nototropis . p. 329 


1. Gen. Atylus Leach 


1815 Atylus (Sp. un.: A. carinatus), Leach, Zool. Mise., v.2 p.21 | 1815 A., 
Leach in: Tr. Linn. Soc. London, v.11 p. 857 | 1888 A., T. Stebbing in: Rep. wog: 
Challenger. v.29 p. 907 | 1898 A., G. O. Sars, Crust. Norway, v.1p.471 | 1893 A. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 697. 


Body strongly compressed, carinate. Pleon segment 4 dorsally produced, 
but without antecedent notch. Side-plates not deep. Antennae 1 and 2 
subequal, not very slender, accessory flagellum rudimentary. Mandible 
normal, palp large, 39 joint long and spinose. Maxilla 2, outer plate wider 
and longer than inner. Maxillipeds rather large, outer plates not reaching 
end of palp’s 24 joint, palp rather strong. Gmathopods 1 and 2 short but 
strong, with broad 6!" joint. Peraeopods 1—5 rather short, peraeopod 5 
with 24 joint much dilated, finger reversed. Branchial vesicles simple. 
Uropod 3, rami long, nearly equal, not reaching beyond uropod 1. Telson 
deeply cleft. 


l speeies. 


l. A. carinatus (F.) 1793 Gammarus c., J. C. Fabrieius, Ent. syst., v.2 p.515 | 
1815 Atylus e., Leach, Zool. Misc., v.2 p.22 t.69 | 1874 A. c., Buchholz in: Zweite D. 
Nordpolarf., v.2 p.357 Crust. t.10 | 1876 A.c., A. Boeck, Skand. Arkt. Amphip., v. 2 
p. 324 | 1893 A. ce., G. ©. Sars, Crust. Norway, v.1 p.471t.166 f.1 | 1893 A. c., A. Della 
Valle in: F. Fl. Neapel, v.20 p.701 t.60 f.5 | 1838 Amphithoe carinata, Kröyer in: 
Danske Selsk. Afh., ©.7 p.256 t.2 f.6a—k | 1838 A. c., Kröyer in: Naturh. Tidsskr., 
v.2 p.259 | 1866 Paramphithoö c., Goes in: Ößr. Ak. Förh,, v.22 p.523. 


Body elongate, carinate throughout, the keel produced into a tooth in 
peraeon segment 7 and pleon segments 1—4. Head, rostrum rather large, 
compressed, distally somewhat expanded, ending obtusely; lateral corners 
subtruncate. Side-plates 1—4 almost quadrangular, 4% broader, scarcely 
deeper than the preceding, little emarginate, 5!" with front lobe the deeper. 
Pleon segment 3, postero-lateral corners subquadrate. Eyes very small, 
rounded oval, prominent, very dark. Antenna 1 not nearly !/;, as long as 
body, 1° joint as long as 24, 34 about half 24, flagellum scarcely longer 
than pedunele, 22-jointed, accessory flagellum 1-jointed, very small. Antenna 2 
not (Boeck: a little) longer, ultimate and penultimate joints of peduncle sub- 
equal, together longer than the 20-jointed flagellum. Gnathopod 1, 5th joint 
not very long, but nearly as long as 6th, 6th rounded oval, front margin 
densely setose, palm shorter than hind margin, with which it forms an 


Atylus, Nototropis 329 


obtuse angle, finger rather short and stout. Gmathopod 2 similar, rather 
longer. Peraeopod 1 longer than peraeopod 2, 4% joint in both rather stout.. 
Peraeopods 3 and 4, 24 joint not very wide, narrowing distally. Peraeopod 5, 
24 joint broader than long, hind lobe produced, defined by a notch in front, 
finger short and stout as in peraeopods 3 and 4, in all 3 easily reversed. 
Uropod 2 much shorter than uropods 1 and 3, the outer ramus a little 
shorter (Boeck: a little longer) than the inner. Uropod 3, peduncle very 
short, rami long, fringed with slender setae. Telson oval triangular, small, 
longer than broad, cleft nearly to base, tapering to obtuse apices, each 
carrying a spinule. Colour whitish with red spots? L. 32—43 mm. 

Arctic Ocean (widely distributed; north of Norway, in stomach of Liparis 
montagui Donov.). 


2. Gen. Nototropis A. Costa 


1853 Nototropis, Notrotopis (Sp. un.: N. spinulicauda), A. Costa in: Rend. Soe. 
Borbon., n. ser. v.2 p.170, 173 | 1859 Paramphithoe (part.), R. M. Bruzelius in: Svenska 
Ak. Handl., n. ser. v.3 nr.1 p.68 | 1861 Epidesura (Sp. typ.: Amphitho& compressa), 
A. Boeck in: Forh. Skand. Naturf., Mode 8 p.659 | 1893 Paratylus, G.O. Bars, Crust. 
Norway, v.1 p. 462. 

Body strongly ecompressed, carinate. Pleon segment 4 dorsally produced 
with antecedent notch. Head rostrate, lateral margins sinuous. Side-plates 1—4 
of moderate size, generally smaller in JS than in ©, 5tt with front lobe 
the deeper. Antenna 1 the shorter, without accessory flagellum, both pairs 
elongate in d. Mandible (Fig. 77 p. 333) normal, palp slender, feebly armed. 


‚Maxilla 1 see fig. 78 (p. 333), maxilla-2 as in Atylus. Maxillipeds, outer plates 


fully reaching or passing end of palp’s 24 joint, palp slender. Gnathopod 1 
rather stouter and shorter than gnathopod 2, 6! joint oval, densely spinose 
in front; 5t" joint in both pairs elongate triangular, palm oblique. Peraeopod 1 
longer than peraeopod 2, peraeopod 3 short, with 24 joint piriform, peraeo- 
pods 4 and 5 longer, subequal, 24 joint in peraeopad 5 widely expanded, 
finger in peraeopods 3—5 sometimes reversed. Branchial vesieles often 
pleated. Uropods 1 and 2, outer ramus the shorter. Uropod 3, rami sub- 
equal, lanceolate, spinulose. Telson short, deeply cleft, apices subtruncate. 


7 species accepted, 1 obscure. 


Synopsis of accepted species: 

1 | Peraeopod 1, finger very large... ... . 1. N.falcatus . .. . . p- 330 

Peraeopod 1, finger not very large — 2. 
o H Pleon segments 1—3 without dorsal teeth. . 2. N. swammerdamei . p.330 

Pleon segments 1—3 with dorsal teeth — 3. 

Peraeopod 5, 2d joint with lower hind corner 

triangularly produced — 4. 
Paraeopod 5, 24 joint with lower hind corner - 
not triangularly produced — 6. 
Branchial vesicles simple. . . ....... 8. N. vedlomensis . . . p.331 
Branchial vesicles not simple — 5. 


| 

Eyes large, reniform; a spinulose hump on 
: | 
| 


4 


eomposite segment of pleon. . ..... 4. N. guttatus. . . . - p. 331 
Eyes small, round; no spinulose hump on 

ceomposite segment of pleon . ..... 5. N. nordlandieus. . . p. 332 
Post-antennal -corners not produced; uro- 

p6d 8, rami very long 2... ..... 8, smiti. ..... p. 332 
Post-antennal corners produced; uropod 3, 

es 7. N.homochir . . . . p.333. 


330 Nototropis 


1. N. faleatus (Metzg.) 1871 Atylus f., Aug. Metzger in: JJahresber. Ges. 
Hannover, v.21 p.28 | 1889 A. f, Hoek in: Tijdschr. Nederl. dierk. Ver., ser. 2 o.2 
p.195 t.8 f.2,21| 1893 A. f., A. Della Valle in: F. Fl. Neapel, v.20 p.703 | 1888 A. f., 
Tritaeta?, T. Stebbing in: Rep. Voy. Challenger, v.29 p.408 | 1882 A. uneinatus, G.O. 
Sars in: Forh. Selsk. Christian., nr. 18 p.101 t.5 f.3, 3a | 1893 & 95 Paratylus falcatus, 
P.u., 6. O. Sars, Crust. Norway, v.1 p.465 t. 164 f.1; p.697 | 1895 P.f. + P.u., 
A. 0. Walker in: P. Liverp. biol. Soe., v.9 p. 306. 


Resembles N. swammerdamei except in the following points. Pleon 
segments 1—3 produced (not so in Alylus uneinatus O. Sars) to a small dorsal 
tooth. Side-plate 1 tapering distally, 4% little broader than 39. Antennalino 
scarcely '/, as long as body, flagellum little longer than peduncle. Antenna 2 
much longer, ultimate joint of pedunele not nearly twice as long as pen- 
ultimate, flagellum not as long as both combined. Gnathopod 1 less strongly 
built. Gnathopod 2, 6tk joint narrowly oblong, palm very oblique, subequal to 
hind margin. Peraeopod 1 strong, 5t joint very short, cup-shaped, 6! eurved, 
with strong spines at base, finger huge, falciform, fitted for elasping. Peraeo- 
pod 2 very small, 5th—7th joints almost rudimentary. Peraeopods 3—5, 5th 
‚joint much longer than 6%, finger reversed, 24 joint in peraeopod 5 broader 
and with more convex hind margin than in the other species. Colour rather 
pellueid, with scattered brownish patches (Sars) or white with a red spot on the 
back of each segment except pleon segment 4 (Walker). L. 9 5—7 mm. 


Arctie Ocean, North-Atlantic and North-Sea (Norway, East Frisian coast, Holland, 
France, North-West England, Wales). 


2. N. swammerdamei (M.-E.) 1830 Amphithoe s., H. Milne Edwards in: Ann. 
Sei. nat., v.20 p.378 | 1840 Amphitoe svammerdamii, H. Milne Edwards, Hist. nat. Crust., 
v.3 p.35 | 1876 Atylus s., A. schwammerdamüi, A. Boeck, Skand. Arkt. Amphip., ®.2 
p.328 t.21 f.5; 1.22 £.1 | 1879 A. swammerdammii, Hoek in: Tijdschr. Nederl. dierk. 
Ver., v.4 p. 134, 152 t.10 £. 1—6 | 1893 A. swammerdamiäi (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p.698 t.3 £.12; t.17 f.1-—-21 | 1893 Paratylus swammerdami, 
&. O. Sars, Crust. Norway, v.1 p. 463 “ 163 | 1895 P. swammerdamii, A. O. Walker in: 
P. Liverp. biol. Soc., v.9 p.805 | 1852 Amphitho& compre8sa, W. Liljeborg in: Öfv. Ak. 
Förh., v.9 p.8 | 1859 Paramphithoe e., R. M. Bruzelius in: Svenska Ak. Handl., n. ser, 
v.3 nr.1 p.72 | 1861 Amphithoe c., Epidesura sp. typ., A. Boeck in: Forh. Skand. 
Naturf., Mode 8 p.659 | 1857 Dexamine gordoniana, Bate in: Ann. nat. Hist., ser. 2 
v.19 p.142 | 1862 D. loughrini + Atylus swammerdamit + A. compressus, Bate, Cat. 
Amphip. Brit. Mus., p.182 t.24 f.3; p.136 t.26 f.2; p. 142. 


None of the segments produced to a dorsal tooth except 4 of pleon, 
the following composite segment ending in a little spinulose hump. Head, 
rostrum rather short, lateral margin bilobate, lobes rounded, post-antennal 
corners not produced. Side-plates I—4 much larger and deeper in O than 
in d, 1° not tapering, 4 slightly emarginate, front lobe of 5t" rounded. 
Pleon segment 3, postero-lateral eorners quadrate, with small acutely produced 
point. Eyes oblong reniform, larger in C than in ©, dark brown with 
whitish coating. Antenna 1 in Q more than '/, length of body, 1° joint 
as long as 24 and 3% combined, flagellum not quite twice as long as 
peduncle, about 24-jointed. Antenna 2 in © little longer, ultimate joint of 
peduncle nearly twice as long as penultimate, flagellum about equal to both 
combined. Antennae 1 and 2 in G much longer, with fascieles of setules 
on confronting edges of peduncles. Gnathopod 1, 5t" joint shorter than 
the 6‘%, which is rather stout, ovate, front margin with many series of 
spinules; palm very oblique, not strongly defined. Gnathopod 2 longer, more 
slender, 5!" joint nearly as long as 6%", which is narrow, with short, moderately 


Nototropis 331 


definite palm. Peraeopods 1—5, 5tt joint shorter than 6th, finger small. 
Peraeopods 3-5, 24 joint with subacutely produced lower hind corner 
(production very slight in peraeopod 4), finger reversed; in peraeopods 3 
and 4 front margin of 24 joint setose, in peraeopod 5 24 joint broadly 
oval. Uropod 3, rami more than twice as long as peduncle. Telson rather 
longer than broad, cleft nearly to base, apices truncate, each with a spinule. 
Colour pellueid, whitish, with small patches of chestnut-brown. L. 08mm, d 
rather less (Sars), adult S and © 4—9'5 mm (Walker). 


Aretie Ocean, North-Atlantie and Mediterranean (Europe from Vadsö [Finmark] 
round to Naples, also at the Azores). From between tide-marks to 37 m. 


3. N. vedlomensis (Bate & Westw.) 1862 Dexamine v., Bate & Westwood, 
Brit. sess. Crust., v.1 p.242 f. | 1871 Atylus v., A. Boeck in: Forh. Selsk. Christian., 1870 
p.192 | 1876 A. v., A. Boeck, Skand. Arkt. Amphip., v.2 p.330 t.9 £.9; t.11 £.6 | 1893 
Paratylus v., 6. O. Sars, Crust. Norway, v.1 p.466 t.164 f.2 | 1866 Atylus costae, Cam. 
Heller in: Denk. Ak. Wien., v.2611 p.31 | 1893 Dexamine spinosa (part.), A. Della Valle 
in: F. Fl. Neapel, v.20 p. 579. 


Body slender, very distinetly carinate, peraeon segment 7 and pleon 
segments 1—3, as well as the 4", produced to compressed acute dorsal 
teeth, the following composite segment being apparently smooth, though with 
slight dorsal depression. Head, rostrum rather prominent, lateral margin 
bilobate, upper lobe acute, lower rounded, post-antennal corners not 
produced. Side-plates 1 and 2 slightly tapering, 34 and 4!" broader, not 
very unequal. Pleon segment 3, postero-lateral cormers rotundo-quadrate 
with obsolete point. Eyes small, oval, dark. brown with whitish coating 
(Sars; perhaps only applying to ©). Antenna 1 in Q much more than /, 
as long as body, 1° joint thiecker than 24, scarcely as long, produced to a 
denticle varying from obtuse to acute, 34 joint rather small, flagellum rather 
longer than pedunele, about 28-jointed. Antenna 2 in Q longer, ultimate joint 
of peduncle longer than penultimate, flagellum about as long as peduncle. 
In S antennae 1 and 2 attain greater length, 24 joint of peduncle of antenna 1 
and ultimate joint of peduncle of antenna 2 being more elongate than in O. 
(nathopods 1 and 2, peraeopods 1 and 2, uropods 1—3 and telson nearly as in 
N. swammerdamei, but gnathopods 1 and 2 rather more slender. Peraeo- 
pods 3—5, 5th joint much longer than 6%, finger recurved. Peraeopod 3, 
24 joint in Q uncinately produced at lower hind apex. Peraeopod 5, 24 joint 
very broad, lower hind corner rather sharply produced. Branchial vesicles 
not pleated. Colour semipellueid, yellowish, with a row of rounded orange 
spots along the back; sides, antennae, legs streaked and mottled with orange, 
mouth-parts and uropods tinged with dark brown; ova in pouch bluish-green. 
L. 9 8 mm. 

North-Atlantie, North-Sea and Skagerrak (South--and West-Norway, depth 
19—94 m; Shetland Islands and southward to France); Kattegat. 


4. N. guttatus (A. Costa) 1851 Acanthonotus g., Amphithonotus? g., (A. Costa in:) 
F.W.Hope, Cat. Crost. Ital., p.46 | 1857 Nototropis g., A. Costa in: Mem. Acc. Napoli, 
v.1 p.194 t.1 £.7 | 1885 Amphitonotus g., J. V. Carus, Prodr. F. Medit., v.1 p.408 | 
21853 Notrotopis spinulicauda, A. Costa in: Rend. Soe. Borbon., n. ser. e.2 p.173 | 
?1857 Nototropis s., A. Costa in: Mem. Ace. Napoli, v.1 p.194 t.1 f.8 | 1893 Dexamine 
spinosa (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.573 | ?1895 Atylus andrusowi, 
Sowinski in: M&m. Soe. Kiew, ©. 14 t.4 f. 7—14. 


In general appearance strikingly in agreement with N. vedlomensis, 
but clearly distinet. The composite pleon segment ends in a well marked 


en NT EEE a ee a BE ER Ds 
a y en er 


332 Nototropis 


little spinulose hump. Rostrum rather long, with rounded end. Eyes reni- 
form, of moderate size in Q, very large in S, almost meeting at the top 
of the head. In peraeopod 3 the lower hind corner much less distinctly 
uneinate than in N. vedlomensis (p. 331); in peraeopod 5 the 24 joint not 
very broad, with the produced point not acute. Branchial vesicles of peraeo- 
pod 5 and to some extent those of peraeopod 4 simple, but those of gnathopod 2 
and peraeopods 1—3 remarkably developed; their numerous distinet lobes 
approaching to the phyllobranchiate structure. Colour reddish white or 
yellowish, with 3 longitudinal series of milky. white spots on each side, 
and with various little broken snuff-coloured lines. L. about 10 mm. 


Mediterranean; Bay of Biscay (Vicero [North of Spain]); Black Sea? 


5. N. nordlandicus (Boeck) 1871 Atylus n., A. Boeck in: Forh. Selsk. Christian., 
1870 p.193 | 1876 A.n., A. Boeck, Skand. Arkt. Amphip., v.2 p.332 t.23 f.2 | 1893 
Paratylus n., &. O. Sars, Crust. Norway, ©.1 p.469 t.165 f.2 | 1893 Atylus suammer- 
damii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 698. 


Body as in N. vedlomensis (p.331), but with peraeon segment 6 also toothed; 
head also similar, but rostrum more prolonged, reaching beyond middle of 
1% joint of antenna 1, nearly horizontal. Side-plates 1—4 rather deep, 1% and 
24 rather narrow, distal margin serrate and setose, 34 and 4% distally rounded, 
serrate, 4!" not emarginate, 5!" with front lobe narrowly rounded. Pleon 
segment 3, postero-lateral corners subquadrate, with small produced point 
and margin above slightly crenulate. Eyes very small, rounded, red. 
Antenna 1 in © about "/, as long as body, 1% joint a little shorter than 24, 
flagellum little longer than peduncle, 12-jointed. Antenna 2 rather longer, 
ultimate joint of peduncle little longer than penultimate, flagellum as long 
as both combined. Gmathopod 1, 5t" and 6" joints equal, 6!" oblong oval, 
palm ill-defined. Gnathopod 2 much longer, 6% joint shorter than elongate 5th, 
slightly widened distally. Peraeopods 1 and 2, 4% joint as long as 5th and 
6 combined, 5% much shorter than 6%, Peraeopod 3, 24 joint with lower 
hind angle acutely produced, 5t% rather longer than 4 or 6%, Peraeopod 5, 
24 joint very wide, lower hind angle acutely produced. Branchial vesicles 
pleated. Uropod 3, rami nearly 3 times as long as peduncle. Telson 
longer than broad, eleft °/, length, slightly dehiscent, apices obliquely truncate, 
armed with spinules and 2 setules. Colour dark yellowish grey, with row 
of obseure orange spots. L._Q scarcely 8 mm. 


Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (Norway northward to 
Hasvig [West Finmark]). Depth 94—188 m. 


6. N. smitti (Goös) 1866 Paramphitho& s., Goes in: Öfv. Ak. Förh., v.22 p.524 
t.38 f.14 | 1871 Atylus s., A. Boeck in: Forh. Selsk. Christian., 1870 p.190 | 1876 A.s., 
A. Boeck, Skand. Arkt. Amphip., v.2 p.326 | 1887 A. smittii, H. J. Hansen in: Dijmphna 
Udb., p.223 | 1894 A. smitti, T. Stebbing in: Bijdr. Dierk., v.17 p.35 | 1893 Para- 
tylus s., P. smithi, G. O. Sars, Crust. Norway, v.1 p.468; t.165 f.1 | 1898 Atylus 
swammerdamii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 698. 


Body highly compressed, very distinetly carinate, peraeon segments 5—7 
and pleon segments 1—4 produced to compressed teeth, the size at first 
small but encreasing successively to that on segment 4, which is preceded 
by the usual notch. Head, rostrum sometimes reaching end of 1° joint of 
antenna 1, lateral margin sinuous, forming below a deflexed lobe defined - 
by a notch, post-antennal corners not produeed. Side-plate 1 narrow, 
bent forward, distally a little widened and serrate, 24 narrow, 3% and 4b 


Ba en le a Bu nd En ae ae ah a rl, en 


Nototropis 383 


broader, less deep, distal border slightly emarginate, 5t" with front lobe 
subacute. Pleon segment 3, postero-lateral corners rotundo-quadrate with 
minutely produced point. Eyes small, rounded, carmine. Antenna 1 very 
slender, nearly '/, as long as body, 1°* joint much shorter than 24, 34 very 
small, flagellum about twice as long as pedunele, with about 45 joints. 
Antenna 2 little longer, ultimate and penultimate joints of peduncle subequal, 
flagellum about as long as peduncle, with 50 short joints. Gnathopods 1 
and 2 very slender, 5tk joint longer, little narrower than 6%, both densely 
getose, palm rather oblique, shorter than hind margin. Gnathopod 2 longer 
and more slender than gnathopod 1. Peraeopods 1 and 2, 4 joint scarcely 
as long as 5t" and 6!" combined, 5t" much shorter than 6th. Peraeo- 
pods 3—5 rather long, 5% joint much longer than 6*h, finger scarcely 
reversed, 24 joint in peraeopod 3 with lower hind corner acute but scarcely 
produced, 24 joint in peraeopod 5 very wide, and distally abruptly narrowed, 
scarcely forming a lobe and not ending acutely. Branchial vesicles not 
pleated. Uropod 3, rami extending much or little beyond uropods 1 and 2, 
4 or 5 times as long as pedunele, densely spinose. Telson scarcely longer 
than broad, eleft nearly to the base (Boeck: much longer than broad; cleft 
not so far extending), apiees not dehiscent, transversely truncate, each with 
a spinule, L. © 23—35 mm. 
Aretie Ocean (Finmark, Greenland, Spitzbergen, Siberia). 


7. N. homochir (Hasw.) 1885 Atylus h.; Haswell in: P. Linn. Soe. N.S. 
Wales, v.10 p.101 t.13 £. 5—7 (juy.) | 1888 A. h., T. Stebbing in: Rep. Voy. Challenger, 
2.29 9.908 1.74 | 1893 A. svammerdamii (part.). A. DellaValle in: F. Fl. Neapel, v.20 p.698. 


Body highly compressed, very distinetly carinate, peraeon segment 7 
and pleon segments 1—3 produced to minute teeth, the hinder tooth on 
segments 4 and 6 more pronounced, the 4" with the usual notch, the 
coalesced 5 and 6! with a small anterior tooth. Head, rostrum slender, 
acute, reaching middle of 1° joint of antenna 1, lateral margins forming 


inner _ 
plate 


Fig. 77. N. homochir. Fig. 78. N. homochir. 
Mandible. ; Maxilla ı. 


below a deflexed lobe, post-antennal eorners acutely produced. Side-plate 1 
narrow, bent forward, spiniferous, 24— 4! successively wider, also erenulate 
and spiniferous, 4" with lower border a little emarginate, 5tk with narrowly 
produced front lobe. Pleon segments 1—3, postero-lateral eorners produced 
to a small acute point, margin above convex. Eyes oval reniform. Antennae 1 
and 2 elongate, peduncle carinate. Antenna 1, 1% joint distally produced 
into a short tooth, 24 joint rather longer, 39 about !/, length of 24, with a little 
tuberele looking like rudiment of accessory flagellum, flagellum considerably 
longer than pedunele, 40-jointed. Antenna 2 rather longer, ultimate joint 


334 Nototropis, Melphidippidae 


of pedunele longer than penultimate, both long, spinose, flagellum slender, 
rather longer than ultimate joint of pedunele, 35-jointed. Mandible (Fig. 77), 
34 joint of slender palp rather longer than 24, Maxilla 1 (Fig. 78), inner 
plate with 6 setae, outer with 11 spines, 24 joint of palp with slender 
spines on apex of one maxilla and stouter spines on the other, characters 
which probably apply to all the species, but have not been definitely recorded 
for all. Maxillipeds, outer plates reaching end of 24 joint of slender palp. 
Gnathopod 1, 5t" joint slightly shorter and narrower than 6th, Gt narrowly 
oval, widening a little distally, palm oblique, moderately defined. Gmnatho- 
pod 2, 5tk and 6th joints subequal, longer and less spinose than in gnathopod 1. 
Peraeopods 1 and 2 attached as in N. smitti (p. 332) very low down on the side- 
plates, 4! joint as long as 5! and 6tk combined, 5tk very short, shorter 
than the finger. Peraeopod 3, 24 joint piriform, lower hind corner not 
produced, 4 longer than 5th, 5th than 6, Peraeopod 5, 24 joint very 
broad, scarcely forming a lobe below, not produced, 5!" joint as in peraeo- 
pod 4 longer than 4 or 6t, finger reversed. Branchial vesicles simple. 
Uropod 3, rami about thrice as long as peduncle, not reaching beyond 
uropod 1. Telson short, not longer than peduncle of uropod 3, rather 
longer than broad, cleft °/, length, apices subtruncate, each with a spinule. 
L: 14 mm. 


Port Stephens [East-Australia], Port Phillip [southern Australia. Depth 62 m. 


N. villosus (Bate) 1862 Aiylus v., Bate, Cat. Amphip. Brit. Mus., p. 135 t. 26 
f.1 | 1893 A. smammerdamii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 698. 


L. 23 mm. 
South-Atlantie (Hermit Island, lat. 56° S.). 


26. Fam. Melphidippidae 


1899 Melphidippidae, T. Stebbing in: Ann. nat. Hist., ser.7 v.4 p.210 | 1899 M., 
T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 422. 


Some of the segments dentate, body extremely slender. Head without 
distinet rostrum. Side-plates very shallow, 4 not emarginate, 5" with 
front lobe the deeper. Antenna 1 slender, with accessory flagellum. Antenna 2 
not longer than antenna 1. Upper lip rounded, with,slight emargination. 
Lower lip with inner lobes well developed. Mandible with slender palp; 
maxilla 1, inner plate with many setae; maxilla 2, inner plate fringed on 
inner margin; maxillipeds, outer plates with spine-teeth on inner margin. 
Gnathopods 1 and 2 weakly subchelate, 5th joint rather elongate. Peraeo- 
pods 1—5 long and slender. Peraeopods 3—5, 24 joint little expanded. 
Branchial vesicles simple. Marsupial plates narrow. Uropods 1 and 2, 
outer ramus the shorter. Uropod 3 very elongate. Telson cleft. 


Marine. 


2 genera, 5 species. 


Synopsis of the genera: 


Eyes imperfeetly developed; antenna 1, accessory 

flagellum well developed. . . 2... ... 1. Gen. Melphidippa . . . p.335 
Eyes strongly developed; antenna 1, accessory 

flagellum diminutive . . ». ». . » 2 2 2 2.2. 2. Gen. Melphidippella . . p. 357 


Melphidippa 335 


1. Gen. Melphidippa Boeck 


1871 Melphidippa (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.218 | 1876 
M., A. Boeck, Skand. Arkt. Amphip., v.2 p.413 | 1894 M., G. O. Sars, Crust. Norway, 
v.l p.482. 


Side-plate 1 triangularly produced, lower margin fringed with setules. 
Eyes imperfectly developed. Antenna 1, peduncle rather long, accessory 
flagellum well developed. Antenna 2 with peduncle long and densely setose. 
Mandible, 34 joint of palp little‘ shorter than 24. Maxillipeds, palp elongate.. 
Gnathopod 1, 5th joint expanded proximally. Peraeopods 1 and 2 setose, 
finger long, with setae on both margins. Peraeopods 3—5, finger small, 
in peraeopods 4 and 5 reversed. Uropod 3, peduncle elongate, narrow, 
rami subequal, linear, spinose. Telson triangular, longer than broad, apices. 
bidentate. 


4 species. 


Synopsis of species: 


1 j Palm of gnathopod 2 excavate and rather long . . 4. M. serrata . . p.337 
\ Palm of gnathopod 2 not excavate, short — 2. 
PR] BaRaae 3, OR Jam BE 2. en seen, 1. M.goösi . . . p.335- 
2, Antenna 1, 3d joint long — 3. 
‘‘ Antenna 1, 2d joint much longer than 15t; gnatho- - 

3 | pod 2, 5th joint much longer than 6th. .. .. 2. M. macrura. . p. 336: 
| Antenna 1, 2d joint not much longer than 1st; gnatho- 

pod 2, 5th joint not longer than 6th. ..... 3. M. borealis.. . p. 336 


1. M. godsi Stebb. 1866 Gammarus spinosus (non Cancer (@.) s., Montagu 
1813), Goös in: Öfv. Ak. Förh., 0.22 p.530 t.40 f.30 | 1871 Melphidippa spinosa, 
A. Boeck in: Forh. Selsk. Chicken 1870 p.219 | 1876 M.s., A. Boeck, Skand. Arkt. 
Amphip., v.2 p.417 t.23 f.4 | 1894 M. s., G. O. Sars, Crust. Norway, v.1 p.483 t.169 | 
1893 Ceradocus spinosus, A. Della Valle in: F. Fl. Neapel, v.20 p. 719 | 1899 Melphidippa. 
go@si, T. Stebbing in: Tr. Linn. Soe. London, ser.2 0.7 p. 422. 


Pleon segments 1—3 each produced into 3 sharp dorsal teeth, with. 
small denticles between them, segments 4 and 5 each produced into a large 
simple tooth. Head, lateral corners obtusely truncate. Pleon segments 1—3, 
postero-lateral margins irregularly dentate, in segment 3 postero-lateral 
corners acutely produced. Eyes oval, narrowed above, red with whitish‘ 
coating. Antenna 1 long, 24 joint much longer than 1°, 34 scarcely '/, as long 
as 24, flagellum nearly thrice as long as peduncle, 24-jointed; accessory 
flagellum not very large, 2-jointed. Antenna 2 rather shorter, ultimate joint 
of pedunele shorter than penultimate, flagellum about half length of peduncle. 
Gnathopod 1, 5th joint broad, laminar, densely setose at base, narrowed 
distally, 6 much shorter, subfusiform, setose, palm ill-defined, finger slender, 
curved. Gnathopod 2 much more slender, 5t" and 6tk joints narrow, subequal, 
palm very short, finger extremely small. Peraeopods l.and 2, 5tk joint 
longer than 4! or 6, Peraeopod 3, 24 joint acutely produced at lower 
hind angle. Peraeopods 3—5, 4tk and 5tk joints subequal, 6% much shorter. 
Uropod 2, outer ramus about half length of inner, longer than peduncle. 
Uropod 3, inner ramus rather the longer, nearly as long as the elongate 
pedunele. Telson nearly twice as long as broad, with a row of spinules 
along each margin, cleft nearly to middle, with a pair of plumose (auditory) 
setae near top of cleft, a long spine in each apical notch, of which the 


336 Melphidippa 


outer tooth is the longer. Colour whitish, varied with reddish brown. 
L. © 9 mm. 


Aretie Ocean, North-Atlantie and North Sea (Spitzbergen, Kara Sea, Norway, 
Seotland). Depth 9—94 m. \ 


2. M. macrura O.Sars 1894 M. m., G.O.Sars, Crust. Norway, v.1l p.484 
4.170 £.1. 


Pleon segments 1—3 each produced to a dorsal tooth, with the hind 
margin on either side of it finely denticulate, segments 4 and 5 each 
produced to a long somewhat curved tooth. Head, lateral corners narrowly 
rounded. Pleon segments 1—3, postero-lateral margins smooth, except in 
segment 3, which has the postero-lateral corners produced to a small tooth. 
Eyes about as in M. goösi (p. 335). Antenna 1, 24 joint nearly twice as long as 
1°t, 34 nearly ?/, length of 24, flagellum little longer than peduncle, about 
15-jointed, accessory flagellum rather long, 4-jointed. Antenna 2 searcely 
shorter, ultimate joint of peduncle rather longer than penultimate, and longer 
than flagellum. Gmathopod 1, 5% joint less expanded than in M. goösi. 
Gnathopod 2, 5th joint expanded in an oblong form between the narrow 
extremities, 6% much smaller, subfusiform as in gnathopod 1, finger rather 
elongate. Peraeopods 1 and 2, 5tk joint subequal to 6th, and scarcely 
longer (shorter in figure) than the 4, Peraeopods 3-—-5 as in M. goösi, 
.except that the 24 joint of peraeopod 3 is not produced. Uropods 1—3 
nearly as in M. goösi, except that uropod 3 is still more elongate, with 
the peduncle considerably longer than the rami. Telson with a single pair 
of lateral spinules close to the base, 2 pairs of setae near top of cleft, 
which extends beyond the middle, inner tooth of each bidentate apex very 
short, the spine in the noteh not elongate. L. © 8 mm. 


North-Atlantie (West-Norway). 


3. M. borealis Boeck 1871 M.b., A. Boeck in: Forh. Selsk. Christian., 1870 
p. 219 | 1876 M. b., A. Boeck, Skand. Arkt. Amphip., v.2 p.415 t.23 f.3 | 1894 M. b., 
G. ©. Sars, Crust. Norway, v.1 p.486 t.170 f.2 | 1893 Ceradocus b., A. Della Valle in: 
F. Fl. Neapel, v.20 p. 720. 


Pleon segments 1—5 each produced into a small dorsal tooth, with 
dentieulation of the hind margin on either side of it in segments 2—5. 
Head, lateral corners broadiy rounded. Pleon segments 1—3, postero- 
lateral margins smooth, postero-lateral corners of segment 3 quadrate. Eyes 
rather small, rounded, red with whitish coating. Antenna 1, 24 joint longer 
than 1°, 34 about half as long as 24, flagellum twice as long as peduncle, 
19-jointed, accessory flagellum longer than 34 joint of pedunele, 5-jointed. 
Antenna 2. scarcely shorter, ultimate and penultimate joints of pedunele 
subequal, flagellum half as long as pedunele, 4-jointed. Gnathopod 1 about 
as in the preceding species. Gnathopod 2, 5" joint a little expanded, 6% fully 
as long as 5th, long oval, palm very short, finger small. Peraeopods 1 
and 2, 5th joint nearly as long as 4, longer than 6%, Peraeopods 3—5 
as in M. macrura. Uropods 1—3 as in M. goösi (p. 335). Telson very 
narrow, nearly thrice as long as broad, eleft beyond middle, lateral margins 
smooth, a small spine in each apical notch. Colour whitish, broadly 
banded across with chestnut brown patches; ova in pouch dark bluish. 
L. © 7 mm. 

Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (Norway from Christiania- 
fjord to Vadsö). Depth 54—188 m. 


Melphidippa, Melphidippella 337 


4. M. serrata (Stebb.) 1888 Neohela s., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1215 t.136 | 1893 N. s., A. Della Valle in: F. Fl. Neapel, v.20 p.343 | 1894 
Melphidippa s., (T. Stebbing in:) G. O. Sars, Crust. Norway, v.1 p.624 | 1899 M. s., 
T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 422. 


Pleon segments 1—5 agreeing with those of M. borealis, but the 
1° also dorsally denticulate and the 3% with postero-lateral corners produced 
' into an acute tooth. Head with rostrum produced beyond tlıe narrow lateral 
corners. In general agreeing with M. borealis, but gnathopod 2 with 6% joint 
not quite so long as 5t%, and having a rather long, oblique, well excavate 
palm, and the finger not very small, the telson deeply cleft, with somewhat 
divergent lobes. Peraeopods 3—5, uropods 1—3, much of antennae 1 and 2 
and apices of telson missing. Triturating organs of stomach seemingly 
devoid of strong spines. L. 8 mm. 


Cumberland Bay [Kerguelen Island]. Depth 239 m. 


2. Gen. Melphidippella 0. Sars 


1871 Melphidippa (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.218 | 1894 
Melphidippella (Sp. un.: M. macera), G. O. Sars, Crust. Norway, v.1 p. 487. 


Side-plate 1 subquadrate. Eyes well developed. Antenna 1, peduncle 
not very long, accessory flagellum rudimentary. Antenna 2 shorter than 
antenna 1 in Q, but not in d. Mandible, 3% joint. of palp much shorter 
than 24, Maxillipeds, palp not elongate. Gnathopod 1, 5" joint scarcely 
expanded proximally. Peraeopods 1 and 2 extremely slender, finger very 
short. Peraeopods 3—5, finger reverted. Uropod 3, pedunecle elongate, 
sublaminar, rami subequal, narrowly lanceolate. Telson triangular, longer 
than broad, apices bidentate. 


1 species. 


1. M. macra (Norm.) 1869 Atylus macer, A. M. Norman in: Rep. Brit. Ass., 
Meet. 38 p. 280 | 1888 A.? m., T. Stebbing in: Rep. Voy. Challenger, v.29 p.1628 | 1889 
Melphidippa macra, A. M. Norman in: Ann. nat. Hist., ser.6 v.4 p. 121 t.10 £.14; t.12 
f.4—7 | 1893 Ceradocus macer, A. Della Valle in: F. Fl. Neapel, v.20 p.720 | 1894 
Melphidippella macera, G. O. Sars, Crust. Norway, v.1 p.488 t.171 | 1871 Melphidippa 
‚longipes, A. Boeck in: Forh. Selsk. Christian., 1870 p.219 | 1876 M.I., A. Boeck, Skand. 
Arkt. Amphip., v.2 p.414 t. 24 £.5. 


Peraeon in Q rather tumid. Pleon segments 1—5 each produced 
dorsally to a tooth, with the hind margin on either side of it finely denti- 
eulate.e Head short, but broad and deep, rostrum small, lateral lobes 
swollen and produced to an acute deflexed point. Side-plate 1, lower front 
corner minutely produced, 24 obliquely truncate belew, 5!" in front as deep 
as 4. Pleon segment 3, postero-lateral corners acutely produced, postero- 
lateral margin minutely serrate. Eyes large, semi-globose, red, on lateral 
lobes ofhead. Antenna 1 long, 1% joint thick, subequal to 2% and 34 combined, 
34 very small, flagellum more than 4 times as long as peduncle, slender, with 
about 22 joints, accessory flagellum a minute setulose nodule. Antenna 2, 
penultimate joint of pedunele longer than ultimate, in S somewhat laminar, 
flagellum in 9 shorter than peduncle, with about 7 joints, in S fully as 
long as pedunele, with about 12 joints. Gnathopod 1, 5t% joint rather 
compressed, densely setose on hind margin, narrowing distally, 6{% much 
shorter, narrowly fusiform, finger slender. Gnathopod 2 rather longer, 5% joint 
Das Tierreich. 21. Lief.: T.R. R. Stebbing, Amphipoda I. 22 


838 Melphidippella, Eusiridae, Eusirus 


rather narrow, in length subequal to the sublinear 6tt, which has a very short 
palm and finger to match. Peraeopods 1 and 2, 4th, 5th and 6th joints 
subequal. Peraeopods 3—5 longer and somewhat stronger. Uropod 3, rami 
a little longer than peduncle. Telson cleft much beyond the middle, slender 
spinules along lateral margins, a long spine in each apical noteh. Colour 
brick-red, mottled with opaque white. L. 6 mm. 


North-Atlantie, North-Sea and Skagerrak (Norway, Shetland Isles); Kattegat. 
Depth 11—54 m. 


97. Fam. Eusiridae 


1888 Eusiridae, T. Stebbing in: Rep. Voy. Challenger, v.29 p.953 | 1898 E., 
G. O. Sars, Crust. Norway, v.1 p.414. 


Pleon strongly developed. Head, margins incised for base of antenna 2. 
Side-plate 1 usually distally expanded (Fig. 79 p. 341). Antennae 1 and 2 
(Fig. 82 p. 347), pedunele long; antenna 1 usually with small accessory 
flagellum. Upper lip not bilobed. Lower lip with small inner lobes. Mandible, 
molar generally well developed, 3% joint of palp elongate. Maxillae 1 and - 
2 and maxillipeds normal; maxillipeds with strong palp. Gnathopods 1 
and 2 (Fig. 80 p. 344) subequal, with large subchelate hands. Peraeopods 1 
and 2 slender, shorter than the hinder peraeopods. Uropod 3 usually with 
subequal rami (Fig. 81 p. 344). Telson large, partly cleft. 


Marine. 


6 genera, 26 accepted species and 1 obscure. 


Synopsis of genera: 


Gnathopods 1 and 2, 6th joint attached to 
produced apex of 5th — 2. 

Gnathopods 1 and 2, 6th joint with normal 
attachment to 5öth — 3, 


Gnathopods 1 and 2 (Fig. 79), 5th joint with 


9 hind lobe prominent . » .. » 2.2... 1. Gen. Eusirus ... . . p. 838 
| Gnathopods 1 and 2, 5th joint with hind lobe 
not. prominöhE +. 3: Er ai en 2. Gen. Eusiropsis. . . p.848 
5 TERIRIDRRE BOB nn are 3. Gen. Eusiroides. . . p.345 
\ Peraeopods (Fig. 83 p. 347) slender — 4. 
4 a a RE ee 4. Gen. Cleonardo.. . . p.346 
Body spiny and carinate — 5. 
P { En ee oe Br EN 5. Gen. Rhachotropis . p.347 
TOR ON I ae 6. Gen. Rozinante . . . p.354 


1. Gen. Eusirus Kroyer 


1845 Eusirus (Sp. un.: EZ. cuspidatus), Kreyer in: Naturh. Tidsskr., ser.2 v.1 
p. 501, 511 | 1861 E. A. Boeck in: Forh. Skand. Naturf., Mede 8 p.655 | 1888 E., 
T. Stebbing in: Rep. Voy. Challenger, v.29 p. 964 | 1893 E., A. Della Valle in: F. Fl. 
Neapel, v.20 p.669 | 1898 E., G. O. Sars, Crust. Norway, v.1 p.415 | 1873 Eusinus, 
A. Marschall, Nomenel. zool., p. 409. 


Body compressed, more or less carinate, with dorsal projeetions. Head, 
rostrum small, lateral corners short, broad. Side-plate 4 the largest, emarginate 
behind. Pleon segment 3, postero-lateral angles not produced, lateral margin 


se i > Ei : % - er 


Eusirus 339 


serrate. Eyes distinctt. Antenna 1,34 joint short, more or less covered 
by 2 dentate lobes of 24 joint, accessory flagellum a small linear joint with 
minute 24. Upper lip rounded. Mandible, cutting edge almost undivided, 
accessory plate dentate, spines of spine-row small, 3% joint of palp as long 
as 1° and 24 combined. Maxilla 1, inner plate with 1 or 2 setae, outer at least 
sometimes with 11 spines, palp not widened distally. Maxilla 2, both plates 
short, broad, apically rounded, inner the broader. Maxillipeds, inner plates 
sometimes partly coalesced, outer of moderate size, fringed with setiform 
spines, palp robust, finger unguiform. Gnathopods 1 and 2 (Fig. 79), 
5th joint prolonged in front, behind produced to a narrow setose lobe, 
6! very large, subquadrate or transversely elliptical, attached to the 5" joint 
only by its proximal front corner, palm nearly transverse, defined by a 
tooth and palmar spines, its edge sharp, minutely setose, finger long, slender, 
eurved. Peraeopods 1 and 2 generally very slender. Peraeopods 3—5 
long, 24 joint oblong oval or piriform. Uropod 3, rami lanceolate, spinulose. 
Telson elongate, tapering, eleft or notched. 


8 species. 


Synopsis of species: 


1 Telson eleft beyond one third of length — 2. 
Telson not cleft beyond one third of length — 4. 


Peraeopods 1 and 2, 4th joint not nearly twice 
Be Eee en ae 4 1. E. cuspidatus . . p.339 

Peraeopods 1 and 2, 4th joint twice as long 

as 5th — 8, 

3 ı Antenna 1, 1st joint much longer than 24 . . . 2. E. propinquus . . p.340 
Antenna 1, 1st joint not much longer than 24 . 3. E. antarcticus . . p.340 
| Only 2 segments are dorsally produced into a tooth 4. E.longipes . . . p.341 

3 segments are dorsally produced into a tooth — 5. 


f Pleon segment 3 dorsally dentate -- 6. 
| Pleon segment 3 not dorsally dentate — 7. 


6 H Telson eleft nearly one third of the length. . . 5. E,leptocarpus . . p.341 
Telson with minute apical notch. .. . .. » . 6. E. biseayensis . . p. 342 

| Peraeopods 3—5, 6th joint not twiee as long as 24 7. E. minutus . . . p.342 
Peraeopods 3—5, 6th joint nearly thrice aslong as2d 8. E.holmii . . . . p.342 


1. E. euspidatus Kroyer 1845 E.c., Kreyer in: Naturh. Tidsskr., ser.2 vl 
p-501 t.7 f.1 | 1874 E.c., Buchholz in: Zweite D. Nordpolarf., v.2 p.313 Crust. t.3 
f.2,2b | 1893 E. c., G. ©. Sars, Crust. Norway, v.] p.416 t,146 | 1893 E. c. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p.669 t.18 f.41—50; t.59 f. 79—82. 


Body rather robust, carina produced to acute dorsal tootb in peraeon 
segments 6 and 7 and pleon segments 1 and 2; pleon segment 4 partly carinate. 
Head, rostrum short, obtuse, lateral corners slightly bilobed. Side-plate 1 
moderately expanded distally, front corner rounded, hinder serrate with 3 
denticles, as in the rather tapering 24 and 34, Pleon segment 3, postero- 
lateral corners evenly rounded, eonvex lateral margin minutely serrate. Eyes 
rather large, oval reniform, red. Antenna 1, 1% and 24 joints subequal, 
with dentate apical lobes, flagellum about twice as long as peduncle, with 
about 50 short joints, accessory flagellum very small, scarcely as long as 34 joint 
of pedunele. Antenna 2 considerably shorter, ultimate and penultimate joints 
of peduncle subequal, together fully as long as flagellum. Gnathopods 1 and 
2 rather robust, lobe of 5% joint prominent, 6!" not much broader than long, 

22* 


340 Eusirus 


rounded quadrangular, palm little arched, finger powerful. Peraeopods 1— 5 more 
robust than in other species, very spinulose. Peraeopods 1 and 2, 4 joint 
not much longer than 5t". Peraeopod 5, 24 joint not nearly twice as long 
as broad, in length subequal to 6% joint. Uropod 3, inner ramus rather 
longer than outer. Telson large, slightly tapering, cleft nearly to centre, 
fissure not dehiseent till near to the acute divergent apices. Colour uni- 
formly yellowish, or whitish yellow passing over to the colour of the face. 
L. reaching 39 mm. 

North-Atlantie and Arctic Ocean (Greenland, Spitzbergen, Finmark). Depth 
38—113 m. 


2. E. propinguus 0. Sars 1893 E. propingvus, G. O. Sars, Crust. Norway, 
v.1 p.417 £.147 £.1. z 

Body moderately slender, not strongly carinate, peraeon scarcely carinate 
till segment 7, which has the dorsal tooth almost obsolete, only pleon segments 1 
and 2 produced into a prominent dorsal tooth. Head, rostrum small, lateral 
corners nearly transversely truncate. Side-plate 1 well expanded distally, front 
corner rounded, hinder with 1 denticle. Pleon segment 3, postero-lateral 
corners narrowly rounded, lateral margin finely serrate. Eyes large, oval 
reniform, light red. Antenna 1 in 9, 1° joint fully as long as 24 and 
34 combined, with dentiform apical lobe, flagellum scarcely as long as 
peduncle, 34 joint of.peduncle and the flagellum calceoliferous on lower margin, 
accessory flagellum linear, longer than 34 joint of peduncle. Antenna 2 little 
shorter, ultimate joint of peduncle rather shorter than penultimate, both 
with flagellum calceoliferous on upper margin, flagellum about half as long as 
pedunele. Gnathopods 1 and 2 less robust than in E. cuspidatus (p. 339), lobe 
of 5tk joint very narrow, 6!" nearly elliptical, much broader than long, palm 
rather arched, finger very slender. Peraeopods 1 and 2 very slender, 4! joint 
twice as long as 5tl, Peraeopods 3—5 rather slender, 6" joint narrow, 
long, finger slight; 2° joint in peraeopod 5 nearly twice as long as broad, hind 
margin insinuate. Uropod 3, rami narrowly lanceolate, inner little longer 
than outer, both with setae as well as spinules on inner margin. Telson 
narrow, tapering, margins finely spinulose, cleft not quite to middle, apices 
acute, searcely divergent. Colour semipellueid, orange-tinted, reddish brown 
on hinder margins of segments, antennae 1 and 2 banded with red. 
L. © 12 mm. 

North-Atlantie and Aretie Ocean (Trondhjemsfjord, depth 188—282 m; Selsövig 
[Nordland]; Finmark). 


3. E. antareticus G.M. Thoms, 1880 E. cuspidatus var. a., G. M. Thomson 
in: Ann. nat. Hist., ser.5 v.6 p.4 | 1888 E. longipes (err., non A. Boeck 1861!), T. Stebbing 
in: Bap- Voy. Challenger, v.29 p.965 t.87 | 1893 E.1.?, G. O. Sars, Crust. Norway, v.1 
p-421 ! 1893 E. cuspidatus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 669, 671. 


Eroeedingly like E. propinquus; differs in following points. Side- 
plate 1 more produced forward. Peraeon segment 7 with dorsal tooth 
more pronounced. Eyes rather dark brown (in spirit), visual elements 
well developed. Antennae 1 and. 2 apparently not calceoliferous. Antenna 1, 
1st joint much thicker, scarcely longer than 24, in J transversely banded 
below with setules, accessory flagellum linear, length variable, but scarcely 
longer than 34 joint of peduncle, flagellum of many short joints, the 
1° sometimes long. Antenna 2 in d, upper margin of ultimate and pen- 
ultimate joints of peduncle transversely banded with setules. Mandible, 
molar prominent, but smaller than that figured by Sars for E. propinquus. 


ne an = EZ ? 1 Se ET 
N Eee ee 


Eusirus 341 


Maxillipeds, finger well formed, ending in a spine or nail, its concave margin 
armed with 4 spinules. Gnathopods 1 and 2 (Fig. 79) agreeing with E. longipes 
more nearly than E. propinquus. Uropod 3 in young C without, in adult 9 
probably with a fringe of setae as in the two species compared. Telson eleft 
for barely °/, of length, apices a little divergent. L. 9 mm. 


South Paeifie (New Zealand); Southern Indian Ocean (Kerguelen Island, Heard 
Island). Depth 282 m. 


’ 4. E.longipes Boeck 1861 E.1., A. Boeck in: Forh. Skand. Naturf., Mode 8 

p.656 | 1876 E. 1, A. Boeck, Skand. Arkt. Amphip., v.2 p.504 t.19 f.4 | 1893 E. 1, 
G.O.Sars, Crust. Norway, v.1 p.420 t.148 f.1 | ?1862 E. helvetiae, Bate (& Westwood), 
Brit. sess. Crust., v. 1 p. 267 £. | ?1862 E. h., E. helvetioe, Bate. Cat. Amphip. Brit. Mus,., 
p-155 t.29 f.1 | 1866 E. bidens, Cam. Heller in: Denk. Ak. Wien, v.2611 p.82 1.3 f.19 | 
1893 E. cuspidatus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 669. 


Body moderately slender, dorsal carina only slightly indieated, only 
pleon segments 1 and 2 produced into a dorsal tooth. Head, lateral corners 
obtusely truncate. Side-plate 1 well produced and rounded in front, side- 
plates 1—3 with 2 denticles at lower hind corner. Pleon segment 3, postero- 
lateral corners narrowly rounded, convex lateral margin coarsely serrate. 
Eyes very large, oblong reniform, bright 
red. Antenna 1, 1° joint subequal to 24, 
with several dentiform apieal projections, 
24 with the usual 2, of which the inner is 
5-dentate, flagellum nearly twice as long 
as peduncle, with 40—50 joints, calceoli- 
ferous, accessory flagellum very narrow, 
subequal to 39 joint of peduncle. Antenna2 RE REN 
considerably shorter, ultimate joint of ner ip 
pedunele longer than penultimate, together 
as long as flagellum, ultimate joint of peduncle and flagellum ealceoliferous. 
Gnathopods 1 and 2 moderately strong, process of 5% joint slender, 6! sub- 
quadrate, little broader than long, palm slightly arcuate, finger slender. 
Peraeopods 1—5 very slender and long. Peraeopods 1 and 2, 4% joint 
subequal to 6%, not nearly twice as long as 5th, Peraeopods 3—5, 24 joint 
not broadly oval, strongly serrate behind. Uropod 3, rami subequal, narrowly 
lanceolate. Telson comparatively small, tapering, cleft scarcely '/, of length, 
apices acute, very little divergent. Colour straw-yellow, mottled all over 
with brick-red specks; ova dark bluish green. . L. Q reaching 13 mm. 


Aretic-Ocean, North-Atlantic, North-Sea and Skagerrak (Norway, depth 56—188 m; 
Shetland Isles; Firth of Clyde; France); Adriatie. 


--5!b joint 
6b joint -- 


. 5. E.leptocarpus 0. Sars 1893 E.?!., G.O.Sars, Crust. Norway, v.1 p.422 
t. 148 f. 2. 


Hind part of body distinetly carinate, pleon segments 1—3 produced 
to dorsal tooth. Head, lateral corners truncate. Side-plate 1 well expanded, 
narrowiy rounded in front, hind corner smooth. Pleon segment 3, postero- 
lateral corners narrowly rounded, fine serration of lateral margin turning 
the corner as in E. propinquus. Eyes faintly traced in speeimens in spirit. 
Antenna 1, 1% joint subequal to 24, both long, flagellum shorter than pedunele, 
without calceoli, accessory flagellum linear, fully as long as 34 joint of 
peduncle. Antenna 2 not much shorter, ultimate joint of peduncle shorter 
than penultimate, flagellum about */, as long as peduncle, without calceoli. 


ee EN 


En 


ee 
BE NG 
ea 


342 Eusirus 


Gnathopods 1 and 2 rather large, 5! joint long, distally attenuated, 6!" fully 
twice as broad as long, palm evenly curved, finger narrow, long. Peraeo- 
pods 1—5 rather slender. Peraeopods 1 and 2, 4 joint rather longer than 
6th, nearly twice as long as 5tk,. Peraeopods 3—5, 24 joint narrowly oval, 
finely serrate behind. Uropod 3, rami subequal, narrowly lanceolate. Telson 
as in E. longipes (p. 341), but comparatively larger. L. Q 8 mm. 


Hardangerfjord, depth 564-752 m; Trondhjemsfjord. 


6. E. biscayensis Bonnier 1896 E.b., J. Bonnier in: Ann. Univ. Lyon, v.26 
p.651 1.39 £.1. 


Peraeon segment 7 with slight carina ending in denticle, pleon segment 3 
with carina ending in tooth. Head, rostrum narrow, as long as 1° joint 
of antenna 1. Side-plate 1 quadrate. Pleon segment 3, postero-lateral margin 
serrate. Eyes reniform. Antenna 2, ultimate and penultimate joints of 
peduncle equal, flagellum calceoliferous. Mouth-parts in most respects normal, 
but inner plate of maxilla 1 with 2 setae, outer with 8 spines. Gnathopods 1 
and 2, 5th joint elongate, hind lobe small, acute, with only 2 setae, 6! more 
than twice as broad as long; the long, curved palm defined by a little 
hollow with palmar spines. Peraeopods 1 and 2 very slender, 4tk joint not 
longer than 5th, Peraeopods 3 and 4, finger nearly half as long as 6t% joint. 
Uropods 1 and 2 spinulose, outer ramus little shorter than inner. Telson 
minutely notehed at apex. Antenna 1 except 1° joint, terminal joints of 
peraeopod 5, and uropod 3 unknown. L. 9 12 mm. 


Bay of Biscay. Depth 940 m. 


7. E. minutus O. Sars 1893 E. m., G. O. Sars, Crust. Norway, v.1 p.419 £.147 £.2. 


Body rather stout, hind ‘part distinctly carinate, peraeon segment 7 
and pleon segments 1 and 2 produced to a dorsal tooth. Head, rostrum 
pretty well developed, lateral corners transversely truncate. Side-plate 1 
well expanded, both corners smoothly rounded. Pleon segment 3, postero- 
lateral eorners narrowly rounded, margin finely serrate only a little way 
up, serration turning the corner. Eyes faintly traced in specimens in spirit. 
Antenna 1 in © short, 1° joint thick, longer than 24 and 34 combined, 
with acute apical lobe, inner lobe of 24 joint bidentate. flagellum rather longer 
than pedunele, 10-jointed, without calceoli, accessory flagellum very minute. 
Antenna 1 in G much longer, flagellum about thrice as long as peduncle, 
with many joints, several of the proximal densely elothed with sensory setae. 
Antenna 2 alike in G and ©, ultimate joint of peduncle shorter than 
penultimate, flagellum about ’/,, as long as peduncle. Gmnathopods 1 and 2 
not very strong, process of 5!" joint long, narrow, 6!" scarcely shorter than 
breadth at base, distally somewhat widened, palm little curved. Peraeo- 
pods 1—5 slender, less elongate than in E. propinquus (p. 340). Peraeo- 
pods 1 and 2, 4 joint as long as 6", not nearly twice as long as 5th, 
Peraeopods 3—5, 24 joint strongly serrate behind, in peraeopod 5 broadly 
oval, scarcely at all tapering distally as in other species. Uropod 3, outer 
ramus much shorter than inner. Telson rather long, tapering throughout, 
cleft searcely "/, of length, apices acute, standing well apart. L. 9 about 6 mm. 


Trondhjemsfjord. Depth 752 m. 
8. E.holmii H.J. Hansen 1887 E.h., H.J. Hansen in: Dijmphna Udb., p.224 


t.22 f.1—1b | 1893 E. h., G. O. Sars, Crust. Norway, v.1 p.416 | 1893 E. cuspidatus 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 669. 


Een Sa 


a 


in a R EREIOIIE A Ten FERNE DERETEN ui rn a: RE ” r ER DE ne a a 


Eusirus, Eusiropsis 343 

Body rather slender, peraeon segment 6 a little thickened and rounded, 
segment 7 and pleon segments 1 and 2 produced into a prominent dorsal 
tooth, these 3 and 2 following segments carinate. Side-plate 1 produced 


‚subacutely in front. Pleon segment 3, postero-lateral corners quadrate, above 


the acute point finely serrate-on lateral margin. Antenna 1 long, 1° joint as 
long as 24, flagellum more than twice as long as pedunele, in appearance serrate 
below, by distal widening of the proximal joints, accessory flagellum spine- 
like. Antenna 2 scarcely half as long, much more slender, ultimate joint of 
peduncle in 1 specimen considerably longer than penultimate, only a little 
in a smaller specimen. Gmnathopods 1 and 2 long, slender, 6!" joint trans- 
versely oblong ovate. Peraeopods 1—5 extremely slender and elongate. 
Peraeopods 1 and 2, 4tk joint not nearly twice as long as 5th, Peraeo- 
pods 3—5, 24 joint narrowly oval, distally narrowed, 4% shorter than 5tk, 
5th much shorter than 6, which is 2'/,—3 times as long as 24, finger 


small, straight. Uropods 1—3 long, but strong. Telson narrow, tapering, 


cleft very short, widely separating the acute apices. Colour light rose-red. 
L. © 53 mm. 


Kara Sea. Depth 172—176 m. 


2. Gen. Eusiropsis Stebb. 


1897 Eusiropsis (Sp. un.: E. rüisei), T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 v.7 p.39. 

Body (Fig. 80 p. 344) without dorsal projections. Head rostrate. Side- 
plates shallow. Pleon segment 3, postero-lateral corners not produced, lateral 
margin not serrate. Antenna 1 the shorter, accessory flagellum minute, 


‚l-jointed. Antenna 2, ultimate joint of peduncle in S elongate, Mouth- 


parts nearly as in Eusirus (p. 338), but mandible with molar feeble, maxilla 1, 
inner plate unarmed, outer with 10 spines, 24 joint of palp narrower and 
scarcely longer than 1°. Gmnathopods 1 and 2 as in Eusirus, but hind lobe 
of 5th joint almost obsolete. Peraeopods 1 and 2 slender, finger ending 
obtusely and tipped with long setae. Peraeopods 3—5 slender, elongate, 
finger straight, acute, armed like the preceding joints with long setae. 
Branchial vesieles with accessory lobes. Uropod 3, rami lancevlate, spinulose, 
in J very plumose (Fig. 81 p. 344). Telson narrow, apically cleft. 


1 species. 


1. E. riisei Stebb. 1897 E. r., (nom. sp. Lütken in MS.) T. Stebbing in: Tr. 
Linn. Soc. London, ser.2 v.7 p.39 t.13, 14. 


Peraeon segments 2, 3 and 4 shorter than the others, pleon segments 1—3 
large. Head, rostrum triangular, longer than broad. Side-plates 1 and 2 
very shallow, 24 distally narrowed, 34 securiform,“ front corner rounded, 
hinder acutely produced, 4" nearly transversely oblong, slightly emarginate, 
5th and 6th with hind lobe produced. Pleon segments 1—3, postero-lateral 
eorners rounded (Fig. 80). Eyes wanting. Antenna 1 in J, 1° joint stout, 
with tufts of setules below, 24 a little shorter, calceoliferous, 34 short, flagellum 
rather stout, with at least 30 joints, calceoliferous. Antenna 2, penultimate 
joint of pedunele with tufts of setules above, ultimate joint much longer, 
longer than pedunele of antenna 1, calceoliferous, flagellum longer than peduncle, 
with 42 joints, 27 rather stout, with calceoli, rest more slender, with sensory 
filaments. Upper lip apieally rounded. Lower lip, inner lobes small. Mandible 
with 5 or 6 small spines in spine-row. Maxilla 2, inner plate rather broader 


344 


Eusiropsis 


than outer, scantily armed. Maxillipeds, outer plates not very large, finger 
of palp as long as 39 joint. Gnathopods 1 and 2, 5tk joint not very elongate, 
but having the attachment of the 6!" as in Eusirus, the hind lobe very 


N j 


Fig. 80. E.riisei. Lateral view. 


slight, 6! joint massive, distally widened, palm long, convex, carrying setules 
and ending in a spinigerous pocket, into which the long curved finger inserts its 


Uropod 1 


Fig. sı. E.riisei. 
Uropods 1—3 and telson. 


-- Telson 


apex. Peraeopods1 and 2, finger not 
unguiform, less than half as long as 
6{h, apical margin not acute, fringed 
with 6 plumose setae, mostly of great 
length. Peraeopod 3, 24 joint ex- 
panded, hind margin serrate, 4th, 5th 
and 6% joints all longer than 24, finger 
as long as 24 joint, the limb copiously 
supplied with spines and plumose 
setae. Peraeopod 4, 24 joint larger 
than in peraeopod 3, 5tk joint shorter 
than 6", Peraeopod 5. 24 jointlarger 
than in peraeopod 4, 5tk and 6!" not 
quite so long, plumose setae of striking 
length. In uropod 1 outer ramus a 
little more than half as long as inner, 
in uropod 2 a little less than half; 
in uropod 3 peduncle a little longer 
than in uropod 2, rami long, outer 
a little the shorter (Fig.81). Telson 


longer than pedunele of uropod 3, cleft about a quarter of length, apices 
acute, lateral margins with 2 notches. 
North-Atlantie (lat. 22° N., long. 36° W.). 


L. about 10 mm. 


2 


a än 


# 
= 
> 
2 
E 
F 
" 
# 
» 


Eusiroides 345 


3. Gen. Eusiroides Stebb. 


1888 Eusiroides, T. Stebbing in: Rep. Voy. Challenger, 2.29 .969 | 1893 E,, 
G.O.Sars, Crust. Norway, v.1 p.414 | 1893 E., A. Della Valle in: F. Fl. Neapel, 0.20 p.671. 


Body with rounded back, not carinate. Side-plate 1 distally widened. 
Calceoli present on antennae 1 and 2 in © ; accessory flagellum of antenna 1 


"eonsisting of 1 narrow short joint. Maxilla 1 with 1—3 setae on inner 


plate, 10 spines on outer. Maxilla 2 with varying proportions of the 2 plates. 
Gnathopods 1 and 2, 5tb joint short, cup-shaped, attachment of 6 normal, 
6! Jarge, oval, palm ill-defined except by spines, finger long, curved. 
Peraeopods 1—5 rather robust, 3I—5! with 24 joint large, broadly oval. 
In other respects scarcely differing from Eusirus (p. 338). 

3 species accepted, 1 obscure. 


Synopsis of accepted species: 


Pleon segment3, postero-lateral margin not serrate 3. E.crassi. .. . . p. 346 

| Pleon segment3, postero-lateral margin serrate — 2. 
9 f Eyes derk-oloured . 22, 24 74 2 1. E. monoculoides . p. 345 
\ Eyes light-eoloured. . . . . Er 2. E. dellavallei . . p. 346 


l. E. monoculoides (Hasw.) 1880 Atylus m., Haswell in: P. Linn. Soe. 
N.S. Wales, v.4 p.327 t.18f.4 | 1888 A.m. + Eusiroides caesaris + E. pompeii, T. Stebbing 
in: Rep. Voy. Challenger, 0.29 p.969; p.970 t.88; p.974 t.89 | 1893 E. m. + E. ce. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 674, 672. 


Pleon segments 1 and 2 dorsally produced to a small acute tooth, 
which is sometimes obsolete. Head, rostrum small, lateral corners rounded. 
Pleon segments 1 and 2 sharply quadrate or a little produced, segment 3 
with postero-lateral margin very convex, serrate with 10—18 upturned 
teeth. Eyes very large, reniform, nearly meeting above, blue-black. Antennal, 
1° joint as long as or longer than 24 and 34 combined, 34 less than half 
as long as 24, both these and flagellum calceoliferous, flagellum nearly 
twice as long as peduncle, attaining 74 joints, the proximal broader than 
long, elosely set with calceoli, many at intervals distally widened, terminal 
joints slender, without calceoli. Antenna 2 rather shorter, ultimate joint of 
peduncle calceoliferous, a little or scarcely shorter than penultimate, flagellum 
sometimes as long as peduncle, attaining 54 joints, arranged and armed as 
in antenna 1. Maxilla 1, inner plate carrying 2 setae, 1° joint of palp 
more than half as long as 24, which carries many setae on the outer 
margin. Maxilla 2, inner plate broader than outer, and not shorter. Gnatho- 
pods 1 and 2, 5tk joint spinose, 6! broadly oval, narrowest at hinge of 
finger, with transverse groove on outer surface near the base, palm long, 
convex, defined by transverse line of strong palmar spines on inner surface, 
palm border striated, set on both sides with spines and spinules, finger large, 
eurved, with channelled inner margin. Gnathoped 2 rather the larger. 
Peraeopods 1—5 rather robust, carrying many short spines, finger short 
and stout. Peraeopods 3—5, 24 joint well expanded, peraeopods 4 and 5 
rather longer "than 34. Uropods 1—3 spinose, in uropod 1 outer ramus a 
little, in uropod 2 much shorter than the inner, which exceeds all the rest 
in length. Uropod 3, rami subequal. Telson rather long, tapering, eleft 
about to the middle, lateral margins slightly sinuous near base, apices 
narrow, bidentate. Colour light olive, with a few red spots on the antennae. 
L. 6—18 mm. 


South-Paeifie and southern Indian Ocean (Port Jackson, Jervis Bay and Melbourne, 
[Australia]; Heard Island). 


346 Eusiroides, Cleonardo 


2. E. dellavallei Chevreux 1893 E. caesaris (part.) (err., non T. Stebbing 1888!), 
A. Della Valle in: F. Fl. Neapel, v.20 p.672 t.3 f.8; t.17 £.37—48 | 1899 E. dellavallei, 
Cheryreux in: ©.-R. Ass. Franc., Sess. 27 v.2 p.479. 


In close general agreement with E. monoculoides (p. 345), but the large, 
reniform eyes are white with a faint rose tint; in antenna 1 the 34 joint is 
more than half as long as the 24; maxilla 1 has only one seta on the” 
inner plate and only one on outer margin of the palp’s 24 joint; maxilla 2 
bas the inner plate shorter and narrower than the outer. Colour grey, tinged 
with yellowish red. L. about 13 mm. 


Mediterranean (Naples, France); Bay of Cadiz. 


3. E. crassi Stebb. -1888 E. c., T. Stebbing in: Rep. Voy. Challenger, v.29 
p. 977 t.90 | 1893 E. caesaris (part.). A. Della Valle in: F. Fl. Neapel, v.20 p. 672. 


Differing little from E. monoculoides (p. 345). Pleon segments 1 and 2 
not produced into teeth dorsally, but forming a small acute tooth at postero- 
lateral corners, segment 3 with those corners almost quadrate, with no 
serration. Eyes very large, reniform, almost contiguous at top of head. 
Maxilla 1, inner plate long and narrow, with 3 setae, 1° joint of palp half as long 
as 24, 24 with 1 seta on outer margin. Gmathopods 1 and 2, 6tk joint dilated 
about the middle, so that the palm instead of being continuous with the 
hind margin forms a well-marked obtuse angle with it. Telson shorter 
than in preceding species, cleft for less than half its length, evenly tapering 
to subacute apices, which in the single specimen were simple, without any 
notch. L. about 15 mm. 


South-Atlantie (lat. 87° S., long. 54° W.). Depth 1092 m. 


E. lippus (Hasw.). 1880 Atylus I. Haswell in: P. Linn. Soc. N.S. Wales, v.4 
p.328 t.20 f£.1 | ?1885 A.2., Chiltou in: P. Linn. Soe. N.S. Wales, v.9 p. 1037 | 1888 
A.1., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 969. 

L. 6 mm. 


Port Jackson (Clark Island [East-Anstralia]); Sydney Harbour? 


4. Gen. Cleonardo Stebb. 


1888 Cleonardo, T. Stebbing in: Rep. Voy. Challenger, v.29 p.959 | 1895 C., 
G.O. Sars, Crust. Norway, v.1 p. 414. 


Body without dentate or serrate RER: Head rostrate. Side-plates 1—4 
not large but notably deeper than the following, side-plate 1 not produced 
forward, 4t moderately emarginate. Antenna 1 longer than antenna 2 (Fig. 82), 
at least ind‘, both calceoliferous. Upper lip apically convex. Mandible normal, 
34 joint of palp longest, slender. Maxilla 1, inner plate with 2 setae, outer 
with 11 spines, 24 joint of palp not widened distally. Maxilla 2, inner plate 
broader than outer. Maxillipeds, inner and outer plates not very large, 
armature normal, palp long. Gnathopods 1 and 2, 5 joint short, lobed, 
6th elongate oval, finger long, slender, curved. Peraeopods 1—5 (Fig. 83) 
very slender, finger long. Peraeopods 3—5 long, not very unequal. Uropod 3, 

rami lanceolate. Telson long, tapering, deeply cleft. 


2 species. 
Synopsis of species: 


Uropods with the rami unequal, spinulose . . .... 1. C.longipes . . . p.347 
Uropods with the rami equal, almost unarmed . . . . 2. C. appendiculatus p. 347 


Cleonardo, Rhachotropis 347° 


1. C. longipes Stebb. 1888 C. 1, T. Stebbing in: Rep. Voy. Challenger, v. 29 

p. 959 t.86 | 1893 Pontogeneia l., A. Della Valle in: F. Fl. Neapel, v.20 p.618 t.59 £.31. 
. 9 unknown. — J. Head, rostrum short and broad. Side-plates 1--4 
rounded below. Pleon segments 1—3, postero-lateral corners more or less 
acutely produced. Eyes not perceived. Antenna 1, 1° joint stout, with 
obtuse apical tooth, 2% rather longer, 34 very 
short, flagellum longer than peduncle, with 
46 joints, only 1° joint long, most with 24 and 
34 joints of pedunecle calceoliferous. An- 
tenna 2 (Fig. 82) rather shorter, ultimate and 
penultimate joints of peduncle long, ultimate 
the shorter and much narrower, flagellum 
shorter than peduncle, with 35 joints, many 
with ultimate joint of peduncle calceoliferous. 
Gnathopods 1 and 2 rather strong, 5 joint 
eup-shaped, with spinose hind lobe, 6!" oval, 
apically narrowest, palm long, oblique, curved, 
eiliated, defined by a tooth with palmar 
spines. Peraeopods 1 and 2, finger as long 
as 6! joint, with setules on the convex 
margin. Peraeopods 3—5, 24 joint oval, 
in peraeopod 5 (Fig. 83) produced some- 
what downward, 5th—7th joints very long 


24 joint 


Flagellum 


and slender. Pleopods 1—3, each pair closely Fig. 9. Fig. 83. 
united by very short coupling spines and Aue 3 NE ‚Peraeopod 5. 


numerous cleft spines. Uropods 1—3 very 

spinulose, outer ramus shorter and narrower 

than inner. Telson nearly reaching end of uropod 3, cleft for more than 

®/, of length, margins finely pectinate, apices acute, not dehiscent. L. 10 mm. 
South-Paeifie (lat. 370 S., long. 83° W.). Depth 3244 m. 


2. C. appendiculatus (0. Sars) 1879 Tritropis? appendiculata, G. O. Sars 
in: Arch. Naturv. Kristjan., v.4 p.451 | 1885 T.a., G. ©. Sars in: Norske Nordhavs- 
Exp., 0.6 Crust. I p.194 t.16 f.3,3a | 1888 T. a., Cleonardo (part.), T. Stebbing in: 
Rep. Voy. Challenger, v.29 p.498, 959 |; 1898 Pontogeneia?, A. Della Valle in: F. Fl. 
Neapel, v.20 p. 620. 

Peraeon inflated, back rounded, pleon segments 1—3 with distinet 
but low central carina. Head, rostrum exceedingly small, slightly curved, 
lateral corners slightly produced, narrowly rounded. Pleon segments 1—3, 
postero-lateral cornmers acute, postero-lateral margins quite smooth. Eyes 
very small, oval. placed low down, pigment light, whitish. Antennae 1 
and 2 nearly as in C.longipes, but 24 joint of antenna 1 rather shorter 
than 1%. Mouth-parts undescribed. Gnathopods 1 and 2, peraeopods 1—5 
closely resembling those in €. longipes. Uropods 1—3 each with lanceolate, - 
equal rami, without distinet spines or setae. Telson unknown. Colour 
whitish, translucent. L. 13°5 mm. 

Arctie Ocean (lat. 71° N., long. 13° E.). Depth 2423 m. 


Fig. 82 &83. CO. longipss, g. 


5. Gen. Rhachotropis S. I. Sm. 


1871 Tritropis (non Fitzinger 1843, Reptilia!) (part.), A. Boeck in: Forh. Selsk. 
Christian., 1870 p.158 | 1883 Rhachotropis, S. I. Smith in: P.U.S.Mus., v.6 p.222 | 
1888 R., T. Stebbing in: Rep. Voy. Challenger, v.29 p.954 | 1893 R., G. O. Sars, Crust. 
Norway, v.1 p.423 | 1896 Rachotropis, J. Bonnier in: Ann. Univ. Lyon, v.26 p. 658. 


348 Rhachotropis _ 


More or less of the body dorsally and subdorsally carinate. Head 
rostrate. Side-plates rather small, 1° narrowly produced forward, 4 very 
slightly emarginate. Pleon segment 3, postero-lateral corners rounded, 
serrate above. Antenna 1 generally shorter than antenna 2, and sometimes 
with small 2-jointed accessory flagellum. Antennae 1 and 2 larger in C 
than in Q. Mouth-parts nearly as in Eusirus (p. 338). Maxilla 1, outer 
plate with 9 spines (sometimes 8°). Gnathopods 1 and 2 strong, subequal, 
5th joint short, cup-shaped, 6" large, oblong oval, palm very oblique. 
Peraeopods 1—5 slender, long, 5" very long, its 24 joint larger than that 
in 34 and 4 pairs. Uropod 3, rami foliaceous. Telson long, more or 
. less cleft. 


11 species. 


Synopsis of species: 


angle — 2. 
Peraeopod 5, 2d joint not acute at lower hind 
angle — 3. 


1 


Telson cleft for more than a quarter of its 


ER » » . 1. B, aculeata ... . .. p.348 
Telson eleft for less than a quarter of its lengt 2. R. kergueleni . . . p.349 


| Peraeopod 5, 2d joint acute at lower hind 
. 


teeth upturned — 4. 
Pleon segments 1—3 not having some of the 


Pleon segments 1---3 having some of the dorsal 
; | 
dorsal teeth upturned — 5. 


R.grimaldii. . . . p.350 
ZB elogans'. ...,.% p- 850 


f Antenna 1 without accessory flagellum 
\ Antenna 1 with 1-jointed accessory flagellum 


5 [ Eyes well developed — 6. 
Eyes not well developed — 9. 


f Antenna 1, 34 joint very short... ... . 5. R. oceulata. . . .. . p.350 
\ Antenna 1, 3d joint not very short — 7. 


8 


4 


6 


medio-dorsal tooth . ... .. „ar... 2 6. RB. inflata . . .. . p. 351 
| Peraeon segment 7 and pleon segment 3 with 
medio-dorsal tooth — 8. 


| Peraeon segment 7 and pleon segment 3 without 


| Peraeopod 5 not so long as the body . . . 7. R.helleri ..... p. 351 

Peraeopod 5 longer than the body . . . . . ‘8. R. macropus. . . . p.352 

9 Diyer nuidnienlalv a. N rn, 0 9. R. leucophthalma . p. 353 
Eyes wanting — 10. 

10 f Pleon triearinate on segments 2—4. .. . . 10. R.rostrata . . . . p.353 

1 Pleou not -teignsinale 2. a En A 3) p. 853 


1. R. aculeata (Lepech.) 1780 Oniscus aculeatus, Lepechin in: Acta Ac. 
Petrop., 17781 p.247 t.8 f.1 | 1866 Amphithonotus a., Goes in: Ofv. Ak. Förh., «.22 
p-526 | 1874 A. a. (part.), Buchholz in: Zweite D. Nordpolarf., v.2 p.316 Crust. t.4 | 1871 
Tritropis aculeata, A. Boeckin: Forh. Selsk. Christian., 1870 p.158 | 1872 & 76 Acanthonotus 
aculeatus + T. aculeata, A. Boeck, Skand. Arkt. Amphip., v.1 p.37; v.2 p.5ll | 1883 
Rhachotropis aculeata, R. aculata, S. I. Smith in: P. U. S. Mus., 0.6 p.229, 222 | 1893 
R. aculeata, G.O. Sars, Crust. Norway, v.1 p.424 t. 149 | 1894 R. aculeatus, T. Stebbing 
in: Bijdr. Dierk., ©. 17 p.37 | 1898 Pontogeneia aculeata (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p.616 1.59 £.28 | 1821 Talitrus edvardsii, E.Sabine, An.north. Exp., p.55 t.2 
f.1—4 | 1835 Amphithoe edvardsi, J. C. Ross in: John Ross, App. sec. Voy., nat. Hist. 
p-90 | 1846 A. edwardsii, Kroyer in: Naturh. Tidsskr., ser.2 v.2 p.76 | 1862 Amphithonotus e., 


WA a ERTL Zu Dre Pan DE Ba a DR FT = Fr a 
Ko a ae En BE Fe TE ae a 
ET A ER T a N EEE, 


Rhachotropis 349 


Bate, Cat. Amphip. Brit. Mus., p.151 t.28 f.5 | 1867 Amphitonotus e., Packard in: Mem. 
Boston Soe., v.1 p.297 | 1882 Tritropis avirostris, G. O. Sars in: Forh. Selsk. Christian., 
nr. 18 p.105 t.5 f.8 | 1888 Rhachotropis aculeatus (part.) + R. avirostris (part.), 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.49, 954; p. 540. 


}: Peraeon segments 1—5, dorsal carina faintly indicated in large speeimens, 
F segment 6 with 3 teeth, segment 7 and pleon segments 1—4 triply carinate, 

carinae produced into sharp teeth except the lateral of segment 4, which, 

however, like the 5t" and 6", has a small lateral tooth. Peraeon segment 7 has 
E lateral corners acute. Central carina forms 2 successive teeth on each 
B. ‘of pleon segments 1—4. Head with dorsal hump, rostrum nearly reaching 
end of 1° joint of antenna 1, acute, channelled above, carinate below, lateral 
corners with a triangular, somewhat deflexed lobe. Side-plate 1 concave below, 
front corner acute, 1°—34 with hind corner acute, 5tR and 6! sligchtly ridged 
behind. Pleon segment 3, lateral margin very finely serrate. Eyes large, convex, 
rounded triangular, dark brown. Antenna 1, ‚1° joint large, as long as 
24 and 34 combined, with apical tooth, 34 very short, 24 and 34 calceoli- 
ferous, flagellum longer than peduncle, with about 65 short joints, each with 
calceolus; accessory flagellum 2-jointed. Antenna 2 rather longer, ultimate 
and penultimate joints of peduncle subequal, calceoliferous, flagellum longer 
than pedunele, with about 85 calceoliferous joints. Gnathopods 1 and 2 nearly 
equal, 6% joint powerful, palm defined by obtuse spiniferous tooth, finger 
long, evenly curved. Peraeopods 1—5 moderately slender. Peraeopods 3 
and 4, 24 joint rather small, hind margin proximally produced to acute 
triangular process. Peraeopod 5, 24 joint broad above, hind margin angular 
above the middle, acutely produced at apex. Uropods 1 and 2, outer ramus 
R much the ‚shorter; uropod 3, outer ramus a little the shorter, both narrowly 
Be lanceolate; all the rami closely spinulose. Telson very long, tapering, 
— —  elosely margined with spinules, cleft '/, of length, apices approximate, acute. 
Colour variegated with brown, orange and pure white, gnathopods 1 and 2 
carmine. L. 30—44 mm. 


Arctic Ocean (widely distributed, eircumpolar, reaching lat. 82° 27’ N.). Depth 
19—263 m. 


2. R. kergueleni Stebb. 1888 R. k., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.955 .85 | 1895 R.k., G@. O. Sars, Crust. Norway, v.1 p.424 | 1893 Acanthozone k., 
A. Della Valle in: F. Fl. Neapel, v.20 p.612 t. 59 f. 24. 


Peraeon very short, pieon segments 1—4 long, tricarinate, each produced 
into a dorsal tooth, largest on segment 2, segments 1 and 2 with smaller 
tooth on each side. Head, rostrum very long, narrow, subdepressed, lateral 
corners narrow, prominent. Side-plate 1. produced linguiform, 4 moderately 
excavate, 5th and 6th slightly serrate behind. Pleon segment 3, lateral 
margin firmly serrate. Eyes not perceived. Antenna 1, 1% and 24 joints 
subequal, 34 not !/, as long as 24, flagellum much longer than pedunele, with 
34 joints, those of distal half very slender, accessory flagellum not perceived. 
Antenna 2 longer, penultimate joint of peduncle long, fringed with plumose eilia, 
3 ultimate much longer, flagellum longer than peduncle, abruptly narrower, 
j with 37 slender joints. Mandible, molar rather small, palp very large. 
E Gnathopods 1 and 2 similar, gnathopod 2 the larger; 5th joint with distal lobe 
ß well produced, very spinose, 6% large, broadly oval, distally narrowed, palm 

well defined by spinose tooth, finger long, much curved. Peraeopods 1—5 
very slender. Peraeopods 3 and 4, 24 joint very small, in peraeopod 5 


5 
\ 
j 


350 Rhachotropis 


much larger, but still small, in all 3 oval, with lower hind corner acute. 
Uropod 1, rami nearly equal; uropod 2, outer ramus somewhat shorter than 
inner; uropod 3, rami nearly equal, broad and long, narrowing rather 
abruptly to the acute apex; all the rami spinuliferous. Telson long, narrow, 
spinuliferous, more than 3 times as long as broad, tapering little till near 
the acute apices, which are separated by an exceedingly short slightly dehis- 
cent slit. L. 11 mm. 


Southern Indian Ocean (Kerguelen Island). 


3. R. grimaldii (Chevreux) 1887 Tritropis g., Chevreux in: Bull. Soe. zool. 
France, v.12 p.571 | 1888 Bhachotropis g., T. Stebbing in: Rep. Voy. Challenger, v.29 
p. 1641 | 1893 R. g., G. O. Sars, Crust. Norway, v.1 p. 424. 


Peraeon inflated, slightly carinate but without teeth, pleon segments 1—3 
tricarinate, the carinae produced into long sharp teeth, upturned, especially 
those on segment 3. Head, rostrum short, straight, forming an angle with 
upper surface of head, lateral corners elongated, slightly rounded at apex. 
Side-plate 1 produced into a narrow angular lobe, lower margin behind 
ending in an obtuse tooth. Pleon segment 3, postero-lateral lobe prolonged 
backward, broadly rounded, firmly serrate. Antenna 1, 1° joint ending in 
2 denticles, 24 rather longer, 34 not quite half as long as 24, flagellum 11-jointed; 
no trace of accessory flagellum. Antenna 2 longer, ultimate and penultimate 
joints of peduncle long, equal, fagellum 14-jointed. Gmathopod 1, 5% joint 
with long narrow lobe, 6!" large, elongate oval, finger shorter than palm, 
thin, eurved. Gnathopod 2 unknown. Peraeopods 3 and 4, 24 joint narrow, 
smooth. Peraeopod 5, 24 joint with hind margin broadly rounded, strongly serrate. 
Uropods 1—3 long and equal(?). Telson very long, cleft '/, of length. 
L. 11 mm. 


North-Atlantie (Cape Finisterre). Depth 510 m. 


4. R. elegans (Bonnier) 1896 Rachotropis e., J. Bonnier in: Ann. Univ. Lyon, 
v.26 p.658 1.39 f.4. 


Perhaps identical with R. grimaldii. Slightly compressed, peraeon 
segments 1—7 dorsally raised behind, produeing a regularly undulating 
profile, pleon segments 1—3 tricarinate, carinae produced into teeth, some 
slightly upward turned, the central preceded by a small hump, segments 4—6 
without any crest. Head with dorsal bump, rostrum very small. Pleon 
segment 3, postero-lateral margins rather produced, firmly serrate. Eyes 
wanting. Antenna 1 in d, 1° joint long, little longer than 24, 34 very 
short, flagellum longer than peduncle, accessory flagellum a single very 
short joint. Antenua 2 much longer, ultimate joint of peduncle rather 
longer than penultimate, flagellum much longer than peduncle. No calceoli, 
but many long sensory setae. Peraeopod 5, 24 joint figured as oblong 
oval, not narrowed below. Telson reaching extremity of uropod 3 (in figure 
surpassing it), cleft ”/, of length. Many parts figured, but not described. 
L. a little over 9 mm. 


Bay of Biscay. Depth 950 m. 


5. R. oculata (H.J. Hansen) 1887 Tritropis o., H. J. Hansen in: Vid. Meddel., 
ser.4 0.9 p.140 t.5 £.7—7e | 1888 Rhachotropis o., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p. 1644, 1721 | 1893 R.o., 6. O. Sars, Crust. Norway, v.1 p.424 | 1893 Pontogeneia 
aculeata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 616. 


Rhachotropis 361 


Body thick, broad, peraeon unarmed, except for dorsal dentiele on 
segment 7, which has the hind corners acute, pleon segments 1—3 tricarinate, 
teeth acute, except dorsal tooth on segment 3, which is subacute. Head, rostrum 


rather small, lateral corners little produced, slightly rounded. Side-plate 1 


u 
= 


nearly twice as broad as deep. Pleon segment 3, postero-lateral margin 


_ firmly serrate. Eyes very large, triangular, occupying major part of head’s 


“surface, nearly meeting at top, black. Antenna 1, 1° joint very stout, not 
very long, but as long as 24 and 34 combined, 34 very short, flagellum 
rather longer than peduncle, 23-jointed; accessory flagellum apparently 
wanting. Antenna 2 subequal to antenna 1, flagellum rather shorter than 
peduncle. Gnathopods 1 and 2, 6! joint large, broadly oval, defining tooth 


- of palm not very prominent. Peraeopods 1--5 long, slender, successively 
longer. Peraeopods 3—5, 24 joint piriform, very small in peraeopods 3 


and 4, much larger but still small in peraeopod 5. Telson more than twice 
as long as broad, tapering to the acute, little separated apices, cleft °/,, of 
length. L.9 95, 9 11’5 mm. 

Arctie Ocean (Greenland). Depth 19—81 m. 

6. R.inflata (O0. Sars) 1882 Tritropis i., G. O. Sars in: Forh. Selsk. Christian., 


nr. 18 p. 104 t.5 f.7 | 1888 Rhachotropis i., T. Stebbing in: Rep. Voy. Challenger, v. 29 
p- 540 | 1893 & 95 R. tümida, R.i., G.O.Sars, Crust. Norway, v.1 p.430 t.152; p. 697 | 


1893 Pontogeneia aculeata (part.)?, A. Della Valle in: F. Fl. Neapel, 0.20 p. 617. 


Body rather short, peraeon much inflated, dorsally smooth, pleon 
segments 1—3 tricarinate, carinae produced into small teeth, except central 


3 - of segment 3, segments 4—6 quite smooth. Head very broad, rostrum 


rather prominent, lateral corners linguiform, slightly deflexed. Side- 
plates nearly as in R. helleri. Pleon segment 3, postero-lateral margins 
strongly serrate, serration turning the corner. Eyes very large, convex, 
rounded oval, or reniform, dark brown. Antenna 1 in Oo short, without 
distinet calceoli, 1° joint longer than 24, 34 scarcely half as long as 24, 
flagellum longer than peduncle, 9-jointed; accessory flagellum 2-jointed. 
Antenna 2 in O little longer, ultimate and penultimate joints of peduncle subequal, 
flagellum half as long as peduncle, 8- or 9-jointed. Antennae l and 2in d much 
longer; antenna 1, flagellum with 12 joints, 1° very long, densely clothed 
with sensory setae. Gnathopod 1, 6!" joint oval, breadth much more than 
half length; gnathopod 2, 6tk joint twice as long as broad; in both the 
palm evenly curved, defined by slight angle carrying 1 spinule, finger long, 
eurved. Peraeopods 1—5 slender, of moderate length, 24 joint in peraeo- 
pod 3 very slightly expanded, in peraeopod 5 much broader, narrowing 


‚ distally. Uropods 1-3, outer ramus notably shorter than inner, rami of 


uropod 3 narrowly lanceolate. Telson less elongate than usual, carıying a 
large sensory setule above the middle on each side, thence rapidly tapering 
to the acute contiguous apices, cleft almost to the centre. Colour generally 
variegated with patches of carmine and specks of golden yellow, antennae 1 
and 2 and limbs banded. L. O searcely more than 6 mm, J somewhat less. 


Aretie Ocean, North-Atlantic, North-Sea and Skagerrak (Greenland; Kara Sea; 
Norway, depth 19—94 m). 


7. R. helleri (Boeck) 1871 Tritropis h., A. Boeck in: Forh. Selsk. Christian., 
1870 p.159 | 1876 T.h., A. Boeck, Skand. Arkt. Amphip., 0.2 p.518 t.20 £.6 | 1893 
Rhachotropis h., G. O. Sars, Crust. Norway, v.1 p.426 t.150 | 1888 R. aculeatus (part.), 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.954 | 1898 Pontogeneia aculeata (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 616. 


En EEE WENTR 
a En: 


352 Rhachotropis 


Body rather slender, peraeon segments 1—3 dorsally a little raised 
behind, segment 7 produced to a very small dorsal tooth, pleon segments 1—3 
tricarinate, carinae ending in teeth, the central on segment 3 much smaller 
and more obtuse than the preceding, segment 4 with dorsal tooth, lateral 
ridges not produced. Head, rostrum short, lateral corners narrow triangular. 
Side-plate 1 linguiform, lower margin straight, corners not acute, 4 slightly 
emarginate, 5! and 6‘ without lateral ridge. Pleon segment 3, postero- 
lateral margins firmly serrate. Eyes rather large, rounded oval, light brown. 
Antenna 1 in O not very long, 1°* joint not as long as 24 and 34 combined, 
34 about half as long as 24, both calceoliferous, flagellum subequal to peduncle, 
12—15-jointed, calceoliferous; accessory flagellum 2-jointed. Antenna 2in oa 
little longer, ultimate and penultimate joints of pedunele subequal, fringed above 
with calceoli, together as long as flagellum of about 14 joints. Antenna 1 
in C more than twice as long as in O, flagellum at base carrying faseieles 
of sensory filaments. Antenna 2 in J rather longer, flagellum nearly twice as 
long as pedunecle. Gnathopod 1 rather strong, somewhat smaller than other- 
wise similar gnathopod 2, 6! joint oblong oval, about twice as long as 
broad, elongate palm defined by very slight spiniferous angle. Peraeopods 1—5 
more slender and with more elongate fingers than in R. aculeata (p. 348); 
peraeopods 3—5 rapidly encreasing in length, 24 joint simple, oblong oval, a 
little narrowed below, 6 joint very long in. peraeopod 5, which is about 
®/), as long as the body. Uropods 1—3, outer ramus not much shorter than 
inner, in uropod 3 both rami subfoliaceous, abruptly tapering to the apex, 
marginal spinules few. Telson unarmed, not strongly tapering till near the 
acute contiguous apices, cleft nearly to the middle. Colour semipellucid, 
whitish, blotched with light red. L. Q 12, S 10 mm. 


Arctie Oeean, North-Atlantie, North-Sea and Skagerrak (South- and West-Norway). 
Depth 94--188 m. Other localities doubtful. 


8. R. macropus V. Sars ?1874 Amphithonotus aculeatus (part.), Buchholz in: 
Zweite D. Nordpolarf., v.2 p.316 | 1882 Tritropis helleri (err., non 'A. Boeck 1871!), 
Hoek in: Niederl. Arch. Zool., suppl. 1 nr.7 p.58 | 1894 Rhachotropis h., T. Stebbing 
in: Bijdr. Dierk., v.17 p.37 | 1893 R. macropus, G. O. Sars, Urust. Norway, v.l p. 428 
t. 151 £.1. 


Very like R. helleri (p. 351), but peraeon segments not dorsally raised; 
segment 7 produced to very small tooth, pleon segments 1—3 tricarinate, carinae 
ending in teeth, central of segment 3 like the preceding, segment 4 with 
dorsal tooth, lateral ridges not produced. Pleon segment 3, postero-lateral 
margins strongly serrate, serration turning the corner. Eyes large, rounded, 
dark brown with whitish coating. Antenna 1 in Q moderately long, 1° joint 
as long as 24, 34 more than half as long as 24, both densely calceoliferous, 
flagellum searcely as long as peduncle; accessory flagellum 2-jointed. Antenna 2 
subequal, ultimate joint of peduncle longer than penultimate, flagellum not 
nearly equal the 2 joints combined. Peraeopods 1—5 much more elongated and 
slender, peraeopod 5 longer than the whole body. Uropods 1—3 and telson 
not notably differing from those of R. helleri, but telson large, extending 
beyond uropod 3, cleft to the centre, apices only subacute. Colour whitish, 
blotehed with reddish orange, patches generally less confluent than in R. helleri. 
L. © 16 mm. 


Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (Norway, depth 188—752 m; 
Barents Sea; Kara Sea; Spitzbergen.) 


Rhachotropis 353 


9. R. leucophthalma O. Sars 1893 R. L., 6.0. Sars, Crust. Norway, ol 


p.499 t. 151.2. 


Rather less slender than R. maeropus, otherwise like it in general. 


 Peraeon segments 1—7 without teeth, pleon as in R. macropus, but tooth 


of 4th segment unusually large. Head, lateral corners very narrow. Side- 


' plates as in R. macropus. Eyes quite rudimentary, represented by 2 irregular 


yellowish white patches of pigment. Antenna 1 not very long, 1° joint 


 subequal to 24, 34 more than half as long as 24, flagellum subequal to peduncle; 
 accessory flagellum 2-jointed. Antenna 2 a little longer, ultimate joint of 
- peduncle longer than penultimate, flagellum not nearly as long as both combined. 


Gnathopods 1 and 2 rather powerful, similar to those of R. macropus, as 
also peraeopods I—5, but peraeopod 5 shorter than the body. Uropods 1--3 


as in R. macropus, telson shorter, not extending beyond uropod 3, more 


tapering distally, cleft to the centre. Colour light yellowish, tinged with 
reddish orange, and pinkish on mouth-parts and gnathopods 1 and 2. 
L. © 14 mm. 


North-Atlantie, North-Sea and Skagerrak (Norway). Depth 188—752 m. 


10. R. rostrata (Bonnier) 1896 Rachotropis r., J. Bonnier in: Ann. Univ. Lyon, 
0.26 p.658 1.39 2. - 


Peraeon segments 1—7 smooth, not produced, pleon segment 1 slightly 
earinate behind, without lateral earinae, -segments 2, 3 and 4 tricarinate, 
earinae produced into teeth on segment 27 ending obtusely on segment 3, 
the central produced into a tooth on segment 4. Head, rostrum reaching 
along ?/, length of 1° joint of antenna 1, slightly deflexed, lateral corners 
produced to a truncate lobe. Side-plates of the usual form; pleon segment 3, 
postero-lateral margins eut into 10 sharp teeth. Eyes entirely wanting. Antennal 
in S, 1% joint as long as 24 and 34 combined, 24 calceoliferous, 34 less 


than half as long as 24, flagellum much longer than peduncle, with 20 joints, 


1st very long, densely elothed, accessory flagellum wanting. Antenna 2 much 
longer, ultimate and penultimate joints of peduncle subequal, calceoliferous, 
flagellum longer than peduncle, with 40 elongate joints. Maxilla 1, inner plate 
with only .1 seta, outer with 8 spines. Gnathopods 1 and 2 nearly as in 
R. helleri (p. 351), but 5*" joint with lobe apparently very little produced, 
palmar angle set with 3 strong spines. Peraeopods 1—5 slender, elongate, 
24 joint of peraeopod 5 broad proximally. Uropods 1 and 2, outer ramus 
rather the shorter; uropod 3, rami lanceolate, equal; all rami minutely spinulose. 
Telson tapering, not reaching extremity of uropod 3, carrying a pair of 
plumose cilia above the centre of lateral margins, eleft less than '/, of length. 
L. 13 mm. 


Bay of Biscay. Depth 950 m. Be 


11. R. graeilis (Bonnier) 1896 Rachotropis g., J. Bonnier in: Ann. Univ. Lyon, 
0.26 p.657 t. 39 £.3. 


Body compressed, dorsally carinate on peraeon segments 1—7 and pleon 
segments 1—4, earina produced into a small tooth only on pleon segments 1—4 
(in text: on segments 1—3), no lateral carinae. Head, rostrum very short, 
lateral angles apparently aeute, little produced. Side-plate 1 (in figure) not 
produced forward. Pleon segment 3, postero-lateral margins with only 3 
scarcely visible dentieles. Eyes wanting. Antenna 1 in JG short, 1° and 
24 joints long, equal, 32 much less than half as long as 24, flagellum shorter than 


Das Tierreich. 21. Lief.: T.R. R. Stebbing, Amphipoda I. 23 


354 Rhachotropis, Rozinante 


peduncle, accessory flagellum 2-jointed, nearly as long as‘ 1% joint of 
flagellum. Antenna 2 in adult 9 longer than the whole body, ultimate 
joint of peduncle longer than penultimate, both elongate. Upper lip, apex 
produced, narrowly rounded. Maxilla 1, inner plate with 1 seta, outer with 
9 spines. Maxillipeds with elongate palp. Gnathopods 1 and 2 as in R. inflata 
(p. 351), with which also peraeopods I—5 appear nearly to agree, but in peraeo- 
pod 5 the 5®% joint is rather longer than the 6!" instead of the reverse. Uropod 3, 
rami foliaceous, rather blunt. Telson nearly reaching extremity of uropod 3, 
tapering but slightly, ending in a very small triangular emargination. L. 
about 10 mm. 


Bay of Biscay. Depth 950 m. 


6. Gen. Rozinante Stebb. 


1871 Tritropis (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.158 | 1894 
Rozinante (Sp. typ.: R. fragilis), T. Stebbing in: Bijdr. Dierk., v.17 p.38 | 1899 R.. 
T. Seott in: J. Linn. Soc., v.27 p. 77. 


Front part of pleon carinate. Head minutely rostrate. Side-plates 
small, 1° narrowly produced forward. Pleon segment 3, postero-lateral margins 
denticulate. Antennae 1 and 2 sexually varying in length. Antenna 1 shorter 
than antenna 2, without accessory- flagellum. Upper lip slightly emarginate. 
Mandible, eutting edge dentate, accessory plate on both mandibles, many 
spines in spine-row, molar prominent, 34 joint of palp not longer than 24, 
Maxilla 1, inner plate with 4 setae, outer with 11 spines, 24 joint of palp distally 
widened, fringed with numerous spines. Maxilla 2, plates moderately long. 
Maxillipeds, inner and outer plates moderately long, finger of palp attached 
below the abruptly narrowed apex of 34 joint. Gnathopods 1 and 2 subchelate, 
5th joint elongate, unlobed, 6% narrow, finger short. Peraeopods 1—5 slender, 
5th the longest. Uropod 3 reaching much beyond the others, rami long, 
lanceolate, subequal, spinulose. Telson short, partially cleft. 


l species. . 


1. R. fragilis (Go&s) 1866 Paramphithoe f., Go&s in: Öfv. Ak. Förh., v.22 p.524 
t.39 f.16 | 1871 Tritropis f., A. Boeck in: Forh. Selsk. Christian., 1870 p.160 | 1874 
T. f., Buchholz in: Zweite D. Nordpolarf., v.2 p. 320 Crust. t.3 f.1-| 1876 T. f., 
A. Boeck, Skand: Arkt. Amphip., v.2 p.515 | 1888 Rhachotropis f., T. Stebbing in: Rep. 
Voy. Challenger, v.29 p. 356 | 1894 Rozinante f., T. Stebbing in: Bijdr. Dierk., v.17 p.39 | 
1899 R. f., T. Scott in: J. Linn. Soc., v.27 p.77 | 1893 Pontogeneia aculeata (part.)?, 
A. Della Valle in: F. Fl. Neapel, v.20 p.617. 


Pleon segments 1—3 obtusely tricarinate, carinae not produced into 
dorsal teeth, but notched at end of lateral keels. Head, lateral corners 
slightly produced, obtuse, post-antennal corners very acutely produced, 
with serrate upper margin. Side-plates 5—7 serrate on hind margin. Pleon 
segment 2, postero-lateral corners a little acutely produced, segment 3 
rotundo-quadrate, postero-lateral margins of segments 1—3 finely serrate 
(or strongly, Buchholz). Eyes large, subglobose or subreniform, black. Antennal, 
18 joint longer than 24 and 34 combined, all with apical teeth, 24 joint 
only sometimes longer than 34, flagellum thrice as long as pedunele, of 
many short joints. Antenna 2, ultimate joint of peduncle as long as apically 
dentate penultimate, flagellum much longer than peduncle. Gnathopods 1 
and 2, 5tk joint as long as or rather longer than 6!%, widened a little distally, 


Rozinante, Bateidae, Batea 355 


6% joint two and a half times as long as broad, widening slightly to the 
not very oblique palm, which is overlapped by the denticulate finger. Peraeo- 
pods 3—5;, 24 joint narrowed distally, serrate on hind margin, finger long, 
slender. Uropods 1 and 2, outer ramus much shorter than inner, neither 
very long. Uropod 3; outer ramus very little shorter than inner. Telson 
about once and a half as long as broad, eleft from '/;—'/, of length, lateral 
margins serrate and also obtuse apices. Colour pale reddish yellow, with 
faint red markings. L. reaching 22°5 mm. 


: Arctie Ocean (Greenland; Spitzbergen; Cape Wynn, depth 6 m; Barents Sea, 
depth 372 m). ; 


28. Fam. Bateidae 


Head strongly rostrate. Side-plate 1 rudimentary. Antenna 1 without 
accessory flagellum. Mandible with palp. Gmnathopod 1 degraded, without 
hand. Telson cleft. 


Marine. 


Zu 
En 
Be 
Br: 
z 
# 
. 


1 genus, 1 species. 
1. Gen. Batea Fr. Müll. 


= 1865 Batea (Sp. un.: B. catharinensis), Fritz Müller in: Ann. nat. Hist., ser. 3 
Be 16 p.276. 

3 Body not dentate. Side-plate 4 rather large and deeply excavate behind. 
Antenna 1 little shorter than antenna 2. Maxillipeds, outer plates fully 
reaching apex of palp’s 24 joint, fringed with spine-teeth on inner margin. 
Gnathopod 1 degraded, ending with a feeble linear 24 joint, which is longer 
in the o than in the d. Gnathopod 2 subchelate. Peraeopods 3—5, 24 joint 
 expanded. Uropod 2 shorter than uropod 1 or 3; uropod 3, peduncle short, 
_  rami subfoliaceous. Telson rather short, deeply cleft. 


1 species. 


1. B. catharinensis Fr. Müll. 1865 B. c., Fritz Müller in: Ann. nat. Hist., 
ser.3 v.15 p. 276 t.10. 


Segment 7 of peraeon much the longest. Head, rostrum (in figure) nearly 
as long as 1° joint of antenna 1, very blunt. Pleon segment 3, postero- 
lateral eorners subquadrate, seemingly with spinules on the straight part 
of hind margin. Eyes large, dark, reniform, larger in C’ than in Q. Antennael 
and 2 longer in S than in Q. Antenna 1, 24 joint narrower and a little 
shorter than 1°, flagellum many-jointed, setae of alternate joints direeted 
downward in Q, backward in d. Antenna 2, ultimate and penultimate 
joints of pedunele subequal, with fascieles of hairs on upper side, but only 

ind, flagellum many-jointed, with long upward directed setae on alternate 
joints, but only inO. Gnathopod 1 with more hairs in O than in d. Gnathopod 2, 
5th joint shorter than 6tk, distally widened, 6tk oval, palm subequal to hind 
margin, defined, but not very sharply. Peraeopods 1 and 2 with long hairs 
on hind margin of 5tt and 6!" joints, but only in d. Uropod 1, peduncle 
much longer than rami; uropod 2, peduncle little longer than rami; uropod 3, 


238% 


356 Batea, Pontogeneiidae, Eurymera 


rami subequal in length, one stouter, both fringed with plumose setae. 
Telson with rounded apices. L.? 


South-Atlantie (Desterro [Brazil]). 


29. Fam. Pontogeneiidae 


Body eompressed, with or without dorsal teeth. Head, rostrum un- 
important. Side-plates 1—4 rounded. Antenna 1, peduncle not elongate, 
accessory flagellum usually wanting, 1-jointed when present. Upper lip rounded. 
Lower lip with inner lobes weakly developed or wanting. Mouth-parts in 
general normal. Gmathopods 1 and 2, hands not powerful, subchelate. 
Uropod 3, rami subequal, of moderate size. Telson deeply cleft. 


Marine. 
7 genera, 9 accepted species, 4 obscure. 


Synopsis of genera: 
n | Antenna 1 without accessory flagellum — 2. 
Antenna 1 with accessory flagellum — 6. 
| Body veryrobust, middle side-plates verydeep—.3. 
2 2 Body not very robust, middle side-plates not 


) very deep — 4. 
3 | Inep0od'8 very shert 5:25 l. Gen. Eurymera . . . p.356 
Uropod 2 Dos anorl, #28. Wer 2. Gen. Bovallia. . . . p.357 
A { Antenna 1 longer than antenna 2... ... 3. Gen. Stebbingia. . . p.358 
Antenna 1 shorter than antenna 2 — 5. 
Peraeopods 3—5, 4th joint and finger normal 4. Gen. Pontogeneia . . p.359 
5 | Peraeopods 3—5, 4th joint much dilated, finger 
with membranous cap .. ....».., 5. Gen. Zaramilla . . . p.361 
6 j Antenna 1 longer than antenna 2 ..... 6 Gen. Atyloides . . . p.362 
\ Antenna 1 not longer than antenna 2... .. 7. Gen. Paramoera . . p.863 


1. Gen. Eurymera Pfeff. 


1888 Eurymera (Sp. un.: E. monticulosa), Pfeffer in: Jahrb. Hamburg. Anst., 
v.5 p. 102. 


Peraeon dorsally broad. Head not rostrate. Side-plates 1—4 very 
large, 4" emarginate. Antennae 1 and 2 short; no aecessory flagellum. 
Upper lip rounded. Lower lip not known. Mandible normal, well deve- 
loped. Maxilla 1, inner plate with ‘many setae, outer with 9 spines (P), 
24 joint of palp broad, with many spines. Maxilla 2, inner plate rather 


the smaller, strongly fringed ‘on inner margin. Maxillipeds, outer plates not 


reaching apex of palp’s 29 joint, fringed with spine-teeth on inner and setae 
on apical margin, palp not very long, finger acute, with setules on inner 
margin. Gnathopods 1 and 2 feeble, slender, subchelate, 5 and 6" joints 


nearly equal in length. Peraeopods 1—5, 4 joint not especially dilated, 


but, especially in 3d—5tk pairs, 4 and 5th joints distally produced; finger 
seemingly in all short, eurved. Uropods 1—3, outer ramus shorter than 
inner; uropod 3 seemingly very short. Telson deeply cleft. 


1 species. 


Eurymera, Bovallia 357 
1. E. monticulosa Pfeff. 1888 E. m., Pfeffer in: Jahrb. Hamburg. Anst., v,5 
p.103 t.1 £.3. 


Back extremely broad at peraeon segments 4 and 5, hinder part of 
pleon compressed, peraeon and pleon segments 1—3 with transverse dorsal 
ridges and longitudinal lateral tubereular elevations. Head, lateral corners 
weakly convex, defined below by a small sharp ineision, post-antennal 
eorners strongly produced, obtusely acuminate. Pleon segment 3, postero- 
lateral corners rounded quadrangular. Eyes small, reniform, very bright. 
- Antenna 1, 1° joint as long as 24 and 34 combined, flagellum rather longer than 
peduncle, with about 34 short joints, the alternate distally outdrawn. Antenna 2 
subequal to antenna 1, ultimate joint of peduncle shorter than penultimate, 
both distally outdrawn into several lobes, flagellum a little longer than peduncle, 
1° joint as long as the next 3 combined. Mandible. spine-row of about 
12 simple spines, 24 joint of palp rather longer than 3%. Maxilla 1, inner 
plate with more than 20 plumose setae, 24 joint of palp twice the length 
of 1°, fringed with many setae and spine-teeth. Gmnathopod 1, 5" joint 
twice as long as broad, subequal to 6%, which widens a little distally, the 
palm small, defined by an obtuse angle. Gnathopod 2 similar, but 5% joint 
more than twice as long as broad and 6% not widening distally; finger 
_ small in both gnathopods. Peraeopods 3—5, 24 joint well expanded, 5th 
joint (in figure) shorter than 6". Telson not quite twice As long as broad, 
-  triangular oval, cleft for ?/, of length, the lobes not dehiscent, their apices 
; rounded. L. 27 mm. 


South-Atlantie (South Georgia). 


2. Gen. Bovallia Pfeff. 
E 1888 Bovallia (Sp. un.: B. gigantea), Pfeffer in: Jahrb. Hamburg. Anst., v.5 p.9. 


Some of the segments carinate and elevated. Head, rostrum small. 
- Side-plates 1—4 very large, not setiferous. Antennae 1 and 2 not elongate, 
antenna 1 with strong peduncle, no accessory flagellum. Upper lip semi- 
oval, outdrawn to a little point. Mandible normal, well developed. Maxillal, 
inner plate with many setae, outer with about 10 spines, 24 joint of palp 
- with many slender spines. -Maxilla 2, inner plate rather the broader, fringed 
; on inner margin. Maxillipeds strongly developed, outer plates closely fringed 
on inner margin with short spine-teeth, finger of palp acute, almost concealed 
MR among setae of 34 joint. Gmathopods 1 and 2 similar, moderately large, 
E ee, 5th joint cup-shaped, 6!" oval, finger strong. Peraeopods 1 and 
2 slender. Peraeopods 3—5, 24 joint long oval, laminar, the rest slender. 
Uropods 1 and 2, outer ramus the shorter; uropod 3, rami equal, elongate, 
laneeolate. Telson slender, eleft to the middle. 


1 species. 


ıe B. gigantea Pfeff. 1888 B. g., Pfeffer in: Jahrb. Hamburg. Anst., v.5 
p-9%6 t.1 £.5. 


2 Body thick and rather RN peraeon segments 1—5 dorsally rounded, 
6th and 7th and pleon segments 1—3 carinate, each produced to a dorsal 
Bi tooth, large in the last four, pleon segment 4 with deep dorsal depression. 
Head, rostrum a small triangular deflexed tooth, lateral eorners quadrate, 
little produced. Side-plates 1—4 rectangular with corners slightly rounded, 


358 Bovallia, Stebbingia 


4th much the largest, strongly emarginate. Pleon segment 3, postero-lateral 
corners subquadrate. Eyes very large, narrowly reniform, with narrow interval 
at top of head. Antenna 1, 1° joint as long as 24 and 34 combined, strong, 
1st and 24 serrately carinate below, 34 serrate, flagellum rather longer than 
peduncle, joints except 1° small, the alternate distally outdrawn and in Q 
calceoliferous. Antenna 2 scarcely as long as antenna 1, ultimate joint of 
peduncle about ?/, as long as penultimate, flagellum as long as peduncle, similar 
to flagellum of antenna 1. Gmathopod 1, lobe of 5th joint rounded, 6tk rather 
longer than 5%, broad, palm ill-defined, oblique, convex, finger slender, 
strongly bent, with dark chitinized point. Gnathopod 2, 6tk joint apparently 
rather slighter than in gnathopod 1, palm straighter and rather better defined. 
Peraeopod 5 a little longer than peraeopod 4, considerably longer than 
peraeopod 3, 24 joint with hind margin straighter than in peraeopods 3 and 4. 
Colour orange- to purple-red. L. 45 mm. 


South-Atlantie (South Georgia). 


3. Gen. Stebbingia Pfeff. 


1888 Stebbingia (Sp. un.: 8. gregaria), Pfeffer in: Jahrb. Hamburg. Anst., 
v.5 p. 110. 


Body slender, not carinate or dentate. Head scarcely rostrate. Side- 
plates 1—4 moderately large. Antenna 1 rather the longer, without accessory 
flagellum. Lower lip without inner lobes. - Mandible normal. Maxilla 1, 
inner plate with several (about 9) setae, outer with spines close-set, outer 
corner of 1° joint of palp somewhat outdrawn. Maxilla 2, inner plate rather 
shorter and broader than outer. Maxillipeds well developed, outer plates 
fringed on inner margin with short spine-teeth, finger of palp narrow and 
rather feeble. Gnathopods 1 and 2 subchelate, similar, but 1° much weaker 
than 24. Peraeopods 1 and 2 slender; peraeopods 3—5 rather stouter, 
24 joint not greatly widened, the lower hind corner narrowly rounded. In 
uropod 1 outer ramus scarcely, in uropod 2 much, in uropod 3 not, shorter 
than inner. Telson cleft to the centre. 


1 species. 


1. S. gregaria Pfeff. 1888 S. g., Pfeffer in: Jahrb. Hamburg. Anst., &.5 
p- 110 t.2 £.7 | 1893 Pontogeneia g., A. Della Valle in: F. Fl. Neapel, v.20 p. 904. 


Head, rostrum obsolete, lateral corners feebly convex. Side-plates 1—3 
directed slightly forward, rounded below, 4!" much broader, also rounded 
below, emarginate behind. Pleon segment 3, postero-lateral corners obtusely 
quadrate. Eyes large, broadly reniform, narrowly separate above. Antenna l, 
18t joint rather strong, but not as long as the much narrower 24 and 3% combined, 
flagellum considerably longer than peduncle, with 56 joints, the proximal ones, 
except the 1°, shorter than broad, alternate joints distally outdrawn. Antenna 2 
shorter, ultimate and penultimate joints of peduncle subequal, flagellum 
about 46-jointed, alternately calceoliferous. Mandible, spines of the spine- 
row are described as short, curved, hyaline, and unfeathered, the palp and 
also maxilla 1 are said to resemble those of Bovallia gigantea (p. 357). Gnatho- 
pod 1, 5th joint seemingly quadrate, 6b oval, palm moderately oblique, defined 
by an obtuse angle, finger curved, rather shorter than the palm. Gmnatho- 
pod 2, 5th joint eup-shaped but not very short, 6% longer, said to be similar 
in structure to that of gnathopod 1, though very much larger and differently 
figured, with a much more oblique and less defined palm. Uropods 1—3, 

/ 


Lam we - TOWER A ” ee 


Stebbingia, Pontogeneia 359 


rami spinulose. Uropod 3, rami equal, lanceolate, acute. Telson about ?/, 
as broad as long, very little tapering, cleft to the centre, the lobes gradually 
dehiscent, with truncate notched apices. Colour dull green. L. 17 mm. 


South-Atlantie (South Georgia). Under stones, at low tide. 


4. Gen. Pontogeneia Boeck 


1871 Pontogeneia (Sp. un.: P. inermis), A. Boeck in: Forh. Selsk. Christian., 
1870 p.193 | 1876 P., A. Boeck, Skand. Arkt. Amphip., v.2 p.334 | 1893 P., G. O.Sars, 
Crust. Norway, v.1 p.451 | 1895 P. (part.), A. Della Valle in: F. Fl. Neapel, v.20 
p.615 | 1873 Pontogenia (non Claparede 1868, Polychaeta!), E. v. Martens in: Zool. 
Ree., v.8 p.190 | 1888 Atylopsis (part.), T. Stebbing in: Rep. Voy. Challenger, v.29 p. 924. 


Body without dorsal teeth. Head, rostrum small or obsolete, post- 
antennal corners produced. Side-plates not very large, 4! emarginate. 
Antennae 1 and 2 in J calceoliferous and longer than in ©, antenna 1 
the shorter, without accessory flagellum. Upper lip rounded or slightly 
emarginate. Lower lip with small inner lobes. Mandible normal, palp strong. 
Maxilla 1 with about 6 setae on inner plate, 11 spines on outer, 24 joint 
of palp large. Maxilla 2, inner plate fringed on inner margin. Maxillipeds, 
outer plates not reaching end of palp’s 24 joint, apically fringed with slender 
spines, 34 joint of palp produced over base of finger. Gnathopods 1 and 2 
similar, feeble, subchelate, palm shorter than hind margin of 6% joint. Peraeo- 
pods 3—5, 24 joint well expanded, the remaining joints normally slender. 
Uropod 3, pedunele short. Telson deeply cleft. 


8 species accepted, 3 doubtful. 


Synopsis of accepted species: 


Gnathopod 2, 5th joint longer than 6th ..... 1. P.inermis . . . p.359 
Gnathopod 2, 6th joint longer than 5th — 2. 

Apices of telson serrate -. -..... 2.2... 2. P. magellanica . p. 360 
Apices of telson smooth . . 2»... . Je... 8. 2. dansi . . „x. D.800 


1. P. inermis (Kröyer) ?1780 Oniscus abyssinus, O. Fabrieius, Fauna Groenl., 
p: 261 | 1838 Amphithoe inermis (2) + A. erenulata (3), (Reinhardt in MS.) Kröyer in: 
Danske Selsk. Afh., v.7 p.275 t.3 f.11la—g; p.278 t.3 f.12a—g | 1862. Atylusi. + 
A. crenulatus, Bate, Oat. Amphip. Brit. Mus., p.138 t.26 f.5; p.139 t.26 f.6 | 1866 
Paramphithoe i., Goes in: Öfv. Ak. Förh., v.22 p.524 | 1874 P. i., Buchholz in: Zweite 
D. Nordpolarf., v.2 p.366 | 1871 Pontogeneia i., A. Boeck in: Forh. Selsk. Christian., 
1870 p.194 | 1876 P.i., A. Boeck, Skand. Arkt. Amphip., v.2 p.385 t.21 f.4 | 1893 
P.i., 6.0. Sars, Crust. Norway, v.1 p.451 1.159 | 1893 P.i., A. Della Valle in: F. Fl. 
Neapel, v.20 p. 617 t.59 f. 2». 


Back evenly rounded. Head, rostrum very small, lateral corners obtusely 
rounded, separated by an angular incision from th@ triangular post-antennal 
lobes. Side-plates 1—3 rounded quadrangular, lower margin minutely erenulate, 
4'h considerably larger. Pleon segment 3, postero-lateral corners scarcely 
produced, lateral margin bulging above abruptly. Eyes oblong reniform, 
light red. Antenna 1, 1° joint not much longer than 24, 24 twice as long 
as 34, 34 a little produced at apex, flagellum about twice as long as peduncle, 


.many-jointed. Antenna 2, ultimate and penultimate joints of peduncle sub- 


equal, flagellum about twice as long as peduncle. Antennae 1 and 2 in C 
with large calceoli on confronting edges of ultimate and penultimate joints 
of peduncle, but none on the long slender flagella. Maxillipeds, outer plates 
fringed with spines on inner margin. Gnathopods 1 and 2, 5th joint slender, 


860 Pontogeneia 


longer than 6", 6b slightly widening distally, palm somewhat oblique, 
slightly defined, finger small; 6t% joint rather more widened distally in 
gnathopod 2 than in gnathopod 1, with the palm rather less oblique and 
therefore better defined. Peraeopods 3—5, 24 joint rounded oval with hind 
margin smooth, that of peraeopod 5 much the largest. Uropod 2, outer 
ramus much shorter than inner; uropod 3, rami subequal, lanceolate, about 
twice as long as peduncle, fringed with spinules and setae. Telson oblong 
oval, cleft beyond the middle, lobes rather dehiscent, obtusely pointed. Trans- 
parent, colourless. L. 9 12 mm, S somewhat less. 


Arctie Ocean and North-Sea (Greenland, Siberia, West-Norway). 


2. P. magellanica (Stebb.) 1888 Atylopsis magellanicus, T. Stebbing i in: Rep. R 
Voy. Challenger, v.29 p.925 t.79 | 1893 en A. Della Valle in: F. Fl. Neapel, 
v.20 p. 701. 


Head angular in front, not rostrate. Side-plate 1 distally widened, 
4th much the widest. Pleon segment 3, postero-lateral angles acutely upturned, 
and lateral margin bulging above a small sinus. Eyes rather large, reniform. - 
Antenna 1, 1° joint rather longer than 24, remainder, and all but the basal 
joints of antenna 2, unknown. Upper lip slightly emarginate, so as to be 
unequally bilobed. Maxillipeds, outer plates fringed with submarginal spinules. 
Mouth-parts otherwise agreeing well with P. inermis (p. 359). Gnathopod 1, 
5th joint as long as 6, 6 more than twice as long as broad, palın only slightly 
oblique, defined by a group of spines at the obtuse angle, finger small, 
curved, denticulate on inner margin. Gmnathopod 2 rather similar but longer, 
5th joint not so long as 6th, which is rather widened distally. Peraeopods 3—5 
nearly as in P.inermis, but hind margin of 29 joint slightly serrate. Uropod 3, 
peduncle shorter than one of the rami, the other ramus unknown. Telson 
not longer than peduncle of uropod 3, not much longer than broad, cleft 
for about °/, of length, lobes a little dehiscent near the broad apices, which 
form 3 denticles on their slope from the lateral margins. L. about 7 mm. 


Strait of Magellan (Cape Virgins). Depth 100 m. 


3. P. danai (G. M. Thoms.) 1879 Atylus dania, A. danai, G. M. Thomson in: 
Tr. N. Zealand Inst., v. 11 p.238, 248 t.10 f.C 1 | 1879 A. danai, G. M. Thomson in: 
Ann. nat. Hist., ser.5.v.4 p.330 | 1898 A. d., A. Della Valle in: F. Fl. Neapel, v.20 p. 708. 


Head with short rostrum, post-antennal corners blunt, little produced. 
Eyes large, round, black. Antenna 1. about ’/, shorter than antenna 2, 
joints of peduncle short, dentate on lower margin, flagellum with more than 
25 joints, every 39 or 4% produced to a setose tuberele. Antenna 2, ultimate 
and penultimate joints of pedunele rather short, equal, flagellum 40 —50-jointed. 
Side-plates, mouth-parts and peraeopods apparently in very close agreement 
with those of P. magellanica, and gnathopods 1 and 2 not very. different, 
but with palm imperfectly defined and finger smooth. Also gnathopod 1, 
at least in Q, has the 6!" joint larger and more ovate than that of gnatho- 
pod 2. Uropods 1 and 2, peduncle longer than rami, outer ramus shorter 
than inner. Uropod 3, rami about twice as long as peduncle, thickly studded with 
short spines and fringed with long cilia, probably in both sexes, certainly 
in 9. Telson cleft to nearly half its length, apices rounded, smooth, with 
a spinule somewhat remote from them on each side. Colour semi-transparent, 
with dark bluish spots. L. 7°5 mm. 


South-Paeifie (Dunedin [New Zealand]. Rock pools. 


561 


Pontogeneia, Zaramilla 


BE . P. eapensis (Dana) 1853 &,55 Iphimedia e., J.D. Dans in: U. $. expl. Exp., 
130 p.981t.63 f.5a—g | 1862 Atylus c., Bate, Cat. Amphip. Brit. Mus., p.141 1.27 £.4. 
u: Possibly identical with P. magellanica. L. 8 mm. 
= Near to Cape of Good Hope. 


e - P. fissieauda (Dana) 1852 Amphithoe f., J. D. Dana in: P. Amer. Ac., v2 
 p.21l4 | 1853 & 55 Iphimedia f., J.D. Dana in: U. S. expl. Exp., v. 13m p.929 t.68 
f.4 | 1862 Atylus f., Bate, Cat. Amphip. Brit. Mus., p. 141 t.27 £.3. 


South-Paeifie (north of Valparaiso). 


P. tasmaniae (G. M. Thoms.) 1893 Atyloides t., G. M. Thomson in: P. R. Soc. 
Tasmania, 1892 p.21 1.2 £.9—15; t.3 f. 1,2. 
E L. 7 mm. 


Pirates Bay [Tasmania]. Rock pools. 


5. Gen. Zaramilla Stebb. 


| 1888 Zaramilla (Sp. un.: Z. kergueleni), T. Stebbing in: Rep. Voy. Challenger, 
©.29 p.866 | 1890 Zaramella, Beddard in: Zool. Rec., v.25 Index p. 17. 


Back round, not dentate. Head not rostrate. Side-plates 1—4 not 
very large, setiferous. Antennae 1 and 2 short; no accessory flagellum. 
Upper lip rounded. Lower lip, inner lobes not sharply separated from 
outer. Mandible normal, well developed. Maxilla 1, inner plate with many 
 setae, outer with 9 spines, 24 joint of palp large. Maxilla 2, inner plate 
rather the smaller, strongly fringed on inner margin. Maxillipeds, outer 
 plates not nearly reaching apex of palp’s 29 joint, fringed with spine-teeth 

on inner margin and setae on apical, finger slender, with a sharp nail. 

Gnathopods 1 and 2 feeble, slender, subchelate, 5! and 6t% joints nearly 
equal in length. Peraeopods 1—5 setose, 4" joint long, dilated, especially 
in 39 —5{h pairs, finger very short in 1° and 24, long in 34—5th, in all 
with a membranous cap over the nail. Uropod 3, rami subequal, lanceolate. 
Telson not long, deeply cleft. 


l species. 


TNEREN 


1. Z. kergueleni Stebb. 1888 Z. k., T. Stebbing in: Rep. Voy. Challenger, 
0.29 p.867 t. 66. 


.. 


E Head, lateral corners rounded, little produced. Side-plates 1—4 rounded 
- below; 4" much wider than 1°, 2X or 3%, emarginate above. Pleon segment 3, 
- _ postero-lateral corners quadrate. Eyes large, nearly meeting at top of head, 
= oval, dark. Antenna 1, 24 joint a little shorter than 1°, and 34 than 24, 
 flagellum as long as pedunele, with 12 joints, some in G with caleceoli. 
3 Antenna 2 a little longer, ultimate joint of peduncle sligehtly longer than 
- penultimate, flagellum subequal to pedunele, with 14 unequal joints, the longer 
; more expanded distally and in G with ealceoli. Mandibles, on the left both 
plates strongly dentate, on the right accessory plate denticulate; spine-row, 
L molar and palp strongly developed. Gmathopod 1, 5th joint in the Cd a 
2 little shorter, in the © a little longer than the 6; 6th oblong oval, palm 
= oblique, erenulate, defined by a group of spines, finger not long. Gnatho- 
3 pod 2, 5tk joint in J considerably, in © a little, shorter than 6*h, otherwise 
= nearly as in gnathopod 1. Peraeopods 1 and 2, 4tk joint broader and much 


3 

e 

S 
Re 
Fi 


longer than 5tk, 5th broader and a little longer than 6%, Peraeopods 3—5, 
24 joint broadly oval, hind margin serrulate, 4 subequal in length to 24, 


362 Zaramilla, Atyloides 


much broader than 5t%, somewhat decurrent behind, 5tk Jonger and much 
broader than 6%, which is subequal to the tapering, minutely pectinate 
finger. Uropod 1, rami equal, rather shorter than peduncle; uropod 2 shorter 
and stouter, outer ramus shorter than inner; uropod 3, peduncle much shorter 
than rami, outer ramus more slender, scarcely shorter than inner, both 
spinulose. Telson once and a half as long as broad, cleft ®/, of length, with 
3 pairs of dorsal spinules, apices acute, slightly divergent. L. O0 9 mm. 


Southern Indian Ocean (Kerguelen Island). At the surface. 


6. Gen. Atyloides Stebb. 
1888 Atyloides (part.), T. Stebbing in: Rep. Voy. Challenger, v.29 p. 913. 


Body not carinate or dentate. Side-plates I—4 rather deep, 4! emarginate 
behind. Antenna 1 longer than antenna 2, with 1-jointed accessory flagellum. 
Upper lip rounded, lower lip without inner lobes. Mandible normal, 34 joint 
of palp distally widened, not as long as 24. Maxilla 1, inner plate with 
many setae, outer with 11 spines, 24 joint of palp with many spine-teeth. 
Maxilla 2, inner plate fringed on inner margin. Maxillipeds, inner plates 
rather long, outer not reaching end of palp’s 24 joint, fringed with spine- 
teeth on inner margin. Gnathopods 1 and 2 slender, unequal, 5" joint 
elongate, 6% joint with parallel margins and very short palm. Peraeopods 3—5, 
24 joint oval. Branchial vesicles simple. Uropods 1 and 2, outer ramus 
rather shorter than inner; uropod 3, rami lanceolate, subequal. Telson 
deeply cleft. 


1 species. 


1. A. serraticauda Stebb. 1888 A.s., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.920 1.78 | 1895 Atylus s., A. Della Valle in: F. Fl. Neapel, v.20 p. 702. 


Body with downy surface. Head, rostral projection minute, lateral 
margins subtruncate, post-antennal corners not produced. Side-plate 5, 
hind lobe scarcely deeper than front. Pleon segment 3, postero-lateral corners 
bidentate, the upper tooth the larger. Eyes large, reniform, nearly meeting 
at top of head, retaining colour in spirit. Antenna 1 of ?/, length of body, 
1° joint longer than 24 and 34 combined, 24 twice as long as 34, flagellum 
5 times as long as peduncle, with more than 62 joints. Antenna 2 much shorter, 
ultimate joint of peduncle a little longer than penultimate, flagellum more than 
twice as long as peduncle, with 34 joints, 1° longest. Gnathopod 1, 5tk 
Joint much longer than 6%, both fringed with varied spines, 6!" joint about 
thrice as long as broad, palm convex, slightly oblique, finger not reaching 
beyond it. Gnathopod 2 similar, but much longer, 5!" and 6!" joints equal, 
6 5 times as long as broad. Peraeopods 1 and 2, 4 and ‚stk joints 
equal, rather longer than 5t", all spinose, finger short, curved. Marsupial 
plates very large in gnathopod 2 and peraeopod 1, smaller in peraeopod 2, 
‚and small in peraeopod 3. Peraeopods 3—5, 4" joint rather produced behind. 
Uropod 3, rami about once and a half as long as peduncle, serrate on inner 
margin, with spines on both margins, apices acute, inner ramus with pectinate 
inner margin. Telson longer than peduncle of uropod 3, longer than broad» 
only slightly tapering, cleft ®/, of length, the broad inward-sloping apices 
each cut into 5 teeth. L. about 8 mm. 


Port Phillip (Melbourne [southern Australia]). Depth 60 m. 


E 
= 
2 
4 
E; 
B 
F 
E 
3 
Mi: 
Ri; 
z 
| 
E 
E 


Paramoera 363 


7. Gen. Paramoera Miers 


1875 Paramoera (part.), Miers in: Ann. nat. Hist., ser. 4 v.16 p.75 | 1882 Para- 
mera, (Miers in:) Scudder, Nomenel. zool., suppl. L. p.247 | 1888 Atyloides (part.), 
T. Stebbing in: Rep. Voy. Challenger, v.29 p. 913. 


Body not carinate or dentate. Pleon segments 5 and 6 not 


 coalesced. Side-plates I—4 of moderate size, 4 emarginate behind, 5th 


with hind lobe the deeper. Antenna 1 not longer than antenna 2, with 
1-jointed accessory flagellum. Upper lip rounded. Mandible normal, but 
34 joint of palp as long as 24. Maxilla 1, inner plate with many setae, 
outer with 11 strong dentieulate spines, 24 joint of palp with many spine- 
teeth. Maxilla 2, inner plate fringed on inner margin. Maxillipeds, inner 
plates rather large, outer not reaching apex of palp’s 24 joint, fringed on 
inner margin with spine-teeth. Gnathopods 1 and 2, 5tk joint shorter than 
6th, especially in S, 6tk joint oblong, much wider in J than in oO, palm 
not very oblique, well defined. Peraeopods 1—5, 5tk joint shorter than 6tk, 
finger small. Branchial vesicles simple. Uropods 1 and 2, outer ramus 
the shorter; uropod 3, rami long, lanceolate, subequal, reaching back as far 
as the 1%. Telson deeply cleft. 


l species accepted. 1 obscure. 


1. P. austrina (Bate) 1862 Atylus austrinus, Bate, Cat. Amphip. Brit. Mus., 


2.137 t.26 f.4 | 1893 A.a., A. Della Valle in: F. Fl. Neapel, v.20 p.702 | 1875 Para- 


moera australis, Miers in: Ann. nat. Hist., ser. 4 v.16 p.75 | 1875 Atylus a., Miers in: 
Ann. nat. Hist., ser.4 v.16 p.117 | 1879 A.a., Miers in: Phil. Tr., v. 168 p. 208 t.11 
£.5,5a—g | 1880 A. megalophthalmus, Haswell in: P. Linn. Soc. N.S. Wales, v.5 p. 102 
t.6 f.4 | ?1885 A. m., Chilton in: P. Linn. Soc. N.S. Wales, v.9 p. 1037 | 1888 Atyloides 
australis + A. assimilis, T. Stebbing in: Rep. Voy. Challenger, v.29 p. 914 t. 75, 76; 
p- 918 t. 77. 


Body rather compressed. Head, rostrum obsolete (Chilton: about */, 
as long as 1° joint of antenna 1), lateral margins inconspicuously bilobed, 
post-antennal corners not produced. Pleon segment 3, postero-lateral 
corners rounded, segments 1—3 dorsaily microscopically scabrous. Eyes rather 
large, reniform, black. Antenna 1, 1% joint as long as 24 and 34 combined, 
flagellum tapering, with 16—55 joints, alternate joints widening at apex, accessory 
flagellum (Miers: not existing) consisting of 1 joint shorter than 1°t of primary, 
tipped with 2 setae. Antenna 2 scarcely longer (length variable, Haswell), 
ultimate and penultimate joints of peduncle subequal, flagellum 20—56- 
jointed. Gnathopods 1 and 2, 5tk joint in young and © not greatly 
shorter than the narrowly oblong 6%, in the d much shorter, while the 
6% joint is much wider; both these joints in gnathopod 2 are longer than 
in gnathopod 1, without being wider; the palm is_short, slightly oblique, 
well defined by palmar spines. Peraeopods 3—5, 24 joint oval, widest on 
the last pair. Uropod 3, rami more than twice as long as peduncle, acute, 
with spines on each margin. Telson longer than peduncle of uropod 3, 
about ?/, as broad as long, cleft °/, of length, tapering, with a spinule in 
each bidentate apex (Chilton: oblong, eleft about to middle, apices rounded 
on outer margin). L. reaching 17 mm. : 

Southern Indian Ocean (Kerguelen Island, rocky beaches and surface to 45 m; 
Cape Agulhas, from screw of Challenger); South-Paeifie (Sydney, Port Jackson). 


P.simplex (Dana) 1852 Amphitoe (Iphimedia) s., J. D. Dana in: P. Amer. 
Ac., v.2 p.217 | 1893 A.(I.) s., A. Della Valle in: F. Fl. Neapel, v.20 p.585 | 1853 & 55 


364 Paramoera, Gammaridae 


I. s., J. D. Dana in: U. S. expl. Exp., v.13u p.927 t.63 f.2a—i | 1862 Atylus s., Bate, 
Cat. Amphip. Brit. Mus., p.140 t.27 f.2 | 1880 A. microdeuteropus, Haswell in: P. Linn, 
Soe, N.S. Wales, v.5 p.102 t.6 £.2. 

Substantially agreeing and probably identieal with P. austrina.. L. 6—10 mm. 


South-Atlantie (Hermit Island); South-Pacific (Port Jackson, Botany Bay). 


30. Fam. Gammaridae 


1813/14 Gammaridae (part.), Leach in: Edinb. Ene., v.7 p.432 | 1882 @., 6. O. 
Sars in: Forh. Selsk. Christian., nr. 18 p.28 | 1888 @., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.1004 | 1894 G@., G. ©. Sars, Crust. Norway, v.1 p.481 | 1871 & 76 
Subfam. Gammarinae, A. Boeck, Skand. Arkt. Amphip., e.1 p.74; 0.2 p.362 | 1874 
„Gammariden“, B. Dybowsky in: Horae Soe. ent. Ross., v. 10 suppl. p.6 | 1893 Gammaridi 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 620. 


Body (Fig. 84, 85, 89) more or less slender, pleon segments 4—6 usually 
well defined. Antennae (Fig. 86) generally rather slender, and, as a rule, but 
little different in the two sexes; accessory flagellum of antenna 1, often 
greatly developed, may dwindle sometimes to a single joint or tuberele, or 
disappear entirely. Mouth-parts (Fig. 87, 88) normal. Upper lip with a 
rounded, entire or only slightly emarginate distal border; lower lip with 
inner lobes well developed, slightly indicated, or absent. Mandible with 
dentate cutting. edge and accessory plate, spine-row, molar, and 3-jointed 
palp (only in one genus 24 joint smaller than 1%). Maxilla 1 with inner 
and outer plate and 2-jointed palp (only exceptionally 1° joint as large as 24). 
Maxillipeds with inner and outer plates and palp well developed. Gnatho- 
pods 1 and 2 generally rather powerful, rarely less than subchelate, seldom 
both weak; sometimes stronger and larger in J than in ©. Peraeopods 
more or less slender, sometimes stout, sometimes 24 joint in peraeo- 
pods 3—5 little expanded. Pleopods lose only by exception one ramus and 
uropod 3 one or both of the rami. Uropod 3, rami more or less foliaceous, 
projeeting beyond uropods 1 and 2; uropod 3 and telson never hooked. 
Telson (Fig. 89 p. 481) either with entire margin or cleft to the base, 
sometimes strikingly different in the two sexes. 

The greater part of the family lives in fresh and brackish water of seas, lakes, 
rivers; also in wells and other subterranean waters; rarely in the ocean. Cosmopolitan. 


52 genera, 243 accepted and 48 doubtful species. 


Synopsis of genera: 


Pleon (Fig. 84), segments 4—6 coa- 
lesceed — 2. 


A Pleon (Fig. 85), segments 4—6 not 
coalesceed — 8, 
0 | Eyes wanting, body pellucid . .. . 1. Gen. Boruta . ....... p. 867 
Eyes present, body not pellueid. . . 2. Gen. Synurella. ...... p- 368 
j Pleopods with a single ramus. . . . 3. Gen. Paracrangonyx . . . . p.369 
\ Pleopods with two rami — 4. 
4 f Uropod 3 without rami »..... 4. Gen. Apoerangonyx . . . . p.370 


\ Uropod 3 not without rami — 5. 
f Uropod 3 with a single ramus — 6. 
\ Uropod 3 with two rami — 7. 


- Gammaridae 


Re, 5 long, 2d joint moderately 


” N ee 

6 Peraeopod 5 short, 24 st greatly 

ee 

Telson sometimes entire, sometimes 

emarginate or cleft....... 

Telson entire, with or without emar- 
gination — 8. 


Telson eleft — 15. 


Telson not emarginate — 9. 


ie Telson emarginate — 11. 


Uropod 3, rami long 
Uropod 3, rami short — 10. 


Antenna |], accessory flagellum short 


© 


10 


Antenna 1, aeccessory flagellum long 
Uropod 3, innerramuslonger than outer 
11 2 Uropod 3, inner ramus shorter than 
AR outer -— 12. 
ee 19 Uropod 3, inner ramus well developed 
FR Uropod 3, inner ramus very short — 18. 
E 2 13 Body RE ge 
= Body with dorsal carina — 14. 
E 14 Peraeopods 3—5 rather short . 


Peraeopods 3—5 very long 


Antenna 1 without accessory flagellum 


Antenna 1, accessory flagellum 1- or 2- 
jointed — I. 

Antenna 1, accessory flagellum of more 
than 2 joints — 29. 


Maxilla 1, 2d joint of palp not longer 


17 than Ist EI ET ee 
Maxilla 1, 24 joint of palp longer 
than. st — 18. 


Uropod 3 short — 19. 
Uropod 3 well developed — 20. 


Body more or less carinate. .. . . 
Body not carinate 


jr 


19 


Uropod 3, outer ramus much longer 
than inner — 21. 

Uropod 3, outer ramus not much longer 
than inner — 285. 


Uropod 3, outer ramus 1-jointed . . 
Uropod 3, outer ramus 2-jointed — 22. 


"Maxilla 1, inner plate with few setae . 


Maxilla 1, inner plate with many 
setae — 23. 

Uropod 3, PL joint of outer ramus 
N ae 


| 
RN 
| 
| 
| 
# 
| 
| 
= 
es 
: 
{ 
{ 
| 
| 
di 


Uropod 3, 2d joint of outer ramus 
very short — 24. 


5 4 


Antenna 1 with accessory flagellum — 16. 


5. 


6. 


7: 


8. 

9. 
10. 
iH, 
12. 
13. 
14. 
15. 
16. 


17. Gen. 


18. 
19. 


20. 


21. 


22. 


Gen. 


Gen. 


Gen. 


Gen. 7 
Gen. 
Gen. 
Gen. 
Gen. 
Gen. 
Gen. 


.Gen. 
Gen. 


Gen. 


Gen. 


Gen. 


Gen. 


Gen. 


PERS IT st A, Bone | 


Amathillopsis 


Gammarellus 
Euerangonyx 


Axelboeckia 
Braehyuropus . . .. 


Macrohectopus. . . . 


Miceruropus 


Neoniphargus . . - . 


a a ET Ar 


p. 395 


p. 395 
p. 398 


je 


866 Gammaridae _ 


Gnathopods 1 and 2 subequal . . . 23. Gen. Gmelina. ...... p.412 
Gnathopod 1 much stronger than gna- 

ER . . 24. Gen. Gmelinopsis . . . . . p.414 
Gnathopod 2 not larger than gna- 

thopod 1 — 26. 
Gnathopod 2 larger than gnatho- 

pod 1 — 27. 

Uropod 3, peduncle shorter than outer 

(I-jointed?) N Re . 25. Gen. Hakonboeckia - . . . p.415 
Uropod 3, peduncle as long as outer 

(2-jointed) ramus . ». »....». 26. Gen. Baikalogammarus . . p.416 
Mandible, 2d joint of palp shorter 

RE EN En SR 27. Gen. Parelasmopus . . . . p.417 
Mandible, 2d joint of palp Gone 

than 1st — 28, 
Uropod 3, rami narrowly lanceolate . 28. Gen. Cheirocratus. . . . . p. 417 
Uropod 3, rami laminar, apically 

zöunded EEE RR RER . 29. Gen. Megaluropus. . .. . p- 420 


24 


27 


28 


Body notatallorscarcely carinate — 30. 
Body distinetly carinate — 46. 
Body without groups of dorsal spi- 
nules — 31. 
Body with groups of dorsalspinules— 40. 
Uropod 3 large — 32. 
Uropod 3 not large — 36. 
Uropod 3, rami very unequal . . . . 30. Gen. Melita. ....... p-. 421 
Uropod 3, rami not very unequal — 38. 


| 
M| 
"| 
| 
| 
| 
Antenna 2 stout. 2». =... 31. Gen. Paraceradocus . . . . p.429 
“| 
| 
| 
\ 
ii 


30 


3l 
32 


33 Antenna 2 slender — 34. 


Maxillae 1 and 2 with inner plate very 

BROWSEN EL en ea 32. Gen. Ceradocus . . ... . p- 430 
Maxillae 1 and 2 with inner plate not 

very setose — 835. 
Peraeopods 83—5 slender ...... 38. Gen, Massa... 2 p. 483 
Peraeopods 8—5 robust . ... .» . 84. Gen. Elasmopus. .... . p- 441 
Uropod 3, rami equal ....... 85. Gen. Plesiogammarus . . . p.446 
Uropod 3, rami unequal — 37. 
Peraeopods 1—5, 6th joint apically 

RER ee ER 36. Gen. Iphigenella .... . p- 447 
Peraeopods 1—5, 6th joint not apically 

widened — 838. 
Lower lip without inner lobes . . . 87. Gen. Pandoritesı .... . p. 448 
Lower lip with inner lobes — 39. 
Antenna 1 long, with long peduncle 38. Gen. Pherusa . . ... . .p.449 
Antenna 1 short, with short pedunele 39. Gen. Niphargoides . . . . p.450 
Without eyes . . . ."2 2.2.2... 40. Gen. Phreatogammarus . . p.453 
With eyes — 41. 
Eyes (Fig. 86) of irregular form. . . 41. Gen. Ommatogammarus . . p.454 
Eyes of regular form — 42. : 
Side-plate 5 dentately produced . . 42. Gen. Odontogammarus . . p.456 
Side-plated5 not dentatelyproduced — 48. 
Pleon segments 4 and 5 each raised ; { 

dorsally to a spiniferous tuberele 43. Gen. Dikerogammarus. . . p.458 
Pleon segments 4 and 5 not raised 

dorsally to aspiniferoustuberele — 44. 


35 


86 


39 


40 


41 


42 


Groups of dorsal Elias limited to 


| pleon age De U 44 
44 & 47. 
Groups of dorsal spinules (Fig. 89) 
| not mn. to pleon segments 
4—6 — 
Antenna 1, a longer than pe- 
"4 duncle of antenna 2 ...... 45. 
Antenna 1, pedunele shorter than pe- 
ERS BETTER a N . 46. 
Pleon segments 1—3 without median 
46 N a er en Er ER IET 48. 
Pleon segments 1—3 with median 
earina — 47. 
Body with median carina only — 48. 
47 & Body with aan and lateral ca- 
rinae — 
Peraeopod m 2d joint with broad 
48 iower hind bobe  . . 2... .. 49 
Peraeopod 5, 2d joint without broad 
lower Rind Iobe . . . .. . ... 50 
Ta EN 51 
u { N 4 Re ee a 52 


Gammaridae, Boruta 


. Gen. 
Gen. 


Gen. 
Gen. 


Gen. 


. Gen. 


. Gen. 
. Gen. 
. Gen. 


567 
Gammarus. ..... p. 460 
Heterogammarus*). . p.494 
Poekilogammarus . . p. 477 
Echinogammarus. . . p.479 
Parapallasea. ... . p- 497 
Amathillina ..... p- 499 
Carinogammarus. . . p.501 
Gammaracanthus - pP. 507 
Acanthogammarus . . p.508 


1. Gen. Boruta Wrzesn. 


1888 Boruta (Sp. un.: 


1896 COrangonyx, Vejdovsky in: SB. Böhm. Ges., nr. 10 p.5. 
Close to Synurella (p. 368). Pleon segments 4—6 coalesced (Fig. 84). 


E: Eyes wanting. Lower lip without inner lobes. 


Fig. 84. B. tenebrarum, 2. 


Lateral view. 
[After Wrzesniowski.] 


B. tenebrarum), Wrzesniowski in: Pam. Fizyjogr., v. 8 
9.264 | 1888 B., T.Stebbing in: Rep. Voy. Challenger, v.29 p.1656 | 1890 B., Wrzesniowski 
in: Z. wiss. Zool., v.50 p.639 | 1893 B., A. Della Valle in: F. Fl. Neapel, v.20 p. 647 | 


Mandible, molar with a very 


u 


--- Pleonsegments4—6. 


BBOre apically truncate seta. Maxilla 1, inner plate with 7 setae, outer - with 
7 spines, which are apically broad and pectinate, 24 joint of palp carrying 
curved setae on both the right and left maxilla. 


on outer plates than in Synurella. 


l species. 


Maxillipeds with more setae 


Telson emarginate, not cleft. 


*) For the differences of these two genera see p. 494. 


368 Boruta, Synurella 


1. B. tenebrarum Wrzesn. 1888 B. t., Wrzesniowski in: Pam. Fizyjogr., v.8 
(p.72) t.9—16 ; 1888 B. t., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1656 | 1890 B.t., 
Wrzesniowski in: Z. wiss. Zool., v.50 p.677 t.28 £.6.7, 9,13, 15, 16; 1.29 f. 4-6; t.30 
f.1, 2,4,6,15; t.31 £.1, 2,4, 6-13, 15—17; 1.82 f.2--7,9 | 1898 B.t., A. Della Valle 
in: F. Fl. Neapel, v.20 p. 647. 


Body moderately elongate, pleon segments carıying a few dorsal 
setules. Head, front corners rather prominent, truncate. Side-plate 4 the 
largest, emarginate. Pleon segments 1—3 (Fig. 84), postero-lateral corners 
quadrate (figure), sharply pointed (text). Antenna 1 athird of length of body or 
a little more, 1° joint of peduncle subequal to 24 and 34 combined, flagellum 
once and a half as long as pedunele, 12- or 13-jointed, accessory flagellum 2- 
Jointed, shorter than first 2 joints of primary. Antenna 2 much shorter, ultimate 
joint of peduncle shorter than penultimate, flagellum not equal these 2 combined, 
5-or 6-jointed. Mandible, 24 and 34 joints of palp subequal. Gnathopod 1, 
5th joint little longer than broad, 6" once and a half as long as broad, palm 
almost straight, scarcely oblique. Gnathopod 2, 5" and 6!" joints longer than in 
gnathopod 1, especially in O, with palm more oblique; finger in both gnathopods 
acute, curved, smooth on concave margin. Peraeopod 4 the longest. Peraeo- 
pods 3—5, 24 joint broadly oval, with serrate margins. Uropod 1, peduncle 
rather longer than rami. Uropod 2, pedunele subequal to rami. Uropod 3 
subequalto peduncle of uropod 2, ramus betweenhalf and athirdas long aspeduncle, 
tipped with a spine. Telson rather longer than broad, emarginate less than 
!/), of length, the broad apices each armed with 4 spines. Branchial vesicles 
attached to gnathopod 2 and peraeopods 1—5 by a narrow stalk-like beginning. 
On peraeon segments 2, 3, 6 and 7 and between 1° pair of pleopod 1 there 
are pairs of tube-like sacs (accessory branchiae), close together on peraeon 
segments 7 and 8 and pleon segment 1, but wide apart and close to the 
side-plates on peraeon segments 6 and 7, these latter being the largest. 
Marsupial plates very large. Colour pellucid. L. © over 7, © under 4 mm. 


Northern slopes of Tatry mountains. In wells. 


2. Gen. Synurella Wrzesn. 


1877 Synurella (Sp. un.: $. polonica), (Wrzesniowski in:) Hoyer in: Z. wiss. 
Zool., v.28 p.403 | 1879 Goplana, Wrzesniowski in: Zool. Anz., v.2 p.299 | 1888 @., 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.472, 501 | 1890 @., Wrzesniowski in: Z. 
wiss. Zool., v.50 p. 635 | 1890 G., Wrzesniowski in: Biol. Oentralbl., v.10 p.151 | 1893. 
@., A. Della Valle in: F. Fl. Neapel, v.20 p. 645. 


Pleon segments 4—6 coalesced. Side-plates 1—4 much deeper than 
the following. Eyes with few elements. Antenna 1 the longer, accessory 
flagellum 2-jointed. Antenna 2, flagellum in J calceoliferous. Lower lip 
with inner lobes. Mandible normal, molar with a long plumose seta. 
Maxilla 1, inner plate with several (7) setae, outer with 7 spines, some 
furcate, some serrulate, 24 joint of palp carrying spines and setae. Maxilla 2 
with few setae’ on inner margin of inner plate. Maxillipeds, outer plates 
with few setae, palp long. Gmnathopods 1 and 2 similar, subchelate, 6! joint 
little dilated. Uropod 3 with a single conical ramus. Telson emarginate 
or. cleft. 


2 species. 
Synopsis of species: 


Toon tt ZEN ng 1.8, ambaulans : . ....... p- 369 
Telson emarginate . ..2.....n 2... 2:8, DORREROR 2 p- 869 


Synurella, Paraerangonyx 369 


1. S. ambulans (Fr. Müll.) 1846 Gammarus a., Friedr. Müller in: Arch. Naturg., 
v.121 p. 296 t.10 f. A—C | 1872 Crangonyx 4., r% Boeck, Skand. Arkt. Amphip., 
v.1 p.52 | 1879 Goplana a., Wrzesniowski in: "Zool. Anz., v.2 p.302 | 1888 @. 4, 


 — —-T.Stebbing in: Rep. Voy. Challenger, v.29 p. 217, 502 | 1893 @.a., A. Della Valle in: 
 —_F. Fl. Neapel, v.20 p. 644. 


Close to S. polonica, perhaps identical with it. Back smooth. Head 
without rostrum. Eyes tending to round. Antenna 1, the 2-jointed accessory 
flagellum very small. Uropod 3 very small. Telson cleft(?), appendages 
short, eylindrical, spinulose at apex. L. about 45 mm. 


Near Greifswald, and near Berlin. 


2. S. polonica Wrzesn. 1877 8.p., (Wrzesniowski in:) H. Hoyer in: Z. wiss. 
 Zool., v.28 p.403 | 1879 Goplana p., Wrzesniowski in: Zool. Anz., v.2 p.300 | 1888 @.p., 
T.Stebbing in: Rep. Voy. Challenger, v.29 p. 472, 501, 503 | 1890 @. p., Wrzesniowski 
in: Z. wiss. Zool., 0.50 p.639; 1.28 £.13; 1.30 f.5, 14; t.31 f.3 | 1893 @. p., A. Della 


Valle in: F. Fl. Neapel, v.20 p. 646. 


Body rather stout, back broad, rounded. Head, front corners very 
prominent. Eyes of moderate size, deep brown black, pigment somewhat 
irregularly distributed, erystalline cones few. Uropod 3, peduncle broad, 
the single ramus very short, with 1 spine at the apex. Telson apically 


emarginate. ‘In both sexes gnathopod 2 and peraeopod 1 have a pair of 


eylindrieal accessory branchiae on the front rim of fleshy part of side-plates, 


5 = and to peraeopods 4 and 5 and to the front rim of pleon segment 1 


similar but simple accessory branchiae are attached. In the S from gnathopod 2 
to peraeopod 5 there are lamellar appendages homologous in situation and 
structure to the marsupial plates of the O0. Colour, © green, Q brownish- 
yellow, both with an irregular patch of lemon-yellow on top of the head. 
L. © 65 mm, © smaller. 


Warsaw.: In weedy ditch. 


3; Gen. Paracrangonyx Stebb. 


1899 Paracrangony& (Sp. typ.: P. compactus), T. Stebbing in: Tr. Linn. Soc, 
London, ser.2 v.7 p. 422. 


Side-plates 1—4 shallow, not deeper than the rest. Eyes rudimentary. 
Antenna 1 longer than antenna 2, accessory flagellum small. Upper lip 
faintly emarginate. Lower lip with small inner lobes. Mandible, molar 
small, 34 joint of palp subequal to 24. Maxilla 1, inner plate with 2 setae, 
outer with. 7 spines, palp 2-jointed. Maxilla 2, outer plate rather longer 
and broader than inner. Maxillipeds, outer plates short, palp large. Gnatho- 
pods 1 and 2 subchelate, 6!" joint oval, palm oblique. Peraeopods 1 and 2, 
24 joint narrowly ovate. Peraeopods 3—5, 24 joint narrowly oblong. Pleo- 
.pods 1—3 slight, 1-branched. Uropods 1—3 short, biramous. Uropod 3 
with inner ramus very small. Telson entire. 


1 species. 


1. P. compactus (Chilton) 1882 Crangonyx c., Chilton in: N. Zealand J. 
Sei., v.1 p.44 | 1893 C©.c., A. Della Valle in: F. Fl. Neapel, v.20 p.682 t.60 f.14 | 
1894 C. c., Chilton in: Tr. Linn. Soe. London, ser.2 v.6 p.220 t.20 | 1899 Paracran- 
gony& c., T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p.422. 


Pleon rather deep, segments 1—3 not much longer than those of 
peraeon. Head not rostrate, lateral corners rounded. Pleon segment 3, 
Das Tierreich. 21. Lief. T.R.R. Stebbing, Amphipoda I. 24 


370 Paracrangonyx, Apocrangonyx, Crangonyx 


postero-lateral corners subquadrate. Eyes represented by 2 or 3 imperfeect 
lenses without pigment. Antenna 1, 1° joint longer than 24, 24 once and 
a half as long as34, flagellum rather longer than pedunele, 13-jointed, accessory 
flagellum with 2 joints, 24 minute. Antenna 2, ultimate and penultimate 
joints of pedunele equal, flagellum shorter than either, 5-jointed. Gmnathopod 1, 
5th joint short, cup-shaped, 6tk twice as long, palm about as long as hind margin, 
defined by spines, finger closely fitting it. Gmathopod 2 similar, but 5tk joint 
much longer and 6tk slightly shorter, with shorter and better defined 
palm. Peraeopods 1—5, finger short. Pleopods well armed with coupling-spines, 
the slender single ramus without cleft spines, such as are commonly found 
on 1° joint of inner ramus. Pleopod 1, ramus with 11 joints, pleopod 2 
with 6, pleopod 3 with 3. Uropod 1, pedunele longer than the faleiform 
rami, outer ramus rather the shorter. Uropod 2, peduncle little longer than 
the subequal rami. Uropod 3, peduncle short, outer ramus thrice as long, 
with small 24 joint, inner ramus rudimentary. Telson oblong ovate, with 
spinule at each corner of the broad apex. Colour white, semi-transparent. 
L. about 8 mm. 

New Zealand (from pump at Eyreton, from Leeston, and from wells at Canterbury). 


4. Gen. Apocrangonyx Stebb. 


1899 Apocrangonyx (Sp. typ.: A. lucifugus), T. Stebbing in: Tr. Linn. Soe. London, 
ser. 2 v.7 p.422. 

Eyes wanting. Antenna 1 longer than antenna 2, accessory flagellum 
small. Gnathopod 2 stouter than gnathopod 1. Peraeopods stout. Uropod 3 
rudimentary, without rami. Telson entire. 


1 species. 


1. A. lueifugus (0. P. Hay) 1882 Crangonys l., OÖ. P.Hay in: Amer. Natural., 
v.16 p.144 | 1893 0. 1., A. Della Valle in: F. Fl. Neapel, v.20 p.682 | 1894 C.1., Chilton 
in: Tr. Linn. Soc. London, ser.2 v.6 p.219 | 1899 Apocrangonyz l., T. Stebbing in: 
Tr. Linn. Soc. London, ser.2 v.7 p.422, 

5. Pleon segment 3, postero-lateral corners subquadrate. Antenna 1 
scarcely half as long as body, 24 joint ?/, as long as 1°, 34 joint ®/, as long as 24, 
flagellum 14-jointed, accessory flagellum 2-jointed. Antenna 2, half as long as 
antenna 1, ultimate and penultimate joints of peduncle long, together longer 
than flagellum, which is about 5-jointed. Gnathopod 1, 6% joint quadrate, palm 
smooth-edged, fringed with spines. Gnathopod 2, 6! joint ovate, edge of palm 
uneven. Peraeopods 4 and 5 the longest, subequal. Uropod 1, rami equal, 
shorter than pedunele. Uropod 2, outer ramus nearly as long as pedunele, inner 
nearly twice as long as outer. Uropod 3 consisting of a single joint which is 
rather longer than the telson, broadly ovate, ”/, as broad as long, with 2 short 
spines at apex. Telson a little longer than wide, narrowing a little to the truncate 
apex, which has 2 stout spines at each corner. Colour pale. L. reaching 
6 mm. — In 9 gnathopod 2 has the palmar margin less oblique. 

Illinois (well in Abingdon). 


5. Gen. Crangonyx Bate 


1859 Crangonyx (Sp. un.: C. subterraneus), Bate in: P. Dublin Univ. zool. bot. 
Ass., v.1 p.237 | 1890 C., Wrzesniowski in: Z. wiss. Zool., v.50 p. 634, 697 | 1893 C., 
A. Della Valle in: F. Fl. Neapel, v.20 p.681 | 1894 C., Chilton in: Tr. Linn. Soc. London, 


ser.2 v.6 p.218 | 1896 C©., Vejdovsky in: SB. Böhm. Ges., nr.10 p.5 | 1872 Stygobromus 


(Sp. un.: 8. vitreus), E.D. Cope in: Amer. Natural., ©.6 p.422 | 1875 Stygodromus, 
E. v. Martens in: Zool. Ree., v.10 p. 189. 


Crangonyx 371 


Body eompressed, not carinate. Side-plates 1—4 deeper than the 
following. Eyes present or absent. Antenna 1 the longer, accessory flagellum 
small, 2-jointed. Mouth-parts imperfectly known, probably near to those of 
Niphargus (p. 405), but (in C. flagellatus) lower lip with very small inner lobes, 
maxilla 1, inner plate with 6 setae, maxilla 2, inner plate he fringed 
on inner margin, maxillipeds, outer plates narrow. Gnathopods 1 and 2 
subchelate, 6" joint not ee broader than 5tt. Peraeopods 3—5, 24 joint 
moderately expanded. Uropod 3 not elongate, with single 1-jointed ramus. 
Telson entire or partly cleft. \ 


6 accepted species, 1 doubtful. 


Synopsis of accepted species: 


Uropod 8, peduncle shorter than ramus. . . . . 1. C. subterraneus . p. 371 
I | Uropod 3, peduncle longer than ramus — 2. 
Telson not eleft — 3. 
3 ! Telson more or less deeply eleft — 5. 
3 { Telson more than twice as long as broad.... . . 2. C.flagellatus . . p.371 
Telson less than twice as long as broad — 4. 
4 \ Apex of telson with shallow sinus ....... 3. C. vitreus. . . . p.372 
Apex of telson slightly arcuate . . ...... 4. C.tenuis . . . . p.372 
5 ! Uropod 3, ramus more than half length of peduncle 5. C. bifureus . . . p.373 
Uropod 3, ramus less than half length of peduncle 6. C. recurvus . . . p.373 


1. C. subterraneus Bate 1859 (©. s., Bate in: P. Dublin Univ. zool. bot. Ass., 
v.1 p.237 | 1862 ©. s., Bate, Cat. Amphip. Brit. Mus., p.178 t.32 £.6 | 1893 ©. s., A. 
Della Valle in: F. Fl. Neapel, v.20 p.681 | 1896 C. s., Vejdovsky in: SB. Böhm. Ges., 
nr. 10 p.5. 


Side-plates 1—4 moderately deep, 4! the largest, slightly excavate 
behind. Pleon segments 1—3, postero-lateral corners seemingly obtusely 
quadrate. Eyes imperfeetly formed, showing small irregular patches of lemon- 
coloured pigment. . Antenna 1 about '/, length of the rest of the animal, 
1st joint as long as 24 and 34 combined, flagellum as long as peduncle, 
about 11-jointed. Antenna 2 more slender. Gnathopod 1 stouter but 
shorter than gnathopod 2, 5% joint about as broad as 6%, but rather shorter, 
6!h quadrate, palm slightly convex, not very oblique. Gnathopod 2, 5" joint 
much longer than broad, 6!" longer but scarcely broader, fusiform, palm very 
oblique, ill-defined. Peraeopods 1 and 2 much more slender than the 
following, which are successively longer, with well expanded 24 joint. Uropods 
1—3 reaching nearly equally far back. Uropod 1, rami equal, rather shorter 
than pedunele. Uropod 2, rami equal, subequal to pedunele. Uropod 3, ramus 
about twice as long as the short peduncle. Telson narrow, entire. L. 5 mm. 


England (well in Hampshire). 


pr 


2. C. flagellatus Benediet 1896 (©. f., J. E. Benedict in: P. U.S. Mus., v.18 p.616. 


Side-plates 1—4 moderately deep. Pleon segment 3, postero-lateral 
eorners obtusely quadrate. Eyes wanting. Antenna 1, 1° joint rather longer 
than 24, 24 nearly thrice as long as 34, 34 thrice as long as broad, flagellum 
sometimes as long as body, reaching 61 joints. Antenna 2 shorter, ultimate 
and penultimate joints of peduncle long, subequal, flagellum reaching 19 joints. 
Upper lip broadly rounded, longitudinally earinate. Lower lip, inner lobes 
small. Mandible, eutting edge and accessory plate dentate, accessory plate 
slighter on right mandible, few spines in spine-row, molar prominent, strong, 

palp, 24 and 34 joints large, subequal, well armed. Maxilla 1, inner plate 


24* 


rt 


372 Urangonyx 


with 6 setae, outer with 7 spines, 24 joint of palp with a few spinules on 
apex. Maxilla 2, inner plate with 4 setae on. inner margin, both plates 
armed apically. Maxillipeds, inner plates with 4 spine-teeth on truncate apex, 
outer plates scarcely so large, not reaching apex of palp’s 1° joint, fringed on 
apex and inner margin with slender spines, palp elongate. Gnathopods 1: 
and 2 similar, 5» joint triangular, cup-shaped, 6'" much longer, large, broadest 
at base, the long, oblique, rather convex palm fringed with numerous spines, 
the series continued beyond a large palm-defining spine, which the large 
curved finger reaches. Peraeopods 1—3 slight. Peraeopods 4 and 5 rather 
stronger and much longer. Peraeopods 3—5, 24 joint long oval. Uropods 1 
and 2 extending much beyond uropod 3, strongly spinose. Uropod 1, pedunele 
longer than subequal rami. Uropod 2, peduncle subequal to slightly unequal 
rami. Uropod 3 short, pedunele rather broader than long, smooth, ramus much 
narrower and shorter, apically spinose. Telson about thrice as long as broad, 
slightly tapering to the truncate, very spinose apex. L. 12—14 mm. 


Texas (artesian well at San Marcos). 


3. C. vitreus (Cope) 1872 Stygobromus v., E.D. Cope in: Amer. Natural., v.6 
p.422 | 1888 Crangony« v., (S. 1. Smith in:) Pe in: Mem. Ace. Washington, ®.41 D 54 
t.5 f. 1-4. 

Side-plate 4 the deepest, excavate behind, broader than any but the 
5th, Pleon segments 1—3, postero-lateral corners obtusely quadrate. Eyes - 
wanting. Antenna 1 about '/, length of body, 1% joint as long as 24 and 
34 combined, flagellum rather longer than peduncle, 10-jointed. Antenna 2 
shorter, flagellum about 6-jointed. Gmnathopod 1, 5tk joint rather short and 
broad, 6! wider and much longer, palm making a very obtuse angle with 
the shorter hind margin. Gnathopod 2 much larger, 5tk joint short, triangular, 
cup-shaped, 6" large, widest at commencement of the long palm, thence 
narrowing to hinge of finger, palm fringed with spines and defined from 
the much shorter hind margin by 2 spines much longer than the rest, finger 
strong, curved. Peraeopods 1—3 subequal. Peraeopods 4 and 5 subequal, 
much longer than peraeopods 1—3; 24 joint in peraeopods 3—5 oblong oval. 
Uropods 1 and 2 extending beyond uropod 3; in uropod 1 peduncle considerably 
longer than the subequal rami, in uropod 2 only a little longer than the 
rami, of which the outer is a little shorter than the inner.. Uropod 3, 
pedunele short, stout, little longer than broad, single ramus minute, scarcely 
longer than broad, with 3 spinules at apex. Telson rectangular, nearly as 
broad as long, apical margin with a very shallow sinus in middle, each side 
of which is armed with several slender spines. Colour translucent. L. oO 
over 5 mm. 


Kentucky (Mammoth Cave). Furrowing in the mud of pools. 


4. C.tenuis S.I.Sm. 1874 C.t., S.I Smith in: Rep. U. S. Fish Comm., v.2 
p- 656 | 1893 ©. t., A. Della Valle in: F. Fl. Neapel, v.20 p. 682. 


Slender, elongated. Side-plates very shallow, more as in Niphargus 
than in Crangonyx. Eyes not perceived. Antenna 1 usually longer than 
antenna 2, flagellum with 16—19 joints in antenna 1, with 8—10 in antenna 2, 
but exceptionally large 9 had 1° antenna 5 mm long; flagellum twice as long 
as pedunele, with about 22 joints, antenna 2 stout, 6 mm long, flagellum 
as long as peduncle, 15-jointed. Gnathopods 1 and 2 differing little in the 2 
sexes, gnathopod 1 the stouter, with palm more oblique, palm in both pairs 
armed on each side with a series of stout, obtuse spines, with a notch and 


IE ans Be a ee a Tan; a EA A ae ua 
rt Bet ul ra en = Ve Bi a FE ? 


Crangonyx 378 


a cilium near the tip (this feature appears to be common in the genus). 
Uropods 1—3 extending to about the same point. Uropod 1, rami subequal, 
scarcely half as long as peduncle. Uropod 2, rami very unequal, outer 
half as long as inner. Uropod 3 scarcely as long as telson, the ramus 
very small, tipped with 4 or 5 setiform spinules. Telson ?/, as broad as 
long, tapering slightly to the entire, slightly arcuate apex, which is armed 
with about 10 slender spinules.. L. usual 6—8, largest d 13°5 mm. 
Connecticut (wells at Middletown). 


5. C. bifurcus O.P. Hay 1882 C.b., O.P. Hay in: Amer. Natural., v.16 p.145 | 
1894 €. b,, Chilton in: Tr. Linn. Soc. London, ser.2 v.6 p. 218. 

Pleon segments 1—3, postero-lateral angles drawn backward into a 
decided tooth. Eyes oval, black. Antenna 1, 1° and 24 joints subequal, 
34 ®), length of 24, flagellum 24-jointed. Antenna 2 half as long as antenna 1, 
ultimate and penultimate joints of peduncle equal, these and the flagellum 
carrying sensory organs, which in spirit resemble a lanceolate or oblanceolate leaf 
having a midrib and parallel veinlets running from this to the margin. 
Gnathopod 2 with 6!" joint more elongate and with a more oblique palm than in 
gnathopod 1. Uropod 3, the ramus about ?/, as long as peduncle; a process of 
the peduncle is thought perhaps to represent the missing inner ramus. Telson 
twice as long as broad, sides nearly parallel, eleft nearly °/, of length, each 
prong armed at apex with 3—5 spines. L. about 9 mm. 

Mississippi (at Macon, from rivulet flowing down the limestone hills into the 
Noxubee-River). 


6. ©. recurvus (Grube) 1861 Gammarus r., E. Grube, Ausfl. Triest, p. 137 | 
1864 & 66 Crangonyx r., E. Grube in: Arch. Naturg., v.301 p.200; 0.321 p.410 t.10 
f.1 | 1893\0, r., A. Della Valle in: F. Fl. Neapel, v.20 p. 682 | 1871 C. recurvatus, 8.1. 
Smith (& A. E. Verrill) in: Amer. J. Sei., ser.3 v.2 p. 448. 

Back smooth, pleon segments 1—3 not longer than the preceding. Side- 
plates 1—4 comparatively deep. Pleon segments 1—3, postero-lateral angles 
(in figure) acute. Eyes small, oval, composed of about 15 elements, pigment 
dispersed, black. Antenna 1 a little longer than half the body, flagellum con- 
siderably longer than peduncle, 14- or 15-jointed. Antenna 2 much shorter, 
ultimate and penultimate joints of peduncle equal, flagellum 5- or 6-jointed. 
Gnathopods 1 and 2 similar, 5tk and 6tk joints about equal in length and 
breadth, 6% longer than broad, subreetangular, palm scarcely oblique in 
gnathopod 1, a little more so in gnathopod 2, in neither as long as hind 
margin. Gnathopod 2, 5! and 6tk joints longer than in gnathopod 1. 
Peraeopods 3—5, 24 joint oblong oval, with erenulate hind margin. Mar- 
supial plates, except the last, very large, with long setae. Uropod 3 very 
short, not extending so far as 1° and 24, the ramus shorter than peduncle, 
with 1 or 2 spines at apex. Telson rather long, cleft to’the middle, apices 
acute. L. 3—6 mm. © 

Island of Cherso. 


C. ermannii (M.-E.) 1840 Gammarus e., H. Milne Edwards, Hist. nat. Crust., 
v.3 p.49 | 1862 Orangonys e., Bate, Cat. Amphip. Brit. Mus., p.179 t.32 f£.7 | 1893 
C. e., A. Della Valle in:-F. Fl. Neapel, v.20 p.682. 

Eyes round, small. Antenna 1 the longer, flagellum longer than pedunele. 
Gnathopods 1 and 2 subequal, alike, 6th joint ovate, palm oblique, not defined, 
scarcely leaving any hind margin. Uropod 3 short, scarcely extending beyond 
preceding, ramus unarmed (Bate). According to Milne Edwards uropod 3 and telson 
end in two conical unarmed stylets. L. 15 mm. 

Warm springs of Kamtchatka. 


374 Hyalellopsis, Pallasea 


6. Gen. Hyalellopsis Stebb. 


1899 Hyalellopsis (Sp. typ.: H. czyrnianskii), T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 v.7 p. 422. ’ 


Body (Fig. 85) smooth, pleon segments 4—6 very short. Head, rostrum 
insignificant. Side-plates I—4 moderately deep, rounded below, setuliferous, 
4th excavate behind, much deeper than 5t". Antennae 1 and 2 short, antenna 1 
rather the longer, with 1-jointed aecessory flagellum. Mouth-parts perhaps as in 
Gammarus (p. 460). Gnathopods 1 and 2 subchelate. Peraeopods 1—4, 24 joirit 
heart-shaped: Peräeopod 5 short, 24 joint as long as rest of limb, much 
expanded and distally produced. Uropods 1— 3 short, especially uropod 3, 
which is uniramous. Telson small, rounded. 


1 species. 

1. H. czyrnianskii (Dyb.) 1874 Gammarus e,, B. Dybowsky in: Horae Soe. 
ent. Ross., v.10 suppl. p.158 t.9 f.5 ! 1899 Hiyalellopsis c., T. Stebbing in: Tr. Linn. 
Soc. London, ser.2 ©.7 p. 422. 


Surface of body (Fig. 85) free from prominences, setae, spines, or hairs. 
Head, lateral lobes truncate, little produced. Pleon. segment 3, postero- 
. lateral corners (in figure) rounded. Eyes small, roundish, very prominent, black. 
Antenna 1 about '/, as long as body, little longer than antenna 2, peduncle 
stouter and somewhat longer, its 1° joint stout, flagellum 
9—11-jointed, a little longer than peduncle; antenna 2, 
flagellum 5—8-jointed. Gnathopod 1, 6% joint piriform, 
more slender in S than in 9. Gmathopod 2, 6% joint 
oblong. Peraeopods 3 and 4, 24 joint having the slightly 
convex hind margin beset with short setae. Peraeopod 5, 
24 joint having hind margin evenly rounded, produced 

nn Br .. a rounded .. and carrying I es 

NER while the front margin has long stout setae in fascicles. 

en ; Uropods 1 and 2 are said to reach beyond uropod 3 

[After B. Dybowsky.] (scarcely in figure). Uropod 3 very short, rudimentary, 

ramus set like a stump on the short, broad pedunele, and 

carrying on its flat broad apex 5 or 6 stout spines. Telson small, leaf- 
like, semieireular. Colour dark horn-grey,. L. d 11, 0 7 mm. 


Lake Baikal. Depth 10 m. 


7. Gen. Pallasea Bate 


1793 [Subgen.] Gammarellus (part.), J. F.W. Herbst, Naturg. Krabben Krebse, 
v.2 p.106 | 1862 Pallasea, Bate, Cat. Amphip. Brit. Mus., p.200 | 1867 P., G. O. Sars, 
Crust. d’Eau douce Norvöge, p. 67 | 1876 P., A. Boeck, Skand. Arkt. Amphip., v.2 
p. 374 | 1893 P., A. Della Valle in: F. Fl. Neapel, v.20 p. 755 | 1899 P., T. Stebbing in: 
Tr. Linn. Soe. London, ser.2 v.7 p.422 | 1871 Pallasia (non Robineau-Desvoidy 1830, 
Diptera!), A. Boeck in: Forh. Selsk. Christian., 1870 p.206 | 1894 Pallasiella, G. O. Sars, 
Crust. Norway, v.1 p. 505. 


Rows of processes arming the back and sides or sides alone of some 
of the segments. Head, rostrum obsolete. Eyes prominent. Antenna 1 the 
longer, peduncle long, accessory flagellum rather short. Mouth-parts normal. 
Gnathopods 1 and 2 subchelate. Peraeopods 3—5 rather slender, 24 joint 
not greatly expanded, most so in peraeopod 5. Uropod 3 reaching to some 


Pallasea i 375 


extent beyond the others, inner ramus the shorter, but often nearly equal 


to the outer. Telson seldom deeply cleft. 


. 10 species. 


Synopsis of species: 


Antenna 1, accessory flagellum 1-jointed. ..... 1. P.dybowskii. . . p.375 
1 Antenna 1, accessory flagellum with more than one 
joint — 2. FR 
» Head with subdorsal dentate ridges. . . . . . 2. P.reissneri . . . p.376 
Head without dentate ridges — 3, 
Peraeon segment 5 distinguished by its large pair of 
subdorsal teeth — 4. 
‘ Peraeon segment 5 not distinguished by subdorsal 
teeth — 5. 
| Teeth of peraeon segment 5 simple, bent backward 
4 re A 3. P. cancellus . . . p.376 
| Teeth of peraeon segment 5 uheinate,raisedupward 4. P. gerstfeldtii. . . p. 3877 
5 j Subdorsal processes wanting on peraeon — 6. 
\ Subdorsal processes present on peraeon — 8. 


6 Uropod 3, inner ramus less than half outer . . 5. P. quadrispinosa . p.377 
Uropod 3, inner ramus more than half outer — 7. 


Peraeon segments with median tubereles. . . . 6. P.kesslerii. . . . p.378 

Peraeon segments without median tubereles . . 7. P.baikali... . . . p.378 
a Pleon segments with subdorsal and marginal 

PER Ber ET a a 8. P. brandti . . . . p.379 


N Pleon segments without marginal processes — 9. 


| Peraeon segments 1—4 with paired tubereles in 


EN RE ER EEE . Pgrubi,.. ., p. 879 
| Peraeon segments 1—4 with single (almost ob- 
solete) tubereles in median line... ... 10. P. cancelloides . . p.380 


1. P. dybowskii Stebb. 1874 Gammarus asper (non J. D. Dana 1852), B 
Dybowsky in: Horae Soc. ent. Ross., v.10 suppl. p.155 t.13 f.1 | 1893 Acanthonoto- 
soma? a., A. Della Valle in: F. Fl. Neapel, v.20 p.927 | 1899 Pallasea dybowski, T. 
Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.422. 


Peraeon segments 1—7 with lateral and marginal rows of tooth-like 
carinae or tubercles, marginal much stronger than the lateral, flattened, 
the first 5 almost twice as long as last 2, 5tk longer and more acute than the 
preceding; lateral rows consisting of small tubereles, the first 5 the stronger, 
the lateral rows slightly oblique. Pleon segments 1—3 with lateral rows of 
small tubereles, obscurely continued on segments 4—6, on segments 1 and 2 
a small median tuberele. Head with arched upper profile, rostral margin blunt, 
little projeeting; on the cheek-lobe a thick rounded hump prolonged outward 
and downward. Side-plates 1—4 with no setae on lower margin, side-plate 4 
with a central boss. Eyes not very large but very prominent, roundish, 
brown. Antenna 1 about '/, as long as body, nearly twice as long as antenna 2, 
peduncle somewhat longer than peduncle of antenna 2, flagellum 15—17-jointed, 
accessory flagellum 1-jointed. Gmnathopods 1 and 2, 6b joint larger in d 
than in ©, in gnathopod 1 piriform, in gnathopod 2 oblong. Peraeopods 
3—5, 24 joint moderately broad, elongate oval, with short, distant setae 
on hind margin; in peraeopod 5 wing produced downward in a rounded lobe. 
Uropod 1 reaching end of peduncle of uropod 3. Uropod 2 reaching end of pleon 


376 Pallasea 


segment 6, which is twice as long as segment 5. Uropod 3 in J !/,, in 
Q '/, as long as body, rami subequal, fringed with plumose setae. Telson 
much shorter than pedunele of uropod 3, rounded pentagonal, apical border 
almost truncate or faintly concave. Colour dark grey brown, with brighter 
markings and stripes, a dark stripe along the back, carinae darker than the 
rest of the body, often those to the rear red. L. 17 mm. 


Lake Baikal. Depth 10 m. 
2. P. reissnerii (Dyb.) 1874 Gammarus r., B. Dybowsky in: Horae Soc. ent. 
Ross., v.10 suppl. p. 126 t.3 f.1; t.4 £.7 | 1893 Pallasea? reissneri, A. Della Valle in: 


F. Fl. Neapel, v.20 p.930 | 1899 P. reisnerii, T. Stebbing in: Tr. Linn. Soc. London, 
ser.2.v.7 p. 422. 


Peraeon segments 1—3 with 2 rather remote median tubereular carinae, 


which dwindle away on segments 4 and 5, and are replaced by a single. 


carina on segment 6, which gradually encreases in height to pleon segment 3, 
successively more clearly divided by a saddle-shaped depression of the upper 
margin into 2 halves, of which the hinder is tooth-Iike, and on pleon 
segment 3 bent forward as a hook; pleon segment 4 with a tubereular 
keel, segments 5 and 6 quite flat. Peraeon segments 1—7 have marginal 
keels, perhaps representing a coalescence of marginal with subdorsal processes, 
the processes on segments 1—5 tolerably long and acute, on segments 
6 and 7 blunt, tubereular. The swellings on the pleon segments are feebly 
indicated. Head, rostral point insignificant, upper surface rough, separated 
from the sides by ridges which have tolerably high, flat teeth at the ends; 
there is a lateral swelling above the eyes, and below and somewhat behind 
them a flat, double-pointed process. Eyes small, irregularly reniform, white. 
Antenna 1 half as long as body, about '/, longer than antenna 2, 1°t joint 
thick, longer than 24 and 34 eömbined, flagellum 32-jointed, accessory flagellum 
3-jointed. Antenna 2, ultimate and penultimate joints of pedunele equal, 
flagellum 12-jointed. Gnathopod 1, 6!" joint slender, piriform, finger short. 
Gnathopod 2, 5th joint longer than in gnathopod 1, 6 joint slender, oblong, 
palm rather oblique, finger short. Peraeopods 3 and 4, 24 joint more or 
less heart-shaped. Peraeopod 5, 24 joint oblong, with rather long setae on 
hind margin, as in peraeopods 3 and 4. Uropod 3, outer ramus about "/, 
longer (not shorter, as misprinted in Dybowsky, p. 126) than the inner, 
24 joint scarcely perceptible. Telson divided beyond the middle, with blunt 
apices (in figure). Colour white with shimmer of brown. L. J 25 mm. 


Lake Baikal. Depth 1300 m. 


3. P. cancellus (Pall.) 1772 Oniscus ce. (Cancer baikalensis Laxman in MS.), 
Pallas, Spic. zool., v.9 p.52 t.3 £.18 | 1781 Gammarus ce., J. C. Fabrieius, Spee. Ins., 
v.1 p.515 | 1874 @. e., B. Dybowsky in: Horae Soe. ent. Ross., v.10 suppl. p. 127 | 1793 
Cancer (Gammarellus) c., J.F.W. Herbst, Naturg. Krabben Krebse, v.2 p.125t.35 f.12 | 
1806 C.(Gammarus) c., Turton in: J. F. Gmelin, Gen. Syst. Nat., v.3 p. 760 | 1825 
Amphithoe c., A. G. Desmarest, Consid. gen. Crust., p.268 | 1830 A. cancella, H. Milne 
Edwards in: Ann. Sei. nat., v.20 p.377 | 1862 Pallasea cancellus (Gammarus latreilli 
Guörin-Möneville in MS.), Bate, Cat. Amphip. Brit. Mus., p.200 t.36 f.1 | 1898 P. ce. 
(part.), A. Della Valle in: F. Fl. Neapel, v. 20 p.755 t.60 f.26, 27 | 1776 Oniscus muricatus, 
Pallas, Reise Ruß., v.3 p. 709. ; 


Peraeon segments 1—7 and pleon segments 1—4 with a weak median 
carina formed by a small tuberele or blunt hump, the humps being strongest 
on the pleon segments. Immediately above the side-plates the margins of 
the peraeon segments form a weak carina, close above which are backward 


ne LEN a 4 A =, . = r ü äh 
ae ns = ra anheben A Na Linn BE ara an heran sn in arte ren ne Wrrilln Bud Die ten 


Pallasea 377 


pointing blunt teeth, successively increasing towards and decreasing from 
those of segment 5, which are bent slightly backwärd and downward, and, 
besides being stronger than the rest, are set nearer to the middle of the 


back. In pleon segments 1—3 the lateral teeth are acute and rather long, 


on segments 4 and 5 they form weak carinae occupying about */, length 
of segment. Head, upper surface smooth, rostrum minute, a flat subacute 
tooth projeeting outward on the under margin of the lateral lobes. Eyes 
reniform or half-moon-shaped, black. Antenna 1 longer than half the body, 
twice as long as antenna 2, 1° joint rather long, 34 shorter than 24, 
flagellum 36—67-jointed, accessory flagellum 4—6-jointed. Antenna 2, 
flagellum 8—14-jointed. Maxillipeds normal (Bate: having a small squami- 
form plate to the ischium only, but his figure shows 24 joint produced as 
well as the 34), Gmathopod 1, 6% joint slender, piriform. Gnathopod 2, 
6% joint more rhomboidal, broader, palm oblique. Peraeopods 3—5, 24 joint 
heart-shaped, with short setae on the hind margin. Uropod 3, rami sub- 
equal. Telson eleft '/, of length, each apex armed with a spinule. Colour 
greenish-brown, or brown with scattered dots. L. J attaining 70 mm to 
end of telson (with antenna 1:108 mm). 

Lake Baikal, near the shore; River Angara. 

4. P. gerstfeldtii (Dyb.) 1874 Gammarus cancellus var. g., B. Dybowsky in: 
Horae Soe. ent. Ross., v. 10 suppl. p.129 t.2 £.1 | 1893 Pallasea c. (part.), A. Della Valle 
in: F. Fl. Neapel, v.20 p.928 | 1899 P. gerstfeldtii, T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 v.7 p.422. 


Resembling P. cancellus, but very strongly developed. On peraeon 
segments 1—4 a median carina of strong blunt teeth, the edge of which is 
often divided in segments 1 and 4; on segment 5 the carina is reduced to 
a little point, on segments 6 and 7 it is broad-based, spine-like, but variable 
in its strength and acuteness. The lateral teeth on peraeon segments 1—4 
acute, successively longer, on segment 5 they are nearer to the median 
line, and appear as reaching high over the body, greatly curved or actually 
uncinate and backward bent, the distance between their tips being twice the 
breadth of the body at the base of the preceding pair of teeth; on segments 
6 and 7 the lateral teeth are sharp; on pleon segments 1—3 they are 
somewhat more bent, successively shorter, and on segments 4 and 5 they 
are simple carinae. At the base of the lateral teeth, or between the latter 
and the median teeth, there is a small tuberele on peraeon segments 6 and 7 
and pleon segments 1—3. As in P. cancellus, there are tubereles and 
spinules on the pleon segments 4 and 5, or 4—6#, the position of which is 
not very clear. Head, the tooth on the under margin of lateral lobes is 
more pointed and somewhat longer than in P. cancellus. Antenna 1, 34 joint 
as long as 24, or somewhat longer. L. attaining 75 mm to end of telson. 

Lake Baikal. Depth 20—50 m. e 


‚5. P. quadrispinosa O. Sars 1861 Gammarus cancelloides (err., non Gerstfeldt 
1858!), S. Loven in: Ofv. Ak. Förh., v. 18 p.287 | 1867 Pallasea ce. var. gvadrispinosa, 
G.O.Sars, Crust. d’Eau douce Norvöge, p.68 1.6 f.21-—-34 | 1876 P.g.. A. Boeck, Skand. 
Arkt. Amphip., v.2 p.375 | 1871 Pallasia q., A. Boeck in: Forh. Selsk. Christian., 1870 
p-207 | 1894 Pgllasiella q., &. O. Sars, Crust. Norway, v.1 p.506 t.178 | 1874 Gammarus 
kesslerii var. europaeus, B. Dybowsky in: Horae Soe. ent. Ross., v.10 suppl. p.135 | 1893 
Pallasea cancellus (part.), A. Della Valle in: F. Fl. Neapel, 0.20 p. 755. 


Median carina wanting, body slender, peraeon segments 1—7 each 


with supramarginal obtuse nodiform prominence; pleon segments 1 and 2 
each with a pair of strong, subdorsal, backward direeted, parallel teeth, wide 


378 Pallasea 


apart, segments 4—6 without faseieles of spinules. Head, rostrum minute, 
lateral lobes smoothly rounded, a boss-like projection overhanging post- 
antennal corners. Side-plates 1—4 rather narrow, not contiguous below, 
4th rather less deep than 34. Pleon segments 1—3, postero-lateral corners 
rounded (as perhaps throughout the genus). Eyes rounded oval, very dark. 
Antenna 1 about '/;, as long as body, 1° joint nearly as long as 24 and 
3% combined, flagellum shorter than pedunele, with about 16 (Sars), with 
24—15 (Dybowsky) joints, accessory flagellum with 2 joints, 24 the longer. 
Antenna 2 rather shorter, ultimate and penultimate joints of peduncle nearly 
equal, flagellum 6- or 7-jointed. Gnathopod 1, 6% joint piriform. Gmatho- 
pod 2 rather more slender, 6% joint oblong oval, palm nearly transverse; 
both pairs of gnathopods in C stronger than in O. Peraeopods 3 and 4, 24 joint 
little expanded, slightly narrowed below. Peraeopod 5, 24 joint larger than 
in preceding peraeopods, oval, fringed behind with setae. Uropod 1, rami 
much shorter than peduncle, smooth. Uropod 2 much shorter than uropod 1, 
rami with smooth sides. Uropod 3, outer ramus fringed with fascieles of 
slender setae, 24 joint minute, inner ramus scarcely more than '/, as’long 
as outer, setiferous on inner margin. Telson a little broader than long, 
3 spinules on each side, emargination '/, of the length, apices rounded, tipped 
with a spinule. Colour yellowish grey, each segment banded transversely 
with. brownish green. L. d 15—19 mm. 

Lakes of Norway (Mjös-Sjö, depth 6—94 m, and others, also River Vorm), 
Sweden, and Russia (Finland, Onega). 


6. P. kesslerii (Dyb.) 1874 Ganmmarus k., B. Dybowsky in: Horae Soc. ent. 
Ross., v.10 suppl. p.133 t.1 f.7 | 1893 Amathilla? k., A. Della Valle in: F. Fl. Neapel, 
v.20 p.929 | 1899 Pallasea k., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 422. 


Near to P. quadrispinosa (p. 377). Median carina represented by small 
tubereles on peraeon segments, peraeon segments 1—5 each with supramarginal 
strong acute tooth, segments 6 and 7 each with only a weak hump over the 
margin; pleon with addition of a little median tuberele on each of segments 1—3, 
and a flat lateral swelling on segment 3. Head, upper surface rough, 
with a median groove, narrowing forward; a strong outward and somewhat 
downward projeeting tooth overhanging post-antennal corners. Side-plates 
carinate. Eyes oval, very prominent, dark brown or black. Antenna 1 half 
as long as body, nearly twice as long as antenna 2, flagellum 20—28-jointed, 
accessory flagellum 2—4-jointed. Antenna 2, 7—9-jointed. Peraeopod 3, 
24 joint sometimes widened below. Uropod 3, inner ramus in adults only 
about '/, shorter than outer, both carrying on their ‘margins numerous setae, 
the majority plumose. Telson very feebly emarginate, and very feebly grooved 
above distally. Colour bright greenish, with black or brownish spots, the 
appendages banded. L. reaching over 37 mm. 


Lake Baikal. Depth 10—20 m. 


7. P. baikali Stebb. 1874 Gammarus lovenii (non @.Ioweni R.M. Bruzelius _ 
1859!), B. Dybowsky in: Horae Soe. ent. Ross., ®.10 suppl. p.137 t.13 f.7 | 1893 
Pallasea cancellus (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p.929 | 1899 .P. baikali, 
T. Stebbing in: Tr. Linn. Soc, London, ser.2 «7 p.'422. 


Median carina wanting, peraeon segments 1—5 with marginal teeth, 
thinner, somewhat longer and more backward eurved than in P. cancelloides 
(p. 380); weak lateral swellings probably represent the lateral carinae;' pleon 
segments without teeth or humps, segments 4—6 each with a couple of small 


* 


Pallasea 379 


‚spinules on hind margin. Head, upper surface a little rough, under margin 
:of lateral lobes produced into an acute tooth. Eyes strongly protuberant, brown. 
‚Antennal nearly "/, as long as body, about '/, longer than antenna 2, peduncle 
‚longer than flagellum, flagellum 26—32-jointed, accessory flagellum 4-jointed. 
‚Antenna 2, flagellum 8-jointed. Gmathopods 1 and 2, 6tk joint piriform. 
‚Peraeopod 5, 24 joint twice as long as broad, narrower than usual in the 
‚genus. Uropod 3, outer ramus about ?/,, longer than inner, both rami setose. 


Ei, ‚Telson rather long, with many lateral setules and shallowly concave apical 


margin. Colour brown, with white spots and bands. L. 33 mm. 
Lake Baikal. Depth 10—50 m. 


8. P. brandtii (Dyb.) 1874 Gammarus b., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p. 136 t.14 f.1 | 1893 Ceradocus? b., A. Della Valle in: F. Fl. Neapel, 
0.20 p.927 | 1899 Pallasea b., T. Stebbing in: Tr. Linn. Soc, London, ser.2 v.7 p. 422. 


 Peraeon and pleon with 2 parallel median rows of tubereles, peraeon 
segments 1—7 each with marginal carina formed by a low, flattened, rounded 
tuberele, above which the lateral humps, successively higher, pass over into 
short, backward directed teeth; corresponding with and continuing the marginal 
and lateral carinae of the peraeon are ridges and teeth on the sides of pleon 
segments 1—3, but on segment 3 the median tubereles and the lateral tooth 
‚are more feebly, while the ridge is more strongly developed than in segments 1 
and 2. Head uneommonly large and tumid, rostrum very short, margin of 
lateral lobe thickened and carinate, a downward direeted boss behind the 
eyes. Side-plates 3—4 have little tubereles.. Eyes round or oval, strongly 
protuberant, as if stalked. Antenna 1 nearly half as long as body, and twiceas 
long as antenna 2, 1% joint thick, 34 variable, never less than half as long as 1, 
longer or shorter than 24, or equal to it, flagellum 30—45-jointed, accessory 
flagellum 4—6-jointed. Antenna 2, flagellum 9—12-jointed. Gnathopod 1,6!" joint 
piriform. Gmnathopod 2, 6! joint oblong, widening somewhat to the oblique 
palm. Peraeopod 5, 24 joint oval, rather wider above than below, marginal 
setae very short. Uropods 1 and 2 with setae on the margins and 1—3 
spinules at the apices of the rami. Uropod 3, inner ramus scarcely shorter 
‚than outer, both earrying many setae. Telson eleft to the middle (beyond 
it in figure), forming 2 tube-like lobes with the apices bent one to meet the 
other. Colour: head, peraeon segments 6 and 7, pleon segments 4—6 bright 
green, other segments brownish. L. reaching 35 mm. 


Lake Baikal. Depth 10—50 m. 


9. P. grubii (Dyb.) 1874 Gammarus g., B. Dybowsky in: Horae Soc. ent. Ross., 
e.10 suppl. p.132 t.1 f.5 | 1898 Crangonya? g., A. Della Valle in: F. Fl. Neapel, v.20 
p: 928 | 1899 Pallasea g., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 422, 


Peraeon segments 1—4 or 1—5 with 2 parallel mredian rows of tubercles 
separated by a groove; on the other peraeon segments the tubercles form. 
a single median row, continued by a weak median carina on pleon segments1—3; 
on peraeon segments 1—5 the marginal carina is represented by thick, broad, 
feebly flattened humps, on segments 6 and 7 by quite feeble, small humps; 
‘the lateral carinae begin on peraeon segment 1 with very weak humps, 
encreasing on the following segments, and on 5—7 or 6 and 7 running out 
into short teeth; pleon segments 1 and 2 have each a pair of long, backward 
bent teeth, as in P. quadrispinosa (p. 377), and segment 3 has a lateral swelling. 
Head, upper surface rough, with median groove, bounded behind by 2 little 
tubereles; the sides below have a boss-like prominence. Eyes roundish oval, 


380 Pallasea, Weyprechtia 


very protuberant, dark brown. Antenna 1 less than '/, as long as body, 
nearly twice as long as antenna 2, 1° joint elongate, flagellum shorter than 
peduncle, 25—29-jointed, accessory flagellum 2- or 3-jointed. Antenna 2, 
flagellum 8-jointed. Gmnathopod 1, 6t% joint piriform. Gnathopod 2, 6% joint 
oblong. Peraeopods 3 and 4, ga joint narrow, heart-shaped; peraeopod 5, 
24 joint oval; long and thick setae on the margin in peraeopods 3—5. 
Uropod 3, outer ramus 4'/, times as long as the short, rudimentary inner 
ramus. Telson with a curved emargination, the upper surface depressed. 
Colour bright brownish green, with a whitish band over the middle of the 
back, often segments 2—4 darker than others; brownish spots occur; appendages 
banded. L. reaching 37 mm. 


Lake Baikal. 


10. P. cancelloides (Gerstf.) 1858 Gammarus c., Gerstfeldt in: M&m. pres. Ace. 
St.-Petersb., 0.8 p.287t.9f.8 | 1874 @. e., B. Dybowsky in: Horae Soe. ent. Ross., v. 10 
suppl. p.130 t.13 f.6 | 1862 ‚Pallasea c., Bate, Cat. Amphip. Brit. Mus., p.380 | 1893 
P. cancellus (part.), A. Della Valle in: F. Fl. Neapel, 0.20 p. 755. 


Peraeon segments 1—7, median carina weak, tubercular, and on 
segments 1—3 inconspicuous, marginal carina more strongly developed than 
the lateral, the teeth directed outward and backward, acute, subequal, about 
twice as long as those of the lateral carina, which are directed backward, 
those of the 6! segment longer than the preceding, those of segment 7 
nearly as long as the marginal teeth; pleon segments 1 and 2 with rather 
weak median carina, and on each side a strong, backward and outward 
bent tooth, longer than the lateral teeth on peraeon, pleon segment 3 with 
median carina flanked by weak humps, segments 4—6 almost smooth. Head 
tumid, with a prominence at the back, and a strong acute tooth projecting 
laterally from each cheek. Side-plate 4 with a weak tubercular projection. 
Eyes very protuberant, oval or broadly reniform, brownish black. Antenna 1 
about ’/, as long as body, about */, longer than antenna 2, 1° joint twice 
aslong as24, 2dtwice aslong as 3, flagellum 22—-26-jointed, accessory flagellum 

3-jointed. Antenna 2, flagellum 8- or 9-jointed. Gnathopods 1 and 2, 6% joint 

piriform, narrower and smaller in 9 than in d. Peraeopods 3 and 4, 
24 joint elongate quadrangular, rather broader above than below, hind margin 
somewhat sinuous. Peraeopod 5, 24 joint oval, hind margin as in peraeo- 
pods 3 and 4 carrying long getae, Uropod 3, inner ramus only about ?/, 
shorter than outer, both with numerous setae, the majority plumose. Telson 
shallowly emarginate. Colour green or whitish green, with brownish black 
or brown spots. L. reaching 28 mm. 


Lake Baikal, under stones elose to the shore; River Angara at Irkutsk. 


8. Gen. Weyprechtia Stuxb. 


1880 Weyprechtia (Sp. un.: W. mirabilis), Stuxberg in: Bih. Svenska Ak., ©.5 
nr. 22 p.27 | 1888 W., T. Stebbing in: Rep. Voy. Challenger, v.29 p.523 | 1894 W., 
T. Stebbing in: Bijdr. Dierk., v.17 p.41. 


Body dorsally smooth. Pleon segment 3, postero-lateral margins biden- 
tate. Antenna 1 the shorter, accessory flagellum 4—7-jointed. Upper lip not 
emarginate. Lower lip, inner lobes not distinet. Mandible, eutting edge 
little or not dentate, accessory plates dentate, spines of spine-row numerous, 
molar powerful, 34 joint of palp not curved, fully as long as 24 and 34 
combined. Maxilla 1, inner plate with setae very numerous, outer with 


Sr De N en Zu Pe JB Ber > Fee 
N ET Sale FAT HE za Dane E 


Weyprechtia 381 


11 spines, 24 joint of palp distally expanded and fringed in part with setae. 
Maxilla2, inner plate with close-set row of setae near the inner margin. Maxilli- 
peds, inner plates transversely truncate, outer scarcely reaching middle of 
palp’s 24 joint, which is little longer than 1° or 34, the finger short, thick, 
acute. Gnathopods 1 and 2 similar, slender, 5th joint at least as long as 
6th, palm ill-defined, finger small. Peraeopods 3--5, 24 joint oval. Uropod 2 
with unequal rami. Uropod 3, rami single-jointed, lanceolate, subequal. 
. Telson entire, longer than broad. 


2 species. 


Synopsis of species: 


Side-plate 4 deeply and doubly emarginate . . » ..... 1. W. heuglini . p. 381 
Side-plate 4 simply emarginate. . . . 2. 22.2. 200. 2. W. pinguis . p. 382 


; 1. W. heuglini (Buchh.) 1874 Amathilla h., Buchholz in: Zweite D. Nord- 
polarf., v.2 p.345 | 1893 A. heuglini, A. Della Valle in: F. Fl. Neapel, v.20 p.685 | 1894 
Weyprechtia heuglini, T. Stebbing in: Bijdr. Dierk., v.17 p.41 t.7 | 1880 W. mirabilis, 
Stuxberg in: Bih. Svenska Ak., v.5 nr.22 p.28. 


Integument erustaceous, back rounded, broad; pleon segment 4 with trans- 
verse depression, of which also segments 1—3 show traces. Head dorsally 
broad, rostrum minute, front angles subtruncate, not very prominent. Side- 
. plates 1—3 narrow, truncate below, 1° with subacute front angle, 4" deeper, 
lower hind angle subacute, a strong downward curved horn dividing the hind 
margin into 2 great eurves. Side-plates I—5 somewhat projecting laterally, 
especially the 2 horns or angles of the 4th. Pleon segments 2 and 3, postero- 
lateral angles acute, segment 3 having a 24 and somewhat more produced 
tooth a little way above that of the postero-lateral angle. Eyes reniform, 
shining, black, curving round from side towards top of head. Antenna 1, 
1 joint scarcely as long as 24 and 34 combined, flagellum twice as long as 
pedunele, attaining 32 joints, accessory flagellum 6- or 7-jointed. Antenna 2 about 
once and a half as long as antenna 1, ultimate and penultimate joints of pedunele 
equal, flagellum nearly twice as long as peduncle, about 40—59-jointed. 
Upper lip broadly rounded, almost truneate. Mandible, eutting edge appa- 
rently undivided (in younger specimens perhaps dentate), accessory plate of 
4 teeth, as usual dissimilar in right and left mandible, 10 spines in spine- 
row, 34 joint of palp with one margin straight, longer than 24 and 34 com- 
bined. Maxilla 1, inner plate with about 30 plumose setae, 24 joint of palp 
distally widened, with several slender spines and setae on inner distal margin. 
Maxilla 2, inner plate with oblique row of about 30 long plumose setae near 
inner margin. Maxillipeds, outer plates, apical margin erowded with plumose 
setae passing over into serrate spines on inner margin.” Gnathopod 1, 24 joint 
the widest, 5tk joint narrow, longer than 6*%, which is rather long and 
narrow with small, indistinet palm, finger longer than palm, faintly serrate 
within, nail eurved, acute. Gmathopod 2 similar, but 5'% joint more widened, 
6‘ nearly as long, palm even more indistinet. Peraeopods 1 and 2 slender. 
Peraeopods 3—5 considerably longer, 4 and 5tk subequal, longer than 34, 
24 joint not very broadly oval, joints 4—7 rather elongate. Uropod 1, rami 
a little unequal, nearly as long as pedunele. Uropod 2, rami longer than 
peduncle, inner longer and broader than outer. Uropod 3, rami broad, 
much longer than peduncle. Telson a little variable, rather longer than 
broad, tapering to faintly emarginate apex, which carries 2 setules, some- 


‘ 
382 Weyprechtia, Paramieruropus. 


times producing a slightly trilobed appearance. L. reaching 51 mm (antenna 2: 
24 mm). 

Arctie Ocean (Spitzbergen; Murman Sea, lat. 69° N., long. 59° E., depth 28m; 
glacial sea of Siberia between Cape Vankarema and Behring Strait, depth 7—11 m). 


2. W. pinguis (Kröyer) 1838 Gammarus pingvis, Kröyer in: Danske Selsk., 
Afh., 0.7 p.252 t.1 f.5 | 1862 Amathia pinguis, Bate, Cat. Amphip. Brit. Mus., p. 200 | 
1871 Amathilla pingvis, A. Boeck in: Forh. Selsk. Christian., 1870 p.218 | 1874 A, 
pinguis, Buchholz in: Zweite D. Nordpolarf., v.2 p.353 t.9 f.2 | 1878 A.p., Miers in: 
Nares, Voy. Polar Sea, v.2 p.246 | 1893 A.p., A. Della Valle in: F. Fl. Neapel, v.20 
p- 684 1.59 f£.89 | 1895 A. p., Ohlin in: Acta Univ. Lund., ©.31 nr.6 p.50 | 1894 
Weyprechtia p., T. Stebbing in: Bijdr. Dierk., 0.17 p.41. 

Closely resembling W. heuglini. Side-plate 4 with single normal 
emargination. Upper lip very large, not divided at the end (broadly conical, 
Buchholz; but ?). Mandible, cutting plate with few teeth on the point (Boeck), 
or completely without teeth (Buchholz). Gnathopods 1 and 2 with very 
oblique, straight, fairly well defined palm, longer than in W. heuglini. 
Peraeopod 4 intermediate in length between peraeopods 3 and 5 (Kröyer: 
a little smaller than 34 or 5). L. 24—29 mm (antenna 2 half this length). 

Aretic Ocean (Greenland, depth 6—56 m; Spitzbergen, a 4—22 m; ceircum- 
A reaching lat. 82° 24°’ N.). 


9. Gen. Paramicruropus Stebb. 
1899 Paramicruropus, T. Stebbing in: Tr. Linn. Soc. London, ser.2 0.7 p.423, 


One of the pleon segments abruptly elevated above the next; pleon. 


segment 6 very small. Antennae 1 and 2 short; antenna 1 the longer, 
accessory flagellum small. Gnathopod 1, 6% joint not smaller than that of 
gnathopod 2.- Peraeopods 1—5 not elongate. Uropods 1 and 2 not very 
long. Uropod 3 ‚rudimentary, rami not very unequal. Telson small, entire. 
2 species. 
Synopsis of species: 
Pleon segment 3 overarching the small 4th segment. . 1. P.solski . . . . p.882 
Pleon segment 4 large, overarching the small 5th segment 2. P. taczanowskii . p. 382 


1. P. solskii (Dyb.) 1874 Gammarus s., B. Dybowsky in: Horae Soe. ent. Ross., 
v.10 suppl. p.42, 153 t.3 f.2 |1893 Amathilla? s., A. Della Valle in: F. Fl. Neapel, v.20 
p.930 | 1899 Paramicruropus s., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.423, 

Description incomplete. All segments (in figure) strongly ridged trans- 
versely, perhaps with exception of the very small pleon segments 4—6. 
Head not rostrate. Pleon segment 3 unusually large, overarching the small 
segment 4, grooved by a deep, horizontal, arched furrow. Eyes small, reni- 
form, black. Antenna 1 a little the longer, '/, as long as the body, pedunele 
shorter than in antenna 2, flagellum 17-jointed, accessory flagellum 3-jointed. 
Antenna 2, flagellum 12-jointed. Gnathopods 1 and 2 have short 5th joint, 
6!h almond-shaped. Peraeopod 1 longer than peraeopod 2; peraeopods 3—5 with 
24 joint narrowly oval, longitudinally carinate. Uropods 1 and 2 feebly developed, 
reaching back almost as far as uropod 3. Uropod 3, rami small, equal. Telson 
apically rounded (ef. Dybowsky’sanalyticalkey). Colour clouded yellow. L.23 mm. 

Lake Baikal. 


2. P.taczanowskii (Dyb.) 1874 Gammarus t., B. Dybowsky in: Horae Soc. 
ent. Ross., v. 10 suppl. p.156 t.14 f.9 | 1893 Acanthonotosoma? t., A. Della Valle in: 
F. Fl. Neapel, v.20 p.930 | 1899 Paramicruropus t., T. Stebbing in: Tr. Linn, Soc. 
London, ser.2 v.7 p.423. 


er 


Paramieruropus, Parapherusa 383 


- 


Head and all the segments dorsally granular, on each segment immediately 
above the side-plates a strongly developed carina, and encireling the back of 
each segment a broad, rib-like, granular, transverse prominence; on pleon 
segment 4 the prominence is divided by a deep longitudinal furrow; segments 5 
and 6 very small, in the © so overarched by segment 4 as to be invisible in a 
side view, in the S more conspieuous. Head with rather long pointed rostrum, 
lateral lobes produced into an acute process as long as rostrum. Side- 
plates 1—4 ‚setose. Eyes point-like, black. Antenna 1 scarcely '/, as long 
as body, but much longer than antenna 2, 1% joint stout, flagellum shorter 
than peduncle, 12-jointed, accessory flagellum 1-jointed. Antenna 2, flagellum 
6-jointed. Gnathopod 1, 6th joint oval, narrowing to finger hinge. Gmathopod 2 
not larger, oblong, in en widening a little to the not very oblique palm. Peraeo- 
pod 5, 24 joint broader below than above, with long setae on both margins. 
Uropods 1 and 2 moderately long (not so long as in figure), reaching beyond 
the rudimentary uropod 3. Uropod 3, both rami very short, conical, with 1 long 
apical seta, inner ramus in 9 !/,,, in Q "/, shorter than outer (figure e difficult 
to reconcile with deseription). Telson broader than long, apical margin concave 
or shallowly emarginate. Colour wax-yellow. L. 10 mm. 

Lake Baikal. Depth 10—50 m. 


10. Gen. Parapherusa Stebb.*) 


1879 Harmonia (Sp. un.: H. crassipes), Harmomia (laps.) (non Harmonia E. 
Mulsant 1846, Coleoptera!), Haswell in: P. Linn. Soc. N.S. Wales, v.4 p.330 | 1883 
Harmonia, Chilton in: Tr. N. Zealand Inst., v.15 p.82 | 1880 Chloris (non Moehring 
1758, Aves!), Haswell in: Ann. nat. Hist., ser.5 v.5 p.33. 

Side-plates shallow. Antenna 1 the shorter, accessory flagellum well 
developed. Mouth-parts normal. Mandible, 24 joint of palp as long as 34, 
but stouter. Maxilla 1, inner plate with about 10 long setae, outer with 
11 spines, 24 joint of palp with 7 or 8 spine-teeth. .Maxilla 2, inner plate 
fringed on inner margin. Maxillipeds, inner and outer plates well armed. 
Gnathopods 1 and 2 subchelate, 24 much the larger in J, but not in ©. 
Peraeopods 3—5 very stout. Uropod 3 very short, rami equal, shorter than 
peduncle. Telson simple. 

l species. 


1. P. erassipes (Hasw) 1879 Harmonia c., Harmomia c., Haswell in: P. Linn. 
Soe. N. S. Wales, v.4 p.330, 349; t.19 f.3 | 1883 "Harmonia c., Chilton in: Tr. N. Zealand 
Inst., v. 15 p.82 1.2 f.5a,h]| 1893 Protomedeia? e., A. Della Valle in: F. Fl. Neapel, 
v.20 p.442 | 1880 Chloris, Haswell in: Ann. nat. Hist,, ser.5 v.5 p.33. 

Pleon segments 5 and 6 very short. Head, lateral lobes rounded, little 
produced. Eyes well developed. Antenna 1 scarcely shorter than antenna 2, half 
as long as body, 24 joint scarcely longer than 1°, 34 short, flagellum rather longer 
than pedunele, about18-jointed, accessory flagellum 8-jointed. Antenna2, ultimate 
and penultimate joints of peduncle equal, flagellum much shorter than peduncle, 
about 10-jointed. Gnathopod 1, 6% joint rather longer than 5", oval, palm 
ill-defined. Gnathopod 2 in J, 5tk joint short, eup-shaped, 6t% very large, 
widening to the well-defined, suboblique, undulating palm, which has a square 
spinuliferous prominence adjacent to finger hinge and a similar but more 
convex one near the middle, finger strong, matching palm. Gnathopod 2 


*), Nom. nov. TTapd, beside, Pherusa (see p.449). — The name Harmonia is 
preoccupied (1846, E. Mulsant, Hist. nat. Col. France, Securipalpes p. 108), also the 
name Chloris (1758, P.H.G. Moehring, Gesl. Vog., p.3, 24). 


384 sygesgirten Amathillopsis 


in 9, gnathopod 1, but with shorter 5tk and longer 6th joint. 
Peraeopods 1 and 2 not very stout. Peraeopods 3—5, 24 joint oblong, 
other joints, including finger, very stout, peraeopods 4 and 5 longer than 
34, Uropods 1—3 not elongate, in uropod 1 rami as long as peduncle, in 
uropods 2 and 3 shorter than peduncle. Telson rather longer than broad, 
sides converging to a truncate apex, which has a setule at each of the blunt 
angles.. Colour brown. L. 4 mm. 


South-Paeifie (Port Jackson [New South Wales], Griffith’s Point [’Vietoria]; 
Lyttelton Harbour, and Timaru [New Zealand]). 


11. Gen. Amathillopsis Heller 


1875 Amathillopsis (Sp. un.: A. spinigera), Cam. Heller in: Denk. Ak. Wien, v.85 
p.85 | 1885 A., G. O. Sars in: Norske Nordhavs-Exp., v.6 Crust.I p.181 | 1888 A., T. 
Stebbing in: Rei; Voy. Challenger, v.29 p.442, 859 | 1894 A., T. Stebbing in: Bijde; 
Dierk., ®. 17 p. 27. 


Integument crustaceous, body dorsally carinate, with several strongly 
produced teeth. Head, rostrum short. Side-plates not very deep. Antenna 1 
the longer, peduncle long, 24 joint as long as 1°, accessory flagellum very 
small. Upper lip with margin entire. Mandible normal, 24 and 34 joints 
of palp long. Maxilla 1, inner plate with 6 or 7 setae, outer with 11 only 
slightly dentieulate spines, 24 joint of palp elongate, armed both on right 
and left maxilla with spines and setae. Maxilla 2, inner plate setose or 
only eiliated on inner margin. Maxillipeds, outer plates small, extending not 
far along the 24 joint of the long palp. Gnathopods 1 and 2 alike, sub- 
chelate, 5tk joint as long as 6!%, palm ill-defined. Peraeopod 5, so far as 
known, the shortest. Uropod 1, rami shorter than peduncle, outer ramus 
shorter than inner. Uropod 3, rami lanceolate, outer a little shorter than 
inner, Telson short, slightly emarginate. 


3 species. 


Synopsis of species: 
1 f Gnathopods 1 and 2, 5th joint distally little expanded . 2. A. affinis . . p.385 
\ Gnathopods 1 and 2, 5th joint distally much expanded —2. 


j Telson much shorter than peduncle of uropod3. . . 1. A. spinigera . p. 384 
\ Telson subequal to peduncle of uropod 3...... 3. A. australis . p. 385 
pP 


1. A. spinigera Heller 1875 A.s., Cam. Heller in: Denk. Ak. Wien, 0.35 p.85 
t.3 £.17—22; t.4 f.1—8 | 1885 & 86 4A. s., G.O. Sars in: Norske Nordhavs-Exp., 0.6 
Crust. I p.181 t.15 f.2; Crust. II p.61 | 1888 A. s., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.442, 865 | 1894 A. s., T. Stebbing in: Bijdr. Dierk., v.17 p.28 | 1893 Amathilla s. 
(part.), A. Della Valle in: F. Fl. Neapel, 0.20 p. 684 t.59 f. 88. 


Peraeon broad, pleon ecompressed; body carinate faintly on head, and thence 
strongly to pleon segment 4, peraeon segment 1 with 2 upstanding acute 
processes, the other carinate segments each with one, successively larger to 
that on pleon segment 2, the next a little, and the next again much smaller 
than that preceding it. Peraeon segments 1—4 with lateral margins produced 
outward in acute processes. Head, rostrum very short, slightly deflexed, 
not projeeting ‘beyond the lateral corners which are quadrate, bases of 
antenna 2 conspicuous in the incision below. Side-plate 1 small, faintly 
emarginate below, 24—4th strongly emarginate below between 2 acute points, 
5th subequal to 4th in depth and much broader, both lobes acute, 6! with 


Amathillopsis 385 


only hind lobe acute. Pleon segments 1-—3, postero-lateral corners acutely 
produced, less in 39 than in 1% and 24. Eyes yellowish white, very small, 
oval, prominent, adjacent to a cavity in the lateral corners of head. Antenna 1, 
joints 1 and 2 long, subequal, 39 about "/, as long as 24, flagellum rather longer 
than pedunele, with a great number of very short joints, accessory flagellum 
spine-like, 24 joint minute. Antenna 2 rather shorter and more slender, 
basal joints short and stout, ultimate joint of pedunele shorter than penultimate, 
flagellum rather longer than pedunele and, as in antenna 1, calceoliferous. 


8  Mandible, 3% joint of palp very little shorter than 24. Maxilla 1, outer 


plate has 12 spines (Heller; but 11°). Maxilla 2, inner plate with setae 
on inner margin. Maxillipeds, outer plates with short spine-teeth on inner 
margin, continued in longer forms round the apical margin. Gmnathopod 1, 
5th joint narrow proximally, then much widened, wider than the oval sub- 
fusiform 6", both setose on hind margin, finger long, eurved. Gnathopod 2 
with 5% joint wider and rather longer, its distal lobe more rounded, 6! joint 
slightly longer than in gnathopod 1, but searcely differing. Peraeopods 3—5, 
24 joint scarcely (in peraeopod 5 a little more) expanded, sharply carinate 
behind and produced into a small distal tooth, peraeopod 4 shorter than 34, 
and 5tk shorter than 4%, Uropods 1—3, peduncle and rami with sharp margins, 
outer ramus shorter than inner, especially in uropod 2. Uropod 3, rami 
nearly equal to one another and to pedunele. Telson much shorter than 
peduncle of uropod 3, a little hollowed on surface, rather longer than 
broad, apically a little widened and emarginate between the rounded corners. 
Colour straw-yellow, mouth-parts and front legs vivid red. L. reaching 57 mm 
from rostrum to end of uropod 3; (antenna 1: 43 mm). 

Aretie Ocean (Spitzbergen, Franz Josef Land); North-Atlantie (lat. 63°— 76° N.). 
Depth 240—1408 m. 


2. A. affinis Miers 1881 A.a., Miers in: Ann. nat. Hist., ser.5 7 p.48 t.7 
f.3—5 | 1888 A. a., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 865 | 1893 Amathilla 
spinigera (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 684. 


Agreeing in many respeets with A. spinigera. Side-plates not so 
distinetly emarginate, 4"! much more developed. Antenna 1, 34 joint relatively 
shorter than in A. spinigera, flagellum very long and slender, accessory flagellum 
‚very minute. Antenna 2 little more than half as long as antenna 1. Gmathopods 
1 and 2 slender and feeble, 5" joint gradually widening to the distal end, 
which forms no lobe, 6! joint as long and wide, oblong, slightly widened 
at the palm, which is much shorter than hind margin, finger short in 
proportion. Gmathopod 2 rather the longer. In all the legs 24 joint oblong 
oval, much more expanded than in A. spinigera. Telson not distally widened. 


Aretie Ocean (Franz Josef Land). 5 


3. A. australis Stebb. 1883 A.a., T. Stebbing in: Ann. nat. Hist., ser.5 vo. 11 
P-205 | 1888 A. a., T. Stebbing in: Rep. Voy. Challenger, v.29 p.860 t.65 | 1893 Ama- 
thilla spinigera (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 684. 


Peraeon broad, pleon compressed. Carina indicated on head, peraeon 
segments 1—4, pleon segments 4—6; on peraeon segments 5—7 and pleon 
segments 1—3, prolonged into acute processes, successively larger. Head, 
rostrum small, deflexed, not projecting so far as the lateral corners. Side-plates 
3 and 4 deeper than the rest, acute at lower front corner. Pleon segments 
2 and 3, postero-lateral corners acutely produced. Eyes not perceived. 

Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda 1. 25 


386 Amathillopsis, Gammarellus 


Antenna 1, 1° and 24 joints equal in length, 34 rather longer than '/, of 
24, flagellum broken, the remnant as long as 1°! joint of pedunele, containing 
50 short joints, accessory flagellum seemingly represented by a strong, flat, 
incurved spine. Antenna 2 less robust, similar to that of A. spinigera, 
flagellum incomplete, with 70 joints, as in antenna 1 calceoliferous. Epistome 
carinate. Upper lip, with the rounded margin flattened at centre. Lower lip 
probably without inner lobes. Mandible, accessory plate much stronger on 
left than on right mandible, 34 joint of palp considerably longer than 1% and 
24 combined. Maxilla 1, inner plate with 7 setae, outer with 11 spines. 
Maxilla 2, inner plate merely eiliated on inner margin. Maxillipeds, inner 
plates short, outer reaching little beyond 1° joint of palp, inner margin 
denticulate, with submarginal spinules, apical margin with long spines, palp 
elongate. Gnathopods 1 and 2, 24 joint with distal half much expanded 
behind, rest of limb as in A. spinigera. Peraeopods 1 and 2, 24 joint with 
hind margin a little expanded. Peraeopods 3—5 imperfect, 24 joint carinate 
on front and hind margins, a little expanded behind proximally and in front 
distally, shorter in 4% than 34, and in 5tk than 4%, with proximal expansion 
encreasing. Pleopods with numerous cleft spines on 1°t joint of inner ramus. 
Uropod 1, pedunele longer than rami, outer ramus a little the shorter. Uropod 2, 
pedunele shorter than inner ramus. Uropod 3, pedunele much shorter than 
the lanceolate rami, of which outer is slightly the shorter. Telson subequal to 
peduncle of uropod 3, longer than broad, slightly narrowing to the weakly 
emarginate apex. L. about 38 mm. 

‚Coral Sea (between Australia and New Guinea, lat. 12% S., long. 145° E.). Depth 
2560 m. 


12. Gen. Gammarellus Herbst 


1793 [Subgen.] Gammarellus (part.), J. F. W. Herbst, Naturg. Krabben Krebse, 
v.2 p.106 | 1899 @., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.423 | 1837 Amathia 
(Sp. un.: A. carinata) (non Lamouroux 1812, Hydrozoa!), H. Rathke in: M&m. pres. Ac. 
St.-Petersb., 0.3 p.375 | 1862 Grayia (Sp. un.: @. imbricata) (non Alb. Günther 1858, 
Reptilia!), Bate (& Westwood), Brit. sess. Crust., v.1 p.151 | 1862 Graya (non C. L. 
Bonaparte 1856, Aves!) (part.), Bate, Cat. Amphip. Brit. Mus., p. 101; t. 14a, 16 | 1895 
Grayia, A. O. Walker in: Ann. nat. Hist., ser.6 ».15 p.466 | 1862 Amathilla, Bate & 
Westwood, Brit. sess. Crust., v.1 p.859 | 1893 A. (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p.683 | 1894 A., T. Stebbing in: Bijdr. Dierk., v.17 p.40 | 1894 A.. G. O. Sars, 
Crust. Norway, o.1 p. 489. 


Body dorsally carinate. Antennae 1 and 2 subequal, ind calceoliferous, 
accessory flagellum 4—7-jointed. Upper lip not emarginate. Lower lip, 
inner lobes not distinet. Mandible normal, both plates dentate, spines of 
spine-row numerous, 34 joint of palp faleiform, armed on both margins. 
Maxilla 1, inner plate with setae numerous, outer with 11 spines, 24 joint 
of palp scarcely expanded distally. Maxilla 2, inner plate fringed near inner 
margin. Maxillipeds, outer plates well armed, not reaching middle of palp's 
24 joint, 39 joint of palp notably smaller than 24, very setose. Gmathopods 1 
and 2, 5th joint cup-shaped, 6tk much larger, oval, palm feebly defined, 
finger strong. Peraeopods 1—5 rather stout, 24 joint oval in last three. 
Branchial vesieles pleated obliquely. Uropod 3, rami single-jointed, lanceolate, 
outer a little the longer. Telson feebly emarginate. 

2 accepted and 1 doubtful species. 


Synopsis of the accepted species: 


Dorsal carina of some segments produced backward .. . 1. G.homari . . p.887 
Dorsal carina of no segment produced backward . . . . . 2. G. angulosus . p. 387 


N. 


I ee 


CH ET ING a 


T. 


a 


Gammarellus 387 


‚1. G.homari (F.) 1779 Astacus h., J.C. Fabrieius, Reise Norweg., p.247 | 1788 
Cancer (A.) h., J. F. Gmelin, Syst. Nat., v.1 p.2986 | 1798 Gammarus h., J. ©. Fabrieius, 
Ent. syst., Suppl. p.418 | 1888 Amathilla h., T. Stebbing in: Rep. Voy. Challenger, v.29 
p-45 ete. | 1893 A.h. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 685 t.59 f. 90 | 
1894 A. h., T. Stebbing in: Bijdr. Dierk., ©.17 p.40 | 1894 A. h., G. ©. Sars, Örust. 
Norway, v.1 p.490 t.172, t.173 £.1 | 1895 A. h., A.O. Walker in: Ann. nat. Hist., ser. 6 
v.15 p.466, 471 | 1899 Gammarellus h., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 


9.7 p.423 | 1780 Oniscus arenarius (non Slabber 1769!), ©. Fabrieius, Fauna Groenl., 


p- 259 | 1887 Amathilla arenaria, H. J. Hansen in: Vid. Meddel., ser. 4 v.9 p. 149 |,1798 
Cancer (Gammarellus) homari + C. (@.) arenarius, J. F. W. Herbst, Naturg. Krabben 
Krebse, ©.2 p.113; p.133 | 1819 Gammarus sabini, Leach in: John Ross, Voy. Baftin’s 
Bay, app. p. 68 | 1862 Grayia imbricata + Amathilla s. (part.), Bate & Westwood, Brit. 
sess. Örust., v.1 p.152; p.361 f. | 1874 A. s., Buchholz in: Zweite D. Nordpolarf., v.2 p.346 
Crust. t.8£.1,2; .9 £.1 | 1827 Gammarus marinus (err., non Leach 1815!), G. Johnston 
in: Zool. J., v.3 p.176 | 1828 @. carinatus (non J.C. Fabrieius 1793!), G. Johnston 
in: Zool. J., v. 4 p.52 | 1857 Amathia carinata, A. White, Hist. Brit. Urust., p. 182 | 
1851 Amphitho& moggridgei, Bate in: Ann. nat. Hist., ser.2 v.7 p.318 t. 10 f.10 | 1862 
Grayia imbricata, Graya i. + Amathia sabinii + A. carino-spinosa (part.), Bate, Cat. 
Amphip. Brit. Mus., p. 101 t.16 f.4; p. 197 t.35 £.9; p.199 t.35 £.11. 

Body robust in O0, more compressed in d. Peraeon segments 1—7 
and pleon segments 1—3 with compressed dorsal carina produced more or 
less backward, that of peraeon segment 1 rather broad and also a little 
acutely produced forward; pleon segment 4 with a transverse dorsal “depression 
followed by a carina. In the young the dorsal prominences are much 
less marked. Head depressed, rostrum small, lateral corners obtusely 
truncate. Side-plates 1—4 suecessively larger, but in young 1°% little 
smaller than 24 or 34, Side-plate 4 emarginate behind. Pleon segment 3, 
postero-lateral corners quadrate. Eyes large, oblong reniform, dark brown. 
Antenna 1 in O about '/, aslong as body, 1° joint not as long as 2dand 34 combined, 
22 not much longer than 34, flagellum once and a half as long as peduncle, with 
40—55 setulose joints, accessory flagellum 6- or 7-jointed. Antenna 2 a 
little shorter, ultimate joint of peduncle shorter than penultimate, flagellum 
subequal to pedunele, 40-jointed, setulose and ealceoliferous. Antenna 2 in C 
more slender than in O0, rather longer than antenna 1, pedunele longer 
than flagellum. Gnathopods 1 and 2, 6! joint oval, narrowing to hinge of 
finger, palm setose and spinose. Gmathopod 2 the larger. Peraeopod 5, 
24 joint larger than in peraeopods 3 and 4, its hind margin sinuous below. 
Uropod 3, outer ramus rather the larger, both rami setose on inner margin. 
Telson rather longer than peduncle of uropod 3,.much longer than broad, 
tapering to a rounded apex, in the centre of which is a little emargination 
flanked by a pair of spinules. Colour variable, olive-green or white miarbled or 
banded with brown or red. I. variable, reaching 44 mm (antenna 2 JS: 20 mm), 

Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (Greenland, Spitzbergen, 
Murman Coast, Aretie America, Norway, British Isles, France); Kattegat. Depth 0—206 m. 


2. G. angulosus (H. Rathke) 1843 Gammarus a., H. Rathke in: N. Acta Ac. 
Leop., v. 201 p. 72 t.3 f.3 | 1855 @. a., W.Liljeborg in: Vetensk. Ak. Handl., 
1853 p. 447 | 1871 Amathilla angulosa, A. Boeck in: Forh. Selsk. Christian., 1870, 
p-217 | 1894 A.a., G.O, Sars, Crust. Norway, v.l p.492 t.173 f.2 | 1899 Gamma- 
rellus angulosus, T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p.423 | 1862 Amathia 
carino-spinosa (part.), Bate, Cat. Amphip. Brit. Mus., p.199 | 1862 Amathilla sabini (part.), 
Bate & Westwood, Brit. sess. Crust., v.1 p.862 | 1898 A. homari (part.), A. Della Valle 
in: F. Fl. Neapel, v.20 p.685 | 1895 A. h., A. O. Walker in: P, Liverp. biol. Soe., v.9 p.307. 


Often confounded with but distinet from G. homari. Body short and 


 stout, in front angular, behind dorsally carinate, but carina in each segment 


25* 


388 Gammarellus, Euerangonyx 


truncate, not produced into a tooth, integument very minutely squamose. 
Head, rostrum short, obtuse, lateral corners evenly rounded. Side-plate 5, 
hind lobe deeper than front. Pleon segment 3, postero-lateral corners 
obtusely angular. Eyes oblong, dark brown. Antennae 1 and 2 subequal. 
Antenna 1, flagellum 21-jointed, accessory flagellum 4- or 5- jointed. Antenna 2, 
flagellum 22- or 23-jointed. Gnathopods 1 and 2, exactly alike both in size 
and structure (Sars). Peraeopods 1-5 short and stout, subequal. Peraeopod 5 
the longest, 24 joint with hind margin not sinuous. Uropod 3 less setose 
than in G.homari (p. 387). Telson oval quadrangular, scarcely longer than broad, 
little tapering, with a small apical emargination flanked by a pair of spinules. 
Colour olive-green (Liljeborg), or yellowish, mottled with reddish brown (Sars). 
L. reaching 12 mm. 


Arctie Ocean, North-Atlantic, North-Sea and Skagerrak (Vardö [North-Norway], - 


South- and West-Norway., Bohuslän); Kattegat. French and British localities 
doubtful. 


G. carinatus (H. Rathke) 1837 Amathia carinata, H. Rathke in: M&m. pres. 
Ace. St.-Pötersb., v.3 p.375 t.5 f.29-—-35 | 1862 A.c., Bate, Cat. Amphip. Brit. Mus,., 
p. 198 t.35 f.10 | 1868 Amathilla e., Ozerniavski in: Syezda Russ. Est., Syezda 1 Zool. 
p.151 | 1899 Gammarellus carinatus, @. homari (part.)?, T. Stebbing er Tr. Linn. Soc. 
London, ser.2 v.7 p. 423. 


Probably synonym to G. homari (p. 887). Carina only on peraeon segments 5—7 
and pleon segments 1—3. L. about 15 mm. 


Black Sea. 


13. Gen. Eucrangonyx Stebb. 


1899 Euerangonys, T. Stebbing in: Tr. Linn. Soc. London, ser. 2 v.7 p. 4283. 


Like Crangonyx (p. 370) in general, but with a small inner ramus to 
the 34 uropod, telson emarginate. 


5 species, 


Synopsis of species: 


1 Telson elongated in d, not n® ........ 1. E. mucronatus . p. 388 
Telson alike ind and @ — 2. 
Er WE een ae 2. E. vejdovskyi . p. 389 
Eyes devoid. of black pigment. .. - ....2.. 3. E. packardii . . p. 389 
Eyes with black pigment — 38. 
! Side-plate 4 not unusually large .. .. 2... 4, E.gracilis. . . p.390 
Side-plate 4 unusually large . ......».. 5. E. antennatus . p. 390 


1. E. mucronatus (S. A. Forb.) 1876 Orangonyx m. S. A. Forbes in: Bull. 
Illinois Mus., v1 p.6.£.1—7 | 1888 ©. m., Packard in: Mem. Ac. Washington, v.41 
p- 37 t.5 f.15 | 1893 ©. m., A. Della Valle in: F. Fl. Neapel, v.20 p. 682 | 1894 C. m., 
Chilton in: Tr. Linn. Soc. London, ser.2 v.6 p.219 | 1899 Eucrangonyx m., T. Stebbing 
in: Tr. Linn. Soc. London, ser.2 v.7 p. 4283. 


Pleon segments 1—3, postero-lateral corners broadly rounded. Eyes 
wanting. Antenna 1 in d sometimes *, as long as body, 1° and 24 joints 
subequal, 34 !/, as long as 24, flagellum about 5 times as long as peduncle, 30— 
35-jointed, 2-jointed accessory flagellum a little longer than 1°* joint of primary. 
Antenna 2, ultimate and penultimate joints of peduncle subequal, flagellum 9- or 
10-jointed. Antenna 1 in © about half length of body, flagellum thrice as 
long as peduncle. Upper lip well rounded. Mandible with several spines in 


nr 
en 
Te 


; 


Euerangonyx 389 


spine-row, 1° joint of palp longer than broad, 34 fully as long as 24, 
curved. Other mouth-parts agreeing with those of Crangonyx flagellatus 
(p. 371). Gnathopod 1 in CS, 5t& joint subtriangular, °®/, as wide as 6th, 
6! broadly ovate, °/, as wide as long, hind margin very short, palm oblique, 
not sharply defined, fringed with about 15 notched spines. Gnathopod 2, 
5th joint as wide as 6%, rather longer than in gnathopod 1, 6% joint also 
a little longer and narrower. In Q gnathopod 1 has hind margin longer, 
palm shorter, and gnathopod 2is decidedly smaller than gnathopod 1. Peraeopod 3 
about ?°/, as long as peraeopod 5, peraeopod 4 intermediate in length, 24 
joint in all narrowly oval. Uropod 1 extending beyond uropod 2, and 24 
beyond 34, Uropods 1 and 2 stout, each with subequal rami, shorter than 
peduncle. Uropod 3 short, outer ramus half as long as peduncle, inner 
ramus rudimentary, unarmed, '/, or '/, as long as outer. Telson in J 
smooth, cylindrical, apieally rounded and tipped with spinules, normally 
about as long as pleon segments 1—3, sometimes half as long as the body. 
In © it is only little longer than broad, extending to apex of uropod 3, 
flattened, slightly emarginate, with 2 terminal elusters of 4 or 5 spines. 
Golourless. L. 9—10 mm. 
Illinois. Well at Normal, and in springs. 


2. E. vejdovskyi Stebb. 1896 Crangonyx subterraneus (err., non Bate 1859)), 
Vejdovskf in: SB. Böhm. Ges., nr. 10 p.12 t.1—3 | 1899 Euerangonyx vejdovskyi, T. 
Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 423. 

Oo. Side-plate 4 much deeper than those which follow, broad, emarginate, 
lower margin erenulate. Pleon segments 1—3, postero-lateral corners rounded. 
No trace of eyes, but variable orange-or lemon-coloured pigment-masses in 
their place. Antenna 1, 1° joint not as long as 24 and 34 combined, 34 
in figure even longer than 24, flagellum somewhat longer than peduncle, 
with 9—13 joints; accessory flagellum, 1° joint twice as long as 24. Antenna 2 
shorter, ultimate joint of peduncle (in figure) much shorter than penultimate, 
flagellum 3—-5-jointed. Lower lip, inner lobes (in figure) not very distinet, 
mandibular processes unusually prolonged. Mandible, 24 joint of palp broad, 
considerably longer than 34. Maxilla 1, inner plate with 4 setae, outer with 6 (7?) 
spines. Maxilla 2, inner plate with setae near the inner margin. Maxillipeds, outer 
plates not reaching the middle of palp’s 24 joint, palp’s 4!" joint with a nail. 
Gnathopods 1 and 2, 5th joint shorter than -6tk, distally nearly as wide, 
6! rectangular, nearly twice as long as broad in gnathopod 1, and more than twice ” 
as long as broad in gnathopod 2, palm convex, not very oblique, much shorter 
than hind margin, finger with nail. Peraeopods 1 and 2 very slender, said to 
be slightly longer than peraeopods 3—5, which have the 24 joint oval, with serrate 
margins, the 4! rather long and distally somewhat widened. Uropod 1, pedunele 
as long as the equal rami. Uropod 2, peduncle shorter than the rami. Uropod 3, 
pedunele half as long as outer ramus, which carries 6 or 7 spines, inner 
ramus rudimentary, flattened, shorter than peduncle. Telson almost square, 
apex with rounded emargination, and 5 or 6 spines on either side. Accessory 
branchiae on peraeon segments 5—7 latero-ventrally inserted somewhat 
behind the basal joint of the peraeopod, direetly behind the primary branchiae. 
L. 4 mm. BIT 

Wells near Prague. 


3. E. packardii (S.I. Sm.) 1873 Orangonyx vitreus (err., non Stygobromus v. 
E.D.Cope 1872!), Packard in: Rep. Peabody Ac., 0.5 p.95 | 1888 C. packardii, (S. I. Smith 
in:) Packard in: Mem. Ae. Washington, ».4I p.85 t.5 f.5—11 | 1899 Euerangonyx P., 
T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p. 423. 


390 Euerangonyx 


Eyes small, round, without dark pigment. Antenna 1, 1° joint little longer 
than 24, 34 ®/, as long as 2%, flagellum not twice as long as peduncle, with 
14 joints, accessory flagellum not longer than 1° joint of primary. Antenna 2, 
ultimate and penultimate joints of peduncle equal, flagellum of few joints. 
Gnathopod 1 (in ao 5 mm long), 5" joint trapezoidal, 6" oblong, palm 
little oblique, much shorter than hind margin; gnathopod 2 similar, but 
6th joint longer, with more oblique palm. In largest OÖ gnathopod 1 has a 
more triangular 5!" joint and the 6! more expanded, bar 2 thau the dt, 
and gnathopod 2 also has the palm much more oblique and longer than 
hind margin. Peraeopods 1—5 differ from those in E. gracilis in having the 
spines more numerous, longer and more slender. Uropods 1 and 2 have 
the spines shorter and more obtuse than they usually are in E. graeilis, but 
otherwise these 2 closely allied species agree in uropods and telson. L. reaching 
75 mm. 

Indiana (wells in Orleans and at New Albany). 

4: E. gracilis (S. I. Sm.) 1871 Crangonys g., S. I. Smith (& A. E. Verrill) in: 
Amer, J. Sei., ser.8 ©.2 p. 453 | 1898 C. g., A. Della Valle in: F. Fl. Neapel, v.20 p. 682 | 
1894 ©. g., Chilton in: Tr. Linn. Soe. London, ser. 2 0.6 p.218 | 1899 Eucrangonyx g., 
T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p. 423. 

Pleon segments 1—3, postero-lateral corners produced and endingin a small 
tooth. Eyes slightly elongated, composed of a few black: facets. Antenna 
1 rather more than half as long as body, 1° and 24 joints subequal, 39 ?/, as long 
as 24, flagellum not twice as long as peduncle, with about 20 joints, accessory 
flagellum as long as 1 joint of primary. Antenna 2 about half as long as 
antenna 1, ultimate and penultimate joints of peduncle long, subequal, flagellum 
rather shorter than peduncle, 7- or 8-jointed. Gnathopods 1 and 2 of Q asin 
E. packardii (p. 389). In S gnathopod 1 has palm slightly oblique, strongly 
spined, gnathopod 2 has 6th joint proportionally shorter than in Q, encreasing 
considerably in breadth distally, palm much more oblique, slightly arcuate 
and spinose. .Peraeopod 5 slightiy ve than peraeopods 3 and 4, 24 joint in all 
having hind margin serrate. Uropod 3 reaching apex of uropod 3, outer ramus 
nearly twice as long as peduncle, armed with a few slender spines, inner 
minute, unarmed, shorter than diameter of outer. Telson scarcely as long as 
peduncle of uropod 3, a little broader than long, apical margin with a trian- 
gular emargination, on either side of which the extremity is truncate, and armed 
with three ‚spines. L. © 6—7, 0 ,5—14 mm. 

North-America (Lake Superior, Lake Huron). 


5..E. antennatus (Pack.) 1881 Crangonyx a., Packard in: Amer. Natural., 
0.15 p.880 | 1888 C.a., Packard in: Mem. Ae. Washington, 0.41 p.36 t.5 f.12, 14; textf. | 
1893 CO. a., A. Della Valle in: F. Fl. Neapel, v.20 p.682 | 1899 Eucrangonyx a., T. 
Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 423. 

Side-plates 1—4 very unequal, 1 very small, 4 unusually large and 
nearly square, but seemingly much excavate behind. Pleon segments 1—3, 
postero-lateral corners subacute. Eyes distinet, well developed, black, but 
not so distinet and only '/, as large as in E. gracilis. Antenna 1 nearly 
”), as long as the body, 24 joint of peduncle is said to be much longer 
than in E. gracilis, 34 rather more than half 24, flagellum 20—24-jointed. 
Antenna 2 (in figure) not '/, as long as antenna 1. Gnathopods land 2 and peraeo- 
pods 1—5 apparently as in E. gracilis, as also uropods 1—3 and telson, but 
rami of uropods are said to be slightly stouter and more polished, and the 
spinules a little stouter. Colour purplish. L. 6—7 mm. 


Tennessee (subterranean stream of Nickajack ÜUave). 


nn 


u ae a 2 


u Tee mes B a a ale a ra u ae 


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De di 


Axelboeckia 391 


14. Gen. Axelboeckia Stebh. 


1894 Boeckia (Sp. un.: B. spinosa) (non A. W. Malm 1871)), (O. Grimm in MS.) 
G. O. Sars in: Bull. Ae. St.-Pötersb., ser.5 v.1 p.182 | 1899 Axelboeckia, T. Stebbing 
in: Tr. Linn. Soc. London, ser.2 v.7 p. 423. 


Integument crustaceous, body robust, with median and marginal carinae, 
pleon segments 5 and 6 small. Head rostrate. Side-plates 1 and 4 shorter 
than 24 or 34, 4th not very broad, nor much emarginate behind. Antenna 1 
the longer, with accessory flagellum. Mouth-parts nearly as in Gammarus 
(p. 460), but apex of upper lip scarcely emarginate, lower lip with broad 
principal lobes separated by rudiments of inner lobes. Maxilla 1 on right 
has apex of palp expanded, denticulate, on left narrower, with a few 
slender spines. Maxillipeds, 34 joint of palp distally expanded. Gnathopods 
l and 2 nearly alike, small, subchelate, stronger in J than in ©. Peraeopods 
1—5 differing little in length. Peraeopods 3 and 4, 24 joint narrow. 
Peraeopod 5, 24 joint broadly expanded. Branchial vesicles broad, with 
narrow attachment. Uropods 1—3 successivelv smaller. Uropod 3 short, peduncle 
short, outer ramus l1-jointed, inner shorter. Telson very small, unarmed, not 
deeply cleft. 


2 species. 
Synopsis of species: 


Antenna 1, accessory flagellum 1-jointed . ». »..... 1. A.spinosa . . p.391 
Antenna 1, accessory flagellum with more than 1 joint. . 2. A. carpenterii. p. 392 


1. A. spinosa (O. Sars) 1894 Boeckia s. (B. nasuta, B. hystrix), (0. Grimm 
in MS.) G.O. Sars in: Bull, Ac. St.-Petersb., ser.5 v.1 p.183 t.1, 2 | 1899 Axelboeckia ’s., 
T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 424. 


Body extremely stout in Q, less so in d. Back obtusely carinate 
throughout, peraeon segments each with spiniform process on each side near 
side-plates, in segment 5 very large, acute, the others smaller and rather 
obtuse; pleon segments I—4 with a pair of subdorsal, upturned processes, 
segment 4 overlapping 5: and 6th, and ending in a rather large, hooked, 
median projeetion. Young speeimens have all processes of head and body 
digitiform, ending obtusely, and the dorsal prominences more strongly 
elevated, giving the back a serrated appearance Head slightly keeled, 
rostrum horizontal, forming an equilateral triangle, lateral lobes acute, longer 
than rostrum, diverging nearly at a right angle. Side-plate 1 setose, curved 
forward, 4 obliquely truncate below emargination. Pleon segment 3, 
postero-lateral angles obtusely quadrate. Eyes small, rounded, dark, wide 
apart. Antenna 1 not long. 1° joint as long as 24 and 3% combined, 3% nearly 
as long as 24, flagellum twice as long as peduncle, with about 25 short, setose 
Joints, accessory flagellum an extremely small nodule, carrying 2 setules. 
Antenna 2 much shorter, bent back, ultimate joint of pedunele shorter than 
penultimate, flagellum 9-jointed. Gnathopods 1 and 2 in J, 6" joint much 
wider than 5%, hind margin armed with forward curving spines and forming 
a broadly rounded lobe where it meets the deeply eoncave palm, finger 
strongly curved, impinging within the lobe. Gnathopods 1 and 2 in © 
comparatively small, 6% joint about as long as 5t", and scarcely broader, 
palm in gnathopod 1 somewhat oblique, in gnathopod 2 nearly transverse, 
finger not strong, matching palm. Peraeopods 3 and 4 rather longer than 
the rest, 24 joint little expanded, slightly tapering distally. Peraeopod 5, 
24 joint nearly straight in front, strongly expanded behind with curved hind 


392 Axelboeckia, Brachyuropus 


margin. Uropod 1 much the longest, rami subequal, slightly longer than 
peduncle. Uropod 2, rami subequal, longer than peduncle. Uropods 1—3 
very slightly armed. Telson extremely small, broadly triangular, length not 
half the breadth, incision about to the middle, apices rounded. L. C@ 25, 
Q 20 mm. 


Jaspian Sea. Depth 13—282 m. 


2. A. carpenterii (Dyb.) 1874 Gammarus c., B. Dybowsky in: Horae Soe. 
ent. Ross., v. 10 suppl. p. 113 t.13 f.2 | 1899 Axelboeckia c., T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 v.7. p.424 | 1893 Amathilla homari (part.)?, A. Della Valle in: F. Fl. 
Neapel, v.20 p. 928. 


All segments with a median carina, low and divided by a transverse 
depression; all segments with hind margin more or less thickened, the 
thiekening on peraeon segments 1—3 and pleon segments 1—3 carrying 
very small -tubereles, representatives of lateral carinae; all segments with 
marginal swellings, stronger and more earina-like on peraeon segments 1—3 
than on any others; the various elevations feebly developed on pleon segments 
4—6. Head, rostrum long, acute, slightly deflexed, with carina-like compression 
below; upper surface of head separated from the cheeks by weak ridge-like 
elevations, and grooved with a furrow continued along the rostrum. Side- 
plates 1—4 very deep and obliquely outward and downward directed, owing 
to the breadth and flatness of the body. Eyes moderately large, prominent, 
biseuit-shaped, black. Antenna 1 about ’/, as long as body, and about /, longer 
than antenna 2, peduncle stouter and usually longer than peduncle of antenna 2, 
34 joint longer than 24, in d flagellum with 12 joints, accessory flagellum 
with 2; antenna 2, flagellum with 4 joints; but in (much longer) Q antenna 1, 
flagellum with 20—29, accessory flagellum with 4 or 5, antenna 2, flagellum 
with 7 or 8 joints. Gmathopods 1 and 2, 5th joint short, 6! joint broad, 
oblong, that of gnathopod 1 somewhat larger than that of gnathopod 2 (in figure 
equal in size), the length little greater than the breadth, which enereases to 
the palm, this being oblique, well defined, subequal to the hind margin. 
Peraeopods 3—5, 24 joint not broad, hind margin feebly convex, with few 
but rather long setae. Uropods 1 and 2 reaching end of uropod 3 or 
rather beyond. Uropod 3 '/,, as long as body, inner ramus about °/, as long 
as outer, with simple setae, outer with a few plumose setae on inner margin. 
Telson eleft almost to centre (in figure less than "/, of length). Colour 
brown or yellow. L. 9 11, 0 24—31 mm. 


Lake Baikal. Depth 50—300 m. 


15. Gen. Brachyuropus Stebb. 
1899 Brachyuropus, T. Stebbing in: Tr. Linn. Soe. London, ser. 2 v.7 p. 424. 
With median dentate carina. Side-plate 4 with projecting tooth. 
Antenna 1 much the longer, accessory flagellum long. Gnathopods 1 and 2 
similar, subchelate. Peraeopods 3—5 elongate. Uropods 1 and 2 elongate. 
Uropod 3 rudimentary, rami very unequal. Telson apically emarginate. 
2 species. 


Synopsis of species: 


Projeeting tooth of side-plate 4 compressed, direeted 

obliquely dowawarl ...... u sr oem 1. B.grewingkü . p.393 
Projecting tooth ofside-plate 4rounded, direeted horizontally 

OBERE. 570 nn N EEE, 2. B. reichertii . . p.398 


nee 


urrz 


Den 


a a 


E 
2 
12 
4 
E 
Pi 
43 
3 
% 
J 


R 
4 


Brachyuropus 393 


1. B. grewingkii (Dyb.) 1874 Gammarus g., B. Dybowsky in: Horae Soe. 
ent. Ross., v.10 suppl. p. 150 t.2 f.4 | 1893 Orangony«&? g., A. Della Valle in: F. Fl. Neapel, 
v.20 p.928 | 1899 Brachyuropus g., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.424. 

Median dorsal carina represented on all segments, except pleon seg- 
ments 4—6 or 5 and 6, by strong teeth, usually strongest on peraeon seg- 
ments 5—7 and pleon segments 1 and 2, all, and especially those on pleon 
segments 1—3, laterally strongly compressed, hinder pleon segments dorsally 
rounded and completely smooth. Lateral marginal carinae on peraeon seg- 
ments weak, tubereular (a variety with double series of small tubereles on 
peraeon segments 6 and 7 and pleon segments 1—3). Head, surface rough, 
rostrum short, obtusely pointed; behind the eye from the cheek projects a 
long, pointed, obliquely outward and forward direeted tooth. Side-plates 1—4 
more or less deeply emarginate below between 2 acute points, the hinder 
longest. Side-plate 4 on lower part of its surface provided with a down- 
ward and backward direeted, strong, pointed, flattened tooth, reaching far 
over its hind angle. Pleon segments 1—3, postero-lateral angles acute (in 
figure rounded). Eyes weakly developed, white, dimly showing through the 
pellueid integument, sometimes not discernible at all. Antenna 1 more than half 
aslong asbody, about thriceas long as antenna 2, flagellum with more than 60 joints, 
accessory flagellum 22-jointed. Antenna 2, ultimate joint of peduncle shorter 
than penultimate, flagellum 14-jointed. Gnathopods 1 and 2, 5t% joint short, 
6! piriform, narrowing to the finger hinge, palm very oblique, much longer 
than hind margin, defined by a spine, and having a prominent spine near the 
middle (in figure); this joint (in figure) is longer in gnathopod 1 than in 
gnathopod 2. Peraeopods 3—5, 29 joint narrowly heart-shaped (in figure; 
narrowly oblong, a little widenel proximally), without setae on hind margin. 
Peraeopod 4 as long as body. Peraeopod 5 subequal to peraeopod 4 (in figure). 
Uropods 1 and 2 strongly developed, reaching about equally far, rami thickly 
fringed with simple setae. Uropod 3 searcely /,;,—"s, a8 long as body, 
outer ramus fringed with simple setae, 3—5 times as long as inner, which 
has only an apical seta. Telson broader than long, with convex margins 
narrowing to a shallowly emarginate apex, with angles only subaeute. Colour 
dark horn-yellow to yellowish white. L. reaching 66 mm. 
| Lake Baikal. Depth 100—1000 m. 


2. B. reichertii (Dyb.) 1874 Gammarus r., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p. 42, 152 t.13 f.4 | 1893 Orangonyx reicherti, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 930 | 1899 Brachyuropus reicherti, T. Stebbing in: Tr. Linn. Soe. 
London, ser.2 v.7 p. 424. 

Median dorsal carina as in B. grewingkii, but the teeth higher, more 
acute, less compressed, longest on pleon segments 1 and 2; peraeon segments 
1—4 with single weak lateral carina, segments 5—7 with lateral row of 
little roundish tubercles, and marginal prominences carina-like, tubereulate 
in the middle ; pleon segments 1—3 with lateral tubereles on hind margin. 
Head, surface rough, rostrum a short, blunt hump; from the cheek projects 
forward, outward, and upward a slightly bent tooth. Side-plates 1---4 below 
shallowly emarginate, the angles blunt and short. From the surface of side- 
plate 4, and nearly at right angles to it, a very long, rounded tooth is directed 
horizontally outward. Distance between apices of this pair of teeth equal to 
21/,—3 times greatest breadth of body without the teeth. Pleon segments 1—3, 
postero-lateral angles rounded. Eyes as in B. grewingkii. Antenna 1°), 
as long as body, 3—4 times as long as antenna 2, flagellum 46-jointed, 
accessory flagellum 12-jointed. Antenna 2, ultimate joint of peduncle shorter 


394 Brachyuropus, Macroheetopus 


than penultimate, flagellum 8-jointed. Gmathopod 1 as in B. grewingki; 
gnathopod 2 smaller, narrowing less, palm (in figure) shorter than hind margin. 
Peraeopod 3 not much shorter than the body. Uropods I and 2, rami scantily 
fringed with setae. Uropod 3 less than "/,, as long as body, outer ramus 
2—3 times as long as inner, both having only apical setae. Telson two- 
pointed, i. e. with acute angles to the emarginate apex. Colour whitish or 
yellow. L. 32 mm. 
Lake Baikal. Depth 200—500 m. 


16. Gen. Macrohectopus Stebb.*) 


1874 Constantia (non A. Adams 1860, Mollusca!), Costantia (laps.), B. Dybowsky 
in: Horae Soe. ent. Ross., v.10 suppl. p. 50, 51, 186 | 1888 Costantia, T. Stebbing in: 
Rep. Voy. Challenger, v.29 p. 427, 428. 

Peraeon smooth, pleon carinate. Head not rostrate. Side-plates all very 
small and shallow, apparently the 24 deepest, the 6! widest. Antenna 1 longer 
and stronger than antenna 2, peduncle very long, 39 joint longest, accessory 
flagellum wanting. Mouth-parts (so far as known) as in Gammarus (p. 460). 
Gnathopods 1 and 2 slender, feebly subchelate, 5t" joint longer than 6t%, 
Peraeopods 1—5 very slender, peraeopod 4 much the longest, 24 joint 
little expanded. Uropod 1 much the longest. Uropods 1 and 2, outer ramus 
much shorter than inner. Uropod 3, rami long, lanceolate, equal, 1-jointed, 
fringed with plumose setae. Telson long, divided. 

1 species. 


1. M. branickii (Dyb.) 1874 Constantia b. + ©. b. var. alexandri, B. Dybowsky 
in: Horae Soe. ent. Ross., v. 10 suppl. p. 186 t.5 f.7; p.187 t.3 f.6 | 1888 Cosiantia b., 
T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1696 | 1893 Pontogeneia (part.)?, A. Della 
Valle in: F. Fl. Neapel, v.20 p. 891. 

Body slender. Pleon segment 1 with weak median carina running out 
to a long, horn-like, upward projecting and slightly forward bent tooth (in 
vor, alexandri directed straight backward). Pleon segments 2 and 3 with 
median carina much stronger, but tooth directed straight backward and 
insignificant. Head, front somewhat depressed. Side-plates so small and 
shallow that the branchial vesieles and marsupial plates in a lateral view 
are exposed. Pleon segments 1—3, postero-lateral corners (in figure) rounded. 
Eyes rather large, narrowly reniform, black. Antenna 1 about ?/, as long as 
body, flagellum shorter than peduncle, witi 23—56 joints. Antenna 2 very 
slender, ultimate and penultimate joints of pedunele long, subequal, flagellum 
with 12—22 joints, setiferous as in antenna 1. Gmathopods 1 and 2 subequal, 
5th joint almost twice as long as 6! (in figure subequal to it), 6! joint 
narrowly oval, palm feebly defined. Peraeopod 1 rather longer than peraeo- 
pod 2. Peraeopods 3—5, 24 joint short, narrow, not setiferous on hind margin. 
Peraeopod 4, 4 times as long as peraeopod 3, and twice as long as peraeopod 5. 
Uropod 1 reaching beyond uropod 3, pedunele long, but inner ramus longer, 
5 times as long as the outer (in figure of var. alexandri shorter than peduncle 
and not much over twice as long as the outer ramus). Uropod 2, inner 
ramus about twice as long as outer, with plumose setae ‘on inner margin. 
Colour pellueid. L. © 36 mm. 

Lake Baikal (only met with swimming). 


*) Nom. nov. Maxpös, long, exrtog, sixth, molg, foot. — The name Constantia is 
preoceupied (1860, A. Adams in: Ann. nat. Hist., ser.3 v.5 p.300). The name Costantia 
is an accidental misspelling. 


a Er 
re SEHEN An 2 


rn a F EEE a 
a ae a a 
Lie u Eh ja Te ee er ie: } 


Cardiophilus, Brandtia 395 


17. Gen. Cardiophilus 0. Sars 


1896 Cardiophilus (Sp. un.: C. baeri), G. O. Sars in: Bull. Ac. St.-Petersb., ser.5 
v.4 p.474 | 1899 Caridophilus, J. V. Carus in: Zool. Anz., Regist. 16-20 p.89. 


Body elongate, smooth. Side-plates 1-4 rather broad. Antenna 1, 
accessory flagellum very small. Antenna 2 exceedingly small. Upper lip 
small, rounded. Lower lip without inner lobes. Mandible, eutting plates 
narrow, spine-row of 3 spines, molar not very powerful, palp large. Maxilla 1, 
inner plate with 3 plumose setae, outer with dentieulate spines, number not 
stated, palp weak, of 2 subequal slender joints, the 24 tipped with 2 setules. 
Maxilla 2 normal, inner plate with setae only on distal half of inner margin. 
‘ Maxillipeds normal, except that the finger is rudimentary, tipped with 2 
minute setules. Gnathopods 1 and 2 unequal, subchelate, 5th and 6th joints 
short in gnathopod 1, narrowly elongate in gnathopod 2. Peraeopods 1 
and 2, 4*h joint expanded, but not large. Peraeopods 3—5, 24 joint moderately 
. expanded. Peraeopods 1——-5, finger strong, hooked. Uropod 3 very small, 
outer ramus with minute 24 joint, inner scale-like. Telson very short, cleft 
to. the base. 


1 species. 


1. C. baeri O. Sars 1896 (©. b., @. ©. Sars in: Bull. Ae. St.-Pötersb., ser.5 v4 
p- 474 t. 11 £. 13—27. 


Body extremely slender and elongate, nearly eylindrie, pleon segments 
4—6 not long, perfeetly smooth. Head not rostrate, lateral lobes rounded, 
post-antennal corners subacute. Side plate 1 subquadrate, 4" little emarginate. 
Pleon segment 3, postero-lateral corners quadrate, but not very sharply. Eyes 
subrotund, dark. Antenna 1 about !/, as long as body, pedunele short, 1° joint 
longer than 2° and 34 combined, flagellum 10-jointed, accessory flagellum 
extremely small, with 2 joints, 24 minute. Antenna 2 scarcely half as long, 
ultimate joint of pedunele rather shorter than penultimate, flagellum 4-jointed. 
Gnathopod 1, 5tk joint subequal to 6%, 6th oval quadrangular, slightly narrowed 
distally, palm nearly transverse. Gnathopod 2 much longer, 5! joint fully 
as long as 6!" and distally wider, 6!" narrow, palm very short, transverse. 
Peraeopods 3—5, 24 joint oblong oval, slightly narrowed below, little differing 
in peraeopod 5 from that in peraeopod 4. Uropods 1 and 2 rather stout, 
rami subequal, having at the apex several spines, some of them hooked. 
Uropod 3 searcely at all projeetingy beyond uropod 1, outer ramus scarcely 
longer than peduncle, furnished with a few setules, inner ramus with 1 apical 
seta. Telson twice as broad as long, almost semieircular, each lobe with 
a small apical and 2 lateral hairs. L. © 5'5 mm. 

Caspian Sea. 


pr 


18. Gen. Brandtia Bate 
1862 Brandtia (Sp. un.: B.latissima), Bate, Cat. Amphip. Brit. Mus., p. 129. 


A median tubercular carina on at least some of the segments of 
peraeon and pleon; marginal carinae more or less developed. Antenna 1 
longer, but seldom much longer and in J sometimes shorter than antenna 2, 
accessory flagellym 1-jointed. Mouth-parts nearly as in Gammarus (p. 460), at 
least in B. lata. Upper lip rounded. Lower lip without inner lobes. Maxilla 1, 
inner plate with numerous setae, outer with 11 spines. Peraeopod 5, 24 joint 
moderately expanded. Uropod 3 short. Telson deeply cleft. 


6 species. 


396 Brandtia 
Synopsis of species: 


Median carina on all segments of peraeon —- 2. 
1 | Median carina only on last 2 or 3 segments of 


peraeon — 3. 
2 j Median carina of pleon segment 1 carrying 2 spines 1. B.lata. .... p- 396 
\ Median carina of pleon segment 1 devoid of spines 2. B. latissima . . p.396 
3 j Uropod 1 reaching beyond uropod 3 — 4. 


\ Uropod 1 not reaching beyond uropod 3 —- 5. 


| Uropod 3, outer ramus twice as long as inner . . 3. B. tuberculata . p. 397 


® | Uropod 3, outer ramus not twice as long as inner 4. B. morawitzii . p. 397 


f Uropod3, inner ramus more than half as long as outer 5. B. smaragdina . p. 398 


\ Uropod 3, inner ramus less than half as long as outer 6. B. fasciata . . . p.398 


1. B.lata (Dyb.) 1874 Gammarus latus, B. Dybowsky in: Horae Soe. ent. Ross., 
v.10 suppl. p.159 t.4 f.5 | 1893 Atylus? l., A. Della Valle in: F. Fl. Neapel, 0.20 p. 929 
1899 Brandtia lata, T. Stebbing in: Tr. Linn. Soe. London, ser. 2 ©.7 p. 424. 


Back of peraeon flatly roof-shaped, median carina throughout, tuber- 
ceular, on segment 1 carrying 1 or 2 backward bent spines; marginal carinae 
strongly developed, obtusely projecting immediately over the side-plates; 
on pleon segments 1—3 the median tubercular carina carries on segment 1 
in d 2, in © 4 spines, on segments 2 and 3 of both sexes 4 forward 
direeted spines; corresponding to the marginal carinae of peraeon are small, 
slightly. curved elevations; pleon segments 4—6 arched, without carinae. 
Head, front with tip-tilted rostrum, carrying 2 backward pointing spines, 
top of head surmounted by 4 humps each carrying a backward directed 
spine; an acute spine projecting from lower margin of each cheek. Side- 
plates 1—4 setiferous, 1—3 carinate. Lateral compression of body greatest 
at lower part of side-plates. Eyes prominent, oval or reniform, black. 
Antenna 1 not long, in J little, in Q eonsiderably, longer than antenna 2, 
1° joint with hump near distal end above, flagellum 17—19 - jointed. 
Antenna 2, flagellum 7—9-jointed. Gnathopods 1 and 2 subequal, 
6th joint oblong, but in gnathopod 1 with more oblique palm, which is 
armed with 1 large and 2 small spines. Peraeopods 3—5, 24 joint heart- 
shaped, with 11—15 rather long setae on hind margin. Uropod 3 smaller 
in Q than in d, rami nearly equal, ending in simple setae longer than the 
rami, with delicate plumose setae on the inner margin. Telson broader than 
long, cleft nearly to the base, with small setules on the rounded apices. 
Colour brownish yellow to brownish green, sometimes with a bright mark 
across end of peraeon. L. 17—20 mm. 


Lake Baikal. Depth 2—-20 m. 


2. B. latissima (Gerstf.) 1858 Gammarus latissimus, Gerstfeldt in: Mem, pres. 
Ac. St.-Pötersb., v.8 p.288 | 1862 Brandtia latissima, Bate, Cat. Amphip. Brit. Mus., 
p. 129 1.23 f£.5,6 | 1893 Pontogeneia? l., A. Della Valle in: F. Fl. Neapel, v.20 p.616, 929 
1874 Gammarus latissimus + @.latior, B. Dybowsky in: Horae Soe. ent. Ross., v. 10 
suppl. p. 161; p. 158 t.4 f. 6. 


General shape as in B. lata, median carina strongly developod, on pleon 
segments 2 and 3 carrying 3-—-4 pairs of spines, but none on segment 1; 
on pleon segment 3 the spines of the last pair almost on the hind margin and almost 
twice as far asunder as those of the other pairs, the same being the case 
on segment 2 only when the 4b pair of spines is developed. Marginal 
carina on each of peraeon segments carrying a short spine, this carina 


ein and un El 172, 32 10T SE 9" 22.20 on 


BE Ei. 


3 Br ra nn tn ln nl a 


Bd 


Brandtia 397 


represented by lateral swellings on pleon segments 1—3; pleon segments 4—6 
much longer than in B. lata. Head with spines as in B. lata and 2 additional 
lateral pairs. Side-plates 1—4 all carinate, but not setiferous. Eyes prominent, 
oval or reniform, black. Antennae 1 and 2 in general as in B. lata, but 
1° joint of antenna 1 with 2 humps in line, the front one armed with 
2 backward direeted spines, flagellum with 15—27 joints, of which in the S the 
3%, in the © the 4" is longest. Gmathopods 1 and 2 subequal, 6% joint slender, 
with slightly convex margins (Dybowsky), in gnathopod 1 6%% joint more elongate, 
in gnathopod 2 more rhomboidal, with palm more obliquely truncate (Gerstfeldt). 
Peraeopods 3—5, 2 joint heart-shaped, narrower than in B. lata, with extremely 
short, distant, setae on hind margin. Uropod 3 shorter in Q than in C, 
but never rudimentary. Colour in general greenish brown, parts of head 
and peraeon brighter. L. 19—27 mm. 


Lake Baikal, River Angara. 


3. B. tuberculata (Dyb.) 1874 Gammarus tuberculatus, B. Dybowsky in: Horae 
Soe. ent. Ross., v.10 suppl. p. 161 | 1893 Atylus? t., A. Della Valle in: F. Fl. Neapel, 
v.20 p.981 | 1899 Brandtia tuberculata, T. Stebbing in: Tr. Linn. Soc. London, ser. 2 
v.7 p.424. 


The median carina weakly developed as longish tubereles on peraeon 
segments 6 and 7 and pleon segments 1—3; marginal carina represented by a 
rounded, smooth, not very prominent swelling immediately over the side-plates 
of all peraeon segments and pleon segments 1—3.” Head, rostrum a short 


- obtuse point. Side-plates I—4 yetiferous. Eyes round oval, broader below 


than above, black. Antenna 1 less than '/, as long as body, twice as long 
as antenna 2, 1° joint broad, flagellum 24-jointed. Antenna 2, flagellum 
zus Gnathopods 1 and 2 subequal, 6% joint piriform, palm defined 
by 3 spines, finger long, slightly bent. Peraeopods 3 and 4, 24 joint expanded 
above, all the hind margin beset with rather long setae. Peraeopod 3, 
24 joint greatly widened below. Uropods 1 and 2 reach beyond uropod 3, 
which is very short, outer ramus twice as long as inner, with 3—7 spines 
on apex and 2 on outer margin, inner ramus with only 2 spines, both 
apical. Telson divided. Colour greyish white or elear brown, with narrow 
dark stripes across the segments. L. 16 mm. 


Lake Baikal. Litoral. 


4. B. morawitzii (Dyb.) 1874 Gammarus .m., B. Dybowsky in: Horae Soe. 
ent. Ross., v.10 suppl. p. 163 | 1893 Atylus? m., A. Della Valle in: F. Fl. Neapel, v.20 
p: 929 | 1899 Brandtia m., T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p. 424. 


Median carina distinet on the convex peraeon segments 6 and 7 and 
pleon segments 1—3; spines on pleon segments 5 and 6 extremely delicate; 
whether marginal carinae are present or absent is not stated. Head, rostrum 
broad, rounded, little advanced. Side-plates 1—4 setiferous. Eyes moderately 
large, roundish, convex, black or dark red. Antenna 1 rather more than !/, 
as long as body, and about '/, longer than antenna 2, 1° joint stout, flagellum 
14—18-jointed. Antenna 2, flagellum with 7 or 8 joints. Gmathopods 1 
and 2 small, slender, 6% joint oval in gnathopod 1, oblong in gnathopod 2. 
Peraeopod 3, 24 joint on upper margin strongly rounded. Peraeopod 4, 
24 joint heart-shaped. Peraeopod 5, 24 joint broader than in peraeopods 3 and 4, 
hind margin evenly rounded. Uropod 3 extremely short, outer ramus scarcely 
longer than peduncle, 1-jointed, with 4 spines on apex, 2 on outer margin; inner 
ramus °/, as long as outer, with 1—3 apical spines. Each half of telson 


398 Brandtia, Mieruropus 


like a cone with broad base. Colour greyish white, sometimes dark longitudinal 
stripe on the back. L. 10 mm. 
Lake Baikal. Depth 20 m. 


5. B.smaragdina (Dyb.) 1874 Gammarus smaragdinus + @. s. var. intermedius. 
B. Dybowsky in: Horae Soc. ent. Ross., ©. 10 suppl. p. 164 t. 11 f.6 | 1895 Atylus? s., 
A. Della Valle in: F. Fl. Neapel, v.20 p. 930 | 1899 Brandtia smaragdina, T. Stebbing 
in: Tr. Linn. Soc. London, ser.2 v.7 p. 424. 


Shows some affınity to Cardiophilus (p. 395). Sexual variation very marked. 
Body stouter in 9 than in d. Median carina on peraeon segments 6 and 7 and 
pleon segments 1—3 consisting of long tubereles of little prominence; pleon 
segments 4—6 carrying 2 or 3 little groups of very delicate spines; marginal 
carinae not mentioned. Head, rostrum rounded, depressed. Side-plates 1—4 
with marginal setae. Eyes convex, reniform, black. Antenna 1 in C as long 
- as body, 4 times as long as antenna 2, in Q half as long as body, twice 
as long as antenna 2, 1 joint stout, flagellum in © with 44, in Q with 
34 joints. Antenna 2, flagellum 8-jointed. Gmnathopods 1 and 2, 6 joint 
oval, in S that of gnathopod 1 somewhat the larger. Peraeopods 3—5, 
24 joint moderately broad, most expanded in peraeopod 5, with hind margin 
and surface setiferous and margin also spinose. Uropod 3 short, longer in 
S than in 9, outer ramus Y,—"/; longer than inner, in S with plumose 
setae on inner margin, on outer and apex with spines and simple setae; in 
Q with 2 spines on outer margin, on inner with 2 or 3 setae, at apex with 
spines and setae, inner ramus carrying only setae. Telson divided. Colour 
emerald-green (var. intermedius whitish; it has in © smaller eyes, shorter 
antennae, and shows some minute differences in the uropod 3). L. 11—12 mm. 

Lake Baikal. Depth 50—100 m (var. intermedius at 15 m). 


6. B. fasceiata Stebb. 1874 Gammarus zebra (non Rathke 1843!), B. Dybowsky 
in: Horae Soe. ent. Ross., v.10 suppl. p. 166 t.14 f.7 | 1893 Atylus? z., A. Della Valle 
in: F. Fl. Neapel, v.20 p. 931 | 1899 Brandtia faseiata, T. Stebbing in: Tr. Linn. Soe. 
London, ser.2 v.7 p. 424. 


Peraeon segments 5—7 or 6 and 7 and pleon segments 1—3 carinate 
or provided with little tubereles in the median dorsal line; pleon segments 4—6 
very convex, with very delicate spine-points or setae. Head, rostrum short, 
slightly depressed. Side-plates 1—4 scantily setiferous. Eyes reniform, black. 
Antenna 1 very little longer than antenna 2, '/,—'/, as long as body, 1° joint 
rather broad, slightly flattened, flagellum 10—13-jointed. Antenna 2, flagellum 
5—7-jointed. Gmathopods 1 and 2 subequal, 6'"% joint oblong, palm shorter 
and less oblique in gnathopod 2. Peraeopod 5, 24 joint trapezoidal, with the 
corners rounded, broadest below, much broader and longer than the corresponding 
joint of peraeopods 3 and 4. Uropod 3 short, outer ramus with small 24 joint, 
in length about 4 times as long as the inner ramus, with 4 spines and several 
setae on outer margin, simple setae on the inner, spines and setae at the 
apex, the inner ramus with 1 long apical seta. Telson divided. Colour greenish 
brown, with dark brown or black stripe across -each segment. L. 17 mm. 

Lake Baikal. At river mouths, ascending the streams in swarms. 


19. Gen. Micruropus Stebb. 
1899 Micruropus, T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p. 424. 


Without carinae or overarching segments. Antennae 1 and 2 short; 
antenna 1 usually longer than antenna 2, the peduneles not greatly differing 


nn I ha a a 


De eh A 


N IR SER EETRTERRNE EN A06-277 0 ee 


Da ATI DE Ba ET a 


Micruropus 399 


in length, accessory flagellum 1-jointed. Gnathopods 1 and 2, 6! joint 
not greatly differing in size. Uropod 3 small or very small, rami unequal, 


outer ramus usually 1-jointed. Telson cleft. 
12 species. 
Synopsis of species: 


1 All segments dorsally unarmed — 2. 
Some segments with dorsal setules or spinules — 3. 


Eyes rather large; uropod 1 not reaching beyond 


2 | a NR 1. M. puella . . . p.399 
Eyes very small; uropod 1 reaching beyond uropod3 2. M.inflatus . . p.399 
All segments anterior to pleon segment 4 dorsally 
4 smooth —- 4. 
Some segments anterior to pleon segment 4 dorsally 
armed — 5. 
j Uropod 1 not reaching beyond middle of uropod 3 3. M. vortex. . - p.400 
“ 1 Uropod 1 reaching end of uropod 3... .. .. "4. M. talitroides . p. 400 


& ntenna l, peduncle shorter than In antenna 2 — 6. 
A 1, pedunele shorter than i te 2—6 
* \ Antenna 1, pedunele not shorter than in antenna 2 — 7. 
’ pP 


| Antenna 1 shorter than antenna 2; uropod 3, inner 


| ramus half as long as outer... ......- 5. M. littoralis . . p.401 
Antenna 1 longer than antenna 2; uropod 3, inner 
ramus scarcely !/; as long as outer. . . . -. . 6. M.glaber.. . . p.401 
f Peraeon dorsally minutely granular ....... 7. M. rugosus . . p.402 
\ Peraeon dorsally smooth — 8. 
8 Antennaeland2, ingand 2, flagellum with caleeoli 8. M. wahlii . . . p.402 
Antennae 1 and 2, flagellum without calceoli — 9. 


'g j Antenna 1 longer than antenna 2 — 10. 
\ Antenna 1 not longer than antenna 2 — 11. 


10. j Uropod 3, inner ramus nearly as long as outer... 9. M. fixsenii . . p.402 
\ Uropod 3, inner ramus only half as long as outer 10. M. perla . „ . p.408 
u j Gnathopod 2, 6th joint piriform. . ...... - 11. M.klukü . . . p.408 
\ Gnathopod 2, 6th joint oblong . ... ..... 12. M. pachytus. . p.404 


1. M. puella (Dyb.) 1874 Gammarus p., B. Dybowsky in: Horae Soe. ent. Ross.. 
v.10 suppl. p. 48, 175 | 1893 Atylus? p., A. Della Valle in: F. Fl. Neapel, v. 20 p. 930 | 1899 
Mieruropus p., T.. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 424. 


All segments dorsally completely smooth and level. Side-plates 1—4 
each with 3—5 setules. Eyes rather large, reniform, ruby-red. Antenna 1 °/, 
as long as body, more than twice as long as antenna 2, peduncle a little longer 
than pedunele of antenna 2, flagellum 12—14-jointed. Antenna 2, flagellum 
with 3 or 4 joints. Gmnathopod 1, 6" joint piriform, in 9 larger than the 
oblong 6t" joint of gnathopod 2. Peraeopods 3—5, 2° joint broad, rather 
convex in front, strongly widened behind, the almost semieireular wing 
ending below in a short rounded lobe, setules on both margins. Uropod 1 
reaching end of uropod 3. Uropod 3 '/,, or "/s as long as body, outer 
ramus 2-jointed, 24 joimt '/, as long as 1°, with 2 apical setae, 1° joint 
with 1 marginal spine and 2 apical spines; inner ramus */, as long as outer, 
with 2 apical setae. Telson celeft. Colour white. L. 5—6 mm. 


Lake Baikal. Depth 100 m. 
-2. M. inflatus (Dyb.) 1874 Gammarus i., B. Dybowsky in: Horae Soe. ent. 


Ross., v.10 suppl: p.169 t.12 f.4 | 1893 Atylus?i., A. Della Valle in: F. Fl. Neapel, 
v.20 p.929 | 1899 Micruropus i., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.424. 


400 Miecruropus 


All segments dorsally smooth. Side-plates 1—4 with setae. Eyes very 
small, punetiform, black. Antenna 1 half as long as body, twice as long as 
antenna 2, longer than in other species of this genus, flagellum more than 
twice as long as peduncle, 23-jointed. Antenna 2, ultimate joint of peduncle 
shorter than penultimate, flagellum 9-jointed. Gnathopods 1 and 2, 6th joint 
piriform, little larger in gnathopod 1 than in gnathopod 2, palm very long 
and oblique, finger long, curved. Peraeopods 3—5, 24 joint with numerous 
fascicles of setae at the strongly convex lower front corner, upper hinder 
part in peraeopods 3 and 4 with broad winglike expansion, hind margin with 
long setae; peraeopod 5 very broad, evenly expanded behind, setose on both 
margins. Uropods 1 and 2 reaching much beyond uropod 3. Uropod 3 very 
short, scarcely '/,, as long as body, outer ramus about twice as long as 
inner, with 3 apical and 2 pairs of marginal spines, inner with 2 marginal 
spines and 1 or 2 apical setae. Telson broader than long, cleft to base, 
lobes conical, divergent. L. about 20 mm. 


Lake Baikal. Depth 2—10 m. 


"3. M. vortex (Dyb.) 1874 Gammarus v., B. Dybowsky in: Horae Soc. ent. Ross., 
v.10 suppl. p.178 t.9 f.4 | 1899 Miceruropus v., T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 v.7 p.424 | 1898 Gammarus pungens (part.)?, A. Della Valle in: F. Fl. Neapel, 
v.20 p. 931. 


Pleon segments 4—-6 with 3 groups of delicate dorsal spines and setae, 
the number of setae small and variable; other segments smooth. Side-plates 
1—4 with isolated setae. Eyes of moderate size, reniform, black. Antenna 1 
about '/, as long as body, a little longer than antenna 2, pedunele a little 
shorter than pedunele of antenna 2, but in Q sometimes longer, flagellum 
9—-16-jointed. Antenna 2, flagellum with 5—9 joints, calceoliferous only in 
the d. Gmathopod 1, 6!" joint piriform, as long as the oblong 6! joint of 
gnathopod 2, but (in figure) less bulky. Peraeopods 1 and 2, finger with 
a strong spine on inner margin adjacent to the nail. Peraeopod 3, 24 joint 
slightly convex in front, the wing-like expansion produced somewhat down- 
ward in a lobe-like rounded corner. Peraeopods 4 and 5, 24 joint heart- 
shaped, wide above, narrowed below, differing from the form usual in this 
group, hind margin fringed with long setae. Uropods 1 and 2 scarcely 
reaching middle of uropod 3. Uropod 3 about !/, as long as body, therefore 
rather distinet from rest of genus, outer ramus 2-jointed, inner only '/, or 
!/, as long, both with plumose setae on inner margin. Telson cleft. Colour 
greenish. 1. 0 10, 9 6—7 mm. 


Lake Baikal. Depth 5—80 m; on stony coasts. 


4. M. talitroides (Dyb.) 1874 Gammarus t., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.47,171 t.14 f.3 | 1893 Atylus? t., A. Della Valle in: F. Fl. Neapel, 
v.20 p.930 | 1899 Mieruropus t., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.424. 


Pleon segments 5 and 6 with short, delicate, dorsal spinules, other 
segments smooth. Head, rostrum somewhat prominent, curved, bluntly 
rounded. Side-plates 1-——4 with setae. Eyes not large, reniform, brownish 
black. Antenna 1 about '/, as long as body, about '/, longer than antenna 2, 
but with rather shorter peduncle in C, flagellum 14—18-jointed. Antenna 2, 
flagellum with 7 joints, ealceoliferous only in d. Gnathopod 1, 6% joint rather 
shorter and deceidedly narrower than the oblong 6'% joint of gnathopod 2, 
described as piriform, but in figure the palm is shorter than hind margin, 
and, though very oblique, well defined. Peraeopods 3 and 4, 24 joint with 
convex, strongly setose, lower front corner, hinder expansion setose, rounded 


Mieruropus 401 


above, narrowed below. Peraeopod 5, 24 joint setose as in preceding peraeo- 
pods, but longer and somewhat broader, hinder expansion narrower than 
musele-bearing part. Uropod 1 reaching end of uropod 3. Uropod 3 "3 — "is 
as long as body, outer ramus 1l-jointed, /,—?/, longer than inner, with 
' 2 pairs of strong spines on outer margin, both rami having long apical setae. 
Telson cleft to base, each half (in figure) with 3 apical spinules. Colour 
yellowish or greenish grey; front margin of head and side-plates 1—3, side- 
plate 4, 24 joint of peraeopods 3—5, uropod 3 and telson, brownish black. 
L. 11 mm. 

rös Baikal. 

. M. littoralis (Dyb.) 1874 Gammarus l., B. Dybowsky in: Horae Soe. ent. 

Ross., v, sis suppl. p. 168 t.14 f.2 | 1893 Atylus? I., A. Della Valle in: F. Fl. Neapel, 
v.20 p.929 | 1899 Micruropus l., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.424. 

Peraeon segments 6 and 7 and pleon segments 1—3 with dorsal setae, 
pleon segments 4+—6 with groups of delicate spines arranged on upper curvature 
of the segments. Head, rostrum obtusely pointed. Side-plates 1—4 with few 
marginal setae. Eyes small, rounded reniform, wide apart, black, Antenna 1 
(usually) shorter and with shorter pedunele than antenna 2, scarcely '/, as 
long as body, 1° joint stout, longer than 24 and 34 combined, flagellum 
8-jointed, accessory flagellum 1-jointed. Antenna 2, ultimate and penultimate 
joints of pedunele subequal, flagellum 5--7-jointed. Gmathopod 1, 6!" joint 
piriform, longer but narrower than the oblong 6 joint of gnathopod 2, 
palm concave, very oblique. Peraeopods 3 and 4 with lower front corner of 
94 joint strongly convex and setose; peraeopod 5 as in M. inflatus (p. 399). 
Uropod 1 (not uropod 2) reaching end of uropod 3. Uropod 3 scarcely 
!/,» as long as body, outer ramus about twiee as long as inner, with 4 or 
5 apical and 2 marginal spines and as many setae, inner with only a long 
apical seta. Telson broader than long, not eleft to the base, lobes conically 
divergent, tipped with spinules. Colour white. L. about 10 mm. 
Lake Baikal. 


6. M. glaber (Dyb.) 1874 Gammarus g., B. Dybowsky in: Horae Soc. ent. Ross., 
v.10 suppl. p.176 t.14 f.6 | 1893 Atylus? g., A. Della Valle in: F. Fl. Neapel, v.20 
p. 928 | 1899 Micruropus g., T. Stebbing in: Tr. Lin. Soc. London, ser.2 v.7 p. 424. 

Peraeon segments 6 and 7 each with 2 long setae on hind margin, 
pleon segments 1-4 with long, isolated setae on the whole upper surface, 
segments 5 and 6 with groups of delicate spinules. Head, rostrum a slightly 
depressed, rounded point. Side-plates 1—4 with isolated setae. Eyes of 
moderate size, rounded reniform, black. Antenna 1 about '/, as long as 
body, about '/, longer than antenna 2, but with pedunele rather shorter, 
flagellum 11-jointed. Antenna 2, ultimate and penultimate joints of peduncle 
equal, flagellum 4-jointed. Gnathopod 1, 6% joint in JS larger than oblong 
6% joint of gnathopod 2, which it much resembles in shape, but that the 
much more oblique palm adds to its length, the part bounded by the hind 
margin being in both gnathopods oblong. Peraeopods 3—5, 24 joint with 
lower front cormer little or not at all inflated, but setose; in peraeopod 
5 this joint is trapezoidal, with numerous and long setae on hind margin. 
‚Uropods 1 and 2 reaching last fourth of outer ramus of uropod 3. Uropod 3 
about '/, as long as body, outer ramus with apical spines and setae, 1 spine 
on inner margin, 2 pairs of spines on outer, inner ramus scarcely '/, 
as long as outer, with 1 apical seta. Telson cleft to base, lobes conical, 
with some armature. Colour white. L. 9 mm. 

Lake Baikal. 


Das Tierreich. 21. Lief.: T.R. R. Stebbing, Amphipoda 1, 26 


402 Mieruropus 


7. M. rugosus (Dyb.) 1874 Gammarus r., B. Dybowsky in: Horae Soe. ent. 
Ross., ».10 suppl. p.48, 174 t.14 f.8 | 1893 Atylus? r., A. Della-Valle in: F. Fl. Neapel, 
v.20 p.930 | 1899 Micruropus r.. T. Stebbing in: Tr. Linn. Soe. London, ser.2 0.7 p.424. 


All peraeon segments and a narrow girdle on head dorsally minutely 
granular and here and there beset with short setules. Head with short, 
rounded, rostral point. Side-plates 1—4 setose on lower margin. Eyes small, 
wide apart, rounded reniform, black. Antenna 1 scarcely '/, as long as body, 
about '/, longer than antenna 2, peduncle stouter and a little longer than 
that of antenna 2, 1% joint exceedingly stout, longer than 24 and 34 combined, 
flagellum rather shorter than pedunele, 10-jointed; accessory flagellum 
1-jointed. Antenna 2, ultimate joint of peduncle shorter than penultimate, 
flagellum 8-jointed. Gnathopod 1, 6" joint rather longer and broader than 
that of gnathopod 2 (oval in gnathopod 1, oblong in gnathopod 2, but in 
figure very similar), the palm little oblique, well defined, much shorter than hind 
margin. Peraeopods 3—5, 24 joint at lower front corner fringed with fascicles 
of stiff setae; in peraeopods 3 and 4 the wing-like. widening behind chiefly 
on the upper half, in peraeopod 5 the greatest breadth at the lowest quarter. 
Uropods 1 and 2 reaching beyond uropod 3. Uropod 3 '/,, as long as body, 
outer ramus 1-jointed, as long as pedunele, with 3 apical spines and 2 in 
middle of outer margin, inner ramus about half as long, with 1 long apical 
seta. Telson (in figure) nearly twice as broad as long, celeft not nearly to 
the base, a seta on each divergent apex. Colour brownish white. L. 9 mm. 


Lake Baikal. 


8. M. wahlii (Dyb.) 1874 Gammarus w. + @. w. var. platycercus, B. Dybowsky 
in: Horae Soe. ent. Ross., v.10 suppl. p.179; p.180 | 1893 Atylus? w., A. Della Valle 
in: F. Fl. Neapel, v.20 p.931 | 1899 Micruropus w., T. Stebbing in: Tr. Linn. Soe. 
London, ser.2 v.7 p.424. 


Pleon segments 4—6 each with 3 groups of spinules, 2 or 3 in each 
group on segments 4 and 5, only 1 or 2 in each on segment 6. Side-plates 1—4 
with setae. Eyes moderately large, reniform, black. Antenna 1 less than '/, as 
long as body, usually rather shorter than antenna 2, in var. plaiycercus rather 
longer, peduncle stouter but shorter, 1% joint stout, flagellum with 21—27 joints 
(in var, with 43). Antenna 2, flagellum with 21—27 joints (in var. with 
31—43), as in antenna 1 furnished with calceoli (in antenna 2 smaller in 
oO than in 9). Gmathopods 1 and 2 with 6" joint of same size, piriform 
in gnathopod 1, oblong in gnathopod 2. Peraeopods 3 and 4, 24 joint little 
inflated at the setose lower front corner, hind margin closely set with long 
setae. Peraeopod 5, 24 joint broad, broadest in the upper half, with long setae 
on the hind margin. Uropod 3 '/,, as long as body, reaching beyond the 
others, outer ramus 4 times as long as the inner, with plumose setae on 
inner margin, 2 pairs of spines and simple setae on the outer, 24 joint 
short (not found in var.); inner ramus with 2 plumose setae on inner margin 
and a long apical seta. Telson divided. Colour greenish white. L. 11 mm. 


Lake Baikal (mouth of the river Sljudianka). 


9. M. fixsenii (Dyb.) 1874 Gammarus f., B. Dybowsky in: Horae Soe. ent. 
Ross., v. 10 suppl. p. 172 | 1893 Atylus? f., A. Della Valle in: F. Fl. Neapel, v.20 p.928 | 
1899 Micruropus f., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 424. 


Pleon segments 1—6 each with 2 delicate setae on hind margin, 
otherwise upper surface of body quite smooth and even. Head, upper profile 
strongly convex, rostrum depressed, beak-like. Side-plates 1--4 with setae. 


Mieruropus 403 


Eyes moderately large, broadly reniform, not prominent, black. Antenna 1 
about '/, as long as body, nearly twice as long as antenna 2, but peduncle, 
though stouter, scarcely longer, flagellum 16-jointed. Antenna 2, flagellum 
4- or 5-jointed. Gmnatbopods 1 and 2, 6® joint small, piriform in gnathopod 1, 
oblong in gnathopod 2. Peraeopods 3 and 4, 24 joint narrow, front margin 
little convex, with fascieles of long setae, hind margin setose, wing-like 
expansion very weakly developed. Peraeopod 5, 24 joint very broad, in C 
only */. longer than broad, lower part of front margin almost monstrously 
bulging, upper surface of the swelling elosely set with long setae. Uropods 1 
and 2 moderately long, in S both reaching beyond uropod 3, in Q uropod 2 
somewhat shorter. Uropod 3, outer ramus as long as peduncle, with 2 or 3 
apical spines and 4 pairs on outer margin, inner ramus only about '/, shorter, 
with 2 or 3 apical spines. Telson eleft: Colour white, with a longitudinal dorsal 
dark stripe. L. about 9 mm. 


Lake Baikal. 


10. M.perla (Dyb.) 1874 Gammarus p., B. Dybowsky in: Horae Soe. ent. Ross., 
v.10 suppl. p.184 | 1893 Atylus? p., A. Della Valle in: F. Fl. Neapel, v.20 p. 929 | 1899 
Micruropus p., T. Stebbing in: Tr. Linn. Soe. London, ser.2 v».7 p. 424. 


Peraeon segments smooth, pleon segments with scattered dorsal setules. 
Head, rostral point short, rounded, slightly depressed. Side-plates 1—4 
with few setae. Eyes punetiform or linear, white, becoming invisible in 
spirit. Antenna 1 about '/, as long as body and '/, longer than antenna 2, 
pedunele rather longer than pedunele of antenna 2, 1° joint broad, flagellum 
rather shorter than pedunele, 7- or 8-jointed, accessory flagellum 1-jointed. 
Antenna 2, flagellum 4- or 5-jointed. Gnathopod 1, 6!" joint oval, rather 
larger than the oblong 6!" joint of gnathopod 2. Peraeopods 3—5, lower front 
corner with fascieles of stiff setae; this joint in peraeopods 3 and 4 very 
narrow, above broader than below, hind margin sinuous, in peraeopod 5 very 
broad, wider below than above. Uropod 1 reaching rather beyond uropod 2, 
both beyond uropod 3. Uropod 3 about '/;,, as long as body, outer ramus 
shorter than peduncle or equal to it, with 2 or 3 apical spines, inner ramus 
half as long, sometimes with an apical seta. Telson cleft. Colour white. 


L. 9 9,9 7 mm. 


Lake Baikal. Depth 10 m. 


11. M. klukii (Dyb.) 1874 Gammarus k., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.181 | 1893 Atylus? k., A. Della Valle in: F. Fl. Neapel, v.20 p.929 | 
1899 Micruropus k.,.T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p.424. 


Pleon segments 4—6 with 2 or 3 groups of delieate spinules, back 
otherwise quite smooth. Side-plates 1—4 setiferous. Eyes narrowly reniform, 
black. Antenna 1 only '/, as long as body, rather shorter than antenna 2, 
15 joint broad, flat, 2% and 34 thin, flagellum with 10 joints, 1° rather 
long, and as long as 1-jointed accessory flagellum. Antenna 2, flagellum 
4- or 5-jointed. »Gnathopods 1 and 2 equal, 5®% joint piriform. Peraeopod 3, 
24 joint broader below than above, hind margin with upper and lower corners 
rounded. Peraeopod 4, 24 joint wider above than below. Peraeopod 5, 
24 joint wider below, hind margin evenly rounded, and as in peraeopods 3 
and 4 setose. Uropod 3 /,, as long as body, but reaching beyond uropods 1 


‚and 2, outer ramus 1-jointed, 4 or 5 times as long as inner, with 5 spines 


and 3 setae on the apex, a spine and ä.seta on outer margin, inner ramus 
26* 


404 Mieruropus, Neoniphargus 


with only 1 very long apical seta. Telson divided. Colour greyish white. 
L. about 10 mm. 
Lake Baikal. Close to the shore. 


12. M. pachytus (Dyb.) 1874 Gammarus p. + @.p. var. dilatatus, B. Dybowsky 
in: Horae Soc. ent. Ross., v.10 suppl, p.182; p. 183 |; 1898 Atylus? p., A. Della Valle 
in: F. Fl. Neapel, 0.20 p.929 | 1899 Micruropus p., T. Stebbing in: Tr. Linn. Soe. 
London, ser.2 v.7 p. 424. 


Segments smooth, except that the hind margin is thickened and overlaps 
front margin of following segment. In var. dilatatus the surface of the 
body covered with short hairs, and the setae of side-plates 1—4 long, 
stout, almost spine-like. Eyes small, rounded reniform, black. Antenna 1 
!, as long as body, subequal to antenna 2, 1° joint broad, flagellum 
11-jointed, with oblique attachment, so that it is always direeted outwards, 
accessory flagellum 1-jointed. Antenna 2, flagellum 8- or 9-jointed. Gnatho- 
pods 1 and 2 almost equally long, 6!" joint narrowly piriform im gnatho- 
pod 1, obliquely oblong in gnathopod 2, in the var, gnathopod 1 is said to 
be the larger. Peraeopods 3—5, 24 joint very setose on hind margin. Peraeo- 
pods 3 and 4, 24 joint broader below than above (in var. considerably broader 
above than below). Peraeopod 5, 24 joint broad, strongly and evenly curved 
behind, broadest in the upper half (in var. trapezoidal, broader below than 
above). Uropod 1 reaching at least as far back as uropod 3. Uropod 3 
very short, scarcely '/,, as long as body, (in var. rudimentary, '/,, as long 
as body), outer ramus 2-jointed, less than twice as long as inner, with 
3 spines on apex, 2 or 3 on outer margin (in var. with 4 on apex, 1 on 
outer margin); inner ramus with 1 apical spine. Telson divided (in var. 
short, divided almost to the middle). Colour greyish white (in var. greenish 
white). L. 15 mm. 


Lake Baikal. Depth 2—-10 m. 


20. Gen. Neoniphargus Stebb. 


1899 Neoniphargus (Sp. typ.: N. thomsoni), T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 v.7 p. 424. 


Side-plates 1—4 much deeper than those which follow. Eyes well 
developed. Antenna 1 the longer, accessory flagellum very small, 2-jointed. 
Mouth-parts nearly as in Niphargus (p. 405), but maxilla 1 said to have 
6 spines on outer plate. Gnathopods 1 and 2 similar, subchelate, Stk joint 
distally wide, 6" quadrate. Peraeopod 5 shorter than peraeopod 4. Uropod 3 
not elongate, outer ramus 1-jointed, inner minute. Telson partly cleft. 


1 accepted and 1 doubtful speeies. 


1. N. thomsoni Stebb. 1893 Niphargus montanus (non Gammarus m. A. Costa 
1851!), @. M. Thomson in: P. R. Soc. Tasmania, 1892 p. 70 t.6 f. 1—13 | 1899 Neoni- 
phargus thomsoni, T. Stebbing. in: Tr. Linn. Soe. London, ser.2 0.7 p.425. 


Head, lateral corners very little prominent. Side-plate 1 rounded below, 
4th broad, emarginate. Pleon segments 1—3, postero-lateral corners rounded. 
Eyes relatively large, subreniform, close to lateral margin of head. Antenna 1 
short, 24 joint rather shorter than 1st, and 39 than 24, flagellum rather longer 
than peduncle, with about 14 joints, accessory flagellum rather longer than 
18° joint of primary. Antenna 2 said to be about half as long as antenna 1, 
flagellum shorter than peduncle, 8-jointed. Gnathopods 1 and 2, 5!" joint triangular, 


= 


Br 
Er 
Br 
= 
ü 
jr 


“ 


Neoniphargus, Niphargus 405 


cup-shaped, distally very wide, 6f nearly square, hind margin rugose, palm 
transverse, minutely denticulate. Uropods 1 and 2 reach nearly as far back 
as uropod 3. Uropod 3, outer ramus rather longer than peduncle. Telson 
as broad as long, cleft "to eentr e, apices broad, each carrying 4 spinules. 
Colour whitish yellowish to brown. L. 6 mm. 


Tasmania (swampy ground near top of Mount Wellington about 1200 m). 


N. moniezi (Wrzesn.) 1889 Gammarus puteanus (err., non ©. L. Koch 18351), 
Moniez in: Rev. biol. Nord France, v.1 p.245 | 1890 Niphargus moniezi, Wrzesniowski 


in: Z. wiss. Zool., v.50 p.672, 675, 676 | 1899 N. m., Neoniphargus (part.)?, T. Stebbing 


in: Tr. Linn. Soe. London, ser.2 v.7 p. 425. 


Eyes wanting. @Gmnathopods, 1 aud 2, 6th joint oval. Uropod 3 short, inner 
ramus represented by a scale, oval. broad, „replice“, without apical spines or setae, outer 
ramus l-jointed. Telson double. L. 6—7 mm. 


North of France, Subterranean waters. 


21. Gen. Niphargus Schiödte 


1849 Niphargus (Sp. un.: N. stygius), Schiödte in: Danske Selsk. Skr., ser.5 v.2 
p-26 | 1890 N., Wrzesniowski in: Z. wiss. Zool., v.50 p.620 | 1893 N., A. Della Valle 
in: F. Fl. Neapel, v.20 p.704 | 1894 N., Chilton in: Tr. Linn. Soc. London, ser.2 v.6 p. 165. 


Body compressed, not carinate. Side-plates 1—4 not large. - Eyes 
rudimentary or wanting. Antenna 1 the longer, accessory flagellum not 


more than 2-jointed. Upper lip rounded. Lower lip, inner lobes well developed. 
- Mandible normal, 34 joint of palp longer than 24, Maxilla 1, inner plate 


with few (2 or 3) setae, outer with 7 spines, palp of right and left maxilla 

alike in form. Maxilla 2, inner plate not or very slightly fringed along 
inner margin. Maxillipeds, outer plates not very broad, fringed with spine- 
teeth on inner margin, palp elongate. Gnathopods 1 and 2 similar, subchelate, 
5th joint less wide than 6", 6th joint dilated, finger with nail. Uropod 3, 


_ outer ramus long, 2-jointed, inner very small. Telson more or less deeply eleft. 


10 species accepted, 10 doubtful. 


Synopsis of accepted species: 


1 Accessory flagellum of antenna 1 with 2 joints — 2. 
’ Accessory flagellum of antenna 1 with only 1 joint — 8, 
Antenna 1 longer than the body; telson differing in 

a ee Fer 1. N. eroatieus . p. 406 
Antenna 1 not longer than the body; telson not 


differing ing andQ — 8. 


2 


‚Pleon segment 2, postero-lateral corners rounded, in 

| N ee re EEE UT Br 2. N. forelii . . p.406 
3 Pleon segments 2 and 3, postero-lateral corners more 
or less rounded — 4. 

| Pleon segments 2 and 3, postero-lateral eorners acute 


or quadrate >— 5. 
Side-plates 1—4 not deeper than side-plate 5 .. . 3. N. aquilex. . p.406 
Side-plates 1—4 deeper than side-plate 5 . . . . - 4. N. stygius.. . p. 407 
Gnathopods 1 and 2, 6th joint broader than long — 6. 
Gnathopods 1 and 2, 6th joint longer than broad — 7. 


en NR ORTE RE ER 5. N. puteanus . p. 407 
Without BER ITR ETTT 6. N.virdöi . . . p. 408 


4 


5 


6 


Er ee El ag EEE a ee N EHE, 


e) TERN TEN 
406 Niphargus 
f Gnathopods 1 and 2, 6th joint narrowing distally. . 7. N. fontanus . p.408 
\ Gnathopods 1 and 2, 6th joint widening distally .. 8. N. kochianus p.408 
. f Antenna 1, accessory flagellum tubereuliform . . . 9. N. oreinus. . p.408 
\ Antenna 1, accessory flagellum spine-like .... . 10. N. godeti . . p.409 


1. N. croaticus (Jurinac) 1887 Eriopis croatica, Jurinae in: Rad Jugoslav. 
Ak., 0.83 p.96 t. f.1—12a | 1888 Niphargus eroaticus, Jurinac, Fauna Kroat. Karst., 
p- 11—16 f£. | 1890 N. c., Wrzesniowski in: Z. wiss. Zool., v.50 p. 610, 670, 676, 716 
1889 Gammarus c., Moniez in: Rev. biol. Nord France, v.1 p. 252. 

Pleon segments 1—6, hind margin armed with a close-set row of 
backward pointing spinules. Side-plates successively deeper from 1°: to 34, 
4th less deep than 34. Pleon segments 1—3, postero-lateral corners sub- 
acute. Eyes wanting. Antenna 1 in J rather longer than the body, flagellum 
more than 4 times as long as peduncle, 73-jointed, accessory flagellum 
2-jointed. Antenna 2 less than '/, as long as antenna 1, ultimate joint of 
pedunele longer than penultimate, more than twice as long as the 8-jointed 
flagellum. Gnathopod 1, 6 joint trapezoidal, a little tending to oval, being 
. outdrawn towards the hinge of the finger, palm slightly convex, well defined. 
In the 9 gnathopod 1 appears to have the 6!" joint almost rectangular. 
Gnathopod 2, 6! joint reetangular, palm slightly convex. Peraeopod 3 con- 
siderably longer than peraeopods 1 and 2, but shorter than the long equal 
peraeopods 4 and 5. Peraeopods 3—5, 24 joint comparatively narrow, coarsely 
serrate. Uropod 1, rami equal to peduncle. Uropod 2 shorter, rami longer 
than peduncle Uropod 3 reaching much beyond the others, 1° joint of 
outer ramus 15 times as long as 24, carrying 8 plumose setae and many 
spinules, inner ramus very short, with apical spine and seta. Telson in C 
with a wide arched emargination rather more than '/, of its length, and 
2 or 3 spines on the blunt apices, in O -cleft more than ”/, of length, the 
ineision not rounded but acute, 5—8 spines on the apices. Colour quite 
white. L. Q 18:5, 0 20 mm. 


Croatia (cavern near Zagorije). 


2. N. forelii Humb. 1877 N. puteanus var. f. + N.p. var. onesiensis, A. Humbert 
n: Bull. Soc. Vaudoise, v.14 p.278 t.6,7|1888 N. p. var. f., T. Stebbing in: Rep, Voy. 
Challenger, v.29 p.456 | 1890 N. f., Wrzesniowski in: Z. wiss. Zool., v.50 p. 621, 631, 
668, 674 | 1889 Gammarus puteanus var. f., Moniez in: Rev. biol. Nord France, v.1 
p. 247 | 1882 Niphargus p. var. forellii, G. Joseph in: Berlin. ent. Z., ©.26 p.7. 


Side-plates 1—4 deeper than the following. Pleon segment 2, postero- 
lateral corners rotundo-quadrate, segment 3, postero-lateral corners acute, 
Eyes wanting. Antenna 1 rather less than half as long as body, 1° joint 
of pedunecle nearly as long as 29 and 34 combined, flagellum 16-jointed. 
Antenna 2, ultimate joint of pedunele rather shorter than penultimate, 
flagellum 7—-9-jointed. Inner lobes of lower lip not mentioned. Gnatho- 
pods 1 and 2 similar, 6% joint moderately broad at base, widening towards 
the straight palm at right angles with the convex hind margin; palm rather 
longer in gnathopod 2 than in gnathopod 1. Peraeopods 1—3 subequal, 
shorter than peraeopods 4 and 5. Peraeopods 3—5, 24 joint rather broad, 
according to figure. Uropod 3, outer ramus with 24 joint well developed. 
Telson eleft about ®/, of length. L. 9 mm. 


Switzerland (Lake of Geneva, well at Onex). 
3. N. aquilex Schiödte 1841 Gammarus puteanus (part.: forma II), C. L. Koch, 


C.M. A., 0.36 or. 22 | 1889 @.p. (part.: forma II), Moniez in: Rev. biol. Nord France, 
v.1 p.245 | 1853 Niphargus stygius (err., non Gammarus s., Schiödte 1847!), Westwood 


Niphargus ö 407 


in: Ann. nat. Hist., ser.2 v.12 p.44 | 1855 N. aqwilex, Schiödte in: Ov. Danske Selsk., 
p- 350 f. | 1888 N. a. (part.), T. Stebbing in: Rep. Voy. Challenger, v.29 p.158, 287, 304, 
316, 448, 456 | 1890 N. puteanus var. vejdovskyi, Wrzesniowski in: Z. wiss. Zool., 0.50 
p- 655 t.27 £.6,9—11, 15; t.28f.1—3; t.30 f.3 | 1893 N. subterraneus (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p.704 t. 38 f. 31—34. 


Body long and narrow. Side-plates I—4 not deeper than 5tt. Pleon 
segments 1—3, postero-lateral corners rounded. _Eyes wanting. Antenna 1, 
18 joint nearly as long as 22 and 39 combined, 34 abouthhalf aslong as 24 ‚flagellum 
with about 20 joints, accessory flagellum very small, 2-jointed. Antenna 2 
much shorter but with longer pedunele, ultimate joint of peduncle a little 
shorter than penultimate, flagellum 7- or 8-jointed. Gnathopods 1 and 2, 


‚5b joint much narrower than 6, 6th rounded triangular, widening to the 


palm, which is long, straight, defined by a spine at the obtuse angle. Peraeo- 
pods 1—3 subequal, peraeopods 4 and 5 rather longer. Peraeopods 3—5, 
24 joint oblong oval. Uropods 1 and 2 very short, uropod 3 very long, 
especially in 9, peduncle short, outer ramus very long, 24 joint in J nearly 
as long as 1°, in © much shorter, inner ramus short, rudimentary. Telson 
short, deeply cleft, apices obtuse. Colour whitish, pellueid. L. S reaching 
20, oQ 12:5 mm. 

Hurope (south of England, St. Briac, Leyden, Cologne, wells in Bohenia (var. 
vejdovskyi), and other places). 


4. N. stygius (Schiödte) 1847 Gammarus s., Schiödte in: Ov. Danske Selsk., 
p-81 | 1849 Niphargus s., Schiödte in: Danske Selsk. Skr., ser.5 v.2 p.26 t.3 | 1890 
N. s., Wrzesniowski in: Z. wiss. Zool., v.50 p. 603, 620, 665. 


Body long and narrow. Side-plate 3 slightly deeper than 4%, 4% than 
Stk, Pleon segments 1—3, postero-lateral corners in figure slightly rounded. 
Eyes wanting. Antenna 1, 1° joint rather longer than 24, 34 half as long 
as 24, flagellum 16—25-jointed, accessory flagellum very small, 2-jointed. 
Antenna 2 ?/, as long as antenna 1, ultimate and penultimate joints of pedunele 
subequal, flagellum 7—9-jointed. Maxilla 1 with 7 spines on the outer 


. plate, but figured with several setae on the inner plate and a great number 


on the outer margin of the palp’s 24 joint, peculiarities not to be acceptsd 
without corroboration. Gnathopods 1 and 2 very setose according to figure, 
5th joint triangular, much shorter. than 6, 6 Jonger than broad, widest 
at the somewhat oblique palm, which is well defined by a strong spine at 
the angle.e Gmnathopod 2 rather larger than gnathopod 1. Peraeopods 1 
and 2 slender, equal, shorter than the 3 following, which successively encrease - 
in length, with oval 24 joint. Uropods 1 and 2 short, each with equal rami. 
Uropod 3, inner ramus ind '/,,„, inQ !/, as long as outer, tipped with 2 spinules 
and a seta, outer ramus with 1°!joint in C thrice as long as pedunele and subequal 
to 24 joint, in Q twice as long as peduncle and twice as long as 24 joint. Telson 
eleft beyond the middle, apices- subacute. Colour snow-white. L. 10—14 mm. 

Caves of Adelsberg and Lueg in Krain. 

F 5. N. puteanus (C. L. Koch) 1835 Gammarus p. (part.: forma I), ©. L. Koch, 
6. M. A., 0.5 nr.2|1862 Niphargus p., Bate, Cat. Amphip. Brit. Mus., p. 177 t.32 f.4 | 
1890 N. ratisbonensis, Wrzesniowski in: Z. wiss. Zool., v.50 p. 662, 673, 696. 

Scarcely distinguishable from N. stygius, except in having yellow eyes, 
gnathopods 1 and 2, 6% joint very large, almost rectangular, broader than 
long, and the otherwise pellueid body streaked along the edges of the peraeon 
segments and to the and of pleon with a yellow ochre stripe. L. 12°5 mm. 


Regensburg, in wells; also at Poitiers. 


408 Niphargus 


6. N. virei Chevreux 1896 N. »., Chevreux in: Bull. Mus. Paris, v.2 p. 136. 


O..»Body less slender than usual in Niphargus. Pleon segment 5 
with 6 very minute dorsal spines, segment 6 with 8. Head, lateral corners 
very prominent, rounded. Anterior side-plates much deeper than their 
segments, 4!" much deeper than 5", Pleon segments 1—3, postero-lateral 
corners quadrate with slightly acute point. Eyes wanting or rudimentary, 
perhaps represented by irregular blotches of yellowish pigment, which 
disappear in spirit. Antenna 1 °/, as long as body, flagellum 44—-56-jointed, 
accessory flagellum 2-jointed. Antenna 2 very short, flagellum a little longer 
than ultimate joint of peduncle, 15-jointed. Gnathopod 1, 6* joint almost 
quadrangular, a little broader than long, finger matching palm. Gmnathopod 2, 
6th joint considerably larger than in gnathopod 1, subtriangular, tending to 
quadrate, much broader than long, twice as broad as the 5!" joint, finger 
strongly curved, slightly shorter than palm. Peraeopods 1-—5 slender and 
very elongate. Uropod 3, inner ramus rudimentary, outer very long, 24 joint 
less than half as long as 1°. Telson as broad as long, squarely truncate, 
. with a wide emargination oceupying ”/, of the length, each lobe ending in 
6 strong spines and carrying a group of 3 spines and a setule towards the 
middle of the outer margin. L. 25—31 mm. 


Jura. ÜCaves. 


7. N. fontanus Bate 1859 N.f.. Bate in: P. Dublin Univ. zool. bot. Ass., o.1 
p-237 £. | 1862 N. f., Bate, Cat. Amphip. Brit. Mus., p.175t.32f.2 1890 N. f., Wrzesniowski 
in: Z. wiss. Zool., 0.50 p.665 | 1893 N. subterraneus (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 704. 

Comparatively robust. Side-plate 4 the deepest. Pleon segments 1—3, 
postero-lateral corners acute. Eyes very small, of irregular shape, bright 
lemon. Antennae 1 and 2 as in N. aquilex (p. 406). Gmathopods 1 and 2 
alike, 5th joint narrow, 6' large, the base much wider than the 5%, pear- 
shaped, narrowing from the palm to the hinge of finger, palm very oblique, 
much longer than hind margin, defined by a strong palmar spine, finger 
long, much eurved. Peraeopods 1 N. stygius (p. 407). Uropod 3, 
24 joint of outer ramus shorter than 1%. In the © gnathopods 1 and 2 
have the 6tk joint shorter and less distinetly pear-shaped, and uropod 3 
has the 2° joint of outer ramus much shorter than 1°. Telson apparently 
as in N. aquilex. L. 12:5 mm. 


South of England. Wells. 


8. N. kochianus Bate 1859 N. k., Bate in: P. Dublin Univ. zool. bot. Ass., vo. 1 
p.237 £. | 1862 N. k., Bate, Cat. Amphip. Brit. Mus., p.176 t.32 f.3 | 1890 N. k., 
Wrzesniowski in: Z. wiss. Zool., v.50 p.665 | 1898 N. subterraneus (part.), A. Della 
Valle in:. F. Fl. Neapel, ©. 20 p. 704. 

In elose agreement with N. fontanus except in regard to gnathopods 1 
and 2, 6tk joint, which approaches in form an imperfect oblong square, abruptly 
wider than the 5t% joint, and widening slightly to the sinuous palm, this 
being nearly at right angles with the serrate hind margin. Nothing is 
said about eyes. Uropod 3 figured with a very short 24 Era to outer 
ramus. L. about 8 mm. 


England (Hampshire and Wiltshire), Ireland (Dublin). Wells. 


9. N. oreinus Joseph 1869 N. o., G. Joseph in: Jahresber. Schles. Ges., v.46 p.52 | 
1890 N. o., Wrzegniowski in: Z. wiss. Zool., e.50 1.669. 676 | 1889 Gammarus o., Moniez 
in: Rev. biol. Nord France, v.1 p.252 | 1893 Niphargus subterraneus (part.)?, A. Della 
Valle in: F. Fl. Neapel, 0.20 p. 705, 


ba WE a BE AT DE Fr u 
f Mr Ra: 
rn L { J . 


Niphargns 409 


Somewhat robust. Head somewhat acutely rostrate. Eyes wanting. 
Antenna 1 short, in the G "/,, in the © "/, of length of body, 24 joint 
longer than 1%, 34 ?/, as long as 24, flagellum twice as long as peduncle, 
34-jointed, accessory flagellum represented by a small-tubercle carrying 1 seta. 
Antenna 2 half as long as antenna 1, ultimate joint of peduncle rather longer 
than penultimate, flagellum 13-jointed. Mouth-parts said to differ from those of 
other species. Gmathopods 1 and 2, 5th joint short, triangular, 6!" large, 
rotundo-quadrate, palm defined by a elaw-like inward-direeted strong tooth 
(palmar spine?), finger large, curved. Peraeopods 1 and 2 strong, slender. 
Peraeopod 5 the longest. Uropods 1 and 2 short. Uropod 3, outer ramus 
in S 6 times as long as pedunele, its 29 joint half as long as 1°, inner ramus 
short, laminar, almost as long as pedunele, more setose in © than in Q. 


‚Telson deeply eleft, the conical halves as long as peduncle of uropod 3, 


armed with spines. Colour clear yellowish grey, tip of finger and tooth of 
palm in gnathopods 1 and 2 flesh-coloured. L.C 51, oO 475 mm. 


Krain. Stalactite-caves. 


10. N. godeti Wrzesn. 1867 Gammarus puteanus (err.. non C. L. Koch 1835!), " 
Godet in: Bull. Soe. Neuchatel, v.7 p.424 | 1889 G.p., Moniez in: Rev. biol. Nord 
France, v.1 p.252 | 1890 Niphargus godeti, Wrzesniowski in: Z. wiss. Zool., v.50 
p.668, 674. 


Side-plate 4 much the largest. Pleon segments 1—3, postero-lateral 
corners rounded. Eyes wanting. Antenna 1 almost as long as body, flagellum 
6 times as long as peduncle, 51-jointed, accessory flagellum spine-like. Antenna2 
very short, little more than '/, as long as antenna 1. Gnathopods 1 and 2, 
6'h joint spoken of as triangular, but in fact figured as rather broad at base 
though widening to the slightly convex, not oblique palm. Peraeopods 3—-5 
seemingly subequal in length, 2“ joint rather broad, hind margin coarsely 
serrate. Uropod 3 more than half as long as body, outer ramus with very 
long 24 joint. L. 33 mm. 

Neuchätel. Well. N 


N. casparianus Wrzesn. 1849 Gammarus puteanus (err., non ©. L. Koch 1835)), 
Caspary in: Verh. Ver. Rheinlande, 0.6 p.39 t.2 | 1850 @. p., Hosius in: Arch. Naturg., 
v.161 p.233 | 1890 Niphargus casparianus, Wrzesniowski in: Z. wiss. Zool., v.50 p.664, 673. 


Scarcely distinguishable from N. kochianus. 
Germany (Elberfeld, Bonn). 


N. caspary (Pratz) 1866 Gammarus e., Pratz, Grundw. 'Thiere | 1889 @. e., 
Moniez in: Rev. biol. Nord France, v.1 p.230 | 1890 Niphargus e., Wrzesniowski in: 
Z. wiss. Zool., v.50 p. 666. 


Gmathopods 1 and 2 with 6th joint triangular (probably widening from the 
base). Uropod 3 in S, 1st joint of outer ramus 4—5 times as long as peduncle, 24 
joint short; in Q outer (Moniez: „interne“) ramus 1-jointed, the joint searcely longer 
than peduncele. 


Munich. Well. 


N. elegans Garbini 1894 N. e.+N. e. var. imperfectus + Gammarus flwviatilis 
var. .manophtalmus, Garbini in: Mem. Acc. Verona, ser. 350.70 p. 108,109 | 1895 N. e. + 
N. e. var. i. + @. f. var. m., Garbini in: Mem. Ace. Verona, ser.3 v.71ı p. 33, 38, 31. 


Near to N. tatrensis (p. 410), differing by want of spine-rows on pleon segments 
1—3, by greater number of joints in antennae 1 and 2, by relative length of joints 
und. armature of uropod 3 ete. Eyes developed to wanting. 


Verona. 


410 Niphargus 


N. longieaudatus (A. Costa) 1851 Gammarus longicaudatus, @. longicauda 
(non F. Brandt 1851!), (A. Costa in:) F.W. Hope, Cat. Crost. Ital., p.45, 23 | 1857 
@. longicaudatus, A. Costa in: Memı. Ace. Napoli, v.1 p.217 t.4 £.6 | 1890 Niphargusl. 
(part.), Wrzesniowski in: Z. wiss. Zool., e.50 p. 603, 625, 674 | 1893 N. subterraneus 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 704. 


Probably the same as N. aquilex (p. 406). L. 12:5 mm. 
Naples. In the drinking water. 


N. minutus (Gerv.) 1835 Gammarus pulex m., P. Gervais in: Ann. Sci. nat., 
ser.2 v.4 p.128 | 1859 @. lacteus, P. Gervais & P. .J. Beneden, Zool. med., v.1 p.488 | 
1890 @.1., Wrzesniowski in: Z. wiss, Zool., e.50 p.602 | 1893 @. fluviatilis (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 763. 


L. minute. 


Neighbourhocd of Paris. Only in wells. 


N. montanus (A. Costa) 1851 Gammarus m., (A. Costa in:) F.W. Hope, Cat. 
Crost. Ital., p.44 | 1857 @. m., A. Costa in: Mem. Acc. Napoli, v.1 p.218 t.4 f.7,8| 
1867 @. longicaudatus var., A. Costa in: Annuario Mus. Napoli, v.4 p.38 | 1890 Niphargus 
longicaudatus (part.), Wrzesniowski in: Z. wiss. Zool., v.50 p. 674. 


Agreeing nearly with N. longieaudatus but differing in uropods and telson. 
L. 12:5 mm. 


Italy (Lake Matese). 


N. ponticus Üzern. 1868 N.p., Üzerniavski in: Syezda Russ. Est., Syezda 1 
Zool. p.108 t.8 f.12—14 | 1888 N. p., T. Stebbing in: Rep. Voy. Challenger, v.29 
p-378 | 1890 N.? p., Wrzesniowski in: Z. wiss. Zool., v.50 p.673 | 1893 N. subterraneus 
(part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 705. 


L. about 2 mm. 
Black Sea. 


N. rhipidiophorus (Catta) 1878 Gammarus r., Catta in: Act. Soc. Helvet., 
Sess. 60 p. 257 | 1889 @. r., Moniez ih: Rev. biol. Nord France, v.1 p.252 | 1892 @. r., 
Chevreux and Guerne in: Bull. Soc. zool. France, v.17 p.140 | 1888 Niphargus r., 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.475 | 1890 N.? r., Wrzesniowski in: Z. 
wiss. Zool., v.50 p. 607, 673 | 1898 Gammarus pungens (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 764. 


’ 


Eyes small. Peraeopod I with brush of long setae on 5th and 6th joints. 
Uropod 3 enormous. 


France (a well, brackish in summer, at La Ciotat, near the Mediterranean). 


N. subterraneus (Leach) 1813/14 Gammarus s., Leach in: Edinb. Ene., ©.7 
p. 402 | 1893 Niphargus s. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 704 | 1888 
N. aquilex (part.), T. Stebbing in: Rep. Voy. Challenger, 0.29 p. 84. 

London. Well. 


N. tatrensis Wrzesn. 1888 N. t., Wrzesniowski in: Pam. Fizyjogr., v.8 p.47 
t.6—16 | 1890 N. t., Wrzesniowski in: Z. wiss. Zool., v.50 p.643 t.27 £.1—5,7, 8, 
12—14; t.28 £.4, 5,8; t.29 £.1—8, 12; t.30 £. 11-13; t.31 £.5, 14, 14a, 18—21; t. 32 
{.1, 8, 8a. 

Perhaps identical with N. stygius (p. 407); but said to be distinguished by the 
postero-lateral corners of the pleon segments I—3, the 6th joint.of the gnathopods 
l and 2, the relative length of peraeopods 3 —5, the relative length of the apical joint 
in uropod 3, and the setose armature of the mouth-parts. 


Tatra Mountain. 


ie an a 


a HE DS EEE Ep EL rn 222 Deu Te a ha nl ua my Dunn da nn Dan ar le ia tn u BERN ERBETEN zu 


Eriopisa 4ll 


22. Gen. Eriopisa Stebb. 


“ 1859 Eriopis (non E. Mulsant 1851, Coleoptera!), R. M. Bruzelius in: Svenska 
Ak. Handl., n.ser. ©.3 nr.1 p.64 | 1890 Eriopisa, T. Stebbing in: Ann. nat. Hist., ser. 6 
0.5 p.193|1893 E., A. Della Valle in: F. Fl. Neapel, v.20 p.705 | 1894 E., G. O. Sars, 
Crust. Norway, v.1 p.514 | 1890 Eriopsis, Wrzesniowski in: Z. wiss. Zool., v.50 p. 632. 


Body slender and smooth. Head not rostrate. Side-plates all shallow. 


‚Eyes wanting. Antenna 1 much the longer, accessory flagellum small, 


2-jointed. Upper lip rounded. Lower lip with inner lobes. Mandible normal, 
spine-row with many spines, palp slender, 39 joint longer than 24. Maxilla 1, 
inner plate with numerous setae, outer with 7 spines, 24 joint of palp with 
3 or 4 spine-teeth. Maxilla 2, inner plate fringed on ?/, of inner margin. 
Maxillipeds, inner plates squarely truncate, outer fully reaching middle of 
palp’s 24 joint, with setiform spines on apical margin, spinules of inner 
margin not close to the edge, 39 joint of palp wide, finger slender, tipped with 
a spine. Gmathopods 1 and 2 subchelate, unlike and unequal, finger without 
nail or dentiele, gnathopod 2 the larger. Peraeopod 5 the longest, with 24 
joint larger than in the other peraeopods. Uropod 3, inner ramus very 
small, outer very long, 2-jointed, the joints laminar. Telson deeply_cleft. 
1 species. 


1. E. elongata (Bruz.) 1859 Eriopis e.. R.M. Bruzelius in: Svenska Ak. Handl., 
n. ser. ©.3 nr.1 p.65 t.3 f.12 | 1871 Niphargus elongatus, A. Boeck in: Forh. Selsk. 
Christian., 1870 p.136 | 1876 N.e., A. Boeck, Skand. Arkt. Amphip., v.2 p.403 t. 22 
f.5 1890 Eriopsis elongata, Wrzesniowski in: Z. wiss. Zool., v.50 p.632 | 1893 Eriopisa e., 
A. Della Valle in: F. Fl. Neapel, v.20 p.706 t.38 f.17---30; t.60 f.5 | 1894 E. e., 
G. O. Sars, Crust. Norway, v.1 p.515 t.181 f.2 ! 1895 E.e., A. M. Norman in: Ann. 
nat. Hist., ser.6 v.15 p. 490. 


Body elongate. Head, lateral corners slightly projeeting, rounded, post- 
antennal corners dentiform. Side-plates scarcely eontiguous, 1° angularly 
produced forward, 4" Jittle larger than 5t" and like it in shape. Pleon 
segment 3, postero-lateral corners produced into a small tooth. Antenna 1 as 
long as body, 1°t joint not longer than 24, with slender spine at apex, 34 little 
over !/, as long as 24, flagellum nearly thriee as long as pedunele, 32-jointed, 


- aceessory flagellum shorter than 1st joint of primary. Antenna 2 little longer 


than pedunele of antenna 1, ultimate joint of pedunele shorter than penultimate 
and subequal to the 6-jointed flagellum. Gmnathopod 1, 24 joint as in 3 following 
limbs very narrow at base, 5th joint as long as 6" but narrower, 6" triangular, 
palm and hind margin almost at right angles one to other. Gnathopod 2 
much larger, 5® joint triangular, cup-shaped, much shorter than 6, 6th oblong 
oval, narrowing distally, palm very oblique, ill-defined, long, a little notched, 
armed with some strong spines, finger eiliated on inner margin. Peraeopods 1 


and 2, 5th joint rather expanded. Peraeopod 3, 24 joint narrowly oval. 


Peraeopod 4 longer, 24 joint considerably wider. Peraeopod 5 with 24 joint oval, 
much larger than in peraeopod 4, hind margin strongly serrate as also in 
peraeopods 3 and 4. Uropods 1 and 2 of very moderate size. Uropod 3, 
pedunele short, inner ramus not quite equal to it, outer ramus as long as 
pleon. segments 1—5 combined, both joints laminar, fringed witl spinules, 
24 rather the shorter, its truncate apex armed with dense brush of setae. 
Telson scarcely as long as pedunele of uropod 1, subtriangular, cleft close to 
base, apices acute, with spine and setule in notch formed by external tooth 
a little way up lateral margin. Colour yellowish. L. 11 mm: 

Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (South- and West-Norway 
to Lofoten Isles, depth 94—752 m; Bohuslän; Great Britain); Kattegat; Mediterranean. 


412 Gmelina 


23. Gen. Gmelina 0. Sars 


1894 Gmelina, (0. Grimm in MS.) G.O.Sars in: Bull. Ae. St.-Petersb., ser. 5 
v.1 p.191. 


Head with small rostrum, lateral lobes rather small. Side-plates 1—4 
larger in © than in CO, 4 not very wide, nor strongly emarginate. Antennae 1 
and 2 subequal, not elongate, slender, accessory flagellum 1-jointed. Mouth- 
parts nearly as in Gammarus (p. 460), but upper lip with no emargination at apex 
and with an obtuse prominence in front. Maxilla 2 with outer plate considerably 
broader than inner, palp of maxillipeds rather short, with 34 joint distally 
expanded. Gmathopods 1 and 2 alike, subchelate, feeble in Q, stronger in GC. 
Peraeopods 1-—5 not elongate, successively shorter to peraeopod 3 and thence 
successively longer, 24 joint rather larger and more laminar in peraeopod 5 
than in 3 or 4. Uropod 3 more or less projeeting, outer ramus well developed, 
with very small 24 joint, inner ramus small, scale-like. Telson deeply_cleft. 


, . 
4 species. 


Synopsis of species: 


| Many segments with conspieuous projeetions. — 2. 
1 N i £ SR 
o segments with conspieuous projeetions — 8. 
9 [ With median dorsal carina . . . -. u... 1. @. costata . . . p.412 
Without median dorsal earina . ......2.u 2. G. kusnezowi . p.413 
„ 5 Uropod 3, inner ramus longer than peduncle. . . 3. G. laeviuscula . p.413 
\ Uropod 3, inner ramus not longer than pedunele . 4. G. pusilla . . - p.41l4 


1. G. costata O. Sars 1894 @. e. (O. Grimm in MS.), (Palasiella macera in MS.) 
G. ©. Sars in: Bull. Ace. St.-Petersb., ser.5 «.1 p.192 t.3. 


Very slender and compressed, especially in C, integument erustaceous, 
median dorsal earina beginning faintly on peraeon segment 1, reaching highest 
elevation on pleon segment 3, the obtusely triangular laminar process on 
this and on the next preceding and 2 following segments being very con- 
spicuous, pleon segments 4 and 5 ending in upturned points, segment 6 
smooth. On peraeon segments 1—-7 prominences near the side-plates form 
a low obtuse lateral keel. Head, rostrum triangular, not elongate, lateral 
lobes broadly truncate, post-antennal corners acute. Pleon segment 2, 
postero-lateral corners acutely produced, in segment 3 acute, subquadrate. 
Eyes oval reniform, not large, dark. Antenna 1, 1° joint nearly as long 
as 24 and 34 combined, 24 not twice as long as 34, flagellum little longer than 
pedunecle, with about 16 short joints, aecessory flagellum with 3 setules at tip. 


Antenna 2 in JS. equal to antenna 1, ultimate joint of pedunele as long as 


penultimate, flagellum 8-jointed, in O rather shorter than antenna 1, ultimate 
joint of pedunele shorter than penultimate, flagellum 6-jointed. Gmathopods 1 
and 2 in CS, 6% joint much longer than 5%, large, oblong oval, widening 
a little to the concave palm, which is defined by a nearly rectangular lobe, 
armed with 2 strong spines, between which the strongly eurved finger 
impinges. Gnathopod 1 in O feeble, 6 joint longer than 5%, oblong 
quadrangular, palm rather oblique; gnathopod 2 rather more slender, 6% joint 
as long as 5t"%, palm nearly transverse. Peraeopods 3 and 4, 24 joint little 
expanded, narrowing distally. Peraeopod 5, 24 joint oblong quadrangular. 
Uropod 2 the smallest, the rami linear, with spines only at the apex. Uropod 3 
large, projecting far beyond the others, peduncle short and thick, outer 
ramus large, foliaceous, margins setose and spinulose, apex broad, with a 


Gmelina 413 


diminutive 24 joint, inner ramus rather longer than broad. Telson longer 
than broad, projeeting beyond peduncle of uropod 3, eleft more than °?/, length, 
outer margin finely eiliated, the lobes narrowing to obtuse divergent apices, 
each armed with a spinule and setules. 1.09 12, 16 mm. 


Caspian Sea. Depth 0—38 m. 


2. G. kusnezowi (Sowinski) 1894 Gammarus k., Sowinski in: M&m. Soc. Kiew, 
v.13 p.883 t.8 | 1894 Gmelina k. (Pallasiella mammillifera in MS.), G. O. Sars in: 
Bull. Ace. St.-Pötersb., ser.5 v.1 p. 197 t.4. 


Rather slender and compressed, and more so in S than in 9, integument 
cerustaceous, with no median dorsal carina, but with a pair of subdorsal 
prominences on each segment from peraeon segment 1 to pleon segment 3, 
gradually encreasing from low tubereles to conspieuous knobs; peraeon 
segments I—5 (or 1—6) with conspieuous lateral projeeting tubereuliform 
prominences; pleon segments 4—6 dorsally smooth, except that on 5 and 
6 there are 2 faseieles of spinules. Head tapering, rostrum short and narrow, 
lateral lobes narrowly rounded, with a boss-like process above the post- 
antennal corners. Pleon segments 2 and 3, postero-lateral corners acute, 
subquadrate. Eyes oval reniform, highly protuberant, very dark. Antenna 1 
short, 1° joint little longer than 24, 24 twice as long as 34, flagellum shorter 
than peduncle, with 15 short joints; accessory flagellum with 3 setules. 
Antenna 2 subequal to antenna 1, ultimate joint of peduncle shorter than pen- 
ultimate, flagellum 6-jointed. Gnathopods 1 and 2 nearly as in G. costata, but 
gnathopod 2 in © with palm more oblique. Peraeopods 1—5 and uropods 1 
and 2 nearly as in G. costata. Uropod 3 a little projeeting beyond uropod 1. 
outer ramus tapering to a narrowly truncate apex, the small but distinet 
2 joint carrying several setules, inner ramus a little longer than broad, 
tapering. Telson broader than long, scarcely as long as peduncle of uropod 3, 
cleft deep, scarcely dehiscent, the lobes obtusely rounded, 2 spinules on 
outer and 4 on apical margin of each. Colour in dark transverse bands. 
L. o 14, 0 18 mm. 


Sea of Azov, Caspian Sea. 


3. G. laeviuscula O.Sars 1896 @.Ll., G. O. Sars in: Bull. Aec. St.-Pötersb., 
ser.5 v.4 p.480 1.2 f.8—12. 


unknown. — ©. Rather slender, much compressed, without any 
distinet tubereles or processes, pleon segments 4—6 dorsally tipped with 
small bristles. Head slightly tapering, rostrum well marked, lateral lobes 
slightly produced, narrowly rounded. Pleon segment 3, postero-lateral corners 
slightly produced, 24 segment simply quadrate. Eyes very small, oval, dark. 
Antenna 1 rather the longer, flagellum shorter than peduncle, 10-jointed. 
Antenna 2, ultimate joint of peduncle shorter than”penultimate, flagellum 
about half as long as peduncle. Gnathopods 1 and 2 rather powerful, these and 
peraeopods 1I—5 seeming to agree with those of the 2 preceding species. 
Uropod 1 twice as long as uropod 2. Uropod 3 rather robust, projecting 
somewhat beyond the others, outer ramus very broad, foliaceous, fringed 
with fascieles of spinules, 24 joint small, inner ramus nearly half length of 
outer, not very narrow, nearly thrice as long as broad, tipped with spinules. 
Telson rather large, oval, cleft nearly to the base, lobes scarcely at all 
dehiscent, each with 4 or 5 spinules on outer margin, and about 7 on 
broadly truncate apex. L. 7 mm. 


North Caspian Sea. 


Ba a a a 


414 Gmelina, Gmelinopsis 


4. G. pusilla O. Sars 1896 @.p., @.0.Sars in: Bull. Ae. St.-Pötersb., ser. 5 
0.4 p.432 t.2 1.1321. ; 


oO. Rather short and stout, somewhat compressed, smooth. Head 
slightly tapering, rostrum small, distinet, lateral lobes angularly produced. 
Side-plate 1 expanded below and produced forward. Pleon segments 2 and 3, 
postero-lateral corners quadrate. Eyes small, rounded oval, dark. Antenna 1 
feeble, 24 joint subequal to 1°, 3° much smaller, flagellum as long as peduncle, 
7-jointed. Antenna 2 stouter, scarcely longer, flagellum small, 4-jointed. 
Gnathopods 1 and 2 feeble, setose, in gnathopod 1 the 6% joint oblong oval, 
palm rather oblique, in gnathopod 2 more slender, not longer than 5t", oblong 
quadrate, palm transverse. Peraeopods 1—5 nearly as in G. laeviuscula 
(p. 413), but peraeopods 3—5 relatively shorter, more setose, and 24 joint of 
peraeopod 5 broader, irregularly oval. Uropod 1 not twice as long as uropod 2. 
Uropod 3 much less robust than in G. laeviuscula, outer ramus tapering, 
with few fascicles of spinules, 29 joint small, distinet, inner ramus narrow, 
about '/;, as long as outer, with one apical spinule. Telson longer than 
broad, celeft nearly to base, lobes each with 2 spinules on outer margin and 
2 unequal ones on narrow apices. L. 5 mm. — © unknown. 


North Caspian Sea. 


24. Gen. Gmelinopsis 0. Sars 
1896 Gmelinopsis, G. O: Sars in: Bull. Ac. St.-Petersb., ser.5 v.4 p. 434. 


Peraeon segment 7 and pleon segments 1—3 dorsally carinate; marginal 
tubercular carinae on peraeon segments 1—7. Side-plates 1—4 rather deep. 
Antennae 1 and 2 short, slender. Antenna 1 the longer, accessory flagellum 
small, 2-jointed. Mouth-parts nearly as in Gmelina (p. 412). Gnathopod 1 
stronger than gnathopod 2. Peraeopod 5, 24 joint strongly expanded. Uropod 3 
rather short, outer ramus with small narrow 24 joint, inner ramus small, 
scale-like. Telson more or less deeply eleft, lobes apically narrow. 


2 species. 


Synopsis of species: 


Telson cleft nearly to base, lobes widely dehisceent . . . 1. G. tuberculata . p.414 
Telson eleft only to middle, lobes scarcely dehisceent . . 2. G.aurita . . . p.415 


1. EG. tuberculata O.Sars 1896 @. t., G.O.Sars in: Bull. Ae. St.-Pötersb., ser. 5 
v.4 p.485 1.8 f.1-—19. 


Peraeon segment 7 and pleon segments 1—3 with median dorsal carina 
formed by low obtusely rounded laminar expansions; peraeon segments 1—7 
with distinet lateral tubereles, pleon segments 4—6 smooth. Head with 
small distinet rostrum, lateral lobes small, angular, below each of them a 
conspieuous boss-like prominence extends obliquely downward. Side-plates 
1—4 deep, not very broad, slightly erenulate distally; side-plate 4 slightly 
emarginate behind. Pleon segments 1—3, postero-lateral corners rounded 
off. Eyes rather small, oblong oval, slightly protuberant. Antenna 1, 1° joint 
as long as 24 and 34 combined, flagellum longer than peduncle, 12-jointed, 
24 joint of accessory flagellum minute. Antenna 2 little more than half 
as long as antenna 1, ultimate joint of pedunele much shorter than penultimate, 
flagellum scarcely longer than ultimate, 4-jointed. Gnathopod 1, 5 joint 
short, eup-shaped, 6t large, oblong oval, palm rather oblique, defined by an 
obtuse corner, carrying a strong spine. Gnathopod 2 much feebler, 6" joint 


ee ER 


| 
un call ira a a na 


Aida aa De 


Er Kane 


Gmelinöpsis, Hakonboeekia 415 


shorter and much narrower, oblong quadrangular, palm nearly transverse. 
Peraeopods 1—5 rather slender and spinulose, 4" longer than 34 or Stk, 
in 34 and 4b 24 joint oblong oval, rather narrowed distally, larger in 
peraeopod 4 than in 3. Peraeopod 5, 24 joint greatly expanded, almost 
heart-shaped, its greatest breadth being below, hind margin minutely erenulate 
and setuliferous. Uropods 1 and 2 with subequal rami, apically tufted with 
strong spines. Uropod 3 rather short and thiek, reaching little beyond the 
others, outer ramus rather thick, slightly curved, apex of 1° joint much 
broader than the small 2° joint, inner ramus less than twice as long as 
broad. Telson eleft nearly to base, the lobes tapering, their narrow apices 
standing wide apart, each armed with a spinule and a hair. L. © 8 mm. 


Caspian Sea. Deptl 53 m. 


- 2. G. aurita O.Sars 1896 @.a., @.O.Sars in: Bull. Ae. St.-Pötersb., ser. 5 
v.4 p.437 t.3 f. 20—28. 


O. Peraeon segments 6 and 7 and pleon segments 1—3 with median 
dorsal carina formed by laminar expansions, rounded on pleon segment 3, 
triangular on the others. Peraeon segments 1—7 with lateral tubercles less 
prominent than in G. tubereulata. Pleon segments 4—6 short and stout, 
with small hairs dorsally, segment 6 with a very minute denticle on each 
side. Head, lateral lobes small, obtuse-angled, lateral protuberances greatly 
developed, these spiniform projeetions extending obliquely downward and 
looking as seen from above like a pair of pointed ears. Side-plates 1-4 
rather less deep than in @. tubereulata. Pleon segments 2 and 3, postero- 
lateral corners subquadrate. Antenna 1, flagellum shorter than peduncle, 
10-jointed. Antenna 2 more than half as long as antenna 1. Telson triangular, 
about as long as broad at base, distally conically tapered, eleft narrow, reaching 
only to middle, apices acute, each armed with a spinule and 2 hairs. Other parts 
nearly as in G. tubereulata, but gnathopods 1 and 2 rather less unequal. 
L. 8 mm. — © unknown. 


Caspian Sea. Depth 203 m. 


25. Gen. Hakonboeckia Stebb. 


1899 Hakonboeckia (Sp. un.: H.strauchii), T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 v.7 p.425. : 


Near to Axelboeckia (p. 391) and Gmelinopsis. Peraeon segments with 
margins acutely produced. Head with rostral and lateral projections. Antenna 1 
longer than antenna 2, peduncle of antenna 1 equal to peduncle of antenna 2; 
accessory flagellum very small. Gmathopod 1, 6!" joint like that of gnatho- 
pod 2, but longer. Peraeopods 3—5, 24 joint broad, not produced down- 
ward. Uropod 3, rami subequal, outer (seemingly) 1-jointed. Telson eleft 
nearly to base. 


1 species. 


1. H. strauchii (Dyb.) 1874 Gammarus s., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p. 112 t.12 f£.7 | 1899 Hakonboeckia s., T. Stebbing in: Tr. Linn. Soe. 
London, ser.2 v.7 p.425 | 1893 Gammarus strauchi, @.locusta (part.)?, A. Della Valle 
in: F. Fl. Neapel, v.20 p. 930. 


Peraeon segments 1—7, like serrate edge of a roof broadly expanded in 
outward and downward direeted pointed angles over the side-plates, most strongly 
in segments 1—5. Peraeon segments 6 and 7, and pleon segments 1—3 each 


Te a EEE | Re ur Fr 
Bo: 5% 3 RN = ae a 


416 Hakonboeckia, Baikalogammarus 


with mid hind margin a little thiekened and raised over following segment. 
Head, upper profile arched with rostrum projeeting helm-like and deflexed; 
under part of cheek-lobes strongly projeeting outward and running down into 
a free acute point. Eyes very prominent, large, oval, dark brown. Antenna 1 
little more than '/, as long as body, about twice as long as antenna 2, peduncle 
stouter than that of antenna 2 but equal in length, flagellum 9- or 10-jointed, 
accessory flagellum 2-jointed. Gnathopods 1 and 2, 6*k joint oblong, widening 
a little to the not very oblique palm, larger in gnathopod 1. Peraeopods 3—5, 
2X joint broad, heart-shaped, hind margin with 3 or 4 short spine-like setae. 
Uropod 1 not reaching the end of uropod 3. Uropod 3 '/, as long as body, 
rami subequal, outer with plumose setae only on inner margin, inner ramus 
having them on both margins. Colour dark grey or dark green brown, antennae 
bright, under part of body and peraeopods dark blue or dark violet; a variety 


brightly coloured, side-plates and under body dark blue. L. 10—11 mm. 


Lake Baikal. Depth 20—100 m. 


26. Gen. Baikalogammarus Stebh. 


1899 Baikalogammarus (Sp.typ.: B. pullus), T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 v.7 p. 425. 


Near to Gammarus (p. 460). Pleon segments 4—6 with a few dorsal 
setules or spinules. Antenna 1 the longer, peduncle shorter than peduncle 
of antenna 2, accessory flagellum very short. Gnathopod 1, 6" joint not smaller 
than 6t" joint of gnathopod 2. Peraeopods 3—5, 24 joint broad, the wing 
produced downward in a long rounded lobe. Uropod 3 rather elongate, 
with peduncle as long as the 2-jointed outer ramus. Telson cleft. 


1 species. 


1. B. pullus (Dyb.) 1874 Gammarus p., B. Dybowsky in: Horae Soe. ent. Ross., 
v.10 suppl. p.170 t.11 f.4 | 1898 Atylus? p., A. Della Valle in: F. Fl. Neapel, v.20 
p-930 | 1899 Baikalogammarus p., T.Stebbing in: Tr. Linn. Soe. London, ser.2 0.7 p.425. 


Pleon segments from 24, 34 or 4 to the 6! with 2—4 dorsal setules 
or very fine spines. Head, rostrum slightly deflexed and forming a helm- 
like prominence, post-antennal corners (in figure) rounded. Side-plates 1—4 


with isolated short setae. Eyes large, widened above, black. Antenna 1 


about '/, as long as body, a little longer than antenna 2, 1° joint stout, not 
as long as 22 and 32 combined, flagellum 15 —18-jointed, accessory flagellum 
l-jointed. Antenna 2, ultimate joint of peduncle longer than penultimate, 
curved, flagellum 7—-10-jointed. Gnathopod 1, 6" joint described as piriform, 
but in figure oblorg oval, widening a little to the oblique palm which is 
rather shorter than the hind margin. Gnathopod 2, 6" joint oblong, rather 
smaller than in gnathopod 1. Uropod 1 reaching end of uropod 3. Uropod 2 
only reaching end of pedunele of uropod 3. Uropod 3 '/, (less?) of length 
of body; peduncle as long as outer ramus, which has 24 joint nearly '/, as 
long as 1%; inner ramus ?/, as long as outer; ‚both with plumose setae on 
inner margin. Telson in figure very small, much shorter than pedunele of 
uropod 3. Colour green, spotted with brown. L. 9 6, d 8—9 mm (ineluding 
uropod 3). 


Lake Baikal. Depth 3—10 m. 


TRITT NO 


Parelasmopus, Cheirocratus 417 


27. Gen. Parelasmopus Stebb. 


1888 SERIE (Sp. un.: P. suluensis), T. Stebbing in: Rep. Voy. Challenger, 
2.29 p. 1029. 


Head without rostrum. Antenna 1 the longer, accessory flagellum small. 


Upper lip rounded. Lower lip with inner lobes. Mandible normal except 


as to palp, which is slender and has the 24 joint smaller than either 1% or 34. 
Maxilla 1, inner plate with few setae, outer with 7 spines. Maxilla 2, inner 
plate fringed on distal part of inner margin. Maxillipeds normal, but spine- 
teeth on apex of inner plate uncertain. Gnathopods 1 and 2 subchelate, 
24 with 6'h joint in J very large. Peraeopods 3—5, 24 joint expanded. 


 Uropod 3 not reaching beyond the others (Dana). Telson small, deeply eleft. 


l species. 


-1. P.suluensis (Dana) 1852 Gammarus s., J. D. Dana in: P. Amer. Ac., v2 
p: 210 | 1853 & 55 @.s., J. D. Dana in: U.S. expl. Exp., v. 1311 p. 947; t.65 f.3 | 1862 
Megamoera s., Bate, Cat. Amphip. Brit. Mus., p.230 t.40 f.6 | 1888 Parelasmopus 3., 
T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1029 t. 100. 


Peraeon segment 7 and pleon segments 1 and 2 each with hind 
margin dorsally produced into a pair of teeth, segment 3 dorsally emarginate, 
segment 4 with 2 pairs of upward eurved teeth, segment 6 very short. Head 
with no rostral point, lateral lobes rounded, post-antennal corners acute. 
Side-plates 1—4 moderate in depih, 1° a little distally outdrawn. Pleon 
segments 1—3, postero-lateral corners acute, in segment 3 produced upward, 
with adjacent lower margin serrate in 4 or 5 teeth. Eyes large, oval, close to 


lateral lobes of head. Antenna 1 much the longer, 24 joint rather longer than 1°*, 


34]less than '/, as long as 24, flagellum with more than 17 joints, accessory 
flagellum with 2 slender joints. Antenna 2 slender, gland-cone reaching end of 


. ‚antepenultimate joint, ultimate long, but shorter than penultimate, flagellum 


10-jointed. Mandibular palp not so long as thetrunk, 1° and 34 joints equal, each 
twice or more than twice aslongas 24, 34 slightly tapering. Gnathopod 1, 5% joint 
nearly as long as 6t, 6th oblong, with oblique row of 20 spines on inner 
surface, palm slightly oblique, finely dentieulate. Gnathopod 2 in S, 5% joint 
short, eup-shaped, broader than long, 6% much broader, twice as long as 
broad, with oblique, irregular palm, having a spinose prominence near hinge 
of finger, then 4 emarginations and on either side ofthe last ofthem 2 processes 
of the inner surface adapted to receive the finger-tip. Peraeopods 3 and 4, 
24 joint broader above than below, 4tk moderately broad. Peraeopod 5, 
24 joint oval. Uropods 1—3 reaching equally far (Dana). Telson scarcely 
longer than broad, cleft nearly to base, lobes divergent, each with bidentate 
apex, outer tooth thelonger, 2 unequal spines inserted between the teeth. L. about 
8 mm. 

S00loo Sea (between Cape York and the Arrou Islands). Depth 16 m; among 
sea-weed floating off the shore. 


28. Gen. Cheirocratus Norm. 


1862 Liljeborgia (part.), Bate (& Westwood), Brit. sess. Crust., v.1 p. 202 | 1867 
Cheiroeratus (Sp. un.: (©. mantis), A. M. Norman in: Nat. Hist. Tr. Northumb., v. 1 
p-12 | 1876 C., A. Boeck, Skand. Arkt. Amphip.,' v.2 p.395 | 1893 C., A. Della Valle 
in: F. Fl. Neapel, v.20 p. 687 | 1894 C©., @. O. Sars, Crust. Norway, v.1 p.528. 

Pleon segments 4 and 5 dentate, 4" —6tk armed with bristles. Head 
not rostrate, lateral corners obtusely lobed, post-antennal angles projecting 

Das Tierreich. 21.Lief.: T.R.R. Stebbing, Amphipoda I. 27 


418 Cheirocratus 


just below them. Side-plate 2 the deepest, 4! scarcely emarginate, little 
or not at all deeper than 5t". Eyes small, round. Antenna 1 much the 
shorter, accessory flagellum very small, 2- or 3-jointed. Upper lip rounded. 
Lower lip, inner lobes moderately distinet. Mandible normal, 1° joint of 
palp not very short, 39 shorter than 24. Maxilla 1, inner plate with numerous 
setae. Maxilla 2, inner plate fringed along inner margin. Maxillipeds, palp 
rather short and slender. Mouth-parts in other respects normal. Gnathopods 1 
and 2 inO rather feeble, subequal, 6% joint narrow, without palm. Gnathopod 1 
in d asin O, gnathopod 2 in C powerful, strongly subchelate. Peraeopods 1 
and 2 slight. Peraeopods 3—5 successively longer, 24 joint narrowly oblong. 
Uropod 3 long, rami narrowly lanceolate, subequal. Telson deeply celeft, 
lobes divergent, apically spinose. 


4 species. 


Synopsis of species: 
Peraeopod 5, 4th-—6th joints narrow — 2. 
Peraeopod 5, 4th—6th joints broad — 8. 
Gnathopod 2 ind, palm not marginal, but formed 
2 | by teeth on inner surface of 6th joint. ..... 1. ©. sundevallii . . p.418 
Gnathopod 2 in d, palm marginal, eoncave. . . 2. C.intermedius . p.419 


on inner surface of 6th joint... ..... B) robustus . . . p.419 


Gnathopod 2 in d, palm not marginal, but formed 
3 | .c. 
Gnathopod 2 ind, palm marginal, distal, dentate 4. C. assimilis . . . p.419 


1. C. sundevallii (H. Rathke) 1843 Gammarus s., H. Rathke in: N. Acta 
Ace. Leop., v.201 p.65 t.3 f.2 | 1888 Cheirocratus s., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.204 | 1893 C.s., A. Della Valle in: F. Fl. Neapel, v.20 p. 690 t.20 £.3, 4, 24, 
25, 27,80 | 1876 C. sundevalli, A. Boeck. Skand. Arkt. Amphip., v.2 p.396 t.24 f.2 
(but not 2k) | 1889 C.s.,, A. M. Norman in: Ann. nat. Hist., ser.6 v.4 p.130 t.11 
f£.9, 10; t.12 £.1—3 | 1894 C. sundewalli, G.O.Sars, Orust. Norway, v.1 p.524 t.184; t.185 
f.1 | 1862 Liljeborgia shetlandica, Bate & Westwood, Brit. sess. Crust., v.1 p.206 f. | 
1862 Protomedeia whitei, Bate, Cat. Amphip. Brit. Mus., p.169 t.31 f.2 | 1874 Lilje- 
borgia normanni, '. Stebbing in: Ann. nat. Hist., ser.4 v. 14 p. 10 t.1 £.1 | 1879 
Cheirocratus brevicornis, Hoek in: Tijdschr. Nederl. dierk. Ver., v.4 p. 142 1.10 £.10—13 | 
1884 ©. b., H. Blane in: N. Acta Ace. Leop., 9.47 p.72 t.8 f. 76, 77. 


Body rather slender and compressed, pleon segment 4 produced dorsally 
to 3, segment 5 to 4 teeth, with stiff bristles between them, segment 6 
with 2 bristles. Head, the lateral lobes separated from the triangular post- 
antennal corners by a narrow incision. Side-plate 1 somewhat expanded 
below and angularly produced, 24 deeper in C than in 9, 6!" as deep as 4#, 
Pleon segment 3, postero-lateral corners acutely produced. Eyes reddish 
brown. Antenna 1 shorter than pedunele of antenna 2, 1° and 24 joints sub- 
equal in length, flagellum shorter than peduncle, 12—18-jointed, accessory 
flagellum with 3 (Boeck) or 2 (Sars) joints. Antenna 2 nearly twice as long as 
antenna 1, ultimate joint of peduncle longer than penultimate, flagellum shorter 
than both joints combined, with about 24 joints. Gnathopod 1, 6*% joint rather 
shorter and much narrower than the elongate 5", both densely setose, finger very 
small, denticulate. Gmnathopod 2 in © rather more slender, 6 joint about 
as long as 5tt,. Gmathopod 2 in Cd, 5" joint cup-shaped, much shorter than 
the large, tumid, ovate 6, which is densely setose about hind margin with 
long setae and has a sort of sinuous palm on the inner surface armed by 
3 or 4 irregularly placed denticles, against which the ceurved finger impinges. 
Peraeopods 3—5 in both sexes very slender and long, with slender spines, 


Cheirocratus 419 


the 24 joint distally a little tapering. Uropod 3, peduncle long, more than 
half as long as rami. Telson about °/, as long as peduncle of uropod 3, cleft 
rather wide, ?/, of length, apices obliquely truncate from within outward, armed 
with 3 unequal spines. Colour orange, mottled with rose-red; golden yellow, 
mottled all over with small red specks, an opaque whitish patch on front 
part of peraeon; segments and side-plates spotted with scarlet, margins of 
antennae 1 and 2 and basal joint of legs scarle. L. 8—10 mm. 


Arctie Ocean and North-Atlantie with the adjoining seas (Europe from Lofoten 
Isles round to Naples and Constantinople). Depth 0—112 m. 


2. C. intermedius O.Sars 1894 C.i., G. ©. Sars, Crust. Norway, v.1 p.527 
t.186 £.1 | 1896 ©. i., T. Scott in: Rep. Fish. Board Seotl., v. 14 p. 160 t.4 £.7. 


Closely resembling C. sundevallii. Head, lateral lobes slightly constricted 
at base, post-antennal corners projecting beyond them. Side-plate 1 little 
expanded distally, 24 in d much deeper. Pleon segment 3, postero-lateral 
corners acutely and considerably produced. Antenna 1, flagellum subequal 
to peduncle Gnathopod 2 in J, 6% joint very large, tumid at base, 
palm oblique, - longer than hind margin, concave, densely setose, defined 
by an obtuse prominence with a bifid dentiele and 2 others, having also 2 
distant submarginal dentieles, and near the finger-hinge 2 or 3 prominent 
tubereles, finger curved, shorter than palm and impinging upon its edge, 
not elosing against the surface of the joint. Uropod 3 long, rami little longer 
than peduncle. Telson scarcely longer than broad, cleft wide, apices arımed 
with 5 spines, 1 longer than the rest. Colour pale yellow with irregular 
patches of vivid carmine. L. Q reaching 11 mm. 

North-Atlantie and North-Sea (South- and West-Norway up to the Trond- 
hjemsfjord, in moderate depths; Firth of Forth). 


3. C. robustus O0. Sars 1894 C. r., G. O. Sars, Crust. Norway, v.1 p. 526 
t.185 £.2. 


Very like C. sundevallii. Body comparatively stouter, with side-plates 
smaller, 24 in C only a little deeper than the others, pleon segment 3 with 
postero-lateral eorners rather more produced. Antenna 1 as long as peduncle 
of antenna 2, flagellum longer than peduncle, 22-jointed. Antenna 2, 
ultimate and penultimate joints of peduncle subequal. Gnathopod 1, 6% joint 
as long as 5tb, Gmathopod 2 in J, joints short except 6%, which is very 
large, tumid, ovate, inner face densely clothed with short setae, palm on 
inner surface, slightly concave, armed with 1 tubercle to meet point of 
finger. Peraeopods 3—5 strongly built, especially in JS, peraeopod 5 much the 
strongest, 4 —6th joints broad, compressed, finger small. Telson broader 
than long, 5 not very unequal spines at each apex. Colour pale yellow 
with small red spots. L. © nearly 10 mm. n 


Christianiafjord and Trondhjemsfjord. Moderate depths. 


4. C. assimilis (Lilj.) 1851 Gammarus a., W. Liljeborg in: Öfv. Ak. Förh., 
v.8 p.23 | 1871 Cheirocratus a., A. Boeck in: Forh. Selsk. Christian., 1870 p. 214 | 1876 
C. a., A. Boeck, Skand. Arkt. Amphip, v.2 p.398 t.24 f.3 | 1889 C.a., A. M. Norman 
in: Ann. nat. Hist., ser.6 v.4 p.129 t.10 £.13; t.11 £.11] 1893 C.a., A. Della Valle 
in: F. Fl. Neapel, v.20 p.688 t.20 f.1, 2, 5—23, 26, 28,29 | 1894 C.a.,, G. ©. Sars, 
- Crust. Norway, v.1 p.528 t.186 f.2 | 1867 C. mantis, A. M. Norman in: Nat. Hist. Tr. 
'Northumb., v.1 p.13 t.7 f.14, 15. 


Body as in C. intermedius, post-antennal corners of head even more 
produced, postero-lateral angles of pleon segment 3 rather less. Gnathopod 2 


97* 


420 Cheiroeratus, Megaluropus 


in 8 much elongated, 6!" joint widening distally, with faseicles of spinules 
on both edges, palm much shorter than hind margin, scarcely setose, 
defined by a slender tooth and spine, divided into 3 unequal teeth, and 
minutely trilobed near finger-hinge, finger strong, faleiform, dilated in 
the middle, impinging against palmar tooth.. Peraeopods 3—5 nearly as in 
C. robustus (p. 419), but here peraeopod 5 still longer. Uropod 3, rami rather 
broad, twice as long as peduncle. Telson much broader than long, each of the 
concave apices carıying 3 spines, the central longest. Colour pale yellow, 
mottled with small red spots. Gmathopod 2 in Q, transverse rows of setae of 5th 
joint appear to want the hamate character conspieuous in ©. sundevallii 
(p. 418) (Norman). L. 13 mm. 


Distribution appears to be nearly the same as that of ©. sundevallii (p. 418). 


29. Gen. Megaluropus Hoek 

1889 Megalonoura (Sp. un.: M.agilis) (nom. nud.), (A.M. Norman in MS.) (A. 0. 
Walker in:) Herdman in: P. Liverp. biol. Soe., v.3 p.39 | 1889 Megaluropus (Sp. un.: 
M. agilis) (Megaloura A. M. Norman in MS.), (A. M. Norman in MS.) Hoek in: Tijdschr. 
Nederl. dierk. Ver., ser.2 v.2 p.197, 198 | 1889 Megaluropus, A. M. Norman in: Ann. 
nat. Hist., ser.6 v.3 p.446 | 1889 M., Hoek in: Tijdschr. Nederl. dierk. Ver., ser.2 v2 
p: 260 | 1893 M., A. Della Valle in: F. Fl. Neapel, v.20 p. 694. 

Head with small, acute rostrum and very prominent lateral lobes, on 
which the eyes are placed. Antenna 1 much shorter than antenna 2, accessory 
flagellum very small. Upper lip broad, apically bilobed. Lower lip with 
inner lobes. Mandible, maxillae 1 and 2 and maxillipeds normal. Maxilla 1 
with several setae on inner plate, 11 (?) spines on outer. Maxilla 2, inner 
plate fringed on inner margin. Gmathopod 1 simple; gnathopod 2 larger, 
simple or feebly subchelate. Peraeopod 5 elongate, finger stiliform. Uropod 
3 much produced, rami equal, membranaceous, apically rounded. Telson eleft 
to the base. 


1 species. 


1.M.agilis Hoek 1889 M.a., (A.M. Norman in MS.) Hock in: Tijdschr. Nederl. 
dierk. Ver., ser.2 v.2 p. 197, 260 t.7 1.7; 1.8 £.3, 3d,f,1; t.9 f.3g,h,i,k | 1889 M. a, 
A.M. Norman in: Ann. nat. Hist.. ser. 6 v.3 p.446 t.18 £.1— 10; v.4 p. 128 t. 10 f.15--17 | 
1893 M.a.. A. Della Valle in: F. Fl. Neapel, ©.20 p. 695 t.3 f.9; t.34 f.1—17 | 1895 
M. a., A. O. Walker in: P. Liverp. biol. Soe., ©.9 p.309 | 1890 Cheirocratus drechselii, 
Meinert in: Udb. Hauchs, v.3 p.170 t.2 f. 48—52. 


Pleon segment 3 (and perhaps also 4 and 5) with hind margin dorsally 
serrate. Head, rostrum reaching nearly middle of 1° joint of antenna 1, 
lateral lobes rather broad, abruptly sharpened at apex, reaching much 
beyond rostrum. Side-plate 1 a little widened distally, 24 larger, 34 irregularly 
elliptie, with concave hind margin, 4 largest, scarcely emarginate. Pleon 
segment 3, postero-lateral . corners quadrate, the postero-lateral margin 
serrate, with a eilium between every 2 or 3 teeth. ‚Eyes red, occupying all 
but the apex of lateral lobes of head, and in the J passing upward behind 
base of autenna 1. Antenna 1 rather short, 1° joint not longer, and in C 
rather shorter than 24, 34 joint very short, flagellum 6—-8-jointed, with 
sensory filaments but without calceoli, accessory flagellum 2-jointed. Antenna 
2, ultimate and penultimate joints of pedunele subequal, very long, flagellum 
in © with 8 joints, in C with 16 joints, which are long and slender, without 
calceoli or filaments. Gmathopod 1, 5% joint oblong ovate, broader than 6®h, 
which is of a tapering form, the long palm scarcely distinguished from the 
short hind margin, finger strong, eurved. Gnathopod 2, 5! joint in © longer 


Megaluropus, Melita 421 
taan 6%, widening distally, 6!" joint not more than half as broad, with 
palm nearly asin gnathopod 1, but more defined and rather shorter. Gnathopod 2 
in d, 5tk joint shorter and not much broader than 6%, which is long oval, 
palm ill-defined. Peraeopods land 2, 24 joint bent, distally widened. Peraeopods 
3 and 4, 24 joint wider below than above, 4!" joint wide, longer than any 
of the following joints. Peraeopod 5, 24 joint well expanded, produced behind in 
rounded lobe below the 34 joint, 4— 7!" joints elongate, and except the 4! slender. 
Uropod 1, rami equal, shorter than pedunele. Uropod 2. rami unequal. 
Uropod 3, the broad rami setose in JS. Telson much longer than broad, 
the convex outer margin of each lobe fringed with setules. Colour variegated 
with erimson, orange, and white. L. 4—5 mm. 


 Kattegat; North-Sea (Holland, Firth of Forth); Firth of Clyde; Liverpool Bay; 
English Channel, Bristol Channel (Devon, Jersey); Gulf of Naples. Surface and various 
depths to 36 m. 


30. Gen. Melita Leach 


1813/14 Melita (Sp. un.: M. palmata), Leach in: Edinb. Ene., v.7 p.403 | 1876 
M., A. Boeck, Skand. Arkt. Amphip., ”.2 p. 384 | 1893 M., A. Della Valle in: F. Fl. 
Neapel, v.20 p.707 | 1894 M., G: OÖ Sars, Crust. Norway, e.1 p.507 | 1875 Paramoera 
(part.), Miers in: Ann. nat. Hist.. ser. 4 v.16 p. 75. 


Body slender, peraeon smooth, pleon usually with 1 or more of the 
segments dorsaliy dentate and armed with bristles. Head not rostrate, lateral 
corners rounded. Side-plate 4 the largest, emarginate behind. Eyes usually 
distinet, rather small. Antenna 1 slender, longer than antenna 2, 1° and 24 
joints rather long, 39 not short, with accessory flagellum. Mouth-parts, so far 
as known, normal. Upper lip with small central emargination. Lower lip, 
inner lobes tolerably distinet. Mandibular palp rather slender. Maxilla 1, 
inner plate with several setae, outer with 11 spines. Maxilla 2, inner plate 
sometimes with setae on inner margin. Maxillipeds, outer plates with teeth 
on inner margin, passing into slender spines on apex. Gnathopod 1 small, 
subchelate. Gnathopod 2 larger, often unequal, and one in the d sometimes 
much larger than the other, sometimes approximately chelate. Peraeopods 3—5, 
24 joint well expanded. Peraeopods 4 and 5 subequal, longer than others. 
Branchial vesieles simple. Marsupial plates narrow. Uropod 2 the shortest. 
Uropod 3 projeeting much beyond the others, outer ramus long, 24 joint 
wanting or rudimentary, inner ramus very short. 'Telson small, deeply cleft. 
Some characters subjeet to much variation within the species. 


12 accepted and 7 doubtful speeies. 


Synopsis of accepted species: 


n j Without eyes. ........- N 1:36 pallide: . ;. p. 422 
\ With eyes — 2. 
0 | Eyes searcely pigmented'. -. . ....... 2. M. quadrispinosa . p.422 
Eyes darkly pigmented —- 3. 
3 | Gnathopod 2 in S, one of the pair chelate . 3. M. fresnelü . . . . p.423 
Gnathopod 2 in S subehelate — 4. 
4 [ No pleon segment dorsally dentate — 5. 
| At least 1 pleon segment dorsally dentate — 6. 
5 { Peraeopods 8—5 slender. ....2.... 4. M. nitida ... .. p. 424 
Peraeopods 3—5 rather strongly built... . 5. M. pellueida. . - . p.424 
6 { Pleon segment 4 not dentate.. .... .» . 6. M. coroninii. . . . p.424 
Pleon segment 4 dentate — 7. 


422 Melita 


Pleon segment 4 produced to a single dorsal 


kohle a N 7. M. palmata . . . . p.425 


‘] Pleon segment 4 produced to more than 1 
dorsal tooth — 8. 


8 j Gnathopod 2 in d, finger ending obtusely . . 8. M. obtusata. . . . p.4236 
\ Gnathopod 2 in d, finger ending acutely — 9. 
Q j Pleon segment 3 not dorsally dentate. .. . 9. M. amoena . . . . p.426 


\ Pleon segment 3 dorsally dentate — 10. 
Pleon segmeuts 2 and 3 each with a single 
10 | dorssl Mmothh:.. 20% Den 10. M. formosa . . . . p.427 
| Pleon segments 2 and 3 each with several 
dorsal teeth — 11. 
Teeth ou pleon segments 1--6 ranging from 
| 3 to 11, side-plates 1— 4 shallow . . . . 11. M. dentata ... . . p.427 
| Teeth on pleon segments 1—# usually limited 
to 3, side-plates 1—4 rather deep. . . . 12. M. gladiosa . . . . p.428 


ıl 


1. M. pallida O.Sars 1879 M.p., G. ©. Sars in: Arch. Naturv. Kristian., #4 
p. 457 | 1885 M.p., G. O. Sars in: Norske Nordhavs-Exp.. v.6 Crust. ı p. 179 t.15 f.1, 
la-l | 1893 M.p., A. Della Valle in: F. Fl. Neapel, v.20 p. 716. 


Back rounded, but body greatly 'compressed, pleon segments 1—5 
each produced into a pair of dorsal adpressed teeth, between which 
there are 2—4 smaller dentieles. Side-plates 1-4, lower margin quite 
smooth. Pleon segments 2 and 3, postero-lateral corners acutely produced, 
in segment 3 upward curving. Eyes entirely wanting. Antenna 1 nearly 
as long as body, 24 joint not longer than 1°, flagellum longer than peduncle, 
filiform, 24-jointed, accessory flagellum 3-jointed. Antenna 2 about half as long 
as antenna 1, ultimate and penultimate joints of peduncle equal, flagellum 
11-jointed. Mandibular palp short and slender, 34 joint acute, ending in 
2 simple setae. Maxilla 1, inner plate with numerous setae, outer with 
strong spines, 24 joint of palp slender, curved, with a few delicate spines 
at apex. Maxillipeds, 34 joint of palp distally dilated, setose, finger short, 
conical. Gnathopod 1, 6% joint as long as 5th, abruptly truncate at palm. 
Gnathopod 2, 6% joint large, oval, palm rather oblique, defined by a projecting 
corner, armed with a short spine. Peraeopods 3—5, 24 joint indistinctly serrate 
behind. Uropod 3 the longest, outer ramus more than twice as long as peduncle, 
armed with few spines, rudimentary inner ramus bare. Telson much shorter 
than pedunele of uropod 3, cleft to base, lobes scarcely dehiscent, narrowly 
truncate apices each with a setule. Colour uniform white. L. reaching 26 mm. 


Arctie Ocean (west of Spitzbergen). In cavities (work of Teeredo?) in wood 
dredged from 2510 m. \ 


2. M. quadrispinosa Vosseler 1889 M. q., Vosseler in: Arch. Naturg., o.551 
p. 157 t.8 f.15—24 | 1893 M. palmataQ ?, A. Della Valle in: F. Fl. Neapel, v.20 p. 716. 


Very like M. dentata (p. 427). Pleon segment 4 produced to 1 strong 
dorsal tooth, segment 5 to 3 weaker teeth. Pleon segments 2 and 3, postero- 
lateral corners acutely produced, and in segment 3 upturned. Body slender, 
strongly eompressed. Eyes small, scarcely pigmented. Antenna 1, accessory 
flagellum 3-jointed. Antenna 2, flagellum scarcely longer than penultimate 
joint of peduncle. Mandibular palp thin, with few setae. Maxilla 1 with few 
setae (very numerous in M. dentata) on inner plate. Gnathopod 1, 5" joint 
much longer (in figure) than the oval 6%, which has a palm, though weakly 
defined, 5t" and 6th joints both setose on hind margin. Gnathopod 2, 5% joint 
not short, 6th longer and broader, oval, palm weakly defined, finger eurved, 


Melita 423 


acute, not especially large, and seemingly not closing against surface of 6tk joint. 
Peraeopods 3—5, 24 joint broadly oval. Uropod 3, outer ramus long, inner 
reduced to a small scale, peduncle longer than the telson. L. 11'5 mm. 


Arctic Ocean (Spitzbergen). 


3. M.fresnelii (Aud.) 1826 Gammarus f., Audouin in: Deser. Egypte, v. lıv 
p. 93 Crust. t.11 f£.3 | 1830 Amphithoe f., H. Milne Edwards in: Ann. Sei. nat., v.20 
p- 377 | 1875 Melita f., Paramoera (part.), Miers in: Ann. nat. Hist., ser. 4 v. 16 p.75 | 


‘1893 M.f., A. Della Valle in: F. Fl. Neapel, v.20 p.708 t.60 £.6 ; 1845 Gammarus 


anisochir, Kroyer in: Naturh. Tidsskr., ser.2 v.1 p.817 t.2 f. 1a—p | 1852 @. (Maera) 
validus + @. (M.) pilosus + G. (M.) setipes, J. D. Dana in: P. Amer. Ac., %.2 p.212, 


.213 | 1853 &55 M.valida+ M.s.+ M. anisochir, J. D. Dana in: U. S. expl. Exp., 


v.1311 p.966 t.66 f.6; p.967 t.66 f.7; p.968 1.66 f.8 | 1862 Melita v.+ M.s.+ 
M. a. + M. fresnelli, Bate, Cat. Amphip. Brit. Mus., p.185 t.33 f£.7; p. 186 t.33 f.8; 
p. 186 t.34 f.1; p.186 t.34 f.2 | 1864 M. exilii, Fritz Müller, Für Derain; p-6 f. 1879 
M. australis, Haswell in: P. Linn. Soc. N. S. Wales, v.4 p.264 t.9 £.6, 7 | 1890 M. 
cotesi, G. M. Giles in: J. Asiat. Soc. Bengal, 0.59 p.64 t.2 £.1. 


Peraeon quite smooth. Pleon segment 1, a small median tooth flanked 
on each side by 3 larger teeth and an outer rudimentary tooth; segment 2 
similar, but median tooth comparatively smaller, and outer teeth larger; 
segment 3 with 7 teeth, the outermost on each side furcate; segment 4 with 
5 teeth. 2 large, the middle and outer small; segment 5 with 2 rather long 
teeth. Side-plates I—4 tolerably large, setose on the lower margin, 1° with 


‚dentiecle at lower hind comer. Pleon segment 3, postero-lateral corners 


produced to a long tooth, serrate on its upper margin. Eyes dark, nearly 
eireular. Antenna 1 nearly */, length of body, 1° joint shorter than 24, 
34 scarcely ?/, as long as 24, flagellum much longer than peduncle, 40-jointed, 
accessory flagellum more than '/, of primary, 6-jointed. Antenna 2 a little 
shorter, ultimate joint of pedunele slightly shorter than penultimate, flagellum 
?/, as long as peduncle, about 20-jointed. Mandible, 10 spines in spine-row, palp 
slight, but a little longer than the trunk. Maxilla 1, inner plate with 10 setae. 
Gnathopod 1 small, 6% joint oval, broader than 5t%, both setose, finger short, 


‚pointed, strongly curved, seemingly not very freely movable. Gnathopod 2 


in Q.similar to gnathopod 1, but longer and larger, 6% joint longer but 
not proportionatelvy broader, palm and inner margin of finger finely denti- 
culate (as seen in M. australis Haswell). Gnathopod 2 in J, the right limb 
nearly as in O, the left quite different, 24 joint rather dilated, 4" produced 
to a backward-directed point, 5t% very small, 6!" and finger forming a sort 
of &hela; the 6% joint, instead of being shorter than 24, is more than twice 


‚as long, and of great breadth, its hind margin longer than the front, produced 


to a great spoon-shaped tooth, between which and the finger-hinge are 3 teeth 
or tubereles, the finger long, massive, slightly sinnous and apically blunt. 
Peraeopod 1 rather longer than peraeopod 2. Peraeopods 3—5, 24 joint 
minutely serrate behind. Peraeopod 4 slightly longer than peraeopod 5. 
Uropod 1, rami about equal to pedunele and one to other. Uropod 2, rami 
rather longer than peduncle. Uropod.3, outer ramus nearly twice as lung 
as peduncle. inner ramus small, almost linear. Telson cleft nearly to base, 
lobes conical, widely dehiscent, apices curved a little inward. Colour elouded 
yellowish grey, thumb of chela porcelain-white. L. about 13 mm. (Diagnosis 
taken especially from Kroyer’s account). 

Red Sea? (Egypt); Atlantic (Rio Janeiro, depth 11—13 m; Desterro); Indian 
Ocean (Andaman Islands, shallow water; Singapore, depth 3 m); Port Jackson [East- 
Australia]. 


a 


. 424 Melita 


4. M.nitida S.I.Sm. 1873 M. n., (S. I. Smith in:) A. E. Verrill in: Rep. U. 
S. Fish Comm.,. v.1 p.560 | 1893 M.n., A. Della Valle in: F. Fl. Neapel, v.20 p. 716. 

Pleon segments 1—6, none serrate or emarginate, segment 5 with & 
several slender spines on each side near median dorsal line. Eyes small, 
round, black. Antenna 1 about °/, as long as body, 24 joint slightly longer 
than 1°, nearly twice as long as 34, flagellum longer than peduncle. Antenna 2 
shorter, but with longer peduncle, ultimate joint of pedunele rather longer 
than penultimate. Gnathopod 1, 5t% joint longer and broader than 6%", which 
is oblong, slightly curved, finger very small but stout, curved, attached in noteh of 
apex of 6 joint, not elosing on palm but projecting inwards. Gnathopod 2 stout, 
5th joint short, triangular, 6% somewhat oval, palm oblique, arcuate, conti- 
nuous with hind margin, with spinules and stiff hairs, tip of finger resting 
within the palmary margin. Peraeopod 1 rather longer than peraeopod 2. 
Peraeopods 3—5, 24 joint minutely serrate behind. Uropod 2 not reaching 
quite so far as uropod 1. Uropod 3 very long, with fascieles of spines 
along the margins. Lobes of telson slender, with spines at the tips. Colour 
dark greenish-slatee L. 7--9 mm. 

North-Atlantie (New Jersey to Cape Cod). Near low-water mark. 

5. M. pellucida O. Sars 1882 M.p.,. G. O. Sars in: Forh. Selsk. Christian., 
nr. 18 p.106 t.5 £.9, 9a, b ! 1894 M.p., G. O. Sars, Crust. Norway, v.1 p.511 t.180 f. 2. 

Body rather slender, with no dorsal teeth, but some simple bristles on 
pleon segments 4 and 5. Head, lateral corners broadly rounded, post- 
antennal corners to the rear but distinet. Side-plate 1 expanded distally, 
4!h quadrate below the emargination. Pleon segment 3, postero-lateral 
corners acute, but scarcely produced. Eyes small, rounded oval, black. 
Antenna 1 about °/, as long as body, 1° joint fully as long as 24, 34 more 
than half as long as 24, flagellum nearly twice as long as peduncle, 18-jointed, 
accessory flagellum very small, 1-jointed. Antenna 2 scarcely more than '/, 
as long as antenna 1, ultimate and penultimate joints of peduncle subequal, 
together longer than flagellum. Gmathopod 1, 6! joint little more than 
!/, as long as 5, subquadrate, palm distinetly defined, transverse. Gmatho- 
pod 2 in © larger, 6! joint a little longer than 5" and broader, oval, 
but with palm nearly transverse, defined by a distinet angle and 2 palmar 
spines, in © similar, but with 5tk joint shorter, and 6" considerably larger. 
Peraeopods 3—5 rather strongly built, 24 joint rather broadly oval. Uropod 3, 
peduncle about '/, as long as outer ramus, which has apex obliquely truncate, 
armed with many unequal spines, inner ramus not twice as long as broad. 
Telson broader than long, not cleft to the base, the dehiscent lobes obtusely 
rounded, with several apical spines. Colour whitish, pellueid. L. © 6 mm, 
Q considerably less. 

South-Norway (brackish basin inside the Listerland). Ä 

6. M. coroninii Heller 1866 M.c., Cam. Heller in: Denk. Ak. Wien, v.26n 
p-37 t.3 f£.20, 21 | 1893 M. palmata (part.) A. Della Valle in: F. Fl. Neapel, v.20 p.714. 

Pleon segments 1—4 entirely unarmed, segment 5 produced into 3 
dorsal denticles with a bristle in each of the intervals ‘(the figured small 
7th segment is an error). Eyes small, round, black. Antenna 1 almost as 
long as body, 24 joint longer than 1°, flagellum of more than 40 joints, 
accessory flagellum of 4 rather elongate, joints. Antenna 2 shorter, flagellum 
much shorter than peduncle, about 20-jointed. Gmathopod 1, 6! joint 
shorter than 5%, narrow proximally, distally a little widened, palm short, 
defined by a projeeting rounded lobe, behind which the point of the finger 
closes down. Gmathopod 2, 6! joint in J rather tumid, oval, palm weakly 


Melita 425 


defined, finger strongly curved, closing - against inner surface of 6% joint. 
Peraeopods 1 and 2 slender. Peraeopods 3—5 stouter, 24 joint oval, pretty 
well expanded. Uropods 1—3 as usual in the genus. Telson with lobes 
about reaching end of peduncle of uropod 3. L. 10—11 mm. 

Adriatie (Lesina). 

7. M. palmata (Mont) 1804 Cancer palmatus, Montagu in: Tr. Linn. Soc. 
London, 0.7 p.69 t.6 f.4 | 1812 Astacus p., Pennant, Brit. Zool., ed.ö v.4 p.35 | 
1813/14 Melita palmata, M. palmeta, Leach in: Edinb. Ene., 0.7 p.408, 432 | 1876 
M. palmata, A. Boeck, Skand. Arkt. Amphip., v.2 p. 387 t.24 f.4 | 1878 M.p., Zaddach 
in: Schr. Ges. Königsb., v.19 Abh. p.52 f.4 ! 1889 M.p., A.M. Norman in: Ann. nat. 
Hist., ser.6 v.4 p.132 | 1893 M. p. (part.), A. Della Valle in: F. Fl. Neapel, ».20 p. 713 
t.1 £.6; t.23 f.24—40 | 1894 M.p., G. O. Sars, Crust. Norway, v.1 p.508 t.179 | 1818 
Gammarus palmatus, Lamarck, Hist. An.s. Vert., ©.5 p.181 | 1830 @. dugesü, H. Milne 
Edwards in: Ann. Sei. nat., v.20 p.368 | 1857 0. inaequimanus,. Bate in: Ann. nat. 
Hist., ser.2 v.19 p. 145. e 

Pleon segment 4 produced dorsally to a compressed tooth, segment 5 
»to 2 small contiguous dentieles, each with a bristle at the base. Head, a 
small rounded projeetion in the rostfal position, post-antennal corners 
separated by a small ineision from the lateral corners. Side-plate 6 in © (not 
in C, as Boeck asserted) having the front lobe produced below to a spiral process. 
Pleon segment 3, postero-lateral corners slightly produced, acute. Eyes very 
small, roundish, dark brownish. Antenna 1 more than '/, as long as body, 
22 joint rather longer than 1°, 34 about half 24 or less, flagellum longer 
than peduncle, 20-jointed, accessory flagellum 2-jointed. Antenna 2 much 
shorter, ultimate and penultimate joints of pedunele subequal, flagellum short, 
sometimes with 10 joints. Maxillipeds, 34 joint of palp distally widened, 
finger with setules on inner margin. Gmnathopod 1 very small, 6th joint 
much shorter than 5%, widening distally, palm transverse; (Sars: finger in 
oO well defined, in C obtuse and immovable; but Zaddach and others: sth 
joint in J on its front border deeply emarginate and so obliquely that the 
emargination is larger on the inner than on the outer side, whereby arises 
an upper and an under process, the finger being placed in the emargination 
on the outer surface, and moving so obliquely that in repose it rests on the 
inner side of the under process, its place of insertion being protected by a 
chitinous process on each side). The finger ends in an acute hook. Gnatho- 
pod 2 large in Q, 5!" joint expanded distally to a broad setiferous lobe, 
6th broad, ovately oblong, palm rather oblique, with a few spines at the 
obtuse angle; in 3 very large, 5t% joint short, eup-shaped, 6!" much expanded, 
widest at palm which is somewhat variable, sometimes where it meets hind 
margin much projecting and rounded off (Sars), at others, slightly oblique 
and angular, with a strong group of setae on the adjoining surface, finger 
eurved, acute, folding down on to the inner concave surface of 6 joint. 
Peraeopods 3—5 much stouter than peraeopods 1 and 2, 24 joint broadly oval, 
very slightly serrate, peraeopods 4 and 5 much longer than 34, terminal 
joints overturned baekward. Finger in maxillipeds and all the limbs ending in 
a nail, finger short in peraeopods 1—5. Uropods 1—3 of the usual character, 
Telson about reaching end of pedunele of uropod 3, with lobes rather narrow, 
widely divergent, each carrying 4 spinules on truncate apex, and 3 stronger 
spines on projection of inner margin (Sars); divided to the base, each lobe 
very acute, with slight indent on the outer margin (Della Valle). Colour 
pale brownish yellow. L. 8—16 mm. 

North-Atlantie with the adjoining seas (Europa: Great Britain, West-Norway, 
Baltie ete.; Azores). 


426 Melita 


8. M. obtusata (Mont.) 1813 Cancer (Gammarus) obtusatus, Montagu in: Tr. 
Linn. Soe. London, v.11 p.5 t.2 £.7 | 1818[?] @. o., Latreille in: Tabl. ene. meth., 
Crust. Arach. Ins. t.336 f,29 | 1830 Amphithoe obtusata, H. Milne Edwards in: Ann. 
Sei. nat., v.20 p.877 | 1879 Melita o., Hoek in: Tijdschr. Neder!. dierk. Ver., v.4 p. 140 
t.10 f.8, 9 | 1889 M.o., A.M. Norman in: Ann. nat. Hist., ser.6 v.4 p.132 | 1893 
M. o. (part.). A. Della Valle in: F. Fl. Neapel, v.20 p.711 t.1 £.7; 1.23 £.1—19; & ?juv. 
p. 713 t.3 f.14; t.23 f.20—23 | 1894 M.o., G.O.Sars, Crust. Norway, v.1 p.510 t. 180 
f.1 | 1852 Gammarus maculatus (non G. Johnston 1827!), W. Liljeborg in: Öfv. Ak. 
Förh., c.9 p.10 | 1853 @. obtusunguis, A. Costa in: Rend. Soc. Borbon., n. ser. v.2 p.176 | 
1862 Melita obtusata + M. proxima + Megamoera alderi, Bate, Cat. Amphip. Brit. 
Mus., p.183 t.33 f.3; p.184 t.33 f.4; p.228 t.40 f. 1. 


Pleon segments produced to variable number of teeth. Head, lateral 
corners broadly rounded, post-antennal corners forming a minute tooth. 
Side-plates 1—4 rather deep, 1% a little widened distally, 1°:—34 with den- 
ticle at lower hind corner. Pleon segment 3, postero-lateral angles much 
produced, acute, upturned, margins smooth or slightly serrate. Eyes small, 
round, dark. Antenna 1 more than \, as long as body, 24 joint rather 


longer than 1°*, flagellum longer than peduncle, flagellum about 16-jointed. 


(Sars), accessory flagellum 4-jointed, last joint minute. Antenna 2, ultimate joint 
of pedunele rather shorter than penultimate, flagellum subequal to both com- 
bined. Mandibular palp very narrow, joints successively longer. Gnathopod 1, 
6 joint as long as 5%, rather broad, somewhat triangular, palm oblique, 
ill-defined. Gnathopod 2 larger in Q, 6 joint longer than 5th, oblong oval, 
palm rather oblique, defined by an obtuse angle; in J 5!" joint short, 
cup-like, 6!" very large, tumid, widest at palm, which is irregularly serrated, 
and hollowed near the triangular defining lobe; finger, which eloses into the 
cavity, is scimitar-shaped, its obtuse apex rounded above and squared below; 
(Bate: palm sometimes less sinuous and more irregularly denticulate). Peraeo- 
pods 3—5, 24 joint oval, hind margin distinetly serrate. Uropod 3, outer ramus 
ending in a strong spine, which perhaps represents a 24 joint, about once 
and a half as long as peduncle, inner ramus very small. Telson not nearly 
reaching end of peduncle of uropod 3, eleft nearly to base, lobes dehiscent, 
acute, with some spinules on inner margin. Colour pale brown, mottled with 
rufous brown, especially about the legs (Montagu). L. 6—9 mm. 
North-Atlantie.with the adjoining seas (from West-Norway round Europe to Italy). 


9. M. amoena H. J. Hansen 1887 M.a., H. J. Hansen in: Vid. Meddel., ser. 4 
e.9 p.147 t.6 f.1, la | 1898 M. obtusata (part.), A. Della Valle in: F. Fl. Neapel, 
2.20 p. 711. 

d. Body somewhat compressed, pleon segment 1 with 1 very little 
dorsal tooth, segment 2 with 5, middle small, other 4 very minute, segment 3 
unarmed, segment 4 with 2 rather small teeth, segment 5 with 2 minute 
teeth. Head, post-antennal corners not dentiform. Side-plates 1—4, lower 
margin broadly rounded, 18t the smallest. Pleon segment 2, postero-lateral 
corners produced to a process rather long, narrow, obtuse, corners of seg- 
ment 3 acute, upturned. Eyes small, round. Antenna 1 about ’/, as long 
as body, 1° joint rather shorter than 24, flagellum shorter than peduncle, 
accessory flagellum 4-jointed, last joint minute. Antenna 2, ultimate and penulti- 
mate joints of peduncle subequal. Gmnathopod 1, 6% joint shorter than 5th, 
much longer than broad, palm very oblique. Gnathopod 2, 5th joint very 
short, cup-shaped, 6! very large, about twice as long as broad, palm very 
oblique, longer than hind margin, irregularly dentate, finger long, the acute 
apex elosing behind the little triangular lobe which defines the palm. Peraeo- 
pods 3—5, 24 joint much expanded, in peraeopods 4 and 5 not '/, longer than 


Kr an in ra N rt Kan 


BE a ee rk 


Melita 427 


broad. Uropod 3, outer ramus not quite twice as long as peduncle, inner 
very minute. Colour whitish. L. 8:5 mm. 


Ikertokfjord [West-Greenland|. Depth 56 m. 


10. M. formosa J. Murdoch 1866 Gammarus dentatus (part.), Goes in: Öfr. 
Ak. Förh., v.22 p.530 t.40 f.29° | 1885 Melita formosa, J. Murdoch in: P. U. S. Mus., 
v.7 p.520 | 1887 M. goösii, H. J. Hansen in: Dijmphna Udb., p. 228 t.21 f.13 | 1887 
M.g., H.J Hansen in: Vid. Meddel., ser.4 v.9 p.146 t.5 f.8 | 1893 M. obtusata (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 711. z 

Close to M. dentata. Pleon segments 2 and 3 produced each to 1 
dorsal tooth, segment 4 to 3 teeth, segment 5 to 4, all very small. Pleon 
segments 1—3, postero-lateral corners acute, in segment 3 produced upward. 
Antenna 1, 1° joint not quite so long as 24. Gnathopod 1, 6% joint oval, 
fringed with long hairs on hind margin. Gnathopod 2, 6!" joint in JS broadly 
oval, armed on the hind margin with 3 or 4 blunt teeth and running out 
into a broad blunt tooth, palm minutely denticulate, finger large, curved, 
acute, shutting on the inside of the palm. Uropod 3, inner ramus ovate. 
Colour purple, with lighter streak down middle of back (Murdoch). Hansen 
adds: body depressed, lateral corners of head produced into a long, acute 
process; side-plates 1—4 shallow; peraeopods 3—5, 24 joint long and 
narrow, with front and hind margins subparallel; uropod 3, outer (not inner!) 
ramus very long; colour red. L. 17':5—21 mm. 

. Arectie Ocean (arctic Alaska; Jugor Schar, depth 19—23 m; Veoskrlitechlend, 

depth 66 m; Spitzbergen, depth 19—75 m). 


11. M. dentata (Kroyer) 1842 Gammarus dentatus, Kroyer in: Naturh. Tidsskr., 
v.4 p.159 | 1866 @. d. (part.), Goes-in: Öfv. Ak. Förh., 0.22 p.530 t.40 f.29 | 1862 
Megamoera dentata, Bate, Cat. Amphip. Brit. Mus., p.225 t.39 f.4 | 1871 Melita d., 
A. Boeck in: Forh. Selsk. Christian., 1870 p.211 | 1876 M.d.(part.), A. Boeck, Skand. Arkt. 
Amphip., v.2 p.389 t.23 f.10 | 1884 M.d., J.S. Schneider in: Tromss Mus. Aarsh., v.7 
p-113 | 1889 M.d., A.M. Norman iin: Ann. nat. Hist.. ser. 6 v.4 p.135 | 1894 M. d. (part.), 
G.O.Sars, Crust. Norway, v.1 p.513 t. 181 f.1 | 1853 Gammarus purpuratus, Stimpson 
in: Smithson. Contr.; v.6 nr.5 p.55 |, 1893 Melita palmata (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 713. 


Elongate, eompressed, but with rounded back. Pleon segments 1—6 
produced dorsally to several teeth, of which median usually the largest, 
numbers very variable. Head, post-antennal corners short, dentiform. Side- 
plates 1—4 shallow, 1° scarcely expanded distally, 1:—34 with lower hind 
corner dentiform. Pleon segment 3, postero-lateral corners acutely produced, 
slightly upturned. Eyes small, rounded oval, black. Antenna 1 nearly as long 
as body, 1° joint with spines on lower margin, a long one at apex, 24 joint 
longer, 34 about '/,—", of 24; flagellum longer than peduncle, 36—46- 
jointed, accessory flagellum 4—9-jointed. Antenna 2, peduncle long, ultimate 
and penultimate joints subequal, flagellum short, about 13-jointed. Mandibular 


. palp rather slender, 1° joint produced to a dentiform projection, 3% and 24 


subequal, or 32 the longer. Maxilla 1, outer plate. witlı 7—9(?) spines. 
Gnathopod 1 densely setose, 6!" joint (Sars) about aslong as 5", oblong oval, palm 
rather oblique, defined by an obtuse angle; (Norman: 6% joint ovate, much shorter 
than 5%, palm defined by a small tooth-like process, very minutely erenulated 
and spinulose, finger faleate, its inner margin divided up into minute teeth 
of peeuliar form, widening in the middle and apieulate). Gnathopod 2 much 
stronger, 5% joint rather short, 6tk rather large, especially in C, oblong, 
a little widening to the oblique slightly denticulated palm, which is defined 
by a tooth-like process, and in C is angular near the finger-hinge, finger 


428 Melita 


large, curved, acute. Peraeopods 1 and 2 slender,; short. Peraeopods 3—5 


successively longer, 24 joint large, oblong oval, hind margin serrate, with 
the lower hind corners rounded or subangular. Uropod 3, outer ramus very long, 
sublinear, fully twice as long as peduncle, ending in 4 spines, the largest per haps 
representing a 24 joint, inner ramus very small. Telson not nearly reaching 
end of peduncle of uropod 3, lobes acute, each with 2 spines inside the point, 
1 setule outside. Colour varying with the surroundings (Schneider); uniform 
dark purple, never varying (Stimpson). L. 11—22(—27°5?) mm. 

Arctic and Seandinavian waters; North-Atlantice (Halifax [Nova Scotia], Labrador, 
Grand Manan, Northumberland). Down to 113 m. 


12. M. gladiosa Bate 1862 M.g., Bate (& Westwood), Brit. sess. Crust., v. 1 
p.846 f. | 1862 M. g., Bate, Cat. Amphip. Brit. Mus., p.185 t.33 f.6 | 1876 M. g,, 
T. Stebbing in: Ann. nat. Hist., ser. 4 o.17 p.77 t.4 f.2, 2a—d | 1889 M.g., A.M. 
Norman in: Ann. nat. Hist., ser.6 v.4 p.134 | 1893 M. obtusata (part.). A. Della Valle 
in: F. Fl. Neapel, v.20 p.711. 


Near to M. obtusata (p. 426). Pleon segments 1—6 each with 3 dorsal teeth, 
but sometimes segments 1, 5 and 6 with more or fewer, or 1° with none; teeth 
large on segments 1—4, except central of segment 4, teeth on segment 6 very 
small. Pleon segment 3, postero-lateral corners acutely produced, upturned, 
their upper and under margins serrate. Gmathopod 1, 5! and 6% joints 
equal and similar, broadly oval, palm scarcely defined, hind margin of 
4 — 6" joints with dense fringe of fine short hairs, as in M. obtusata O. 
Gmathopod 2 in 9 without the fur seen in gnathopod 1, not much larger, 5t" joint 
less broad, 6! equal in breadth but longer, palm defined by a "small tooth. 
Gnathopod 2 in S much larger, 5" joint short, cup-shaped, 6" large, broad, 
palm serrate, strongly sinuous, with an abrupt eurve at the middle, finger 
scimitar-shaped, broad almost to the end, but with an acute apex. 

North-Atlantie (South-West-England: North-East-Seotland; Boulugne and West- 
France; Azores). 


M. appendiculata (Say) 1818 Gammarus appendiculatus, Say in: J. Ac. Philad., 
v.111 p.374|1845 @.a., Kreyerin: Naturh. Tidsskr., ser.2 v.1 p.326 | 1862 @. a., Podocerus 
(part.)?, Bate, Cat. Ampkip: Brit. Mus., p.223, 224 | 1888 Maera? a., T. Stebbing in: 
Rep. Voy. Challenger, v.29 p. 103 | 1893 Cerarloeus?.a., A. Della Valle ; in: F. Fl. Neapel, 
v.20 p. 765. 

Peraeon segments 5—7 and pleon segments dentated on their Basler edges. 
L..7—8 mm. 


* United States of America (Georgia). 


M. confervicola (Stimps.) 1857 Maera e., Stimpson in: P. Calif. Ae., v.1 p.99 | 
1857 Gammarus confervicolus, Stimpson in: Boston J. nat. Hist., ©.6 p.520 | 1862 @. e., 
Bate, Cat. Amphip. Brit. Mus., p.218 t.38 f.9 | 1899 Melita e., TV. Stebbing in: Tr. Linn, 
Soe. London, ser.2 v.7:p.425 | 1898 Gammarus marinus (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 762. 


L. 12-5 mm. ’ 
North-Paecifie (San Franeisco, among confervae in salt marshes; Pugets Sound). 
M. gayi (Nie.) 1849 Amphitoe g., H. Nicolet in: Gay, Hist. Chile, v.3 p.236, 


Crust. t.2 f.6a,b | 1893 Amphithoe g., A. Della Valle in: F. Fl. Neapel, v.20 p.463 | 
1899 Melita g., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v©.7 p. 425. 


Side-plate 5 much shorter than 4th, 6th deeply emarginate so that the anterior 
lobe takes the form of a horn much eurved backward (eompare M.palmata 9, p. 425). 
L. about 9 mm. 


South Paeifie (off Chili). 


en . 


3 
2 
i 
F; 
4 
i 


Melita, Paraceradocus 429 


M. inaequistylis (Dana) 1852 Amphitoe (Melita) i.(2) + 4A. (M.) tenuicornis 


part.: 8), J. D. Dana in: P. Amer. Ac., v.2 p.214; p.215 | 1853 & 55 M.t., J.D. Dana 


in: U. S. expl. Exp., e. 1311 p. 963 t.66 f.5a—m | 1881 M. t., G. M. Thomson in: Tr. N. 


‚Zealand Inst., «.13 p.218 | 1862 Moera t., Bate, Cat. Amphip. Brit. Mus., p:195 t.35 


f.6 | 1875 Paramoera t., Miers in: Ann. nat. Hist., ser.4 v.16 p.75 | 1876. P. t., Miers, 
Cat. Crust. N. Zealand, p.127 t.3 £.8 (2) | 1893 Melita palmata (part.).. A. Della Valle 
in: F. Fl. Neapel, v.20 p. 714. 

Dana’s and Thomson’s statements are in many respeets contradietory; whether 2 
and 8 belong to the same species, is doubtful. # 


South-Paeifie (New Zealand). Between tidemarks and in rock pools along eoast. 


M. oxyura Catta 1875 M. o., Catta in: Rev. Sei. nat., .4 p.164 ! 1893 M. o., 
A. Della Valle in: F. Fl. Neapel, v.20 p. 716. 


Rather near to M. gladiosa; specially distinguished by the RER dentation of 
the lower hind margin of pleon segments. 


Gulf of Lyon (Marseille). Among Zostera, depth 19—25 m. 


M. sp., F. Brandt 1851 Gammarus longicauda (non A. Costa 1851!), F. Brandt 
in: Middendorff, Reise Sibirien, v.21 p.141 t.6 f.32 | 1862 Megamoera l., Bate, Cat. 
Amphip. Brit. Mus., p.229 t.40 f£.3 | 18938 Maera? l., A. Della Valle in: F. Fi. Neapel, 
v.20 p.730 | 1876 Melita dentata (part.), A. Boeck, Skand. Arkt. Amphip., v.2 p.392 | 
1894 M.d. (part.), G. O. Sars, Crust. Norway, v.1 p.514. 

Perhaps identical with M. dentata (p. 427). 


Sea of Ochotsk. 


M.sp., Stimps. ?1852 Amphithoe tenwicornis (part.) (err., non Amphithoe t. 
Rathke 1843)), J. D. Dana in: P. Amer. Ac., ©.2 p.214 | 1855 Gammarus t. (sp. nov.!), 
Stimpson in: P. Ac. Philad.. v.7 p.382 | 1899 Melita t., T. Stebbing in: Tr. Linn. Soc. 
London, ser.2 v.7 p.425. 

L. 8 mm. 


North-Paeifie (Loo Choo Islands). 


31. Gen. Paraceradocus Stebb. 


1899 Paraceradocus (Sp. typ.: P. miersii), T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 v.7 p.426. 


Side-plates not deep, 1° larger than 4". Antenna 1 longer than antenna 2, 
but not stouter and with shorter peduncle. Upper lip transversely elliptie. 
Lower lip with prineipal lobes dehiscent. Mandibular palp long, 34 joint not 
short. Maxilla 1, inner plate large, with setae only on the apex, palp broad. 
Maxilla 2, inner plate fringed on inner margin. Peraeopod 1, uropods and 
telson as in Ceradocus (p. 430). 


1 species. 


pr 


1. P. miersii (Pieff.) 1888 Megamoera m., Pfeffer in: Jahrb. Hamburg. Anst., 
0.5 p.121 t.3 f.3 | 1893 Maera? m., A. Della Valle in: F. Fl. Neapel, v.20 p. 732 | 1899 
Paraceradocus m., T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p. 426. 


Body elongate, back rounded as far as peraeon segment 6, segment 7 
and pleon segments 1—5 with dorsal angle, on segments 4—5 raised into 
a carina produced acutely backward, pleon segment 6 dorsally flat. Head, 
lateral lobes a little Dee, narrowly rounded, post-antennal corners 
not acute. Side-plates 1 and 2 rather shallow, larger than 34 and 4th, 4th 
not deeper than 5t%,. Pleon segment 3, postero-lateral corners strongly 


En fr ae 9 Mac een Se 
BER TE RENTE 


430 Paraceradocus, Ceradocus 


produced backward, acute, with slight upward curve. - Eyes narrowly oval. 
Antenna 1 about half as long as body, 1° joint long and stout, 24 thinner 


and rather shorter, 39 small, flagellum rather longer than peduncle, 50-jointed, 


accessory flagellum about 7-jointed. Antenna 2 very strong, gland-cone 
short, antepenultimate joint of peduncle very stout, penultimate and ultimate 
joints of peduncle corresponding in thickness and length respectively to 
1% and 24 joints of antenna 1, flagellum stout, as long as ultimate joint of 
peduncle, about 17-jointed. Gmathopod 1, 5! joint rather longer than 6th, 
6th oblong, a little widened distally, palm nearly transverse. Gnathopod 2 
much larger, 5% joint broad, cup-shaped, 6!" large, subquadrate, a little 
widened distally, palm transverse, sinuous, defined by a short strong tooth, 
not quite reached by the finger-point. Peraeopods 1 and 2 not very strong. 
Peraeopods 3 —5 successively longer, robust, spinose, 24 joint well expanded, 
but narrowing somewhat downward. Uropods 1—3 stout, in 1° and 24 outer 
ramus rather shorter than inner, 1° not reaching so far back as 24, 24 Jittle 
beyond pedunele of uropod 3. Uropod 3, peduncle short, rami forming 
long narrow laminae, in 0 of quite exceptional size, slightly widening to 
rounded apices, in Q narrowly elliptic, inner ramus in q scarcely, in Q con- 
siderably longer and somewhat broader than the outer. Telson cleft nearly 


to base, breadth at base equal to °/, of length, lobes conical, divergent. 


Colour orange-red. L. © 35—38, 5 46 mm. 
South-Atlantie (South Georgia). Low-tide. 


32. Gen. Ceradocus A. Costa 


1853 Ceradocus (Sp. un.: ©. orchestiipes), A. Costa in: Rend. Soc. Borbon., n. ser. 
v.2 p.170 | 1893 C. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.718 | 1862 Mega- 
moera (part.), Bate (& Westwood), Brit. sess. Crust., v.1 p.400 | 1862 Megamaera, Bate, 
Cat. Amphip. Brit. Mus., t. 39. 


Head without conspieuous rostrum. Side-plates shallow, 4! not deeper 
than 5t%, nor excavate behind. Antenna 1 the longer and stouter, accessory 
flagellum well developed. Antenna 2, flagellum short. Upper lip with rounded 
margin. Lower lip with inner lobes. Mandible, 3% joint of palp straight, 
much shorter than 24. Maxilla 1, ipner plate large, subacute above, margin 
fringed with numerous setae, outer plate with 9 or more spines. Maxilla 2, 
inner plate fringed along inner margin. Maxillipeds, gnathopods 1 and 2, 
peraeopods 1—5, uropods 1 and 2 and telson as in Maera (p. 433); uropod 3 
with rami greatly developed. 


4 species. 
Synopsis of species: 
1 Some segments dorsally dentate . ...... 1. ©. rubromaculatus . p. 450 
No segments dorsally dentate — 2. 
Side-plates 1—4 with tooth at lower hind eorner 2. C. semiserratus ....p.431 


2 2 Side-plates 1—4 without tooth at lower hind 

corner — 8. 
Pleon segment 3, postero-lateral corners denti- 

Dinbe ve  e e , 3. C. orchestiipes. . . p. 432 
Pleon segment 3, postero-lateral corners forming 


a simple N ES N AR 4.0. t0relHr 2.30 4: 9; 488 


3 


1. C. rubromaculatus (Stimps.) 1855 Gammarus rubro-maculatus, Stimpson 
in: P. Ac. Philad., v.7 p.394 | 1885 Moera rubromaculata, Haswell in: P. Linn. Soc. 
N.S. Wales, e.10 p.105 t.15 f.5—12 | 1888 Maera r., T. Stebbing in:. Rep. Voy. 


wi 2 nr ’ ’ 3 


Ed ar N a a a 
Fr 1 f d 


1 
2 


| 


$ 
A 


PO AT) ad man al Frage u De ame s 
Y r +” D e 


, 


a a a 
“ 6 


Ceradocus 431 


Challenger, v.29 p.1008 t. 95, 96 | 1893 Ceradocus rubromaculatus, A. Della-Valle in: 
F. Fl. Neapel, v.20 p.720 | 1899 C.r., T. Stebbing in: Tr. Linn. Soe. London, ser. 2 
v.7 p.426 | 1862 Megamoera serrata, Bate, Cat. Amphip. Brit. Mus., p.226 t.39 f.5| 
1879 Melita? ramsayi + Moera rubro-maculata + M. spinosa + M. ramsayi, Haswell 
in: P. Linn. Soe. N.S. Wales, v.4 p.246 t.10 £.1; p.267 t.10 £.4; p.268 t.10 £.5; 
p- 334 | 1885 Moera festiva, Chilton in: P. Linn. Soc. N. S. Wales, v.9 p.1037 t.46 f.2. 


Pleon segments 1—6 dorsally serrate, with setules in the serrations, 
segment 1 with 15 teeth, 24 with 17, 34 with 15, 4!" with 9, 5t" with 7, 6th with 3, 


- central most prominent, especially in segments 3 and 4, but this ornamentation 


is very variable. Head, lateral lobes nasiform, post-antennal corners 
acute. Side-plates 1—4 shallow, not deeper than 5%, 1° a little outdrawn, 
acute, 24 —4th subquadrate: with rounded angles.. Pleon segments 1—3, 


. postero-lateral corners acute, in segments 1 and 2 and sometimes in 3 lower 


margin a little serrate, and in segment 3 hind margin of the cormer serrate. 
Eyes dark, oval, elose to margin of lateral lobes of head. Antenna 1 half as 
long as body, 24 joint more slender than 1%, but as long or a little longer, 
34 about !/), as long as 24, flagellum shorter than peduncle, 10— 33-jointed, 
accessory flagellum also variable, 4+—12-jointed. Antenna 2, gland-cone nearly 
reaching end of long antepenultimate joint of peduncle, this and ultimate joint 
much shorter than penultimate, flagellum short, with 18 joints (to match 33 
in flagellum of antenna 1). Upper lip with almost semicircular margin. 
Lower lip, prineipal lobes dehiscent, with little quadrate corner at top of 
inner margin. Mandible, 34 joint of palp much shorter than 24, with long apical 
spines. Gnathopod 1, 5ttjoint longer than 6%, both spinose, 6!" rather broadly ovate, 
palm oblique, slightly convex, finely dentieulate, finger fitting palm. Gnathopod 2 
in d, 5tk joint short, cup-shaped, much narrower than the massive 6*, which 
is distally widened, hind margin nearly straight, front very convex, palm 
defined by a strong tooth between palmar spines, very oblique, with 1 or 2 
gaps, or with variable denticulation; finger strong, much or little curved. 
Peraeopods 1 and 2 slender, 1° rather longer than 24. Peraeopods 3—5 
rather stout, 3X much shorter than the following, 4% rather longer than 5th, 
22 joint narrowly oblong in peraeopod 3, broader in the others. Uropods 1 
and 2 not or scarcely reaching beyond peduncle of uropod 3. Uropod 3, 
rami subequal, broad and long, strongly serrate and spined on both margins, 
apices narrow, not acute. Telson short, broader than long, cleft nearly to 


‚base, almost the full width between the acute apices, inner margins of the 


lobes sinuous. Colour, spotted with erimson above, white below. L. reaching 
23 mm. 


Australian and Tasmanian waters, and off Cape Agulhas. Depth 9—282 m, and 
in sea-weed on sandy beach. 


2. C. semiserratus (Bate) 1862 Megamoera semiserrata, Bate (& Westwood), 
Brit. sess. Crust., v.1 p. 401 f. | 1862 M. s., Megamaera semmisefrata, Bate, Cat. Amphip. 
Brit. Mus., p.226; t.39 £.6 | 1869 Maera semiserrata, (A. M. Norman in:) G. S. Brady & 
D. Robertson in: Ann. nat. Hist., ser. 4 vo. 3 p. 359 | 1889 M. s., A. M. Norman 
in: Ann. nat. Hist., ser.6 v.4 p.127 | 1899 Ceradocus semiserratus, T. Stebbing in: Tr. 
Linn. Soc. Jaondon, ser.2 v.7 p.426 | 1893 C©. fasciatus (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 721. 


Body slender, smooth. Side-plates 1—4 each with a tooth at the 
lower hind corner. Pleon segment 3, postero-lateral corners rather produced, 
smooth below, but with the hind margin regularly serrate. Eyes narrowly 
reniform. Antenna 1 about half as long as body, 24 joint rather longer 
than 1°, 34 less than half as long as 1%, flagellum rather longer than peduncle 


Y 


432 Ceradocus 


Antenna 2 reaching little beyond peduncle of antenna 1. Gmnathopods 1 
and 2 somewbat similar in shape, but 1° (in figure) has 5t" joint longer than 
oblong oval 6%, both very hirsute; in the considerably larger gnathopod 2 
the 5b joint is rather shorter than the 6'%, which has the palm oblique, 
slightly denticulated, defined by short palmar spines. Peraeopods 1 and 2 
very slender. Peraeopods 3—5 successively longer, 24 joint not greatly 
expanded, serrate behind. Uropod 3 reaching far beyond the others, rami 
equal. Telson cleft, each lobe obliquely truneate. L. 6—7 mm. 


North-Atlantie (British Isles, West of France). 


3. C. orchestiipes A. Costa 1844 Gammarus fasciatus (non Say 18181) + 
Var. @. f. corallinus (nom. nud.)—+Var. @. f. violaceus (nom. nud.), ©. G. Costa in: Atti Acc. 
Borbon., e.5ı p.73 t.1 f.8 | 1893 Ceradocus f. (part.), A. Della Valle in: F. Fl. Neapel, 
©.20 p.721 t.6 £.1; t.21 £.17—33 | 1853 (©. orchestüipes, A. Costa in: Rend. Soc. Borbon., 
n. ser. v©.2 p.177 | 1899 €. o., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v©.7 p. 426 | 
1866 Maera o., Cam. Heller in: Denk. Ak. Wien, 0.2611 p.38 t.3 f.22,23 | 1862 Melita 
orchestipes, Bate, Cat. Amphip. Brit. Mus., p. 187 ! 1864 Megamoera o., E. Grube, 
Lussin, p. 73. 


Body dorsally smooth, rounded, but pleon segments 1—6 (variably: 
all to none) medio-dorsally produced into a tooth. Head without rostrum, 
laterai lobes narrowly produced. Side-plates 1—4 shallow, subquadrate, 1°* 
produced forward in an acute recurved point. Pleon segment 3, postero- 
lateral corners acutely outdrawn, with irregular and variable denticulation. 
Eyes small, oval, black (Heller), eireular, yellow-brown (Della Valle). Antennal 
about half as long as body, 24 joint thinner than 1°, as long or longer, 34 short, 
flagellum sometimes longer than peduncle, 40-jointed, accessory flagellum 7—10- 
jointed. Antenna 2 much shorter, gland-cone as long as the unusually long 
antepenultimate joint of pedunele, ultimate shorter than penultimate, flagellum 
longer than ultimate joint of peduncle and sometimes more than 20-jointed. 
Gnathopod 1, 24 joint eurved, 5 as broad as 6th and rather longer, 6t" 
oval, hind margin more convex than front, palm ill-defined, finger stout. 
Gnathopod 2 much larger, especially in J, 5t" joint small, 6% widening to 
the very oblique palm, which is defined by a strong tooth, and is regularly 
denticulate in ©, irregularly in C. In J the hands of gnathopod 2 often 
unlike in size and shape. Peraeopods 1 and 2 slender. Peraeopods 3—5 
successively longer, moderately robust, 24 joint oblong, not greatly expanded, 
hind margin smooth, distally produced into a small acuminate process. 
Uropods 1 and 2 reaching equally far back. Uropod 3 reaching much beyond 
the others, rami very long, equal, laminar, fringed with spinules, apices 
narrowly truneate. Telson cleft nearly to base, lobes dehiscent, with 2 spines 
between acute outer apex and inner angle. Colour, banded pale yellow and 
crimson, appendages variegated with the same hues. L. 15 mm. 


Mediterranean. Depth 17—-70 m. 


4. C. torelli (Gods) 1866 Gammarus t., Goes in: Öfv. Ak. Förh., ©.22 p. 530 
t.40 f,28 | 1867 Megamoera t., Bate in: Zool. Ree., ©.3 p.232 | 1871 Maera t., A. Boeck 
in: Forh. Selsk. Christian., 1870 p.208 | 1876 M.t., A. Boeck, Skand. Arkt. Amphip., 
v.2 p.380 | 1893 Ceradocus t., A. Della Valle in: F. Fl. Neapel, v.20 p. 723 | 1899 C.t., 
T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 426. 


Body elongate, smooth, not very compressed. Head, lateral lobes 
rounded, little prominent. Side-plates 1, 2 and 5 larger than 34 or 4, 
none very deep. Pleon segments 1—3, postero-lateral corners forming a 
pöinted hook. Eyes unknown. Antenna 1 about half as long as body, 


B 
gi Br: al 
Ta TE 


Ceradocus, Maera : 433 


peduncle very long, 24 joint longer than 1°, 34 scarcely '/, aslong as 24, flagellum 
shorter than peduncle, with 35 short joints, accessory flagellum 5-jointed. 
Antenna 2 much shorter, slender, gland-cone long, ultimate joint of pedunele 
shorter than penultimate, flagellum subequal to ultimate joint of peduncle, 
16-jointed. Gnathopod 1, 5% joint rather smaller than 6%, both hirsute. 
Gnathopod 2 much larger, 5t" joint short, cup-shaped, 6tb very large, oblong, 
widening a little to the oblique, well defined palm, which is much shorter 
than the hind margin, finger serrate within. Peraeopods 1 and 2 small. 
Peraeopods 3—5 rather robust, peraeopod 3 very short, 5" long; 24 joint 
not greatly expanded, hind margin serrate, forming below an acute corner. 
Uropods 1—3 as in C. orchestipes. Telson deeply eleft, lobes divergent, 
with spinules on outer margin and in the emarginate apices. L. over 50 mm. 


Aretie Ocean (Iceland). 


33. Gen. Maera Leach 


1813/14 Maera (Sp. un.: M. grossimana), Leach in: Edinb. Ene., v.7 p. 403, 432 
1893 M., A. Della Valle in: F. Fl. Neapel, v.20 p.724 | 1894 M., G.O. Sars, Crust. 
Norway, v.1 p.517 | 1843 Moera, L. Agassiz, Nomenel. zool., Crust. p.18 | 1853 Leptothoe 
(Sp. un.: L. danae), Stimpson in: Smithson. Contr., v.6 nr.5 p.46 | 1862 Megamoera 
(part.), Bate (& Westwood), Brit. sess. Crust., v.1 p. 400. 


Body more or less slender. Head without conspicuous rostrum. Side- 
plates shallow, 4 scarcely or not emarginate behind. Antenna 1 the longer, 
24 joint usually longer than 1°, accessory flagellum well developed. Antenna 2, 
flagellum short. Upper lip symmetric. Lower lip with inner lobes. Mandible 
with slender palp, 3@ joint straight. Maxilla 1, inner plate with few setae, 
outer with (probably) 10 spines. Maxilla 2, inner plate not fringed with setae 
on inner margin. Maxillipeds normal, but the 3 spine-teeth on apex of 
inner plate are not certainly present. Gmnathopods 1 and 2 subchelate, gnatho- 
pod 2 usually much the larger in the d. Peraeopods slender, peraeopods 4 
' and 5 longer than the rest, 24 joint of peraeopods 3—5 variable, sometimes 
very slender. Uropod 3 often reaching much beyond the others, rami equal 
or not very unequal, 1-jointed. Telson rather small, deeply cleft. 


12 accepted and 8 doubtful species. 


Synopsis of accepted species: 


Uropod 3 scarcely or not at all extending 
1 | beyond uropod 1 — 2. 
Uropod 3 extending much beyond uropod 1— 5. 
9 SE RN rar wer a EEE 1. M.tenera .... . p. 434 
With eyes — 8. 
3 Uropod 3, rami not apically obtuse. . . . . 2. M. quadrimana . . p.434 
Uropod 3, rami apically obtuse — 4. 
Peraeopods 4 and 5, 2d joint not produced 
4 N ET RITTER ERBE? 3. M. grossimana . . p.435 
Peraeopods4and5, 2d joint produceddownward 4. M.inaequipes . . . p.485 
5 Some segments dorsally dentate — 6. 
No segments dorsally dentate — 7. 
6 Pleon segment 1 without dorsal teeth. ... 5. M.tenuimana . . . p.436 
Pleon segment 1 with dorsal teeth ... . - 6. M. westwoodi . . . p. 486 
y { MR RO ER en ie 7. M. fureicornis . . . p.437 
Body not pubescent — 8. 


Das Tierreich. 21. Lief.: T.R. R. Stebbing, Amphipoda I. 28 


434 Maera 


8 Body extremely slender — ®. 
Body not extremely slender — 11. 

9 Gnathopod 2, palm excavate near definingangle 8. M.hamigera. . . . p.487 
Gnathopod 2, palm not excavate — 10. 

10 Peraeopod 5 shorter than peraeopod 4 .. . 9. M.tenella. ... . p. 438 
Peraeopod 5 not sherter than peraeopod 4 . 10. M.loveni ..... p. 438 
Pleon segment 3, postero-lateral corners serrate 

1 above and below, acutely produced . . . 11. M.othonis. ... . p- 438 
Pleon segment 3, postero-lateral corners serrate 

only above, quadrate . . . . 2.2. 22... 12. M. mastersi. . . . p.489 


1. M. tenera 0. Sars 1876 Moera tenella, Maera t. (non Gammarus tenellus 
J. D. Dana 1852|), G. O. Sars in: Arch. Naturv. Kristian., v.2 p. 259, 271 | 1885 Maera 
tenera,' G.O.Sars in: Norske Nordhavs-Exp., 0.6 Crust. I p.177 t.14 f.7 | 1893 M. t., 
A. Della Valle in: F. Fl. Neapel, v.20 p. 724. 


Body very slender, almost cylindrie, smooth. Head, lateral lobes 
-rounded, little prominent. Side-plates very shallow, 1° the deepest, rounded 
in front, produced a little forward. Pleon segment 3, postero-lateral corners 
. quadrate. Eyes entirely wanting. Antenna 1 elongate, 1% and 24 joints subequal, 
34 about !/, as long as 24, flagellum shorter than pedunele, 16-jointed, accessory 
flagellum 4-jointed. Antenna 2 of ”/, length of antenna 1, ultimate joint of 
peduncle shorter than penultimate, flagellum shorter than peduncle, 8-jointed. 
Gmathopod 1 small, 6! joint not larger than 5th. Gnathopod 2 powerful, 5tk joint 
(in figure) broad and rather longer-than broad, 6!" very large, almost quadrate, 
twice as large as 5th, setose, finger not very large. Peraeopods 1—5 very 
slender, with scanty armature, 3d—5tk with linear 24 joint, peraeopods 
4 and 5 elongate. Uropods 1—3, rami slender, lanceolate. Uropod 3 
reaching little beyond the others. Telson very small, deeply ineised. L. 
10 mm. 


North-Atlantie (Storeggen [Norway]). Cold area, depth 785 m. 


2. M. quadrimana (Dana) 1853 & 55 Gammarus quadrimanus, J. D. Dana 
in: U.S. expl. Exp., v.13ır p. 955 t.65 f.9 | 1862 Moera q., Bate, Cat. Amphip. Brit. 
Mus., p. 194 t.35 £.5 | ?1882 M.q., G. M. Thomson in: Tr. N. Zealand Inst., v. 14 p. 235 
t.17 £.4a, 4b | 1893 Maera truncatipes (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.725. 


Body slender, smooth. Side-plates 1—4 shallow, subquadrate. Pleon 
segment 3, postero-lateral corners said to be dentate (Della Valle). Eyes 
(in figure) small, rounded. Antenna 1, 1% and 22 joints long, subequal, 34 very 
short, flagellum rather ‚shorter than peduncle, accessory flagellum rather 
longer than half the primary. Antenna 2, peduncle shorter than in antenna 1, 
flagellum very short. Gnathopod 1 small, 6! joint oblong, both 5tk and 6tk 
widened distally,. Gnathopod 2, 5tk joint small, cup-shaped, 6tk very large, 
widened to the palm, which forms a somewhat obtuse angle with the hind 
margin, is divided into 3 blunt teeth, and defined by a long, acute tooth, 
separated from the others by a cavity (Thomson: front margin longer than 
the hind margin; 2 small teeth in place of the long defining tooth). Peraeo- 
pods 1 and 2 very slender. Peraeopods 3—5, 24 joint moderately expanded 
and produced downward, 4th joint rather broad, produced, finger sharply 
produced behind the short nail. Peraeopod 5 a little shorter or longer than 
peraeopod 4. Uropods 1—3 (in figure) reaching about equally far back. Uropod 3, 
rami straight, equal, in figure subacute, tipped with slender setae. Uropod 2 


Maera 435 


with very long rami (Della Valle), Telson undeseribed. Colour uniform 
vellowish white or dirty green. L, 12—16 mm. 


Tropical and South-Paeifie (Fiji Islands, eoral reefs; Paterson Inlet [New Zealand]). 


3. M. grossimana (Mont.) 1808 Cancer (Gammarus) grossimanus, Montagu 
in: Tr. Linn. Soe. London, @9 p.97 t.4 f.5 | 1812 Astacus g., Pennant, Brit. Zool., 
ed.5 v.4 p.33 | 1813/14 Maera grossimana, Leach in: Edinb. Ene., v.7 p.403. 432 | 1889 
M. g., A. M. Norman in: Ann. nat. Hist., ser. 6 v.4 p.126 | 1893 M. g. (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p.727 t.2 £.10; t.21 f.1—16; t.41 £.37 | 1818 Gammarus 
grossimanus, Lamarck, Hist. An.s. Vert., ».5 p.182 | 1862 Moera g., Bate, Cat. Amphip. 
Brit. Mus., p.188 t.34 f.3 | 1888 M. grossimana, T. Barrois, Cat. Crust. Acores, p.38 f. | 
1830 Gammarus impostii, H. Milne Edwards in: Ann. Sei. nat., v.20 p.368 | 1866 Maera 
donatoi, Cam. Heller in: Denk. Ak. Wien, 0.2611 p.41 t.3 f. 26. 


Body slender, smooth. Head, rostrum minute. Side-plate 1 acutely pro- 
duced forward, 24—4th quadrate. Pleon- segment 3, postero-lateral corners 
acutely produced, not serrate. Eyes narrow, sometimes reniform, reddish 
brown. Antenna 1, peduncle elongate, 24 joint longer, sometimes much 
longer than 1°, flagellum shorter than peduncle, 22-jointed, accessory flagellum 
8-jointed. Antenna 2 much shorter, gland-cone long, but not reaching end 
of antepenultimate joint of peduncle, penultimate slightly curved, longer than 
ultimate, flagellum short, 8- or 9-jointed. Mandibular palp slender, 1% joint 
slightly produced, 34 joint straight, shorter than 24. Maxilla 1, inner. plate 
with 3 setae at apex. Maxillipeds, inner plates with a spine tooth subapical 
on inner margin, others perhaps on apex, 4% joint of palp with spine-like 
nail. Gnathopod 1 slender, 5tk joint rather longer than 6tk, front margin 
distally acute, 6t" joint widened a little to the oblique convex palm. Gnatho- 
pod 2, 4% joint with acute hind margin, 5t% short, cup-shaped, 6th large, 
longer than broad, palm defined by a tooth, with its margin irregularly 
notched in J, regularly serrate or crenulate and convex in ©, finger match- 
ing palm, large, curved, outer margin fringed with setules. Peraeopods 1 
and 2 slender. Peraeopods 3—5, 24 joint little expanded, narrowing down- 
ward, slightly produced in peraeopod 3, but forming no free hind corner in 
peraeopods 4 and 5, finger with a short sharp nail on its blunt apex. Uropod 3 
not or not conspicuously reaching beyond uropod 1, the rami equal, rather 
longer than peduncle, apices squarely truncate, tipped with setae. Telson 
shorter than pedunele of uropod 3, cleft about */, of length, lobes very 
divergent, each having a tridentate apex, middle tooth longest, outer minute, 
with intervening spinules. Colour transparent yellowish, with rosy tinting. 
L. 6—9 mm. 


North-Atlantie with English Channel (Devon, Cornwall, Channel Islands; Azores; 
West France); Mediterranean. 

4. M. inaequipes (A. Costa) 1847 Amphithoe truncatipes (nom. nud.), (Spinola 
in MS.) A. White, Crust. Brit. Mus., p. 87 | 1893 Maera t. (part.), A. Della Valle in: F. 
Fl. Neapel, v.20 p. 725 t.1 f.2; t.22 f.26—-40 | 1851 Amphithoe inaequipes, (A. Costa 
in:) F. W. Hope, Cat. Crost. Ital., p.45 | 1857 Gammarus scissimanus, A. Costa in: 
Mem. Acc. Napoli, v.1 p.221 t.3 f.7 | 1866 Maera seissimana + M. integrimana, Cam. 
Heller in: Denk. Ak. Wien, 0.2611 p.40 t.3 f.24; p.40 t.3 f.25 | 1888 Moera s., F. 
Barrois in: Bull. Soc. zool. France, v.13 p.58 | 1888 M. s., F, Barrois, Cat. Crust. Acores, 
p-35 textf. | 1862 M. truncatipes + M. blanchardi, Bate, Cat. Amphip. Brit. Mus., p.189 
t.34 f.4; p.190 t. 34 £.5. , 


Body rather robust, smooth. Head, lateral lobes rounded. Side-plate 1, 
front corner a little produced, acute, 24 squarely rounded, small. Pleon 
28* 


436 Maera 


segment 3, postero-lateral corners not serrate. Eyes small, round, dark. Antennal 
slender, 24 joint longer than 1°, 34 rather short, flagellum rather shorter 
than peduncle, 15—26-jointed, accessory flagellum 7—11-jointed. Antenna 2 
rather longer than peduncle of antenna 1, gland-cone reaching beyond ante- 
penultimate joint of peduncle, ultimate scarcely shorter than penultimate, 
flagellum subequal to ultimate, 5—10-jointed. Gnathopod 1, 5b joint as long 
as 6th, 6th subovate, wider than 5t" at junction of hind margin with convex, 
ill-defined palm. Gnathopod 2 much larger, 5" joint small, cup-shaped, 
6th broad, a little longer than broad, palm almost transverse, defined by an 
acute tooth, margin in © convex, serrulate, in JS variable but usually with 
a deep central notch or cavity; finger powerful. Peraeopods 1—5 with tri- 
cuspidate finger, that is, having a nail projeeting between 2 points. Perae- 
pods 3—5, 24 joint moderately expanded, hind margin somewhat produced 
downward in a rounded lobe, peraeopods 4 and 5 equal. Uropods 1—3 
reaching about equally far back. Uropod 3, rami not very long, apically 
obtuse, tipped with setae. Telson deeply cleft, each lobe bidentate, a spine 
between the short outer and long inner tooth. Colour, dorsally green bronzed 
with a little red, gnathopods 1 and 2 tinged with green, other appendages 
pellueid, pinkish. L. 7 mm. 


Mediterranean; North-Atlantie (Azores). 


5. M. tenuimana (Bate) 1862 Gammarus tenwimanus (2), Bate (& Westwood), 
Brit. sess. Orust., v. 1 p. 384 f. | 1862 @. t., Bate, Cat. Amphip. Brit. Mus., p. 214 
t.38 f.2 | 1895 @. t., A. O. Walker in: Ann. nat. Hist., ser.6 0.15 p.471 | 1868 
Maera batei (3), A. M. Norman in: Ann. nat. Hist., ser. 4 v.2 p.416 t.22 f.1-3 | 
1889 M.b., A. M. Norman in: Ann. nat. Hist., ser.6 ».4 p.127 | 1898 M.b., A. Della 
Valle in: F. Fl. Neapel, 0.20 p.726 | 1895 Moera b., A. O. Walker in: P. Liverp. biol. 
Soe., v.9 p.808 |! 1868 Megamoera multidentata, (A. M. Norman in MS.) Bate & Westwood, 
Brit. sess. Crust., v.2 p.515 f. 


Pleon segments 2—6 dorsally dentate, 24 with 3, 34 with 5, 4th—6th 
each with 2 teeth, a spinule at inner side of base of each tooth. Head, lateral 
lobes somewhat produced, rounded. Side-plates 1—4 shallow, 24 seemingly. 
somewhat large in d. Pleon segments 2 and 3, postero-lateral corners 
acute, not serrate. Eyes ovate, dark. Antenna 1, 24 joint considerably longer 
than 1%, 34 short, flagellum about as long as peduncle, 22—24-jointed, 
accessory flagellum 4- or 5-jointed. Antenna 2 subequalto peduncle of antenna l, 
ultimate and penultimate joints of peduncle subequal, flagellum not longer 
than ultimate, 8-jointed. Gmathopod 1 slender, 5" and 6" joints parallel- 
sided, 6tk the shorter, palm slightly oblique, short. Gnathopod 2 in Q very 
like gnathopod 1, but 6" joint ovate, palm undefined, finger small; in J, 
5th joint small, cup-shaped, 6tk large, subreetangular, palm ?/, its length, 
with 3 tubercles, the one which defines the palm being flat-topped and setose, 
finger strongly eurved, leaving a gap when closed. Peraeopods 1 and 2 slender. 
Peraeopods 3—5, 24 joint not much expanded, in peraeopods 4 and 5 not 
forming a free corner below, finger strong. Uropod 1 much longer than 
uropod 2, but scarcely reaching beyond peduncle of uropod 3. Uropod 3, 
peduncle long, very stout, rami subequal, very long, laminar, fringed with 
spines. Telson with 1 spine at apex of each lobe. L. 6--9 (15?) mm. 

English Channel (Guernsey); Menai Strait and Liverpool Bay, depth 19-—88 m; 
Moray Firth, at mouth of rivers. 


6. M. westwoodi Stebb. 1855 Gammarus kroyeri (non H. Rathke 1843)), 
T. Bell in: Belcher, Last arct. Voy., v.2 p.405 t.34 f.4 | 1862 Megamoera kröyeri, Bate, 
Cat. Amphip. Brit. Mus., p.229 t.40 f.4 | 1898 Maera? k., A. Della Valle in: F. Fl. 


ae a Fr 


Bl 
n 

f 

X 


Maerä ; 437 


Neapel, v.20 p.730 | 1871 Melita dentata (err., non Gammarus dentatus Kroyer 1842!), 
A. Boeck in: Forh. Selsk. Christian., 1870 p.211 | 1888 M.d., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.281, 1710 | 1899 Maera westwoodi, T. Stebbing in: Tr. Linn. Soc. 
London, ser. 2 v.7 p.426. 


Little removed from M. tenuimana, but: pleon segment 1 dorsally 
dentate, accessory flagellum of antenna 1 extremely small, antenna 2 with 
- peduncle as long as pedunele of antenna 1, and gnathopod 2 (Bate) with 
6th joint ovate, palm oblique, straight (sinuous in figure) L. 22 mm. 


Wellington Channel [aretic Canada]. Depth 66 m. 


7. M. fureicornis (Dana) 1852 Gammarus f., J. D. Dana in: P. Amer. Ac., 
v.2 p.211 | 1853 & 55 @. f., J. D. Dana in: U.S. expl. Exp., v.13u p. 951 t.65 f.6 | 
1862 Moera f., Bate. Cat. Amphip. Brit. Mus., p.193 t.35 £.2 | 1888 Maera f., T. Stebbing 
in: Rep. Voy. Challenger, 0.29 p.1709 | 1893 M.? f., A. Della Valle in: F. Fl. Neapel, 
v.20 p. 730. 


Body rather slender, sparsely pubescent. Head, lateral lobes not prominent. 
Pleon segments 2 and 3, postero-lateral corners (in figure) not produced 
nor acute. Eyes (in figure) small, round. Antenna 1, 1° joint stout, 24 slender, 
a little longer, flagellum rather longer than peduncle, about 14-jointed, 
accessory flagellum about half primary, 5-jointed. Antenna 2 much shorter, 
but with pedunele nearly equal to that of antenna 1, its ultimate joint rather 
shorter than penultimate, flagellum subequal to penultimate, 7—10-jointed. 
Gnathopod 1 small, St" and 6*" joints subequal, 6" joint subovate. Gnathopod 2, 
5th joint short, eup-shaped, 6 broad, oblong, a little widening to the truncate, 
or very slightly oblique, and not exeavate palm; finger half as long as 6!% joint. 
Peraeopods 3—5 rather long, 5t" the longest, 24 "oint in all narrow oblong, 
hind margin serrulate. Uropods 1 and 2 reaching about equally far, uropod 
3 much farther, elongate. L. 6 mm. 


Sooloo Sea (shores of island off harbour of Soung). 


8. M. hamigera (Hasw.) 1879 Moera h., Haswell in: P. Linn. Soc. N. S. Wales, 
v.4 p.333 t.21 f.1 | 1888 Maera h., T. Stebbing in: Rep. Voy. Challenger, v.29 p.1709 | 
1893 M.h., A. Della Valle in: F. Fl. Neapel, v.20 p.723 | 1885 Megamoera suensis var., 
Haswell in: P. Linn. Soe. N.S. Wales, v.10 p. 103 t.15 £. 1—4. 


Body slender, smooth.. Head, lateral lobes not produced. Side-plates 
1—4 not deep, gi the largest. Pleon segment 3, postero-lateral corners 
apparently quadrate with a few teeth(?) on their posterior margin. Eyes 
long, narrow. Antenna 1 elongate, 24 joint longer than 1°; flagellum about 
as long as pedunele, 33-jointed; accessory flagellum 4— 6-jointed. Antenna 2 
about as long as peduncle of antenna 1, ultimate joint of peduncle shorter 
than penultimate, flagellum 13-jointed. Gnathopod 1 small, 6% joint ovate, 
palm not defined. Gmathopod 2, 5t" joint short, cup-shaped, 6!" more than 
twice as long as broad, widening a little to the pälm, which is little oblique, 
defined by an acute tooth separated by a cavity from 2 or 3 strong tubercles; 
finger strongly curved, short and thick; left gnathopod 2 smaller than right; 
larger hand with an acute tooth and 4 or 5 denticles, the smaller without 
denticles. Peraeopods 1 and 2 short, slender. Peraeopod 3 longer, not 
very stout. Peraeopods 4 and 5 long and stout. Peraeopods 3—5, 24 joint 
not much expanded. Uropods 1 and 2 reaching equally far, not to end of 
pedunele of uropod 3. Uropod 3 very large, peduncle long, rami more than 
twice as long as peduncle, ovate-lanceolate, with serrate margins. Halves 
of telson Jong and narrow, with a deep terminal notch. L. 12:5 mm. 


Port Jackson and Port Stephens [East-Australia]. 


438 Maera 


9. M. tenella (Dana) 1852 Gammarus tenellus, J. D. Dana in: P. Amer. Aec., 


v.2 p.212 | 1858 & 55 @. t., J. D. Dana in: U. S. expl. Exp., v.13u p.952 t.65 f.7 | 


1862 Moera tenella, Bate, Cat. Amphip. Brit. Mus., p.193 t.35 f.3 | 1888 Maera t., T. 
Stebbing in: Rep. Voy. Challenger, v.29 p.1710 | 1893 M. grossimana (part.), A. Della 
Valle in: F. Fl. Neapel, 0.20 p. 727. 


Body slender, smooth. Side-plates shallow. Pleon segment 3, postero- 
lateral corners seemingly a little produced but scarcely acute. Eyes small, 
round. Antenna 1, 1% joint not stout, 24 very long, flagellum little longer 
than peduncle, accessory flagellum half as long as primary, 7- or 8-jointed. 
Antenna 2 very slender, short, flagellum as long as ultimate joint of peduncle. 
Gnathopod 1 small, 6!» joint subovate. Gnathopod 2 stout, 5 joint small, 
narrow, cup-shaped, 6% broad, much longer than broad, widening a little 
distally; palm nearly straight truncate, not excavate, defined by a small 
acute tooth. Peraeopods 1 and 2 remarkably slender. Peraeopods 3—5, 
24 joint narrowing downward; peraeopod 5 rather shorter than 4*k, finger 


acutely produced behind the nail. Uropod 3 quite long, extending much 


beyond uropod 2. Telson oblong, apical setae as long as the telson. L. 8 mm. 
Tropical Paeifie (coral reefs of Fiji Island Viti Levu). 


10. M. loveni (Bruz.) 1859 Gammarus l., R. M. Bruzelius in: Svenska Ak. 
Handl., n.ser. &.8 nr.1 p.59 t.2 £.9 | 1862 Moera loveni, Bate, ('at. Amphip. Brit. 
Mus., p. 193 t.85 f.1 | 1868 Maera loveni, A. M. Norman in: Ann. nat. Hist., ser. 4 ©. 2 
p-416 t.21 f.11, 12 | 1893 M. loveni, A. Della Valle in: F. Fl. Neapel, ©.20 p.729 | 1894 
M. loveni, G. OÖ. Sars, Orust. Norway, v.1 p. 519 t.182 £.2. 


Body long, very slender, smooth. Head, lateral lobes narrowly rounded. 
Side-plates small, 1° the largest, produced forward in a linguiform lobe, 4 
twice as broad as deep, scarcely larger than 5th. Pleon segment 3, postero- 
lateral corners almost quadrate, with a little acute point. Eyes small, round, 
inconspieuous in spirit. Antenna 1 long, slender, 1° joint long, 24 longer, 
flagellum shorter than peduncle, 17— 30-jointed, accessory flagellum 5—7-jointed. 
Antenna 2 about half as long as antenna 1, ultimate joint of peduncle shorter 
than penultimate, flagellum not longer than ultimate, 7—12-jointed. Mandible, 
34 joint of palp shorter than 24. Maxilla 1, inner plate with 3 or 4 setae at 
apex. Gmathopod 1, 5tk and 6th joints subequal, setose on both margins, 
6 subovate, widest at the convex, ill-defined palm, finger with setae on 
outer margin and eilia on the inner. Gnathopod 2 rather powerful, 5th joint 
triangular, 6" large, oblong quadrangular, widest at the serrate, nearly 
transverse palm, defined by a small tooth, finger armed as in gnathopod 1. 
Peraeopods 1 and 2 very slender. Peraeopods 3—5, 24 joint little expanded, 
narrowing downward; peraeopods 4 and 5 elongate. Uropod 3 elongate, 
reaching much beyond the others, outer ramus about 2"/, times as long as 
peduncle, inner nearly as long as outer. Telson rather shorter than peduncle of 
uropod 3, cleft nearly to base, lobes Gonical, rather divergent, with spine 
between the shorter inner and longer outer tooth. L. JS reaching 26 mm. 

Arctie Ocean, North-Atlantie, North-Sea, Skagerrak and Kattegat (Disco [West- 
Greenland], depth 301 m; Spitzbergen, depth 87 m; Sweden, Norway, Denmark, Scotland). 


11. M. othonis (M.-E.) 1830 Gammarus o., H. Milne Edwards in: Ann. Sei. 
nat., ©.20 p. 868, 373 t.10 f.11—13 | 1889 Maera o., A.M. Norman in: Ann. nat. Hist., 
ser.6 v.4 p.125 | 1893 M. o., A. Della Valle ia: F. Fl. Neapel, v.20 p.729 t.60 £.8| 
1894 M. o., G. O. Sars, Crust. Norway, o©.1 p.518 t.182 f.1 | 1895 M.o., A.O. Walker 
in: P. Liverp. biol. Soe., v.9 p.308 | 1847 Gammarus longimanus, W. Thompson in: 
Ann. nat. Hist., v.20 p.242 | 1857 @.1., Bate in: Ann. nat. Hist., ser.2 v.19 p.145| 
1876 Megamoera longimana, A. Boeck, Skand. Arkt. Amphip., ©.2 p.382 | 1847 Gam- 


an 


Maera 439 


marus elongatus, (H. Frey &) R. Leuekart, Wirbell. Th., p. 160 | 1859 @. laevis, R.M. 
Bruzelius in: Svenska Ak. Handl.. n.ser.v.3 nr.1 p.60 t.2 f.10 | 1862 Megamoera 
longimana + M. othonis, Bate & Westwood, Brit, sess. Crust., v.1 p.4083 f.; p.405 £. | 
1896 Maera brooki, T. Seott in: P. phys. Soc. Edinb., v. 18 p.173 t.5 f. 1—6. 


Body moderately compressed, back smooth. Head, lateral lobes angularly 
produced. Side-plate 1 produced in front, obtusely acuminate, 24 deeper, 
4th quadrate, smaller than 34. Pleon segment 3, postero-lateral corners 
acutely produced and serrate above and below. Eyes oval reniform, dark. 
Antenna 1 slender, more than ?/, length of body, 24 joint longer and narrower 
than 1°, 34 short, flagellum longer than peduncle, 24—48-jointed, accessory 
flagellum 6- or 7-jointed. Antenna 2 about half as .long, ultimate and 
penultimate joints of peduncle subequal, flagellum short, 12—24-jointed. . 
Upper lip, apical margin faintly coneave. Mandibular palp slender, 3% joint 
as long as or longer than 2%. Maxilla 1, inner plate narrow, with 3 setae 
at apex. Gnathopod 1 slender, setose, 6% joint about as long as 5tk, oblong 
oval, palm very oblique, ill-defined, finger small. Gnathopod 2 in © rather 
stronger than gnathopod 1, 5t" joint distally widened and quadrate, 6% rather 
longer, narrowly oblong, palm oblique, mot strongly defined. Gnathopod 2 
in d much stronger, 5tt joint short, broadly eup-shaped, 6 elongate, oblong 
oval, palm minutely serrate and imperfectly defined or non-existent; finger 
half as long as 6!" joint or longer than it. Peraeopods 1 and 2 slender 
and short. Peraeopods 3—5, 24 joint well expanded, oval, forming a free 
hind corner, hind margin serrate. Uropod 3 reaching much beyond the 
others, rami narrowly lanceolate, subequal. Telson rather longer than peduncle 
of uropod 3, lobes narrowly conical, acute, divergent, with spinule in notch a 
little way up inner margin. Colour whitish, blotched with rose. L. 11—35 mm. 

North-Atlantic, North-Sea and Skagerrak (Bohuslän; Norway; Heligoland; 
British Isles; West-France); Mediterranean (Marseilles). & 


12. M. mastersii (Hasw.) 1879 Megamoera m., Haswell in: P. Linn. Soe. 
N.S. Wales, v.4 p.265 t.11 £.1 | 1899 Maera m., T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 0.7 p.426 | 1884 Megamoera thomsoni, Miers in: Rep. Voy. Alert, p.318 t.84 f.B| 
1893 Ceradocus rubromaculatus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 721. 


Body slender, back smooth. Head, lateral lobes rather narrowly produced. 
Side-plates I—4 rotundo-quadrate, not very deep but much deeper than the 
3 following. Pleon segment 3, postero-lateral corners quadrate with their 
bind margin denticulate. Eyes narrowly reniform. Antenna 1, 24 joint of 
peduncle little longer than 1°, 34 short, flagellum as long or nearly as long 
as peduncle, accessory flagellum 4-jointed. Antenna 2, peduncle as long as 
that of antenna 1 or a little longer, flagellum subequal to ultimate joint of 
peduncle. Gnathopod 1, 5!" and 6th joints slender, equal; palm straight, 
smooth, oblique, hind margin strongly convex, with-4 small teeth. Gmatho- 
pod 2 much larger, 4 joint produced into a small acute tooth, 6th oval, 
palm oblique, irregularly denticulate, defined by a small tooth. Peraeopods 3—5, 
24 joint well expanded, oval, with free corner, hind margin serrate, peraeo- 
pod 5 scarcely so long as 4%. Uropod 3 reaching much beyond the others, 
peduncle short and broad, rami equal, broadly lanceolate. Telson cleft to 
base, lobes bluntly conical, a little divergent, with 3 small teeth at the 
extremity and a notch armed with a single seta near the distal end of the 
inner border (Haswell), or with a row of spinules along the inner margin 
to the apex (Miers). Colour (in spirit) light yellowish brown. L. 11 mm. 

Port Jackson [East-Australia]; Torres Strait (Albany Island, Prince of Wales’ 
Channel and Thursday Island). Depth 7—17 m. 


440 Maera 


M. albida (Dana) 1852 Gammarus albidus, J. D. Dana in: P. Amer. Ac., v.2 


p-210 | 1853 & 55 @.a., J. D. Dana in: U.S. expl. Exp., v. 13m p.948 t.65 f.4 | 1862 


Megamoera albida, Bate, ‘Cat. Amphip. Brit. Mus., p.231 t.40 f.7 (inaccurate copy) | 
1893 Maera? a., A. Della Valle in: F. Fl. Neapel, v.20 p. 730. 


Uropods 1—3 all long; uropod 1 extends a little beyond the others, 


Tropical Paeifie (Samoan Island Tongatabu). In shallow waters of the lagoon, 
among sea weed. 


M.aspera (Dana) 1852 Gammarus asper, J. D. Dana in: P. Amer. Ac., v.2 
p.209 | 1853 & 55 G.a., J. D. Dana in: U.S. expl. Exp., v. 1311 p. 945 t.65 f.2 | 1862 
Megamoera aspera, Bate, Cat. Amphip. Brit. Mus., p.230 t.40 f.5 | 1893 Elasmopus? asper, 
A. Della Valle in: F. Fl. Neapel, 0.20 p.737 | 1899 Maera aspera, T. Stebbing in: Tr. 
- Linn, Soc. London, ser.2 v.7 p. 426. 


Pleon segments dorsally denticulate, denticulation irregular and not confined 
to the posterior margin. Mandibular palp small, slender, 1st joint short, 24 as long as 34, 
Peraeopods 3—5, 2d joint oblong, hind margin serrate. L. 12 mm. 


Sooloo Sea. Depth 12 m. 


M. danae (Stimps.) 1853 Leptothoe d., Stimpson in: Smithson. Contr., v.6 nr.5 
p.46 t.3 f.32 | 1862 Moera d., Bate, Cat. Amphip. Brit. Mus., p. 190 t.34 f.6 | 1888 
Maera d., T.. Stebbing in: Rep. Voy. Challenger, v.29 p.277 | 1898 M.d., A. Della Valle 
in: F. Fl. Neapel, v.20 p.731. 


Fundy Bay (Grand Manan). Laminarian zone, on sandy patches among weedy rocks. 


M. fusca (Bate) 1864 Moera f., Bate in: P. zool. Soc. London, p. 667 | 1888 
Maera f., T. Stebbing in: Rep. Voy. Challenger, v. 29 p.345, 1709 | 1893 Mm. f., A. Della 
Valle in: F. Fl. Neapel, v.20 p. 731. 


North-Paeific (Esquimalt Harbour [Vancouver Island]). Depth. 19 m, from sponge. 


M.indica (Dana) 1853 & 55 Gammarus? indicus, J. D. Dana in: U, S. expl. 
Exp., v.13u p. 961 t. 66 f.4 | 1893 @. i., A. Della Valle in: F. Fl. Neapel, v.20 p. 454 | 
1862 Megamoera indica, Bate, Cat. Amphip. Brit. Mus., p.232 t.40 f.9 | 1899 Maera i., 
T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 426. 


Suggestive of a Sunamphitoe (p. 645); but see figure of uropod 3. L. 8 mm. 
Balabae Passage [North of Borneo]. Shores of a small coral island. 


M. kürgensis (Gerstf.) 1858 Gammarus k., Gerstfeldt in: M&m. pres. Ac. 
St.-Petersb., v.8 p.290 | 1888 @. k., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 309 | 
1893 Amathilla? k., A. Della Valle in: F. Fl. Neapel, v.20 p.766. 


L.4-5mm. 
Arctic Ocean (pond on the Kürga [Siberia)). 


M. massavensis (Kossm.) 1880 Moera m., Kossmann, Reise Roth. Meer., 
v.2ı Malacost. p. 133 t.14 f. 9—11 | 1888 M. m., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.516 | 1893 Maera truncatipes (part.), A. Della Valle in: F. Fl. Neapel, v.20-p.725. 


Probably identical with M. tenella (p. 438). L. 4 mm. 
Red Sea. 


M. pubescens (Dana) 1852 Amphithoe p., J. D. Dana in: P. Amer. Ac., vu.2 
p-214 | 1853 & 55 Gammarus? ps J. D. Dana in: U.S. expl. Exp., v. 131m p. 960 t. 66 
f.3 | 1862 Gammarella p., Bate, Cat. Amphip. Brit. Mus., p. 181 t.38 f.1 | 1893 Elas- 
mopus? p., A. Della Valle in: F. Fl. Neapel, v.20 p. 737. 


Tropical Pacifie (Kingsmills). Coral reef. 


Ei ; r 
a a RB a RER 


5% 


EU RT PET NEE VER CR in 


Elasmopus 441 


34. Gen. Elasmopus A. Costa 


1853 Elasmopus (Sp. un.: E. rapaz), A.Costa in: Rend. Soe. Borbon., n. ser. v.2 
p. 170, 175 | 1871 E., A. Boeck in: Forh. Selsk. Christian., 1870 p.212 | 1888 E., T. 


 Stebbing in: Rep. Voy. Challenger, v.29 p.1018 | 1893 E., A. Della Valle in: F. Fl. 


Neapel, v.20 p.732 | 1894 E., G. O. Sars, Crust. Norway, v.1 p.520 | 1862 Megamoera 
(part.), Bate (& Westwood), Brit. sess. Crust., v.1 p. 400. 


Head with lateral lobes rounded. Side-plates I—4 usually well deve- 
loped and the 4! excavate behind and deeper than 5t%. Antenna 1 longer 
than antenna 2, 24 joint subequal to 1°, accessory flagellum seldom long. 
Antenna 2, flagellum short. Mouth-parts in general as in Maera (p.433), but 34 
joint of mandibular palp usually falcate, and peetinate with spinules. Maxilla 1, 
outer plate sometimes with only 7 spines. Gnathopods 1 and 2 as in Maera. 
Peraeopods 3—5 robust. Uropod 3 reaching little or not at all beyond 
the others, rami broad, not long. Telson rather small, deeply cleft. 


9 accepted and 4 doubtful species. 
Synopsis of accepted species: 


1 One or more of the segments dorsally dentate — 2. 
None of the segments dorsally dentate — 4. 


Only one segment dorsally dentate ..... . 1. E. subcarinatus . p.441 
Four segments dorsally dentate — 3. 
3 f Gnathopod 2, palm very oblique.. ...... 2. E. diemenensis . p.442 
\ Gnathopod 2, palm nearly transverse. . . . . - 3. E. suensis . . . . p.442 
| Gnathopod 2, 6th joint fringed with very long setae 4. E. brasiliensis . . p. 443 
4 X Gnathopod 2, 6th joint not fringed with very long 
T ek 
Gnathopod 2, 6th joint with eup-like hollow to 
5 | zonBine Suser- Dom... ..4.5 u 2...» 5. E. pocillimanus . p.443 
Gnathopod 2, 6th joint without cup-like hollow — 6. 
6 Uropod 3, rami obtusely lanceolate . . ... . 6. E. delaplata . . . p.444 
Uropod 3, rami truncate — 7. 
- { Antenna 1, accessory flagellum very short . .. 7. E,rapax.... . p.444 
Antenna 1, accessory fagellum well developed — 8. 
8 j Gnathopod 2, palm transverse. ........ 8. E.viridis . . . . p.445 
\ Gmathopod 2, palm oblique. ..... 2... 9. E. boeckii . . . . p-445 


1. E.subcarinatus (Hasw.) 1879 Megamoera sub-carinata, Haswell in: P. Linn. 
Soc. N.S. Wales, v.4 p.335 t.21 f.4 | 1884 Moera s., Chilton in: N. Zealand J. Sei., 
v.2 p.230 | 1888 Elasmopus s., E. persetosus, T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1019 t.98 | 1893 E. subcarinatus, A. Della Valle in: F. Fl. Neapel, 0.20 p. 733 | 
1882 Moera petriei, &. M. Thomson in: Tr. N. Zealand Inst.v.14 p.236 t.18 f£.3 | 1883 
M. p., Chilton in: Tr. N. Zealand Inst., v.15 p.82 t.2 f. 4a. 


Pleon segment 4 behind the dorsal depression bicarinate, the 2 apical 
teeth slightly inclined one toward the other. Head, lateral lobes broadly 
rounded, a small accessory lobe below the principal. Side-plate 1 somewhat 
produced forward, 4% the largest, much deeper than 5th, Pleon segment 3, 
postero-lateral corners acute, a little produced. Eyes large, reniform or 
oval, dark, advaneing on to lateral lobes of head. Antenna 1 elongate, 
1° joint about as long as 24, much stouter, 34 not long nor yet very 
short, flagellum longer than peduncle, 50—60-jointed, accessory flagellum 
6-jointed. Antenna 2 much shorter, ultimate joint of peduncle shorter than 
penultimate, flagellum shorter than peduncle, 14—17-jointed. Upper lip 


442 Elasmopus 


faintly emarginate at apex. Lower lip with unusual distal narrowing of 
inner lobes. Mandible with slender palp, 3% joint longest, straight, (not falcate, 
as seems usual in the genus), and with few setae but no long row of 
spinules. Maxilla 1, inner plate with 3 setae on apex, outer with 7 spines. 
Maxilla 2, inner plate fringed on distal part of inner margin. Gnathopod 1 
setose, 5!" joint a little shorter than 6%, 6th oblong, palm slightly oblique, 
convex, pectinate, well-defined, finger closing against small palmar spines 
on inner surface of the joint. Gnathopod 2 much larger in JS, 5% joint 
short, broad, cup-shaped, 6'% still broader, breadth */, of length, fringed behind 
with (Chilton: devoid of) very long setae, especially in C (as in E. brasiliensis), 
palm forming a broad spinulose process near.the finger-hinge, followed by 
a cavity, a strong tooth, a feeble oblique emargination and a defining 
dentiele; finger finely erenulate, strongly bent, with process touching the 
central palm-tooth, apex reaching the palmar denticle.e In Q gnathopod 2 
has 5th joint rather longer than broad, 6!" scarcely broader than 5%, nearly 
twice as long as broad, palm oblique, not dentate, both joints very setose, 
finger slender, acute. Peraeopods 3—5, 24 joint rounded oblong, well 
expanded, especially in peraeopod 5, 4% joint large, 5th and 6th also stout, 
finger short. Uropods 1—3, rami a little unequal, with obtuse apices. 
Uropod 3, pedunele short, rami broad, laminar, inner slightly tbe shorter, 
with spines chiefly on inner margin, outer with spines chiefly on outer 
margin, each with spines on the truncate apex. Telson scarcely as long as 
pedunele of uropod 3, not quite as long as broad, lobes widely divergent, outer 
tooth of apex produced much beyond the inner, 2 unequal spines intervening. 
Colour whitish with brown dots, antennae banded with brown. L. about 14mm. 

South-Pacifie (Port Jackson, from low water to 66 m; Sydney Harbour; Botany 
Bay; Port Stephens; off Melbourne; Port Pegasus and Lyttelton Harbour [New Zealand], 
and at a depth of 2071 m). 


2. E. diemenensis (Hasw.) 1879 Megamoera d., Haswell in: P. Linn. Soe. 
N.S. Wales, v.4 p.266 t.11 f.3 | 1893 Elasmopus rapax (part.)?, A. Della Valle in: 
F. FI. Neapel, v.20 p. 736. 


Pleon segments 1—4 each with a pair of strong spines [teeth] on 
its posterior margin near the middle dorsal line. Eyes reniform. Antenna 1, 
24 joint narrower and longer than 1°, flagellum longer than peduncle, 
accessory flagellum 4-jointed. Antenna 2, peduncle shorter than peduncle of 
antenna 1, flagellum shorter than pedunele. Gnathopod 1, 5tk and 6th joints 
subequal, setose, 6% irregularly ovate, palm simple, oblique, ill-defined. 
Gnathopod 2 much larger, 5 joint short, cup-shaped, 6tb very large, seemingly 
piriform, finger elosing against its inner surface. Peraeopods 3—5, 24 joint 
rounded oblong, well expanded, especially in peraeopod 5, 46th joints 
very stout, finger small. Uropod 3, rami subequal, twice as long as peduncle, 
laminar. Telson with the halves laterally compressed, each terminating in 
2 acute spines [teeth], and armed with a few short setae. L. 22 mm. 


Bass Strait (Tasmania). 


3. E. suensis (Hasw.) 1879 Megamoera s., Haswell in: P. Linn. Soe. N. S. Wales, 
v.4 p.335 t.21 f.5 | 1884 M. s.?, M. haswelli, Miers in: Rep. Voy. Alert, p. 317, 318 | 
1885 M. s. (part.), Haswell in: P. Linn. Soc. N. S. Wales, v.10 p.103 | 1899 Elasmopus s., 
T. Stebbing in: Tr. Linn. Soe. London, 'ser.2 2.7 p.426 | 1893 Ceradocus fasciatus 
(part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 723, 729. 


Body rather robust, peraeon segment 7 and pleon segments l and 2, 
each with 2 small dorsal teeth, segment 3 dorsally emarginate, not dentate, 


Elasmopus et: 443 


segment 4 dorsally produced into 2 strong teeth. Head with a small lateral 
tooth behind the lateral lobes. Side-plates 1—4 rather deep, 1° in front 
rounded or subacute, not much produced. Pleon segment 3, postero-lateral 
corners truncated and armed with 3—5 teeth. Eyes oval, black. Antenna 1 
elongate, 24 joint rather longer than 1°, 34 very short, accessory flagellum 
with 3 rather long joints. Antenna 2 shorter, ultimate joint of pedunele shorter 
than penultimate. Gmathopod 1 as in E. subcarinatus (p. 441). Gnathopod 2 
5th joint short, broad, cup-shaped, 6 large, oblong, rounded at base, slightly 
widened distally, palm nearly transverse, not defined by a tooth, but diversified 
by a shallow emargination and 3 or 4 very obscure indications of teeth. 
Peraeopods 1 and 2 very slender, finger long. Peraeopods 3—5 as in 
E. subcarinatus. Uropod 3, rami subfoliaceous, rather narrow-ovate, and not 
greatly elongated. Telson, lobes subeylindrical, tipped with a few setae. 
Colour (in spirit) light brownish pink. L. 8—9 mm. 

Torres Strait (Sue Island, Albany Island);. Port Denison [East-Australia]. 
Depth 6—8 m. 


4. E. brasiliensis (Dana) 1853 & 55 Gammarus b., J. D. Dana in: U.S. expl. 
Exp., v.13u p.956 t.65 f.10 | 1888 @. b,, Elasmopus (part.)?, T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.267,516 | 1893 @.b., E.(part.)?, A. Della Valle in: F. Fl. Neapel, v.20 
p. 737, 927 | 1880 Moera b., Kossmann, Reise Roth. Meer,, ©.21 Malacost. p. 1352 | 1862 
Gammarella b. + ?M. pectenicrus, M. pectinicrus, Bate, Ost. en Brit. Mus., p. 180 
t.32 f.9; p.192 t.34 f. 8. 


Body smooth. Eyes small, and (Bate) irregular. Antenna 1, flagellum 
rather longer than peduncle, many-jointed, accessory flagellum very small 
and short (Dana), 2-jointed (Bate). Antenna 2 half as long as antenna 1, 
flagellum short. Mandible, 34 joint of palp (Dana’s figure) falcate, with long 
row of spinules. Gnathopod 1 small, 5t® and 6t% joints subequal, 6!" subovate, 
hirsute on hind margin. Gnathopod 2 very stout, 5% joint short, cup-shaped, 
6'h large, piriform, densely furnished behind with long slender setae, palm 
oblique, not defined (Bate mentions a tubercle near the finger-hinge), finger 
long, eurved. Gmathopod 2 in 9 much smaller than in d, 6% joint subovate, 
setose. Peraeopods 1—5 apparently much as in E. subcarinatus (p. 441) 
and ‘other species; (Bate: peraeopod 4, 24 joint abruptly narrow distally). 
Uropods 1—3 subequal. L. 8—9 mm. 


Tropical Atlantie (Rio Janeiro); tropical Paeifie (New Guinea)? 


5. E, pocillimanus (Bate) 1862 Moera p., Bate, Cat. Amphip. Brit. Mus., p.191 
t.84 £.7 | 1888 Maera p., T. Stebbing in: Rep. Voy. Challenger, ©.29 p.535 | 1893 
Elasmopus p., A. Della Valle in: F. Fl. Neapel, «20 p.733 t.1 f.4; t.22 £.23—25 | 
?1874 Moera levis, (S.I. Smith in:) A. E. Verrill in: Rep. U.S. Fish Comm., v.1 p.559. 


Body very robust. Side-plate 1 rhomboidal. Pleon segment 3, postero- 
lateral corners produced, their hind margin crenulate. Eyes large, elliptie, 
tending to reniform, violet-brown. Antenna 1 nearly as long as body (Della 
Valle) or half as long (Bate), flagellum as long as peduncle, accessory flagellum 
rudimentary. Antenna 2 much shorter, flagellum very short. Gmathopod 1, 
5 and 6th joimts equal, not large, finger small; 6tk joint differing on right 
and left side. Gmathopod 2, 5 joint short, eup-shaped, 6'h Jarge, long, a 
little narrowed distally, palm without processes or defining tooth, but im 
place of the latter having a bowl-shaped excavation of the inner surface 


for receiving the tip of the finger, which (Della Valle) is obtuse. Peraeo- 


pods 1—5 much as in the preceding species. Uropods 1—3 extending 
nearly to the same length. Uropod 3, rami scarcely longer than the peduncle, 


444 Elasmopus 


fringed and tipped with short spines. Colour pellueid, lightly banded with 
crimson. L. 10 mm. 


Mediterranean (Italy); North-Atlantic (New Jersey, Long Island Sound, Vine- 
yard Sound)? 


6. E. delaplata Stebb. 1888 E. d., T. Stebbing in: Rep. Voy. Challenger, v.29 
p. 1025 t.99 | 1893 E. rapax (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 736. 


Body smooth. Head as in E. subcarinatus (p. 441). Side-plate 1 obtusely 
much outdrawn, 24 and 3% narrowing downward, 4 excavate behind, deeper 
than 5th, Pleon segment 3, postero-lateral corners subacute, a little outdrawn, 
their hind margin rather strongly serrate. Eyes small, oval, near margin 
of lateral lobes of head, white in spirit. Antenna 1 elongate, 1% joint stouter 
and longer than 24, 34 at least ?/, as long as 24, flagellum longer than peduncle, 
35-jointed, accessory flagellum with 3 long joints and a short one. Antenna 2 much 
shorter, ultimate joint of pedunele rather shorter than penultimate, flagellum 
16-jointed. Mandible, 3% joint of palp elongate, falcate, with long fringe 
of spinules. Maxilla 1, inner plate with 1 seta and 3 or 4 setules, outer 
plate with 7 spines. Maxilla 2, inner plate not fringed on inner margin. 
Gnathopods 1 and 2 nearly as in E.subcarinatus, but in gnathopod 2 palm with an 
irregular toothed eminence near finger-hinge, the strongly bent finger touching 
this but leaving a gap between its inner margin and the sinuously sloping 
remainder of the palm, and closing down between 2 small processes on 
inner surface of the 6!" joint. Peraeopods I and 2 slender. Peraeopods 3—5 
moderately robust, but less stout than in most species, 24 joint oblong oval. 
Uropod 1 reaching beyond uropod 2, uropod 3 a little beyond uropod 1. 
Uropod 3, rami broad, lanceolate, the ends a little obtuse, not truncate, 
outer ramus rather longer than inner. Telson rather longer than broad, 
oval, cleft nearly to base, lobes only apically dehiscent, each with spine and 
cilium in notch of outer margin a little above the apex. L. 18 mm. 


South-Atlantie (Monte Video). Depth 1130 m. 


7. E.rapax A.Costa 1853 E.r., A. Costa in: Rend. Soc. Borbon., n. ser. v.2 p. 175 | 
1889 E. r. (part.?), A. M. Norman in: Ann. nat. Hist., ser.6 v.4 p.124 t.11 f.1—8 (?f. 3) | 
1894 E.r., G. O. Sars, Crust. Norway, ®.1 p. 521 t.183 | 1857 Gammarus brevicaudatus 
(non H. Milne Edwards 1840!), Bate in: Ann. nat. Hist., ser.2 v.19 p.145 | 1862 Mega- 
moera brevicaudata, Bate (& Westwood), Brit. sess. Orust., v.1 p.409 f..| 1862 M.b., Bate, 
Cat. Amphip. Brit. Mus., p.228 t.40 f.2 | ?1866 Maera b., Cam. Heller in: Denk. Ak. 
Wien, v.26u p.42 t.3 f.27,28 | 1871 Elasmopus latipes, A. Boeck in: Forh. Selsk. 
Christian., 1870 p.212 | 1876 E.Ll., A. Boeck, Skand. Arkt. Amphip., ©.2 p.393 t.24 
f£.1 | 1887 E. 1, Chevreux in: Bull. Soe. zool. France, v.12 p.229 f.3 | 1893 E. affinis + 
E.rapax, A. Della Valle in: F. Fl. Neapel, ©.20 p.734 t.1 £.9, t.22 f.1—15; p. 736 
t. 22 f. 16—22. 


Body robust, smooth. Head, lateral lobes broadly rounded, obtuse 
accessory lobe below the prineipal. Side-plate 1 angularly but very slightly 
produced in front, 4 excavate behind, much deeper than 5tt, Pleon segment 3, 
postero-lateral corners subquadrate, their hind margin indented. Eyes rounded 
oval, rather large, very dark (Sars), rosy, pale with white spots (Della Valle). 
Antenna 1, 1° and 24 joints subequal in length, 3X more than half as long as 24, 
flagellum rather shorter than peduncle, many-jointed, accessory flagellum 
2-jointed. Antenna 2 much shorter, ultimate and penultimate joints of peduncle 
subequal, together longer than flagellum. Gnathopod 1, 6tk joint longer than 
5th, oval quadrangular, palm nearly transverse, well-defined. Gnathopod 2 
in JS, 5th joint short, broad, cup-shaped, 6!" powerful, somewhat piriform, 


u 


En are men 
Bleu =, dj» 


a te 


ET RZ, 6 year 3 ’ a 


Elasmopus 445 


palm with rounded, denticulate lobe near finger-hinge, and 2 widely separated - 
dentiform projections from within the margin, finger very strong and curved; 
(Della Valle: 2 obtuse tubereles on the palm margin of E, affinis). In the 
oO the 5th joint is less broad, the 6! more regularly ovate, finger impinging 
against spines on inner surface but not into a groove. Peraeopods 1 and 2 
of moderate size. Peraeopods 3—5 very robust (Sars: peraeopod 4 the 
longest, but?). Uropod 3 reaching somewhat beyond the others, rami stout, 
with truncate spinose apices, outer ramus rather the larger. Telson little 
longer than broad, cleft nearly to base, lobes oblong, scarcely divergent, 
3 or 4 spines in subapical notch, of outer margin. Colour greyish or yellowish, 
sometimes with dark spots (Della Valle). L. 8—10 mm. 


North-Atlantie (Christianiafjord, British Isles, France, Azores); Mediterranean. 


8. E. viridis (Hasw.) 1879 Moera v., Haswell in: P. Linn. Soc. N. S. Wales, 
v.4 p.333 t.21 f.1 | 1899 Elasmopus v., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 
x.7 p.426 | 1883 Moera incerta, Chilton in: Tr. N. Zealand Inst., v.15 p.83t.3 f.3| 
1893 Maera truncatipes (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 725. 

Body smooth. Side-plates 1—4 very shallow. Eyes round. Antenna 1, 
24 joint slightly narrower and a little longer or shorter than the elongate 1°; 
34 short; flagellum not so long as peduncle, 15—20-jointed; accessory 
flagellum half as long as primary, with 5—8 long joints. Antenna 2, peduncle 
subequal to peduncle of antenna 1; ultimate joint of peduncle shorter than pen- 
ultimate; flagellum not quite as long as ultimate joint of peduncle, 7—9-jointed. 
Gnathopod 1 small, 5tk joint about as long as ovate 6t", palm rather oblique, 
moderately well defined. Gnathopod 2 in JS, 5t% joint cup-shaped, 6! very 
large, oblong, a little widened distally, palm transverse, crenulate, with small 
central gap, defined by one tooth (not 3), finger with central cavity and 
pronounced tooth matching hollow of palm; 6% joint in 9 with the palm 
straight (Chilton: palm defined by a short stout tooth, with short stout 
setae along the whole.) Peraeopods 1 and 2 rather slender; peraeopods 3—5 
stout (Chilton: finger with a produced point behind the nail). Uropod 3 
reaching little beyond the others, rami broad, truncate, apically spinose, outer 
sometimes the longer, with 2 groups of spines on outer margin. Telson 
eleft nearly to base, lobes oblong, searcely dehiscent, with spines in bidentate 
apices. Colour light green. L. 5—6 mm. 

South-Paeific (Port Jackson [East-Australia]; Lyttelton Harbour Mew Zealand]). 


9. E.boeckii (Hasw.) 1879 Megamoera b., Haswell in: P. Linn. Soc. N. S. Wales, 
v.4 p.336 t.21 f.6 | 1898 Maera? b., A. Della Valle in: F. Fl. Neapel, v.20 p.732 | 
1899 Elasmopus b., T: Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 426. 

Eyes oblong. Antenna 1, 1% and 24 joints subequal, 39 short, flagellum 
longer than pedunele, accessory flagellum with 4_long joints. Antenna 2 
much shorter, flagellum a little longer than ultimate joint of peduncle. 
Gnathopod 1, 6% joint ovate, hirsute, palm undefined. Gnathopod 2 much 
larger, 5" joint not very broad, cup-shaped, 6tk described as ovate (figured 
as oblong), twice as long as broad, palm oblique, slightly excavate, with 
4 small teeth, finger rather more than '/, as long as 6" joint. Peraeopods 3—5 
rather stout, serrated. Uropod 3 short, broad, truncate, spinose. L. 4 mm. 

Port Jackson [East-Australia]. 


E. crassimanus (Miers) 1884 Moera crassimana, Miers in: Rep. Voy. Alert, 
p- 316 | 1899 Elasmopus crassimanus, T. Stebbing in: Tr. Linn. Soc. London, ser. 2 
v.7 p. 426. 


446 Elasmopus, Plesiogammarus 


Body smooth. Pleon segments 1—3, postero-lateral corners acute, little produced. 
Gnathopod 1, 5th joint little shorter than 6th. Gnathopod 2, 5th joint broad, 6th longer 
than broad, narrower distally, with the distal margin very oblique, not acute, but 
presenting a broad surface, against which the strong arcuate finger eloses, and armed 
with 4 spines or lobes, of which the inner 2 are small. Peraeopods 3—5 rather 
robust, 2d joint not serrated. Uropod 3, rami subequal, broader and slightly shorter 
than the others. 

Port Jackson [East-Australia]. 


E. erythraeus (Kossm.) 1880 Moera erythraea, Kossmann, Reise Roth. Meer., 
v.2ı Malacost. p. 132 t.14 f.1—8 | 1888 Elasmopus erythraeus, T. Stebbing in: Rep. 
Voy. Challenger, v.29 p.516 | 1893 E. rapax (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p. 736. 

Probably the young of another species of Elasmopus. L. about 6 mm. 


Red Sea. 


E. miersi (Wrzesn.) 1879 Maera m., Wrzesniowski in: Zool. Anz., v.2 p. 348 | 
1888 M. m., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 502 |'1893 M. m., A. Della 
Valle in: F. Fl. Neapel, v.20 p.732 | 1899 Elasmopus m., T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 v.7 p.426. 

L. 9 mm. 

Chimbote Bay [Peru]. Under stones in tide-pools. 


E. peruvianus (Dana) 1852 Amphithoe peruviana, J. D. Dana in: P. Amer. 
Ae., u.2 p.215 | 1855 & 55 Gammarus? peruvianus, J. D. Dana in: U.S. expl. Exp., 
v.lönm p. 958 1.66 f.2 | 1893 Elasmopus (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 
p: 454 | 1862 Megamoera perwviensis, Bate, Cat. Amphip. Brit. Mus., p.231 t.40 £. 8. 

Near E. brasiliensis (p. 4438), compare also E. delaplata (p.444). Peraeopods 1 
and 2 about as long as peraeopod 5, whieh is longer than peraeopod 4. L. about 12 mm. 

Tropical Pacific (Island of San Lorenzo [Peru]. Among sea-weed on the shore. 


35. Gen. Plesiogammarus Stebb. 


1899 Plesiogammarus (Sp. typ-: P. gerstaeckeri), T. Stebbing in: Tr. Linn. Soe. 
London, ser.2 v.7 p. 426. 


Near to Gammarus (p. 460), with 6 joint of gnathopod 1 smaller 
than that of gnathopod 2, but with marginal inflation of many segments, 
some dorsal setae but no dorsal spines, peduncle of antenna 1 longer than 
peduncle of antenna 2, 24 joint of peraeopods 3—5 long and narrow, uropod 1 
reaching end of the short uropod 3 and telson not cleft to the base. 


l species. 


1. P. gerstaeckeri (Dyb.) 1874 Gammarus g., B. Dybowsky in: Horae Soc. 
ent. Ross., v. 10 suppl. p. 108 t.14 f.5 | 1899 Plesiogammarus g., T. Stebbing in: Tr. 
Linn. Soe. London, ser. 2 ©.7 p.426 | 1898 Gammarus loeusta (part.)?, A. Della Valle 
in: F. Fl. Neapel, v.20 p. 928. 


Peraeon segments 1—7 and pleon segments 1—3 with clear marginal 
swellings, pleon segment 3 on upper surface and segments 4—6 on hind margin 
carrying a few tolerably long setae. Head with short rostral point, at the sides 
inflated over the eyes. Side-plates 1—4 small, regularly rounded below. Eyes 
of varying size and shape, usually reniform, more rarely roundish or punetiform, 
white. Antenna 1 as long as body or sometimes shorter, 4 times as long as 
antenna 2, pedunele stouter and somewhat longer than pedunele of antenna 2, 
18 joint stout, as long as 24 and 34 combined, flagellum 47-jointed, accessory 
flagellum 3- or 4-jointed. Antenna 2, ultimate joint of peduncle shorter 
than penultimate, thickened distally and there carrying a cirelet of plumose 


TOTER 


Plesiogammarus, Iphigenella 447 


setae, flagellum 4-jointed. Gnathopods 1 and 2, 5th joint short, 6'h slenderly 
oblong, in gnathopod 2 considerably larger than in gnathopod 1 and slightly 
widening at the palm, which in both is much shorter than the hind margin. 
Peraeopods 3—5, 24 joint narrow, almost rod-like, a little wider above than 
below, 4—5 times as long as broad, without setae on hind margin, while 
the 4th and 6t% joints of these limbs, the margins of peduncle in uropods 1 
and 2 and the lateral surfaces of the pleon segments are beset with numerous 
long setae. Uropod 1 reaching end of uropod 3 or somewhat beyond. 
Uropod 2 reaching scarcely °/, length of uropod 3. Uropod 3 of !/,;—"/, length 
of body, rami equal, beset with simple setae. Telson broader than long, divided 
beyond the middle but not nearly to the base, lobes with numerous apical 
setae. Colour yellow. L. reaching 16 mm. 


Lake Baikal. Depth 20—100 m. 


36. Gen. Iphigenella 0. Sars 


1896 Iphigenella (Sp. typ.: I. acanthopoda) (Iphigeneia O. Grimm in MS.), G. O. 
Sars in: Bull. Ae. St.-Pötersb., ser.5 v.4 p.478. 


Body almost smooth, robust, pleon segments 4 and 5 with a few dorsal 
hairs and a pair of subdorsal spinules, segment 6 with 2 pairs of spinules. 
Side-plates rather large, not setiferous. Antenna 1 the longer, with accessory 
flagellum. Mouth-parts nearly as in Gammarus (p. 460), but with inner lobes 
indicated inlower lip. Gnathopod 1 with short 5!" and large 6th joint. Gnathopod 2 
with 5tk and 6tk joints elongate, slender. Peraeopods 1—5 narrowly sub- 
chelate. Peraeopods 3—5 rather short and stout, .24 joint well expanded. 
Uropod 3 not very large, outer ramus much longer than pedunele, 2-jointed, 
inner ramus scale-like. Telson narrow, cleft to the base. 


1 species. 


1. L.acanthopoda O.Sars 1896 I.a, G.O.Sars in: Bull. Ac. St.-Pötersb., 
ser.5 ©.4 p.478 t.12 £. 1—17. 


Body moderately compressed. Pleon segments 4—6 slightly carinate. 
Head scarcely rostrate, lateral lobes obliquely truncate. Side-plates 1—4 
rather deep, 4tk the largest, much deeper than broad, emarginate, 5tk with 
front and hind lobes subequal. Pleon segment 3, postero-lateral corners 
acutely subquadrate. Eyes small, oval, dark. Antenna 1 more than U, a8 
long as body, pedunele shorter than in antenna 2, 1% joint longer than 
24 and 34 combined, flagellum twice as long as peduncle, 17-jointed, accessory 
flagellum 4-jointed. Antenna 2 rather stouter, ultimate and penultimate 
joints of pedunele subequal, flagellum little shorter than peduncle, 10-jointed. 
Gnathopod 1, 5tk joint short, cup-shaped, 6tk powerful, irregularly oval, 
widening to the rather oblique, sinuous palm, which is about equal to the hind 
margin and has a strong spine near the middle and 2 at the obtusely rounded 
palmar angle, finger long and faleiform. Gmathopod 2, 5tk joint long, a 
little wider and shorter than the sublinear 6%, both setose, palm transverse, 
extremely short, finger to match. Peraeopods 1 and 2 alike, rather slender. 
Peraeopods 3—5 subequal, shorter than peraeopods 1 and 2, 24 joint in 
. peraeopods 3 and 4 quadrangular oval, widest above, in peraeopod 5 obliquely 
expanded, produced below in a broadly rounded lobe. In all peraeopods the 
6 joint has a wide apex armed with stout spines, forming a kind of palm, 
against which the short, strongly curved finger impinges. Uropods 1 and 2, 


ER N EN ET 
BE ES a N 
F Kr. el Zu 


448 Iphigenella, Pandorites 


outer ramus shorter than inner, each with several spines at apex. Uropod 3 
projecting much beyond the others, outer ramus nearly thrice as long as 
peduncle, with 2 sets of spines on outer, 3 on inner margin, 24 joint spiniform, 
almost as large as the little inner ramus. Telson nearly twice as long as broad, 
lobes little tapering or divergent, each with 3 spinules on the obtuse apex. 
L. 9 mm. 


Caspian Sea. Sometimes on Astacus leptodactylus, probably semiparasitic. 


37. Gen. Pandorites 0. Sars 


1895 Pandorites (Sp. typ.: P. podoceroides) (Pandora (non Bruguiere 1797, 
Mollusea!) O. Grimm in MS.), G. O. Sars in: Bull. Ac. St.-Petersb., ser.5 v.3 p. 287. 


Body little compressed, smooth, pleon segments 4—6 short and stout, 
with a few dorsal hairs and spinules. Side-plate 4 the largest, only slightly 
emarginate. Eyes on lateral lobes of head. Antennae 1 and 2 slender, 
short, equal, antenna 1 with accessory flagellum. Upper lip rounded. Lower 
lip without inner lobes, and mouth-parts in general as in Gammarus (p. 460). 
Gnathopods 1 and 2 alike in S and in oO, very unequal, in gnathopod 1 
6'h joint small, ovately piriform, in gnathopod 2 very large, expanding to 
the long, oblique palm. Peraeopods 1—5 not very long. Peraeopod 5, 
24 joint much expanded, with produced lobe at lower hind corner. Uropod 3 
very small, outer ramus short, its 24 joint minute, inner ramus scale-like. 
Telson short, cleft to the base. 


l species, 


1. P. podoceroides ©. Sars 1895 P.p., G. O. Sars in: Bull. Ace. St.-Petersb., 
ser.5 v.3 p.287 t.19. 


In form - resembling a species of Ischyrocerus (p. 657), slender, 
with broadly rounded back. Head with angular front slightly projecting, 
lateral lobes evenly rounded, prominent; post-antennal corners acute, 
curving forward. Side-plate 1 small, narrowing distally, more setose than 
the rest, 4! almost square, but with convex lower and slightly concave hind 
margin. Pleon segments 2 and 3, postero-lateral corners smooth, quadrate. 
Eyes close to margin of lateral lobes of head, oval, dark. Antenna 1, 1° joint 
longer than 24 and 34 combined, 2 scarcely twice as long as 34, flagellum not quite 
as long as peduncle, 7-jointed, accessory flagellum small, 4-jointed. Antenna 2, 
ultimate joint of peduncle shorter than penultimate, flagellum 5-jointed. 
Gnathopod 1 setose, 5!" joint short, cup-shaped, 6% rather tumid, palm 
scarcely defined except by the palmar spines. Gmathopod 2 less setose, 
24 joint with very convex hind margin, 5% joint short, with short and narrow 
setiferous lobe, 6! somewhat flattened, palm longer than hind margin, much 
curved, very oblique, its edge sharpened and fringed with setules; of the 
palmar spines one very slender and long, finger long and faleiform. Peraeo- 
pods 1 and 2 very setose, 1° rather the longer. Peraeopods 3—5 rather 
strong, not elongate, 24 joint in peraeopod 3 oblong oval, in peraeopod 4 
longer, scarcely broader, narrowing distally, with sinuous hind margin; 24 joint 
in peraeopod 5 greatly expanded, widest below the middle, the obscurely 
serrate hind margin unarmed, its lower lobe not greatly produced downward, 
front margin densely setose below. Uropods 1 and 2 rather short and stout, 
rami subequal, each with apical spines, also 1 lateral spine, except on outer 
ramus of uropod 2. Uropod 3 reaching little beyond the others, outer ramus 
scarcely longer than peduncle, with 1 lateral and 2 apical spines, the tiny 


2 STE NE EEE FRTERE 


a 
AP 


449 


Pandorites, Pherusa 


24 joint tipped with setules, inner ramus less than '/, as long as outer, 
with 1 apical seta. Telson little longer than peduncle of uropod 3, broader 
than long, lobes not divergent, a spine and hair on each broad apex. L.o1l, 
S 13 mm. 


Caspian Sea. Depth 13—90 m. 


38. Gen. Pherusa Leach 


1813/14 Pherusa (Sp. un.: P. fueieola), Leach in: Edinb. Ene., v.7 p.432 | 1891 
‚P., A. O. Walker in: Ann. nat. Hist,, ser.6 v.7 p.418; v.8 p.81 | 1891 Pr; Pocock in: 
rt nat. Hist., ser. 6 v.7 p.550 | 1857 Gammarella (Sp. un.: @. orchestiformis), Bate 
in: Ann. nat. Hist., ser.2 v.19 p.143 | 1893 @., G.O. Sars, Crust. Norway, v.1 p. 446. 


Body smooth. Head without acute rostrum. Antenna 1 the longer, 
24 joint of peduncle elongate, accessory flagellum developed. Upper lip smoothly 
rounded. Lower lip with inner lobes. Mouth-organs normal. Mandibular palp 
slender, 24 and 34 joints elongate. Maxilla 1, inner plate with about 18 setae, 
outer with 11 spines. Maxilla 2, inner margin of inner plate fringed with setae. 
Gnathopods 1 and 2 subchelate. Gmnathopod 2 differing greatly in the two 
sexes. Peraeopods 1 and 2 slender. Peraeopods 3—5 with 24 joint expanded, 
especially in peraeopod 5. Uropods 1—-3 short. Uropod 3, outer ramus 
little longer than pedunecle, inner much shorter. Telson deeply cleft. 


1 species. 


1. P. fucicola Leach 1813/14 P. f., Leach in: Edinb. Ene., v.7 p.432 | 1816 
P.f., Leach in: Ene. Brit., ed.5 suppl.1 p.426 t.21 £. | 1862 P. f. (part.), Bate & 
Westwood, Brit. sess. Crust., v.1 p.255 f.z dorsal view | 1893 Melita f.. A. Della Valle 
in: F. Fl. Neapel, v.20 p.709 t.1 £.8; t.24 f. 1--19 | 1898 M. f., Sowinski in: Mem. 
Soe. Kiew, v.15 p.486 t.11 £.10—19; t.12 f.1—4 | 1830 Gammarus brevicaudus + 
Amphithoef., H.Milne Edwardsin: Ann. Sei. nat., v.20 p.369; p.377 | 1840 @. brevicaudatus, 
H. Milne Edwards, Hist. nat. Crust., v.3 p.53 | 1857 Amphithoe micrura + A. semi- 
carinata + G. obtusunguis (part.: 3 juv.) + @. punctimanus, A. Costa in: Mem. Ace. 
Napoli, v.1 p.209 t.3 £.2; p.210t.3 £.3; p.219.3f.8; p.222 t.3 f.6 | 1857 Gammarella 
orchestiformis, Bate in: Ann. nat. Hist., ser.2 v.19 p.143 | 1862 @. normanni (2), 
Bate & Westwood, Brit. sess. Crust., v.1 p.333 | 1862 @. brevicaudata + Gammarus 
Punctatus (laps., eorr.: G. punetimanus), Bate, Cat. Amphip. Brit. Mus., p. 180 t. 32 f.8; 
p- 224 | 1874 Gammarella b., T. Stebbing in: Ann. nat. Hist., ser. 4 0.14 p.13 t.2 f.3a—g | 
1888 G.b., T. Barrois, Cat. Crust. Acores, p.47 t.4 f.5—12 | 1889 @. b., A. M. Norman 
in: Ann. nat. Hist., ser.6 v.4 p.128 | 1885 @. longicornis, R. Koehler in: Bull. Soc. 
Naney, v.17 p. 67. 


Pleon abruptly depressed and abbreviated behind segment 4, which is 
more or less obtusely carinate but not at all dentate, segments 5 and 6 with 
a couple of minute dorsal spinules.. Eyes small, round, tinged with red. 
Antenna 1, 24 joint nearly as long as 1%, flagellum longer than peduncle, 
sometimes nearly twice as long, accessory flagellum with 4 tolerably long 
joints. Antenna 2 much shorter, slender, ultimate joint of peduncle rather 
shorter than penultimate, flagellum about 20-jointed, subequal to peduncle. 
Gnathopod 1, 6 joint shorter than 5tk, widening somewhat to the palm, 
which is almost transverse, matching the short finger. Gnathopod 2 in Q, 
6% joint longer than 5", not widening, palm short, transverse, finger short. 
Gnathopod 2 in J very unlike that of Q, 5tk joint very short, 6th very 
large, almond-shaped, narrowest at the finger-hinge, the long oblique palm, 
except in the young form, scarcely at all distinet from the hind margin, fringed 
with setae and carrying within the margin a.row of spinules, finger very 

Das Tierreich. 21. Lief.: T.R.R. Stebbing, Amphipoda I. 29 


450 Pherusa, Niphargoides 


large, curved, sometimes overlapping the whole length of the hand, but 
shorter in young d. Peraeopods 1 and 2, 4 joint scarcely dilated, longer 
than 5th, 5th than 6tk, Peraeopods 3 and 4, 24 joint moderately expanded, 
more above than below. Peraeopod 5, 24 joint very wide at the middle. 
Pleopods with many coupling spines on the peduncle. Uropods 1—3 reaching 
about equally far back. Uropod 3, outer ramus seemingly with minute 24 joint, 
inner scarcely half as long or half as wide as outer. Telson subquadrate, 
cleft about °/, of length, with spinule in each rounded apex. Colour yellowish 
brown. 1L.'7—12(?) mm. 

North-Atlantie (South-England, shore at very low tides; Channel Islands; Scotland, 
Firth of Clyde; France; Azores); Mediterranean; Bläck Sea. Down to 84 m. 


39. Gen. Niphargoides 0. Sars 


1894 Niphargoides (Sp. typ.: N. caspius), G. O. Sars in: Bull. Ac. St.-Petersb., 
ser.5 v.1 p.371. 


Akin to Pontoporeia (p. 127) and Gammarus (p. 460) ratherthan Niphargus 
(p. 405). Body. nearly smooth, robust. Head not rostrate. Side-plates 1— 4 
not very large, setiferous, 4!" the largest, excavate behind. Antennae 1 and 
2 short, subequal; antenna 1 with accessory flagellum usually more than 
l-jointed. Lower lip with inner lobes. Mandibular palp large. Maxillipeds, 
34 joint of palp slender. Mouth-parts otherwise as in Gammarus. Gnatho- 
pods 1 and 2 well developed, subchelate, 24 usually the stronger. Peraeopod 5, 
24 joint much more expanded than in peraeopods 3 and 4, hind margin, 
like the peraeopods in general, strongly setiferous. Uropods 1 and 2 with equal 
rami. Uropod 3 not very large, outer ramus much the larger, 2-jointed, 
inner ramus scale-like. Telson cleft to the base. 


7 species. 


Synopsis of species: 


Gnathopods 1 and 2, hind margin longer than palm 2. N. corpulentus. . p.451 


d Gnathopods 1 and 2, hind margin shorter than palm 3. N. ecompactus . . p.451 


Uropod 3, 2d joint of outer ramus rudimentary — 2. 
1 Uropod 3, 2d joint of outer ramus distinctly 
developed — 4, 
Gnathopods 1 and 2, 6th joint narrowing towards 
0 hs Da 7 Er 1. N. caspius. . . . p.450 
Gnathopods 1 and 2, 6th joint not narrowing towards 
the palm — 38, 


Uropod 3, 24 joint of outer ramus much shorter 
j Than DT FB 5 0 RE 4. N.grimmi. . . . p.452 


> 


| Uropod 3, 2d joint of outer ramıus not much shorter 
than inner ramus — 5. 

5 Lobes of telson strongly divergent. .. ... . 5. N. quadrimanus . p.452 
Lobes of telson not strongly divergent — 6. 

6 | Gnathopods 1 and 2 subequal. . ... 2... 6. N. aequimanus . p.453 
Gnathopod 1 considerably smaller than gnathopod 2 7. N. borodini . . . p.458 


1. N. caspius O. Sars 1894 N. ce. (Niphargus c. O. Grimm in MS.), G. O. Sars 
in: Bull. Ac. St.-Pötersb., ser.5 v.1 p.372 t.16. 


Body rather elongate, but robust and uncompressed, with only 2 dorsal 
spinnles on pleon segment 6. Head, lateral lobes rounded, little prominent. 


a re 


FRE EEE, OBERE 


Niphargoides 451 


Side-plates 1—4 densely setiferous, 1° not expanded distally. Pleon segments 2 
and 3, postero-lateral corners nearly quadrate, with a short oblique row of 
setules on outer surface, descending to the angle. Eyes not large, oval reniform, 
dark. Antenna 1 about '/, as long as body, 1° joint massive, much longer than 
24 and 34 combined, 24 about twice as long as 34, flagellum 7-jointed, 
accessory flagellum 3-jointed. Antenna 2 slightly longer, antepenultimate 
joint of peduncle stout, with densely setose angular projeetion below, ultimate 
joint shorter than penultimate, flagellum 5-jointed. Gnathopods 1 and 2 
similar, 5tk joint short, cup-shaped, 6! elongate, gradually tapering to the 
very oblique palm, which is much shorter than hind margin, and chiefly 
defined by 2 strong spines; gnathopod 2 much the larger. Peraeopods 1—5 
 densely setiferous, 1% and 24 with 4th joint large, widening distally, 39 and 
4th with 24 joint oblong oval, narrowing distally, peraeopod 5, 24 joint 
much more expanded, broadly oval, hind margin evenly curved. Uropods 1 
and 2, each ramus armed at apex with 4 blunt spines, and with 1 on the 
lateral margin. Uropod 3, pedunele with fringe of spines, outer ramus not 
twice as long as peduncle, rather broad, distal half fringed with plumose 
setae, 2 spines on outer margin, 24 joint minute; inner ramus shorter than 
peduncle, tipped with 1 spine. Telson, lobes rather divergent, each with 3 
spines on the obtusely truneate apex. L. 11 mm. 


Caspian Sea. Depth 66—75 m. 


2. N. corpulentus O.Sars 1895 N.c., G.O.Sars in: Bull. Ace, St.-Pötersb., 
ser.d5 v.3 p.275 t.17 f.1—19. 


oO unknown. — G. In general like N. caspius, differing as follows. 
Body more robust and with pleon segments 4—6. slightly raised dorsally, 
carrying a few small hairs, and with 2 subdorsal spinules on pleon segments 5 
and 6; side-plates 1—4 larger and less densely setiferous; pleon segment 2 
‘ without the oblique row of setules. Antenna 1, flagellum 8-jointed, accessory 
flagellum 4-jointed ; antenna 2 seareely longer, flagellum 6-jointed. Gnathopods 1 
and 2 less powerful, 6*% joint not tapering, but oblong quadrangular, with palm 
less oblique and defined by a distinet angle, carrying 2 or 3 unequal spines. 
Peraeopods 1 and 2, 5{k joint rather wider; peraeopod 3, 24 joint more 
regularly oval; peraeopod 4, 24 joint narrow, elongate, with the hind margin 
slightly sinuous; peraeopod 5, 24 joint greatly expanded, broadly heart-shaped, 
widest below, the long setae of the strongly curved hind margin springing 
from small serrations. Uropods 1 and 2, rami less blunt, with the spines 
more distributed; uropod 3, outer ramus about twice as long as peduncle, inner 
tipped with 2 spines, and carrying 3 setules on inner margin. Telson with 
lobes rather less divergent, each broad apex carrying 5 spines. L. 14 mm. 


Caspian Sea. Di 


3. N. compactus O0. Sars 1895 N. c., G. ©. Sars in: Bull. Ace. St.-Pötersb., ser. 5 
v.3 p. 278 1.17 £.14—19. - 


9 unknown. — d. Agreeing nearly with N.corpulentus. Body extremely 
robust and compact, peraeon segments 6 and 7 and pleon segments 1—3 
each with transverse dorsal furrow, pleon segment 5 carıying 2, segment 6 
having 4 subdorsal spinules. Side-plate1 distally expanded. Antenna 1, 24 joint 
more than thrice as long as 34, longer than the 9-jointed flagellum, accessory 

flagellum 4-jointed. Antenna 2, ultimate and penultimate joints of pedunele 

 eomparatively slender, flagellum very short, 6-jointed. Gnathopods 1 and 2 

similar, powerful, with piriform hand, thus differing in shape from those in other 
29* 


ee 


Bu 


452 Niphargoides 


species, the 6'% joint being very tumid at the base, the palm very oblique, well 
defined, much longer than the hind margin, gnathopod 2 much the larger, 
with the palmar angle more projecting; finger long, curved. Uropod 3, 
outer ramus nearly thrice as long as peduncle, sublaminar, fringed almost 
all round, 24 joint almost evanescent, inner ramus with 7 plumose setae 
a inner margin and 2 spines at apex. Telson with 4 spines at each apex. 
. 17 mm. 


North Caspian Sea. 


4. N. grimmi 0. Sars 1896 N. g., G. O. Sars in: Bull. Ac. St.-Pötersb., ser. 5 
v.4 p.A7L t.11 £.1-—12. 


Resembling N. taspius (p. 450). Appendages much less hirsute. Body 
robust, pleon segments 5 and 6 each with 2 dorsal spinules. Head, lateral 
lobes narrowly rounded. Side-plates I—4 fringed with rather short setae. Pleon 
segment 2, postero-lateral corners quadrate, segment 3, postero-lateral corners 
acutely produced, with a few setules on the margin. Antenna 1, flagellum 
5-jointed, accessory flagellum 2-jointed, the 24 joint minute. Antenna 2 
not longer, flagellum 3-jointed. Gnathopods 1 and 2, 6% joint rather elongate, 
oblong, slightly widening to the palm, which is not very oblique, well defined, 
with 2 palmar spines, one of them very long; gnathopod 2 nearly twice 
as large as gnathopod 1. Peraeopod 3, 24 joint piriform. Peraeopod 4, 
24 joint little widened, hind margin sinuous. Peraeopod 5, 24 joint greatly 
expanded, little longer than broad, widest at about the middle, fringed 
behind with hair-like setules. Uropod 3, outer ramus with fringing setae 
not close set, 24 joint very small, but well defined and obvious, inner ramus 
nearly as long as peduncle, tipped with 2 spines. Telson rather longer 
than broad, lobes little divergent, 4 spines on each apex. L. 8 mm. 


Caspian Sea. Depth 47—169 m. 


5. N. quadrimanus O. Sars 1895 N.gq., N. quadrimanus, G.O.Sars in: Bull. ° 


Ace. St.-Petersb., ser.5 v.3 p.281; t.18 f. 1—18. 


Body not very robust, somewhat compressed, pleon devoid of subdorsal 
spinules. Head, lateral lobes broadly rounded. Side-plate 1 scarcely expanded 
distally, 4!" about as wide as deep. Pleon segment 3, postero-lateral eorners 
quadrate, with no oblique row of setules. Eyes rather small, oval reniform, dark. 
Antenna 1, 1° joint twice as long as 24 and 34 combined, 24 twice as long as 34, 
flagellum about 11-jointed, accessory flagellum 6-jointed. Antenna 2 equal to 
antenna l, peduncle geniculate between antepenultimate and penultimate joints, 
both of which are expanded below to setiferous lobes, ultimate joint nearly as 
long as penultimate, both spiniferous, flagellum 10-jointed. Gmnathopods 1 
and 2, 6tk joint oblong quadrangular, palm not very oblique, defined by a 
distinet angle armed with 3 unequal spines; in gnathopod 1 the hand inelines 
to oval, but in the larger gnathopod 2 its great breadth, encreasing slightly 
towards the palm, gives it an almost square appearance. Peraeopods I and 2, 
4th joint large, setiferous chiefly on hind margin, 5tb joint not much expanded, 


6, as usual in the genus, linear. Peraeopod 3, 24 joint regularly oval. 


Peraeopod 4, 24 joint much longer, and below narrower, hind margin sinuous. 
Peraeopod 5, 24 joint greatly expanded, greatest width near distal end, hind 
margin fringed with short setae, lower front angle and 4 and 5tk joints, 
as in peraeopod 4, very hirsute. Uropods 1 and 2,.rami subequal, each with 
5 apical spines and one lateral spine. Uropod 3 projecting far beyond the 
others, outer ramus with 2 sets of spines on outer margin, fringing setae 


Dh u" | ul an ud nl ra a a | 


Niphargoides, Phreatogammarus 453 


scattered and simple, 24 joint not much shorter than inner ramus, which has 
2 apical spines. Telson rather small, lobes strongly divergent, each with 1 


apical spinule. L. 10 mm. 


Caspian Sea. Depth 13—37 m. 


6. N. aequimanus 0. Sars 1895 N. a., N. aegvimanus, G. O. Sars in: Bull, 
Ae. St.-Petersb., ser.5 v.3 p.285; t.18 f. 14—23. 


Resembling N. quadrimanus. Lateral lobes of head narrowly rounded. 
Side-plate 1 distally widened. Antenna 1, flagellum 7-jointed, accessory flagellum 
5-jointed; antenna 2, flagellum 7-jointed. Gnathopods 1 and 2 nearly equal, 
as well as similar, 6t joint oblong quadrangular, palm nearly transverse, 
much shorter than hind margin. Peraeopods 3 and 5, 24 joint almost as broad 
as long, the setae on hind margin in peraeopod 5 fewer than in N. quadrimanus. 
Uropods 1 and 2 without the lateral spine; uropod 3 with more elongate 
ramus, thrice as long as pedunele, inner ramus with 1 apical spine. Telson 
with broader lobes, not divergent, 2 unequal spinules on each apex. L. 5 mm. 


Caspian Sea. Depth 19 m. 


7. N. borodini 0. Sars 1897 N.b., G. O. Sars in: Annuaire Mus. St.-Petersb.,” 
0.2 P.290 1.15 £.4—9. 


QO. Body somewhat elongated, back broadly rounded, quite smooth. 
Head, lateral corners produced, narrowly rounded. Side-plates I1—4 com- 
paratively large, 1° not distally widened, 4!" deeper than wide. Pleon seg- 
ment 3, postero-lateral corners subquadrate, with no oblique row of setules. 
Eyes not very large, oval reniform, dark. Antenna 1, 1° joint very large, 
twice as long as 24 and 34 combined, distally rather narrowed, flagellum 
not half as long as peduncle, 8-jointed, accessory flagellum 6-jointed. 
Antenna 2 as long as antenna 1, antepenultimate and penultimate joints 
of peduncle with setiferous lobes, ultimate joint linear, nearly as long as the 
.9-jointed flagellum. Gnathopods 1 and 2 strong, 3?—5tk joints short, 6!" large, 
tending to quadrate in form, but widening distally to a somewhat oblique palm, 
defined by a spiniferous obtuse point; hand, palm, and finger considerably 
larger in gnathopod 2 than in gnathopod 1. Peraeopods I—5 and uropods 1 
and 2asin N. quadrimanus. Uropod 3 projeceting much beyond the others, outer 
‚ramus more than twice as long as peduncle, 1° joint spinose, 2% longer than the 
scale-like inner ramus, setose all round, inner ramus with 3 apical spines. 
Telson with oblong oval lobes, scarcely divergent, each with 3 spinules on 
blunt apex. L. 13 mm. — d unknown. 


Caspian Sea. 


- 


40. Gen. Phreatogammarus Stebb. 


1899 Phreatogammarus (Sp. typ.: P. fragilis), T. Stebbing in: Tr. Linn. Soe. 
London, ser.2 v.7 p». 427. 


Near to Gammarus (p. 460). Without eyes. Upper. lip broader than 
deep. Mandible, 1° joint of palp not very short. Gmathopods 1 and 2 
equal. Peraeopods 1 and 2 much shorter than peraeopod 3, peraeopod 5 the 
longest, with its 6!" joint longer than any of the other joints. Uropod 3 
long, with equal 1-jointed eylindrical rami. 


l species. 


454 Phreatogammarus, Ommatogammarus 


1. P. fragilis (Chilton) 1882 Gammarus f., Chilton in: N. Zealand J. Sei. 
v.1 p.44 | 1882 @. f., Chilton in: Tr. N. Zealand Inst., ©. 14 p. 179 t.9 f. 11—18 | 1889 
@. f., Moniez in: Rev. biol. Nord France, v.1 p.253 | 1890 @. f., Wrzesniowski in: Z. 
wiss. Zool., v.50 p. 611, 698 | 1894 @. f., Chilton in: Tr. Linn. Soc. London, ser.2 ®.6 
p. 227 t.21 f.1—25 | 1899 Phreatogammarus f., T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 v.7 p.427 | 1893 Gammarus flwviatilis (part.), A. Della Valle in: F. Fi. Neapel, 
v.20 p. 768. 

Body rather slender; pleon segments 4—6 each with 4 or 5 dorsal long 
spine-like setae. Head without rostrum, lateral angles broadly rounded, little 
produced. Side-plates rather shallow. Pleon segments 2 and 3 with postero- 
lateral angles blunt. Antenna 1 subequal to body, 1° joint long, not quite as 
long as 24 and 3X combined, flagellum many-jointed, more than twice as long as 
peduncle, accessory flagellum 6—9-jointed. Antenna 2 more than half as long as 
antenna 1, ultimate joint of pedunele slightly longer than penultimate, flagellum 
subequal to pedunele, about 20-jointed. Upper lip nearly semieircular, much 
broader than deep. Lower lip without inner lobes. Mandible, 1° joint of palp 
nearly halfaslong as 24, distally a little widened. Gnathopods 1 and 2 in Q rather 
large, 6% joint ovate, palm very oblique, finger long, curved. Peraeopods 1 
and 2 slender. Peraeopods 3—5 long, 24 joint not very wide, narrowing 
downward, finger small. Peraeopods 4 and 5 with 6!" joint much the longest. 
Peraeopod 5 nearly as long as body. Uropod 3 extending much beyond the 
‚others, the rami about twice as long as peduncle, scarcely tapering, each with 5 
groups.of 3 spines and an apieal group of 6 or 7 spines. Telson short, the 
lobes almost rectangular, each with 4 or 5 spines on the obtusely truncate apex 
and 2 or 3 a little above on outer margin. Colour white, semitransparent. 
L. reaching 15 mm. 


New Zealand. Wells. 


41. Gen. Ommatogammarus Stebb. 
1899 Ommatogammarus, T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p.427. 


Near to Gammarus (p. 460). Dorsal spines only on pleon segments 
4—6. Eyes irregular, with indented outline (Fig. 86). Antenna 1 the longer, 
but with pedunele usually shorter than that of antenna 2; accessory flagellum 
of more than 1 joint (Fig. 86). Upper lip narrowed to a rounded apex. 
Lower lip, inner lobes rudimentary. Mandible, 34 joint of palp not very 
elongate. Maxilla 1, inner plate fringed with numerous setae, outer carrying 
11 spines, 24 joint of palp with about 10 spine-teeth on one maxilla and 
short spines on the other. Maxillipeds, outer plates reaching far along 
24 joint of palp, spine-teeth and setae numerous. Gnathopod 1, 6fk joint 
‘not smaller than that of gnathopod 2. Uropod 3, outer ramus about twice 
as long as inner, with simple setae on its outer margin, inner ramus with 
feathered setae on both margins. Telson cleft to the base. 


4 species. 
Synopsis of species: 


| Dorsal margin of head abruptly bent downward — 2. 
1 | Dorsal margin of head not abruptly bent down- 


ward — 3. 
9 j Eyes with hind margin acutely indentured ... . 1. O.albinus. . . . p.455 
\ Eyes with hind margin obtusely lobed .... . . 2. O.Bavus .. ..p.455 
3 | ya ed HS RN ae 3. O. carneolus.. . . p.456 


UÜEyen mare an 4. O. amethystimus . p. 456 


Ommatogammarus 455 


1. O. albinus (Dyb.) 1874 Gammarus a., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.71 t.9 f.3 | 1899 Ommatogammarus a., T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 v.7 p.427 | 1898 Gammarus flwviatilis (part.)?, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 9297. 


Dorsal spines on pleon segments 4—6 very delicate, and solitary 

at the places corresponding to lateral groups. Head abruptly bent down- 
ward, the dorsal line being connected by a short eurve with a frontal 
part at right angles to it. Eyes deep, celosely adjoining the upright front 
of head, front margin slightly concave (Fig. 86), hinder cut into very unequal 
lobes, some of which are acute, clear flesh-coloured or white with a dash of rose- 
red. Antenna 1 (Fig.86) about '/, as long as body and twice as long as antenna 2, 
peduncle rather shorter (or in Q sometimes a ORTE 

little longer) than peduncle of antenna 2, er atEirgen 
1° joint thick, longer than 24 and 34 combined, ' 

flagellum 3 or 4 times as long as the short 

pedunele, 38-jointed, accessory flagellum 6—8- 

jointed. Antenna 2 (Fig. 86), ultimate and pen- 

ultimate joints of peduncle subequal, flagellum : 
10—-13-jointed. Gnathopod 1, 6th joint piri- ee, 
form, very broad at base, hind margin much [After B. Dybowsky.) 
shorter than the very oblique but well defined 

palm. Gmnathopod 2, 5tk and 6tk joints longer and more slender than 
in gnathopod 1, 6tk joint oblong, but gradually widening to the ‘oblique 
palm, which is shorter than hind margin. Peraeopods 3—5, 24 joint with 
convex hind margin but narrowed near the distal end, where it forms a 
free angle. Uropods 1 and 2 reaching the second third of uropod 3. Uropod 3, 
outer ramus about twice as long as inner, 24 joint distinet. Colour more or less 
yellowish white. L. 28 mm. 


Lake Baikal. Depth 300- 1300 m. 


2. O. flavus (Dyb.) 1874 Gammarus f., B. Dybowsky in: Horae Soe. ent. Ross., 
v.10 suppl. p.72 t.9 £.1 | 1899 Ommatogammarus f., T. Stebbing in: Tr. Linn, Soe. 
London, ser.2 v.7 p.427 | 1893 Gammarus fluviatilis (part.)?, A. Della Valle in: F. Fl. 
Neapel, v.20 p. 928. 


Dorsal spines very delicate, on pleon segments 4 and 5 in 4 little groups, 
on segment 6 only in 2, spines in a group varying between 1 and 3. Head bent 
at right angles as in O. albinus, but the connecting curve larger. Pleon 
segments 2 and 3, postero-lateral corners acutely produced. Eyes very large, 
oceupying nearly half the surface of head and nearly meeting at top, front 
margin closely adjoining upright front of head, hind margin divided into 
small rounded lobes, lower straight or alittle concave, black or, in specimens from 
a great depth, reddish. Antenna 1 about '/, as long as body, in GC less, in © more, 
than twice as long as antenna 2, pedunele shorter than peduncle of antenna 2 
(or in O sometimes a little longer), flagellum 3 or 4 times as long as peduncle, 
35—43-jointed, accessory flagellum 4- or 5-jointed. Antenna 2, ultimate and 
penultimate joints of peduncle subequal, flagellum 13—19-jointed. Gnathopod1, 
6'h joint described as slenderly piriform, but rather oblong, the hind margin 
being considerably longer than the oblique, very concave palm, which is 
armed with a strong spine at the centre. Gnathopod 2, 5% joint rather longer 
than in gnathopod 1, 6% oblong, considerably shorter but nearly as broad 
as in gnathopod 1, hind margin slightly indented near the short, concave, 
nearly transverse palm. Peraeopods 3—5, 24 joint narrower than in O.albinus, 


i 
€ 
. 

: 1. R 
» 


456 Ommatogammarus, Odontogammarus 


the hind margin at the narrowed distal end not forming a free angle. Uropod 1 
reaching end of inner ramus of uropod 3. Uropod 3, outer ramus broad, about 
twice as long as the narrow inner one, 24 joint indistinet. Colour yellow 
to clear honey-yellow. L. 30 mm. 


Lake Baikal. Depth 100—1300 m. 


3. O. carneolus (Dyb.) 1874 Gammarus c., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.73 | 1899 Ommatogammarus c., 'T. Stebbing in: Tr. Linn. Soe. 
London, ser. 2 0.7 p.427 | 1893 Gammarus flwiatilis (part.)?, A. Della Valle in: F. Fl. 
Neapel, v.20 p. 928. 


Dorsal spines of pleon segments 4—6 arranged as in O. amethystinus. 


Eyes large, unique in form, like the capital letter B reversed, with 2 great 
lobes in front, the hinder and lower margins being also broken up into lobes, 
ruby-red. Antenna 1 more than '/, as long as body, nearly twice as long as 
antenna 2, peduncle shorter than peduncle of antenna 2, flagetlum 3 or 4 times as 
long as pedunele, 31 —45-jointed, accessory flagellum 4- or 5-jointed. Antenna 2, 
flagellum 11—15-jointed, peduncle and flagellum elosely beset with simple 
setae, which are sometimes longer than the flagellum itself. Gnathopod 1, 


6th joint slender, piriform; gnathopod 2, 6tk joint oblong; in both gnatho- 


pods pretty closely covered with setae often exceeding the length of the 
joint. Uropod 1 not reaching the middle of uropod 3. Uropod-3, outer ramus 
about twice as long as inner. Colour flesh-red, variable in intensity. L. 18 mm. 


Lake Baikal. Depth 300—700 m. 


4. O. amethystinus (Dyb.) 1874 Gammarus a., B. Dybowsky in: Horae Soc. 
ent. Ross., v.10 suppl. p.74 t.9 £.6 | 1899 Ommatogammarus a., T. Stebbing in: Tr. 
Linn. Soe. London, ser.2 0.7 p.427 | 1898 Gammarus flwviatilis (part.)?, A. Della Valle 
in: F. Fl. Neapel, v.20 p. 927. 


Dorsal spines very delicate, 1 or 2 on the obsceure elevations of the 
hind margins of pleon segments 4 and 5, corresponding to middle and lateral 
groups, segment 6 having only 2 spinules. Dorsal line of head slightly convex, 
rostral point depressed. Eyes small, narrow, hind margin broken up into 
lobes, reddish or bright rose-red to whitish red. Antenna 1 ?/,—?/, aslong as body, 
nearly twice as long as antenna 2, peduncle shorter than peduncle of antenna 2, 
flagellum 3 or 4 times as long as peduncle, 35 —62-jointed, accessory flagellum 4- 
or 5-jointed. Antenna 2, ultimate and penultimate joints of peduncle subequal, 
flagellum 12—16-jointed. Gnathopod 1, 6t% joint slenderly. piriform, the 
concave palm forming a sinuous line with the hind margin. Gnathopod 2, 
5th joint decidedly longer than that of gnathopod 1, 6" evenly oblong, shorter 
than that of gnathopod 1, but scarcely narrower than its widest part. Peraeo- 
pods 3—5, 24 joint with convex hind margin produced below to a rather long 
obtusely ending process. Uropod 1 reaching middle of uropod 3. Uropod 3, 
outer ramus about twice as long as inner, its 24 joint distinet. Colour amethystine 
to bluish red. L. 24 mm. 


Lake Baikal. Depth 500—1300 m. 


42. Gen. Odontogammarus Stebb. 
1899 Odontogammarus, T. Stebbing in: Tr. Linn. Soe. London, ser. 2 0.7 p.427. 


In general like Gammarus (p. 460). Lower front angle of side-plate 5 
forming a tooth. Peduncle of antenna 1 not shorter than peduncle of antenna 2, 
34 joint as long as 24, Gmathopod 1, 6" joint not smaller than that of 


4, Du = Ed nn en 


un 


TEE TEREIRL ANREGEN 


j 
En 
# 
. 

: 

F 
. 
‚4 

bi 


3 
a 
& 

h 
h 
# 

= 3 3 


ae REN as Dana aaa Zn 2 u alien li nt. 


Odontogammarus 457 


gnathopod 2. Peraeopods 3—5, 24 joint produced at lower hind angle into 
a tooth. Uropod 3 not very long, the 2-jointed outer ramus (as in Gammarus) 
longer than the inner. 


2 species. 
Synopsis of: species: 


In side-plate 5 the tooth bent slightly outward. . . . 1. O.calcaratus. . . p.457 
In side-plate 5 the tooth direeted straight downward . 2. O. margaritaceus . p. 457 


1. O. calcaratus (Dyb.) 1874 Gammarus ce., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.54 t.7 f.4 | 1893 @. ce. (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p.759 | 1899 Odontogammarus c., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 
v.7 p. 427. 


Pleon segments 4 and 5 each with 3 little groups of dorsal spines 
on hind margin, segment 6 with 2 little groups, 2 or 3 spines to a group. 
Side-plate 5 in front half produced far down in a tooth-like angle, bent 
slightly outward from the body, the hind angle little prominent so that to 
the rear the lower margin forms almost a straight line; side-plate 6 in front 
half produced over 24 joint of peraeopod 4, slightly pointed, not forming a 
tooth; side-plate 7 rounded in front. Eyes small, reniform, black. Antenna 1 
rather more than '/, as long as body and twice as long as antenna 2, peduncle 
as long as or a little longer than pedunele of antenna 2, 1° joint scarcely 
longer and 2% perhaps a little shorter than 34, flagellum twice as long as 
peduncle, 45—62-jointed, accessory flagellum 8—10-jointed. Antenna 2, 
ultimate joint of pedunele longer than penultimate, flagellum shorter than 
peduncle, 22-jointed, with calceoli in d. Characters of gnathopods 1 and 2, 
6% joint differing in text and figure. Peraeopods 3 and 4, 24 joint with front 
margin very convex, much more so than in peraeopod 5, in all the hind. 
margin is slightly concave, ending below with a long tooth-like angle, 
reaching far over the 34 joint (wanting in young from the brood pouch). 
Uropod 1 reaching nearly to the middle of uropod 3. Uropod 3, 24 joint 
of outer ramus about '/, of 1° joint, inner ramus °/, as long as outer, 
both with plumose setae on both margins. Colour dorsally greenish yellow, 
iridescent, on sides dark yellow, here also nacreous. L. 36 mm (including 


'6 mm for uropod 3). 


Lake Baikal. Depth 50—100 m. 


2. O. margaritaceus (Dyb.) 1874 Gammarus m., B. Dybowsky in: Horae 
Soe. ent. Ross., v.10 suppl. p.21,56 | 1899 Odontogammarus m., T. Stebbing in: Tr. 
Linn. Soc. London, ser.2 v.7 p.427 | 1893 Gammarus calcaratus (part.)?, A. Della Valle 
in: F. Fl. Neapel, v.20 p. 929. 


Like O. cealcaratus, but head more convex and in front more obtuse; 
side-plate 5 deeper, with front and hind angles nearly equally long, running 
out into triangular pointed lappets, of which the front one is somewhat the 
sharper and longer; side-plate 6, with front corner rounded, hind one produced 
acutely downward. Eyes irregularly linear-reniform, with broken hind margin, 
wbite, scarcely or notat all visible in spirit. Antenna 1, flagellum 53—63-jointed, 
accessory Hagellum 7-jointed; antenna 2, flagellum 19—-27-jointed. Peraeo- 
pods 3—5, 24 joint broader, with hind corner more weakly developed. Uropod 3 
shorter, but inner ramus relatively longer, outer margin of outer ramus without 
plumose setae and its 24 joint diminutive. Colour bright yellowish playing 
into bluish. 


Lake Baikal. Depth 150—1000 m., 


ER a ae ee eb 
ir u RL TE SR 


458 Dikerogammarus 


43. Gen. Dikerogammarus Stebb. 
1899 Dikerogammarus, T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p. 428. 


Agreeing in general with Gammarus (p. 460). Pleon segments 4 and 5 
each raised dorsally to a spiniferous tuberele. Antenna 1 the longer, accessory 
flagellum well developed. Gnathopods 1 and 2 larger in S than in oO, 
24 larger than 1%, 


5 species. 


Synopsis of speeies: 


1 Uropod 3, rami very unequal — 2. 
Uropod 3, rami not very unequal — 4. 
Head arched longitudinally . . ».. 2.2.2... 1. D. macrocephalus . p. 458 
Head not arched longitudinally — 8. 
8 2! Peraeopods 3—5, 2d joint not very broadly ex- 

nn RE a Re 8. D. erimm# . . 5 °.)% p- 459 
Gnathopod 2 much larger than gnathopod 1 . 4. D. verreauxi . . . p.459 


Gnathopod 2 not much larger than gnathopod 1 5. D. fasciatus. . . . .p.460 


Peraeopods 3—5, 2d joint broadly expanded . ED haemobaphes. . p. 458 
4} 
\ 


1. D. macrocephalus (O. Sars) 1896 Gammarus m., G. O. Sars in: Bull. Ace. 
St.-Pötersb., ser.d v.4 p.453 t.7 f.1—11 | 1899 Dikerogammarus m., T. Stebbing in: 
Tr. Linn. Soe. London, ser.2 v.7 p. 428. a 


Body robust, back smoothly rounded, except pleon segments 4 and 5, 
tuberele of pleon segment 4 tipped with 4, of segment 5 with 2 spines; 
segment 4 without lateral spines, segment 5 left doubtful, segment 6 with 
2 on each side at base of telson. Head large, dorsal surface strongly vaulted, 
with peculiar areolated appearance from points of insertion of strong muscles 
eonverging to the mouth area. Side-plates not particularly large. Pleon 
segment 1, postero-lateral corners rounded, in segments 2 and 3 acutely 
produced. Eyes very small, distinctly reniform. Antenna 1 slender, not 
half as long as body, 1% joint as long as 24 and 34 combined, flagellum 
about 27-jointed, accessory flagellum 6-jointed. Antenna 2 stronger, rather 
setose, flagellum 10-jointed. Gnathopods 1 and 2, 6% joint oblong oval, 
in gnathopod 2 (at least in J) fully twice as large as in gnathopod 1, in 
both palm oblique, well defined, rather shorter than hind margin. Peraeo- 
pods 1—5 .rather slender, not very long. Peraeopods 3 and 4, 24 joint 
wider above than below, hind margin sinuous. Peraeopod 5, 24 joint much 
larger, broadly oval, hind expansion produced below to an obtusely pointed 
lobe. Uropods 1 and 2, rami subequal, not long, with apieal groups of 
spines, and here and there a lateral spine. Uropod 3 reaching far beyond 
the others, peduncle short, outer ramus long, sublinear, fringed densely all 
round with slender setae, and having 3 groups of spines on each margin, 
24 joint minute; inner ramus little over */;, as long as peduncle. Telson 
broader than long, each lobe having 3 spinules on narrowly truncate apex 
L. © 24 mm. 


Caspian Sea. Depth 66 m. 


2. D. haemobaphes (Eichw.) ?1771 Oniscus pulex, Cancer p. (err., non Linne 
1758!), Pallas, Reise Ruß., v.1 p.477 | 1841 Gammarus haemobaphes, Eichwald in: N. 
Me&m. Soc. Moseou, ©.7 p.230 t. 87 £.7a—c | 1899 Dikerogammarus h., T. Stebbing in: 
Tr. Linn. Soc. London, ser.2 v.7 p.428 | 1894 Gammarus h. + G. robustoides (@. aralo- 


EEE er - 


Dikerogammarus 459 


caspius ©. Grimm in MS.), @. ©. Sars in: Bull. Ae. St.-Pötersb., ser.5 ©o.1 p.215 t.8; 
p.358 1.12 | 1862 @. caspius (non Oniscus e. Pallas 1771!), Bate, Cat. Amphip. Brit. 
Mus,, p. 214 t.38 f.3 | 1875 @. aralensis, Uljanin in: Fedtschenko, Turkestan, Crust. 
p.1t.5£15. 


Very like D. macrocephalus, differing in the following points. Pleon 
segments 4 and 5, dorsal conical tuberele rather smaller, each with 2 apical 
spines, segment 4 with a spinule also on each side. Head normal. Pleon 
segment 3, postero-lateral eorners rather quadrate than acutely produced. 


Eyes well developed. Antenna 1, accessory flagellum 7—9-jointed. Antenna 2, 


flagellum about 8-jointed. - Peraeopods 3—-5 rather stout. Peraeopod 3, 


. 24 joint broader above than below, but nearly quadrangular, lower hind angle 


slightly produced. Peraeopod 4, 24 joint much more expanded above than 
below. Uropod 3, outer ramus with 1 group of spines on inner margin, the 
small inner ramus more than half as long as the short peduncle. Telson 
with only 1 or 2 apical spines on the very narrow apex of each lobe. Colour 
brownish green, hind margins of segments laterally tinged with pink; eyes 
dark. L. 9—16 mm. 


Black Sea; Caspian Sea (shore to 75 m). 


3. D. grimmi (O0. Sars) 1896 Gammarus g., G. O.Sars in: Bull. Ac. St.-Petersb., 
ser.d v.4 p.448 t.6 f.1—10 | 1899 Dikerogammarus g., T. Stebbing in: Tr. Linn. Soe. 
London, ser.2 v.7 p. 428. 


Very like D. haemobaphes. Body rather slender. Pleon segments 
4 and 5, tuberele very prominent, narrow, on segment 4 tipped with 4 spines 
and flanked by 2 unequal spines on each side, on segment 5 tipped with 
only 2 spines, segment 6 carrying 3 spines on each side. Pleon segment 3, 
postero-lateral corners acutely produced. Eyes oblong oval, scarcely reniform, - 
usually dark, but variable. Antenna 1, accessory flagellum 7-jointed. Gnathopods 
1 and 2 still more unequal in J than in ©, gnathopod 2 in JS very large, 
6! joint very tumid at the base. Peraeopods 1—5 rather slender, 24 joint 
in peraeopodgs 3—5 conspicuously narrower than in D. haemobaphes, in 
peraeopod 5 this joint becoming oblong quadrangular, with nearly straight, 
much serrate hind margin, produced to a narrowly rounded lobe. Uropod 3, 
outer ramus very long and narrow, fringed with setae, but without conspicuous 
spines; inner ramus about half as long as peduncle, almost spine-like in 
narrowness. Telson with 2 spinules on each obtusely pointed apex. L. C 27 mm. 


Caspian Sea. Depth 66—203 m. 


4. D. verreauxii (Bate) 1862 Gammarus v., @. verrauxü, (H. Milne Edwards 
in MS.?) Bate, Cat. Amphip. Brit. Mus., p.210 t.37 f.5 | 1899 Dikerogammarus verreauxü, 
T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p.428-+ 1895 Gammarus locusta 
(part.)?, A. Della Valle in: F. Fl. Neapel, ©.20 p. 768. 


Pleon segments 4 and 5 with dorsal tubercles (without spines in figure). 
Eyes ovate. Antenna 1 about '/, as long as body, flagellum shorter than 
pedunele. Antenna 2 shorter, peduncle not longer than in antenna 1. 
Gnathopod 2 twice as long’ as gnathopod 1, 6tk joint long ovate, tapering, 
palm the entire length of the inferior margin, straight, finger (im figure) very 
long. Peraeopods 3—5 not very unequal, 24 joint not much dilated, narrowed 
below (in figure). Uropod 2 considerably shorter than uropod 1, uropod 3 
a little longer (reaching a little further?) than uropod 1, rami equal. L. 37 mm. 


New Holland. 


460 Dikerogammarus, Gammarus 


5. D. fasciatus (Say) 1818 Gammarus f., Say in: J. Ac. Philad., ve. 1ır p. 874 | 
1830 @. f., H. Milne Edwards in: Ann. Sci. nat., v.20 p. 367 | ?1862 @. f., Bate, Cat. 
Amphip. Brit. Mus., p. 210 t.37 f.6 | 1874 @. f., 8S.I. Smith in: Rep. U. S. Fish Comm., 
v.2 p.653 | 1899 Dikerogammarus f., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 
0.7 p. 428. 


Pleon segments 4 and 5 slightly angulated dorsally at hind margin, 
each armed with 3 fascieles of spines, the median raised on a distinet protu- 
berance, segment 6 also with 3 fascieles.. Antenna 1, 2% joint surrounded 
with long setae, which reach the 5tk joint of flagellum, accessory flagellum 
5- or 6-jointed. Antenna 2 setose. Gmnathopod 1 in JS, 6tk joint much 
narrowed distally, palm very oblique, defined from the spineless hind margin 
by small spines, and having a stout spine at the middle, in Q only slightly 
narrowed distally, palm less oblique. Gnathopod 2 in JS, 5tk joint rather 
longer than in gnathopod 1, 6! with margins nearly parallel, but widening 


a little to the palm, which is a little oblique, slightly concave, with a lamellar 


edge, carrying a stout spine near the middle, and defined by groups of small 
spines; in 9 5*k joint proportionally longer, as wide as the narrow, parallel- 
sided 6!4, which has a short, nearly transverse palm. Uropod 3, inner ramus 
usually with 1 or 2 spines on the inner margin. Telson, each lobe with a 
spine and 1 or 2 hairs on outer margin as well as a ı few spines and hairs 
at the apex. L. 10—15 mm. 


Northern United States of America. Streams and ponds. 


44. Gen. Gammarus F. 


1758 Cancer (part.), Linne, Syst. Nat., ed. 10 p.625 | 1775 Gammarus (part.), 
J. C. Fabrieius, Syst. Ent., p.418 | 1813/14 @., Leach in: Edinb. Ene., 0.7 p.402, 482 | 
1862 @., Bate, Cat. Amphip. Brit. Mus., p. 203 | 1874 @. (part.), B. Dybowsky in: Horae 
Soe. ent. Ross., v. 10 suppl. p.19 | 1876 @., A. Boeck, Skand. Arkt. Amphip., «.2 p. 364 | 
1886 G., Gerstaecker in: Bronn’s Kl. Ordn., v.5rı p.5ll | 1888 @., T. Stebbing in: 
Rep. Voy. Challenger, v.29 p. 1005, 1673 | 1893 @., A. Della Valle in: F. Fl. Neapel, 
v.20 p.756 ! 1894 @., G. O. Sars, Crust. Norway, v.1 p.496 | 1793 [Subgen.]) Gammarellus 
(part.), J. F. W. Herbst, Naturg. Krabben Krebse, v.2 p. 106. 

Body without carinae, teeth or tubereles; dorsal spinules generally in 
median and lateral groups on pleon segments 4—6, but sometimes wanting on 4*h 
or on both 4tk and 5t". Head without conspieuous rostrum. Side-plates 1—4 
usually rather deep. Eyespresent. Antenna 1 almost always longer than antenna 2, 
though with shorter pedunele, accessory flagellum almost always with more 
than one joint. Antenna 2, flagellum not- or little longer than peduncle. 
Upper lip as broad as deep, faintly emarginate at apex. Lower lip without 
inner lobes. Mandible normal. Maxilla1 (Fig.87 p.476), inner plate with several 
setae, outer with (11?) more or less serrate spines, 24 joint of palp with 
spine-teeth on the apex of one maxilla and slender spines on the other. 
Maxillipeds normal. Gnathopods 1 and 2 subchelate, stronger in J than 
in Q, gnathopod 2 usually the larger, in the JS often much the larger. 
Peraeopods 3—5, 24 joint variable, much or little expanded. Branchial 
'vesicles simple, with narrow attachment. Uropod 3, outer ramus usually 
long and having a small 24 joint. Telson cleft, usually to the base. 

30 accepted species, 1 doubtful. 


Synopsis of accepted species: 


Antenna 1, accessory flagellum of more joints 


| Antenna 1, accessory flagellum of only one joint 1. G.guernei. . . - - p. 462 
1 
than one — 2. 


ee 


BI U u un a. ft na Be Ze 
idee‘ ? - 
r nr . ; 

. 


Gammarus 


Antenna 1 shorter than antenna 2 — 3. 


2. Antenna 1 not shorter than antenna 2 — 5. 


Antenna 2, ultimate joint of pedunele shorter 
than penultimate- . .. 2... 020... 

Antenna 2, ultimate joint of peduncle longer 
than penultimate — 4. 


Gnathopod 2, 6th joint narrow, subeylindric . 


* Gnathopod 2, 6thjointnot narrow, subrectangular 


Pleon segment 4 without dorsal spinules --- 6. 


B Pleon segment 4 with dorsal spinules — 16. 


Pleon segment 5 without dorsal spinules — 7. 
Pleon segment 5 with dorsal spinules — 14. 


[e2) 


Uropod3, outer ramus little longer than pedunele 
Uropod 3, outer ramus much longer than 
peduncle — 8. 


h 


Uropod 3, inner ramus less than half as long 
as outer — 9. 

Uropod 3, inner ramus fully half as long as 
outer — 13. 


| 

| 

| 

| 

| 

| 
| Uropod 3, outer ramus with rather large 
| 

| 

| 

| 

| 


& 


9 2d joint — 10. 


Uropod 3, outerramus with very small 2d joint —1 


| Uropod 3, inner ramus scarcely !/ of outer . 


2 Uropod 3, inner ramus nearly !/s of outer. 


Peraeopods with very few setae ..... - 


41 Peraeopods with numerous setae — 12. 


Pleon segments 4 and 5 dorsally upraised, 
EN TER RE 
Pleon segments 4 and 5 not dorsally upraised 
er Er Sr 


12 


Mandibular palp of normal size... .... 


18 Mandibular palp abnormally large . ... . 


“ Peraeopod 5, 24 joint produced behind 34 
Peraeopod 5, 2d joint broad, abruptly contracted 
a a re EL N a 


Peraeopod 5, 2d joint not broad, not abruptly 
a EA NR 


15 


Pleon segments 2 and 3, postero- See corners 
obliquely truneate . .’. 2.22... 

Pleon segments 2 and 3, postero-lateral eorners 
not truncate — 17. 


Uropod 3, inner ramus less than half as long as 
outer — 18. 

Uropod 3, inner ramus not less than half 
as long as outer — 24. 


17 


18 { Uropod 3, outer ramus remarkably long — 19. 
Uropod3, outer ramus not remarkably long — 21. 


ee NEE 
Gnathopod 1, 6th joint not much broader than 


| Gnathopod 1, 6th joint much broader than that 
that of gnathopod 2 — 20. 


461 


2. G. abbreviatus.. . . p.462 

3. G. annulatus. . . . p.463 

4. G.natator . . . .. p- 463 

2... 0B6BUB 2. p- 464 

% 

6. G. macrurus . . . . p.464 

7. G. compressus . . . P. 

8. G. subnudus. . p 

9. G. deminutus . . . p.466 

10. G. similis . -. . - . p.466 

1l. G. weidemanni. . . p. 467 

12. G. maeotieus. . . . p.467 
G. erassus . . . . » p.467 


. 13. 
Peraeopod 5, 24 joint not produced behind 3d — 15. 


17, 


. G. warpachowskyi . p. 468 


. G. pauxillus . . . . p.469 


. G.kietlinski . . . p.469 


G. andrussowi.. . + p.469 


462 Gammarus 


90 Byes short, avaliin)e ar a 18. G.ischnus. . . . . p.470 
Eyes long, retort-shaped. .. .». 2:2...» 19. G. plaeidus . . . . p.470 
Gnathopod 2, 6th joint greatly expanded distally 20. G. platycheir. . . . p.471 

21 Gnathopod 2, 6th joint not greatly expanded 

distally — 22. 
Antenna 1, 1st joint not as long as 2d and 3d 

09 Bombinad 2a Eee 21. G.pungens. . .. . p. 471 
Antenna 1, 1st joint as long as 24 and 3d 

combined — 28, 

08 Pleon segments 4—6, dorsal spinules numerous 22. G. marinus. ... . p.472 
Pleon segments 4—6, dorsal spinules few . . 23. G.simoni . ... . p- 473 

04 Pleon segments 4—6 dorsally hairy. . . . . 24. G. duebenii . . . . p.473 
Pleon segments 4—6 not dorsally hairy — 25. 
Antenna 1, accessory flagellum with not more 

98 than 4 joints — 26. 

Antenna 1, accessory flagellum with more than 
4 joints — 29. 
Peraeopod 5, 24 joint with lower hind corner 

96 ee 1 TE 25. G. Dülez . . ,.,.... p- 474 
Peraeopod 5, 2d joint with lower hind corner 

not rounded — 27. 
Uropod3, inner ramus only half as long as outer 26. G. delebecquei.. . . p.475 

27 | Uropod 3, inner ramus much more than half 

as long as outer — 28. 
Gnathopod 1, 6th joint rather longer than that 

08 DERUSEROWBR BE en ”., . 27. G. hyaeinthinus p- 475 
Gnathopod 1, 6th joint not longer than that of 

BE RER a 28. G. syriacus p- 475 

09 Eyes reniform. ....:... Bas 29. @.locusta .... . p. 476 es 

Eyes constrieted in the middle... .. .. 30. G. camylops p: 476 


1. G. guernei Chevreux 1889 @.g., Chevreux in: Bull, Soc. zool. France, v. 14 
p.294 f. | 1893 @. pungens (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.764. 


In form resembling G. pulex (p. 474). Pleon segments 4—6 with 
small dorsal fascicles of spines, 6 spines on segment 4, 8 on segment 5, 
2 on segment 6. Head (in figure) with lateral angles scarcely at all prominent. 
Side-plates 1—4 rather deep. Pleon segments 1—3, postero-lateral angles 
acute. Eyes small, reniform. Antenna 1 not quite half as long as body, 
pedunele not long, 24 joint rather shorter than 1°, and 39 than 24, flagellum 
quite smooth, 19-jointed, accessory flagellum 1-jointed. Antenna 2 considerably 
shorter, flagellum without setae, 9-jointed. Gnathopods 1 and 2 similar, 
but 5th and 6th joints longer in gnathopod 2, 6tk joint oblong, palm well 
defined, short, a little oblique. Peraeopod 1, 4tk joint long and wide, strongly 
setose on hind margin, 5tk joint much narrower and shorter, likewise setose. 
Peraeopod 2 shorter and slighter, not setose. Peraeopods 3—5 rather long, 
24 joint well expanded, oval. Uropod 3 reaching far beyond the others, 
outer ramus very long, with small 24 joint, inner ramus rudimentary, oval. 
Telson very short, each broadly oval lobe having a fasciele of spines at 
middle of outer margin, and another of 5 spines at apex. L. 6 mm. 


Azores (Flores). Torrents. 


2. G. abbreviatus O. Sars 1894 @.a., G.O.Sars in: Bull. Ae. St.-Pötersb., 
ser.5 v.1 p. 365. 


a ee Ir 


Ei 
= 
BY 
Br 
B. 
x 
= 
u D 
. 


Gammarus 468: 


Body rather short and stout, pleon segment 4 smooth, segments 5 and 6 
each with 1 or 2 very small dorsal spinules. Head, lateral lobes slightly 
prominent, evenly rounded. Side-plates 1—4 distally conspieuously erenulate 
and setose, 1% obliquely expanded below, 4{k very broad. Pleon segments 2 
and 3, postero-lateral corners acute. Eyes oval reniform. Antenna 1 very short, 
not ?/, as long as body, 1° jointlarge, longer than 24 and 39 combined, flagellum 
about as long as pedunele, 9-jointed, accessory flagellum 4- or 5-jointed. 
Antenna 2 rather longer, setose, ultimate joint of peduncle shorter than 
penultimate, flagellum about 7-jointed. Gnathopods 1 and 2 in © similar, 
24 slightly the larger, 6*% joint oblong oval, palm rather oblique, pretty well 
defined. Gnathopods 1 and 2 in J stronger, much more unequal, 6 joint 


in gnathopod 1 narrowing distally, palm more oblique, in gnathopod 2 much 


larger, oblong oval, with the usual spine in middle of palm. Peraeopods 1 
and 2 strongly built, densely setose, 4 joint large and expanded. Peraeo- 
pods 3—5, 24 joint expanded, rounded quadrangular in peraeopod 3, expanded 
above, tapering below in peraeopod 4, much larger and regularly oval in 
peraeopod 5, produced downward behind in narrowly rounded lobe. Uropods 1 
and 2 reaching beyond peduncle of uropod 3. Uropod 3 not very long, 
outer ramus densely setose, with small but obvious 24 joint, inner ramus. 
about as long as the short peduncle. Telson about as long as broad, each 
lobe with 3 apical spines, otherwise smooth. L. © 12, 0 13 mm. 


Caspian Sea. Among Zostera. 


3. G. annulatus S.I. Sm. 1873 @..a., (S. 1. Smith in:) A. E. Verrill in: Rep. 
U.S. Fish Comm., v.1 p.557 | 1893 @. locusta (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p. 760. 


Pleon segment 4 with median faseiele of 2 large and 2 small spines, 
segments 5 and 6 with lateral fascicles as well as median. Head, lateral 
lobes truncate, somewhat prominent. Eyes scarcely reniform, lower border 
remote from lateral lobes of head. Antenna 1 shorter than antenna 2. 
Antenna 2, ultimate joint of peduncle longer than penultimate, flagellum 
slender, with rather elongate joints. Gnathopod 1, 6% joint rather elongated, 
palm very oblique. Gnathopod 2, 6! joint very narrow, elongated, sub- 
eylindrieal, slightly flattened on inner side, palm longitudinal, scarcely 
distinct from hind margin. Colour greyish white, hind margins of segments 
annulated with brown, red spots on some of the pleon segments. L. 12—18 mm. 

North-Atlantic (New Haven [Connectieut], and Eastport [Maine]). . Under 
stones, shore. 


4. G. natator S.I.Sm. 1873 @.n., (S.I Smith in:) A.E. Verrill in: Rep. 
U. S. Fish Comm., v.1 p.558 | 1893 @. loeusta (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p. 760. 

Pleon segment 4 with median faseicles of spines, segments 5 and 6 
with median and lateral fascicles. Side-plates 1—3, lower margin setose. 
Pleon segments 2 and 3, postero-lateral angles acutely produced. Eyes large, 
long, slightly reniform. Antenna 1 shorter than antenna 2, setose, many of 
the setae plumose. Antenna 2 also setose, ultimate joint of pedunele longer 
than penultimate, flagellum about °/, length of peduncle. Gnathopod 1 in 
Ö more slender than gnathopod 2, 6% joint oval, palm continuous with 
hind margin, defined by 2 small spines, with stout spine in middle of laminar 
margin, finger strongly eurved. Gnathopod 2, 6% joint subreetangular, palm 
slightly oblique, armed as in gnathopod 1, but with notch for the stout spine. 
In © gnathopods 1 and 2 have 6! joint smaller and slenderer, somewhat oval, 


464 Gammarus 


nearly alike in both gnathopods. Uropod 3, rami long, lanceolate, fringed 
with long plumose setae, outer with slender, almost spiniform 24 joint, 
‘inner as long as 1° joint of outer. Telson, each lobe nearly thrice as long 
as broad. L. 10—12 mm. 


Vineyard Sound [United States of America]. At surface, usually among floating 
sea-weed. 


5. G. obesus O.Sars 1894 @.o., G.O.Sars in: Bull. Ace. St.-Petersb., ser. 5 
v.1 p. 368 t. 15. 


Body extremely short and stout, more so than in any other known 
Gammarus, dorsally smooth, except for a pair of very small spinules on pleon 
segment 6. Head, lateral lobes little prominent, evenly rounded. Side- 
plates 1—4 large and deep, distally fringed with setae, 1° rather broadly 
expanded distally, 4" not as broad as deep. Pleon segments 2 and 3, 
postero-lateral corners obtusely quadrate. Eyes oval, reniform, not large. 
Antenna 1 about '/, length of body, 1° joint large, longer than 24 and 34 
combined, flagellum rather longer than peduncle, 15-jointed, accessory flagellum 
2-jointed. Antenna 2 rather shorter, flagellum as long as ultimate and pen- 
ultimate joints of peduncle combined, 7-jointed. Gmnathopods 1 and 2, 6% joint 
oblong oval, palm well defined, not very oblique, more so in J than in ©, 
gnathopod 2 a little stronger than gnathopod 1, and both gnathopods rather 
stronger in J than in ©. Peraeopods 1—5 rather strong, densely setose, 
5th joint short, finger strong. Peraeopods 3 and 4, 24 joint narrowing 
distally, so that the lower hind corner is not free. Peraeopod 5, 24 joint 
widely expanded, widened distally, with broadly rounded lobe. Uropods 1 
and 2 with only apical spines. Uropod 3 unusually short and stout, reaching 
little beyond the others, outer ramus scarcely longer than peduncle, carrying 
plumose setae, 24 joint minute, inner ramus scale-like, with 1 apical spine, 
Telson much broader than long, each lobe having 1 spine and 2 setules 
on the narrowly truncated apex. L. © 8, d 9 mm. 


Caspian Sea. Shallow water. 


6. G. macrurus O. Sars 1894 @. m., G. ©. Sars in: Bull. Ae. St.-Pötersb., ser. 5 
v.1 p.350 t. 10 £. 17—27. 


Q. Body slender, dorsally smooth except for a pair of very small 
spinules on pleon segment 6. Head, lateral lobes broadly rounded, prominent. 
Side-plates 1—4 rather large, fringed with scattered setules; 1° a little 
expanded, 4 very large, as broad as deep. Pleon segments 2 and 3, postero- 
lateral corners produced to a rather obtuse point. Eyes not very large, 
oblong oval, dark. Antenna 1 scarcely more than '/, length of body, 1 joint 
large, nearly twice as long as 2% and 34 combined, flagellum about as long 
as pedunele, 6-jointed, accessory flagellum 3-jointed. Antenna 2 a little 
shorter, antepenultimate joint of pedunele wide, projecting, ultimate joint 
shorter than penultimate, flagellum 4-jointed. Gmathopods 1 and 2 small 
and feeble, 6' joint subequal to 5tk in length and scarcely broader, these 
2 joints being rather longer, but not wider, in gnathopod 2 than in gnatho- 
pod 1. Peraeopods 1 and 2, 4th joint rather expanded, this and the 5th 
setose. Peraeopod 3, 24 joint rounded quadrangular. Peraeopod 4, 24 joint 
narrower and scarcely longer, narrowed close to distal end. Peraeopod 5, 
24 joint much larger, oval, hinder expansion produced downward in a broadly 
rounded lobe. Uropods 1 and 2, rami equal, narrow. Uropod 3 long, 


Gammarus 465 


reaching much beyond the others, outer ramus long, with setae on inner 
margin, its 24 joint fully half as long as 1° and as long as the pedunele, 
"inner ramus shorter than peduncle, tipped with 2 spines. Telson much 
Re. longer than broad, tapering, each narrow lobe having 1 lateral and 1 apical 
spinule. L. 6 mm. — J not known. 


Caspian Sea. 


7. G. compressus O.Sars 1894 @.c., G.O. Sars in: Bull. Ace. St.-Pötersb., 
ser.5 v.1 p. 353 t. 11 £.1—10. 


Q. Body slender, much eompressed, dorsally smooth except for pair ' 
of minute spinules on pleon segment 6. Head without rostrum, lateral lobes 
 narrowly rounded, little prominent. Side-plates 1—4 large, setulose, . 1°t 
widely expanded forward, 4 as broad as deep. Pleon segments 2 and 3, 
postero-lateral corners subquadrate. Eyes not large, narrowly oblong, dark. 
Antenna 1 scarcely more than '/, as long as body, 1° joint massive, longer 
than 22 and 34 combined, flagellum subequal to pedunele, 9-jointed, accessory 
fagellum 3-jointed. Antenna 2 subequal to antenna 1, ultimate joint of pedunele 
shorter than penultimate, flagellum subequal to peduncle, 6-jointed. Gnatho- 
pods 1 and 2 rather small and feeble, palm short and nearly transverse, 5!" and 
6 joints rather narrower and longer in gnathopod 2 than in gnathopod 1. 
Peraeopods 1 and 2 strongly built, especially peraeopod 2, 4" joint large, 
expanded, 5tl oval, both densely fringed with setae on hind margin. Peraeo- 
pods 3—5 subequal in length, 4% joint rather broad, 24 joint rounded oval 
in peraeopod 3, narrower in peraeopod 4, with very sinuous hind margin, 
much larger and oval in peraeopod 5, ending in a produced, rounded lobe. 
Uropods 1 and 2, rami subequal, narrow, with spines only at apex. Uropod 3 
of moderate size, reaching beyond the others, outer ramus about twice as 
long as peduncle, 24 joint about half as long as 1°, inner ramus nearly 
half as long as outer, tapering, tipped with a spine and 2 or 3 setules. 
Telson fully as long as broad, lobes gradually diverging, each with 2 spines 
at the somewhat truncated apex. L. 7” mm. — © unknown. 


Caspian Sea. 


8. G. subnudus O.Sars 1896 @.s., G. O. Sars in: Bull. Ace. St.-Pötersb., ser. 5 
©.& p.451 t.6 f. 11-19. 


O0. Back broadly rounded, dorsally smooth except for a few small 
hairs at end of pleon segments 4—6. Head, lateral lobes broad, obliquely 
truncated, lower corner the more prominent. Side-plates 1—4 large, not 
setose, 1° not expanded distally, 4 broad. Pleon segments 2 and 3, 
postero-lateral corners quadrate. Eyes of medium size, oblong oval, dark, 
Antenna 1 scarcely more than /, as long as body, 1° joint scarcely as long 
as 24 and 34 combined, flagellum subequal to pedunele, 16-jointed, accessory 
flagellum 3-jointed. Antenna 2 a little shorter, flagellum shorter than 
ultimate and penultimate joints of peduncle. Gmnathopod 1, 5th joint short, 
6th oblong oval, palm rather oblique, defining angle obtuse. Gnathopod 2 
similar in shape, but 6" joint more than twice as large as in gnathopod }. 
Peraeopods 1—5 not very slender, very scantily furnished with spines and 
setae, 24 joint in peraeopod 3 rounded quadrangular, in peraeopod 4 gradually 
but greatly narrowing distally so as to have no free corner, in peraeopod 5 
large, oval, with rounded lobe much produced downward. Uropod 3 of 
f moderate size, but reaching much beyond the others, outer ramus broad, 
= about twice as long as peduncle, fringed with setae, 24 joint small but distinct, 
\ Das Tierreich. 21. Lief.: T.R. R. Stebbing, Amphipoda I. 30 


466 Gammarus 


inner ramus very small, scale-like. Telson broader than long, the lobes each 
narrowing to a bluntaapex, tipped with a spine and setule. L.8 mm. — C unknown. 


Caspian Sea’ (Bay of Baku). Depth 4—11 m. 


9. G. deminutus Stebb.*) 1894 G. minutus (non @. pulex m. P. Gervais 1835!), 
G. O. Sars in: Bull. Ac. St.-Petersb., ser.5 v.1 p.347 t. 10 f. 1—26. 


Body rather short and stout. Pleon segments 4 and 5 dorsally strongly 
convex, gibbous, 4!" partly overlapping 5t" dorsally, each with a very small 
fasciele of hairs, segment 6 with a pair of spinules. Head, lateral lobes 
broadly rounded, rather prominent. Side-plates I—4 deep, but less so in 
Ö than in 9, setose, 1° slightly expanded, 4" not nearly as broad-as deep. 
Pleon segments 2 and 3, postero-lateral corners acutely quadrate. Eyes 
not large, oblong oval, dark. Antenna 1 little more than '/, as long as 
body, 1° joint large, nearly twice as long as 24 and 34 combined, flagellum 
subequal to pedunele, 8-jointed, accessory flagellum 3-jointed. Antenna 2 a 
little shorter, antepenultimate joint of peduncle thick, distally projeeting, ultimate 
joint shorter than penultimate, flagellum about half as long as peduncle, 4-jointed. 
Gnathopods 1 and 2 in © small, subequal, 6% joint oval quadrangular, palm 
short, almost transverse. Gnathopods 1 and 2 in J stronger, more unequal, 
6! joint in gnathopod 1 much narrower and with palm more oblique than 
in gnathopod 2. Peraeopods 1 and 2, 4tk joint rather large, this and 5th 
strongly setose on hind margin. Peraeopods 3—5 little differing in length, 
24 joint in peraeopod 3 subquadrate, lower hind ‘corner nearly rectangular, 
in peraeopod 4 much narrower, somewhat expanded above, with no free 
corner below, hind margin sinuous, in peraeopod 5 unusually large, front 
margin little convex, hind margin extremely so, with broadly rounded lobe 
produced downward. Uropods 1 and 2, rami with apieal spines only. Uropod 3 
of moderate size, reaching beyond the others, peduncle short, outer ramus 
narrow, with 1 fasciele of spines near middle of outer margin, others at 
apex of 1° joint, 24 joint very small, tipped with 3 'setules, inner ramus 
very small, with 1 apieal spinule. Telson with divergent lobes, each having 2 
small spinules on the obtuse apex. L. © 4, d 5 mm. 


Caspian Sea. 


10. G. similis O. Sars 1894 @. s., G. O. Sars in: Bull. Ac. St.-Pötersb., ser. 5 
v.1 p.355 t. 11 f. 11-20. 


Very like G. compressus (p. 465), less compressed, back broad, smooth, 
except for 2 minute spinules on pleon segment 6. Head, lateral lobes 
obtusely rounded, prominent. Side-plates 1—4 setose, 1° scarcely expanded, 
4th deeper than broad. Pleon segments 2 and 3, postero-lateral corners 
subquadrate. Eyes of moderate size, oblong reniform. Antennae 1 and 2 
equal, scarcely more thaı '/, as long as body. Antenna 1, 1° joint large, 
nearly twice as long as 24 and 34 combined, flagellum rather longer than 
pedunele, 11-jointed, accessory flagellum 4- or 5-jointed. Antenna 2, 
flagellum nearly as long as peduncle, 7-jointed. Gnathopods 1 and 2 in © 
small, 6 joint oblong, palm little oblique, St" and 6tk joints longer and 
narrower in gnathopod 2 than in gnathopod 1. Gnathopods 1 and 2 ind 
more powerful, palm more oblique, St and 6! joints little longer but much 
broader in gnathopod 2 than in gnathopod 1. Peraeopod 5, 24 joint compara- 
tively larger and more expanded than in G. compressus. Uropod 3 extending 
much beyond the others, outer ramus long, setose on inner margin, :24 joint 


*) Nom. nov. 


Zn a ee EA a BE EEE Fa 
Necto NER ; NEE En at 


Gammarus 467 


‘small, inner ramus scarcely '/, as long as outer, about as long as the short 
 pedunele. Telson rather broader than long, lobes divergent, each with 
2 spinules on rounded apex. L. 9 mm. 


Caspian Sea. From stones on shore, and among Zostera. 


11. G. weidemanni 0. Sars 1896 G. w., G. ©. Sars in: Bull. Ac. St.-Pstersb., 
ser.5 v.4 p.462 t.9 f. 1-11. 


ne: Body rather robust, back broadly rounded, smooth except for 2 pairs ' 
of minute spinules on pleon segment 6. Head, lateral lobes obliquely rounded, 
‚ upper corner the more prominent. Side-plates 1—4 setose, 1° rather expanded, 
24 a little narrowed distally, 4b as broad as deep. Pleon segments 2 and 3, 
postero-lateral corners acutely quadrate. Eyes of moderate size, oval reniform, 
dark. Antennae 1 and 2 equal, about '/, aslong as body. Antenna 1, 1° joint 
massive, longer than 29 and 3% combined, flagellum longer than peduncle, 
16-jointed, accessory flagellum 5-jointed. Antenna 2, antepenultimate joint 
ef pedunele projecting, ultimate joint shorter than penultimate, flagellum as long 
as these two combined, 8-jointed. Mandibular palp about as long as the trunk, 
setose, 34 joint curved, narrowly truneate at apex. Gmathopods 1 and 2, 
5th joint short, 6% rectangular, palm rather oblique; rather strong in ©, but 
stronger in S, in both sexes gnathopod 2 larger than gnathopod 1, but 
similar in shape. Peraeopods 1 and 2, 4 joint large, especially in peraeopod 2, 
both long and broad, 5 joint short and broad, both densely setose. Peraeo- 
pods 3—5 rather stout, spinose, 29 joint in peraeopod 3 rounded quadrangular, 
with rounded lobe produced downward, in peraeopod 4 a little longer, upper 
part wider, but narrowed "elow, leaving no free corner, in peraeopod 5 much 
larger, hind margin evenly convex, produced downward in broadly rounded 
lobe. Uropod 3 reaching much beyond the others, outer ramus about twice 
as long as peduncle, broad, fringed with setae, 24 joint minute, inner ramus 
longer than peduncle, more than half as long as outer, with setae and 2 spines on 
inner margin. Telson scarcely longer than broad, lobes tapering, divergent. 
each with 3 spines on blunt apex. L. G 11 mm. 


Caspian Sea (Bay Karabugas). On sandy bottom near shore. 


12. G. maeoticus Sowinski 1894 G. m., Sowinski in: M&m. Soe. Kiew, v.13 
(p-6) t.1A, 2 | 1896 G.m., G. O. Sars in: Bull. Ac, St.-Petersb., ser.5 v.4 p. 465 t.9 
f. 12— 20. 


: In many respeets agreeing with G. weidemanni, but some of the 
3 differences are striking. Head, lateral lobes narrowly rounded, prominent. 
-  $ide-plate 1 not at all expanded distally. Pleon segments 2 and 3, postero- 
lateral corners simply, not acutely, quadrate. Eyes rather small, decidedly 
reniform. Antennae 1 and 2 subequal, stout, '/, as long as body. Antenna 1, 
flagellum rather shorter than pedunele, 8- or 9-jointed, accessory flagellum 
5-jointed. Antepenultimate and penultimate joints of peduncle distally widened, 
setose, ultimate joint also setose, scarcely shorter than penultimate, flagellum 
6-jointed. Mandibular palp more than twice as long as the trunk, 3% joint 
as long as 24, both broad, setose. Gnathopods 1 and 2 in Q weak, subequal, 
in © much more powerful, unequal. Gnathopod 1 in Q', 6% joint narrowly 
> oblong. Gmathopod 2 in d, 6*h joint large and broad, oval quadrangular. 
er 2912 mm 
| Sea of Azov; Caspian Sea. Shallow water. 


13. G. erassus 0. Sars 1894 @.c.(O. Grimm in MS.), G. O.Sars in: Bull. 
Ac. St.-Petersb., ser.5 v.1 p.362 t. 13. 


30* 


N 2 er 


468 Gammarus 


Body rather short and stout, back broadly rounded. Pleon segment 4 
with dorsal fasciele of setules but no spines; segments 5 and 6 each 
with 2 dorsal groups containing 1 or 2 spinules a piece. Head, lateral lobes 
truncate, a little prominent. Side-plates 1—-4 with setules wide apart; side- 
plate 1 very little expanded, 4!" scarcely as broad as deep. Pleon segments 
2 and 3, postero-lateral eorners acutely produced. Eyes oval reniform, dark. 
Antenna 1 less than '/, as long as body, 1°t joint large, fully as long as 24 and 34 
combined, flagellum slender, longer than peduncle, 16-jointed, accessory 
flagellum 4-jointed. Antenna 2 a little shorter, ultimate joint of pedunele‘ 
shorter than penultimate, flagellum 8—11-jointed. Gnathopod 1 in 9, 6 joint 
oval, palm rather oblique, in gnathopod 2 rather larger, oblong, palm less oblique. 
Gnathopod 1 in ©, 6! joint narrowly oblong, palm sinuous, oblique, in gnatho- 
pod 2 nearly twice as large, broadly oblong, palm less sinuous, both gnathopods 
more powerful than in 2. Peraeopods 1 and 2, 4 joint rather large, 4% and 5th 
setose. Peraeopod 3, 24 jointrounded quadrangular. Peraeopod 4, 24 joint widely 
expanded, except distally, where there is scarcely a free corner. Peraeopod 5, 
24 joint very large, hind margin serrate, evenly convex, the expansion much 
produced downward in a broad obtusely truncate lobe. Uropods 1 and 2, 
rami nearly equal, with apical spines, the inner also with 1 or 2 lateral 
spines. Uropod 3 reaching much beyond the others, outer ramus twice as long 
as peduncle, fringed with setae, 24 joint very small, inner ramus scale-like, 
little more than half as long as peduncle. Telson scarcely as long as broad, 
each obtuse apex having 2 spines and 2 setules. L. oO 11, S 12 mm. 


Caspian Sea. Shallow water to 202 m. 


14. G. warpachowskyi O.Sars 1894 @.w., G.O.Sars in: Bull. Ace. St,-Petersb., 
ser.5 vo.1 p.343 t.9. 


Body rather slender and compressed, pleon segments 4—6 each with 
dorsal median fasciele of setules, segment 5 with 2 spinules among the setules, 
and oblique lateral rows of 3 spines and 2 or 3 spinules, segment 6 with 
lateral groups of 2 spines. Head, lateral lobes angularly prominent. Side- 
plates 1—4 with few setules, 1° scarcely expanded distally, 24 and 34 
rounded distally, so that the lower edges are not continuous, 4% not so 
broad as deep. Pleon segments 2 and 3, postero-lateral corners slightly 
produced. Eyes oblong oval, dark, elose to margin of head. Antenna 1 scarcely 
more than '/, as long as body, 3% joint half as long as 1°, flagellum longer 
than peduncle, 9-jointed, accessory flagellum with 2 joints, the last minute. 
Antenna 2 shorter, ultimate joint of pedunele little or in not at all shorter than 
penultimate, flagellum half as long as peduncle, with 5 joints inOQ,7 ind, which 
has both peduncle and flagellum brush-like. Gnathopods 1 and 2 in Q rather 
small, 6 joint oval quadrangular, palm nearly transverse, in gnathopod 2 
the 5t and 6% joints are rather longer, giving a more slender appearance, 
in the S both gnathopods much stronger, not very unequal, though gnathopod 2 
is the larger, 6% joint large, oblong, palm slightly oblique, shorter than the 
hind margin, finger strong. Peraeopods 1 and 2 rather slender. Peraeopods 
3—5 comparatively short and stout, 24 joint in peraeopod 3 subquadrate, 
in peraeopod 4 broadly expanded above, narrowed below, in peraeopod 5 
much larger, with broad expansion abruptly eontracted near the distal end. 
Uropods 1 and 2, rami equal, with apical spines, inner also with spinule at 
middle of inner margin. Uropod 3 reaching beyond the others, outer ramus 
with fascicles of spines but no plumose setae, 24 joint small, distinet, inner 
ramus small, shorter than the short pedunele. Telson short, broad, lobes 


N ar ie a en de Zn nA m. PT. 5 aim 
EL REN SERIES ERNEUERT m: en 45% he g 
= Bl A: R REN, al h f a : 
7 er fi ran > be WU- vi. “ > or Bee er % r... “ a N v .- “ IV ' Mu ” Kl a 
* r . N EN wid Me Ta, 
. Ca En ET EN a ur BE le Ten er N ta ae a Tune A al ar h =: an 
- bi ee TEN BR ; ‘ 
ä Be ; ar ö + PER, 
n > x 


Gammarus ’ 469 


little divergent, each with 3 spinules on convex margin, and 1 spinule with 
2 setules on rounded apex. L. Q about 6, © 7 mm. 


Caspian Sea. Depth 0—5 m. 
. 15. G. pauxillus O.Sars 1896 @. p. (0. Grimm in MS.), G. O. Sars in: Bull. Ace. 
St.-Pötersb., ser.5 v.4 p. 467 t. 10 f. 1—17. 


Body slender and eompressed, dorsally smooth except for a few small 
hairs at end of pleon segments 4—6, segments 5 and 6 each with 1 spinule 


.on either side. Head, lateral lobes obliquely truncated, upper corner the 


more prominent. Side-plates 1—4 not very large, without setae, 1° a little 
expanded distally, 24—4th with front corners rounded off. Pleon segments 2 
and 3, postero-lateral corners quadrate. lyes rather large, oblong oval, dark. 
Antenna 1 slender, more than half as long as body, 22 joint nearly as long as 1°t, 
flagellum twice as long as peduncle, filiform, 16—20-jointed, accessory flagellum 
3-jointed. Antenna 2 scarcely more than half as long, flagellum 5—7-jointed. 
Gmnathopods 1 and 2 in Q small and feeble, 6" joint oblong, in gnathepod 2 
rather longer than in gnathopod 1, slightly widened distally, palm less. 
oblique. Gnathopods 1 and 2 in J powerful, especially gnathopod 2, 6! joint 
oblong oval, palm much shorter than hind margin. Peraeopods 1 and 2 
slender, with few setae. Peraeopods 3—-5, 24 joint not greatly expanded, 
narrowing distally, hind margin not forming a free corner. Uropod 3 extending 
much beyond the others, outer ramus long, narrow, with fascicles of spines, 
24 joint spiniform, tipped with 2 unequal setules, inner ramus very small, 
shorter than the short peduncle. Telson very short, nearly twice as broad 
as long, the broadly rounded apex of each lobe smooth, but the outer margin 


. Just above carrying 2 setules. L. Q about 4, J 6 mm. 


- Caspian Sea. Depth 75—202 m. $ 


16. G. kietlinskii Dyb. 1874 @.k., B. Dybowsky in: Horae Soe. ent. Ross., 
v.10 suppl. p.57 t.1 f.1 | 1893 @. flwviatilis (part.)?, A. Della Valle in: F. Fl. Neapel, 


 .20 p. 929. 


Pleon segments 4—6 each carrying a median and 2 lateral groups 
of spines on slight elevations of the hind margin, in segment 4 each lateral 
group having 2 or 3 spines, the median having 2 spines, each on a separate 
elevation. Head, rostrum short, depressed. Side-plates 1—4 small, low, 
lower margins not continuous. Pleon segments 2 and 3, postero-lateral 
eorners obliquely truncate from behind forward. Eyes reniform, narrow, 
somewhat widened below, black. Antenna 1 about half as long as body, 
flagellum longer than pedunele, 75-jointed, accessory flagellum 14-jointed. 
Antenna 2 not much shorter, flagellum shorter than peduncle, 80-jointed, 
with large calceoli in both sexes. Gmathopods 1 and.2 with 6! joint equal 
in both sexes, more or less piriform. Peraeopods 3—5, 24 joint very slender, 
expansion not great above and thence tapering. Uropods 1 and 2 reaching 
end of shorter ramus of uropod 3. Uropod 3 about "/, as long as body, 
rami thickly fringed with fascieles of simple setae and having a few plumose 
setae on inner margin of outer and both margins of inner ramus, the latter 
", or ®, as long as outer ramus. Colour red, margins of segments and 
side-plates, joints and apices of appendages yellow or olive-greenish. L. 81 mm. 


Lake Baikal. Depth 50 m. 


17. G. andrussowi O0. Sars 1896 @.a., G. O. Sars in: Bull. Ae. St.-Petersb., 
ser.5 v.4 p.469 t.10 f. 18—26. 


470 Gammarus 


Q. Body slender and compressed, pleon segments 4 and 5 each with 
a median faseiele of 2—4 spinules and 2 lateral groups of 3 spinules, segment 6 
with a pair of spinules. Head, lateral lobes broad, vertically truncated. Side- 
plates 1—4 without setae, 1°* little expanded distally, but broader than 24, 
4th rather broad. Pleon segments 2 and 3, postero-lateral corners quadrate. 
Eyes small, oval reniform. Antenna 1 slender, more than half as long as body, 
1° joint not as long as 24 and 34 combined, flagellum twice as long as 
peduncle, 20-jointed, accessory flagellum 4-jointed. Antenna 2 scarcely more _ 
than half as long as antenna 1. Gmathopod 1, 5% joint short, 6!" large, oblong 
oval, palm oblique but well defined. Gnathopod 2 slender. 5" and 6th joints 
subequal, long, sublinear, palm small, almost transverse, the 6! joint being 
shorter and very much narrower than in gnathopod 1, but 5% and 6th joints 
together longer than the same two in gnathopod 1. Peraeopods 1 and 2 
rather slender. _Peraeopods 3—5, 2° joint rather broad and expanded, with 
free corner to hind margin in peraeopod 4 as well as 3 and 5, in peraeopod 5 
much larger, with the expansion obtusely truneated below. Uropod 3 extending 
much beyond the others, outer ramus long, sublinear, with fascicles of spines 
on each margin, 2% joint small, spiniform, inner ramus scale-like, shorter 
than the short peduncle. Telson broader than long, lobes rather divergent, 
each with 1 lateral spine and 3 spinules on the obtuse apex. L. 5 mm. — 
S unknown. 


Caspian Sea. 


18. G. ischnus Stebb. 1896 @. tenellus (non. J. D. Dana 1852)), G. O. Sars in: 
Bull. Ae. St.-Petersb., ser.5 v.4 p.455 t.7 f. 12—24 | 1899 @. ischnus, T. Stebbing in: _ 
Tr. Linn. Soc. London, ser.2 ©.7 p. 428. 


Body exceedingly slender and compressed, pleon segments 4—6 each with 
1 median and 2 lateral fascieles of slender, upturned spinules, usually 2 to 
a group, sometimes together with a setule. Head, lateral lobes very obliquely 
truncated, upper angle acutely prominent. Side-plates 1—4 not large, quite 
smooth, 1° scarcely expanded, distally rounded, 4 not very broad. Pleon 
segment 2, postero-lateral corners acutely quadrate, in segment 3 acutely 
produced. Eyes well developed, but rather small, oblong oval, elose te 
margin of head. Antenna 1 more than half as long as body, peduncle long, 
1° joint not as long as 24 and 34 combined, flagellum twice as long as 
peduncle, 20-jointed, accessory flagellum 4-jointed. Antenna 2 considerably 
shorter, setose, especially in C, ultimate and penultimate joints of peduncle 
equal, flagellum 11-jointed. Gnathopods 1 and 2 rather feeble in ©, stronger 
in C, not very unequaäl, but gnathopod 2 the longer, 6" joint oblong, with 
palm rather oblique in gnathopod 1 and in G somewhat concave, in gnathopod 2 
nearly transverse. Peraeopods 1 and 2 rather slender, much smaller than 
the others. Peraeopods 3—5, 29 joint narrowiy oval, im peraeopod 5 scarcely 
differing from that in 4{h, not forming a free corner in any peraeopod. Uropods 1 
and 2, outer ramus rather shorter than inner. Uropod 3 very long, outer 
ramus sublinear, with 5 fascicles of spines on each side, 24 joint spiniform, 
well defined, tipped with setules, inner ramus seale-like, shorter than the 
short pedunele. Telson small, much broader than long, lobes divergent, 
with 2 spinules on outer margin of wide upper part, thence rapidly tapering 
to obtuse apex with 3 spinules. 1.9 6 mm, © a little longer. 

Caspian Sea (south of Baku). Depth 11m. 


19. G. plaeidus O. Sars 1896 @.p. (O. Grimm in MS.), G. ©. Sars in: Bull. 
Ac. St.-Pötersb., ser.5 0.4 p.457 t.8 f.1—12. 


Gammarus 471 
Body exceedingly slender, less compressed than in G. ischnus; pleon 
 segments 4—6 each with 1 median and 2 lateral fascieles, the latter containing 
each 4 spinules in segment 4, 3 in segment 5, 2 in segment 6. Head, 
_ lateral lobes conspieuously acute, the point sometimes slightly deflexed. Side- 
 plates 1—4 not very large, 1° quadrangular, 24 and 34 slishtly narrowed 
distally, 4% at least as broad as deep. Pleon segments 2 and 3, postero- 
lateral eorners acutely quadrate. Eyes dark, very narrow, deep, below a 
little inflated and bent forward. Antenna 1 slender, nearly ®/, as long as 
body, 24 joint fully as long as 1°, flagellum twice as long as peduncle, 
about 33-jointed, accessory flagellum 7-jointed. Antenna 2 shorter, more 
densely setose, ultimate joint of peduncle (in figure) longer than penultimate, 
flagellum about 16-jointed. Gnathopods 1 and 2 in © not powerful, setose, 
subequal, but 5!" and 6! joints in gnathopod 1 rather shorter, 6! oblong 
oval, palm rather oblique, 6'k joint in gnathopod 2 oblong, palm nearly 
transverse (in young J gnathopod 2 considerably larger than gnathopod 1). 
Peraeopods 1 and 2 rather slender, 1° the longer. Peraeopods 3—5 stouter, 
rather long, often reflexed, 29 joint narrowly oblong oval, without a free 
corner, in peraeopod 5 of same size and shape as in 4, Uropods 1 and 2, 
rami spinose, Uropod 3 exceedingly long, outer ramus nearly 4 times as long as 
pedunele, sublinear, with many fascieles of spines and a few setae on both 
 margins, 2° joint spiniform, inner ramus extremely small, not half as long 
as peduncle. Telson short, nearly twice as broad as long, lobes not divergent, 
outer margin almost angularly bent below its 1 spinule, apex obtusely truncated, 
earıying 1 spinule. L. © 13 mm. 

Caspian Sea. Depth 4—75 m. 

20. G. platycheir O. Sars 1896 @.p., G. O.Sars in: Bull. Ace. St.-Pötersb., 
ser.5 v.4 p.460 t.8 f. 14—17. 

S(?). Body rather robust, back broadly vaulted, pleon segments 4—6 
dorsally each with 2 adjacent spinules, segment 6 also with a spinule on 
either side. Head, lateral lobes rather broad, vertically truncated. Side- 
plates 1—4 rather deep, setose, 1° smallest, 1% and 24 distally narrowed, 
34 much larger, oblong, 4" nearly as broad as deep. Pleon segments 2 
and 3, postero-lateral corners quadrate, 24 on anterior lateral margin closely 
fringed with delicate, curved setae. Eyes not large, oval reniform. Antenna 1 
very short. not '/, as long as body, 1° joint as long as 24 and 32 combined, 
flagellum shorter than pedunele, 12-jointed, accessory flagellum 4-jointed. 
Antenna 2 as long or a little longer, flagellum 11-jointed. Gmnathopod 1 
much the smaller. Gnathopod 2, 5! joint small, 6! very large, flattened, 
gradually expanding to the long, oblique, evenly eurved palm, which is densely 
fringed with spiniform setules, and defined by 3 strong spines, among which 
the tip of the long faleiform finger eloses down. Peraeopod 2 more setose 
than peraeopod 1. Peraeopod 3 much shorter than peraeopods 4 and 5, 
24 joint in peraeopods 3 and 4 narrowed below, without a free corner, in 
peraeopod 5 much larger, oblong oval, hind margin closely fringed with setules. 
Uropod 3 reaching beyond the others, outer ramus subfoliaceous, twice as long 
as peduncle, fringed with setae, 24 joint very small, inner ramus about "/, 
as long as outer, with 2 spinules at apex. Telson about as long as hroad, 
left not quite to the base, the broad lobes distally divergent, with 3 spinules 
on the blunt apex of each. L. 16 mm. 

Caspian Sea (mouth of Volga). 

21. G. pungens M.-E. 1840 G.p., H. Milne Edwards, Hist. nat. Crust., v.3 
p-47 | 1893 G. p. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 764 t. 24 f.35 | 1862 


a et) 
® SEP 
'@ 


A e 


472 Gammarus 


@.p., Niphargus (part.)?, Bate, Cat. Amphip. Brit. Mus., p.217 | 1888 @. (N.) p., T. Stebbing 
in: Rep. Voy. Challenger, v.29 p.253 |; 1890 N. p., Wrzesniowski in: Z. wiss. Zool., v. 50 
p. 603, 673 | 1865 Gammarus veneris, Cam. Heller in: Verh. Ges. Wien, v.15 p.981| 
1894 G. v., Chevreux in: Bull. Soc. zool. France, v.19 p.171 f. | 1895 @. v., Chevreux 
in: Rev. biol. Nord France, v.7 p. 159. 


Near to G. marinus. Body slender and compressed, pleon segments 4 
and 5 each with 1 or 2 spinules at 4 points of back, segment 6 with spines 
apparently only at 2 points. Head, lateral lobes rather obliquely truncate, 
post-antennal corners almost acute. Pleon segment 3, postero-lateral corners 
produced acutely backward. Eyes narrow, oblong reniform, dark in spirit. 
Antennae 1 and 2 liable to variations in many respects. Antenna 1 nearly 
half as long as body, 1° joint not longer than 24, 34 about half as long as 24, 
flagellum twice as long as peduncle, 34-jointed, accessory flagellum 4—6- 
jointed. Antenna 2 considerably shorter, with longer peduncle, penultimate 
joint of peduncle stouter than ultimate, but scarcely so long, flagellum sub- 
equal to peduncle, 16-jointed, the calceoli short and broad. Maxillipeds, 34 joint 
of palp slightly curved and distally widened. Gmathopods 1 and 2, 6th joint 
oblong oval, palm rather oblique, slightly sinuous and serrulate, ill-defined 
except by the palmar spines, finger in gnathopod 1 elosing more deeidedly 
against inner surface of hand than in the larger gnathopod 2. Peraeopods 
1—5 all slender, 24 joint in peraeopods 3—5 distally narrowed, free corner 
quadrate, not very prominent. Uropod 3 reaching much beyond the others, 
outer ramus more than thrice as long as peduncle, 1° joint with spines at 
4 points of outer and 3 of inner margin, both margins fringed with long 
conspicuous setae, 24 joint also setose, very small, inner ramus shorter than 
peduncle, very slender, smooth on inner margin, with spines and setae on 
outer and apex. Telson cleft to base, little longer than broad, each lobe 
with 1 spine high up on outer margin and 2 at the narrowed truncate apex. 
Colour grey or brownish, rarely with rusty spots. L. 6—12 mm. 


Italy (hot springs?); Sieily; Cyprus (fresh water, 15—16m above the sea); Syria. 


22. G.marinus Leach 1815 @. m., Leach in: Tr. Linn. Soc. London, v.11 p.359 | 
1862 G. m., Bate, Cat. Amphip. Brit. Mus., p.215 t.38 f.4 | 1889 G. m., A. M. Norman 
in: Ann. nat. Hist., ser. 6 v.4 p.138 t.12 f.12 ! 1893 G. m., A. Della Valle in: F. Fl. 
Neapel, v.20 p.762 t.60 f.28 | 1894 @.m., G.O.Sars, Crust. Norway, v.1 p.497 t.175| 
1830 @. olivii, H. Milne Edwards in: Ann. Sei. nat., v.20 p. 367, 372 t.10 f.9, 10| 
1837 @. gracilis, H. Rathke in: M&m. pres. Ac. St.-Petersb., v.3 p.374 t.5 £.7—10 | 
1840 @. affinis, H. Milne Edwards, Hist. nat. Urust., ©.3 p.47 | 1843 @. poecilurus + 
@. kröyerii, H. Rathke in: N. Acta Ac. Leop., 0.201 p.68 t.4 f.2; p.69 t.4 f.1 | 1851 
@G. locustoides, F. Brandt in: Middendorff, Reise Sibirien, v.21 p.139 t.6 f.30a—c. 


Body slender and compressed, pleon segments 4—6 each dorsally 
carrying 2 upward converging rows of spinules, each row having 6—9 spi- 
nules in 2 slightly separated groups. Head, lateral lobes vertically trun- 
cate. Side-plates 1—4 not very deep, 4 scarcely as broad as deep. Pleon 
segments 2 and 3, postero-lateral corners acutely quadrate. Eyes narrow, 
long, oblong reniform, dark. Antenna 1 nearly half as long as body, 1° joint 
as long as 24 and 34 combined, flagellum more than twice as long as peduncle, 
33-jointed, accessory flagellum about 7-jointed. Antenna 2 sometimes con- 
siderably shorter, flagellum rather longer than peduncle. Gnathopod 1, oblong 
oval, palm slightly oblique, both 5th and 6tk joints rather longer and stronger 
in C than in ©. Gmnathopod .2 in Oo, 5tk joint longer than in gnathopod 1, 
6" oblong, with palm nearly transverse, not larger than in gnathopod 1. 
Gnathopod 2 in OS not larger than gnathopod 1, palm nearly transverse. 


Be  ieaninan nn aan rs ne in, 
i r DE ERS en 


. Fr Ko A a a I RT re ET Er ER rl ZEIG a a E 
wi SEEN ER, Ya a rg Sa Pr BASEHE ee Fr 
re ee ee 


Gammarus r 473 


Peraeopods 3—5 rather short and stout, 24 joint in peraeopod 3 with lower 
hind corner rounded, free, in peraeopods 4 and 5 narrowed distally, without 
a free corner. Uropod 1 reaching beyond uropod 2, uropod 3 beyond uropod 1. 


- Uropod 3, outer ramus long, with spines and setae on both margins, 24 joint 


small, spiniform, inner ramus very narrow, scarcely '/, as long as’ outer. Telson 
rather small, lobes distally divergent, each with 2 marginal spines near base, 
and 3 on the truncate apex, 1 or 2 setules usually near outer margin a 
little above apex. Colour greenish or yellowish brown. L. 15 mm. 

North-Atlantie with adjoining seas (Europe, from Trondhjemsfjord round the 
marine coasts to the Black Sea; North-East-America). Littoral. 


23. G. simoni Chevreux 1894 @. s., Chevreux in: Bull. Soe. zool. France, v. 19 
p. 171 £.2—10. 

Pleon segments I—3 each with 2 or 3 dorsal setules, segments, 4—6 
with dorsal spinules, segment 4 with 2 near together, segment 6 with 2 
wide apart, segment 5 with 2 pairs, each pair having between then 2 setules. 
Head, lateral lobes obtusely truncate. Side-plate 4 rather less broad than 
deep. Pleon segments 2 and 3, postero-lateral corners produced, acute. Eyes 
small, oval. Antenna 1 in d ?/, as long as body, peduncle short, 1° joint 
as long as 24 and 39 combined, flagellum twice as long as peduncle, 30—35- 
jointed, accessory flagellum (1-) 3—5-jointed. Antenna 2 in JS considerably 
shorter, peduncle robust, ultimate and penultimate joints tufted with long 
setae, flagellum 12-jointed, */, (or less) of it setose like peduncle, apparently 
without calceoli. Antenna 1 in Oo as in Cd. Antenna 2 in © shorter, less 
robust, setae few and short. Gnathopods 1 and 2 in © feeble, 6! joint 
oblong, tending to oval, with oblique palm in gnathopod 1, rather longer 
and narrower, with palm almost transverse in gnathopod 2. Gmathopod 1 
in S, side plate with sinuous front margin (in figure), 6% joint large, piriform, 
with 6 spines on hind margin and palm, finger long, eurved, its apex closing 
against side of 6! joint. Gnathopod 2 in S scarcely larger, 6tk joint oval, 
with 3 spines on the convex palm, which the finger fit. Peraeopods 1—5 
short and robust. Uropod 2 reaching nearly as far as uropod 1. Uropod 3, 
outer ramus long and broad, fringed with spines and plumose setae, 24 joint 
small, Spiniform, with apical setae, inner ramus rather broad, about '/, as 
long as 1° joint of outer, with 2 apical spines. Telson with broad divergent 
lobes, each having a spine on outer margin near the base, 2 spines and 
some setules on rounded apex, and in S a sub-central spinule. 1L. O0 6, 0 
reaching 8 mm. 

Algeria and Tunis. Fresh water. 


24. G. duebenii Lilj. 1851 @.d., W. Liljeborg in: Öfv. Ak. Förh., v.8 p.22 | 
1888 @. d., T. Stebbing in: Rep. Voy. Challenger, v.29 p.252 | 1894 @. dwebeni, G. O. 
Sars, Crust. Norway, v.1 p.502 t.177 £.1 | 1895 @. duab&ni, T. Scott in: Rep. Fish. 
Board Seotl., v.13 p.180, 244 | 1862 @. locusta (part.), Bate, Cat. Amphip. Brit. Mus., 
p- 206 | 1876 @. 1, A. Boeck, Skand. Arkt. Amphip., v.2 p.367 | 1893 @. 1. (part.), A. 
Della Valle in: F. Fl. Neapel, v.20 p. 760 | 1874 G@. marinus (part.), Ritzema Bos, Bijdr. 
Crust. Hedriophthal., p.44 | 1889 G. campylops (err., non Leach 1815!), A. M. Norman 
in: Ann. nat. Hist., ser.6 v.4 p.139 t.12 £.13 | 1889 @. locusta var. C, Hoek in: 
Tijdschr. Nederl. dierk. Ver., ser.2 ».2 p.219 t.10 f. 13, 13°. 


In form like G. loeusta (p. 476). Pleon segments 4—6 each with 2 spines 
in median dorsal group and 3 in each lateral group, also clothed with numerous- 
rather long hairs. Head, lateral lobes vertically truncate. Side-plates 1—4 
smaller than in G. locusta, more like those in G. marinus. Pleon segments 2 
and 3, postero-lateral corners acutely quadrate. Eyes not very large, reni- 


De PIIECHR Te ae ER RS, IE na KPI=" SE 
e ‘ Zu, aa. Bar nt ale 


474 Gammarus 


form, dark. Antenna 1 not quite half as long as body, 1° joint scarcely as 
long as 24 and 32 combined, flagellum about twice as long as peduncle, accessory 
flagellum about 6-jointed. Antenna 2 considerably shorter, flagellum with calceoli 
ind. Gnathopods1 and 2 in O nearly as in G. loeusta, but 6** joint of gnathopod 2 
not so narrow. Gmathopods 1 and 2 in C not so strongly developed as in 
G. locusta, and less unequal. Peraeopods 3—5 not very slender, 24 joint in 
peraeopod 3 with lower hind corner rounded. Uropod 3, rami densely setose, 
inner much more slender than outer, and reaching nearly °/, of its length. 
Telson rather broader than long, each lobe with 4 apical, 1 subapical, and 
2—4 lateral spines, the last near the base, the spines accompanied by long 
diverging setae. Colour generally dark, with the usual pink marks on sides 
of pleon segments 1—3. L. G 15 mm, 9 smaller. . 


South Greenland (warm springs); Norway (beach, under stones and algae, and in 
brackish pools above high water mark); Kattegat; Dutch coast; Guernsey; England; 
Ireland; lochs of Shetland, Outer Hebrides, and Perthshire. 


25. G. pulex (L.) 1758 Cancer p. (part.), Linne, Syst. Nat., ed.10 p.633 | 1763 
C. p., Seopoli, Eut. Carniol., p.412 | 1775 Gammarus p.. J. ©. Fabrieius, Syst. Ent., 
p. 418 | 1876 @. p., A. Boeck, Skand. Arkt. Amphip., ©.2 p.373 t.24 f.7 | 1888 @. »., 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.44, 253, 1703 | 1894 @.p., G. O. Sars, Crust. 
Norway, v.1 p.503 t.177 f.2 | 1777 Astacus p., Pennant, Brit. Zool., ed.4 v.4 p.17 | 
1778 Squilla p., Geer, M&m. Hist. Ins., ©. 7 p. 525 | 1793 Cancer (Gammarellus) p. 
(part.), J. F. W. Herbst, Naturg. Krabben Krebse, v. 2 p. 130 (not figure!) | 1808 
C. (Gammarus) p., Montagu in: Tr. Linn. Soc. London, ©. 9 p. 98 t.4 f.2 | 1815 
Gammarus aquaticus, Leach in: Tr. Linn. Soe. London, v.11 p.359 | 1830 @. fluviatilis, 
H. Milne Edwards in: Ann. Sei. nat., 9.20 p. 368 | 1898 @. f. (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 763 | 1835 @. fossarum, C.L. Koch, ©. M. A., v.5 nr.2 | 1839 
@. stagnalis, Andrzeiowski in: Bull. Soc. Moseou, nr.1 p.23 | 1863 @. lacustris, G. O. 
Sars in: Nyt Mag. Naturv., ©.12 p.206 | 1867 @. neglectus, G. ©. Sars, Crust. d’Eau 
douce Norvige, p.46 t.4,5; t.6 £. 1—20 | 1889 @. loeusta var. B, Hoek in: Tijdsehr. 
Nederl. dierk. Ver.. ser.2 v.2 p.214 t. 10 £.12, 12’. 


Pleon segments 4—6 each with 2 spines in median dorsal groups and a 
single spine on each side. Head, lateral lobes vertically truncated, less broad 
than in G. duebenii (p.473). Pleon segments 2 and 3, postero-lateral corners 
simply quadrate. Eyes small, oval, black. Antenna 1 nearly half as long as body, 
1°t joint not as long as 24 and 3% combined, flagellum twice as long as peduncle, 
25—28-jointed in C, accessory flagellum only 4-jointed. Antenna 2 con- 
$iderably shorter, flagellum 12-jointed, in S with calceoli. Gnathopods 1 
and 2 in © rather small, 6" joint in gnathopod 1 with oblique palm, in 
gnathopod 2 narrow, oblong, palm nearly transverse. Gmnathopods 1 and 2 
in J rather stronger, 6tk joint in gnathopod 1 piriform, in gnathopod 2 of 
about the same size, but rather oblong, widening slightly to the palm which 
is far less oblique. Peraeopods 1—5 slender, 24 joint in peraeopod 3 with 
lower hind corner rounded, in peraeopods 4 and 5 without a free corner, 
but hind margin convex. Uropod 3 long, rami fringed with long setae, 
some plumose, inner ramus subequal in length to 1° joint of outer (Sars) 
or ®/, as long as the whole ramus (Chevreux), with a single spine on inner 
margin near base. Telson rather small, each lobe with 2 apical spines 
and 1 on outer margin near the base. Colour dark or liebt brownish green. 
L. © reaching 20 mm, 9 smaller. 


Europe. Lakes and streams, generally distributed, found even in lakes 
900-- 1200 m above the sea. 


nn a u a & Bi a 


475 


26. G. delebeequei Chevreux & Guerne 1892 @.d., Chevreux & Guerne in: 
‚Bull. Soe. zool. France, v.17 p. 136 | 1893 @. fluviatilis (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 889. 


General form of body, armature of pleon segments 4—6, postero- 
lateral corners in segments 2 and 3 as in G. pulex. Eyes much larger, 
faintly reniform. Antenna 1 more than half as long as body, flagellum 32—35- 


jointed, more than twice as long as peduncle, accessory flagellum 4-jointed. 


Antenna 2 shorter than 1°, but more slender and elongate than in G. pulex, 
flagellum shorter than ultimate and penultimate joints of peduncle combined, 
12-jointed, with setae of uniform length. Gnathopods 1 and 2 as in G. pulex, but 
with 6% joint a little narrower, and peraeopods 1—5 rather more slender. Peraeo- 
pods 4 and 5, 24 joint with sinuous hind margin, rather abruptly narrowing 
distally. Uropod 3, rami more sparsely fringed with setae, the outer with 
several groups of spines on outer margin, the inner slender, not more than 


half as long as the 1% joint of outer. Telson apparently as in G. pulex. 


L. DO 8, d 12 mm. 


France (from a warm spring at the bottom of the Lae d’Anneey). 


27. G. hyacinthinus Dyb. 1874 @. h., B. Dybowsky in: Horae Soe. ent. Ross., 
v.10 suppl. p.70 | 1893 @. fluviatilis (part.)?, A. Della Valle in: F. Fl. Neapel, v,20 p.929. 


Pleon segments 4—6 each with dorsal spinules in 4 groups of 1, 2 
or 3 a-piece. Eyes rather large, reniform, black. Antenna 1 not half as long 
as body, flagellum thriee as long as peduncle, 28-jointed, accessory flagellum 
4-jointed. Antenna 2 °/, as long as antenna 1, flagellum 15-jointed. Gnatho- 
pods 1 and 2 not large, 6" joint in gnathopod 1 piriform, rather longer 
than tlıe oblong 6*" joint in gnathopod 2. Peraeopods 3—5, 24 joint tolerably 
broad, front and hind margins convex, the hind one ending below in a pointed 
corner. Uropods 1 and 2 reaching °/, length of uropod 3. Uropod 3 not 
very long, outer ramus with plumose setae only on the inner margin, inner 
about */, as long as outer, with plumose setae on both margins. Colour variable, 
greenish, yellowish, or bright reddish. L. 15 mm. 


Lake Baikal. Depth 100-300 m. 


28. G. syriacus Chevreux 1895 @. s., Chevreux in: Rev. biol. Nord France, 
0.7 p. 160 f. 


Body rather robust. Pleon segments 1—3 with some stiff dorsal setae, 
segments 4—6 each with a transverse elevation of hind margin armed with 
a variable number of spines, usually 2 median and 1 on each side in segments 4 
and 5, and only 1 on each side in segment 6; the spines accompanied by 
setae. Head, lateral lobes vertically truncate, the sinus below smaller 
than usual. Side-plates 1—4 deep, 4!" much deeper than broad. Pleon 
segments 1—3, postero-lateral corners acutely and uneinately produced, chiefly 


'in segment 3. Eyes of moderate size, reniform. Antenna 1 in d more than 


half as long as body, flagellum feebly armed, more than twice as long as 
peduncle, 40-jointed (21-jointed in Q ), aceessory flagellum 4-jointed. Antenna 2 
considerably shorter, ultimate joint of peduncle rather longer than penultimate, 
flagellum about 14-jointed, apparently without calceoli. Gnathopods 1 and 2 
as in G. pulex. Peraeopods1 and 2 with faseicles of long setae on hind margin. 
Peraeopods 3—5 robust, not elongate, 24 joint in peraeopod 3 with lower hind 
corner quadrate, in peraeopods 4 and 5 hind corner not free. Uropod 3, outer 
ramus fringed on outer margin with long plumose setae, inner ramus over 
”/,; as long as outer, with 1 or 2 spines and a fringe of short plumose setae 


476 Gammarus 


on inner margin. Telson much longer than broad, lobes each with 2 long: 
spines and some long setae on the apex, which is obliquely truncate from 
within; higher up are ‚2 fascicles of setae. L. 2 10, © reaching 19 mm. 


Syria. Fresh water. 


29. G. locusta (L.) 1758 Cancer l., Linne, Syst. Nat., ed.10 p.634 | 1775. 
Gammarus l., J. C. Fabrieius, Syst. Ent., p.418 | 1862 @. 1., Bate, Cat. Amphip. Brit. 
Mus., p. 206 t.86 £.6 | 1889 @. 1., A. M. Norman in: Ann. nat. Hist., ser.6 v.4 p. 137 
t.12 £.11 |] 1889 @. l., Hoek in: Tijdschr. Nederl. dierk. Ver., ser.2 v.2 p.206 t.7 £.10“; 
t.10 £.10, 10' | 1893 @. 1. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 759 .2 f.1; t.24 
f.20— 34; 1.45 £.1—11|1890&94 G.1., G.O.Sars, Crust. Norway, v.1t.1; p.499 t.176 £.1| 
1808 Cancer (G.)l., Montagu in: Tr. Linn. Soc. London, v.9 p.92 t.4 f.1 | 1766 Oniscus 
pulex (part.), Pallas, Misc. zool., p.190 | 1853 Gammarus p., Stimpson in: Smithson. Contr.,. 
v.6 nr.5 p.55 | 1820 @. arcticus (Leach in MS.), Scoresby, Account arct. Regions, v.1 
p.541 t.16 £.14 | 1821 & 24 @. boreus, E. Sabine in: W.E. Parry, J. Voy., Suppl. p. 51; 
p.229 | 1830 G. ornatus, H. Milne Edwards in: Ann. Sci. nat., v.20 p. 367, 369 t. 10- 
f.1-—8 | 1851 @. sitchensis, F. Brandt in: Middendorff, Reise Sibirien, v. 21 p. 187 
t.6 f.28a—e | 1855 G. mutatus, W. Liljeborg in: Vetensk. Ak. Handl., 1853 p. 447. 


Pleon segments 4--6 each with median dorsal elevation camying 
3—5 spinules, lateral groups well separated, each with 3 or 4 spinules. Head, 
lateral lobes angularly produced. Side-plates 1—4 larger than in G. marinus 
(p. 472), especially in Q ; side-plate 4 nearly as broad as deep. Pleon segments 2 
and 3, postero-lateral corners acutely produced. Eyes rather large, reniform, 

Palp black with chalky white coating. Antenna 1 in.Q 
not quite half as long as body, in J rather longer, 


€ 1°: joint subequal to 24 and 34 combined, flagellum 
Outer plate _ twice as long as peduncle, accessory flagellum about 
Inner plate 8-jointed. Antenna 2 shorter, flagellum about as long as 


ultimate and penultimate joints of pedunele combined, 

with calceoliind. Gnathopods 1 and 2 in 9, 6" joint 

Fig. 87. Fig.ss. oblong, in gnathopod 2 longer and narrower. Gnatho- 

Fig. 87&88. G. locusta. pod 1 in 3, 6! joint piriform; gnathopod 2, 6% joint 

after H 7 Hansen) Much more powerful, irregularly oblong, palm oblique 

though less so than in gnathopod 1, in both with strong 

spine at centre. Peraeopods 3—5 rather slender and elongate, 24 joint in peraeo- 

pod 3 forming a free corner, which is produced to an acute point. Uropod 3 

elongate, rami fringed with plumose setae and several spines, inner ramus nearly 

equal to 1% joint of outer. Telson longer than broad, each lobe with 3 apical spines. 

and a seta, a spine and seta near the apex, and near the base 2 or 3 spines 

and one or two setae. Colour more or less dark brownish green, with-pinkish 

mark on sides of pleon segments 1—3. L. S 20— (aretie mei 48 mm, 
o usually considerably smaller. 


Arctie Ocean, North-Atlantie with adjoining seas (East of United States of America, 
Europe). From shore to 100 m. 


30. G. camylops Leach 1813/14 @. c., Leach in: Edinb. Ene., v.7 p.403 | 1815 
@. campylops, Leach in: Tr. Linn. Soe. London, v.11 p.860 | 1862 @. c., Bate & Westwood, 
Brit. sess. Crust., ©. 1 p. 875 f..| 1894 @. e., G. O. Sars, Orust. Norway, v.1 p.500 t. 176 
f.2|1819 @. camptolops, (Leach in:) Samouelle, Ent. Compend., p. 104 | 1862 @. c., Bate,, 
Cat. Amphip. Brit. Mus., p.209 t.37 f.3 | 1830 @. camphylops, H. Milne Edwards in: 
Ann. Sei. nat., v.20 p. 367. 


Pleon segments 4—6 each with 2 median dorsal spinules and 2 on 
each side. Head, lateral lobes rather obliquely truncate, with very small 


ne ln mh Wen hun at A min Aue a. dh 4 
Se N ONE sie TE ENGEN " - a an Bi; ENDE ET 
md {m . > ’ a 2a £ > Au - rw: 4 DAT an m 
” 4 Fr re er ig BET Den ln Me B Ü ” “ £. r Eu); 
Mr} % Th da a ee ne Dr a nn" a in BE > 
. r ara eh eis a 5 vr IE FRE 1 Hindi ee ie ae 


Gammarus, Poekilogammarus 477 


sinus below. Side-plates 1—4 rather small, 4!" not nearly so broad as 
‚deep. Pleon segments 2 and 3, postero-lateral corners acute, but little 


produced. Eyes constrieted in the middle, slightly sigmoid, very dark. 
Antenna 1 fully half as long as body, 1° joint rather longer than 24 and 34 
combined, flagellum nearly thrice as long as pedunele, accessory flagellum about 
6-jointed. Antenna 2 shorter, flagellum in S with no apparent calceoli. 
Gmathopods 1 and 2 as in G. locusta, except that gnathopod 2 has 6!% joint 


in © rather shorter and in J less obliquely truneated. Peraeopods 3—5 


rather slender and elongate, 2° joint in peraeopod 3 with lower hind corner 
nearly quadrate. Uropod 3, inner ramus not nearly as long as 1° joint of 
outer, and with fewer spines than in G. locusta. Telson scarcely so long 
.as broad, lobes divergent, each with 3 apical spines, and on outer margin 
l spine' near apex and 1 near base. Colour semipellucid, pale greenish 
with the usual pink markings faintly indieated. L. 9 scarcely over 6 mm, 
O smaller. 
North-Atlantie, North-Sea and Skagerrak (South-Norway, in oyster-bed above sea- 
level; in shallow water at Christianiafjord; Isle of Arran; Shetland; Belfast); Kuttegat. 


G. tunetanus E. Sim. 1886 @. £., E. Simon in: Expl. Tunisie, Crust. p.6 | 1893 
@. fluviatilis (part.)?, A. Della Valle in: F. Fl. Neapel, ©.20 p. 768. 

Said to differ from G. pulex (p.474) by having integument more sparingly and very 
minutely punctate, head a little longer and in front a little attenuate, eyes more 
elongate reniform, extending a little over the base of the antennae, accessory flagellum 
of antenna 1 longer, 6-jointed, reaching 6th joint of primary flagellum, 3d, 4th and 
5th joints a little longer than the rest, equal to one another, flagellum of antenna 2 
shorter, 8-jointed, all the joints a little longer than broad. From G. locusta it is 
said to differ by the much shorter flagellum of antenna 2, with the joints fewer and 
almost smooth. 


Tunis (Kerouan). 


45. Gen. Poekilogammarus Stebb. 
1899 Poekilogammarus, T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 428. 


In general like Gammarus (p. 460), but usually with dorsal hairs or 
spinules on all segments of peraeon and pleon, and head rostrate. Antenna 1 
with peduncle longer than peduncle of antenna 2, 34 joint longer than 24. 


- Upper lip with wide, almost straight, apical margin; lower lip as in Axelboeckia 


(p. 391), the prineipal lobes separated by what may be regarded as rudimentary 
inner lobes. Maxilla 1, inner plate with about 6 setae. Maxillipeds, outer 
plates not reaching far along 34 joint of palp. Gnathopod 1, 6% joint larger 
than in gnathopod 2. Uropod 3 with equal rami, both carrying plumose 
setae, outer ramus 1-jointed. ix 
4 species, 
Synopsis of species: ' 
Only pleon segments d—6 ke dorsal spinules; head 

DSB TOBLFALD Bee erh Ppietus.-+.27Ppr428 


iss han of peraeon and pleon with setules or spinules; 
head rostrate — 2. 


1 


Peraeopod 5, 2d joint rather broad — 3. 


DE RE RO N en rn. 3. P.talitrus . . p. 478 


Bose EBEN übtune: si: 272 Sn 4. P. araneolus . p.479 


9 ve Peraeopod 5, 24 joint slender. . .. ......2.... 2. P. orchestes . p. 478 
2 


478 Poekilogammarus 


1. P. pietus (Dyb.) 1874 Gammarus p. + Var. «a + Var. 8, B. Dybowsky in: 
Horae Soe. ent. Ross., v.10 suppl. p.108 t.12 f.3; p.104 t.12 f.2(juv.) | 1899 Poekilo- 
gammarus p., T. Stebbing in: Tr. Linn. Soe. London, ser. 2 v.7 p.428 | 1895 Gammarus 
fluviatilis (part.)?, A. Della Valle in: F, Fl. Neapel, v.20 p. 930, 


Pleon segments 4—6 with delicate dorsal spines. Head in front almost 
straight, rostral point scarcely indieated. Eyes moderately large, very 
prominent, as if set on tubercles, oval, black or brown. Antenna 1 longer 
than ?/, body (in young speeimens longer than body), more than twice as long as 
antenna 2, 24 joint only about ?/, as long as 34, flagellum 41—58-jointed, . 
accessory flagellum 6-jointed. Antenna 2, ultimate joint of peduncle rather 
shorter than penultimate, flagellum 9—-I1-jointed. Gmathopods 1 and 2 
‚little differing in size or even in shape, 6% joint oblong, with palm more 
oblique in gnathopod 1, hind margin longer in gnathopod 2, and 'the joint 
slightly widening to the palm. Peraeopods 3—-5, 24 joint not very wide, 
narrowing gradually from above downward, hind margin setose. Uropod 1 
reachiug end of uropod 3. Uropod 3 moderately long, the 1-jointed equal 
rami fringed with plumose setae. Colour whitish yellow, variegated, with 
brownish or greenish yellow markings. L. 32 mm. 


Lake Baikal. Depth 50-100 m. 


2. P. orchestes (Dyb.) 1874 Gammarus o., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.104 | 1899 Poekilogammarus o., T. Stebbing in: Tr. Linn. Soe. 
London, ser.2 v.7 p.428 | 1898 Gammarus pietus (part.)?, A. Della Valle in: F. Fl. 
Neapel, v.20 p. 929. 


Segments Of peraeon each provided with 2—4 delicate setae; segments 
of pleon completely covered with them. Head with middle dorsal line 
convex, rostrum short, projeeting with a slightly downward direeted curve, 
its apex obtuse. Eyes rather small, prominent, ovate, a little narrowed above, 
black. Antenna 1 a little shorter than body, almost twice as long as antenna 2, 24 
joint about */, shorter than 34, flagellum not twice as long as pedunele, 21-jointed, 
accessory flagellum 2-jointed. Antenna 2, ultimate and penultimate joints 
of peduncle subequal, flagellum shorter than pedunele, 7-jointed. Gnathopod 1, 
6" joint piriform. Gnathopod 2, 6t joint oblong. Peraeopods 3—5, 24 joint 
slender, in front convex with long pendent setae, behind flatly concave or 
straight, with 5 or 6 setules. Uropods 1 and 2 scarcely reaching middle 
of uropod 3. Uropod 3 rather long, '/,—'/, as long as body. Colour yellow, 
spotted with yellow‘brown. L. about 10 mm. 

Lake Baikal. Depth 150 m. 


3. P. talitrus (Dyb.) 1874 Gammarus t., B. Dybowsky in: Horae Soc. ent. 
Ross., v. 10 suppl. p.105 t.11 f.5 | 1899 Poekilogammarus t., T. Stebbing in: Tr. Linn. 
Soc. London, ser.2 v.7 p.428 | 1893 Gammarus pictus (part.)?, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 930. 


Segments of peraeon each with 2—4 delicate setae; segments of pleon with 
delicate, irregularly arranged setae on surface and hind margin. Head with 
a rather long, straight, acute rostrum, downward bent only near the point. 
Eyes moderately large, prominent, elongate oval, slightly narrowed below, not 
far apart above, black. Antenna 1 about thrice as long as antenna 2, in J about 
as long as body, in Q rather shorter, 24 joint about */, shorter than 34, flagellum 
more than twice as long as peduncle, 28—39-jointed, accessory flagellum 
3—6-jointed. Antenna 2, ultimate and penultimate joints of pedunele sub- 
equal, flagellum shorter than pedunele, 11-jointed. Gnathopod '1, 6!" joint 


war N AmpE 


Poekilogammarus, Echinogammarus 479 


piriform (in figure oblong oval). Gmnathopod 2, 6" joint narrowly oblong, 
nearly 3 times as long as 5th joint. Peraeopods 3—5, 2% joint moderately 
broad, in peraeopod 5 with 7 or 8 rather long setae on front and hind 
margins (in figure rather wider above than below, hind and lower margins 
nearly straight). Uropod 1 reaching much beyond uropod 2, but scarcely 
to middle of uropod 3. Uropod 3 '/,—'/, as long as body. Colour bright 
yellow with bright brown spots. L. about 14 mm. 


Lake Baikal. Depth 100—200 m. 


4. P. araneolus (Dyb.) 1874 Gammarus a. + @. a. var. qwinquefasciatus + 
@. a. var. ephippiatus, B. Dybowsky in: Horae Soc. ent. Ross., v.10 suppl. p.106 t.11 
£.3; p.107 t.11 £.7; p.107 t.11 f.8 | 1899 Poekilogammarus a., T. ae? in: Tr. 
Lan. Soe. London, ser.2 v.7 p.428 | 1893 Gammarus Auviatilis (part.)?, @. pietus 
(part.)?, A. Della Valle in: .F. Fl. Neapel, v.20 p.927; p. 928, 930. 


All segments of peraeon and pleon carrying short dorsal setae or very 
thin spinules; on peraeon segments 1—6 the setae generally on the hind 
margin, on peraeon segment 7 and pleon segments 1—6 over all the 
dorsal surface (fewer setae in var. ephippiatus). Head as in P. orchestes. 
Eyes large, prominent, ovate, slightly narrowed below, black. Antenna 1 
only half as long as'body, twice as long as antenna 2, 24 joint a little shorter 
than 34, flagellum about twice as long as peduncle, 19—25-jointed, accessory » 
flagellum 3- or 4-jointed. Antenna 2, ultimate and penultimate joints of 
pedunele subequal, flagellum shorter than pedunele, 5—8-jointed. Gnathopod 1, 
‚6b joint piriform. Gmathopod 2, 5" joint not elongate, 6% oblong, in C 
widening to the palm. Peraeopods 3—5, 24 joint tolerably broad, front 
and hind margins 'feebly convex, hind 'margin with short setae. Uropod 1 
reaching end of uropod, 3, uropod 2 only end of peduncle of uropod 3. 
'Uropod 3 tolerably long, '/, as long as body. Colour bright green or bright 
'greenish. yellow with brownish yellow spots; in var. quinguefaseiatus, trans- 
versely banded, head and peraeon segments 1—3 reddish brown, segmeats 4 
and 5 bright yellow, segments 6 and 7 and pleon segments 1 and 2 brown, 
pleon segments 3—6 and telson bright yellow, uropod 3 brown; in var. 
ephippiatus brownish yellow or dark green, with a saddle-like brightening 
of peraeon segments 6 and 7. L. 11—14 mm. 


Lake Baikal. Depth 10—50 m. 


53 
T 
i 
, 

2 
$ 
3 
2 


46. Gen. Echinogammarus Stebb. 


1793 [Sübgen.] Gammarellus (part.). J. #. W. Herbst, Naturg. Krabben Krebse, v.2 
‘'p.106 | 1899 Echinogammarus, T. Stebbing in: Tr. Linn. Soc. London, ser.2 0.7 p.428. 


In general like Gammarus (p. 460), but with dorsal spines on segments 
anterior to pleon segment 4 (Fig. 89 p.481), antenna 1 the longer, with 
peduncle shorter than peduncle of antenna 2, and 6tk joint of gnathopod 1 
almost always larger than that of gnathopod 2. 


27 accepted and 1 doubtful species. 
"Synopsis of accepted speeies: 
long as outer — 2. 


Uropod 3, inner ramus-about half as long as 
| outer — 10. 


| Uropod 3, inner ramus much less than half as 


Uropod 3, inner ramus much more than half 
as long as outer — 14. 


480 


jr 
men 


N 
oO 


DD 
je 


[So] 
DD 


—— 


—— — —— — —— 


Echinogammarus 


Gnathopod 1, 6th joint smaller than that of 
gnathopäd ER N ee ea 


Gnathopod 1, sth Stat 1 than that of. 


guathopbd 2 — 8 


Pleon elosely beset with spines. ...... 
Pleon with spines not closely set — 4. 


Uropod Babel, rast 
Uropod 3 long — 5. 


Uropod 8, outer ramus abnormally long. . . 


Uropod 3, outer ramus not abnormally long — 6. 


Antenna 1 eonsiderably more than half as long 
as body — 7. 
Antenna ! about half as long as body — 9. 


Uropod 3 with setae short, separate . ... . 


Uropod 3 with setae long, in fascicles — 8. 


Pleon segments 1 and 2, dorsal spinules not 
confined to hind margin .....2.. 
Pleon segments l and 2, dorsal spinules Saal 
unless on hind margin . . ERDE 
Pleon segment 3 with long dorsal hairs. . . 

Pleon segment 3 without dorsal hairs . . 


Pleon segment 1 without spines 

Pleon segment 1 with spines — 11. 
Gnathopod 2, 6th joint piriform . ».... 
Gnathopod 2, 6th joint oblong — 12. 

Pleon segment 3 without lateral ridge. 
Pleon segment 3 with lateral ridge — 18. 
Bank of: PIBORFWBHF.. N 5:4 Zi uk 
Back of pleon not warty.. .. 2... 
Peraeon segment 7 dorsally spinose — 15. 
Peraeon segment 7 not dorsally spinose — 19. 


Eyes shaped like a retort . 2. ...2.2..» 
Eyes reniform — 16. 

Peraeon segment 7, spines in a continuous series 
Peraeon segment 7, spines in groups — 17. 
Peraeon segment 7, spines in 6 groups . . 
Peraeon segment 7, spines in 2 groups — 18. 


Eyes narrowly reniform . % 

Eyes broadly reniform. .. ... 

Eyes irregularly shaped 

Eyes regularly shaped — 20. 

Antenna 1 little longer than antenna 2, about 
half as long as body — 21. 

Antenna 1 much longer than antenna 2, much 
more than half as long as body —- 22. 


No pleon segment with more than one row 
of dorsal spinules 

Some segments of pleon with more ma one 
row of dorsal spinules 2... .... 


Eyes white; antenna 1 more than twice as 
long as body ENT a 

Eyes black or die: antenna 1 less than 
twice as long as body — 23. 


1. E. berilloni . p. 481 
2. E. verrucosus . . . p.481 
3. E. saphirinus « p. 482 
4. E. czerskii. . . p.482 
5. E.maackii . . . . . p.483 
6. B.lividus . . . ... p.483 
T. Bvidlb .. 5224 p- 484 
8. E. ceyaneus. . p- 484 
9. E. ochotensis . pP. 484 
10. E. testaceus . . . . p.485 
11. E. sophiae . . p. 485 
12. E. fuseus FE 486 
13. E. murinus ..p. 486 
14. E. aheneus. . . pP. 487 
15. E.sarmatus :. . . . p.487 
16. E. capreolus. . . . p.488 
17. E. ussolzewii . pP. 488 
18. E. stenophthalmus . p. 489 
19. E. schamanensis . . p. 489 
20. E. leptocerus pP. 490 
21. E. toxophthalmus . p. 490 
22. E,vittatus. .. . . p. 491 
23. E. petersi . ....p.491 


Pr a en area se 24. E. violaceus . : . . p.492 
Eyes large — 24. 
Uropod 3, outer ramus little longer than inner 25. E.ibex . ..... p- 492 
24 | Uropod 3, outer ramus considerably longer 
than inner — 285. 
. f Gnathopod 1, 6th joint much inflated at base. 26. E. parvexii . . . . p.493 
2 \ Gnathopod 1, 6th joint not inflated at base . 27. E. polyarthrus. . . p.493 


1. E. berilloni (Catta) 1878 Gammarus b., Catta in: Bull. Soc. Borda | 1896 
@.b., Chevreux in: Bull. Soe. zool. France, v.21 p.29 f. | 1899 Echinogammarus b., 
T. Stebbing in: Tr. Linn. Soe. London, ser. 2 v.7 p.429 | 1893 Gammarus barilloni, 
A. Della Valle in: F. Fl. Neapel, v.20 p. 765. 


Form of body nearly as in Gammarus pulex (p. 474). Peraeon seg- 
ment 7 sometimes with dorsal spines; pleon segments 1—3 with dorsal 
spines in great numbers mingled with setae (only with setae in one J spe- 
cimen (Chevreux)); 30—50 spines on segment 2, 4—8 dorsal spines on 
segment 4, 2—4 on segment 5, 2 or 3 on segment 6. Head, post-antennal 
angles acute. Pleon segment 3, postero-lateral corners acute. Eyes large, 
reniform. Antenna 1 not much longer than antenna 2, 1° joint not much 
longer than 24, flagellum 25—30-jointed, accessory flagellum with 6 very 
short joints. Antenna 2, ultimate and penultimate joints of pedunele long, 
subequal, flagellum shorter than both combined, without calceoli. Gnathopod 1, 
6th joint oval, palm oblique, scarcely distinet from hind margin. Gnathopod 2 
. in both sexes much larger than gnathopod 1, in S 6% joint of the same shape 
as in gnathopod 1, in Q more vblong, palm well defined from hind margin, emar- 
ginate in the centre. Peraeopod 1 strongly setose on hind margin, setae much 
longer than on peraeopod 2. Peraeopods 3—5 shorter and more robust than in 
Gammarus pulex, with fascicles of long setae. Uropod 3, outer ramus very 
elongate, with long setae and fascieles of spines on the margin, 24 joint 
obsolete, inner ramus not '/, length of outer, carrying a few setae and an 
apical spinule. Telson broader than long, lobes divergent, each with 2 spines 
and many setae at narrowly truncate apex, and usually with 1 spine on outer 
margin. Colour greenish brown or reddish brown. L. O0 7 mm, d 10—12 mm. 


Pyrenees, to a height of 750 m; Jersey. Streams. 


2. E. verrucosus (Gerstf.) 1858 Gammarus v., Gerstfeldt in: M&m. pres. Ac. 
St.-Petersb., v.8 p.282 | 1862 @. v., Bate, Cat. Amphip. Brit. Mus., p.219 1.39 £.1 | 1874 
@. v., B. Dybowsky in: Horae Soe. ent. Ross., 0.10 suppl. p.67 t.4 f.12]| 
1888 @. v., T. Stebbing in: Rep. Voy. Challenger, v.29 p.309 | 1899 
Echinogammarus v., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 
p. 429 | 1898 Gammarus pungens (part.)?, A. Della Valle in: F. Fl. 
Neapel, v.20 p.768. 


Pleon segments 1—6 (Fig. 89) pectinate with rows of 
spinules on rather obliquely set ridge-like or tubercular dorsal 
prominences, usually forming 3 transverse series (spines 54) on 
segment 1, 5 series (spines 89) on segment 2, 5 series (spines 100) 
on segment 3, 2 series on each of segments 4—6 (spines 32, 
24, 12). Pleon segment 3, postero-lateral corners approximately 
quadrate (produced into long upturned tooth, Bate, but?). Eyes flat, Fig. 89. 
almost linear reniform, black. Antenna 1 not much longer than eh ger eaiz 
. antenna 2, flagellum 35—59-jointed, accessory flagellum 4—10-. pleon. [After 
jointed. Antenna 2, flagellum 15—26-jointed, short, broad, flattened, #- Pybowsky.] 
with calceoli in both sexes. Gnathopods 1 and 2, 6% joint tolerably roundish- 
triangular (authors’ accounts differ). Peraeopods 3—5, 24 joint moderately 


Das Tierreich. 21.Lief.: T. R.R. Stebbing, Amphipoda I. 31 


482 Echinogammarus 


expanded, hind margin slightly sinuous, not produced. Uropods 1 and 2 short. 
Uropod 3 long, outer ramus 6 or 7 times as long as the inner, with spines and 
fascicles of long setae on both margins. Telson (Fig. 89) as in. E. berilloni 
(p. 481). Colour greenish to yellowish, with a narrow brownish stripe on 
hind margin of each segment. L. reaching 43 mm. 


Lake Baikal, River Angara. 


3. E. saphirinus (Dyb.) 1874 Gammarus s., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.98 | 1899 Echinogammarus s., T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 v.7 p.429 | 1893 Gammarus fluviatilis (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p. 930. 


o unknown. — d. Peraeon segment-7 with 2 little groups of 2 or 3 
spines on hind margin; pleon segments 1—6 each with dorsal spines in 
2—4 groups adjoining hind margin, spines 18—22 on segment 1, 18—24 
on segment 2, 18—20 on segment 3, 6—12 on segment 4, 8—6 on seg- 
ment 5, 4 on segment 6. Eyes irregularly reniform, long, narrow, upper 
end a little emarginate, reaching high on top of head, reddish, invisible in spirit. 
Antenna 1 nearly as long as body, thrice as long as antenna 2, flagellum 87-jointed, 
accessory flagellum 8-jointed. Antenna 2, flagellum 16-jointed. Gnathopod 1, 
6th joint piriform, larger than the oblong 6!" joint of gnathopod 2. Peraeo- 
pods 3—5, 24 joint broad, hind margin convex, carrying 8—10 short setae, 
lower corner projecting. Uropods 1 and 2 short, but uropod 1 reaching as 
far back as tbe short uropod 3, in which the inner ramus is about °/, as long 
as outer; both earıying a few simple setae. Telson not described. Colour 
a very delicate sapphire-blue L. 18 mm. 


Lake Baikal. Depth 300 m. 


4. E. ezerskii (Dyb.) 1874 Gammarus c., B. Dybowsky in: Horae Soe. ent. Ross., 
v.10 suppl. p.94 t.1 f.2; 1.3 f.8 | 1899 Echinogammarus c., T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 ©.7 p.429 | 1898 Gammarus pungens (part.)?, A. Della Valle in: 
F. Fl. Neapel, ©.20 p. 928. 


Pleon segments 1—6 with regular little pectinate groups of spines on 
weak elevations scarcely oblique to the adjacent hind margin, on segment 1 
usually 4 groups (2 median, 2 lateral), each with 3 or 4 spines, on segments 
2 and 3 a row of4 groups, preceded by 2 or 3 rows consisting each of 2 groups, 
on segment 4 a row of 3 groups, preceded by a row of 2 groups, on seg- 
ments 5 and 6 a row of 3 groups. Each group has usually 3 or 4 spines, 
sometimes on segment 6 only 1 or 2. Eyes long reniform, widened below, 
black. Antenna 1 longer than the body, 1° joint rather shorter than 24, 
and only half as long as ultimate joint of peduncle of antenna 2, flagellum 
90-jointed, accessory flagellum 7—-10-jointed. Antenna 2, ultimate joint of 
peduncle rather longer than penultimate, flagellum 20—28-jointed. Gnatho- 
pod 1, 6% joint piriform, much larger than the narrowly oblong 6th joint ofgnatho- 
pod 2. Peraeopods 3—5, 24 joint narrow, hind margin slightly convex, 
lower angle very shortly produced. Uropods 1 and 2 long, uropod 1 reaching 
the first or even the last quarter of uropod 3. Uropod 3 very long, easily 
detachable, ?°/, as long as body, outer ramus 9 times as long as inner, slightly 


bent, rind with long, simple setae. Colour, red above, violet below, 


appendages violet. L. about 28 mm. 
Lake Baikal. Depth 5—8 m. 


VE TPERT WW 


Echinogammarus 483 


5. E. maackii (Gersif.) 1858 Gammarus m., Gerstfeldt in: M&m. pres. Ac. 
St.-Pötersb., v.8 p.283 | 1862 @. m., Bate, Cat. Amphip. Brit. Mus., p.217 t.38 f.8| 
1874 G. m., B. Dybowsky in: Horae Soc. ent. Ross., v.10 suppl. p.97 | 1888 G. m., 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.309 | 1899 Echinogammarus m., T. Stebbing 
in: Tr. Linn. Soc. London, ser. 2 v.7 p.429 | 1893 Gammarus pungens (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p. 764. 


Pleon segments 1—6 with spines Bee arranged on ridges; on 
segment 1 are 2 oblique lateral ridges, each with 5—8 spines, on segments 2 
and 3 the lateral ridges are longer, each with 7 or 8 spines commonly 
divided into two sets, of which the front is smaller than the hinder, also there 
are often 2 little median humps, or on segment 3 two pairs of them, each with 2 or 
3 spines; segments 4—6 have the ridges short, each with 3—6 spines, 
and 2 little median humps, each with 1 or 2 spines. Eyes narrowly reniform, 
black. Antenna 1 about °®/, as long as body, 1° joint shorter than ultimate 
joint of pedunele of antenna 2, flagellum 40—54-jointed, accessory flagellum 
4- or 5-jointed. Antenna 2, flagellum 14—17-jointed. Gnathopods 1 and 2, 
6% joint piriform, larger in gnathopod 1 than in gnathopod 2 (authors’ accounts 
differ). Peraeopods 3—5, 24 joint moderately broad, hind margin sinuous, 
ending in blunt, little projeeting corner. Uropod 1 reaching end of pedunele 
of uropod 3. Uropod 3 long, '/, as long as body, distinguished by paueity 
of setae, which are short and scattered, inner ramus scarcely */,, as long 
as outer. Colour, body green, appendages red. L. about 28 mm. 

River Angara at Irkutsk; Lake Baikal, depth !/s,—2 m. | 


6. E.lividus (Dyb.) 1874 Gammarus l., B. Dybowsky in: Horae Soe. ent. Ross., 
v.10 suppl. p.68 t.6 f.1 | 1899 Echinogammarus I., T. Stebbing in: Tr. Linn. Soc. 
London, ser.2 v.7 p.429 | 1893 Gammarus pungens (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 929. 


Pleon segments 1—6 with spines, segment 1, hind row in 4 groups, 
each with 4—6, front in 2 groups, each with 4 spines; segment 2, hind 
row as in segment 1, preceded by 3 rows, each forming 2 widely separated 
groups; segment 3 like segment 2, but with occasional addition of some 
intermediate groups; segment 4, hind row with a middle and 2 lateral 
groups, front with 2 middle and 2 lateral groups; segments 5 and 6 each 
with a middle and. 2 lateral groups in 1 row. Eyes flat, long reniform, 
below a little widened and truncate or slightly emarginate, black. Antenna 1 
about °/, as long as body, peduncle shorter than peduncle of antenna 2, 
1% joint rather shorter than 24, flagellum with 46—60 joints in Q, 52—70 in 
ÖS, accessory flagellum 5—9-jointed. Antenna 2, ultimate joint of peduncle 
slightly longer than penultimate, flagellum shorter than both combined, with 
6—20 joints in Q,16—26 in J, carrying calceoli in both sexes. Gnathopod 1, 
5th joint as broad as long, about °/, as long as the narrowly piriform 6tk, 
Gnathopod 2, 5!k and 6 joints together as long as those of gnathopod 1 
but much narrower, 5!" joint ?/, as long as the narrowly oblong 6, which 
has a short, well defined, almost truncate palm. Peraeopods 3—5, 24 joint 
moderately broad, hind margin slightly convex or sinuous, ending often in 
a minutely produced angle. Uropod 1 reaching '/, ofuropod 3, which is rather 
long, outer ramus 6 or 7 times as long as inner, with spines and fascieles 
of long simple setae on both margins. Telson (in figure) much longer 
than broad, each lobe with a spine high up on outer margin and 3 spines 
on the narrow apex. Colour violet-blue or greenish violet, often with metallie 
glance, antennae 1 and 2 and uropod 3 red or violet-brown. L. 40 mm. 

Lake Baikal. Depth 1—10 m. 


31* 


484 Echinogammarus 


7. E. viridis (Dyb.) 1874 Gammarus v. + @. v. var. canus + @. v. var. olivaceus, 
B. Dybowsky in: Horae Soc. ent. Ross., o. 10 suppl. p.95 t.6 f.2; p.95 t.5 f.3, t.4 £.4; 
p-95 | 1899 Echinogammarus v., T. Stebbing in: Tr. Linn. Soc, London, ser.2 0.7 p.429 | 
1893 Gammarus fluviatilis (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 931. 


Pleon segments 1 and 2, spines usually arranged in 2 groups close 
to hind margin (wanting on segment 1 in var. canus, and on both segments 
in var. olivaceus); segment 3, spines in 2—4 transverse series, on the hind- 
most forming oblique lateral groups, but middle groups almost parallel to 
the hind margin, in the front rows middle groups sometimes wanting; 
segment 4, spines in 1 or 2 series, consisting each of 2 middle and 2 lateral 
groups; segments 5 and 6 each with only 1 such row. The ridges or humps 
generally feeble, in young specimens scarcely indieated; number of spines 
in each group variable, encreasing with age. Eyes reniform, black. Antennae 1 
and 2, gnathopods 1 and 2 and peraeopods 3—5 differing little from those 
of E. lividus (p. 483), but antenna 1, accessory flagellum 4—6-jointed, antenna 2, 
ultimate joint of peduncle more deeidedly longer than penultimate, gnatho- 
pod 1, 6!" joint thrice as long as 5t#, the 2 combined longer than 5t" and 
6th of gnathopod 2, which are comparatively wider than in E. lividus, as is 
also 24 joint of peraeopods 3—5. Antenna 1 comparatively shorter, with 
fewer joints to the flagellum in the two varieties. . Uropod 1 almost reaches the 
end of the inner ramus of uropod 3, which is tolerably long, the outer ramus 
about 3—5 times as long as (figure; in text: '/,—"/, longer than) the inner, 
carrying marginal spines and simple setae. Telson (in figure) less elongate than 
in E. lividus. Colour varying from bright grass-green to dark olive-green, 
appendages red, horn-yellow to horn-brown. L. 24—31 mm. 


Lake Baikal, shore to 20 m; River Anyara. 


8. E. cyaneus (Dyb.) 1874 Gammarus c., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.92.| 1899 Echinogammarus ce., T. Stebbing in: Tr. Linn. Soc. 
London, ser.2 v.7 p.429 | 1893 Gammarus pungens (part.)?, A. Della Valle in: F. Fl. 
Neapel, v.20 p. 928. 


Pleon segment 1 with 2—6 delicate spinules on hind margin; segment 2 
with 6—8 somewhat more conspieuous, but still setiform spines on hind margin; 
segment 3, whole dorsal surface set with long setae, among which the spines, 
if present, completely disappear; segments 4—6 less setose, spines stronger, 
on segment 4 forming 2 middle and 2 lateral groups, on segments 5 and 6, 
1 median and 2 lateral groups, number of spines to a group 2—4. Eyes 
slightly reniform, black. Antenna 1 about ’/, as long as body, flagellum 
24—35-jointed, accessory flagellum 4- or 5-jointed. Antenna 2, flagellum 
11—13-jointed. Gmathopod 1 piriform, gnathopod 2 oblong. Gnathopod 1 
in J longer and broader than gnathopod 2, in © rather broader but not 
longer. Peraeopods 3—5, 24 joint tolerably broad, hind margin slightly 
convex, carrying 8—10 short setae, ending in a projeeting acute angle. Uropods1 
and 2 about reaching end of inner ramus of uropod 3. Uropod 3 moderately 
long, outer ramus 3 or 4 times longer than inner, both with simple marginal 
setae. Colour bluish. L. 18 mm. 


Lake Baikal. Near the shore, under stones. 


9. E. ochotensis (F. Brandt) 1851 Gammarus o., F. Brandt in: Middendorff, 
Reise Sibirien, 21 p.140 t.6 f.öla—c | 1862 @.o., Bate, Cat. Amphip. Brit. Mus., 
p. 216 t.38 f.5 | 1899 Echinogammarus o., T. Stebbing in: Tr. Linn. Soc. London, ser.2 
v.7 p.429 | 1895 Gammarus marinus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.762. 


Eehinogammarus 485 


Pleon segments 1 and 2 more or less elearly furnished in the middle of 
the hinder dorsal margin with a median forward and 2 lateral hinder u 
of spinules on low elevations; segment 3 having these preceded by 2 or 3 
pairs of similar elevations carrying 4 or 5 spinules each; segments 4 and 5 
each with a pair of slightly curved ridges pectinate “with 5 or 6 spines, 
segment 4 having also 2 smaller lateral elevations with 2 or 3 spines each; 
segment 6 with a median pair of spines and 3 in a row on each side. 
Eyes slightly reniform. Antenna 1 about !/, as long as body, rather longer 
than antenna 2, flagellum 30—32-jointed, much longer than peduncle, accessory 
flagellum about '/, length of primary. Antenna 2, ultimate and penultimate joints 
of peduncle long, subequal, flagellum 20-jointed. Gnathopods 1 and 2 subequal, 
6b joint moderately convex, almost rhomboidal, palm set with spines, more 
or less straight truncate (Brandt). Peraeopods tolerably strong, with short 
setae and spines. Uropod 1 moderately long and broad, reaching about the 
middle of uropod 3. Uropod 3, outer ramus about twice as long as telson, 
thrice as long as inner ramus. Telson conical, each lobe with spines on 


the blunt apex. IL. reaching 25 mm. 


Ochotsk Bay [Siberia]. 


10. E. testaceus (Dyb.) 1874 Gammarus t., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.60 | 1899 Echinogammarus t., T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 v.7 p.429 | 1893 Gammarus fluviatilis (part.)?, A. Della Valle in: F. Fl. Neapel, 
v.20 p. 931. 


Pleon segment 1 without spines; segment 2 with a pair of lateral 
groups of 5 or 6 spines each; segments 3 and 4 and often 5 with 2 transverse 
rows, the hinder eomposed of 2 middle and 2 lateral groups, the front generally 
only of 2 lateral groups; segments 3—6 or 4 and 5 sometimes having the middle 
and lateral group on each side coalesced; segment 6 with spines. Eyes narrowly 
reniform, somewhat widened below, black. Antenna 1 shorter than body, 
twice as long as antenna 2, flagellum with 32 joints in Oo, t0o50in G, accessory 
flagellum with 4 joints in 9, to 7 in d. Antenna 2, flagellum with 11 Jeints in 
9,t0o 23 in d, carrying calceoli. Gnathopod 1, 6 joint piriform, somewhat 
larger than the oblong 6! of gnathopod 2. Peraeopods 3—5, 24 joint broad, 
hind margin convex, ending below with projecting angle. Uropod 1 reaches 
middle of uropod 3, inner ramus about '/,—?/, as long as the 2-jointed 


‘ outer, which has simple setae on its outer margin, but plumose ones also 


on the inner. Colour dark brownish, passing into greenish, the whole body 
spotted with yellow or bright greenish. L. Q 12—13, 9 21 mm. 
Lake Baikal (southern shore). 


11. E.sophiae (Dyb.) 1874 Gammarus s., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.61 | 1899 Echinogammarus s., T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 v.7 p.429 | 1895 Gammarus flwviatilis (part.)?, A. Della Valle in: F. Fl. Neapel, 
v.20 p. 980. 


Pleon segments 1—3, spines on hind margin in a pair of lateral 
groups, 2 or 3 spines to a group; segments 4—6 each with only 3 or 4 delicate 
spinules, 1 or 2 in the median line, and 1 on each side in the place of 
lateral groups. Eyes small, oval or reniform, black. Antenna 1 nearly ?/, 
as long as body, 1° joint shorter than 24, flagellum 17—30-jointed, accessory 
flagellum 3—6-jointed. Antenna 2, flagellum 8—14-jointed, with calceoli. 
Gnathopods 1 and 2, 6tk joint piriform, larger and stronger in gnathopod 1 than 
in gnathopod 2, and somewhat tumid at the base. Peraeopods 3—5, 24 joint 


& 


a TEEN a 
TEEN ER RETR 
ae aa Kae IN FE 


486 Echinogammarus 


slender, - hind margin slightly sinuous, not produced to an angle below. 
Uropod 1 reaches beyond middle of uropod 3. "Uropod 3, outer ramus about 
twice as long as inner, with plumose setae on the inner margin, 24 joint 
very small, hidden among the long terminal spines. Colour yellowish, 
playing into reddish. L. 0 9—15 mm. 


Lake Baikal. Depth 200 m. 


12. E. fuscus (Dyb.) 1874 Gammarus f., B. Dybowsky in: Horae Soe. ent. 
Ross., v. 10 suppl. p.63 t.5 f.2 | 1899 Echinogammarus f., T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 v.7 p.429 | 1893 Gammarus flwiatilis (part.)?, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 928. 


Pleon segments 1—6 with dorsal spines in groups on slight elevations 
of the hind margin; segments 1 and 2 with 2 middle and 2 lateral groups, 
each with 4 spines; in all the segments the middle and lateral groups 
sometimes unite on either side; segments 3 and 4 have an additional cross- 
row of 2 groups, with variable number of spines. Pleon segments 1 and 2, 
but not segment 3, having the lateral lobe marked off. Eyes rather small, 
reniform (in figure widened below), black. Antenna 1 about ?/, as long as 
body, only a little longer than antenna 2, 1° joint longer than 24 and 34 
combined, as long as ultimate joint of pedunele of antenna 2 (in figure; shorter in 


‚text), lagellum 30-jointed, accessory flagellum 7-jointed. Antenna 2, flagellum 


20-jointed, with calceoli. Gnathopods 1 and 2, 6 joint moderately large, 
in gnathoped 1 piriform, in gnathopod 2 rather smaller, oblong, but with 
the palm rather oblique. Peraeopods 3—5, 24 joint rather broad, hind 
margin convex or somewhat sinuous, ending below in a short, acutely 
projeeting point. Uropods 1 and 2 reaching middle of uropod 3. Uropod 3, 
inner ramus !/,— °/, as long as outer, both with simple setae on outer margin, 
but also plumose setae on inner; 24 joint of outer ramus (in figure) distinct. 
Telson (in figure) with the lobes narrow, each having 3 spines at apex. 
Colour violet-brownish, with greenish spots; hind margin of head and front 
half of peraeon segment 1 brighter coloured; appendages banded. L. J 
reaching 39 mm. 
Lake Baikal. Depth 30—100 m. 


13. E. murinus (Dyb.) 1874 Gammarus m., B. Dybowsky in: Horae Soe. ent. 
Ross., v. 10 suppl. p.64 t.5 f.1 | 1899 Echinogammarus m., T. Stebbing in: Tr. Linn. - 
Soc. London, ser.2 ©.7 p.429 | 1893 Gammarus fluviatilis (part.)?, A: Della Valle in: 
F. Fl. Neapel, 0.20 p. 929. 


Pleon segments 1—6 with dorsal spines on low elevations of the 
hind margin; segmient 1 with 1 cross-row of 2 middle and 2 lateral groups, 
each containing 4 or 5 spines; segment 2 with 3 eross-rows, the hindmost as 
in segment 1, but here with 4 spines to a group, preceding row similar or with 
only 2 middle‘ groups, and the other row generally with only 2 middle 
groups, spines varying from 1—3 in a group; segment 3 like segment 2, 
but often with the addition of solitary spinules and simple setae; segment 4 
with 2 eross-rows, the spines more delicate, and often giving place to setae; 
segments 5 and 6 each with 1 cross-row, the lateral groups usually having 
4 spines, the median 1 or 2 pairs of setae. Pleon segments 1—3 having 
the lateral lobes distinetly marked off. Eyes rather large, reniform, widened 
below and little rounded off, black. Antenna 1 nearly °/, as long as body, 
1° joint as long as 24 and 34 combined, and as long as ultimate joint 
of peduncle of antenna 2, flagellum with 39—53 joints in Q, 57 ind, 


Echinogammarus 487 


accessory flagellum with 12 joints in oO, 10 in d. Antenna 2, ultimate 
joint of pedunele rather shorter than penultimate, flagellum 28-jointed, with 
calceoli. Gnathopods 1 and 2 as in E. fuscus. Peraeopods 3—5, 24 joint 
tolerably broad, but narrower and longer than in E. fuscus. Uropods 1 


' and 2 reaching middle of uropod 3. Uropod 3, outer ramus strong, with ° 


only simple setae on outer margin, plumose setae also on inner; inner ramus 
narrow, °/, as long as outer, with plumose setae on both margins. Telson 
elongate, (in figure: each lobe with 1 spine high up on outer margin, 1 low 
down on inner, 3 on narrow apex). Colour bright violet-brownish or dark 
grey, with bright olive-green spots, appendages banded. L. about 23 mm. 


Lake Baikal. Depth 30—100 m. 


14. E. aheneus (Dyb.) 1874 Gammarus a. + @. a. var. setosus + @. a. subvar. 
miniatus + G. a. subvar. succineus, B. Dybowsky in: Horae Soc. ent. Ross., e.10 suppl. 
p-65, 66; t.7 £.1, 2; t.6 £.3 | 1899 Echinogammarus a., T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 v.7 p.429 | 1893 Gammarus calcaratus (part.)?, A. Della Valle in: 


.F. Fl. Neapel, v.20 p. 927. 


Pleon segments 1—6 armed with spines, varying in number and arrange- 
ment; segment 1 with 1 or 2 cross-rows of spines, segment 2 with 2—4 eross-rows, 
segment 3 with 4 or 5, segment 5 with 1 or 2, segment 6 with 1 eross-row of 
spines; segment 4 not specified. Besides the spines oceur setae, which sometimes 
take the place of the spines or conceal them. Pleon segments 1—3 having 
the lateral lobes distinetly marked off; also on lower margins of side-plates 
there are usually setae, few or whole faseicles.. Eyes reniform or biseuit- 
shaped, often slightly widened below, black. Antenna 1 nearly or quite as 
long as body, 1° joint little or not longer than 24, 34 not very short, flagellum 
41—116-jointed, accessory flagellum 7—13-jointed. Antenna 2, ultimate 
joint of peduncle long, longer than penultimate, flagellum 20—33-jointed, 
with calceoli. Gmathopod 1, 6®% joint piriform, larger than the oblong 6th 
of gnathopod 2. Peraeopöds 3—5, 24 joint moderately broad, hind margin 
slightly convex or somewhat concave, ending below in a little angle. Uro- 
pod 1 not reaching middle of uropod 3. Uropod 3 long and strong, outer 
ramus 2-jointed, more than twice as long as inner, slightly curved inward, 
with only simple setae on outer margin; inner ramus with faseieles of simple 
setae interspersed with plumose ones on its margins. Telson (in figure) as in 
E. murinus. Colour red or-yellow. L. reaching about 37 mm. 


Lake Baikal. Depth 50—500 m. 


15. E. sarmatus (Dyb.) 1874 Gammarus s., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.86 t.1 f.3; t.8 f.4 | 1899 Echinogammarus s.. T. Stebbing in: 
Tr. Linn. Soc. London, ser.2 0.7 p.429 | 1893 Gammarus flwviatilis (part.), A. Della 
Valle in: F. Fl. Neapel, ®.20 p. 930. 


Q unknown. — C. Peraeon segment 7 and pleon segments 1—6 
with dorsal spines, forming a single cross-row on hind margin, formed of 
2 lateral groups with 2—5 spines in each, and 2 middle groups with 1—4 
spines in each. Eyes retort-shaped, almost pointed above, concave in front, 
the widened lower part with lower margin slightly concave, white, becoming 
rosy on exposure. Antenna 1 longer than body, 1° joint long, 24and 34 
successively a little shorter, flagellum thrice as long as pedunele, 130-or 
131-jointed, accessory flagellum 39-jointed. Antenna 2 very little shorter 
than antenna 1, ultimate joint of peduncle longer than penultimate, 
flagellum 110—115-jointed, twice as long as peduncle. All the legs long 


— 


488 Echinogammarus 


and delicate. Gnathopods 1 and 2, 6tk joint not large, piriform (in figure of 
gnathopod 2, 6! joint oblong, with a very oblique palm), the 5tk joint in 
both gnathopods rather elongate; gnathopod 2 rather smaller than gnatho- 
pod 1. Peraeopods 3—5, 24 joint slender, twice or (figure) more than twice 
as long as broad, the expansion forming a little lobe at top. Uropods 1 and 2 
with rami longer than peduncle, almost reaching as far as end of the long 
uropod 3. Uropod 3, outer ramus with 1° joint twice as long as peduncle, 
24 joint nearly '/, as long as 1°, inner ramus not much shorter: than 
1° joint of outer, both with numerous plumose setae on both margins. 
Colour white or faintly flesh-toned, on exposure becoming more rosy. I. about 
42 mm. 


Lake Baikal. Depth 1300 m. 


16. E. capreolus (Dyb.) 1874 Gammarus ec. + @. ce. var. chloris, B. Dybowsky 
in: Horae Soe. ent.Ross., v. 10 suppl. p.87 t.11f.1 | 1899 Echinogammarus capreolus, T. 
Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p.429 | 1893 Gammarus fluviatilis (part.), 
A.Della Valle in: F. Fl. Neapel, v.20 p. 928. 


Peraeon segment 7 and pleon segments 1—6 with dorsal spines; on. 


peräeon segment 7 and pleon segments 1—3 the spines are very delicate, 
oceupying the hind margin in too close a row to be separated into groups; 
on segments 4—6 they form 2 lateral groups, each with 2—5 spines, and 2 
middle groups, each with 1—3 spines. Eyes rather large, slightly reniform, 
wider below than above. Antenna 1 longer than the body, 1° joint stout, 
nearly as long as 24 and 34 combined, flagellum 9—20 times as long as 
peduncle, 64—95-jointed, accessory flagellum 5—10-jointed. Antenna 2, 
ultimate and penultimate joints of peduncle subequal, much more slender 
than 1° joint of antenna 1, flagellum 29—43-jointed, 2 or 3 times as long 


as peduncle. Legs delicate, long, brittle. Gnathopod 1, 6% joint slenderly ° 


piriform (oblong in figure); gnathopod 2, 5tl and 6tk joints longer but 
narrower than in gnathopod 1, 6!" narrowly oblong, with short transverse 
palm. Peraeopod 3 only a little shorter than peraeopod 4. Peraeopods 3—5, 
24 joint longer than broad, hind margin feebly convex, ending below in a 
short angle. Uropod 1 longer than uropod 2, reaching end of uropod 3. 
Uropod 3, outer ramus twice as long as peduncle, its 24 jomt '/, as long as 1*t, 
inner ramus nearly as long as 1° joint of outer, both with plumose setae on 
margins. Colour horn-yellow. L. 14—19 mm. — Var. chloris: eyes larger 
and broader, legs more short and sturdy, 6! joint of gnathopods 1 and 2 
stronger and broader, 24 joint of peraeopods 3—5 broader- and shorter, uro- 
pods 1—3 shorter, colour greenish, spotted with brown. L. 11—15 mm. 


Lake Baikal. Depth 100—-200 m. 


17. E. ussolzewii (Dyb.) 1874 Gammarus ussolzevii, G. ussolzewü, @. ussolzevi + 
@. ussolzewii var. abyssorum, B. Dybowsky in: Horae Soc. ent. Ross., v. 10 suppl. p. 28, 
89, 190 t.9 £.2 | 1893 Gammarus fluviatilis (part.)?, A. Della Valle in: F. Fl. Neapel, 
v.20 p. 981 | 1899 Echinogammarus uzzolzewii, T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 v.7 p.429. 

Peraeon segment 7 and pleon segments 1—6 with dorsal spines; on 
peraeon segment 7 hind margin with 2 middle, 2 lateral and 2 marginal 
groups of 3 or 4 spines each; pleon segments 1—3, spines of the groups 
more numerous, so as often to form a continuous row on the hind margin, 
preceded by another row of 4 groups, 2 lateral and 2 marginal, with 3 
or 4 spines each; segments 4—6 with 4 groups, containing each 2—4 spines. 
Eyes tolerably large, narrowly reniform, slightly widened below, black. Antenna 1 


er 


ET WERTET AR 0 EWR 


Echinogammarus 489 


about '/, longer than body, 18 joint stout, 34 not very short, flagellum about 
5 times as long as peduncele, joints reaching 200 in number, accessory 
flagellum 14—17-jointed. Antenna 2 about '/, length of antenna 1, ultimate 
joint of pedunele longer than penultimate, flagellum rather longer than 
pedunele, 20—42-jointed. Gnathopods 1 and 2 nearly equally long, gnatho- 
pod 1 with 6! jomt piriform, gnathopod 2, 6% joint narrowly oblong, with 
short transverse palm in Q, smaller than Gh joint of gnathopod 1, but in C 
widening to the oblique palm, and both broader and longer than 6th joint 
of gnathopod 1. Peraeopods 3—5, 24 joint moderately broad, hind margin 
slightly convex or sinuous, or nearly straight, ending below with a projecting 
acute angle. Uropods 1 and 2 reaching end of shorter ramus of uropod 3. 
-Uropod 3, inner ramus °/,—?/, as long as outer, plumose setae on both 
margins; outer ramus having them only on its inner margin; its 2 joint 
distinet. Colour reddish yellow. L. 34 mm. — Var. abyssorum is distinguished 
by longer extremities, slender 6! joint to gnathopods 1 and 2, longer uropod 3, 
with relatively shorter. inner ramus, colour bright rose-red or reddish yellow, 
eyes whitish (becoming dark in spirit) or reddish, and plumose setae on 
outer margin of outer ramus of uropod 3. L. 41 mm. 


Lake Baikal. Depth 150—1000 m. 


. 18. E. stenophthalmus (Dyb.) 1874 Gammarus s., B. Dybowsky in: Horae 
Soc. ent. Ross., v. 10 suppl. p. 90 | 1899 Echinogammuarus s., T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 v.7 p.429 | 1893 Gammarus fluviatilis (part.)?, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 930. 


Peraeon segment 7 and pleon segments 1—6 with dorsal spines on 
slight ridge-like elevations of the hind margin; on peraeon segment 7 only 
2 middle rows, on all the pleon segments 2 middle and 2 lateral, on segments 
2 and 3 the spines more numerous than on the others, so as to form a 
continuous row; Spines in a group 4—-6, rarely 1-3. Eyes narrowly to 
linear reniform, scarcely widened below, 4 times as deep as broad. Antenna 1 
as loug as body, thrice as long as antenna 2, 1° joint thick, almost as long as 
ultimate joint of peduncle of antenna 2, flagellum more than 4 times as long as 
peduncle, 121-jointed, accessory flagellum 8-jointed. Antenna 2, flagellum shorter 
than pedunele, 23-jointed. Gnathopod 1, 6t* joint slenderly piriform. Gnathopod 2, 
6'h joint oblong. Peraeopods 3—5, 24 joint rather broad, with convex front 
and hind margin, the latter ending below in an acute angle. Uropods 1 and 2 
 reaching about the middle of uropod 3. Uropod 3, outer ramus without 
plumose setae on outer margin, inner ?/, as long, with plumose setae on 
both margins. L. over 30 mm. 


Lake Baikal. Depth 200 m. 


. 19. E. schamanensis (Dyb.) 1874 Gammarus sz B. Dybowsky in: Horae 
Soe. ent. Ross., v. 10 suppl. p.91 | 1899 Echinogammarus s., T. Stebbing in: Tr. Linn. 
Soc. London, ser.2 v.7 p.429 | 1895 Gammarus calcaratus (part.)?, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 930. 


Peraeon segment 7 and pleon segments 1—6 with dorsal spines, in 
regular and usually separate groups in 1 eross-row on each hind margin; 
peraeon segment 7 with2 middle groups, all the rest with 2 lateral and 2 middle 
groups, the latter eoalescent on pleon segments 4—6, spines 2—6 in middle 
groups, 3—6in lateral groups. Eyes large and broad, reniform, black. Antennal 
almost as long as body, peduncle thicker and only a little shorter than that 
of antenna 2, 3@ joint relatively longer than in nearly related species, flagellum 


490 Echinogammarus 


twice as long as peduncle, 75—84-jointed, accessory flagellum 7- or 8-jointed. 
Antenna 2 about °/, as long as antenna 1, flagellum shorter than peduncle, 
26—35-jointed. Gnathopod 1, 6% joint broad, piriform, gnathopod 2, 6*h joint 
oblong. Peraeopods 3—5, 24 joint about */, longer than broad, hind margin 
sinuous, acute lower eorner not prolonged into a tooth. Uropods 1 and 2 reaching 
about ?/, of uropod 3. Uropod 3, outer ramus without plumose setae on outer 
margin, inner ramus ?/, as long as outer. Colourreddish yellow. L. about 23 mm. 


Lake Baikal. Depth 200 m. 


20. E.leptocerus (Dyb.) 1874 Gammarus I. + @.l.var. nematöcerus, B.Dybowsky 
in: Horae Soc. ent. Ross., v.10 suppl. p.85 t.8f.2; p.85 t.8 f.3 | 1899 Echinogammarus |, 
T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.429 | 1898 Gammarus fluviatilis 
«(part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 929. 


Pleon segments 1-——3 with about 18 dorsal spines in 3 or 4 little 
groups or in a continuous row on hind margin of each; segments 4—6 with 
7—9 spines in 3 groups. Eyes large and broad, irregularly reniform, hind 
margin uneven and lobed, black. Antenna 1 a little longer than body, nearly 
thrice as long as antenna 2, 1° joint stout, as long as 24 and 34 combined, 


flagellum about 6 times as long as pedunele, 43 — 90-jointed, accessory flagellum 


4—7-jointed. Antenpa 2, ultimate joint of peduncle slender, longer than 
penultimate, flagellum a little shorter than pedunele, 11— 18-jointed. Gnathopods 
1 and 2, 6% joint rather large, in gnathopod 1 piriform, in gnathopod 2 
oblong, in C widening to the palm. Peraeopods 3—5, 24 joint slender, 
lower hind angle unimportant. Uropod 1 reaching middle of uropod 3. 
Uropod 3, inner ramus only a little shorter than outer, both with plumose 
setae on their margins. Colour reddish yellow. L. 14—15 mm. -— Var. nematocerus 
is distinguished by more slender build of body, longer and more slender 
legs, flagellum of antenna 2 longer than peduncle, eyes more narrowed above, 
more numerous setae on uropod 3, and whitish colour. L. 22—23 mm. 


-Lake Baikal. Depth 150—670 m. 


21. E.toxophthalmus (Dyb.) 1874 Gammarus t., B. Dybowsky in: Horae 
Soe. ent. Ross.. v. 10 suppl. p. 77 | 1899 Echinogammarus t., T. Stebbing in: Tr. Linn. 
Soc. London, ser.2 v.7 p.429 | 1893 Gammarus fluviatilis (part.)?, A. Della Valle in: 
F. Fl. Neapel, 0.20 p. 931. 


Pleon segments 1—6 with dorsal spines in a single cross-row of 
regular groups on low elevations of each segment’s hind margin, 1—3 spines 
in each of the 2 middle groups, 4—8 in the 2 lateral groups, except on 
segment 6 where the number is reduced to 2. Eyes long, reniform, much 
curved, widened below, not widely separated above, black. Antenna 1 about 
?/), as long as body, little longer than antenna 2; 1° joint stout, considerably 
shorter than ultimate joint of peduncle of antenna 2, flagellum about 2"), 
times as long as peduncle, 45-jointed, accessory flagellum 5-jointed. 
Antenna 2, flagellum a little shorter than pedunele, 26-jointed. Gnatho- 
pods 1 and 2, 6t% joint slender, in gnathopod 1 piriform, in gnathopod 2 
oblong. Peraeopods 3—5, 24 joint moderately broad, hind margin almost 
straight, ending below in a shortly projecting angle. Uropod 1 reaching 
nearly the end of uropod 3. Uropod 3, inner ramus about '/, shorter than 
outer, both with plumose setae on both margins. Colour clear violet. 
L. 20 mm. 


Lake Baikal. Depth 120 m. 


Eehinogammarus 491 


22. E. vittatus (Dyb.) 1874 Gammarus v., B. Dybowsky in: Horae Soc. ent. 
Ross., v.10 suppl. p. 82 | 1899 Echinogammarus v., T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 v.7 p.429 | 1898 Gammarus fluviatilis (part.)?, A. Della Valle in: F. Fl. Neapel, 
v.20 p. 931. 

Pleon segment 1 with dorsal spines in a single eross-row formed by 2 quite 
small lateral groups and 2 middle spines, which seem to stand immediately 


- ‚on the dorsal surface; segment 2 with 3 cross-rows, the front one composed of 


2 middle groups, the next and the one on the hind margin of 2 middle 
and 2 lateral groups, each containing 4 or 5 spines; segment 3 like segment 2, 


but with addition in front of 2 little groups on the median line; segment 4 


with 2 cross-rows, the front one composed of 2 middle groups, the hinder of 2 
middle and 2 lateral groups, having 2—5 spines in each; segments 5 and 
6 each with 1 cross-row formed by 2 middle and 2 lateral groups. Eyes 
moderately large, reniform, black. Antenna 1 not '/, as long as body, 
2/,—"/, longer than antenna 2, flagellum not twice as long as peduncle, 
33—39-jointed, accessory flagellum 5- or 6-jointed. Antenna 2, flagellum shorter 
than peduncle, 12—15-jointed.. Gmathopod .1, 6% joint slenderly piriform, 
somewhat larger than oblong 6% joint of gnathopod 2. Peraeopods 3—5,"24 joint 
moderately broad, hind margin prolonged below in an obtuse angle, the margin 
convex in peraeopod 3, a little sinuous in peraeopods 4 and 5. Uropod 1 
reaching end of shorter ramüs of uropod 3. Uropod 3 moderately long, 


inner ramus ?/,—?/, as long as outer, both fringed with numerous faseicles 


of setae, and both having among the simple setae of the fascicles on the inner 
margin plumose setae. Colour bright yellow green, or bright olive-green, 
each segment with a narrow stripe of brown on hind margin, antennae 
brown, with narrow greenish bands. L. 23 mm. 


Lake Baikal. Under stones. 


23. E. petersii (Dyb.) 1874 Gammarus p., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.83 t.10 f.1] 1899 Echinogammarus p., T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 0.7 p.429 | 1893 Gammarus calcaratus (part.)?, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 930. 


Peraeon segment 7 very rarely having a couple of delicate spinules 
on the hind margin; pleon segments 1—6 each with 1 cross-row of dorsal 
spines, on segments 1—3 forming 6 groups, 2 middle, 2 ‚lateral and 2 
marginal, on segments 4—6 only 4 groups, 3—5 spines in a group; exceptionally 
some delicate isolated dorsal spinules occur on segments 2 and 3. Head 
with slightly convex upper outline. Eyes moderately large, reniform,' a little 
widened below and narrowed above, white, difficult to make out in spirit, 
not darkening with exposure to light. Antenna 1 thrice as long as body, 
5 times as long as antenna 2, extremely brittle, 1° jomt stout, longer than 
24 and 34 combined, shorter than ultimate joint of peduncle of antenna 2, 
flagellum never found complete, 17 times as long” as pedunele, at least 
350-jointed, accessory flagellum fully as long as peduncle, 16-jointed. 
Antenna 2, ultimate joint of peduncle slender, much longer than penultimate, 
flagellum longer than pedunele, 27—-57-jointed. Legs delicate. Gnathopod 1, 
6'% joint piriform. Gnathopod 2, 6! joint oblong. In figures gnathopod 1 
in © has the 6th joint shorter, broader and with longer hind margin than 
in S, and gnathopod 2 in C' has the 6'k widening to the palm much more 
than in O, and consequently with a longer palm and longer finger. Peraeopods 
3—4 (5?), 24 joint moderately broad, hind margin little convex, ending 
below with a weakly projeeting angle; 24 joint of peraeopod 5 (in figure) 
narrow, its breadth greatest at top, equalling only '/, of its length, the 


492 Eehinogammarus 


hind margin almost straight, ending below in a little obtuse point. Uropods 
1 and 2 reaching end of shorter ramus of uropod 3. Uropod 3 long, inner 
ramus about ?/, as long as outer, of which the 24 joint is well developed, 
1, as long as 1° joint; both rami with plumose setae on both margins. 
Colour delicate, clear violet or reddish white. L. about 29 mm. 

Lake Baikal. Depth 700 --1300 m. 


24. E. violaceus (Dyb.) 1874-Gammarus v. + @.v. var. virescens, B. Dybowsky 


in: Horae Soe. ent. Ross., v.10 suppl. p.75 t. 10 f.3; p.76 t.12 f.5 | 1899 Echinogammarus 
violaceus, T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.429 | 1893 Gammarus 
calcaratus (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 931. 

Pleon segments 1—6 each with 1 eross-row of dorsal spines on the 
hind margin pectinately set on ridge-like elevations in 2 middle groups 
with 3—5 spines each, and 2 lateral groups with 4—7 spines each. Head, 
rostral point short and rounded. Eyes small, reniform, slightly widened 
below, black. Antenna 1 in J as long as body, more than twice as long as 
antenna 2, 1° joint not greatly longer than 24,'nor 24 than 34, flagellum about 
4 times.as long as pedunele, 9L—148-jointed, accessory flagellum 7- or 8-jointed. 
Antenna 2, ultimate joint of peduncle longer than penultimate, flagellum 
shorter than peduncle, 18—-25-jointed. Gnathopod 1, 6% joint broad, piriform. 


Gnathopod 2, 6tk joint slender, oblong. In figure gnathopod 1 has StR joint 


as broad as long, 6! joint twice as long as 5t", broadly oblong oval; gnatho- 
pod 2 has 5tk joint long and narrow, not much shorter than the 6!", the 2 combined 
being much longer than the much broader 5t" and 6!" of gnathopod 1 combined. 
Peraeopods 3—5, 24 joint broad, in peraeopod 5 heart-shaped, about '/, 
longer than broad, hind margin convex, prolonged below into a short angle. 
Uropods 1 and 2 short, reaching almost ”/, length of uropod 3. Uropod 3, 
inner ramus about °/,—'/, shorter than outer, with plumose setae on both 
margins, while the outer ramus has them only on the inner. Colour dark 
violet-red or brownish red, appendages brightly banded. L. reaching 37 mm. — 
Var. virescens distinguished by smaller eyes, shorter uropod 3, broader 24 joint 
to peraeopods 3—5 and a smaller number of spines. 
Lake Baikal. Depth 20-—-100 m. 


25. E. ibex (Dyb.) 1874 Gammarus i., B. Dybowsky in: Horae Soe. ent. Ross., 
v.10 suppl. p.78 | 1899 Echinogammarus i., T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 v.7 p.429 | 1893 Gammarus fluviatilis (part.)?, A. Della Valle in: F. Fl. Neapel, 
v.20 p. 929. 

Pleon segments 1—6 each with 4 groups of dorsal spines on very 
slight elevations of the hind margin, the 2 middle groups with 1—3 spines 
each, the lateral groups with 4—8. Head, frontal line almost straight. Eyes 
large, broad, reniform, slightly widened below, not far apart above, black. 
Antenna 1 longer than body, twice as long as antenna 2, 1°t joint stout, shorter 
than ultimate joint of pedunele of antenna 2, flagellum 5 times as long as peduncle, 
73—80-jointed, accessory flagellum 8-jointed. Antenna 2, flagellum shorter than 
peduncle, 24—30-jointed. Gnathopods 1 and 2, 6'k joint moderately large, in C 
slightly widening to the palm, in gnathopod 1 piriform, in gnathopod 2 oblong. 
Legs delicate and thin. Peraeopods 3—5, 24 joint not broad, front margin 
carrying long setae, the feebly convex hind margin 10—16 short setae, and 
ending in a short projeeting angle. Uropods 1 and 2 long, but scarcely 
reaching middle of uropod 3. Uropod 3 in G almost !/, as long as body, 
outer ramus about "/, longer than inner, both having plumose setae on both 
margins. Colour uniform yellow, or with horn-yellow markings. L. 14 mm. 

Lake Baikal. Depth 150—200 m. 


a ee Ey a a NE ara SEE BR 


Echinogammarus 493 


26. E. parvexii (Dyb.) 1874 Gammarus p., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.81 t. 10 f.2 | 1899 Echinogammarus p., T. Stebbing in: Tr. Linn. 
Soe. London, ser. 2 v.7 p.429 | 1898 Gammarus ealcaratus (part.)?,.A. Della Valle in: 
F. Fl. Neapel, v.20 p. 929. 

Pleon segments 1—6 each with 4 groups of dorsal spines on elevations 
‚of the hind margin, the middle groups each with 1 or 2 spines, the lateral 
each with 2—4. Eyes tolerably large, biscuit-shaped or reniform, wide apart 
above, black. Antenna 1 nearly twice as long as body,thrice as long as antenna 2, 
1° joint not as long as 24 and 3% combined, flagellum 7—9 times as long as the 
thin peduncle, 310-jointed, accessory flagellum 17-jointed. Antenna 2, ultimate 
joint of pedunele longer than penultimate, flagellum shorter than peduncle, 
26-jointed. Gnathopod 1, 5tk joint as broad as long, 6!% very broadly piriform, 
the basal half tumid, finger strongly curved. Gnathopod 2, 6!" joint long 


and narrow, palm short, almost transverse. Peraeopods 3—5, PX joint narrow, 


in figure of peraeopod 5 more than twice as long as broad, hind margin 
flatly concave, produced to a subacute point. Uropods 1 and 2 long, reaching 
nearly the middle of uropod 3, rami longer than pedunele. Uropod 3, outer, 
ramus without plumose setae on outer margin, 24 joint between ’/, and '/, 
as long as 1°, inner ramus ?/, as long as 1° joint of outer. Colour orange- 
yellow. L. about 25 mm. 

Lake Baikal. Depth 170 m. 


27. E. polyarthrus (Dyb.) 1874 Gammarus longicornis (non J. C. Fabricius 
1779!) + @. I. var. p., B. Dybowsky in: Horae Soe. ent. Ross., v. 10 suppl. p.79; p. 80 
t.10 f.2b‘, e‘ | 1899 Echinogammarus p., T. anne in: Tr. Linn. Soc. London, ser. 2 
v.7 p.429 | 1893 Gammarus ealcaratus (part.)?, A. Della Valle in: F. Fl. Neapel, 
v.20 p. 929. 

Pleon segments 1—6 each with 4 groups of dorsal spines on ridge- 
like elevations of the hind margin, the 2 middle groups each with 2—4 spines, 
the lateral with 2—6, except on segment 6, where there are only 4 spines 
for the 4 groups; also on segments 4 and 5 the middle groups are weakly 
developed. Eyeslarge, little deeperthan broad, reniform, slightly widened below, 
narrowedabove, black orreddish. Antennal in S longer than the body, 3—4times 
aslong as antenna 2, flagellum 5—8 timesas longas the stout peduncle, 250-— 340- 
jointed, accessory flagellum 16-jointed. Antenna 2, ultimate joint of peduncle 
longer than 1% joint of antenna 1, flagellum shorter than peduncle, 25—29- 
jointed. Gnathopod 1, 6% joint piriform base not tumid. Gnathopod 2, 6'% joint 
oblong. Peraeopods 3—5, 24 joint not very broad, hind margin flatly concave, 
ending in a short, projecting point. Uropods 1 and 2 reaching middle of 
uropod 3. Uropod 3, inner ramus about ?/, length of outer, both with plumose 
setae on both margins. “Colour brighter or darker reddish yellow. L. 32 mm. 


Lake Baikal. Depth 170—700 m; the so-called variety, from 300—700 m. 


E. mutilus (Abildg.) 1789 Gammarus m., Abildgaard in: O. F. Müller, Zool. 
Dan., ed.3 v.3 p.60 t.116 f.1—11 | 1888 @. m., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.56 | 1798 Cancer (Gammarellus) m., J. F. W. Herbst, Naturg. Krabben Krebse, 
v.2 p.120 1.35 f.7 | 1893 Gammarus locusta (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 pP. 759. 

Peraeon segment 7 and pleon segments 1—3 furnished dorsally with backward 
directed spines on hind margin.. Antennae 1 and 2 subequal, flagellum long in both. 
Accessory flagellum of antenna 1 very long, 24-jointed. Pedunele of antenna 2 reaching 
beyond that of antenna 1. Uropod 3, peduncle short, rami rather long, nearly equal, 
fringed with long setae. 


North-Atlantie (Farö Isles).. On the shore. 


a ae a ae Se ne 


494 Heterogammarus 


47. Gen. Heterogammarus Stebb. 

1899 Heterogammarus, T. Stebbing in: Tr. Linn. Soc. London, ser.2 0,7 p. 429. 

In general like Gammarus (p. 460), without dorsal teeth or carinae, or 
notable processes of head or side-plate 1, with accessory flagellum of antenna 1 
more than l-jointed, uropod 3, outer ramus with 2 joints, and telson cleft; 
but separated from Gammarus by one or more of the following characters: 
peduncle of antenna 1 longer than peduncle of antenna 2, 6®% joint of gnatho- 
pod 1 larger than 6tk joint of gnathopod 2, uropod 1 very short. 


8 species. 


Synopsis of species: 


1 Uropod 3 long, '„—!/ı as long as body — 2. 
Uropod 3 not long, !/ır—"!/ıo as long as body — 5. 

2 Antenna 1 shorter than antenna 2... ..... 1. H. stanislavii. . p.494 
Antenna 1 longer than antenna 2 — 3, & 

3 Peraeopod 5, 2d joint with well developed wing . 2. H. sophianosii . p.494 
Peraeopod5, 2d joint with wingscarcely developed —4. 

4 Uropod 3, inner ramus about ®/s as long as outer 3. H. capellus. . . p.495 
Uropod 3, inner ramus scarcely !/ı as long as outer 4. H.ignotus . . . p.495 
Gnathopod 1, 6th joint larger than that of Ä 

5 | gnathopod 2 — 6. 

| Gnathopod 1, 6th joint subequal to that of 
gnathopod 2 — 7. 

6 Peraeopods 3 and 4, 2d joint broad. . . .... bh: BE Berl. 2.5: 2498 
Peraeopods 3 and 4, 24 joint narrow . ..... 6. H. albulus . . . p.496 

- Antenna 1 half as long as body . . ...... 7. H. bifasciatus . p.496 
Antenna 1 4a as long as body...» 2.2.2. 8. H. branchialis . p. 497 


1. H. stanislavii (Dyb.) 1874 Gammarus s., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.58 | 1899 Heterogammarus s., T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 v.7 p.429 | 1893 Gammarus stanislavi, @. pungens (part.)?, A. Della Valle in: 
F, Fl. Neapel, v.20 p. 930. 


Juv. Only pleon segments 4—6 carrying spines, these situated on 3 
slight elevations of the hind margin, the median with 2 or 3, the lateral each with 
l or 2 spines. Head, rostrum obsolete. Side-plates small and low. Pleon 
segments 2 and 3, postero-lateral corners acute. Eyes broadly reniform, 
slightly widened below, black. Antenna 1 only about ®/, as long as antenna 2, 
peduncle shorter and thinner than peduncle of antenna 2, flagellum 25-jointed, 
accessory flagellum 5- or 6-jointed. Antenna 2 about half as long as body, 
flagellum 53-jointed. Gmathopod 1, 6" joint piriform, widened at base, larger 
than 6% joint of gnathopod 2, which is also piriform, but not specially widened at 
base. Peraeopods 3—5, 24 joint rather slender, somewhat expanded proximally. 
Uropod 1 reaching beyond uropod 2, to the end of inner ramus of uropod 3. 
Uropod 3 long, '/, as long as body, outer ramus 4 or 5 times as long as 
inner, with plumose setae only on inner margin, inner ramus having them 
on both margins. Colour bright reddish yellow. L. 18—20 mm. 


Lake Baikal. Depth 100 m. 


2. H. sophianosii (Dyb.) 1874 Gammarus s. + @.s. var. scirtes, B. Dybowsky 
in: Horae Soe. ent. Ross., v.10 suppl. p. 101 t.10 £.4; p.102 t.11 f.2 | 1899 Hetero- 
gammarus sophianosi, T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p.429 | 1893 
Gammarus flwviatilis (part.)?, A. Della Valle in: F. Fi. Neapel, v.20 p. 980. 


Heterogammarus 495 


Pleon segments 4—6 with few, delicate spines on hind margin, other 
segments without dorsal armature. Head, rostrum obsolete. Eyes not large, 
little prominent, reniform, black. Antenna 1 half as long as body, twice 
as long as antenna 2, pedunele not thicker and very little longer than 
peduncle of antenna 2, flagellum 46—50-jointed, accessory flagellum 7- or 
8-jointed. Antenna 2, flagellum not longer than ultimate joint of peduncle, 
10- or 11-jointed. Gnathopods 1 and 2 in J, 6%" joint piriform, in © that 
of gnathopod 1 piriform, that of gnathopod 2 oblong, apparently the difference 
of size being slight, and the palm in all cases very oblique. Peraeopods 3—5, 
24 joint heart-shaped, hind margin of wing carrying a few short setae, and 
. ending below without forming a free corner. Uropods 1 and 2 reaching 
almost the middle of uropod 3. Uropod 3 '„—!/, as long as body, inner 
ramus nearly as long as outer, both fringed with numerous plumose setae. 
Colour olive-green or brownish, with delicate brown or dark red markings. 
L. 41—46 mm. — Var. scirtes is distinguished especially by the liveliness of 
its walking and hopping. L. 12:5 mm. 

Lake Baikal. Depth 1—50 m; on sandy coasts. 


3. H. capellus (Dyb.) 1874 Gammarus c., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.100 | 1899 Heterogammarus c., T. Stebbing in: Tr. Linn. Soc. 
London, ser.2 v.7 p.429 | 1893 Gammarus flwviatilis (part.)?, A. Della Valle in: F. Fl. 
Neapel, v.20 p. 928. ; 

Pleon segments 4—6 usually with 3 little groups of spines on the 
hind margin, 1 or 2 spines in each group, other segments without dorsal armature. 
Head, rostrum a feeble point. Eyes slightly prominent, reniform, black. 
Antenna 1 rather longer than the body, 4 times as long as antenna 2, 
peduncle stouter and longer than peduncle of antenna 2, flagellum 46—52- 
Jointed, accessory flagellum 4-jointed. Antenna 2, flagellum 8- or 9-jointed. 
Gnathopod 1, 6! joint slenderly piriform, equal to the oblong 6 joint of 
gnathopod 2. Peraeopods 3—5, 24 joint narrow, heart-shaped. Uropod 1 
reaching middle of uropod 3, uropod 2 scarcely reaching end of peduncle 
of uropod 3. Uropod 3 about '/, as long as body, inner ramus about ?/, 
' a8 long as outer, both fringed with plumose setae. Colour reddish yellow with 
scattered reddish brown spots. L. about 13 mm. 

Lake Baikal. Depth 100 m. 


4. H.ignotus (Dyb.) 1874 Gammarus i., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p. 109 t.4 f.3 | 1899 Heterogammarus i., T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 0.7 p.429 | 1893 Gammarus pungens (part.)?, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 929. 

Surface of body dorsally hairy or carrying scattered, short setae; only 
on hind margin of.pleon segments 4—6 there are somewhat longer and 
stouter setae. Eyes punctiform, white, in spirit not visible. Antenna 1 
longer than half the body, fully twice as long as antenna 2, pedunele longer 
than peduncle of antenna 2, flagellum 24-jointed, accessory flagellum 3-jointed. 
Antenna 2, ultimate and penultimate joints of peduncle subequal, flagellum 
9- or 10-jointed. Gmnathopod 1, 6% joint piriform, broader but shorter than the 
narrowly oblong 6% joint of gnathopod 2; 5tk joint also shorter in gnathopod 1. 
Peraeopods 3—5, 24 joint narrow, the wing in no part broad, distally almost 
evanescent. Uropod 1 reaching nearly middle of uropod 3. Uropod 3 '/, 
as long as body, outer ramus with 24 joint well developed, inner about !/, 
as long as outer, both with isolated simple setae, but without plumose setae. 
Colour white. L. about 10 mm. 

Lake Baikal. Depth 800 m. 


496 Heterogammarus 


5. H. flori (Dyb.) 1874 Gammarus f., @. floriü, B. Dybowsky in: Horae Soe. 
ent. Ross., v.10 suppl. p.20,52; 54, 188 | 1899 Heterogammarus flori, T. Stebbing in: Tr. 
Linn. Soc. London, ser.2 v.7 p.429 | 1893 Gammarus flwviatilis (part.)?. A. Della Valle 
in: F. Fl. Neapel, v.20 p. 928. 


Pleon segments 3 and 4 with dorsal fascieles of long setae, segments 5 
and 6 each with 4 or 5 groups of spines, usually 5 spines in each of the 
oblique lateral groups. Eyes white, in general roundish, small, in spirit not 
visible. Antenna 1 */, as long as body, less than twice as long as antenna 2, 
peduncle subequal to that of antenna 2, its 1° joint with only a couple 
of short setae on front end, flagellum 22—27-jointed, accessory flagellum 
3-jointed. Antenna 2, flagellum 7- or 8-jointed. Side-plates low, with 
1 or 2 marginal setae. Gnathopod 1, 6% joint broadly oblong, larger than 
the narrowly oblong 6! joint of gnathopod 2. Peraeopods 3 and 4, 24 joint 
about */, longer than broad, hind margin slightly sinuous, with short setae 
in peraeopod 3, long, separate setae in peraeopod 4. Peraeopod 5, 24 joint 
widened below and produced far downward in a rounded lobe, hind margin 
with close set setae. Uropods 1 and 2 not reaching end of short uropod 3. 
Uropod 3 '/,, as long as body, inner ramus about °/, as long as outer, 
with simple setae on inner margin, outer ramus with them on both margins, 
each ramus with 4 or 5 apical setae, neither with plumose setae. Colour 
white. L. nearly 16 mm. 


Lake Baikal. Depth 50-100 m. 


6. H. albulus (Dyb.) 1874 Gammarus flori var. albula, B. Dybowsky in: Horae 
Soe. ent. Ross., v.10 suppl. p.53 |'1899 Heterogammarus albulus, T. Stebbing in: Tr. 
Linn. Soe. London, ser. 2 v.7 p. 429. 


Peraeon segments and pleon segments 1—3 each with 3 groups of 
spines, 2 spines in the centre group, 3 in each of the oblique lateral groups. 
Side-plates far lower, pleon segments 4—6 shorter, legs with broader joints 
than in H. flori; eyes as in that species. Antenna 1 longer than half the 
body, less than twice as long as antenna 2, peduncle stouter and rather 
shorter than peduncle of antenna 2, its 1° joint with several strong spines on 
front end, flagellum 16—24-jointed, accessory flagellum 3- or 4-jointed, shorter 
than in H. flori. Antenna 2, flagellum 6—8-jointed. Gnathopods 1 and 2, 
6th joint oblong, in gnathopod 1 larger than in gnathopod 2, and considerably 
larger than in gnathopod 1 of H.flori, with 5 or 6 long spines along the 
palm and 3 still longer on the hind margin. Peraeopod 3, 24 joint twice 
as long as broad, hind margin feebly convex, without setae. Peraeopod 4, 
24 joint 2'/, as long as broad, hind and front margin close set with long 
setae. Peraeopod 5, 24 joint much narrower above than below, produced 
far downward in a rounded lobe. Uropods 1 and 2 short, but reaching 


beyond uropod 3. Uropod 3 "/,, as long as body, inner ramus about °”/, 


as long as outer, carrying simple setae only at apex, outer having such 
also on its outer margin. Colour white. L. © 8 mm, d 13 mm. 


Lake Baikal. Depth 300 m. 


7. H. bifaseiatus (Dyb.) 1874 Gammarus b., B. Dybowsky in: Horae Soc. 
ent. Ross., v. 10 suppl. p. 102 t.12 f.6 | 1899 Heterogammarus b., T. Stebbing in: Tr. 
Linn. Soc London, ser.2 v.7 p.429 | 1893 Gammarus fluviatilis (part.)?, A. Della Valle 
in: F. Fl. Neapel, v.20 p. 927. 


Pleon segments 4—6 each with 2 groups of spinules. Head, rostrum 
represented by a projecting curve. Eyes not very large, slightly prominent, 
reniform, ash-grey. Antenna 1 half as long as body, 2 or 3 times as long 


Heterogammarus, Parapallasea 497 


‚as antenna 2, peduncle stouter and a little longer than pedunele of antenna 2, 
flagellum 24—29-jointed, accessory flagellum 3-jointed. Antenna 2, ultimate 
joint of peduncle shorter than penultimate, flagellum 5- or 6-jointed. Gnatho- 
pods 1 and 2 in J, 6% joint piriform. Gnathopod 1 in Q, 6! joint piriform; 
gnathopod 2, 6tk joint oblong. Peraeopods 3—5, 24 joint lea broad, 
in peraeopod 5 scarcely '/, longer than broad, the wing below forming a free, 
‚often lobe-like corner. Uropod 1 reaching end of uropod 3. Uropod 3 
about !/,, as long as body, outer ramus with 2 spines and 2 simple setae 
on outer margin, plumose setae on inner; inner ramus very little shorter, with 
plumose setae on both margins. Colour dark brown, with eross-bands of 
brighter spots on head and mid-peraeon. L. about 12 mm. 


Lake Baikal. .Depth "/Ja—2 m, under stones. 


8. H. branchialis (Dyb.) 1874 Gammarus b., B. Dybowsky in: Horae Soe. 
ent. Ross., v. 10 suppl. p. 110 t.14 f.4 | 1899 Heterogammarus b., T. Stebbing in: Tr. 
Linn. Soc. London, ser.2 v.7 p.429 | 1893 Gammarus flwviatilis (part.)?, A. Della Valle 
in: F. Fl. Neapel,.v.20 p. 927.. 


Pleon segments 1—3 with a few fine dorsal setae, segments 4—6 each 
with 2 regular groups of 2 or 3 spines. Head, rostrum a short rounded 
point. Side-plates 1-—-4 setiferous. Eyes rather large, oval, narrowed below, 
black. Antenna 1 about '/, as long as body, more than twice as long as 
antenna 2, pedunele stouter but little longer than peduncle of antenna 2, 
flagellum 15—17-jointed, accessory flagellum 2-jointed. Antenna 2, ultimate 
joint of pedunele shorter than penultimate, flagellum 4- or 5-jointed. Gmatho- 
pods 1 and 2, 6! joint nearly equal, piriform. Peraeopods 3—5, 24 joint 
tolerably broad, alike in the 3 pairs, hind margin more convex than front, with 

. widely separated setae, but these often in d wanting on peraeopod 5. Uropods.l 
and 2 nearly reaching end of uropod 3. Uropod 3 !/,,— "> as long as 
body, outer ramus with 3—5 fascieles of simple setae on outer margin, 
3 pairs of setae on inner; inner ramus about half as long as outer, with 
3 pairs of long setae on inner margin. Colour changing with that of the 
host. L. 9—14 mm. 


Lake Baikal. Only taken in marsupium of larger Gammarids, or among the 
branchiae of the males. 


48. Gen. Parapallasea Stebb. 
1899 Parapallasea, T. Stebbing in: Tr. Linn. Soc. London, ser. 2 v.7 p. 429. 


Median carina not represented on peraeon or on pleon segments 1—3. 
Side-plate 4 broader, but not less deep than the preceding, emarginate behind. 
Antenna 1, flagellum longer than peduncle, accessory flagellum elongate. 
Peraeopods 3—5 with 24 joint little expanded. Telson deeply cleft. Other 
characters agreeing with Pallasea (p. 374). 


3 species. 
Synopsis of species: 


1 Median carina present on pleon segments 4—6. . . 1. P. borowskii . p. 498 
Median carina wanting — 2. 


9 | Lateral carinae chiefly composed of tooth-like processes 2. P. lagowskii . p. 498 
Lateral carinae chiefly composed of wing-like processes 3. P. puzyllii . . p.498 


Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 32 


498 Parapallasea 


1. P. borowskii (Dyb.) 1874 Gammarus b. + @. b. var. dichrous + @. b. subvar. 
abyssalis, B. Dybowsky in: Horae Soe. ent. Ross., v.10 suppl. p.139 t.2 f.3 | 1893 
Ceradocus? b., A. Della Valle in: F. Fl. Neapel, «.20 p.927 | 1899 Parapallasea b., T. 
Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p. 429. 


Peraeon and pleon segments with weak marginal swellings, peraeon 
segments 5—7 and pleon segments 1—6 each with a pair of lateral teeth 
on hind margin, as a rule pointing backward and outward, not unfrequently’ 
the first 2 pairs bent uncinately outward or forward; the teeth short, only 
on pleon segments 1—3 somewhat longer, on pleon segments 4—6 hump- 
like, each with 3 spinules, and between these humps is a median flat carina 
with 1 or 2 spinules on the hinder end. Head smooth, upper profile convex, 
rostrum short. Eyes slightly protuberant, reniform, black. Antenna 1 
more than half as long as body, twice as long as antenna 2, 1° joint long, 
but not as long as 24 and 34 combined, flagellum 52—71-jointed, accessory 
flagellum 10- or 11-jointed. Antenna 2, flagellum 17—20-jointed. Gmnatho- 
pod 1, 6% joint piriform. Gmathopod 2, 6 joint oblong, with convex hind 
margin. Peraeopods 3—5, 24 joint narrowly heart-shaped, in peraeopod 5 
twice as long as broad. Uropod 3, outer ramus about '/, longer than inner, 
both with long stout setae on the margins. Telson broader than long, divided 
to the base, apices of the conical lobes wide apart, tipped with spinules. Colour 
bright flesh-red or orange-red, differing in the varieties. L. reaching 56 mm. 


Lake Baikal. Depth 50 to below 1000 m. 


2. P.lagowskii (Dyb.) 1874 Gammarus l., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.140 t.2 £.2 |; 1893 Ceradocus? l., A. Della Valle in: F. Fl. Neapel, 
v.20 p.929 | 1899 Parapallasea 1., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 v.7 p.429. 


Body laterally compressed, peraeon and pleon segments with marginal 
swellings, which are much more weakly developed on the pleon, lateral processes 
thick, on peraeon segments I—5 as outgrowths with their ends directed 
outward and forward, on peraeon segments 6 and 7 and pleon segments 1—3 
as thick, pointed, backward directed teeth, on pleon segments 4—6 as 
strong humps, each with 4 or 5 spinules. Head feebly convex, rostrum 
almost flat. Side-plates 1—4 rather deep. Eyes extremely small, almost 
point-like, white. Antenna 1 more than half as long as body, twice as long 
as antenna 2, 1% joint long, flagellum 63-jointed, accessory flagellum 10-jointed. 
Antenna 2, flagellum 22-jointed. Gnathopod 1, 6% joint piriform. Gmnathopod 2, 
6! joint oblong, with thickened hind margin. Peraeopods 3—5, 24 joint 
heart-shaped, in peraeopod 5 nearly thrice as long as broad. Uropod 3, 
outer ramus about "/, longer than inner. Telson cleft to the base. Colour 
white or bright flesh-red, often with darker spots. L. reaching 64 mm. 


Lake Baikal. Depth 800-1300 m. 


3. P. puzyllii (Dyb.) 1874 Gammarus p., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.141 t.3 f.4 | 1893 Ceradocus? p., A. Della Valle in: F. Fl. Neapel, 
v.20 p.980 | 1899 Parapallasea p., T. Stebbing in: Tr. Linn. Soc. London, ser.2 0.7 p.429. 


Peraeon segments 1—6 and pleon segments 1—3 each divided into 
a dorsal compartment, with concave hind margin, and 2 lateral compartments 
at right angles to the dorsal, the separation effected by a pair of low, 
wing-like, outward directed, lateral carinae; on pleon segments 4—6 the 
lateral carinae are tubercular, surmounted by 4 or 5 spinules. Head with 
the convex upper Surface separated from the sides by obscure lateral carinae, 
the rostral point small, depressed. Side-plates 1—4 moderately deep. Eyes 


Parapallasea, Amathillina 499 


small, roundish, very prominent, advanced in front of rostrum between 
antennae 1 and 2, black. Antenna 1 nearly half as long as body, almost 
twice as long as antenna 2, 1% joint elongate, subequal to 24 and 34 combined, 
flagellum 40—47-jointed, accessory flagellum 5—7-jointed. Antenna 2, 
flagellum 14—16-jointed. Gnathopod 1, 6 joint piriform. Gnathopod 2, 
6th joint oblong. Peraeopods 3—5, 24 joint elongate, heart-shaped, with rather 
long remote setae on hind margin. Uropod 3, outer ramus about °/, longer 
than inner. Telson cleft to the base. Colour red. L. reaching 53 mm. 


Lake Baikal. Depth 50—500 m. 


49. Gen. Amathillina 0. Sars 


1894 Amathillina (Sp. typ.: A. eristata) (Amathillinella ©. Grimm in MS.), 6. 0. 
Sars in: Bull. Ace. St.-Pötersb., ser.5 v.1 p.201. 


Body more or less carinate, pleon segments 5 and 6 with subdorsal 
spinules. Head, rostrum short, lateral lobes short, obtuse, post-antennal 
corners acute or rectangular. Side-plates 1—-4 of moderate size, 4 much 
the largest, distinetly emarginate. Pleon segments 2 and 3, postero-lateral 
corners quadrate. Antenna 1 the longer, 34 joint not very short, accessory 
flagellum 2—6-jointed. Mouth-parts normal. Gnathopods 1 and 2 subequal. 
 Peraeopod 4 the longest, its 24 joint moderately expanded, but much less 
than that of peraeopod 5. Uropod 3 rather short, outer ramus with small 
narrow 24 joint, inner ramus small, scale-like. Telson short, broad, eleft to 
the base. 


5 species. 


Synopsis of species: 


Pleon segment 3, median dorsal carina rounded -—— 2. 
Pleon segment 3, median dorsal carina triangular — 3. 


1 


Fr RE DE re 1. A. cristata. : . . p.499 
Median dorsal carina beginning on peraeon seg- 

RE SR a 2. A. pusilla . . . . p.500 
Pleon segment 3, carina low . ........ 3. A. maximoviezi . p.500 
Pleon segment 3, carina elevated — 4. 


2 


o 


Pleon segment 4 with small rounded dorsal ex- 
a a I ae a er 4. A.spinosa. . . . p.501 
Pleon segment 4 with no dorsal expansion. . . 5. A.affinis . . . . p.501 


| Median dorsal carina beginning on peraeon seg- 
: | 


. 1. A. cristata O. Sars 1894 A. c. (Amathillinella c. O. Grimm in MS.), G. ©. 
Sars in: Bull. Ac. St.-Petersb., ser.5 v.1 p.202 t.5; 1.6 £.1—8. 


Body stout, little compressed, carina low -on peraeon segment 1, 
gradually enereasing to broad triangular projections, important in size on 
peraeon segments 6 and 7 and pleon segments 1 and 2; the carina of pleon 
segment 3 evenly rounded. Pleon segments 4—6 each dorsally carrying a 
few simple hairs, segments 5 and 6 each with subdorsal spinules, 2 on each 
side. Head, rostrum blunt, lateral lobes broadly truncate, post-antennal 
corners acutely projecting. Eyes rather small, narrowly reniform, dark. 
Antenna 1, pedunele long, 1° joint not greatly longer than 24, nor 24 than 
34, flagellum longer than peduncle, 20—25-jointed, accessory flagellum about 
5-jointed. Antenna 2 much shorter, flagellum more than half as long as 
peduncle, 12-jointed. Gnathopods 1 and 2 in Q small, subequal, setose; 

32* 


500 Amathillina 


6! joint in gnathopod 1 rather broader and more expanded distally than in 
gnathopod 2, where it has a rather narrow oblong oval form, palm in both 
somewhat oblique, defined by an obtuse angle carrying 2 short spines. 
Gnathopods 1 and 2 in © much stronger, nearly equal, 6" joint much 
longer and broader than 5%, somewhat expanded distally, especially in 
gnathopod 2, palm concave, defined by a nearly rectangular corner armed 
with 2. spines. Peraeopods 1—5 rather more elongated in S than in oO, 
with 24 joint of peraeopods 3—5 less expanded, especially in peraeopod 5; 
finger strong, ending in a sharp, eurved point. In peraeopods 3 and 4, 24 joint 
oval, distally narrowed, but in peraeopod 5 broadly expanded behind, hind 
margin serrate and ciliate, the broad distal lobe overlapping the 34 joint. 
Uropods 1 and 2 spinose, peduncle longer than the subequal rami, uropod 1 
much the longer. Uropod 3 short, peduncle much longer than broad, 1° joint 
of outer ramus not much longer than peduncle, armed with 2 faseicles of 
spines on each side, 24 joint narrow, setiferous, '/;, as long as 1°, inner 
ramus very small. Telson broader than long, nearly semicircular, lobes not 
dehiscent, each with a spinule on outer margin, and a spinule and hairs at apex. 
L. © about 13, 9 nearly 15 mm. 


Caspian Sea. Depth 4-66 m. 


2. A. pusilla O.Sars 1896 A.p., G. O.Sars in: Bull. Ace. St.-Pötersb., ser. 5 
v.4 p.446 t.5 f. 15—25. } 


Body very short and stout, especially in ©. Peraeon segments 1—5 
dorsally quite smooth; segments 6 and 7 and pleon segments L—3 carinate, 
each produced dorsally to a distinet laminar projection, the first 4 triangular, 

.the last rounded, gibbous. Pleon segments 4—6 with dorsal hairs. Head 
larger, side-plates 1—4 smaller than in the other species. Eyes oval reniform. 
Antenna 1 very slender and elongate, 1° joint nearly as long as 24 and 34 
combined, flagellum twice as long as pedunele, about 16-jointed, accessory 
flagellum in O 2-, in J 3-jointed. Antenna 2 much theshorter. Gnathopod1inO, 
6th joint rather broad, oval, palm oblique; gnathopod 2, 6% joint unusually 
narrow, oblong linear, palm very short, almost transverse. Gmathopods 1 
and 2 in J powerful, nearly equal, 6 joint in both large and tumid. 
Peraeopod 5, 24 joint well expanded, hind margin serrate rather strongly, 
the distal lobe more produced in the © than in the JS, rather narrowly 
rounded. Uropod 3, pedunele thick, scarcely longer than broad, outer ramus 
little longer than peduncle, with terminal but no lateral spines, its 24 joint 
and the inner ramus very small. Telson broader than long, lobes not 
dehiscent, each with a minute spinule on the obtusely truncate apex. L. 4 mm. 


Caspian Sea. Sublitoral. 


3. A. maximoviczi O. Sars 1896 A. m., A. maximovitschi, G.O. Sars in: Bull. 
Ac. St.-Pötersb., ser.5 &.4 p.444; t.5 f. 1—14. 


Body stout, peraeon not carinate, pleon segments 1—3 each with 
triangular dorsal crest, low in all, lowest in segment 3, segments 1—6 with 
dorsal hairs. Side-plates 1—4 rather small; pleon segments 2 and 3, 
postero-lateral corners minutely produced. Eyes of moderate size, oblong 
oval, not reniform. Antenna 1, 1° joint much thicker and a little longer 
than 24, 24 a little longer than 34, flagellum about twice as long as peduncle, 
20-jointed, accessory flagellum 3-jointed. Antenna 2 in © scarcely half as long 
as antenna 1, in J rather longer than in 9. Gmnathopods 1 and 2 rather small 
in Q, much stronger in C', with 6! joint large, somewhat expanded distally, 


ee a ae 1 er ne Zee 


Amathillina, Carinogammarus 501 


palm oblique, defined by an obtuse corner with several strong spines. 


Peraeopods 1—5 comparatively short and stout. Peraeopod 3, 24 joint oval, . 


narrowed distally. Peraeopod 4, 24 joint, especially in ©, unusually broad, 
rounded quadrangular. Peraeopod 5, 24 joint much expanded, the rounded 


Jower lobe descending below the 34 joint, a little in S, much in ©. Uropod 3, 


pedunele rather longer than broad, outer ramus nearly twice as long as peduncle, 
its 24 joint and the inner ramus small. Telson rather broader than long, 
the narrowly rounded apices rather divergent, each lobe with 2 spinules at 
apex and a hair on outer margin. . L. about 6 mm. 


Caspian Sea (bay of Karabugas).. 


4. A. spinosa U. Sars 1896 A.s. (A. eristata var. spinata O. Grimm in MS.), 
G. O. Sars in: Bull. Ac. St.-Petersb., ser.5 v.4 p. 442 t.4 f.7—16. 

Agreeing with A. cristata (p. 499) in gnathopods 1 and 2 and many 
other respects. Body moderately slender and compressed, peraeon segments 
1—7 and pleon segments 1—3 each raised to a well defined dorsal back- 
ward pointing triangular expansion, successively larger, pleon segment 4 
ending dorsally in a small but well defined rounded expansion, segments 
5 and 6 having only a few dorsal hairs. Eyes reniform, obliquely placed, 
dark. Antenna 1, accessory flagellum in J 6-jointed. Peraeopods 3—5 
differing from those of A. eristata in having the 24 joint comparatively 
narrower, and nearly alike in both sexes. Uropod 3 very short and thick, 
outer ramus scarcely longer than pedunele, only armed with 3 spinules and 
some setules, 24 joint very small, inner ramus scarcely longer than broad. 
Telson short, much broader than long, lobes rather divergent, each with a 
setule on outer margin and 2 hairs at rounded apex. L. © 25 mm. 


Caspian Sea (southern part). Depth 203 m. 


5. A. affinis ©. Sars 1894 A.a., G.O.Sars in: Bull. Ac. St.-Petersb., ser. 5 
v.1 p. 207 t.6 £.9--19. 

Near to A. cristata (p. 499). and still nearer to A. maximoviezi. 
Body short and stout, especially in O0, peraeon segments 1—4 or 1—5 
quite smooth. peraeon segments 6 and 7, pleon segments 1—3 each with 
acutely projecting triangular dorsal carina, pleon segments 4—6 with no 
projection but fine hairs and small subdorsal spinules. Eyes distinetly 
reniform. Antenna 1, including 1° joint, slender, flagellum once and a half as 
long as peduncle, with 13 joints in O,to 30 ind, accessory flagellum 3-jointed. 
Gnathopod 1 in S, 6th joint rather tumid in the middle; otherwise the 
gnathopods 1 and 2 are nearly as in A. cristata. Peraeopods 1—5 and 
uropods 1—3 nearly as in A. maximoviezi. Telson rather longer than broad, 
lobes a little divergent, with no armature, except 3 fine hairs on each obtusely 
pointed apex. L. oO 6, 9 8 mm. 

Caspian Sea. Depth 4-6m. 


_ 


50. Gen. Carinogammarus Stebb. 


1862 Gammaracanthus (part.), Bate, Cat. Amphip. Brit. Mus., p.201 | 1899 Carino- 
gammarus, T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 429. 

Distinguished from Gammarus (p. 460) by having carinate segments; 
carina medio-dorsal only; relative proportions of peduneles of antennae 1 
and 2, of gnathopods 1 and 2 and of inner and outer ramus of uropod 3 
variable. 

9 accepted and 2 doubtful species. 


ae EEE ey ner 
a ze 


502 Carinogammarus 


Synopsis of accepted species: 


1 Uropod 3, inner ramus not short — 2. 
Uropod 3, inner ramus short — 6. 


0 Body carinate throughout -— 3. 
Body only partially carinate — 4. 


Antenna 1, accessory flagellum 3-jointed; gnatho- 
3 pod 3,9 joint oblong: =. 2°... 1. ©. einnamomeus . p. 502 
Antenna 1, accessory flagellum 12-jointed; gnatho- 
pod 2, 6th joint piriform. . » 2.2.2.2. 2.2. 2.0, weg 1, 2: p- 502 
A Eyes halfmoon-shaped ©. 2 23, 22% 2328, 3.05 3. C. pulchellus . . p.503 
Eyes oval — 5. 
5 f Peraeopod 5, 2d joint widened distally. . . . - 4. C. seidlitzii . . . p.5083 
\ Peraeopod 5, 2d joint narrowed distally . . . . 5. C.rhodophthalmus p. 504 
Fleon segments 4 and 5 with erect spinose dorsal 
6 KRnorle a ae 6. C. caspius . . . . p.504 
Pleon segments 4 and 5 without erect dorsal 
tuberele — 7. 


f At least 2 of the peraeon segments carinate . . 7. C. atchensis . . «+ P.505 


e \ At most 1 of the peraeon segments carinate — 8. 


Pleon segments 1—3, carina ti ped with spines. 8. C. subcarinatus . P- 505 
pP P 
\ Pleon segments 1—3, carına acute, without spines 9. C. roeselii . . . - P- 506 
g 


1. C. einnamomeus (Dyb.) 1874 Gammarus c., B. Dybowsky in: Horae Soe. 
ent. Ross., v. 10 suppl. p.114 t.7 £.3 | 1899 Carinogammarus c., T. Stebbing in: Tr. 
Linn. Soc. London, ser.2 v.7 p.429 | 1898 Gammarus fluviatilis (part.)?, A. Della Valle 
in: F. Fl. Neapel, v.20 p. 928. 


Body laterally compressed, its upper surface rough, with delicate hairs in 
various parts; all segments dorsally provided with a distinet though weak 
median carina, occupying the whole length of the segments in peraeon 
segments 4—7 and pleon segments 1—3; hind margin of pleon segments 
4—6 provided with 3 groups of tolerably strong spines, set on hump-like 
elevations. Head, front rounded, little prominent. Side-plates without setae 
on lower margin. Eyes rather large, prominent, reniform, black. Antenna 1, 
pedunele thicker and somewhat longer than that of antenna 2, or rarely 
shorter; with flagellum nearly '/, as long as body, and almost twice as 
long as antenna 2; flagellum 21—-28-jointed, accessory flagellum 3-jointed. 
Antenna 2, flagellum 9—12-jointed. Gmathopod 1, 6" joint piriform. 
Gnathopod 2, 6 joint oblong. Peraeopods 3—5, 24 joint heart-shaped, 
with very short setae wide apart on hind margin. Uropod 3 rather long, 
the outer 2-jointed ramus '/,—'/, longer than the inner, 24 joint more than 
/, as long as 1%, inner ramus longer than peduncle, both rami with plumose . 
setae on inner and simple on outer margin. Colour einnamon-brown. L. 18mm. 


Jake Baikal. Depth 50—100 m. 


2. C. wagii (Dyb.) 1874 Gammarus w., B. Dybowsky in: Horae Soc. ent. Ross., 
v.10 suppl. p.121 t.1 f.4 | 1893 Ceradocus? w., A. Della Valle in: F. Fl. Neapel, v.20 
p-931 | 1899 Carinogammarus w., T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p.429. 


Median carina developed over the whole body, on the head appearing 
as an obscure rounded ridge-line, and gradually enereasing in height to 
pleon segment 3, from peraeon segment 5 running out into an acute, back- 
ward and upward directed angle; this carina occupies the whole dorsal length 
of each segment, is tolerably high, strongly compressed laterally, with convex 


4 


Ad ud u a a Da | Ad 


Carinogammarus 503 


front and concave hind margin; on pleon segments 4—6 becoming hump- 
like and gradually weaker; marginal swellings are perceptible on the peraeon- 
segments and pleon segments 1—4, and on either side of the median carina in 
pleon segments 4—6 are strong humps, carrying 2 or 3 spinules each. Head, 
rostral point short. Side-plates L—4 rather deep, 5" not deep. Eyes slightly 
prominent, reniform, black. Antenna 1 about °/, as long as body, more 
than twice as long as antenna 2, peduncle longer than pedunele of antenna 2, 
and longer than the 70-jointed flagellum, accessory flagellum 11— 13-jointed, 
longer than the 12-jointed flagellum of antenna 2. Gnathopods 1 and 2, 
6th joint rather large, piriform, finger long. Peraeopods 3—5, 24 joint heart- 
shaped, longitudinally carinate (in figure). Uropod 3 reaching back much beyond 
the others, the rami subequal, long, not foliaceous, both with numerous plumose 
setae and (in figure) with short stout spines, 24 joint of outer ramus rudimentary. 
Colour bright yellow, with delicate marking. L. 46 mm. 


Lake Baikal. Depth 70—150 m. 


3. C. pulchellus (Dyb.) 1874 Gammarus p., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.118 t.5 f.4 | 1899 Carinogammarus p., T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 v.7 p.429 | 1898 Gammarus flwviatilis (part.)?, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 930. 


Peraeon segment 7 and segments of pleon with a low es carina, 
which is obscurely developed on pleon segment 6; surface of body with delicate 
hairs on the hind part of the segments. Head with a small subacute rostrum. 
Side-plates 1—4 rather deep, with numerous setules on lower margin, 4!h broad, 
well emarginate behind; pleon segment 3, postero-lateral corners quadrate. 
Eyes rose-red, so placed on lateral lobes as to show partly in front between 
antennae 1 and 2, halfmoon-shaped, convex margin in front, bind margin 
irregular, cut into lobes. Antenna 1 about '/, as long as body, nearly 
twice as long as antenna 2, 1° joint thick, flagellum with 20—29 rather 
long joints, accessory flagellum with 3 or 4. Antenna 2, flagellum 6—9-jointed. 
Mandible, 39 joint of palp curved, much shorter than 24, Gnmathopods 1 and 2 
small, slender, 5tk joint rather long, especially in gnathopod 2, 6t& joint 
oblong, with palm oblique in gnathopod 1, but transverse in gnathopod 2, 
the joint being also slightly widened at the palm, finger short. Peraeopod 3, 
24 joint nearly circular. Peraeopods 4 and 5, 24 joint wide, with a distal 
narrowing, many spinules and setae on the expanded part. Uropod 1 is 
said to reach as far back as uropod 3, or in O somewhat farther. Uropod 3, 
inner ramus longer than 1% joint of outer, both beset with spines and plumose 
setae, 24 joint of outer about "/, as long as 1%. Telson with a few setules 
on the obtuse but narrow apices of the tapering lobes. Colour very delicately 
reddish white. L. reaching 23 mm. 


Lake Baikal. Depth 100—700 m. . 


4. C. seidlitzii (Dyb.) 1874 Gammarus s., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.119 t.5 £.5 | 1899 Carinogammarus s., T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 v.7 p.429 | 1893 Gammarus flwiatilis (part.)?, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 930. 


Peraeon segments 6 and 7 and pleon sogments 1—3 with a weak median 
carina forming a tuberele at about the middle of the segments; the spinules 
on the 5" and 6th pleon segments are extremely delicate; head, peraeon, and 
pleon segments 1—3 dorsally beset with delicate hairs, longest on hind 


margin of peraeon segments. Head narrow, rostrum subacute, not large. Side- 


plates 1—4 with long setae on lower margin. Eyes moderately large, not very 


504 Carinogammarus 


prominent, oval, a little widened .below, red. Antenna 1 rather less than 
/, as long as body, twice as long as antenna 2, 1° joint stout, flagellum 
27—34-jointed, accessory flagellum 4- or 5-jointed. Antenna 2, flagellum 
9-jointed. Gnathopods 1 and 2 seemingly almost as in C. pulchellus (p. 503), 
but 6% joint of gnathopod 1 more piriform, and palm in ‚gnathopod 2 
less completely transverse. Peraeopod 3, 24 joint carried in motion of 
the animal at an acute angle to the long axis of the body, the expansion 
ending in a lobe below. Peraeopod 5, 24 joint little longer than broad, its 
greatest breadth being at the distal end. Uropods 1 and 2 not long, reaching 
nearly to end of uropod 3. Uropod 3, inner ramus longer than 1° joint 
of outer. The deeply eleft telson is ; deseribed as long. Colour en L. reaching 
about 17 mm. 
Lake Baikal. Depth 50—100 m. 


5. C. rhodophthalmus (Dyb.) 1874 Gammarusr. + @.r. var. mierophthalmus, 
B. Dybowsky in: Horae Soe. ent. Ross., v.10 suppl. p.116, 117 t.14 £.10 | 1899 Carino- 
gammarus r., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.429 | 1898 Gammarus 
flwiatilis (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 930. 


Peraeon segments 6 and 7 and pleon segments I—4 or 1—5 with 
a weakly indicated median tubercular carina, pleon segment 6 with 2 groups 
of delicate spinules; (in var. microphthalmus carina extending to pleon segment 
5, or only to 3; pleon segment 6 with a pair of setae). Head, front shortly 
produced, obtusely triangular. Side-plates 1—4 setose on lower margin, 
4th hroad, well emarginate; pleon segment 3, postero-lateral corners quadrate. 
Eyes very large, prominent, broadly oval, oecupying nearly half the lateral 
surface of head, the front part turned forward and inward, ruby-red, (in the 
variety much smaller, but still tolerably large, black or reddish black). 
Antenna 1 half (in. the variety more than half) as long as body, twice as long 
as antenna 2, 1° joint stout, flagellum 37—44- (in the variety 8—34-) 
jointed, accessory flagellum 3—5-jointed. Antenna 2, flagellum 7—-11-jointed. 
Gnathopods 1 and 2 small, subequal, 5!" joint not elongate, 6! piriform in 
gnathopod 1 (in figure oblong, with oblique palm; in the variety described as 
oval); 6! joint in gnathopod 2 oblong, narrower than in gnathopod 1. palm 
much less oblique. Peraeopods 3—5, 24 joint with the expansion abruptly 
narrowing below, though less so in peraeopod 5 than in 3 and 4; in all 
the hind margin armed with loıig setae. Uropod 3, inner ramus about as 
long as 1° joint of outer (in variety the rami subequal). Colour white or 
bright yellow. L. 14—20 mm. 


Lake Baikal, Depth 8—100 m. 


6. C. easpius (Pall.) 1771 Oniscus e., Pallas, Reise Ruß., «.l p.477 ! 1841 
Gammarus c., Eichwald in: N. M&m. Soc. Moscou, ®%.7 p.230 | 1894 @.ce., G. O. Sars 
in: Bull. Ae. St.-Pötersb., ser.5 v.1 p.210 t.7 | 1899 Carinogammarus c., T. Stebbing 
in: Tr. Linn. Soc. London, ser. 2 v. 7 p. 430 | 1862 Gammarus semicarinatus, Bate, 
Cat. Amphip. Brit. Mus., p. 204 t.86 f.3 | 1893 @. fluviatilis (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 763. 


Peraeon segment 7 sometimes slightly carinate and produced to a small 
tooth; pleon segments 1—3 strongly carinate, each produced into a large 
acute backward pointing tooth; segments 4 and 5 each with an elevated 
flat-topped dorsal tuberele, capped by 2 pairs of spines, segment 6 with 1 
pair of subdorsal spinules.. Head, rostrum almost obsolete, lateral lobes broad, 
obtusely truneate. Side-plate 4 much the largest. Pleon segments 2 and 3, 
postero-lateral corners acute. Eyes oblong reniform, sometimes dark. Antenna 1 


ed 73 


Carinogammarus 505 


slender, nearly half as long as body, 1% joint subequal to 24 and 34 combined, 
flagellum longer than pedunele, accessory flagellum 5-jointed. Antenna 2 
much shorter, ultimate joint of peduncle shorter than penultimate, flagellum 
about 10-jointed.. Gnathopods 1 and 2, 5th joint short, cup-shaped, 6t" oblong 
oval, palm somewhat oblique, shorter than hind margin, defined by obtuse 
angle with strong spine; gnathopods stronger in JS than in Q, and gnathopod 2 
considerably larger than gnathopod 1. Praeopod 1 longer than peraeopod 2. 
Peraeopod 3 shorter than 4 and 5, 24 joint little longer than broad, slightly 
narrowed distally. Peraeopod 4, 24 joint longer, distally more narrowed. 
Peraeopod 5, 24 joint longer, oblong quadrangular, hind margin as in peraeopods. 
3 and 4 serrate. Uropods 1 and 2, rami subequal, with lateral and apical 
spines. Uropod 3 reaching much beyond the others, short peduncle with 4 
spines on apical margin, outer ramus nearly thrice as long as peduncle, fringed 
round with long plumose setae, 24 joint minute; inner ramus_ scale-like, 
!/, as long as peduncle, with 1 spinule on inner margin and 1 on apex. 
Telson scarcely so long as broad, each subeonical lobe with 2 spinules and 
some hairs on the obliquely truncate apex. L. © 13, J 16 mm. 

Caspian Sea. Depth 1—37 m. 

7. C. atehensis (F. Brandt) 1851 Gammarus a., F. Brandt in: Middendorff, 
Reise Sibirien, ©.21ı p.138 t.6 f.29 | 1862 @. a., Bate, Cat. Amphip. Brit. Mus., p. 217 
t.88 f.7 | 1899 Carinogammarus a.. T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 
p. 430 | 1893 Melita palmata (part.)?, A. Della Valle in: F. Fi. Neapel, v.20 p. 765. 

Peraeon segments 1—3 dorsally rounded, segments 4 and 5 obscurely, 
6 and 7 feebly carinate; pleon segments 1—3 pretty strongly carinate, 
segment 4 slightly carinate in front, behind, like segments 5 and 6, rounded; 
segments 1—3 with rows of spinules on hind margin, and between these and 
the carina-tooth a low eminence also beset with rows of spinules; segment 4 
with 2 curved eminences on each side, pectinate with 4— 7 spinules; segment 5 
with 1 or 2 or even 3 such eminences, earrying 6 or 7 or fewer spinules, 
segment 6 with a front inner very small pair of eminences, and a more 
spiny outer larger pair behind. Head, rostrum very short. Eyes long elliptie 
or somewhat reniform. Antenna 1 scarcely half as long as body, flagellum 
longer than peduncle, 33-jointed, accessory flagellum 7-jointed, about '/, as 
long as primary. Antenna 2 shorter, flagellum 19-jointed. Gnathopods 1 and 2 
subequal, or gnathopod 1 rather the larger, 5!" joint short, cup-shaped, 
6!" rhomboidal, little longer than broad, a little widened to the palm, 
which is furnished with little teeth or spines and obliquely truncate in 
gnathopod 1, but almost transverse in gnathopod 2. Peraeopods 1—5 stoutly 
built, rather short, with faseicles of spines but few setae. Uropods 1 and 2, 
rami short, broad, strong and spinose. Uropod 3 as long as the preceding 
or longer, rami spinose, lanceolate, inner not half as long as outer, scale- 
like (in figure). Telson cleft to the base, as long: as short pedunele of uropod 3, 
each subeonical lobe with 3 spinules at apex. L. 25 mm. (According to 
Brandt; Bate differs in many respects.) \ 

Behring Sea (Isles of Atcha and Unalaschka). 

8. C. subearinatus (Bate) 1862 Gammarus s. (Stimpson in MS.), Bate, Cat. 
Amphip. Brit. Mus., p.205 t.36 £.5 | 1899 Carinogammarus s., T. Stebbing in: Tr. Linn. 
Soe, London, ser.2 v.7 p.430 | 1893 Gammarus marinus (part.)?, A. Della Valle in: 
F. Fl. Neapel, v.20 p. 76». 

Pleon segments 1—3 having the dorsal median line slightly elevated 
into a carina, with a faseiele of short spines on the blunt apex of the carina 
(figure), a fascicle of spines on either side, encreasing in importance on successive 


506 Carinogammarus 


segments to end of pleon, segments 4—6 with no median carina. Eyes oval- 
Antennae 1 and 2 subequal, '/, as long as body. Gnathopod 1 the larger, 
5th joint short, eup-shaped, 6% broadly oblong oval, palm slightly concave, 
slightly oblique, set with several short spine-teeth, finger with an obtuse 
projection near middle of inner margin. Gnathopod 2, 6! joint narrowly 
oblong, hind margin serrate and setose, palm transverse, sinuous, armed as 
in gnathopod 1; finger as in gmathopod 1. Peraeopods 1—5 subequal, 
spinose. Peraeopods 3—5, 24 joint seemingly piriform. Uropod 3, outer 
ramus thrice as long as inner. Telson not spinose. L. 25 mm. 

Behring Strait. 

9. C. roeselii (Gerv.) 1755 „Squilla (Astacus) fluviatilis“, Rösel, Insecten- 
Belustig., v.3 p.351 t.62 f.1--7 | 1835 Gammarus roeselü, P. Gervais in: Ann. Sei. 
nat., ser.2 v.4 p.128 | 1850 G. flwiatilis (non H. Milne Edwards 1830!), @. röselii, 
Hosius in: Arch. Naturg., v.161 p.234 t.3,4 | 1899 Carinogammarus f., T. Stebbing 


in: Tr. Linn. Soc. London, ser.2 v.7 p.430 | 1841 Gammarus pulex (err., non J.C. 
Fabrieius 1775!), ©. L. Koch, ©. M. A., v.36 nr. 21. 


Peraeon segment 7 produced to a small tooth; pleon segments 1—3 
each rounded in front. behind produced to an acute, carinate tooth, devoid 
of spines, segments 4 and 5 with slight median elevation, carrying apical 
spines, and a raised group of spines on either side, slightly to the rear of 
the middle one, segment 6 with a pair of slight subdorsal elevations carrying 
spines. Head, rostrum obsolete, lateral lobes obtuse, post-antennal corners 
produced acutely forward. Side-plates 1—4 rather deep, 4 the largest. 
Pleon segment 3, postero-lateral corners acute. Eyesreniform, black. Antennal, 
flagellum 34-jointed, accessory flagellum with 4 joints, of which 1° und 4th 
are very short. Antenna 2, ultimate joint of peduncle longer than penultimate, 
flagellum 15-jointed. Gnathopods 1 and 2 subequal, 5t% joint short, 6% piriform 
in gnathopod 1, oblong in gnathopod 2. Uropods 1 and 2, outer ramus 
rather shorter than .inner. Uropod 3 probably as in C. caspius (p. 504). 
Telson completely cleft, lobes divergent, tipped with spines. Colour greyish 
brown with red spots, conspieuous on tips of dorsal teeth. L. 14 mm. 

Europe. Rivers and ponds. 


C. macrophthalmus (Stimps.) 1853 Gammarus m.. Stimpson in: Smithson. 
Contr., v.6 nr.5 p.55 | 1862 Gammaracanthus m., Bate, Cat. Amphip. Brit. Mus., p.203 | 
1893 Ceradocus? m., A. Della Valle in: F. Fl. Neapel, v.20 p.929 | 1894 Amathilla? m., 
G. O. Sars, Crust. Norway, v.1 p.494 | 1899 Carinogammarus? m., T. Stebbing in: 
Tr. Linn. Soe. London, ser.2 v.7 p. 480. 

Carinate only at the pleon. Side-plates small. Eyes large, subreniform, approxi- 
mate. Antenna 1, accessory flagellum scarcely perceptible. Uropods 1 and 2, outer 
ramus the shorter. Uropod 3, rami broad lanceolate, shorter than in Gammarellus 
homari (p. 387). Colour bright erimson, or red and white mottled. L. 12 mm. 

Fundy Bay (Grand Manan). Low-water mark, and Laminarian zone. 


C. mucronatus (Say) 1818 Gammarus m., Say in: J. Ac. Philad., v. Im p.376 | 
1873 G. m., (S. I. Smith in:) A. E. Verrill in: Rep. U.S. Fish Comm., v.1 p.559 | 
1862 Gammaracanthus m., Bate, Cat. Amphip. Brit. Mus., p. 203 | 1894 Amathilla? m.. 
G. O. Sars, Crust. Norway, v.1 p.494 | 1899 Carinogammarus? m., T. Stebbing in: 
Tr. Linn. Soe. London, ser.2 v.7 p. 430 | 1893 Gammarus er ree (part.)?, A. Della 
Valle in: F. Fl: Neapel, v.20 p. 729. 


Pleon segments 1—3 mucronate above, but (Smith) not distinetly carinate, seg- 
ments 3—5 carrying faseicles of spines. Eyes blackish, irregularly reniform, truncate 
above. Antennae 1 and 2 subequal. Antenna 1, flagellum 20-jointed, accessory 
flagellum reaching end of 4th joint of primary. L. less than 12-5 mm. 

North-Atlantie (North Carolina, Cape Cod, usually in brackish water; Florida). 


Gammaracanthus 507 


51. Gen. Gammaracanthus Bate De 


1862 Gammaracanthus (part.), Bate, Cat. Amphip. Brit, Mus., p.201 | 1871 @., 
A. Boeck in: Forh. Selsk. Christian., 1870 p. 214 | 1894 @., G. O. Sars, Crust. Norway, 
©.1 p.493 | 1894 @., T. Stebbing in: Bijdr. Dierk., v.17 p.41. 


Body carinate throughout, carina in many segments produced into 
a tooth, lower margin of peraeon segments carinate, this carina continued 
along middle of pleon segments I—3 or 1—4. Head, rostrum long, acute, 
lateral corners small, rounded, with prominent process below. Side-plates 
1—4 ridged from above downward, parallel-sided, 5t" nearly as deep as 4th, 
its front lobe the deeper. Eyes rather prominent, not very large. Antenna 1 
with accessory flagellum. Antenna 2 much shorter, siender. Upper lip rounded. 
Lower lip, inner lobes incompletely separated from outer. Mandible normal, 
34 joint of palp as long as 24. Maxilla 1, several (6) setae on inner plate, 
11 spines on outer. Maxilla 2, inner margin fringed. Maxillipeds, palp 
elongate. Gnathopods 1 and 2, 5!" joint short, cup-shaped, 6!" powerful, 
finger long. Peraeopods 3 and 4 much longer than 1°, 24 or 5th, Peraeopods 
3—5, 24 joint little expanded. Uropod 1, rami shorter than peduncle, equal. 
R Uropod 3, rami longer than peduncle, sctose, laminar, ending obtusely. Telson 
F very small, bilobed. 


E 3 species. 


in na 


BAR a ” 


Synopsis of species: 


Pleon segments 2 and 3, postero-lateral corners acutely 


Pleon segments2 and, postero-lateral cornersquadrate 1. G. lacustris. . p.507 
i | 
produced — 2. 


Rostrum eurved, produced beyond 1st jointof antenna 1 2. G. loricatus. . p. 508 
2 Rostrum almost straight, not produced beyond 18st joint 

DER en TER EIE Hana 3. G. caspius . . p.508 

1. G. lacustris O. Sars 1861 Gammarus loricatus (err., non Sabine 1821'), 

S. Loven in: Öfrv. Ak. Förh., 0.18 p.287 | 1867 Gammaracanthus 1. var. lacustris, G. 

O. Sars, Crust. d’Eau douce Norvöge, p.73 t.7 f.1--8 | 1888 @. lacustris, T. Stebbing 

in: Rep. Voy. Challenger, v.29 p.1699 | 1894 @. relietus, G. O. Sars, Crust. Norway, 
v.1 p.494 t. 174 | 1896 @. r., G. O. Sars in: Bull. Ac. St.-Petersb., ser.5 v.4 p.439. 


Body slender and compressed, dorsal carina rather low in front, projeetions 
scarcely beginning till peraeon segment 5, those following to pleon segment 5 
very acute. Head, rostrum very slightly curved, not reaching end of 1° joint of 
antenna 1, lateral corners very small, projection below tubereuliform. Pleon 
segment 3, postero-lateral corners quadrate. Eyes rather small, rounded, 
dark. Antenna 1 nearly !/, as long as body, 34 joint not very. short, 
flagellum rather longer than peduncle, about 22-jointed, accessory flagellum 
4-jointed. Antenna 2 little more than '/, as long as antenna 1, basal 
joint tumid, ultimate joint of peduncle shorter than penultimate, flagellum 
7-jointed. Gmnathopod 1 fully as large as gnathopod 2, 5!" joint produced 
to a small narrow setiferous lobe, 6" expanding to beginning of palm, which 
is convex, scarcely longer than hind margin, defined by an obtuse angle and 
several spines, one rather long. Gnathopod 2, 6" joint oblong oval, broadest 
near the base, tapering distally, palm very oblique, much longer than hind 
margin. Peraeopods 1 and 2 little longer than gnathopods 1 and 2. Peraeopods 
3 and 4 extremely slender and elongate, 5t" joint much longer than 4%, 
Peraeopod 5, 24 joint a little more expanded proximally than in other peraeopods. 


508 Gammaracanthus, Acanthogammarus 


Uropod 3, rami fringed with plumose setae. Telson nearly twice as broad 
as long, cleft wide, angular, more than half the length. L. Q 35 mm. 


Sweden, Norway, Russia. Lakes. 


. 2. G. lorieatus (Sab.) 1821 & 24 Gammarus I., E. Sabine in: W. E. Parıy, J. 
Voy., Suppl. p.53 t.1 £.7; p.281 t.1 f.7 | 1838 @.1., Kröyer in: Danske Selsk. Afh., 
v.7 p.250 t.1£.4 | 1866 @.1., Goesin: Ofv. Ak. Förh., v.22 p.531 | 1862 Gammaracanthus!., 
Bate, Cat. Amphip. Brit. Mus., p.202 t.36 f.2 | 1876 @. L, A. Boeck, Skand. Arkt. 
Amphip., v.2 p.400 | 1894 @.1., T. Stebbing in: Bijdr. Dierk., 0.17 p.40 | 1893 Ceradocus 1., 
A. Della Valle in: F. Fl. Neapel, v.20 p.719. 


Near to G. lacustris (p. 507). Body rather stouter. Dorsal carina well deve- 
loped from rostrum to pleon segment 5 inclusive, variably shaped on the anterior 
peraeon segments. Head, rostrum curved, projecting beyond 1°t joint of antennal, 
lateral corners rounded, not very large, projection below boldly prominent. 
Pleon segments 2 and 3, lateral corners acutely produced. Eyes rather small, 
oval reniform, dark., Antenna 1, flagellum 30-jointed, accessory flagellum 
4-jointed. Antenna 2, flagellum 12—16-jointed. Gmathopods 1 and 2 
similar to those of G. Jacustris, but more robust and gnathopod 2 decidediy 
larger than gnathopod 1. Peraeopods 3—5 a little stronger than in G. laecustris. 
Colour yellowish white. L. reaching 43—58 mm. 


Arctic Ocean (Greenland, Spitzbergen, Nova Zembla, Siberia). Depth 79 m. 


3. G. caspius O. Sars 1880 G.c. (nom. nud.), OÖ. Grimm in: Arch. Naturg., 
v.461 p.119 | 1896 @. c., G. O. Sars in: Bull. Ac. St.-Petersb., ser.5 v.4 p.439 t.4 f.1—6. 


Very like G. lorieatus, but rostrum nearly straight, only reaching 
apex of 1° joint of antenna 1, projections below lateral eorners of head less 
prominent; pleon segments 2% and 3, postero-lateral corners less produced. 
Antenna 2, flagellum shorter than ultimate joint of pedunele, 8-jointed. 
L. 36 mm. 


Caspian Sea. Depth 203 m. 


52. Gen. Acanthogammarus Stebb. 
1899 Acanthogammarus, T. Stebbing in: Tr. Linn. Soc. London, ser. 2°v.7 p. 430. 
Body with median more or less dentate carina, and also lateral or 
marginal carinae more or less developed. Head, rostrum very short. Side- 


plate 5 much shallower than 4". Antenna 1 the longer, accessory flagellum 
usually much developed, always with more than 1 joint. Mouth-parts normal. 


Peraeopods 3 and 4, 24 joint narrowed below. Uropod 3, rami subequal,- 


not foliaceous. Telson deeply cleft. 
6 species. 
Synopsis of species: 
N Uropod 3, outer ramus shorter than inner — 2. 
Uropod3, outer ramus not shorter than inner — 3. 
j Peraeopod 5 shorter than the body... . . 1. A. cabanisii : . . . p.509 
\ Peraeopod 5 longer than the body... . . 2. A. zienkowiczii . . . p.509 
3 | Side-plates 1—4 with lower margin concave . 3. A.godlewskii. . . . p.510 
Side-plates 1—4 withlower margin not concave — 4. 
4 j Side-plate 4 with outward projeeting process 4. A. radoszkowskii.. . p.510 
\ Side-plate4 withoutoutward projeeting process — 5. j 
5 | Median carina without dentices ...... 5. A.armatus..... p.511 
Median carina with dentieles. .. ..... 6. A. parasiticus . . . p.5ll 


I. 0 


NE RN RM, 
” Ba Hu iin fu auce 


a NEE TE SER 


Acanthogammarus 509 


1. A. cabanisii (Dyb.) 1874 Gammarus ce, B. Dybowsky in: Horae Soe. ent. 
Ross., v. 10 suppl. p. 122 t. 13 f.5 | 1899 Acanthogammarus e., T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 v.7 p.430 | 1893 Pallasea cancellus (part.)?, A. Della Valle in: F. 
Fl. Neapel, v.20 p. 928. = 

Median carina on all segments, on peraeon segments 1—5 in the form 
of low, narrow, tooth-like processes, looking in side-view like little triangles, 
on peraeon segments 6 and 7 and pleon segments 1—3 in form of acute, 
backward direeted divided spines or of narrow, tolerably acute, and high 
2-jointed teeth; all segments have also a flat, distinet marginal swelling, 
and the pleon segments also on the hind margin a hump, carrying 1 or 2 
spines. Head smooth above, not inflated in the ocular region, rostrum 
acute, slightly directed upward, separated by a deep cavity from the lateral 
lobes. Side-plates 1—4 distally acute, the 1° almost spine-like, greatly 
advanced forward over the cheeks. Eyes small, point-like, white. Antenna 1 
longer than the body, 4—6 times as long as antenna 2, 1° joint prismatic, 
tapering, much longer than 2% and 3% combined, twice as long as ultimate 
joint of pedunele in antenna 2, flagellum very long, 84—108-jointed, accessory 
flagellum 8-jointed. Antenna 2, ultimate joint of peduncle serrato-dentate 
on inner margin, flagellum tapering, with 17 joints set obliquely, of serrate 
appearance and furnished (?) with ealceoli. Gmathopods 1 and 2, 6 joint 
is described as piriform, with broad base (in figure rather oblong oval, with 
no palm distinguishable). Peraeopods 3—5, 24 joint nearly thrice as long 
as broad, almost linear, with the wing slightly developed above. Peraeopods 
4 and 5 shorter than the body. Uropod 1 reaching much beyond uropod 3. 
Uropod 3, outer ramus about '/, shorter than the inner, both having numerous 
plumose setae. Telson cleft to the middle, apices acute (in figure blunt). 
Colour white. L. 55 mm. 


Lake Baikal. Depth 200—700 m. 


2. A. zienkowiezii (Dyb.) 1874 Gammarus z., B. Dybowsky in: Horae Soe. 
ent. Ross., ©. 10 Suppl. p.124 t.3 £.5 | 1899 Acanthogammarus z., T. Stebbing in: Tr. 
Linn. Soe. London, ser. 2 v.7 p.430 | 1893 Ceradocus? zienkoviezii, A. Della Valle in: 
F. Fi. Neapel, v.20 p. 931. 


Median carina more or less strongly developed throughout peraeon and 
pleon, on peraeon segment 1 asa hump with 3 teeth, 2 side by side bending 
forward in front, a 34 behind bending back; on peraeon segments 2—6 
commonly as a ridge with blunt hump in front and acute, forward bent tooth 
behind; on pleon segments 1—3 the carina is higher, and has a 34, acute, 
straight tooth; on segment 4 there is a hump and a straight tooth, on segments 
5 and 6 usually no tooth; on peraeon segments 1—5 the margins are swollen; 
on all ‘the others, on the hind margin over the marginal swellings, there 
is a hump which runs out into an acute, outward and backward directed 
tooth. Head smooth, rostrum short, acute. Side-plates 1—4 shallow, 
1° — 34 distally narrowed (not in figure) and rounded; 4 broad, the hind 
emargination (in figure) extending the whole depth of the plate. Eyes small, 
point-like, violet. Antenna 1 nearly twice as long as body and seven times 
as long as antenna 2, 1° joint as in A. cabanisii, flagellum of great length, 
108—119-jointed, accessory flagellum 5-jointed. Antenna 2, ultimate joint 
of peduncle thickened, projecting over base of flagellum and armed with 
long stout plumose setae, flagellum 7-jointed. Gnathopod 1, 6tk joint piriform. 
Gnathopod 2 somewhat larger, 6! joint oblong, hind margin and palm convex. 


- Peraeopods 3—5 very long and fragile, 24 joint almost linear. Peraeopods 


4 and 5 longer than the body. Uropod 3, outer ramus about */,, shorter 


510 Acanthogammarus 


than inner, both with numerous plumose setae. Telson divided. Colour 
rose-red or violet, with yellowish shimmer above. L. 32 mm. 


Lake Baikal. Depth 300-700 m. 


3. A. godlewskii (Dyb.) 1874 Gammarus g. + @.g. var. vietorii, B. Dybowsky 
in: Horae Soe. ent. Ross., v.10 suppl. p. 143, 144 t.1 f.6 | 1895 Ceradocus? g., A. Della 
Valle in: F. Fl. Neapel, v.20 p. 928 | 1899 Acanthogammarus g.. T. Stebbing in: Tr. 
Linn. Soe. London, ser.2 v.7 p.430. 


Median carina usually on peraeon segments 1—4 forming short, blunt 
teeth, on peraeon segments 5—7 and pleon segments 1—3 long, acute teeth, 
those on peraeon segment 7 and pleon segment 1 the longest, on pleon segment 
4 a short, blunt tooth; on pleon segments 5 and 6 the carina is weak, 
not dentate; the coalesced marginal and lateral carinae on peraeon segments 
1—3 represented by short teeth standing out horizontally from the body and 
directed somewhat backward; on segment 4 the tooth is of unique size, (especially 
in var, vietorü); on segments 5—7 the teeth are short; on pleon segments 
1—4 giving place to flat swellings, and on segments 5 and 6 unrepresented. 
Head rough above, with a depression at the front, rostrum short, acute. 
Side-plates 1—4 with concave lower margin, 1° produced acutely forward, 
24 and 34 rather narrowed distally; 4" pentagonal, much deeper than 5th, 
with lateral projecting spine-like tooth near lower margin. Eyes prominent, 
reniform, black. Antenna 1 longer than half the body, more than twice as long as 
antenna 2, peduncle thicker and longer than that of antenna 2, or in variety 
more slender and shorter, 39 joint in J as long as 1°, or rather longer, 
flagellum 50—60-jointed, accessory flagellum 10-jointed. Antenna 2, ante- 
penultimate joint of peduncle in J eylindrie, in Q flattened and about 5 times 
as long as broad, flagellum 11-jointed. Gnathopods 1 and 2, 6t& joint piriform, 
in gnathopod 2 hind margin more convex than in gnathopod 1. Peraeopods 
3—5, 24 joint narrow, longitudinally carinate; in peraeopods 3 and 4 the 
hind margin slightly sinuous, in 5tk slightly convex, in all fringed with 
short, simple setae. Uropod 1 reaching beyond uropod 3. Uropod 3, inner 
ramus little shorter than outer, both with numerous plumose setae. Telson 
divided to the centre, or ‘(in the variety) more deeply. Colour reddish or 
brownish yellow. L. reaching 76 mm. 


Lake Baikal. Depth 10—150 m. 


4. A. radoszkowskii (Dyb.) 1874 Gammarus r., B. Dybowsky in: Horae Soc. 
ent. Ross., v.10 suppl. p.149 t.13 f.3 | 18938 Ceradocus? r., A. Della Valle in: F. Fl. 
Neapel, v.20 p. 930 | 1899 Acanthogammarus r., T. Stebbing i in: Tr. Linn. Soe. London, 
ser.2 v.7 p.430. 


Median carina on peraeon segments 1—7 and pleon Free 1—3 
tubereular, on pleon segments 4 and 5 forming a strong, broad tooth, with 
humps on'the front surface, on pleon segment 6 reduced to a feeble elevation; 
lateral carinae on peraeon segments 1—7 and pleon segments 1—3 consisting of 
little humps, successively smaller; marginal carinae represented by feeble 
swellings, those on pleon segments 4 and 5 each carrying 2 or 3 spine-points. 
Head, upper surface level, rostrum very short, much less advanced than the sub- 
quadrate lateral lobes. Side-plate 1 slightly "expanded below and direeted 
forward, 4 hroad, convex in front and below, behind produced outward into a large 
semicylindrical blunt tooth. Pleon segments 2 and 3 (in figure), postero-lateral 
corners quadrate. Eyes small, often point-like, irregular in shape, white. 
Antenna 1 scarcely ’/, as long as body, about twice as long as antenna 2, 
pedunele not thicker but shorter than peduncle of antenna 2, flagellum 


u 
> 
AN 
2: 
T. 
5 


DEE a 5 0 15 En Pen Se Fa N nn le a ha rt Ber 


Acanthogammarus 511 


34-jointed, accessory flagellum 4-jointed. Antenna 2, flagellum 10-jointed. 
Gnathopods 1 and 2, 5th joint short, 6" tending to oblong, but widening 
somewhat to the palm, especially in gnathopod 1, which has the palm more 
oblique than that of gnathopod 2. Peraeopods 3 and 4, 24 joint heart-shaped, 
with long setae on hind margin. Peraeopod 5, 24 joint well expanded, 
oblong, but with the wing not quite reaching the top of the 39 joint. Uropod 1 
not reaching beyond uropod 3. Uropod 3, inner ramus very little shorter 
than outer, both with plumose setae on inner, and simple setae on outer 
margin. Telson divided. Colour brownish. L. 45 mm. 


Lake Baikal. Depth 100—200 m. 


5. A. armatus (Dyb.) 1874 Gammarus a., B. Dybowsky in: Horae Soe. ent. 
Ross., v.10 suppl. p.146 t.12 f.1 | 1893 Ceradocus? a., A. Della Valle in: F. Fl. Neapel, 
v.20 p. 927 | 1899 Acanthogammarus a., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 
v.7 p.430. ; 


Median carina on peraeon segments 1—7 composed of lateral compressed 
humps, successively larger, on pleon segments I—3 represented by 2 groups 
of spines, arranged in sets of 3—5 on low elevations, on pleon segments 
4—6 represented only by 4 spines on the hind margin of each segment; 
lateral carinae of peraeon, placed high up on the back, composed of strong 
ridge or tooth-like prominences, strongly compressed from before backward, 
directed obliquely to the long axis of the animal and bent backward, the 
upper rounded margin beset with 2—7 spines. Head smooth, rostrum short. 
Side-plates carry only 2 short, spine-like setae. Pleon segment 3, postero- 
lateral corners rounded. Eyes rather large, oval reniform, slightly prominent, 
black. Antenna 1 about ”/, as long as body, 4—5 times as long as antenna 2, 
with peduncle stouter and twice as long, 1° joint little longer than either 
24 or 34, which are subequal, flagellum 30—47-jointed, accessory flagellum 
3—5-jointed. Antenna 2, flagellum 5—8-jointed. Gnathopod 1, 6%% joint piriform. 
Gnathopod 2, 6% joint oblong. Peraeopods 3—5, 24 joint heart-shaped, lower hind 
corner quadrate. Uropod 1 not reaching beyond uropod 3. Uropod 3, outer 
ramus !/—!/, longer than inner, both with plumose setae on inner margin. 
Telson divided, the division (in figure) reaching to the base, the lobes conical, 
not so long as peduncle of uropod 3. Colour bright horn-brown with darker 
marbling and a lighter band across peraeon. L. reaching over 24 mm. 


Lake Baikal. Depth 10m. 


6. A. parasiticus (Dyb.) 1874 Gammarus p., B. Dybowsky in: Horae Soe. 
ent. Ross., v.10 suppl. p.147 t.3 £.3 | 1893 Ceradocus? p., A. Della Valle in: F. Fl. 
Neapel, v.20 p. 929 | 1899 Acanthogammarus p., T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 v.7 p.430. 


Median carina on peraeon segments 1—7 forming tooth-like elevations, 
on pleon segments 1—3 keel-like, all beset with a tolerably constant number 
of spines; the divided tooth of peraeon segment 1 with 3 pairs of 
spines, segment 2 with 4 or 5, segment 3 with 4—6, the rest with 2 or 3; 
pleon segments 1—3 each with 2 spines at the base and several others; 
pleon segments 4—6 without spines; marginal carinae immediately over the 
side-plates, on peraeon segments 1—7 tooth-like elevations, each with 3—5 
spines, on pleon segments 1—3 represented by very weakly developed 
tubereular humps, each with 1 spine Head with short rostrum, and 
16—18 denticles distributed over the upper surface and sides. Side-plates 
1—4 with only isolated short setae. Eyes roundish, very prominent, black. 


Ben 
> RT 


512 Acanthogammarus, Gammaridarum species incertae sedis 


‚Antenna 1 as long as body, almost thrice as long as antenna 2, with pedunele 
stouter and almost twice as long, flagellum 27-jointed, accessory flagellum 
2-jointed. Antenna 2, flagellum 8-jointed. Gnathopod 1, 6 joint piriform. 
Gnathopod 2, 6 joint oblong, widened towards the palm. Peraeopods 3—5, 
24 joint not widely expanded, hind margin acute-angled at top, then convex, 
concave and spinose below, outer surface longitudinally carinate, the carina 
in peraeopods 3 and 4 armed with 2 or 3 spines and produced below. Uropod 3, 
outer ramus scarcely longer than the inner, with plumose setae only on 


inner margin, the inner ramus having them on both margins. Telson divided. 


Colour greenish to yellowish, with golden yellow tips to carinae and teeth. 
L. 12 mm. 


Lake Baikal. On or near Spongia baicalensis. 


Gammari nominatim, reapse incertae sedis. 


Gammarus caudisetus Viv. 1805 @.c., Viviani, Phosphor. Maris, p.7 t.1 
£.3,4 | 1888 @. c., ?.Hyperia medusarum, T. Stebbing in: Rep. Voy. Challenger, v.29 
p- 76, 78 | 1893 @.? c., A. Della Valle in: F. Fl. Neapel, ©. 20 p.766 | 1872 Hyperia c., 
A. Boeck, Skand. Arkt. Amphip., v.1 p.39. 


Genoa harbour. 


G. chilensis Nie. 1849 @. c., H. Nicolet in: Gay, Hist. Chile, v.3 p. 239, 

. Body smooth, without spines or tubereles. Eyes round, very small. Antenna 1 
very slender, much longer than antenna 2, 1st joint stout, eylindric. Antenna 2 con- 
siderably stouter, pedunele very long, hirsute, flagellum short. Gnathopods 1 and 2 
subequal, 6th joint little dilated, suboval. Peraeopods 4 and 5 very long, 
spinulose. L. 8 mm. 


Sea of Chili. 
G. cireinnatus Viv. 1805 @. ce., Viviani, Phosphor. Maris, p.9 t.2 f. 9, 10 | 1888 


@. c., Amphithoe? c., T. Stebbing in: Rep. Voy. Challenger, v.29 p.76, 78 | 1893 Elas- 


mopus? c., A. Della Valle in: F. Fl. Neapel, v.20 p. 766. 


Body subeylindrieal. Pleon segments 1—3, postero-lateral corners angular. 
“Antenna 1 short, much longer than antenna 2, 2d joint in figure much shorter than 1st, 
Limbs all slender. Uropod 3 slightly suggestive of Ampithoe (p. 631). Colour yellowish 
to faint reddish. 


Genoa harbour. 


G. crassimanus Viv. 1805 @. c., Viviani, Ehosphor. Maris, p.10 t.2 f.7,8 | 1872 
@.?c., A. Boeck, Skand. Arkt. Amphip., v.1 p.39 | 1888 @. c., T. Stebbing in: Rep. 
Voy. Challenger, v.29 p.77 |1893 @.c., A. Della Valle in: F. FI. Neapel, v.20 p. 726 | 
1862 Moera truncatipes (part.)?, Bate, ‚Cat. Amphip. Brit. Mus., p. 189. 

Antenna 1, 2d joint longer and thinner than 1st. Antenna 2 only half as long. 
Eyes rather broad, black. Front feet with granular chela. 


Genoa harbour. 


G. dubius Johnst. 1827 @.d., G. Johnston in: Zool. J., v.3 p.178 | 1888 @.d., 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.131 | 1893 @. d., Amphithoe (part.)?, 
A. Della Valle in: F. Fl. Neapel, v.20 p. 766. 


Eyes roundish, black. Antennae 1 and 2 slender, nearly equal, about half as 
long as body. Antenna 1, 1st joint longer than 2d. Gnathopods 1 and 2 like those 
of Ampithoe rubricata (p. 639), but rather smaller, 6th joint oblong, not much dilated. 
Anterior legs short, hinder long. Uropods 1—3 long. Telson divided. L. 4—6 mm. 


North-Sea (Berwick). Rock pools among Confervae. 


e 


Gammaridarum species incertae sedis 518 


G. flabellifer Stimps. 1855 @.f., Stimpson in: P. Ace. Philad., v.7 p.382 | 
1862 @.f., Bate, Cat. Amphip. Brit. Mus., p. 222 | 1893 @. locusta (part.)?, A. Della 
Valle in: F. Fl. Neapel, v.20 p. 766. 


Slender, smooth posteriorly. Eyes small, round, black. Antenna 1 half as long 
as body, flagellum 20-jointed, accessory flagellum 5-jointed. Gnathopods 1 and 2, 
6th joint oblong elliptie, with a fusiform area below surrounded by short setae. Uropod 3, 

' rami long, lamelliform, elliptical, equal, spreading like a fan. L. 12 mm. 


North-Paeifie (Loo Choo Islands). 


G. fontinalis A. Costa 1883 @.f., A. Costa in: Atti Ace. Napoli, ser.2 v.1 
nr.2 p.82, 106 | 1884 @. f., A. Costa in: Bull. Soe. ent. Ital., v.15 p. 340 | 1893 @. f., 
A. Della Valle in: F. Fl. Neapel, v.20 p. 766. 


Very near to Carinogammarus roeselii (p.506); differs by want of the dorsal 
spines of the pleon segments 4—6, these only on the posterior margin presenting a 
few backward directed apinnlen, 


Sardinia. In a spring. 


G. minus Say 1818 @. m., Say in: J. Ac. Philad., v. in p.375 | 1840 @. fasciatus 
(part.)?, @. minimus (laps.), H. Milne Edwards, Hist. nat. Crust., v.3 p. 46. 


United States of America. In brooks under stones. 


G. peloponnesius Guer. 1832 & 35 @.p., @. peloponnesiacus, Guerin(-Möne- 
ville) in: Exp. Moree, v.31 sect.2 p.45; Atlas p.8 Zool. t.27 f.5 | 1888 @. peloponnesius, 
T. Stebbing in: Rep. Voy. Challenger, v. 29 p.147 | 1893 @. locusta (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p. 760. 


Pleon segment 5 with stiff dorsal shliniesi Eyes reniform. Antenna 1 shorter 
than antenna 2, the latter with calceoli. Gnathopods 1 and 2 subequal, subchelate. 
Peraeopods 1—5 rather long, equal. L. 13—16 mm. 


Greece. 


G. podurus Abildg. 1789 @. p., Abildgaard in: O.F. Müller, Zool. Dan., ed. 3 
v.3 p.59 t.116 f. 1—6 | 1872 @.p., A. Boeck, Skand. Arkt. Amphip., v.1 p.38 | 1793 
Cancer (Gammarellus) p., J. F.W. Herbst, Naturg. Krabben Krebse, v.2 p.119 t. 35 
f.6 | 1830 Amphithoe podura, H.-Milne Edwards in: Ann. Sei. nat., v.20 p.376 | 1862 
Pherusa p., Bate, Cat. Amphip. Brit. Mus., p.145 | 1893 Gammarus locusta (part. ), A 
Della Valle in: F. Fl. Neapel, v.20 p. 759. 


Pleon segments 4 and 5 with dorsal spinules.. Antenna 1 apparently shorter 
than antenna 2, with no accessory flagellum (in figure). Gnathopods 1 and 2, 6th joint 
oval, not very large. 


Oeresund. 


'G. savii M.-E. 1830 @. s., H. Milne Edwards in: Ann. Sei. nat., v.20 p.369 | 
1862 Moera s., Bate, Cat. Amphip. Brit. Mus., p.191 | 1895 Maera? s., A. Della Valle 
in: F. Fl. Neapel, v.20 p.731. 


Not a species of Gammarus. Pleon segment 4 dorsally produced to an acute 
tooth, the other pleon segments perfeetiy smooth. Pedünele of antenna 2 reaching 
much beyond that of antenna 1. Gnathopod 1 very small. Gnathopod 2 much larger, 
but still small, much as in G. loeusta (p. 476). Uropods 1—3 reaching equally far back. 
Uropod 3 very short, rami very small, stiliform. Telson a little horizontal plate. 


North-Atlantie (coasts of la Vendöe [France)). 
G.sp., Viv. 1805 @. longicornis (non J. ©. Fabrieius 1779!), Viviani, Phosphor. 
Maris, p.8 t.2 f.3,4 | 1888 @. 1., T. Stebbing in: Rep. Voy. Challenger, 0.29 p.76 f. | 
1893» Dexamine gibbosa (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 578. 
Antennae 1 and 2 very long and slender, each with 2 long joints in peduncle. 
% Antenna 1 the longer. Uropods 1—3, rami laminar, elliptic. Colour yellowish. 
# : Genoa. In weedy bays. 
Das Tierreich, 21. Lief.: T. R. R. Stebbing, Amphipoda 1. 33 


ı 

1%) 
= 

5 

. 
EG 
x 
ur 

= 


514 Gammaridarum species incertae sedis, Dexaminidae, Dexamine 


G.sp., Risso 1826 G. marinus (non Leach 1815!), A. Risso, Hist. nat. Eur. 
merid., v.5 p.96 | 1888 @. m., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 128. 


Colour intense grey, with deep grey dots, antennae and legs paler. 
Mediterranean. 


3l. Fam. Dexaminidae 


1813/14 Dexameridae, Leach in: Edinb. Ene., ©. 7 p.432 | 1876 Subfam. Dex- 
aminae, A. Boeck, Skand. Arkt. Amphip., v.2 p.810 | 1888 Dexaminidae, T. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 573, 900 | 1893 Dexaminidi (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 556. 


Pleon segments 5 and 6 coalesced. Antenna 1 with long 24 joint, 
without accessory flagellum. Upper lip rounded. Lower lip varying. Mandible 
(Fig. 90 p. 520) without palp. Maxilla 1 varying, inner plate with only 1 
or 2 setae or setules. Maxilla 2, inner plate the smaller, not fringed on 
inner margin. Maxillipeds (Fig. 92 p. 522), outer plates very long, palp 
rather short, finger small or wanting. Gnathopods 1 and 2 feeble, sub- 
chelate. Peraeopods 1—5, fingers of all commonly pointing backward. Uropod 3, 
rami subequal, extending beyond uropod 2. Telson elongate, deeply cleft. 


Marine. 


5 genera, 10 accepted species and 5 doubtful. 


Synopsis of genera: 


Maxillipeds, palp 3-jointed; lower lip with 


1 inner lobes rudimentary — 2, 
Maxillipeds (Fig. 92), palp 4-jointed; lower lip 
with inner lobes well developed — 8. 
Peraeopods 1—5, 4th joint shorter than ö5th 
0 and BR Some: 5 a 1. Gen. Dexamine. . . p.514 
Peraeopods 1—5, 4th joint longer than 5th 
and DR onnbaad N 7, a 2. Gen. Tritaeta.. : . p.517 
3 ! Maxzilla 1, palp 1-jointed ......... 3. Gen. Paradexamine . p.518 
Maxilla 1, palp 2-jointed — 4, 
Maxilla 1, 2d joint of palp large; maxillipeds, 
A inner plates well developed .. .... . 4. Gen. Polycheria . . p.519 
Maxilla 1, 24 joint of palp small; maxillipeds 
(Fig. 92), inner plates rudimentary.. . . . 5. Gen. Guernea. . . . p.521 


1. Gen. Dexamine Leach 


1813/14 Dexamine (Sp. un.: D.spinosa), Leach in: Edinb. Ene., v7 p.482 | 
1888 D., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 945 | 1893 D.(part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p.572 | 1894 D., G. O.Sars, Crust. Norway, v.1 p.473 | 
1846 Dexamene, L. Agassiz, Nomenel. zool., Index p. 121 | 1851 Amphithonotus (part.), 
(A. Costa in:) F. W. Hope, Cat. Crost. Ital., p.45 | 1861 Amphitonotus, E. Grube, Ausfl. 
Triest, p. 136. 


Body rather stout in Q ; some segments with dorsal projections. Head, 
rostral projection very small, post-antennal corners obsolete. Side-plates of 
moderate size. Antenna 1 with long peduncle, in © longer than antenna 2. 


R 
2: 


N 


Dexamine 515 


Lower lip with rudimentary inner lobes. Mandible, spine-row very small. 
Maxilla 1, inner plate with 1 seta, outer with 11 spines, palp’s single joint 
rather large, apically smooth on one maxilla, denticulate on the other. Maxilla 2 
rather small, armed only at the apices. Maxillipeds, inner plates rather small 
but well developed, outer plates almost covering the slender 3-jointed palp, 
fringed with spine-teeth on inner margin. Gnathopod 2 rather longer than 1°. 
Peraeopods 3—5, 24 joint successively less expanded. Uropod 3, rami narrowly 
lanceolate. 


4 species accepted, 4 doubtful. 


Synopsis of accepted species: 


1 Pleon segment 3 dorsally unidentate — 2. H 
Pleon segment 3 dorsally tridentate — 3. 


0 Peraeopod 5, 24 joint laminar . . ..... 1. D.spinosa . ... . p. 515 
Peraeopod 5, 2d joint sublinear. .. . . . . 2 DB; ?2.3 0 p. 516 
3 ! Pleon segment 2 triearinate . . ».»..... 3. D. spiniventris . . . p.516 
Pleon segment 2 not triearinate ..... . 4. D. blossevilliana . . p.517 


1. D. spinosa (Mont.) 1813 Cancer (Gammarus) spinosus, Montagu in: Tr. 
Linn. Soe. London, v.11 p.3 t.2 f.1 | 1818 @.s., Lamarck, Hist. An. s. Vert., v.5 
p.181 | 1813/14 Dexamine spinosa, Leach in: Edinb. Ene., 0.7 p.432 | 1862 D. s., 
Bate & Westwood, Brit. sess. Crust., v. 1 p.237 f. | 1862 D. s., Bate, Cat. Amphip. 
Brit. Mus., p.180 t.24 f.1 | 1876 D.s., A. Boeck, Skand. Arkt. Amphip., v.2 p.312 
t.11 £.5 | 1893 D. s. (part.), A. Della Valle in: F. Fl. Neapel, ».20 p.573 t.5, 12; t.18 
f£.1—17, 19 | 1893 & 94 D. s., G. O. Sars, Crust. Norway, v.1 t.166 £.2; t.167; p.475 | 
1840 Acanthonotus? s., H. Milne Edwards, Hist. nat. Crust., v.3 p.25 | 1855 Amphithoe s., 
Gosse, Man. mar. Zool., v.1 p.141 f.266 | ?1826 Atylus corallinus, A. Risso, Hist. nat. 
Eur. merid., v.5 p.99 | 1830 Amphithoe marionis, H. Milne Edwards in: Ann. Sci. 
nat., v. 20 p.375 | 1857 Amphithonotus m., A. Costa in: Mem. Acc. Napoli, v.1 p.195 | 
1843 Amphitho& tenuicornis, H. Rathke in: N. Acta Ac. Leop., 0.201 p.77 t.4 f.3| 
1859 Gammarus speciosus (laps., corr.: @. spinosus) + Dexamine t., R.M. Bruzelius in: 
Svenska Ak. Handl., n. ser. ©.3 nr.1 p.79 | 1851 Amphithonotus acanthophthalmus, 
(A. Costa in:) F.W. Hope, Cat. Crost. Ital., p.45 | 1868 Dexamine spiniventris var. pontica, 
Özerniavski in: Syezda Russ. Est., Syezda 1 Zool. p.111 t.8 f.16 | 1898 D. spinosa 
var.?, Sowinski in: Möm. Soc. Kiew, v.15 p.490 t.12 £.5, 6. : 


Peraeon robust, pleon carinate, segments 1—4 each produced to a 
strong dorsal tooth, hinder part of segments 5 and 6 with 3 small dorsal 
ridges each ending in a small tooth. Head, rostrum short, blunt at apex, 
lateral corners triangular, acute. Side-plate 1 a little concave in front, 
4! deeper than the rest. Pleon segment 3, postero-lateral corners sharply 
produced. Eyes oblong reniform, larger in S than in Q, dark brown with 
whitish coating. Antenna 1, 1° joint produced to an obtuse tooth (or acute, 
Sowinski), 2% much narrower and over once and a half as long, 34 very 
short (or not very short, Sowinski), flagellum about twice as long as peduncle, 
30—45-jointed. Antenna 2 in © shorter, in JS longer than antenna 1, 
ultimate joint of peduncle longer than penultimate, flagellum filiform. 
Gnathopod 1, 24 joint eurved, 5th shorter than 6'%, widened distally, 6! expanding 
to the palm which is oblique, as long as hind margin, well defined by the 
palmar spines at the obtuse angled junction. Gnathopod 2, 24 joint longer, 
curved, 5tk Jittle widened distally, as long as 6%, which is similar to that 
of gnathopod 1 but longer. Peraeopods 1 and 2 alike, 6! joint longer 
than 5tk, finger rather strong. Peraeopods 3—5, 6" joint shorter than 5th, 
Peraeopod 3, 24 joint oblong oval, lower hind corner produced in a rounded 


33% 


516 Dexamine 


lobe, 4" joint subfusiform, much broader and longer than 5tt. Peraeopod 4, 
24 joint piriform, abruptly narrowed below, 4 as long as 5th. Peraeopod 5 
rather shorter, 29 joint oval, narrowest below, 4" shorter than 5". Branchial 
vesicles pleated. Uropod 3, rami about twice as long as peduncle Telson 
thrice as long as broad, cleft to ®/, length, each half with 3 lateral spines 
and 1 on obtuse apex. Colour a mixture of chestnut-brown, pink, light yellow 
and pure white (Sars), sometimes brilliant with mingled green and red. 
L. 9 reaching 14 mm, © rather smaller. 

Aretie Ocean, North-Atlantie with adjoining seas (Europe from Vadsö to the 
Black Sea; Azores). Within tide-marks to 75 m. 


2. D. thea Boeck 1861 D.t., A. Boeck in: Forh. Skand. Naturf., Mode 8 p. 658 | 
1876 D.t., A. Boeck, Skand. Arkt. Amphip., v.2 p.315 t.12 f.1 | 1885 D.t., J.S. 
Schneider in: Norske Selsk. Skr., 1884 p.20 t.2 | 1898 D.t., D. spinosa (part.)?, A 
Della Valle in: F. Fl. Neapel, v.20 p.579 | 1893 & 94 D.t., G. O. Sars, Crust. Norway, 
v.1 1.168 f.1; p.477 | 1862 D. tenuicornis (err., non Amphithoe t. H. Rathke 1843!), 
Bate & Westwood, Brit. sess. Crust., v.1 p.240 f. | 1871 .D. heibergi, A. Boeck in: Forh. 
Selsk. Christian., 1870 p.187 | 1876 D. h., A. Boeck, Skand. Arkt. Amphip., p. 316 
t.12 £.3. 


Peraeon, pleon and head nearly as iD. spinosa (p.515), Bi eyes smaller, 
oval. Antenna 1, 1° joint not apically produced, 34 joint not extremely short, 
flagellum 16-jointed. Antenna 2 in 9 much shorter, ultimate joint of peduncle 
subequal to penultimate (Sars) or shorter than it (Schneider), flagellum little 
longer than pedunele, 11-jointed. Gnathopods 1 and 2 and peraeopods 1 and 2 
nearly as in D. spinosa. Peraeopod 3, 24 joint with hinder margin and lower 
lobe subangular, 4! much longer and broader than 5tk, 5th sliehtly shorter than 
6, Peraeopod 4, 24 joint little longer than broad, very convex behind, and 
finely serrate, 4tk longer than 5th, 5tk than 6th, Peraeopod 5, 24 joint almost 
linear, 5th Jonger than 4% or 6th, finger strong in this and the other peraeopods. 
Branchial vesieles simple. Uropod 3, rami twice as long as peduncle, rather 
narrow. Telson not quite thrice as long as broad, celeft nearly to the base, 
spines as in D. spinosa, with addition of 2 subdorsal pairs. Colour yellowish, 
semipellucid, mottled with brown and pink. L. 4—6 mm. 

Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (from Vadsö to Christiania- 
fjord; north of Great Britain; France); Kattegat. Depth to 113 m. 


3. D. spiniventris (A. Costa) 1853 Amphithonotus s., A. Costa in: Rend. Soc. 
Borbon., n. ser. v.2 p.173 | 1857 A.s., A. Costa in: Mem. Ace. Napoli, v.1 p. 186 t.2 
f.1 | 1864 Dexamine s., E. Grube in: Arch. Naturg., 0.301 p.195 | 1866 D.s., Cam. 
Heller in: Denk. Ak. Wien, ©.2611 p.80 | 1893 D. spinosa (part.), A. Della Valle in: 

F. Fl. Neapel, v.20 p. 573 t.5 £.9; 1.18 £. 18. 


Pleon moderately robust, pleon segments 1—4 and 6 carinate, each 
produced to a dorsal tooth, in segment 4 and sometimes in 3 preceded by 
a smaller tooth, segments 1—3 and 6 having a pair of latero-dorsal ridges 
ending in small teeth, sometimes obsolete on segment 1, the part ofthe coalesced 
segment corresponding to segment 5 separated as usual from segment 6 by 
a depression. Head, rostrum very short, lateral corners angular. Pleon 
segment 3, postero-lateral corners sharply produced. Eyes reniform, not very 
large. Antenna 1, 1° joint produced to a sharp tooth, 24 less than double 
as long as 1° (Della Valle; Heller: thrice), flagellum 40—50-jointed. Antenna 2 
shorter (at least in ©), ultimate joint of pedunele longer than penultimate, 
flagellum about 40-jointed. Gnathopods 1 and 2 and peraeopods 1—5, uropods 
and telson much as in D. spinosa (p. 515). Colour dull yellow. L. 7-8 mm. 


Mediterranean. 


T a a ee re 


k 
b 
! 


EN Da EN 
7 a 1 Des E ” 4 


Dexamine, Tritaeta 517 


4. D. blossevilliana Bate 1862 D.b., Bate, Cat. Amphip. Brit. Mus., p. 131 


bu24f. 2 | 1893 D. spinosa (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 573. 


Very near to D. spinosa (p. 515), but distinguished as follows. Pleon 
segment 3 with a strong dorsal tooth on each side of the central one; 
segment 4 (in figure) with a small dorsal tooth in front of its apical one. 
Eyes very large, quadrate. Telson very long, eleft nearly to the base, each 
external margin carrying 4 fasciculi of hairs, each apex serrated and carrying 
a subapical spine. L. 10 mm. 


Habitat unknown. 


D. anisopus (Grube) 1861 Amphithöe (Amphitonotus) a., E. Grube, Ausfl. Triest, 
p-136 | 1864 Dexamine a., E. Grube in: Arch. Naturg., v.30ı p.197 | 1893 D. spinosa 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 573. 


Probably identical with D. spiniventris; but peraeopods 1 and 2 not ymmetrical. 
L. over 6 mm. 


Adriatie. 


D.leptonyx (Grube) 1861 Amphithöe (Amphitonotus) l., E. Grube, Ausfl. Triest, 
p- 136 | 1864 Dexamine l., E. Grube in: Arch. Naturg., v. 301 p.198 | 1893 Atylus? l., 
A. Della Valle in: F. Fl. Neapel, v.20 p. 703. 


Probably identical with D. spinosa (p.515); but 1st joint of antenna 1 is said 
to be unarmed. L. 8 mm. 


Adriatic. 


D. miersii Hasw. 1885 D.m., Haswell in: P. Linn. Soe. N. S. Wales, v.10 
p- 102 t.13 f.8—12 | 1893 D. m., A. Della Valle in: F. Fl. Neapel, v.20 p. 578. 


Torres Strait (Thursday Island). 


D. scitulus Harford 1877 D.s., Harford in: P. Calif. Ac., v.7 p.116 | 1893 
D.s., A. Della Valle in: F. Fl. Neapel, v.20 p. 579. 


Magdalena Bay [Lower California]. Depth 11 m. 


2. Gen. Tritaeta Boeck 


1871 Lampra (Sp. un.: L. gibbosa) (non Jaec. Hübner 1816, Lepidoptera!), A. 
Boeck in: Forh. Selsk. Christian., 1870 p.188 | 1876 Tritaeta, A. Boeck, Skand. Arkt. 
Amphip., v.2 p.817 | 1888 T'. (part.), T. Stebbing in: Rep. Voy. Challenger, v.29 p. 941 | 
1894 & 95 T., G. O. Sars, Crust. Norway, v.1 p. 478, 698. 


Body rather stout in Q, only pleon segment 4 dorsally produced. 
Head, rostrum almost obsolete. Side-plates shallow, some of irregular angular 
form. Antennae 1 and 2 subequal; antenna 1 with long pedunele. Mouth- 
parts and gnathopods 1 and 2 nearly as in Dexamine (p. 514), Peraeopods 
1—5 strong, subequal, 4 joint very long, 5tk and 6tk short, the spiniferous 
widening of the 5% joint giving all a subchelate character. Peraeopods 3—5, 
24 joint not much expanded, least in peraeopod 5. Uropods as in Dexamine. 


l species. 


1. T. gibbosa (Bate) ?1861 Amphithöe brevitarsis, E. Grube, Ausfl. Triest, 
p. 185 | 1864 Dexamine b., E. Grube in: Arch. Naturg., v. 301 p. 196 ! 1862 Atylus 
gibbosus, Bate (& Westwood), Brit. sess. Crust., v.1 p.248 f. | 1862 A.g., Bate, Cat. 
Amphip. Brit. Mus., p. 137 t.26 f.3 | 1871 Lampra gibbosa, A. Boeck in: Forh. Selsk. 
Christian., 1870 p.188 | 1876 Tritaeta g., A. Boeck, Skand. Arkt. Amphip., 0.2 p.318 
t.12 f.2 | 1890 T.g., A. O. Walker in: P. Liverp. biol, Soe., v.4 p.249 t.16 f.4,6| 


518 Tritaeta, Paradexamine 


1893, 94 & 95 T. g., G. O. Sars, Crust. Norway, v.1 t.168 f.2; p.479; p.698t.vuıf.1| 


1895 T. g., A.O. Walker in: P. Liverp. biol. Soe., v.9 p. 306 | 1881 Dexamine dolichonyx, 


Nebeski in: Arb. Inst. Wien, ©.3 p.145 t.13 f.40 | 1888 Tritaeta d., T. Stebbing i in: Rep. 
Voy. Challenger, v.29 p. 520, 941, 945. 


Pleon segments 1—3 in J slightly raised dorsally. Side-plates 1 and 2 
subquadrate, 3% and 4" acutely produced at the lower corners, 5% with front 
lobe the deeper, rounded. Pleon segment 3, postero-lateral corners acute, 
not greatly produced. Eyes large, rounded oval, larger in d, reddish brown 
with whitish coating. Antenna 1 long, 1° joint much shorter than 24, 
flagellum twice as long as peduncle, about 18-jointed. Antenna 2 in © 
scarcely so long, ultimate joint of peduncle shorter than penultimate, flagellum 
about 18-jointed; in S longer than antenna 1, penultimate and antepenultimate 
joints of pedunele densely fringed above, flagellum about 24-jointed. Gnatho- 
pod 1, 5th joint distally widened, rather shorter than 6%, which is a short 
oval, widening to the palm; palm slightly oblique, fairly well defined. Gnatho- 
pod 2 longer, 5{R joint slender, little widened distally, quite as long as 6th, 
which is longer and more slender than in gnathopod 1. Gnathopod 1 often 
has a deep sinus in the front margin of the 6! joint in J and at least 
occasionally also in O, perhaps a copulatory feature. Peraeopods 1—5, 
4th joint longer than 5tk and 6!" combined, 5tt armed with 5 strong spines 
on expanded extremity; 6® rather longer in peraeopods 1 and 2, equal or 
shorter in 3d—5%, in all faeing backward, not expanded distally; finger strong 
and curved. Peraeopod 3, 24 joint narrowly oblong oval, in peraeopod 4 
narrower, with angular projection proximally, in peraeopod 5 sublinear, slightly 
widened proximally. Branchial vesicles simple in ©, pleated in 9. Uropod 3, 
rami scarcely twice as long as peduncle, narrowly lanceolate, spinose. Telson 
rather over twice as long as broad, cleft nearly to base, in © with 3 marginal 
and 3 submarginal spines on each side, and 1 spine on each obtuse apex, 
in d with an additional marginal spine (Sars). Colour dark brownish with 
opaque white patches. L. 6 mm. 


North-Atlantie and North-Sea (Norway, France, British Isles, Azores); Mediterranean. 


3. Gen. Paradexamine Stebb. 


1899 Paradexamine (Sp. typ.: Dexamine pacifica), T. Stebbing in: Ann. nat. Hist., 
ser.7 v.4 p.210. 


In general character like Dexamine (p. 514), but distinguished as follows. 
Lower lip with inner lobes well developed and mandibular processes upturned. 
Maxilla 1 with the 1-jointed palp uniform in left and right maxilla. Maxillipeds 
with small distinet finger to the palp. 


1 species. 


1. P. pacifica (G. M. Thoms.) 1879 Dexamine p., &. M. Thomson in: Tr.N. 
Zealand Inst., v.11 p.238 t.10» f.4 | 1886 D.p., G. M. Thomson & Chilton in: Tr. 
N. Zealand Inst., v. 18 p. 149 | 1899 D.p., Paradexamine sp. typ., T. Stebbing in: Ann. 
nat. Hist., ser.7 v.4 p.210 | 1893 .D. spinosa (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p. 574. 


Peraeon and pleon segment 1 dorsally rounded, pleon segments 2—4 
carinate, segment 1 sometimes produced to a dorsal tooth or 3 teeth, segments 2 
and 3 produced to 3 large dorsal teeth, largest in segment 3, segment 4 
produced into a large tooth slightly upturned at the acute apex, a dorsal 


ELIIRE IR . ” 


Paradexamine, Polycheria 519 


depression on 34, 4th and the coalesced segments, the latter carıying 1 or 
2 pairs of spines, and having the dorsal and lower apices acute on each side 
of base of telson. Head, rostrum small, acute, slightly depressed, lateral 
corners produced into a small acute point. Side-plates of moderate size. 
Pleon segments 2 and 3, postero-lateral corners acutely produced. Eyes 
reetangular oval, remaining dark in spirit. Antenna 1 long, 1% joint stout 
(Thomson: with a tooth at the end), 24 varying from little longer to nearly 
twice as long; flagellum with 40—50 joints, 1%? sometimes longer than 34 of 
pedunele. Antenna 2 about °/, length of antenna 1, slender, ultimate joint of 
peduncle about half as long as penultimate, flagellum with 25—30 joints, several 
rather long. Upper lip with 2 hairy lobes, which fold one on the other (at 
least when the lip is detached). Lower lip with principal lobes broad, the 
mandibular processes not as usual produced backward, but represented only 
by a small acute process direeted forward. Mandible, eutting edge with a 
straight piece ending in 3 teeth, accessory plate divided into many denticles, 
spine-row of 2 or 3 very small spines, molar with slender spines fringing 
one border of the right mandible, palp entirely wanting. Maxilla 1, inner 
plate with 1 or 2 setules, outer plate with 11 spines, palp with about a 
dozen flexible spines. Maxilla 2, inner plate shorter and narrower than outer, 
‚each with slender spines on oblique apex. Maxillipeds, inner plates of moderate 
size, with many slender spines but seemingly without the 3 stout spine-teeth 
commonly found on the apex, outer plates long, about reaching middle of 
palp’s 39 joint, with spine-teeth on inner margin and slender spines on outer. 
Gmathopods 1 and 2, 5t" joint longer than 6", 6th with row of spines along 
inner surface, widening a little to palm, which is oblique, microscopically 
pectinate, well defined by palmar spines, finger with subapieal tooth. Gnatho- 
pod 2 rather the longer. Peraeopods 1 and 2 slender, 5t" joint shorter than 4*h, 
Peraeopod 3, 24 joint broad oval, hind margin smooth, 4 joint longer and 
5th shorter than 6'", Peraeopod 4, 24 joint much narrowed below, 4" longer 
| than 5%, 5th Jonger than 6%, Peraeopod 5, 24 joint much smaller than 
in preceding peraeopods, narrowed below, 4% and 5!" joints subequal; finger 

curved, rather strong in all the peraeopods. Uropod 1 rather long, outer 
ramus little shorter than inner; uropod 2, outer ramus shorter than inner; 


uropod 3, rami short, subequal. Telson reaching beyond uropod 3, deeply 
eleft. L. reaching 8 mm. 
South-Pacifie (New Zealand; Jervis Bay [East-Australia]). 


4. Gen. Polycheria Hasw. 


1879 Polycheria, Haswell in: P. Linn. Soc. N. S. Wales, v.4 p.345 | 1893 P., 
A. Della Valle in: F. Fl. Neapel, v.20 p.579 | 1881 Polychiria, E. v. Martens in: Zool. 
Rec., v.16 Crust. p.31 | 1882 Polycheria, Polychelia, G. M. Thomson in: Tr. N. Zealand 
Inst., v.14 p.233 | 1898 Polycheria, Polycharia, Calmaı in: Ann. N. York Ac., v.11 
p. 261, 268, 288. 
% Agreeing with Tritaeta (p. 517), but distinguished as follows. Lower 
| . lip with well formed inner lobes. Maxilla 1 with 2-jointed palp. Maxilli- - 
peds having a small distinet finger to the palp. Peraeopods 1—5 (Fig. 91 
p. 520) having the 5'" joint linear and the 6!" expanded distally, to form a 
distinet concave palm. Telson with acute apices. 


2 species. 
Synopsis of species: 
Side-plate 4, front lobe subaeute . . . : . 2.2 2 2... 1. P. antarctica . p. 520 


Side-plate 4, front lobe short, blunt. ... 2... 2. P.tenuipes . .p.520 


520 3 Polycheria 


1. P. antarctiea (Stebb.) 1875 Dexamine a., T. Stebbing in: Ann. nat. Hist., 
ser. 4 v.15 p.184 t. 154 f.1 | 1878 Atylus antarcticus, T. Stebbing in: Ann. nat. Hist., 
ser.5 v.2 p.870 | 1893 Polycheria antarctica, A. Della Valle in: F. Fl. Neapel, v.20 p.580 
t.58 f. 83, 84 | 1888 Tritaeta a. + T. kergueleni, T. Stebbing in: Rep. Voy. Challenger, 
v.29 p. 941; p. 941 t. 83. 


Pleon segments carinate except front part of segment 1, 4!" produced 
to a dorsal tooth, 6 raised on each side of base of telson. Head, rostrum 


obsolete. Side-plates 1 and 2 rather produced and acute at lower front corner, 


34 and 4 with subacute lobe in front. Pleon segment 3, postero-lateral 
corner forming a short acute tooth, which is sometimes obsolete. Eyes large, 
rounded oval, and (Haswell) red. Antenna 1, 1° joint scarcely half as long 
as 24, 34 very short, flagellum rather longer than peduncle, with 20 joints, 
most with long sensory filaments. Antenna 2 in O equal to antenna 1; ultimate 
joint of peduncle rather shorter than 

penultimate, flagellum shorter than 

peduncle, 11-jointed. Upperlip broadly \\NI 
and smoothly rounded. Mandible % \yyH Ge 
(Fig. 90), spine-row with 3 spines on AN 
left, 2 on right mandible. Maxilla 1, N . 

inner plate with 2 setae, outer with 10 5 

spines, palp with slender spines on - \ 

apex, 1% joint very short, 24 very asjoint -------- “es 

long. Maxilla 2, a few setae on R 
inner margin of inner plate. Maxilli- 

peds, outer plates very large, reaching 4% joint --—— --- 
beyondmiddleof3djoint 
of palp, inner margin 


fringed with about 20 
small spine-teeth. Gna- 

thopod 1, 5% joint 
‚subfusiform,longerthan joint = 
the 6®h, 6th short oval, _/ 
palm not very oblique, 


\ N 


Fig. 90. N 
P. antaretica. finely pectinate, well Fig. 91. P. antarctica. 
"Left mandible. defined, 4th__6th j oints Peraeopod 1. 


with long spines-on hind margin, 6!" with them also on front. Gnathopod 2 
similar, but 24, 4th, 5 and 6% joints longer. Peraeopods 1—5 nearly alike; 
24 joint in peraeopods 1 (Fig. 91) and 2 broader, not longer than 4*, in 34 
to 5th a little widened proximally, and a little longer than 4b; in all peraeopods 
dh as long as 5i and 6!" combined, 6tk in peraeopods 1 and 2 rather longer 
than 5#", in all peraeopods 6% with inner margin produced into a tooth tipped 
with 2 spines, against which the much curved finger impinges. Branchial 
vesicles simple in ©, pleated in d. Uropod 3, outer ramus shorter than 
inner (Stebbing), or rami equal (Haswell). Telson elongate, cleft nearly 
to the base, with several marginal spines, apices tipped each with a spine. 
‘ Colour yellowish. L. 3—8 mm. 

Antaretie Ocean (lat. 770 80° S., depth 548 m, in sponge); South-Paeifie (Port 
Jackson [East-Australia], depth 4 m; Paterson Inlet [New Zealand]. depth 19 m); 
southern Indian Ocean (Kerguelen, depth 51 and 232 m). 

2. P. tenuipes Hasw. 1879 P.t. + ?P. brevicornis, Haswell in: P. Linn. Soc. 
N.S.Wales, v.4 p.845 t.22 f.8; p.346 | 1882 P. obtusa, G. M. Thomson in: Tr. N. 
Zealand Inst., u. 14 p.233 t.17 f.3 | 1898 P. osborni, Polycharia o., Calman in: Ann. 
N. York Ac., „11 p.268 t.32 f.2; p. 288. 


>; 


nk 3 Tara = 


Polycheria, Guernea 521 


Closely resembles P. antaretica, but differs in the following respects. 
Dorsal processes of pleon segments 4 and 6 much less prominent. Side- 
plate 4 with anterior process reduced to a short blunt lobe. Maxilla 1 with 
1° joint very short, 24 very long (1-jointed: Calman). Maxillipeds with outer 
plates longer, nearly equalling paip, and armed with only about 11 spine-teeth 
on inner margin. Gmathopod 1 with palmar edge very short, not more than 
!/, as long as finger; gnathopod 2 with 6% joint twice as long as broad, 
palmar edge about '/, as long as finger. Peraeopod 3 with front and hind 
margins of 6% joint nearly parallel, and thumb-like process much less 
prominent. L. © 7 mm. 


Puget Sound. 


5. Gen. Guernea Ühevreux 


1868 Helleria (Sp. un.: H. coalita) (non Ebner 1868, Isopoda!), A. M. Norman 
in: Ann. nat. Hist.. ser.4 v.2 p.418 | 1887 Guernea, Chevreux in: Bull. Soe. zool. France, 
v.12 p.302 | 1890 @., T. Stebbing in: Ann. nat. Hist., ser.6 v.5 p.192 | 1893 @., A. 
Della Valle in: F. Fl. Neapel, v.20 p. 570 | 1887 Prinassus (Sp. un.: P. nordenskiöldii), 
H. J. Hansen in: Vid. Meddel., ser. 4 v.9 p.82. 


Pleon segments 5 and 6 coalesced, abruptly truncated behind. Head, 
rostrum obsolete. Side-plate 5 the largest. Antenna 1 in d much shorter 
than antenna 2. Upper lip rounded. Lower lip with inner lobes well developed. 
Mandible, eutting edge obscurely dentate, with accessory plate but no apparent 
spine-row, molar represented by a laminar fold. Maxilla 1, inner plate with 
1 setule, outer with 7 spines, palp with 1° joint slightly longer than 24. 
Maxilla 2, inner plate with 2 (1?) setae, outer plate longer, with a few 
setae. Maxillipeds, inner plates rudimentary, outer plates reaching middle 
of 34 joint of palp, fringed with spine-teeth on distal part of inner margin, 
finger of palp small. Gnathopods 1 and 2, 6th joint subquadrate. Peraeo- 
pods 1 and 2, 4th joint much longer than 5th; 24 joint smaller in peraeo- 
pod 4 than in 3 or 5; peraeopod 5 with 4th and 5th joints wide and plumose. 
Uropod 3, rami lanceolate, not much longer than peduncle. Telson rather 
longer than broad. 


2 species accepted, 1 doubtful. 


Synopsis of accepted species: 
Gnathopod 1, 6th joint deeidedly longer than broad; 


peraeopod 5, 24 joint much narrowed distally. . . 1. @. coalita. ... . p: 521 
Gnathopod 1, 6th joint scarcely longer than broad; 
peraeopod 5, 24 joint little narrowed distally. . . 2. G. nordenskiöldii . p. 522 


1. G. coalita (Norm.) 1868 Helleria c., A. M. Norman in: Ann. nat. Hist., ser. 4 
v.2 p.418 t.22 f.8; t.23 f.1—6 | 1888 Guernea c., T. Stebbing in: Rep. Voy. Challenger, 
0.29 p.595, 596, 386 | 1895 @. e. (part.), Chevreux & E. L. Bouvier in: Ann. Sei. nat., 
ser. 7 v.15 p.123 | 1893 @. e. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.570 t. 31 
f.20—33; t.58 £.80 | 1887 @.c. + @.laevis, Chevreux in: Bull. Soc. zool. France, v.12 
p.803 £.1,2; p.328. ° 


Peraeon dorsally rounded, pleon somewhat compressed, with strongly 
marked dorsal division between segments 3 and 4, segments 5.and 6 completely 
fused, but with a dorsal depression between two humps which, like segment 4, 
are serrate; telson attached to the lower margin of the steeply truncate 
back of the compound segment. Head, lateral corners obtusely produced. 
Side-plates 1—4 not very large, successively larger, lower margin rounded, 
narrow, subserrate, 5tk large, the hind lobe deeper than side-plate 4; side-plate 7 


522 Guernea 


larger than 6tk, Pleon segment 3, postero-lateral corners rounded. Eyes 
round. Antenna 1 in ©, 1° joint stout, not much longer than 24, 
34 short, flagellum shorter than the short peduncle, 7-jointed, in S 1° joint 
of peduncle shorter than 24, flagellum rather longer than pedunele, about 
9-jointed. Antenna 2 in Q equal to antenna 1, ultimate joint of pedunele much 
narrower and shorter than penultimate, flagellum 8- or 9-jointed, m JS 
ultimate and penultimate joints of peduncle subequal, flagellum slender. 
Upper lip flatly rounded, smooth. Lower lip, prineipal lobes with an acute 
apex, inner lobes prominent, mandibular processes obsolete. Maxilla 2, inner 
plate with well rounded apex. Gnathopod 1, 24 joint very narrow and bent 
at the base, 5tR joint a little shorter than 6%, 6th decidedly longer than 
broad, widening a little distally, palm scarcely oblique, well defined, a little 
convex, finger shutting closely upon it. Gmathopod 2 similar, but base of 
24 joint little ‘bent, less narrow, 5% rather longer than 6t", 6th Jonger and 
less widened than in gnathopod 1. Peraeopods 1 and 2, 6tk joint narrower 
but longer than 5tk, Peraeopod 3, 24 joint greatly expanded below, bowed 
out in front, 4" rather dilated, following joints slender. Peraeopod 4, 2° joint 
much smaller, piriform, widest above, other joints nearly as in peraeopod 3. 
Peraeopod 5, 24 joint very large, straight in front, very convex behind, 
narrowed below, 4!" and 5th expanded, with setae on both margins, 6'h very 
slender. The hexagonal markings of the integument are very conspicuous 
on the expansion of 24 joint in peraeopods 3—5. Uropods 1 and 2 rather 
small, rami shorter than peduncle, inner ramus shorter than outer, each 
tipped with a spine. Uropod 3, rami equal, not long, but longer than peduncle, 
smooth in ©, with plumose setae in C. Telson ovate, cleft almost to the 
base. Colour yellow with red and greenish dots and bands. L. 1'25—2 mm. 

North-Atlantie and North-Sea (Shetland; Moray Firth; Firth of Clyde; Irish 
sea; Croisie; Saint-Jean-de-Luz); Mediterranean (Cannes; Naples). 


2. G. nordenskiöldii (H.“J. Hansen) 1887 Prinassus n., H. J. Hansen in: 
Vid. Meddel., ser.4 v.9 p.82 t.2 f.7; t.3 £.1 | 1890 Guernea coalita (part.)?, T. Stebbing 
in: Ann. nat. Hist., ser.6 v.5 p.193 | 1893 @. c. (part.), Chevreux & E. L. Bouvier in: Ann. 
Sei. nat., ser.7 v.15 p.123 | 1893 @..c. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.572. 

Like G. coalita (p. 521), but distinguished as follows. Pleon segments 4—6 
more strongly carinate, the compound. segment not dorsally depressed or 
serrate. Antenna 1, flagellum 6-jointed; antenna 2, 
flagellum 3-jointed. Gmathopod 1, 6! joint scarcely 
longer than broad, much widened to the rather oblique 
palm, 6! joint in gnathopod 2 rather longer but 
otherwise nearly as in gnathopod 1. Peraeopod 5 with 
24 joint narrower below than above, but still broadly 
rounded below. L. 3'3 mm. 

Davis Strait (Sukkertoppen, depth 113 m, and Christians- 
haab, depth 28—56 m [Greenland]). 


G. flindersi (Stebb.) 1888 Dexamine f., T. Stebbing 
in: Rep. Voy. Challenger, v.29 p.946 t.187c | 1893, A. Della 
Valle in: F. Fl. Neapel, v.20 p. 578. 


Fig. 92. 
G. Glädeset. Perhaps to be referred to an independent genus. 


Maxilliped. Maxillipeds (Fig. 92), inner plates rudimentary, outer very 

large, completely covering the 4-jointed palp, seemingly fused 

in the basal half, then armed each with 3 or 4 interlocking spine-teeth and finally 

serrate and armed with 5 long curved spines; finger of palp very small. L. very small. 
Flinders Passage [East-Australial. Depth 15 m. 


EEE OR REISE 


a EI 118 6 u Seren 


Talitridae 523 


32. Fam. Talitridae 


1813/14 Orchestidae, Leach in: Edinb. Ene., v.7 p.432 | 1853 O., J. D. Dana in: 
U. S. expl. Exp., v.1311 p. 826, 846 | 1857 Subfam. Talitrini, A. Costa in: Mem. Ace. 
Napoli, v.1 p.173 | 1862 Orchestidae, Bate, Cat. Amphip. Brit. Mus., p.4 | 1871 O., A. 
Boeck in: Forh. Selsk. Christian., 1870 p.91| 1888 O., T. Stebbing in: Rep.Voy. Challenger, 
v.29 p. 602 etc. | 1890 Orchestiidae, G. ©. Sars, Crust. Norway, v.1 p.21 | 1893 Orchestidi, 
A. Della Valle in: F. Fl. Neapel, v.20 p.489. 


Head without pronounced rostrum, mouth-parts strongly projecting below. 
Side-plates 2—4 rather large, 5!" bilobed (side-plates I—4 often with a 
small backward projeetion near the top of hind margin). Antenna 1 usually 
much shorter than antenna 2, without accessory flagellum. Antenna 2 having 
the basal joint eoalesced with the head. Upper lip large, distally rounded, 
median line usually prominent. Lower lip without inner lobes. Mandible 
without palp, otherwise normal. Maxilla 1, inner plate slender, tipped with 
2 plumose setae, outer plate with 9 apical spines, palp 1-jointed, small, 
from rudimentary to a length reaching base of spines of outer plate. Maxilla 2, 
both plates with apical fringe -of slender spines, which on the inner plate 
is bounded by a plumose seta on’ the inner margin. Gnathopod 2 in the C 
either feebly chelate or (more generally) strongly subchelate (Fig. 96, 97, 99 
p. 565, 580, 583), in the © either feebly chelate or subchelate. Uropod 3 
usually with a single ramus. Telson (Fig. 98, 100 p. 580, 583) usually short. 


Represented on almost all eoasts, chiefly between tide-marks or not far above 


.or below them, but sometimes reaching considerable heights inland; also found at 


sea, perhaps generally in connection with floating objects; of the fresh water forms 
some found down to considerable depths in lakes, others in streamlets up to very 
great heights. 


13 genera, 101 accepted species and 45 doubtful. 
Synopsis of genera: 


2. Gen. Talitroides . . p. 527 
Pleopod 3 not degraded — 2. 


1 
Maxillipeds, 4th joint of palp wanting or quite 

rudimentary — 3. 
Maxillipeds, 4th joint of palp distinet — 6. 
Gnathopod 1 simple in the d — 4. 
Gnathopod 1 subchelate in the d — 5. 
Gnathopod 2 feebly chelate inthegd . .. . 1. Gen. Talitrus . . . p.524 
Gnathopod 2 strongly subehelate in the d . . 3. Gen. Orchestoidea . p. 527 
Gnathopod 1 (Fig. 98) subehelate in the @ . . 4. Gen. Orchestia . . p.530 
Gnathopod 1 (Fig. 94) simple in theQ.. . . 5.-6Gen. Talorchestia . p. 543 


| 

| 

| 

5 

Uropod 3, 1-jointed — 7. 
| 

| 


2 


3 


4 


5 


{er} 


Uropod 3 (Fig. 98), not 1-jointed — 8. 

Telson partially eleft........ "u... 6. Gen.Ceina . . » . p.554 
Boananine: ar a an, ea 7. Gen. Chiltonia . . p.555 
Uropod 3 with two rami — 9. 

Uropod 3 (Fig. 98) with one ramus — 10. 


a re TFT 8. Gen. Parhyale. . . p.556 
Tolsber le... va... BEE SEE 9. Gen. Neobule . . . p.556 


Maxillipeds, 4th joint of palp not unguiform . 10. Gen. Parorchestia . p. 557 
Maxillipeds, 4th joint of palp unguiform — 11. 


7 


oo 


9 


10 


524 Talitridae, Talitrus 


the 4hinthd.....-.... 0... 11. Gen. Hyale... . p.559 
Gnathopod 2 (Fig. 97) having the 5th joint 
produced between the 4th joint and 6th in 


l Gnathopod 2 having the 5th joint masked by 
11 


thed — 2. 
19 Telson (Fig. 98) undivided . . .. 2.2... 12. Gen. Hyalella. . . p. 574 
Telson (Fig. 100) more or less divided. . . . 13. Gen. Allorchestes . p.581 


1. Gen. Talitrus Latr. 


1793 [Subgen.] Gammarellus (part.), J. F.W. Herbst, Naturg. Krabben Krebse, 
v.2 p.106 | 1802 Talitrus (part.), (Latreille in:) Bosc, Crust., v1 p.78; 0.2 p.148 | 
1802 & 03 T. (part.), Latreille, Hist. Crust. Ins., v.3 p.38; v.6 p.294 | 1888 T', T. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 1682 | 1890 T., G. O. Sars, Crust. Norway, v.1 p.22 | 
1891 T., T. Stebbing in: Ann. nat. Hist., ser.6 v.8 p. 324 | 1893 T., A. Della Valle in: 
F. Fl. Neapel, v.20 p.492 | 1835 Thalitrus, Guerin (-Möneville) in: Exp. Mor&e, Atlas 
p-3 | 1851 Subgen. Talitrorchestia (Sp. un.: Talitrus celoquetii), F. Brandt in: Bull. 
phys.-math. Ac. St.-Petersb., v.9 p. 137. 


Peraeon dorsally broad, pleon compressed. Side-plate 1 narrow, 5th 
broad and deep. Antenna 1 much shorter than peduncle of antenna 2. 
Antenna 2, basal joint or joints soldered to head, with no gland-cone, 
ultimate joint of pedunele the longest joint. Epistome forming an obtuse 
angle with upper lip. Upper lip distally rounded. Lower lip with tuft of 
setules at inner corner of prineipal lobes. Maxilla 1, palp minute, 2-jointed. 
Maxillipeds, palp rather short and broad, 4" joint wanting. Gnathopod 1 
stronger than gnathopod 2, simple, 5t" joint strong but linear. Gnathopod 2 
feeble and similar in both sexes, 5'" joint expanded proximally, 6tk produced 
beyond a minute chela-forming finger. Peraeopod 2 with short, notched 
finger. Peraeopods 4 and 5 with expansion only of 24 joint. Branchial 
vesicles twisted or bent. Marsupial plates small, lanceolate. Telson simple. 


4 species accepted, 2 doubtful. 


Synopsis of accepted species: 


1 ! Peraeopods 3 and 4, 2d joint narrowing distally . . 1. T. sylvaticus . p. 524 
Peraeopods 3 and 4, 2d joint regularly expanded — 2. 
Antenna 1 reaching much beyond the penultimate 

9 joint of peduncle of antenna 2 ........ 2. T. alluaudi . . p.525 
Antenna 1 not reaching much beyond penultimate 

joint of peduncle of antenna 2 — 3. 

3 | Antenna 2, peduncle stout .. . .». .- 2.22... 3. T. saltator . . p.525 

Antenna 2, petuncle slender . .. .». . 2 2.2.2... 4. T. gulliveri. . p. 526 


l. T.sylvaticus Hasw. 1879 T.s., Haswell in: P. Linn. Soe..N.S. Wales, v.4 
p-246 1.7 f£.1 | 1885 T. s. (T. affinis, laps. corr.: T. assimilis); Haswell in: P. Linn. 
Soc. N.S.Wales, v.10 p.95 10 £.1| 1893 7. s., G.M. Thomson in: P. R. Soc. Tasmania, 
1892 p.15 t.4 £.1—10 | 1893 T.s., A. Della Valle in: F. Fl. Neapel, v.20 p.512 | 1880 
T. assimilis, Haswell in: P. Linn. Soc. N.S.Wales, 0.5 p.97 t.5 f.1| 1898 Orchestia 
sylvicola (err., non J.D. Dana 1852!), G.M. Thomson in: Tr. N. Zealand Inst., v. 31 p. 203. 


Side-plate 5 much the broadest. Eyes small, round. Antenna 1, 1° joint 
compressed, 24 the longest, 39 very short, flagellum rather shorter than peduncle. 
Antenna 2 rather long, ultimate joint of pedunele nearly twice as long as 
penultimate, flagellum longer than peduncle. Maxillipeds, palp with rudiment 
of a blunt terminal joint (Thomson). Gmathopod 1, 6% joint slender, tapering, 
finger (in figure) very small. Gnathopod 2, 4tk joint obtusely prominent, 
more so in © than in 9, 5th and 6th joints considerably longer in Q than 


Erz. in 


Talitrus 525 


in d, apex of 6!" rather narrowly and shortly produced beyond the minute 
finger in both sexes. Peraeopods 1 and 2 subequal (Haswell; but in figure 
peraeopod 1 is considerably the larger). Peraeopod 3 much shorter than 
peraeopods 4 and 5; branchial vesicles much twisted. Peraeopods 3 and 4, 
24 joint piriform, with scarcely any free corner. Peraeopod 5, 24 joint nearly 
as broad as long. Pleopods 1 and 2 feebly developed, 3% wanting(?). Uropod 3 
very short, conical ramus ending in a single spine. Telson spinulose, very 
slightly emarginate at apex. Colour usually dark slate, oceasionally dull 

| yellow. L. 11 mm. 

E New South Wales (on moist ground in wood and serubs; at Rootyhill, over 50km from 


E coast); Tasmania (on Mount Koseiusko and to a height of 760 m on Mount Wellington). 
E 2. T. alluaudi Chevreux 1896 7. a., Cheyreux in: Feuille Natural., v.26 p.7 
£.1—4. 


Body little compressed. Side-plate 5 large, as deep as the preceding. 
Eyes rather large, round. Antenna 1 very long, reaching beyond middle 
of ultimate joint of pedunele of antenna 2, flagellum as long as peduncle, 
6-jointed. Antenna 2, antepenultimate joint of pedunele rather long, pen- 
ultimate joint ?/, as long as ultimate, flagellum shorter than pedunele, 9—11- 
jointed. Gnathopod 1 robust, 5t" joint distally widened, 6!" spinose, stout 
and short. Gmathopod 2, 5tk joint scarcely longer than 6%, which has the 
apex broadly rounded and considerably produced beyond the minute finger. 
Peraeopods 3 and 4, 24 joint narrowly oval. Peraeopods 4 and 5 short, 
robust. Peraeopod 5, 24 joint almost eireular. Uropods 1 and 2 normal. 
Uropod 3 extremely small, scarcely half as long as telson, peduncle with 
long apical spine, ramus minute, eonical, about half as long as peduncle. 
Telson large, quadrate, as broad as long, not emarginate, with 2 apical spines 
and 4 on each side L. Q 5—6, d 7 mm. 
Seychelles (in rotten trunks’ of cocoanut-trees and in the humus of forests); Paris 
(hot-houses of the Jardin des Plantes). 


3. T. saltator (Mont.) 1766 Oniscus locusta (err., non Cancer I. Linne 1758)), 
Pallas, Mise. zool., p.191 t.14 f.15 | ?1777 Cancer l., Pennant, Brit. Zool., ed.4 v.4 
p-21 | 1793 C. (Gammarellus) l., J. . W. Herbst, Naturg. Krabben Krebse, v.2 p.127 t.36 
f.1 | 1802 Gammarus 1., Talitrus (part.), Latreille, Hist. Crust. Ins., v.3 p.39 | 1888 
T. l., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1722 | 1890 7. I, G. ©. Sars, Crust. 
Norway, v.1 p.23 t.9 |'1893 7.1, A. Della Valle in: F. Fl. Neapel, v.20 p.492, 947 
t.57 £.52, 53 | 1808 Cancer (Gammarus) saltator, Montagu in: Tr. Linn. Soc. London, 

‚ %9 p.94 t.4 f.3 | 1830 Talitrus s., H. Milne Edwards in: Ann. Sei. nat., v.20 p. 364 | 
1813/14 T.littoralis, Leach in: Edinb. Ene., v.7 p.402 | 1832 & 35 T. platycheles, T. 

» platichelis, Guerin (-Meneville) in: Exp. Moree, v.31 sect.2 p.44; Atlas p.3 Zool. t. 27 
er i893 T. locusta forma mediterranea, Chevreux in: Bull. Soc. zool. France, 
v.18 p. 124. 

Body robust, in S rather elongate. Head, rostral point minute. Side- 
plate 1 triangular, 2?—4th quadrate, 5!" nearly as deep as 4, Pleon 
segment 3, postero-lateral corners quadrate. Eyes with dark pigment, irre- 
gularly rounded, often wider apart than their diameter. Antenna 1 about 
reaching end of penultimate joint of pedunele of antenna 2, 24 joint the 
longest, flagellum much shorter than peduncle, 7- or 8-jointed. Antenna 2 
much longer in 9 than in 9, ultimate joint of peduncle much longer than 
penultimate, narrowest at base, flagellum subequal to peduncle, with 25 joints 
in ©, 35 or more in Ö, short and stout, with short, stout, apical spines. 
Gmathopod 1 spinose, 24 joint channelled in front, 3X notched at top of front 
margin, 5tk long, stout, free part with margins parallel, 6th much shorter, 


N ANETTE 


ut 4 


526 Talitrus 


slightly tapering, finger short. Gnathopod 2, 24 joint membranaceous, narrowly 
oval, 34 longer than 4", 5th widest in proximal half of free part, then 
from an angle of the hind margin narrowing to apex, 6!" shorter than 5, 
front margin straight, apex narrowly rounded, produced beyond the minute, 
longitudinally placed finger. Peraeopod 1 considerably longer than peraeo- 
pods 2 or 3. Peraeopod 2, finger short, conspicuously notched. Peraeo- 
pod 3 short, stout. Peraeopods 4 and 5 rather elongate. Peraeopods 3—5, 
24 joint narrowest above, front margin very convex, hind expansion strongly 
developed below, the joint much smaller than the side-plate in peraeopod 3, 
but much larger in peraeopods 4 and 5. Pleopods 1—3 slender, rami 
about as long as peduncle. Uropods 1 and 2, both rami spinose on margin 
and apex. Uropod 3, ramus subequal to peduncle, with spinules on margin 
and slender spine at apex. Telson broader than long, apically rounded, 
with a few spinules. Colour like sand or a deal board, or different shades 
of horn in section. L. Q 15, d 16—25 mm. 


North-Atlantie and adjoining seas (European coast, at least from the south of 
Norway to Naples; Azores). 


a gulliveri Miers 1876 T. g., Miers in: Ann. nat. Hist., ser. 4 v.17 p. 406 | 


1879 T. g., Miers in: Phil. Tr., 0.168 p.495 | 1893 7.?g., A. Della Valle in: F. Fl. 
Neapel, v.20 p.511. 


Body slender, smooth. Head small, anterior margin straight. Pleon 
segments 2 and 3, postero-lateral angle somewhat prominent and acute, 
its hind margin straight. Eyes round, black. Antenna 1 about reaching 
end of penultimate joint of peduncle of antenna 2, 1° joint shorter than 
24 or 34, flagellum as long as peduncle, with 4 joints, last minute. Antenna 2, 
not as long as body, much shorter and more slender than in T. saltator (p. 525), 
penultimate joint of peduncle more than half as long as ultimate, flagellum 
rather longer than peduncle, 18-jointed. Gnathopods 1 and 2 small and 
weak. Gnathopod 1, 5th, 6 and 7tk joints short, subequal, not dilated. 
Gnathopod 2, palm slightly dilated and the finger quite rudimentary as in 
T. saltator. Peraeopods 4 and 5 considerably longer than the preceding 
peraeopods, 24 joint moderately developed. Uropods 1 and 2, rami subequal. 
Uropod 3 quite rudimentary. L. about 10 mm. 


None of the specimens had largely developed BB ChoNEHEN gnathopod 2, but, 
if all were 2, that would leave the genus indefinite. 


Island of Rodriguez. Under stones in damp places. 


T. cloquetii (Aud.) 1826 Orchestia c., Audouin in: Deser. Fgypte, v.lıv p.9; 
Crust. t. 11 f.9 | 1862 O. c., O. cloquettii, Bate, Cat. Amphip. Brit. Mus., p.22 t.4 f.] 
(a very inaccurate copy) | 1893 O.? cloquetü, A. Della Valle in: F. Fi. Neapel, v. 20 
p-509 | 1830 Talitrus e., H. Milne Edwards in: Ann. Sei. nat., v.20 p.864 | 1835 Thalitrus c., 
Guörin (-Möneville) in: Exp. Mor6e, Atlas p.3 Zool. t.27 f.4e | 1851 Talitrus e., Talitror- 
chestia, F. Brandt in: Bull. phys.-math. Ac. St.-Pötersb., v.9 p. 135, 137, 138. 


Savigny’s figure merely represents a misapprehension of T. saltator (p. 525) in 
regard to the gnathopod. 


Red Sea? (Egypt). 


T. fissispinosus (Kossm.) 1880 Orchestia fissispinosa, Kossmann, Reise Roth. 
Meer., v.21 Malacost. p. 129 t.13 £.1—5 | 1893 O.? f., A. Della Valle in: F. Fl. Neapel, 
v.20 p.509 | 1888 Talitrus fissispinosus, T. Stebbing in: Rep. Voy. Challenger, v.29 p.515. 

Probably young 2. L.5 mm. 


Red Sea. 


Men anumde du“ 400-2 im A de a Ba in 


Talitroides, Orchestoidea 527 


2. Gen. Talitroides Bonnier 
1898 Talitroides, (J. Bonnier in:) Willem in: Ann. Soe. ent. Belgique, v.42 p.208. 


Near to Talitrus (p. 524). Palp of maxilla 1 much reduced. Gnathopod 1 
simple. Gnathopod 2 alike in both sexes. Pleopods 1 and 2 with inner 
ramus rudimentary, reduced to a simple tubercle. Pleopod 3 consisting of 
a small process representing the peduncle without rami. Eggs very few 
and comparatively large, contained in a marsupium formed by very short 
lamellae attached to the peraeopods 1—3. 


1 species. 


1. T. bonnieri Stebb.') * 
With the characters of the genus. 


Origin unknown (found in a conservatory at Ghent). 


3. Gen. Orchestoidea Nic. 


1849 Orchestoidea (Sp. un.: O. tuberculata), H. Nicolet in: Gay, Hist. Chile, ©. 3 
p-229 | 1888 O., T. Stebbing in: Rep. Voy. Challenger, v.29 p.231 | 1891 O., T. Stebbing 
in: Ann. nat. Hist., ser.6 v.8 p.328 | 1898 O., Calman in: Ann. N. York Ae., v.11 p.265 | 
1850 Talitronus, J. D. Dana in: Amer. J. Sci., ser.2 0.9 p.295 | 1852 7. (Sp. un.: T. 
insculptus), J.D. Dana in: P. Amer. Ac., v.2 p.202 | 1851 Megalorchestes, Megalorchestia. 
F. Brandt in: Bull, phys.-math. Ac. St.-Pötersb., v.9 p. 142, 310. 


Like Talitrus (p. 524), except that gnathopod 2 in JS is powerfully 
subchelate instead of feebly chelate. 


5 species. 


Synopsis of species: 


N Body with teeth or tubereles — 2. 
Body smooth — 8, 
2 EP 1. O. tuberculata . . p. 527 
Body with dorsal teeth on pleen ....... 2. O. fischeri . . . p.528 
3 | Eyes well separated — 4. 
N ER Ua ER 5. O. brasiliensis . . p.529 
4 | Gnathopod 2 strongly subchelate; only & known 3. O. californiana. . p.528 
Gnathopod 2 feebly chelate; only 2 known. . . 4. O. pugettensis . . p.529 


1. O. tuberculata Nic. 1849 Talitrus chilensis (2) -+O.t., H. Nicolet in: Gay, 


 Hist. Chile, v.3 p.229; p.231 Crust. t.2 f.4 | 1852 Talitrus ornatus (2) + Talitromus 


insculptus, J. D. Dana in: P. Amer. Ae., v.2 p.201; p.202 | 1853 & 55 Orchestia (Talitrus) 
insculpta + O. tuberculata, J. D. Dana in: U. S. expl. Exp., v.13u p.855 t.57 f. la—m (S), 
n—r (2); p.1595 | 1893 O.t., A. Della Valle in: F. Fl. Neapel, v.20 p. 496 t.57 f. 55. 


In JS peraeon segments, side-plates, 24 joint of peraeopods 3—5 and 
sometimes pleon segments 1—3 sculptured or marked with transverse 
ridges and series of tubereles; in © the sculpturing is almost evanescent, 
chiefly observable as a few faint sulcations or rugosities on side-plates and 
24 joint of peraeopods 3—5. Side-plate 1 narrow, curved forward, 24—-5th broad, 
5th deeidedly less deep than 4. Eyes subrotund, large. Antenna 1 very 


2) Spec. nov. After Jules Bonnier. — Willem published Bonnier’s account and 


name of the genus, withgut describing or naming the species, for which the genus is ercated. 


528 Örchestoidea 


small, not reaching end of penultimate joint of antenna 2; joints of pedunele 
successively shorter, flagellum 5—7-jointed. Antenna 2 in J longer than 
half the body, powerful, penultimate joint of pedunele long and stout, 
ultimate still longer, variable; flagellum shorter than peduncle, many-jointed. 
Antenna 2 in Q much smaller than in C, flagellum subequal to peduncle, 
12—19-jointed. Gnathopod 1 in CS, 5tk joint mueh longer than 6", narrow- 
ing a little to distal end, 6t% linear, subeylindrical, without palm, finger 
small. Gnathopod 2 in J, 5tk joint very small, masked behind by 4fth, 
6th massive, palm spinulose, rather oblique, nearly straight, with an excavation 
near the middle, corresponding with a slight projeetion in the margin of 
the long curved finger. Gnathopod 1 in O, 5t® joint narrowly oval, 6! narrowing 
to the palm-less apex, finger small. Gmatltopod 2 in Q feeble, 6 joint 
elliptical, the chela-forming finger longitudinal, nearly reaching apex of 
6th joint. Peraeopod 1 decidediy longer than peraeopod 2, the latter with 
notched finger. Peraeopod 3 short, peraeopod 5 a little shorter than 
peraeopod 4, moderately stout. Uropods 1—3 very spinose; uropod 1, both 
rami armed with spines. Colour yellowish white, peduncle of antenna 2 
orange. L: 18—20 mm. 


South-Paeifie (near Valparaiso). Burrowing in the sand; @ under sea-weed thrown 
up by the tides. 


2. O. fischerii (M.-E.) ?1828 Orchestia f., H. Milne Edwards in: M&m. Soe. 
Hist. nat. Paris, «5 t.25 f. 14 | 1830 O. f., H. Milne Edwards in: Ann. Sei. nat., 
v.20 p. 861, 362 | 1840 O. f., H. Milne Edwards, Hist. nat. Crust., v.3 p.19 1.29 f.4 | 
1893 O.f., A. Della Valle in: F. Fl. Neapel, v.20 p. 497 t.57 £.56 | 1862 Orchestoidea f., 
Bate, Cat. Amphip. Brit. Mus., p.11 t.2 £.1. 


Body stout, pleon segments 2 and 3 each with 3 large vertical dorsal 
teeth, placed near together, one on each side of the median line, the 34 being 
by implication central, segments 4 and 5 scabrous above. Eyes large, round. 
Antenna 1 very short, stout, tapering. Antenna 2 nearly as long as peraeon. 
Maxillipeds, 1° and 24 joints of palp expanded. Gmathopod 1 in G small, 
not cheliferous, and ending in a small very narrow hand. Gnathopod 2 
in d, 6! joint powerful, with long oblique palm, having near the centre 
a prominent process, finger very large. Peraeopods 1—3 small. Peraeopod 4 
very large, 24 joint greatly developed, raised behind above its point of 
attachment and overlapping much of peraeopod 5 and the pleon, the other 
joints long but of the ordinary form. Peraeopod 5 much shorter, 24 joint as 
broad as long. (According to Bate the eyes are small, ultimate joint of 
peduncle of antenna 2 thricee as long as the short penultimate, pleon 
segments 1—3 each with 2 dorsal teeth, but he does not say that he has 
examined a specimen.) L. about 13 mm. 


Morea, bay of Calamati (Petalidi [Greece]). 


3. O. californiana (F. Brandt) 1851 Megalorchestes californianus (nom. nud.), 
Megalorchestia californiana, F. Brandt in: Bull. phys.-math. Ac. St.-Pötersb., v.9 p. 142, 
3ll t. | 1898 Orchestoidea californiana, Calman in: Ann. N. York Ac., v.11 p.265 
t.31 f.1 | 1853&55 Orchestia (Talitrus?) scabripes, J. D. Dana in: U. S. expl. Exp., 
v.1311 p. 860; t.57 f.4 | 1857 Megalorchestia s. + M. californiana, Stimpson in: Boston 
J. nat. Hist., ©. 6 p.516 | 1862 Orchestoidea s. + ©. c., Bate, Cat. Amphip. Brit. Mus., 
p.11t.1 f.3; p.14 | 1877 Megalorchestia franciscana, Lockington in: P. Calif. Ac., ©.7 
p. 47 | 1893 Orchestia gammarellus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.500, 508. 


Not improbably the d of O. pugettensis. Body smooth. Side-plates 


rather large, 5tk hardly shorter than 4! (Dana; in Brandt’s figure 


RREHHER — 


f 
| 
1 
| 
: 
| 
2 
’ 


Orchestoidea 529 


side-plate 5 is extremely wide (from front to back), whereas the basal 
joint of peraeopod 3, which is said to be extremely dilated, is in the figure 
not half as wide as the side-plate). Eyes large, a little reniform (Dana); 
of moderate size, suboval, slightly narrowed above, wide apart, black (Brandt). 
Antenna 1 about reaching middle of penultimate joint of peduncle of antenna 2, 
flagellum shorter than peduncle, 7- or 8-jointed. Antenna 2 much longer 
than body; ultimate joint of peduncle sometimes more than twice as long 
as penultimate, flagellum longerthan pedunele, 35—37 (Dana: 20—22)-jointed. 
Gnathopod 1, joints scabrous (Lockington), 5% with narrow triangular sub- 
apical process of hind margin, 6% much shorter than 5tk, narrow, without 
palm, finger short. Gnathopod 2, 5tk joint small, masked by 4h; 6th Jarge, 
suboval; palm scabrous, moderately oblique (Lockington: almost transverse), 
the centre of it forming a low oblong tooth or process; finger long and 
much eurved, its apex touching the usual groove in the hand. Peraeopods 4 
and 5 subequal, longer than the rest. Peraeopods 3—5, 24 joint well 
expanded; surface of peraeopods scattered over with minute spinules (not 
mentioned by Brandt). Uropod 1, outer ramus without marginal spines 
(Dana), equally spinulose with the inner one (Stimpson). Telson simple, 
cordiform, dorsally longitudinally impressed. L. 22—29 mm. 
North-Paeifie (North California), Among detritus at high-tide level. 


4. O. pugettensis (Dana) 1853 & 55 Orchestia (Talitrus) p-, J. D. Dana in: U. 
S. expl. Exp., v.13m p.859; t.57 f.3a—d | 1857 O. p., Stimpson in: Boston J. nat. 
Hist., v.6 p.516 | 1862 Orchestoidea p., Bate, Cat. Amphip. Brit. Mus., p.83 t.2 f.3 | 
1893 Orchestia gammarellus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.499. 

Probably the 9 of O. ealiforniana (p. 528). Back broad. Head almost 
completely truncate in front. Side-plates 2—4 square, much larger than 
1st, 5th broad, front lobe about as deep as preceding side-plates, 6!" strongly 
produced backward, lower margin ridged. Pleon segment 3, postero-lateral 
corners rather sharply quadrate. Eyes rudely subrotund, as far apart as 
their longest diameter. Antenna 1 very short, flagellum shorter than peduncle. 
Antenna 2, ultimate joint of peduncle nearly twice as long as penultimate, 
flagellum rather longer than peduncle, of 30 joints, broader than long, with 
short setules. Gmnathopod 1 spinose, 24 joint slightly eurved, channelled in 
front, 5tk Jong, widening to a subapical pellueid process, 6!" much shorter 
and narrower than 5t%, but moderately long, slightly curved, without palm 
but with a slight longitudinal pellucid swelling of hind margin, finger straight. 
Gnathopod 2, 24 joint very large, a long and broad oval, the membranous 
expansion fringed with spinules, 4% joint having at hinder apex a little 
triangular (seemingly 2-jointed, Dana) process, 5% a little longer than 6tk, 
with membranous bulging of free part, finger small, longitudinal, not reaching 
produced apex of 6tk joint; branchial vesicles small; marsupial plates short, 
narrow, with a few apical setae. Peraeopods 1 and-2, marsupial plates long, 
narrow, fringed with long setae. Peraeopod 2, finger abruptly narrowed 
midway. Peraeopods 3—5, 24 joint broadly expanded. Peraeopods 4 and 5 
long, not specially expanded below 24 joint. Uropod 1 long, peduncle and 
both rami very spinose (Dana: outer ramus naked). Uropod 3, ramus narrow, 
longer than peduncle. Telson about as long as broad. L. 16 mm. 

North-Paeifie (North California). 


5. O. brasiliensis (Dana) 1853 & 55 Orchestia (Talitrus) b., J. D. Dana in: U. 
S. expl. Exp., v.13n p.857; t.57 f.2a—h | 1862 Orchestoidea b., Bate, Cat. Amphip. 
Brit. Mus., p.13 t.2 f.4 | 1893 Orchestia gammarellus (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 499. 


Das Tierreich. 21. Lief.: T.R. R. Stebbing, Amphipoda I. 34 


530 Orchestoidea, Orchestia 


Body smooth. Side-plate 5 much shallower than 4! Pleon segment 3, 
postero-lateral corners quadrate. Eyes rather large, approximate in front. 
Antenna 1 very short, flagellum 3-jointed. Antenna 2 in Q not half as 
long as body, flagellum scarcely as long as pedunele, about 16-jointed. 
Gnathoped 1 in d as in ©. Gmathopod 2 in JS, 6% joint large, subovate, 
palm slightly convex, spinulose, very oblique, defined- by a well marked 
angle but not toothed, finger elongate. Gnathopod 1 in © longer than 
gnathopod 2, finger thick, ceurved, not much shorter than -the palmless 
6! joint, which in figure appears longer than 5, Gmathopod 2 in Q, 
5th joint with very bulging hind margin, 6tt with straight front and bulging 
hind margin, distally narrowly produced much beyond the minute longitudinal 
finger. Peraeopods 4 and 5 much longer than the preceding peraeopods, 
24 joint broadly expanded, the rest slender, spinules numerous. Uropod 1 
rather long. Uropod 3 short, ramus as long as peduncle L. 12 mm. 


Rio Janeiro harbour. 


4. Gen. Orchestia Leach 


1793 [Subgen.] Gammarellus (part.), J. F. W. Herbst, Naturg. Krabben Krebse, 

v.2 p. 106 | 1802 Talitrus (part.), (Latreille in:) Bose, Crust., v.1 p.78 | 1802 T. 
(part.), Latreille, Hist. Crust. Ins., v. 3 p.38 | 1813/14 Orchestia 

(Sp. un.: O. littorea), Leach in: Edinb. Ene., v.7 p.402 | 1888 O., 

T. Stebbing in: Rep. Voy. Challenger, v.29 p. 602, 1678 | 1890 O,, 

G. O. Sars, Crust. Norway, v.1 p. 24 | 1893 O., A. Della Valle in: 

F. Fl. Neapel, v.20 p.494 | 1847 Scamballa (part.), (Leach in MS.) 

A. White, Crüst. Brit. Mus., p. 86 ! 1876 Orchestes (non Illiger 1798, 

Coleoptera!), R.T. Maitland in: Tijdschr. Nederl. dierk. Ver., v.2 p.11. 


Like Talitrus (p. 524) except that gnathopod 1 (Fig. 93) 


% in J and in © is less strongly developed and is subchelate 
or instead of simple, while gnathopod 2 in S is powerfully 
AN subchelate instead of feebly chelate. Antenna 2 in J perhaps 
never attains so strong a development as is met with in 

Da Talitrus and Talorchestia (p. 543); the maxillipeds seem 
Fig. 98. sometimes to have an obscure rudiment of the 4h joint of 


O. selkirki, 2. the palp, and the front lobe of side-plate 5 may be as deep 
Gnathopod 1. 25 side-plate 4. The notching of the finger in peraeopod 2 
is seldom so sharp and decided as in Talorchestia. 


Generally distributed in temperate and tropical seas between tidemarks among 
sea-weed and stones, as distinguished from the sand-dwelling Talitrus and Talorchestia, 
also found inland at various heights up to 1375 m above sea-level. 


23 accepted and 6 doubtful species. 


Synopsis of accepted species: *) 


inerassated — 2. 
Peraeopod 5in adult 3, 4th and öth joints not strongly 


Peraeopod 5 in adult 3, 4th and 5th joints strongly 
| 
inerassated — 6. 


Gnathopod 2 in 3, palm extremely oblique. ... 1. O. mediterranea. p.531 
Gnathopod 2in d, palm not extremely oblique — 8, 


*) Since this table is based upon structures of, the species 22 and 23, of 
which 5 speeimens are unknown, are omitted; they differ by the palm of gnathopod 1: 
feebly developed in 22, OÖ. parvispinosa p. 541, well developed in 23, O. montana p. 542. 


Orchestia 


Gnathopod 2in d, finger without astrong tooth — 4. 


r Gnathopod 2 in d, finger with a strong tooth — 5. 


Peraeopod 5 in adult S, 5th joint as broad as long, 


H> 


Peraeopod 5 in adult 3, 5th joint longer than broad, 


ae RN N er 8. 


Gnathopod 2 in d, tooth of finger central ; 
Gnathopod 2 ind, tooth of finger close to hinge 


b21 
Op 


Gnathopod 1 in 3, 4th joint with apical process — 7. 

Gnathopod 1 in d, 4th joint without apical 
process — 8. 

Gnathopod 2 in d, palm with two excavations 

Gnathopod 2 in d, palm smoothly convex 


6 


-1 


Body segments acquiring transverse dorsalridges — 9. 
Body segments not acquiring dorsal ridges — 10. 


je) 


9 


Peraeopod 5, 2d joint regularly expanded —- 11. 


| Gnathopod 2 in 8, palm not deeply concave — 12. 
Gnathopod 2 in d, palm with strong tooth near 
finger-hinge — 13. 
Gnathopod 2 in 3, palm without tooth near finger- 
hinge — 14. 


12 


13 


14 ? Gnathopod 2 ind, 6th joint not narrowing to the 
palm — 15. 

Gmnathopod 1 in Sg, 5th joint much longer than 6th — 16. 

Gnathopod 1 in d, 5th joint not much longer 


than 6th — 17. 


15 


16 


Gnathopod 2 in d, palm very oblique — 18. 
Gnathopod 2 in 3, palm not very oblique — 19. 


Gnathopod 1 in d, finger covering whole apex of 


- 17 


„ Gnathopod lin, Siner not covering whole apex 


ER - 18. 
Antenna 2 slender, flagellum eylindrie . . . . . 19. 


19 Antenna 2 stout, flagellum flattened — 20. 


Gnathopod 1 ing, 6th joint without prominent 


| Gnathopod 1 in d, 6th joint with prominent process 20, 


DEOBOBE in. le Rn re BE 21. 


ee er 2.0 


m 


Gnathopod 2 in S, palm slightly oblique. ... . 8. 
Gnathopod 2 in d, palm very oblique ..... 9. 


Peraeopod 5, 2d joint scarcely expanded . . . 10. 


Gnathopod 2 in d, palm deeply concave .... 11. 


Gnathopod 2 in d, palm with one strong tooth . 12. 
Gnathopod 2 in d, palm with two teeth . . . . 13. 


Gnathopod 2 in 3, 6th joint narrowing to the palm 14. 


Side-pate 5 deep. . . . . a 
Side-plate 5 not dep . :. 2. 2:0.» ee ı } 


N 17. 


551 


.gammarellus . p. 532 

O. chevreuxi . . p.533 
. O. montagui p. 533 
. O. tucurauna . . p.534 
O. bottae. . . . p.534 
O. traskiana p. 534 
O. serrulata p- 585 
O. guernei p- 536 
O. marmorata p. 586 
O. capensis. . . p.537 
©. chiliensis . P.587 
O. dentata » pP. 537 
O. selkirki . . . p.538 
O. pickeringii. . p.538 
O.nitida . . . .„. p.539 
O.humicola. . . p.539 
O. floresiana . p.539 
O. grillus. . . . p.540 
O. platensis . p.540 
O. sulensoni . p. 541 


1. ©. mediterranea A. Costa 1857 O.m., A. Costa in: Mem. Ace. Napoli, 
v.l p.181 | 1866 O.m., Cam. Heller in: Denk. Ak. Wien, &0.26u p.4 t.1 f.7 | 1881 
O. m., Nebeski in: Arb. Inst. Wien, v.3 p.143 | 1895 O. m., Chevreux in: Rev. biol. 


Nord France, v.7 p.158 | 1899 O. m., T. Scott in: Rep. Fish. Board Seotl., 


v.17 p. 264 


t.13 £.9—11 | 1857 O.laevis, Bate in: Ann. nat. Hist., ser.2 v.19 p.136 | 1862 O. 
trigonocheirus, Bate, Cat. Amphip. Brit. Mus., p.26 t.4 f.6 | 1893 O. chilensis (part.), 
O. spinimana, A. Della Valle in: F, Fl. Neapel, v.20 p.498 t.2 £.8; t.15 f.31—38; 


p. 129, 248, 941. 


34* 


L-— 


Pr 


nn BE :..; 
Be 
Bl: 


532 Orchestia 


Body rather compressed. Side-plate 1 much smaller than 24, 5th 


nearly as deep as 4", Pleon segment 3, postero-lateral corners quadrate. 


Eyes subrotund or transversely oval, dark, usually nearer together than 
their width. Antenna 1 reaching end of penultimate joint of pedunele of 
antenna 2, joints of peduncle subequal in length, flagellum shorter than 
pedunele, 6- or 7-jointed. Antenna 2 '/, as long as body or less, penultimate 
joint of pedunele °/, as long as ultimate, flagellum subequal to peduncle, 
20-jointed. Gmathopod 1 in JS, 5tk joint with the subapical pellucid process 
scabrous, broadly rounded, 6! much shorter, hind margin sinuous, distal 
pellueid process scabrous, point of finger not reaching its extremity, though 
extending beyond the genuine palm-margin. Gnathopod 2 in d, 4 and 
5th joints very small, 6% very large, piriform, narrow at the finger-hinge, 
near to which the long, extremely oblique, sinuous, spinulose palm at least 
usually forms a small tooth, finger very long and sinuous, its apex over- 
lapping the palm at commencement of short hind margin, although the palm 
itself ends with the short ehannelling adapted to receive the finger-point. 
Gmathopod 1 in Q, 5! joint without pellucid process, 6! shorter than 5th, 
spinose, oblong, with a small pellucid widening at apex of hind margin, 
which is considerably overlapped by the rather stout, acute finger. Gnathopod 2 
in Q, 24 joint expanded, laminar, narrowing distally, 4" joint with a distinet, 
though not much produced, rounded process at apex of hind margin, 5th 
produced along much of free part of hind margin, process longitudinally 
truncate, 6!" widening to a broadly rounded process which does not extend 
far beyond the palm proper and apex of finger. Peraeopod 3, 24 joint broadly 
oval, 4 and 5t" rather stout. Peraeopod 4, 24, 4th and 5th joints much 
longer, 24 oblong oval. Peraeopod 5, 24 joint much wider than in peraeopod 4, 
hind margin with lower corner broadly rounded, 4! joint in J triangular, 
distally much widened, with apex of hind margin truncate, 5tR joint in CS 
not longer than broad, immediately from narrow point of attachment widened 
on both sides beyond the broad distal end of 4% joint, then narrowing to apex 
which is still much wider than the linear 6t% joint; in O 4 and 5tk joints not 
at all wider than those of peraeopod 4. Uropod 1, rami considerably shorter 
than peduncle. Uropod 2, rami subequal to peduncle, outer ramus shorter 
than inner. Uropod 3, ramus’rather shorter than the stout pedunele. Telson 
triangular, fringed with spinules. Colour greenish brown. L. 15 mm. 


Mediterranean; North-Atlantic (France, England, Wales, Ireland). Sometimes 
considerably beyond high-water mark. 


2. O. gammarellus (Pall.) 1766 Oniscus g., Pallas, Mise. zool., p.191 t.14 

f.25 | 1791 Gammarus g., A. G. Olivier in: Ene. möth., v.6 p.187 | 1793 Cancer g., 
J. F.W. Herbst, Naturg. Krabben Krebse, v.2 p. 129 t. 36 f.2, 3 | 1802 & 03 Oniscus g., 
Talitrus (part.), Latreille, Hist. Crust. Ins., v.3 p.39; ©.6 p.300 t.56 f.5, 6 | 1872 
Örchestia g., A. Boeck, Skand. Arkt. Amphip., v.1 p.102 | 1888 O.g., T. Stebbing in: 
Rep. Voy. Challenger, v.29 p.1714 | 1893 O. g. (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p.499 t.2 f.11; t.15 f.1—12, 39—43 | 1808 Cancer (Gammarus) littoreus, Montagu 
in: Tr. Linn. Soc. London, v.9 p.96 t.4 f.4 | 1812 Astacus l., Pennant, Brit. Zool., 
ed.5 v©.4 p.82 | 1813/14 Orchestia littorea, Leach in: Edinb. Ene., %.7 p.402 t. 221 
f.6 | 1890 O.1., G.O. Sars, Crust. Norway, v.1 p.24 t.10 | 1876 Orchestes I., R.T. 
Maitland in: Tijdschr. Nederl. dierk. Ver., v.2 p. 11 | 1840 Orchestia littoralis, H. Lucas in: 
Hist. An. artie., Crust. Arach. Myr., p.225 | 18480. euchore, Friedr. Müller in: Arch. Naturg., 
v.141 p.58 t.4 | ?1852 O. dispar, J.D. Dana in: P. Amer. Ac., v.2 p.204 | ?1853 & 55 
O.d., J.D. Dana in: U.S. expl. Exp., v.13n p.878; t.59 £.6a—m | 1868 O. brevidigitata, 
Bate & Westwood, Brit. sess. Crust., v.2 p.497 f. | 1886 O. chilensis (err., non O,. chiliensis 
. Milne Edwards 1840!), G. M. Thomson & Chilton in: Tr. N. Zealand Inst., v.18 p. 145. 


z 
u 
x 
} 
E 
Di 


u N ec! 


Orchestia s 533 


Body rather compressed. Side-plate 1 small, 24—4th quadrate, the 
small process of hind margin distinet, 5!" broad, in front nearly as deep 
as 4th, Pleon segment 3, postero-lateral corners quadrate. Eyes irregularly 
rounded, black, less than the diameter apart. Antenna 1 seldom reaching 
beyond penultimate joint of peduncle of antenna 2, 1° joint shorter than 
24 or 34, flagellum 6—8-jointed. Antenna 2 about '/, as long as body, 
ultimate joint of peduncle sometimes considerably longer than penultimate, 
flagellum about 20-jointed. Gnathopod 1 in C', 6% joint shorter than 5th, 
both distally widened, 6! usually resting on produced part of 5th, finger 
matching transverse palm, but not covering the produced part of 6 joint. 
Gnathopod 2 in J, 24 joint channelled in front, not lobed, 5tt very small, 
6th Jarge, widening to the palm, which is almost transversely arcuate between 
a depression adjoining finger-hinge and an obtuse defining projecetion. Gnatho-: 
pod 1 in O, 5!" joint distally widened, 6!" narrowly oblong, the short trans- 
verse palm overlapped by finger. Gnathopod 2 in ©, 24 joint membranaceous, 
broader above than below, 5!" with free hinder part bulging, 6" produced, 
but not very greatly. beyond the small, rather obliquely placed finger; 
marsupial plates rather narrow, long, fringed with long setae. Peraeopod 2 
shörter than peraeopod 1, finger with sinuous inner margin. Peraeopods 
3—5 successively longer, 24 joint well expanded. Peraeopod 5 in 9, 4 
joint greatly widening distally, 5" greatly expanded, widest near base, both 
these joints having flattened edges before and behind, and in adolescent CS 
showing numerous gradations to the linear form found in © and young; 
6th joint straight. Uropod 1 rather long, rami shorter than peduncle, both 
with lateral spines. Uropod 3, ramus much shorter than peduncle. . Telson 
soft, thick, about as broad as long, apex ae emarginate. Colour 9 
brownish, © greenish. L. about 17 mm. 

North-Atlantie with adjoining seas (Europe, from the Baltie'to the Black Sea; 
Algiers; Madeira; Azores); ?South-Pacific (lllawarra [New South Wales], sea alkansel. 


3. O. chevreuxi Guerne 1887 O.c. (2), Guerne in: Naturaliste, v.9 (p.6) | 
1888 O.c. (2), Guerne in: Bull. Soe. zool. France, v.13 p.59 f.1, 3,5, 7 | 1888 ©. c. (S), 
Chevreux in: Bull. Soc. zool. France, v.13 p.92 f.1,3,5 | 1888 O. littorea (part.)?, T. 
Barrois in: Bull. Soc. zool. France, v.13 p.19 | 1893 O. gammarellus (part.), A. Della Valle 
in: F. Fl. Neapel, v.20 p.499. 

Distinguished from O0. gammarellus in SC by: peduncle of antenna 2 
longer and more robust, flagellum also more elongate (the 18—20 joints being 
mostly longer than broad), gnathopod 2, 6 joint more broadly oval, palm 
much more convex, with deep groove adjoining the defining angle, finger 
shorter and more robust, peraeopod 5 more elongate, with 4! and 5tk joints 
robust but much longer than wide, 6!" joint long, eurved; in © by: antennae 1 
and 2 longer, gnathopod 2, 24 joint much less widened, 4'h joint carıying 
2 spines on apex, 5th and 6fh joints more elongate, peraeopod 5 longer, 
with very long, slightly curved 6! joint, uropods 1 and 2 longer, uropod 3 
with much stronger spines on peduncle, telson with stronger spinules, and 
its narrower apex much more sharply emarginate. Colour violet, almost 
rose, deeper above. L. about 15 mm. 

Azores (Fayal, in the caldiera or erater); Teneriffe (in the forest of Las Mercedes, 
under detritus on the banks of streamlets, not less than 500 m above sea-level). 


4. O.montagui Aud. 1826 O. m., Audouin in: Deser. Egypte, v.1ıv p.93 Crust. 
t.11 £.7 | 1866 O. m., Cam. Heller in: Denk. Ak. Wien, v.26ı7°p.2 t.1 f.3,4 | 1866 
O. m., E. Grube in: Arch. Naturg., v.321 p.380 t.9 f.1,2 | 1868 O. m., Czerniavski in: 


- 


534 Orchestia 


Syezda Russ. Est., Syezda 1 Zool. p.118 t.8 f.34—39 | 1893 O. m., Chevreux in: Bull. 
Soe. zool. France, v.18 p.128 f.2 ! 1895 O.m., Chevreux in: Rev. biol. Nord France, 
v.7 p.158 | 1837 O. littorea (err., non Leach 1813/14!), H. Rathke in: Mem. pres Ac. 
St.-Pötersb., v3 p.371 t.5 f.1—6 | 1862 O. I. (part.), Bate, Cat. Amphip. Brit. Mus., 
p- 27 | 1893 O. gammarellus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 499. 
Extremely variable, by gradual transitions completely united with. 
O. bottae (Czerniavski); still nearer to O. gammarellus (p. 532) by the 
expanded 4th and 5th joints in peraeopod 5 of adult d. Finger of gnatho- 
pod 2 in d powerfully arched at the hinge, with a projeetion in middle of 
inner margin, which becomes very prominently developed, forming a blunt tooth; 
in Savigny’s figure (in: Deser. Egypte) the 6% joint has the palm defined 
by an obvious tooth, which other authors do not represent. L. 15 mm (Rathke). 
Mediterranean and Black Sea. 


5. O.tucurauna Fr. Müll. 1864 O.t., O. tucuratinga, Fritz Müller, Für Darwin, 
p-54 f.50, 51 | 1893 O. gammarellus (part.), A. Della Valle in: F. Fl. Neapel, v.20 
p. 499, 510. 


S (young, but mature). Antenna 2 slender, joints of flagellum distinct; 
gnathopod 2 with palm uniformly convex, peraeopod 5 slender and like 
peraeopod 4; subsequently 2, 3 or 4 proximal joints of flagellum of antenna 2 
are fused together, gnathopod 2 acquires a deep emargination in palm elose 
to the finger-hinge and a process of the finger fitting this eavity, while the 
4th and 5th joints of peraeopod 5 are swelled to a considerable incrassation. 
The figure of gnathopod 2 in G shows a very broad 6!" joint, with spinulose 
palm, slightly oblique, not defined by any tooth. The figure of gnathopod 2 
in © shows a well expanded 24 joint, 5% bulging, not much longer than 
6'h, which is broadly rounded at apex and little produced beyond the minute 
longitudinal finger. L.? 


Brazil? 


6. ©. bottae M.-E. 1840 O. b., H. Milne Edwards, Hist. nat. Crust., ©.3 
p-17 | 1851 O.b., F. Brandt in: Bull. phys.-math. Ace. St.-Pötersb., v.9 p.141 | 1868 
O.b. + ?0O.b. var. feminaeformis (juv.), Üzerniavski in: Syezda Russ. Est., Syezda 1 
Zool. p.117 t.8 f.28, (297), 30—82 | 1865 O. cavimana, Cam. Heller in: Verh. Ges. Wien, 
v.15 p.979 t.17 | 1879 O.c., Hoek in: Tijdschr. Nederl. dierk. Ver, v.4 p.131 t.9 
f.8—10 | 1881 O. c., Nebeski in: Arb. Inst. Wien, v.3 p.142 t.2 £.10 ete.; t.3 f.21 ete. | 
1895 O. bottae + O. c., Chevreux in: Rev. biol. Nord France, v.7 p.156 f.1—4; p. 158. 

Closely related to O. grillus (p. 540). Eyes roundish. Antenna 1, 
joints of pedunele successively longer, flagellum 6-jointed. Antenna 2 less 
than '/, as long as body, flagellum 14—22-jointed. Gnathopod 1 in JG, 
5th and 6tk joints strongly produced at hinder apex; also the 4" joint has 
at least sometimes a small prominence at hinder apex; finger overlapping 
palm, but not reaching end of apical process. Gnathopod 2 in J, 6% joint 
large, broadly suboval, palm oblique, divided into 3 protuberances, the broadest 
central, separated (in adults) by a deep excavation from that next finger- 
hinge, and a shallow one from the small defining tubercle; finger long, with 
margin bulging at a point corresponding to excavation in palm. Peraeopod 5, 
4 and 5tk joints not specially widened at any stage. Colour very dark, 
almost black (Heller). L. 12—21 mm. 


Black Sea; Palestine; Cyprus (Mt. Olympus, 1255 m above sea-level); Holland 
(in garden remote from sea); France. 


7. O. traskiana Stimps. 1857 O.t., Stimpson in: P. Calif. Aec., v.1 p.90 | 1857 
O.t., Stimpson in: Boston J. nat. Hist., ©.6 p.517 | 1862 O.t., Bate, Cat. Amphip. Brit. 
Mus., p.19 t.3 £.4 | 1893 O.t., A. Della Valle in: F. Fl. Neapel, v.20 p. 510. 


1 


Orchestia 535 


Side-plates 2—4 quadrate, much larger and deeper than 1% or 5th, 
‚Eyes squarely rounded, black, less than the diameter apart. Antenna 1 
reaching end of penultimate joint of peduncle of antenna 2, flagellum 
shorter than peduncle, 5-jointed. Antenna 2, about '/, as long as body or 
a little more, ultimate joint of peduncle not much longer than penultimate, 
flagellum subequal to pedunele, 16-jointed in S, 12-jointed in 9. Gnathopod 1 
in S, 5th joint not very much longer than 6tk, 4th, 5th and 6th joints pro- 
duced behind into pellueid bosses, successively larger, narrow on joints 4 
' and 5, broad on joint 6, which has a transverse palm, finger small, only 
reaching end of true palm, not overlapping the boss. Gnathopod 2 in J, 
24 joint with front margin very slightly convex, not lobed, 34 joint lobed, 
5th very small, 6tk large, ovate, widening slightly to the oblique, convex, 
spinulose palm, which ends in a slight notch at the defining angle, finger 
large, curved. Gnathopod 1 in oO, 4 and 5th joints not produced into 
processes, 5t subapically widened, 6% narrowly oblong, with a scarcely 
perceptible scabrous pellucid apical widening, which as well as the little 
transverse palm is overlapped by the finger. Gnathopod 2 in ©, expansion 
of 24 joint wider above than below, 4 joint squared at distal hind corner, 
5th with very convex free part of hind margin, 6" not much shorter, well 
produced beyond the small longitudinal finger. The young from the 
marsupium have gnathopods 1 and 2 almost exactly as in the mother. 
Peraeopod 2, finger with sinuous inner margin. Peraeopods 3—5, 24 joint 
broadly oval, successively larger, hind margin spinulose, 4tk joint moderately 
wide. Uropods 1 and 2 not very spinose, rami not much shorter than 
peduncle, both rami with marginal spines. Uropod 3, ramus slender, nearly 
as long as peduncle. Telson spinulose about apex. Colour light grey, 
sometimes greenish or brownish, always very pale. L. 0 15 mm, O smaller. 


North-Paeifie (San Franeisco). Among the rejectamenta along high-water mark. 


8. O. serrulata Dana 1852 O.s., J. D. Dana in: P. Amer. Ac., v.2 p.204 | 
1853 & 55 O.s., J.D. Dana in: U.S. expl. Exp., v. 1311 p. 870; t.58 f.7a—l (5), m—o 
(2°) | 1893 O.s., A. Della Valle in: F. Fl. Neapel, 0.20 p.498 t.57 £.61, 62 | 1862 O. 
aucklandiae + 0. s., Bate, Cat. Amphip. Brit. Mus., p.17 t.1a £.3; p.31 t.5 £.4 | 1886 
O.a., G. M. Thomson & Chilton in: Tr. N. Zealand Inst., v.18 p.145 | 1893 O.a,, 
A. Della Valle in: F. Fl. Neapel, v.20 p.505 t.57 f£.65 | 1885 O. ornata, Filhol in: 
Reeu. Passage Venus, v.311 Zool. p. 468 t.53 f.2. 


In S peraeon segment 1 encircled by a raised ridge or corrugation, 
segments 2—7 (Thomson & Chilton: 2—5) similarly corrugated, except that the 
front ridge is withdrawn from the front of the segment, and sometimes a 
little broken; this character (not mentioned by Dana and Bate) is wanting 
in © or barely indieated. Side-plate 1 small, front margin straight, the 
others or at least 24—5t in J with eneireling idge, 24-4! having a 
conspicuous ridge down the centre. Pleon segment 3, postero-lateral corners 
quadrate, in Q with a minutely produced point. Eyes subrotund, dark, in 
both sexes wider apart than their diameter. Antenna 1 in J reaching 
half-way along penultimate joint of pedunele of antenna 2, in O to the end 
of it; 3 joints of peduncle subequal, flagellum 6- or 7-jointed. Antenna 2 
smooth, much larger in C than in O, pedunele angular in section, ultimate 
joint not greatly longer than penultimate, both long in JS; flagellum 17- or 
18-jointed, shorter than peduncle in d, longer in 9. Gmathopod 1 in GC, 
5th joint strongly produced into subapical tuberele, 6% shorter, but with 
apical process broadly produced, so that the finger does not reach the end 


536 Orchestia 


of it. Gmathopod 2 in J, 6th joint massive, widening to the palm, which 
is spinulose, slightly oblique, in shape variable, sometimes deeply excavate 
near finger-hinge, then running with straight slope to an acute defining 
tooth, sometimes more gently sinuous between hinge and tooth (in Dana’s 
figure ending in a broad excavation with untoothed defining angle); finger long 
to match the palm, its point passing the tooth. Gnathopod 1 in 9, 6" 
joint shorter than 5%, spinose, slightly narrower at apex than base, but 
still affording a small palm to the overlapping finger. Gmnathopod 2 in ©, 
24 joint evenly and nowhere widely expanded, 34 rather long, 5!" not much 
longer than 6, 6 roundly produced a little way beyond the finger. 
Peraeopods 3 and 4, 24 joint oval. Peraeopod 5, 24 joint notably serrulate 
on hind margin, which, instead of being rounded below as in peraeopods 3 
and 4, is squared or angularly produced. In peraeopods 4 and 5, the 4th 
and 5th joints are moderately stout, somewhat angular in section. Uropods 
1—3, all the rami with marginal spines, in uropod 1 rami shorter than 
peduncle, in uropods 2 and 3 subequal to it. Telson with the usual little 
apical notch, and a few spinules. L. S sometimes exceeding 25 mm, 
O very much smaller. 


South-Paeifie (New Zealand). Among sea-weed and under stones between tide-marks. 


9. O. guernei ÜUhevreux 1889 O.g., Falorcheskiat, Chevreux in: Bull. Soe. zool. 
France. v.14 p.332 f. 


© unknown. — d. Body tumid, all segments dorsally elevated, 
peraeon segments 6 and 7 and pleon segment 1 each with 2 transverse 
dorsal ridges. Side-plates not very deep. Pleon segment 3, postero-lateral 
corners simply quadrate (in figure). Eyes ovate. Antenna 1 reaching end 
of penultimate joint of peduncle of antenna 2. Antenna 2 half as long 
as body, ultimate joint of pedunele much longer than penultimate, flagellum 
18-jointed. Gnathopod 1 rather robust, 5tk and 6* joints strongly produced 
apically. Gnathopod 2, 6! joint large, very broad, palm much longer than 
the very short hind margin, finger robust, strongly curved, matching the 
long palm. Peraeopod 4 very strong, 4! and 5th joints much longer than 
broad. Peraeopod 5 not known. Uropods 1—3 and telson nearly as in 
O. gammarellus (p. 532). L. 9 mm. 


Bay of Horta [Azores (Fayal)]. In the sand. 


10. O. marmorata (Hasw.) 1880 Talorchestia? m., Haswell in: P. Linn. Soe. 
N.S. Wales, v.5 p.99 t.5 f.3 | 1893 T. m., Orchestia chilensis (part.)?, A. Della Valle in: 
F. Fl. Neapel, 0.20 p. 512. 


> unknown. — GC. Side-plates with spinuliferous lower margin, 
1° very small, sometines quite concealed by 24, . Eyes irregularly oval, wider 
than diameter apart, dark in spirit. Antenna 1 slender, flagellum 5-jointed. 
Antenna 2 more than thrice as long as antenna 1, about ’'/, as long as body, 
peduncle stout, flagellum as long as peduncle, flattened, with 17 joints, which are 
short and most of them broad. Gmnathopod 1, 5tk joint subequal to 6!%, distally 
produced into a narrow, rounded process, 6% much widened distally, palm 
transverse, finger well developed, overlapping the true palm but not the 
broad pellueid process of hind margin of 6% joint. Gnathopod 2, 6 joint 
large, oval, palm oblique, defined by a minute acute tooth. Peraeopods very 
thick, spinose, finger of peraeopod 2 with irregular inner margin, 24 joint 
of peraeopod 5 not dilated behind except at the top. Uropod 3 small, 


Orchestia 537 


. ramus shorter than peduncle. Telson spinulose, with slightly notched apex. 


The whole of the Ban very hard. Colour, marbled red and white. 
L. 16 mm. 


Tasmania. 


11. O. capensis Dana 1853 & 55 O. c., J. D. Dana in:-U.S. expl. Exp., v.13ı 
p-866; t.58 f.3a,b | 1862 O.c., Bate, Cat. Amphip. Brit. Mus., p.23 t.4 f.2 | 1893 
O. c., A. Della Valle in: F. Fl. Neapel, v.20 p. 506 t.57 £. 69. 


. 9 unknown. — d. Side-plates 2—6 very large, 5{% nearly as deep 
as 4th, Eyes subrotund. Antenna 1 reaching end of penultimate joint of 
peduncle of antenna 2, flagellum 7—10-jointed. Antenna 2 rather more 
than half as long as body, ultimate joint of peduncle twice as long as 
penultimate or more, flagellum rather longer than peduncle, 14—16-jointed, 
setules minute. Gnathopod 1, 5tk joint without apical process (Bate), 6!" narrow, 
scarcely widened at apex, which is excavato-truncate, finger hardly longer 
than apex (Dana) (Bate: longer than apex). Gmathopod 2, 6! joint large, 
robust, widening to the palm, which is deeply, almost semieircularly excavate 
between a small tooth adjoining finger-hinge and the acute defining tooth. 
Peraeopods 1—5 all robust, with groups of spines rather crowded, 24 joint 
in peraeopods 3—5 broadly expanded; peraeopods 4 and 5 longer than the 


- rest, but not elongate. L. 16—18 mm. 


Cape of Good Hope. 


12. O. chiliensis M.-E. 1840 O.c., H. Milne Edwards, Hist. nat. Crust., v.3 


p-18 | 1888 0. c., T. Stebbing in: Rep. Voy. Challenger, v.29 p.185 | 1898 O.c., G 


M. Thomson in: Tr. N. Zealand Inst., ©.31 p.199 | 1849 O. chilensis, Nicolet in: Gay, 
Hist. Chile, v.3 p. 235 | 1853 & 55 O. c.?, J. D. Dana in: U.S. expl. Exp., v. 1311 p.867; 
t.58 f.4 | 1862 O.c., Bate, Cat. Amphip. Brit. Mus., p.30 t.1a f.8 | 1893 O.c. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 498. 


In general like O. mediterranea (p. 531). Antenna 1, 24 and 34 joints 
of peduncle each longer than 1°, flagellum shorter than peduncle, 6- or 
7-jointed. Antenna 2, ultimate and penultimate joints of peduncle very stout, 
and the latter little shorter than the former; flagellum shorter than pedunele, 
17-jointed. Gnathopod 2 in 9, 6! joint very large, the palm having a 
large obtuse tooth near finger-hinge, and thence running rather sinuously 
and obliquely but not extremely so to meet the hind margin which is longer 
and better defined tban in O. mediterranea; finger long, rather sinuous. 
Peraeopod 5, 24 joint tending to quadrate at lower hind corner, 4% and 
5th joints stout, but little more so than in peraeopod 4, both much longer 
than broad. Uropods 1 and 2, rami shorter than peduncle. Uropod 3, ramus 
much shorter than peduncle. L. 16—18 mm. 


Pacifie (Chili; New Zealand). Under stones and in little pools between tide-marks. 


13. O. dentata Filh. 1885 O.d., Filhol in: Recu. Passage Venus, v.311 Zool. 
p: 462 t.53 £.1 | 1898 O, telluris?, G.M. Thomson in: Tr. N. Zealand Inst., v.31 p. 200. 


Antenna 1 reaching end of penultimate joint of peduncle of antenna 2. 
Antenna 2 rather more than half as long as body, penultimate joint of 
peduncle inflated in the middle, flagellum less than half as long as pedunele. 
Gnathopod 1, 5t% joint distally widened, the lateral faces ecompressed, 6! joint 
more reduced than 5th, Gnathopod 2, 6! joint robust, almost globular, 
palm with a tolerably strong tooth at centre and a small one near the point‘ 


538 Orchestia 


to which the finger tip is applied; finger with prominence which closes down 


immediately behind central tooth of palm. Peraeopods 1—3 successively larger, 
peraeopod 5 a little longer than peraeopod 4. L. 13 mm. 


Cook Strait (Isle of Kapiti). 


14. O. selkirki Stebb. 1888 O.s., T. Stebbing in: Rep. Voy. Challenger, v. 29 
p- 603 t.1,2 | 1893 O. gammarellus (part.), A. Della Valle in: F. Fl. Neapei, v.20 p.499. 


In general closely resembling O. gammarellus (p. 532). Antenna 1 in J, 
flagellum 8- or 9-jointed, in © 6-jointed. Antenna 2 in JG, flagellum reaching 
28 joints. Maxillipeds, atuberele representing 4* joint ofpalp. Gnathopod1inO, 
see Fig. 93 (p. 530). Gmnathopod 2 in d, 6! joint very large, widest near 
base, narrowing slightly to the very sinuous, spiniferous palm, the strong 
finger having inner margin divided into 2 concave spaces, the first elosing 
over the little concavity and great convexity of the palm, the second leaving 
a narrow space between itself and the remainder of the palm, which ends 
in a groove for receiving the finger tip. Gmathopod 2 in Q, 24 joint not 
greatly widened, narrowing downward, 6 joint broadly produced beyond 
the minute, obliquely placed finger. Peraeopod 5, 4 and 5th joints in 
both sexes long and narrow. Uropod 3, ramus about as long as peduncle. 
Telson as broad as long, spinulose, the narrow apex a little emarginate. 
L. 13—17 mm. 


South-Paeifie (Juan Fernandez). Shore. 


15. O. pickeringii Dana 1853 & 55 O.p., O. pickeringi, J. D. Dana in: U. 


S. expl. Exp., v.13u p.882, 1595; 1.59 f.9 (3) | 1862 O. pickeringiüi, Bate, Cat. Amphip. 


Brit. Mus., p.32 t.5 f.6 | 1879 O. macleayana, Haswell in: P. Linn. Soc. N. S. Wales, 
v.4 p.250 t.7 f.2 | ?1885 Allorchestes crassicornis var. coogeensis, Chilton in: P. Linn. 
Soe. N.S. Wales, v.9 p.1035 t.46 f.1 a, b | 1893 Orchestia gammarellus (part.), A. 
Della Valle in: F. Fl. Neapel, v.20 p. 499. 


Body not very stout. Side-plates not deep, 5" nearly or quite as deep 
as 4:h, Pleon segment 3, postero-lateral angles quadrate, with minutely 
produced point. Eyes variable in size, shape and distance apart, dark. 
Antenna 1 reaching end of penultimate joint of peduncle of antenna 2, 
3 joints of peduncle subequal in length, flagellum 4—6-jointed. Antenna 2 
scarcely half as long as body, ultimate joint of peduncle not greatly longer 
than penultimate, both becoming broad in J, flagellum longer(?) than 
pedunele (Dana), with 12-joints, 1° in Q representing 3 or 4 coalesced. 
Maxilla 1, palp very minute. Gnathopod 1 in Q', 5tt joint much longer 
than 6", with narrowly rounded pellucid process, 6% with broadly rounded 
process, not overlapped by the finger. Gnathopod 2 in J, 6tk joint large, 
ovate, palm with 2 (sometimes coalesced) convex spinulose processes, the 
one near the finger-hinge much the broader (not in Dana’s figure); finger 
stout, evenly curved (in Dana rather sinuous), reaching recess formed by 
advance of hind margin beyond 24 process of palm. Gnathopod 1 in O2, 
6th joint narrowly oblong, with small apical pellucid process, overlapped by 
the finger. Gmnathopod 2 in Q, 24 joint well expanded above, 4!h scarcely 
lobed, 6!" nearly as broad and long as 5t", the produced apex well rounded. 
Peraeopod 5, 24 joint as usual considerably broader than in peraeopods 


3 and 4; 4th and 5th joints rather stout, eylindrical in peraeopods 4 and 5. 


Pleopods very‘slender. Uropod 1, outer ramus with spines only at apex. 
Uropod 3 small, ramus shorter than pedunele L. about 12 mm. 


Paeific(Hawaiian Islands; California; New South Wales). Among decaying sea-weed. 


| 
| 


Örchestia 539 


16. O.nitida Dana 1852 O.n., J. D. Dana in: P. Amer. Ac., v.2 p.204 | 1853 
& 55 O.n., J. D. Dana in: U.S. expl. Exp., v. 1311 p.868; 1.58 f.5a—f (f.6a—d?) | 
1862 O.n. + 0. fuegensis, Bate, Cat. Amphip. Brit. Mus., p.29 t.5 £.1; p.17 t.la 
f.2 | 1893 O. gammarellus (part.) + O. chilensis (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p.499, 498. 


Body compressed. Side-plates of moderate size, 5! decidediy less 
deep than 4. Pleon segment 3, postero-lateral corners slightly recurved. 
Eyes round. Antenna 1 reaching end of penultimate joint of pedunele of 
antenna 2 (Dana) (Bate: beyond it), flagellum 5-jointed. Antenna 2 shorter 
than half the body (Dana); pedunele short, ultimate and penultimate joints 
subequal, flagellum 14- or 15-jointed, flattened. Gnathopod 1 in C, 5tk joint 
eonsiderably longer than 6", with subapical process, 6" apically widened, 
obliquely truneate (Dana), the obliquity slight in the figure; finger not quite 
reaching extremity of apical process. Gnathopod 2 in J, 6% joint large, 
subovate, palm straight, nearly longitudinal, with terminal groove for apex 
of long finger (Dana), oblique (Bate). Gnathopod 1 in ©, 6! joint narrowly 
oblong, finger overlapping the short palm (Bate; not observed by Dana). 
Gnathopod 2 in 9, 4% joint with scabrous apical process, 5t with free 
hind margin bulging, 6!" narrowly produced beyond the longitudinal finger. 
Peraeopods 4 and 5 with numerous short spines on the slender 5tk and 6th 
joints. Uropod 1, outer ramus with only apieal spines. Colour green. 
L. about 8—12 mm. 


Tierra del Fuego (among floating Fucus, near the shores); Port Famine. 


17. O.humicola Marts. 1868 O. h., E. v. Martens in: Arch. Naturg., v. 341 
p-56 | 1888 O.h., T. Stebbing in: Rep. Voy. Challenger, v.29 p.884 | 1892 O.h., M. 
Weber, Reise Niederl. O.-Ind., v.2 p.569 | 1893 O. h., A. Della Valle in: F. Fl. Neapel, 
v.20 p. 509. 


Side-plates 1—4 comparatively large, rounded, the 5t" somewhat less deep 
and much narrower than the 4, Pleon segment .3, postero-lateral corners 
quadrate, margin above irregularly serrulate.. Eyes long-oval, rather more 
than the smaller diameter apart. Antenna 1, flagellum shorter than peduncle, 
3—5-jointed. Antenna 2 half as long as body, flagellum as long as peduncle, 
12—15-jointed. Gnathopod 1 in J, 5tk joint with inconsiderable distal 
convexity, 6" distally widened, palm sinuous, finger strong, reaching end 
of apex of 6% joint. Gmathopod 2 in J, 6*h joint strong, long-oval, palm 
long, gently convex, spinose, oblique, finger long and strong, ending with 
abruptly narrowed eylindrical apex, overlapping the palm. Gnathopod 1in oO, 
5th joint not very long, 6tk not distally widened, palm very short, concave, 
finger large, hooked, overlapping palm. Gnathopod 2 in-O, 4" joint distally 
lobed, 5!" with free part of hind margin bulging, 6!" not far nor yet broadly 
produced beyond the little oblique palm. Peraeopod 5, 24 joint rather 
strongly serrate or erenulate on upper part of hind margin. Uropod 1, 
rami considerably shorter than pedunele, outer ramus with only apieal 
spines. Uropod 3, conical ramus as long as peduncle, with an apical spine. 
L. nearly 8 mm. 


Japan. Among damp fallen leaves. 
18. ©. floresiana M. Weber 1892 O.f., M. Weber, Reise Niederl. O.-Ind., v.2 
p- 562 f. 9—12. 


Pleon segment 3, postero-lateral corners produced to a point, margin 
above eonvex, smooth. Eyes round, somewhat less than the diameter apart. 


540 Orchestia 


Antenna 1, joints of peduncle successively shorter, flagellum shorter than 
pedunele, 4-jointed. Antenna 2 about '/;, as long as body, ultimate and 
penultimate joints of peduncle elongate, flagellum 12—16-jointed. Gmatho- 
pod 1 in Cd, 5th and 6th joints strongly produced apically, 6" shorter than 
5th, finger overlapping palm, but not reaching end of apical process. Gnatho- 
pod 2 in d, 6th joint large, oval, palm not very convex, ending in long 
groove for apex of the long finger. Gnathopod 1 in Q, 5th joint longer 
than 6t%, not greatly widened distally, 6% narrowly oblong, finger a little 
longer than palm. Gnathopod 2 in ©, 5tk joint not longer than 6, hind 
margin bulging, 6% broadly produced beyond the little concave palm and 
longitudinal finger. Peraeopod 5, 24 joint with spines on front and many 
spinules on hind‘margin. Uropod 1, rami shorter than pedunele, outer ramus 
with only apical spines. Uropod 3, ramus rather shorter than peduncle. 


Flores. 


19. O. grillus (Bose) 1802 Talitrus g., Bose, Crust., v.2 p.152 t.15 f.1,2| 
1803 T.g., Latreille, Hist. Crust. Ins., 0.6 p.300 | 1840 T'. gryllus, Orchestia (part.)?, H.Milne 
Edwards, Hist. nat. Crust., ©.8 p.17 | 1844 O. g., De Kay, Zool.N.-York, v.6 p.36 t.7 
f.19 | 1862 O. g., Bate, Cat. Amphip. Brit. Mus., p.18 t.3 f.2 | 1847 O.g. (Scamballa 
sayana Leach in MS.), A. White, Crust. Brit. Mus., p.86 | 1873 O. palustris, (S. I. Smith 
in:) A. E. Verrill in: Rep. U. S. Fish Comm., v.1 p.555 | 1893 O. gammarellus (part.)?, 
A. Della Valle in: F. Fl. Neapel, «.20 p.511. 


Much resembling O. gammarellus (p. 532). Pleon segment 3, postero- 
lateral corners acute, a little produced, margin above almost smooth. Eyes. 
subrotund, rather large, dark, nearer together than their width. Antenna 1 
about reaching end of penultimate joint of pedunele of antenna 2. Antenna 2 
rather slender, flagellum 17—25-jointed. Gnathopod 1 in J, 4" joint with 
concave distal margin, 5!" joint with subapical process prominent, narrow, 
6'h with apical widening strongly produced outward and a little downward, 
finger matching apical margin. Gnathopod 2 in d, 24 joint not distally 
widened, 6! becoming very large, oval, palm spinulose, subequal to hind 
margin, oblique, eonvex between 2 slight depressions, finger large, the point 
not very acute. Gnathopod 1 m Q, 5tt and 6tk joints spinose, 6th narrow, 
parallel-sided, finger matching or overlapping the small, slightly concave 
palm. Gnathopod 2 in ©, 24 joint broadly laminar, hind margin nearly 
straight, front strongly convex except just at distal end, 5th rather broad, 
6th distally produced beyond the slightly oblique finger. Peraeopod 2, inner _ 
margin of finger scarcely irregular. Peraeopods 4 and 5 with 4 —6th joints. 
long and slender, even in the largest specimens of both sexes. Uropod 1, 
rami shorter than peduncle, both with marginal spines. Uropod 3, ramus 
shorter than pedunele. Telson spinulose. L. reaching in Q 18, in S 22 mm. 


Atlantic coasts of North America. Under vegetable detritus and sand, also in salt- 
marshes and up to fresh water; at times above high-water mark in almost dry places. 


20. O. platensis Kroyer 1845 O. p., Kroyer in: Naturh. Tidsskr., ser.2 v1 
p-.304 t.2 f.2 | 1862 O.p., Bate, Cat. Amphip. Brit. Mus., p.19 t.3 £.3 | 1867 O. crassi- 
cornis, A. Costa in: Annuario Mus. Napoli, v.4 p.38 | 1895 O. c., Chevreux in: Rev. 
biol. Nord France, v.7 p.154 | 1873 O.agilis, (S. I. Smith in:) A. E. Verrill in: Rep. 
U. S. Fish Comm., v.1 p.555 t.4 f.14 | 1893 O, gammarellus (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 499 | 1883 O. tiberiadis, L. Lortet in: Arch. Mus. Lyon, v. 3 p. 190 £.- 
1888 OÖ. ineisimana, Chevreux in: Ü.-R. Ass. Frane., Sess. 17 ».2 p. 346 t.6 £.1,2. 


Orchestia 541 


Pleon segment 3, postero-lateral corners quadrate, margin above serrulate. 
Eyes elliptie, black, nearer together than the longer diameter. Antenna 1 scarce- 
ly reaching end of penultimate joint of pedunele of antenna 2. Antenna 2 less 
than half as long as body, pedunele stout, ultimate joint longer than penultimate, 
flagellum shorter than peduncle, tapering rather conspicuously, 12—15-jointed, 
strikingly flattened. Gnathopod 1 in JS, 5 and 6th joints both strongly 
produced distally on hind margin, the 6% rather the more stoutly and a 
little downward, finger matching apieal margin. Gnathopod 2 in C, 24 joint 
not widened distally, 6% rather large, broad, palm more or less oblique, 
smoothly convex or having near the finger-hinge a broad spinulose convexity, 
followed by a much smaller lobe between 2 little notches, the long curved 
finger closing down with a narrow apical piece into the pocket adjoining 
the 24 notch. Gnathopod 1 in O, 5tk joint a little subapically widened, 
6'k slightly narrowed distally, with a feebly developed palm, which is 
overlapped by the finger. Gnathopod 2 in oO, 24 joint laminar, the expansion 
narrowing distally, 5% with free part of hind margin evenly convex, 6! not 
much shorter than 5%, the minute finger slightly oblique. Peraeopod 2, 
finger abruptly narrowed at the nail. Peraeopods 3—5, 4 joint thick, 
5th joint in peraeopods 4 and 5 also thick, but without any great widening. 
Branchial vesicles of gnathopod 2 extremely sinuous. Uropod 1, apical spines 
on both rami, marginal only on one. Uropod 2 stout. Uropod 3, ramus 
rather shorter than pedunele. Telson spinulose. Colour dull greyish brown 
(Kroyer). L. 10—15 mm. 

Banks of Rio de la Plata (N. W. of Montevideo); Atlantie coasts of North-America 
(from Bay of Fundy to New Jersey); Bermudas; Mediterranean; Lake of Tiberias [Palestine]. 


21. O.sulensoni Stebb. 1899 O.s., T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 v».7 p.400 t.30C. : 


Oo unknown. — 9. Integument (in spirit) membranaceous, iridescent. 
Side-plates not deep. Pleon segment 3, postero-lateral corners quadrate, 
point scarcely produced. Eyes not very large. Antenna 1, 1° joint at least 
as broad :as long, 24 and 39 each slightly longer, flagellum with 4 joints, 
together about as long as 34 joint of pedunele. Antenna 2, peduncle stout, 
ultimate joint rather longer than penultimate, flagellum shorter than peduncele, 
18—21-jointed. Gmathopod 1, 4% joint without apical process, 5tt with 
prominent, narrowly rounded, distal pellueid process, 6!" oblong, widening 
very slightly to the palm, which has no conspicuous process and is over- 
lapped by the finger. Gnathopod 2, 24 joint comparatively slender, 5'" very 
small, completely masked by 4", 6tk very large, fringed with spinules on 
the hind margin, widening to the palm, which is moderately oblique, spinuloge, 
smoothly convex between a blunt defining tooth and a deep depression near 
the finger-hinge, the depression corresponding with a rounded process of the 
finger’s inner margin. Peraeopod 1 conspieuously longer than peraeopod 2, 
both slender. Peraeopod 2, finger short, with 2 notches. Peraeopods 3 
and 4, 24 joint oval. Peraeopod 5 having its 24 joint considerably larger, 


and the oval modified by the straightness of its hind margin, the remaining 


joints slender. Uropod 1, upper ramus with lateral spines, rather shorter 
than lower ramus, which has no lateral spines. Uropod 2, rami equal, both 
with lateral spines. Uropod 3, ramus not half as long as pedunele. L. 10 mm. 


Madeira? 


22. O. parvispinosa M. Weber 1892 O.p., M. Weber, Reise Niederl. O.-Ind., 
v.2 p. 566 f.17—19. 


542 Orchestia 


Q. Pleon segment 3 as in O. floresiana (p. 539), with postero-lateral 
corners less produced. Eyes round, as far apart as the diameter. Antenna 1, 
flagellum shorter than pedunele, 3-jointed. Antenna 2 about '/, as long as 
body, flagellum 11—-13-jointed. Gnathopod 1 said to be nearly as in 
O. floresiana, but figure gives 6% joint more narrowed apically, with longer 
finger. Gnathopod 2, 4 joint distally lobed,. 5tt narrow at base, distally 
widened into a lobe, 6% rather narrowly produced beyond the very oblique 
palm. Peraeopod 5, 24 joint broadly expanded, with few spinules on hind 
margin. Uropod 1, rami shorter than peduncle, both with lateral as well 
as apical spines. Uropod 3, conical ramus only half as long as peduncle, 
with long apical spine. L. 8 mm. — J unknown. 


Java (Mount Salak, at 1575 m height). Under stones and decaying timber. 


23. O. montana M. Weber 1892 O. m., M. Weber, Reise Niederl. O.-Ind., v.2 
p. 567 f.20-—22. 


Pleon segment 3, postero-lateral corners obtusely produced. Eyes 
roundish, less than the smaller diameter apart. Antenna 1, flagellum shorter 
than pedunele, 4-jointed. Antenna 2 '/, as long as body, flagellum as 
long as peduncle, 12—15-jointed. Gnathopod 1, 5t% joint longer than 6t%, 
free part of hind margin convex, not lobed, 6% oblong, comparatively broad, 
slightly widened distally, finger matching the transverse palm. Gnathopod 2, 
4! and the long 5t" joint distally lobed; 6! also long, rather narrow, 
produced much beyond the small, oblique palm. Peraeopod 5, 24 joint broadly 
expanded, serrate, spinulose. Uropod 1, outer ramus with only apical spines. 
Uropod 3, ramus conical, smaller than peduncle, with only apical spines. 
L. 12 mm. — | unknown. 


South Celebes. Under stones and fallen leaves, at 1150 m height. 


O. beaucoudraii (M.-E.) 1830 Talitrus b., H. Milne Edwards in: Ann, Sei. 
nat., v.20 p.364 | 1862 Orchestia b., O. littorea (part.: 2)?, Bate, Cat. Amphip. Brit. 
Mus., p. 369. 


Bay of St. Malo (Chausay Islands). 


O. constricta A. Costa 1857 O.c., A. Costa in: Mem. Acc. Napoli, v.1 p.183 | 
1862 O. mediterranea (part.) (O. constructa), Bate, Cat. Amphip. Brit. Mus., p. 24 | 1866 
O. montagui (err., non Audouin 1826?), Cam. Heller in: Denk. Ak. Wien, v.26u p.3 | 
1868 O. bottae (err., non Milne Edwards 1840?), Czerniavski in: Syezda Russ. Est., Syezda 1 
Zool. p.117 | 1893 O. chilensis (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 509. 


ö. Peraeopod 5, 4th and 5th joints not dilated. L. 22 m. 
Adriatie (Terra d’Otranto). _ 
O.inaequalis Heller 1861 O.i., Cam. Heller in: SB. Ak. Wien, v.441 p.289 | 


1888 O.i., T. Stebbing in: Rep. Voy. Challenger, v.29 p.330 | 1893 O.i., A. Della Valle 
in: F. Fl. Neapel, v.20 p. 509. 


Anomalous O. gammarellus (p. 532) or O. montagui (p.533). L. 16 mm. 

Red Sea. 

O. novaezealandiae Bate 1862 O.n.-z., Bate, Cat. Amphip. Brit. Mus., p. 20 
t.3 f.5 | 1881 O. sylvicola (err., non J. D. Dana 1852!), G. M. Thomson in: Tr. N. 


Zealand Inst., v.13 p.208 ete. | 1893 O. DEE (part.)?, A. Della Valle in: F. Fl. 
Neapel, ©.20 p.510. 


2. Gnathopod 1, 6th joint well developed, longer than 5th. Peraeopod 3 as 
long as peraeopod 4 or 5, 2d joint long. L. about 6 mm. 


New Zealand. 


a ee a al a a a a Fe 
BEN 

Ss 

/ 


; 
| 
3 
F 
ER 


Örchestia, Talorchestia 543 


O. ochotensis F. Brandt 1851 O, o., F. Brandt in: Bull. phys.-math. Ace. 
St.-Pötersb., «.9 p.140 | 1851 O.o., F. Brardt in: Middendorff, Reise Sibirien, v. 21 
p- 74 t.6 f.18—26 | 1862 O.o., Bate, Cat. Amphip. Brit. Mus., p.369 t.1a f.9 | 1893 
O. gammarellus (part.). A. Della Valle in: F. Fl. Neapel, 0.20 p.499. 

L. 12 mm. 


Sea of Ochotsk. 


O. rectimana Dana 1852 O.r., J.D. Dana in: P. Amer. Ac., v.2 p.203 | 1853 
& 55 O. tahitensis, J. D. Dana in: U. S. expl. Exp., v.13u P. 877; t.59 f.5a—g | 1862 
O.t., Bate, Cat. Amphip. Brit. Mus., p. 33 t.5 £.8. : 


Perhaps a species af Talorchestia. L. 2 6-8 mm. 
Tahiti. In damp places at 457 m above sea-level. 


5. Gen. Talorchestia Dana 


1847 Scamballa (part.), (Leach in MS.) A. White, Crust. Brit. Mus., p.86 | 1852 
Subgen. Talorchestia, J. D. Dana in: Amer. J. Sei., ser.2 v.14 p.310 | 1853 Subgen. 
T., J. D. Dana in: U. S. expl. Exp., v.13u p. 851 | 1857 T., 
Bate in: Ann. nat. Hist., ser.2 v.19 p.135 | 1888 T7., T. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 257, 262 | 1891 7., T. Stebbing 
in: Ann.nat. Hist., ser. 6 v.8 p.328|1893 T'., Chevreuxin: Bull. Soc. 
zool. France, v.18 p.127|1885 Talorchestes, Thalorchestia, Filhol 
in: Recu. Passage Venus, v.31 Zool. p.459, 461; Planches p. 28. 


Like Orchestia (p.530), except that gnathopod 1 in O 
(Fig. 94) is simple, instead of subchelate. Peraeopod 2 


‚usually has the inner margin of the finger more sharply FR RN, 
constrieted than in allied genera. Gnathopod 1. 


Sea-shores, 'widely distributed, generally in sand. 
19 accepted and 2 doubtful species. 


Synopsis of accepted species: 
Gnathopod 2 in J, palm defined by tooth or 
process — 2. 


Gnathopod 2 in d, palm without defining 
tooth or process — 12. 


1 


Peraeopod 5, 2d joint exceptionally expanded 1. T. scutigerula. . . . p.544 
Peraeopod 5, 2d joint not exceptionally expan- 
ded — 3. 


2 


Gnathopod 2 in d having a very deep palmar 
cavity — 4. 

Gnathopod 2 in not having a very deep 
palmar cavity — 5. 


Gnathopod 2 in d, defining tooth of palm 
° | 


3 


immensely long A RE EB LE TA 2. T.darwini...- - - p- 545 
Gnathopod 2 in S, defining tooth of palm . 
not immensely long . . ..2...... 3. T. deshayesii . . . . p.545 


Gnathopod 2 in 3, palm defined by 2 teeth — 6. 
Gnathopod 2 in d, palm defined by a single 
tooth — 7. 


Gnathopod 2 in d, palm with a tooth in 

addition to the defining teeth . .. . . 4. T.tridentata . -. . . p.546 
Gmnathopod 2 in d, palm without tooth ad- 

ditional to the defining teeth. .... . 5. T. pravidactyla. . . p.546 


5 


44 Talorehestia 


Gnathopod 2 in d, finger with great pro- 


tuberance on inner margin. . .». .. . a 3 0 p- 547 
Gnathopod 2 in d, finger without great pro- 
tuberance on inner margin — 8. 
Gnathopod 2 in d, palm with tooth near 
finger-hinge a nn ae 7. T.quoyana...... p- 547 
Gnathopod 2 in g, RE without tooth near 
finger-hinge — 9. 
9 Gnathopod 2 in d, 6th joint subquadrate. . 8. T. quadrimana . . . p.548 
Gnathopod 2in 3, 6th joint not subquadrate — 10. 
Gnathopod 1 in 9, finger shorter than apex 
of Bih Soink. 2.20 sa te eh 9. T. diemenensis . . . p.548 
Gnathopod 1 in d, finger not shorter than 
apex of 6th joint — 11. 
Eyes unusually large, antenna 2 of moderate 
11 5 length. 0. we nu en 10. T. megalophthalma . p. 549 
Eyes of moderate size, antenna 2 elongate . 11. T.longicornis. . p- 549 
oJ Gnathopod 1 in d chelate ......... 12. T. pollieifera . . . . p.550 
3 Gnathopod 1 in & subchelate — 18. 
Peraeopod 4 in 3, 4th and 5th joints expanded 
Bey ne N u 18. D.timida. : 7... p. 550 
Peraeopod 4 in d, 4th and 5th joints not 
expanded greatly — 14. 
Peraeopod 5 in d, 5th joint enormously ex- 
DRnaod, 2 7m ein Sees 14. T.telluriss . .. . . p. 551 
Peraeopod 5 in g, 5th joint not enormously 
expanded — 15. 
15 Peraeopods 3-—5, 2d joint little expanded. . 15. T.graeilis ... . - p- 551 
Peraeopods 3— 5, 24 joint well expanded --16. 
Gnathopod 2 in Z with process of the palm 
near Anger-kinae: - 7.2, N, 16. T. spinipalma. . . . p.552 
Gnathopod 2 in S, without process of the 
palm near finger-hinge — 17. 
17 Gnathopod 2 in 8, palm very oblique ... . 17. T. brito. Be p- 552 
Gnathopod 2in 3, palm not very oblique —18. 
Gnathopod 2 in d, palm excavate near finger- 
Dinbesi. on I 18. T. novaehollandiae . p. 558 
Gnathopod 2 in d, palm not excavate near . 


Dupermhinge 5 u. nen an 19. T. martensi . . . . p.553 


1. T. scutigerula (Dana) 1853 & 55 Orchestia s., J. D. Dana in: U.S. expl. 
Exp., v.1311 p. 863; 1.58 f.2 | 1862 O. s., Bate, Cat. Amphip. Brit. Mus., p. 26 t.4 £.7| 
1893 O.s., A. Della Valle in: F. Fl. Neapel, v.20 p. 497 t.57—60. 


Body rather compressed. Side-plate 1 in d more quadrate than usual, 
and not much overlapped by side-plate 2, 4! rather large, much deeper 
than 5, Pleon segment 3, postero-lateral corners acutely quadrate. Eyes 
small, round, dark, farther apart than their width. Antenna 1 reaching end 
of penultimate joint of peduncle of antenna 2 or beyond it, joints of pedunele 
very short, flagellum 5-jointed. Antenna 2 from '/,—"/, as long. as body, 
ultimate joint of peduncle not nearly twice as long as penultimate, flagellum 
rather longer than peduncle, about 15—18-jointed. Gnathopod 1'in d, 5th 
joint not greatly longer than 6#h, its subapical process well developed, 6th 
with process so well developed that the finger only reaches the end without 


Talorchestia 545 


overlapping. Gnathopod 2 in J, 5b joint extremely small, 6!" massive, 
palm well defined, almost transverse, with a triangular tooth very near the 
finger-hinge, or in the form deseribed by Dana rather near the centre, finger 
well arched, inner margin slightly projeeting where it meets the palmar 
process. Gnathopod 1 in Q, 6*% joint too much narrowed distally to make the 
limb subehelate. Gnathopod 2 in Q, 6% joint nearly as long as 5, pro- 
duced beyond the small finger. Peraeopod 2 with the usual notch in the 
finger. Peraeopod 3, 24 joint rather squarely rounded. Peraeopod 4, 24 joint 

similar to that of peraeopod 3 but larger. Peraeopod 5 longer and stouter than 
peraeopod 4, 24 joint with elliptic shield-like hinder expansion produced above 
the side-plates and also downward, but much narrower in O than in d. Telson 
not longer than broad, D-shaped. Colour greenish brown. L. 18—21 mm. 


Nassau Bay (Tierra del Fuego), among cast up sea-weed; South-Atlantie (Hermit 
Island; Falkland Islands). 


2. T. darwinii (Fr. Müll.) 1864 Orchestia d., Fritz Müller, Für Darwin, p. 16 
£.7—9 | 1893 O. deshayesii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 507. 


a 9 unknown. — d. Side-plate 1 is very small, side-plate 2° much 
e larger than any of the others. Eyes rounded, black. Antenna 1 very small, 
\ not reaching middle of penultimate joint of pedunele of antenna 2; antenna 2, 
ultimate and penultimate joints of peduncle equal, flagellum subequal to pedunele, 
13-jointed. Gmathopod 1, 5tk and 6" joints apically dilated, finger shorter 
than apex of 6tk joint; gnathopod 2, 34 joint lobed in front, 5! very small, 
6 very large, in younger J having the palm almost chelately produced 
with bilobed ending, the blunt finger with strong median lobe, the apex 
slightly overlapping palm, in elder Ö the hind margin produced into a long 
tooth slightly beyond finger-hinge, from which it is separated by a deep and 
wide triangular cavity, the finger broad and straight with a blunt sort of 
hook overlapping end of above-mentioned tooth. Peraeopods 3 and 4, 24 joint 
narrow, peraeopod 5 longer than the preceding peraeopods, with much broader 
2° joint, other joints slender. L.? (Description based on Müller’s drawings.) 


Brazil. Near the shore, under leaves, dung, and the loose earth thrown up 
by burrowing erabs. 


3. T.deshayesii (Aud.) 1826 Orchestia d., Audouin in: Deser. Egypte, v.lıv p.93 
Orust. t.11 £.8 | 1847 O.d. (Scamballa kuhliana Leach in MS.), A. White, Crust. Brit. 
Mus., p.86 | 1866 O.d., Cam. Heller in: Denk. Ak. Wien, v.2611 p.3 t.1f.5, 6 | 1868 O.d., 
Czerniavski in: Syezda Russ. Est., Syezda 1Zool. p.131 t.8 f.52, 53 | 1887 O.d., T. Barrois, 
Note Orchesties, p.6 £. | 1893 ©. d. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.507 
t.2 .5; 1.15 f. 15—30; t.57 £.70-—73 | 1893 Talorchestia d., Chevreux in: Bull. Soe. 
zool, France, v.18 p.127 f. | 1899 T. d., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 
v.7 p.400 t.304 | 1848 Orchestia gryphus, Friedr. Müller in: Arch. Naturg., v.141 p.57, 
62 1.4 f.18, 28 | 1888 O.g., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 226, 421. 


Back moderately broad, peraeon segment 1 longer than 24. Side-plates 
shallow, 1° less deep and narrower than the following 4; 5'" in front about 
as deep as 4th. Pleon segment 3, postero-lateral corners sharply quadrate. 
Eyes rounded, dark, often wider apart than their width. Antenna 1 some- 
times not reaching end of penultimate joint of peduncle of antenna 2, 24 
joint subequal to 1°, flagellum shorter than peduncle, 5- or 6-jointed. An- 
tenna 2 very variable, ultimate joint of peduncle sometimes 2'/,, times as 
long as penultimate, flagellum shorter than peduncle, with about 20 joints, 
most of them carrying calceoli (Barrois). Maxillipeds, palp with a rudiment 
of 4 joint (Della Valle). Gnathopod 1 in JS, 5th joint at apex of hind 


Das Tierreich. 21.Lief.: T. R. R. Stebbing, Amphipoda 1. 35 


546 Talorehestia 


margin with conspicuous pellueid process, 6% joint shorter, with similar but 
stouter process, finger with sinuous inner margin, a little overlapping palm. 
Gnathopod 2 in C, 4 and 5tk joints very short, 6! very long, hind margin 
produced almost from the base into a curved tooth, within which the long 
finger closes, leaving a cavity between its concave inner margin and the 
long oblique, almost straight palm; the main part of the hand has a conical 
shape, the palm and front margin being comparatively little divergent. 
Young 9 (Barrois, Heller, Czerniavski?) has the hand of gnathopod 2 with 
a palm chelately produced, or excavate at right angles to the hind margin, 
or more or less oblique. Gnathopod 1 in Q without processes on 5tl and 6th 
joints, 6! at apex but little stouter than base of finger. Gnathopod 2in oO, 
24 joint wider above than below, 5! wider proximally than distally, 6th 
shorter than 5tk. Peraeopods 1—5 very spinose, in general nearly as in 
T. quoyana. Uropod 3, ramus shorter than peduncle Telson obtusely 
triangular, slightly emarginate, spinulose. Colour light brownish yellow, with 
rows of darker spots; sometimes dorsum carmine red. L. reaching 15 mm. 


European coasts from Baltie and England (in Devon only in sand) to the Black 
Sea; Egypt. ; 


4. T. tridentata Stebb. 1899 7. t., T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 ©.7 p.398 t. 302. 


Body not very broad. Side-plates 1—4 scabrous, quadrate, 24—4th 
deeper than 1%. Eyes roughly oval, rather more than their longer diameter 
apart. Antenna 1 very small, not reaching middle of penultimate joint of 
peduncle of antenna 2. Antenna 2 about '/, as long as body, ultimate joint 
of peduncle twice as long as penultimate, flagellum scarcely as long as 
peduncle, flattened, with about 24 short transverse joints. Gmnathopod 1 
in d spinose, 5tk joint long, the subapical pellueid process narrow, very 
prominent, 6t% joint rather narrow, the apical pellueid process prominent, 
finger with sinuous inner margin, extending beyond the process of 6! joint. 
Gnathopod 2 in C, 24 joint channelled, apices of front scarcely lobed, 5th 
joint diminutive, 6 very large, hind margin fringed with spinules, palm 
oblique, having near the finger-hinge a large triangular spinulose tooth, 
followed by a sinuous slope, and defined from hind margin by 2 teeth side 
by side, finger very large, with swelling near the hinge, and beyond. this 
the concave margin fringed with small spinules. Peraeopod 2 much shorter 
than peraeopod 1, finger with strong prominence near base of nail. Peraeopod 3 
very short, 24 joint nearly as broad as long. Peraeopods 4 and 5 not very 
elongate, but much longer than peraeopod 3. All peraeopods spinose, with 
rather small branchial vesicle. Uropod 1 long, rami much shorter than 
peduncle, both with marginal spines. Uropod 2, rami not shorter than peduncle, 
stoutly spined. Uropod 3, ramus as long as pedunele or longer. Telson 
short, spinulose. L. 11 mm. 


North-Pacifie (California). 


5. T. pravidactyla Hasw. 1880 7. »p., Haswell in: P. Linn. Soe. N. S. Wales, 
v.5 p.100 t.5 £.5. 


Body stout. Eyes small, round, black, wide apart. Antenna 1 reaching 
beyond penultimate joint of peduncle of antenna 2, flagellum in Q 7-, n 9 
10-jointed. Antenna 2 in S more than thrice as long as antenna 1, ultimate 
joint of peduncle more than twice as long as penultimate, flagellum as long 


: 
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3 
= 
B 

a 

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a nt u a aa 


le a 


Talorchestia 547 


as ultimate joint of peduncle, 21-jointed. Antenna 2 in © much smaller than 
in d, 15-jointed. Gmathopod 1 in Q', 6% joint rather long, widening a little 
distally, hind margin produced into a short narrow process, palm transverse, 
concave, finger rather longer than palm. Gmathopod 2 in J, 6!" joint large, 
palm oblique, defined by a blunt tooth, with a second tooth elose to it on 
the distal side, and a rounded elevation about the middle; finger geniculate, 
its apex lying between the two palmar teeth when the hand is closed. 
Whether the palmar teeth are side by side or successive is left indefinite 
by the figure, which in fact shows neither of them. Gnathopod 1 in oO, 
5th joint much longer and broader than the narrow 6%, which has a pellucid 
process too small to give the limb a subchelate character. Gnathopod 2 
in ©, 6tk joint thrice as long as broad, not much produced beyond the 
finger. Peraeopods 1—5 spiny and robust, peraeopods 3—5, 24 joint broadly 
rounded, in peraeopod 5 very broad and somewhat produced downward. 
Uropods 1—3 and telson plentifully furnished with marginal and apical spines 
and spinules.. L. 15—17 mm. | 
South-Paeifie (Tasmania). ı 


6. T.limicola Hasw. 1880 7.1, Haswell in: P. Linn. Soe. N.S. Wales, 0.5 
p-98 t.5 f.2 | 1893 Orchestia l., A. Della Valle in: F. Fl. Neapel, v.20 p. 505 t.57 £.64. 


Antenna 1 very short, flagellum 5-jointed. Antenna 2 four times as long 
as antenna 1, flagellum as long as peduncle, 12-jointed. Gnathopod 1 in JG, 
5th joint with large subapical process, 6" oblong with distal widening, palm 
transverse, slightly overlapped by finger. Gnathopod 2 in S, 6!" joint large, 
broadly oblong, palm transverse, defined by a broad, apically notched tooth, 
followed by an excavation to match the great central process of the broad 
but pointed finger. Gnathopod 1 in ©, 5t* joint little longer than 6%, which 
narrows to an apex not broader than base of finger. Gnatbopod 2 in ©, 
5th and 6th joints subequal, 6% produced considerably beyond the longitudinal 
finger. L. 9 mm. 


Queensland (Bowen). In Mangrove swamps, under decaying wood, etc. 


7. T. quoyana (M.-E.) 1840 Talitrus brevicornis + Orchestia q., H. Milne 
Edwards, Hist. nat. Crust., v.3 p.15,19 | 1840 O.g., H. Milne Edwards in: G. Cuvier, 
Rögne an., ed.3 Crust. 1.59 f.4 | 1895 O.g., A. Della Valle in: F. Fl. Neapel, v.20 
p- 506 t.57 f.68.| 1886 Talorchestia q.,, G. M. Thomson & Chilton in: Tr. N. Zealand 
Inst., v.18 p.146 | 1852 Talitrus novi-zealandiae, J. D. Dana in: P. Amer. Ac., v.2 
p. 201 | 1858 & 55 Orchestia (Talitrus?) n. + T. brevicornis + O. (Talorchestia?) 
quoyana, J. D. Dana in: U.S. expl. Exp., v. 1311 p. 852 t.56 f.5; p.854 1.56 1.6; 
p-863 t.58 f.1 | 1862 Talitrus b., Orchestia b. + Orchestoidea? n. + Talorchestia q., 
Bate, Cat. Amphip. Brit. Mus., p.9 t.1a f.6; p.10 t.1£.2; p.16 t.2 £.7 | 1885 Tal- 
orchestia armata, Thalorchestia a., Filhol in: Recu. Passage Venus, v.311 Zool. p. 460 
t.53 £.3; Planches p. 28. 


Back broad. Side-plate 1 produced forward with rounded angle and 
straight front margin, side-plates 2—4 quadrate, successively broader, 5tk 
less deep than 4. Pleon segment 3, postero-lateral corners quadrate, with 


the hind margin finely serrulate. Eyes dark, irregularly rounded, scarcely 


their own width apart. Antenna 1 reaching little beyond penultimate joint 
of pedunele of antenna 2, 1° and 24 joints subequal, each longer than 34, 


flagellum shorter than peduncle, 8-jointed. Antenna 2, ultimate joint of 


peduncle in S twice as long as penultimate, less in Q, flagellum subequal to 
peduncle, with about 30 joints, 27 in Q, 29 ind. Upper lip distally rather 
narrowly rounded, inner plate with flat distal margin. Maxilla 1 with minute 
2-jointed palp. Maxillipeds, 24 joint of palp very broad. Gnathopod lin cC, 


35* 


548 Talorchestia 


24 joint channelled in front, 5!" much longer than 6t, not lobed, 6tk very 
spinose, distally lobed, palm straight, not oblique, finger reaching beyond it. 
- Gnathopod 2 in d, 24 and 34 joints channelled in front, 4!" short, square, 
5th very short, eup-shaped, 6'% massive, palm oblique, spinulose, with broad 
rectangular tooth near finger-hinge, and prominent acute defining tooth, 
within which the finger eloses. Gmnathopod 1 in 9, 6!k joint narrowing to 
the finger, distally scarcely broader than base of finger, densely spinose. 
Gnathopod 2 in Q, 24 joint elongate oval, 34 and 4th subequal, 5!" longer 
than 6, the part free from 4 narrowly oval, 6!" produced with rounded 
end beyond the small chela-forming finger. Peraeopod 2 shorter than 
peraeopod 1, finger notched, and that in both sexes. Peraeopod 3 very 
short, 29 joint almost eircular, 4% and 5th short but rather broad. Peraeo- 
pod 4 long, 24 joint broadly oval. Peraeopod 5 rather longer, 24 joint as 
long as in peraeopod 4 but much wider, the broad crenulate expansion 
giving it a eircular look; 4— 7! joints in peraeopods 4 and 5 long, not 
especially widened. Pleopods with small rami, shorter than pedunele, 
4- or 5-jointed. Uropods 1 and 2 spinose, rami ending obtusely, outer 
rather the shorter. Uropod 3, the small ramus a little longer than the 
peduncle. Telson thick, broader than long, faintly emarginate, surrounded 
with spinules, and looking as if its distal angles were upturned. L. reaching 
23 mm. 


South-Paeifie (New Zealand). 


8. T. quadrimana (Dana) 1852 Orchestia q., J. D. Dana in: P. Amer. Ac., 
c.2 p.204 | 18535 & 55 O.g., J. D. Dana in: U.S. expl. Exp., 0.1311 p.879; 1.59 £.7| 
1893 O. q., A. Della Valle in: F. Fl. Neapel, v.20 p.504 t.57 £.63 | 1879 Talorchestia q., 
Haswell in: P. Linn. Soc. N. S. Wales, v.4 p.248 t.7 f.3 | 1880 T'. q. var.?, Haswell in: 
P. Linn. Soe. N.S. Wales, v.5 p. 100 t.6 £.1. 


Side-plates 2—4 broad. Eyes large, round. Antenna 1 reaching 
end of penultimate joint of peduncle of antenna 2. Antenna 2, ultimate 
joint of peduncle not much longer than penultimate, flagellum subequal to 
pedunele, joints not longer than broad. Gnathopod 1 in 9, 6! joint little 
shorter than 5tk, subtriangular, the expanded distal margin a little excavate, 
not overlapped by the finger. Gnathopod 2 in JS, 6!" joint stout, subquadrate, 
palm transverse, slightly excavate. Peraeopods 1 and 2 slight in structure. 
Peraeopods 3—5 successively longer, only the 24 joint expanded and this in 
peraeopod 5 (Haswell) much broader than that of the others. Uropod 1, 
outer ramus unarmed. Uropod 3, ramus slender. Colour white, with irregular 
light-red spots. L. 12—14 mm. 


South-Paecifie (New South Wales, Queensland, Port Denison). On sandy beaches, 
under east up weed above the reach of ordinary tides. 


9. T. diemenensis Hasw. 1879 T.d., Haswell in: P. Linn. Soc. N. S. Wales, 
v4 p.248 t.7 f.6 | 189 T.d., G.M. Thomson in: P.R. Soc. Tasmania, 1892 p.17 
t.5 f.6—8 | 1893 T. d., A. Della Valle in: F. Fl. Neapel, v.20 p. 512 | 1891 Orchestia d., 
T. Stebbing in: Ann. nat. Hist., ser. 6 v.8 p.325 | 1898 O. gammarellus, G. M. Thomson 
in: Tr. N. Zealand Inst., v.81 p. 198. 


Antenna 1 very sbort. Antenna 2, flagellum as long as peduncle. 
Gnathopod 1 in JS, 5tk joint distally broad, 6tk oblong, twice as long as- 
broad, palm transverse, slightly sinuous, finger short, in figure not nearly as 
long as apex of 6th joint. Gmathopod 2 in JS, 6% joint (in figure) nearly 
as broad as long, palm convex, moderately oblique, defined by a rounded 
tooth. Gnathopod 1 in ©, 5tt and 6! joints narrower than in J, the palmar 


u) ia 


4 

E: 
p; 
. 


ne a a a a sr 3 ya Ba 1 a En En Be Ben 


Talorchestia 549 


border with a deep median notch, the finger well developed (Haswell); 
gnathopod 1 in © simply unguiculate (Thomson). Gmnathopod 2 in ©, 
5th and 6th joints subequal, 6% produced some way beyond the minute, 
obliquely placed finger. Telson triangular, blunt. L. 6--13 mm. 


South-Paeifie (Tasmania). Under stones in estuaries. 


10. T. megalophthalma (Bate) ?1844 Talitrus quadrifidus, De Kay, Zool. 


-N.-York, 0.6 p.36 t.14 f.27 | 1847 Orchestia megalophthalmus (Scamballa m. Leach in 


MS.) (nom. nud.), A. White, Crust. Brit. Mus., p. 86 | 1851 O. megalophthalmos (nom. nud.), 
F. Brandt in: Bull. phys.-math. Ac. St.-Petersb., v.9 p.142 | 1862 O. megalophthalma, Bate, 
Cat. Amphip. Brit. Mus., p.22 t.3 f.8 | 1895 O. m., A. Della Valle in: F. Fl. Neapel, 
v.20 p.496 t.57 f.54 | 1873 Talorchestia m., (8. I. Smith in:) A. E. Verrill in: Rep. 
U.S. Fish Comm., v.1 p. 556. 

Very near to T. longieornis, but back still broader, eyes far larger, 
these being of exceptional size and only separated by half their width 
or less, antenna 2 shorter (?), and 6 joint of gnathopod 2 in the JS with 
long palm, scarcely oblique, gnathopod 2 in the O with 4% joint strongly 
produced at lower hind angle; uropod 3, ramus less strongly spined. L. 19 mm. 

North-Atlantie (from Cape Cod to New Jersey [North America]). 

11. T.longicornis (Say) 1818 Talitrus l., Say in: J. Ac. Philad., o.1ır p.384 | 


1830 Orchestia l., H. Milne Edwards in: Ann. Sei. nat., v.20 p.361 | 1844 O.1., De Kay, 
Zool.N.-York, 0.6 p.85 t.9 f.28, 28a | 1847 O.1. (Scamballa I. Leach in MS.), A. White, 


“ 'Crust. Brit. Mus., p. 86 | 1862 O.1., Bate, Cat. Amphip. Brit. Mus., p.18.t.3 f£.1 ! 1893 


O.1., A. Della Valle in: F. Fl. Neapel, v.20 p.505 t.57 £.66, 67 | 1851 O.1., Megal- 
orchestes?, Megalorchestia? l., F. Brandt in: Bull. phys.-math. Ace. St.-Pötersb., v.9 p. 142, 
312 | 1873 Talorchestia l., (S. 1. Smith in:) A. E.Verrill in: Rep. U.S. Fish Comm., ©. 1 p. 556. 


Back broad. Side-plate 1 little produced, narrow, as deep as the 24, which 
is slightly emarginate behind, 5t® not so deep as 4!" but broader. Pleon 
segment 3, postero-lateral corners quadrate. Eyes oval, narrowed above, or 
irregularly rounded, about as far apart as their smaller diameter, dark. An- 
tenna 1, peduncele about reaching end of penultimate joint of pedunele of 
antenna 2, 24 joint of peduncle rather longer than 1% or 34, flagellum 
short, 6-jointed. Antenna 2, ultimate joint of pedunele more than twice as 
long as penultimate, flagellum in a © speeimen nearly as long as peduncle, 
22-jointed. Maxillipeds with no unguiculate terminal joint. Gmathopod 1 
in 9, 5% joint with subapical pellucid process outward, 6!" much shorter 
and narrower, oblong, with slight distal widening into a pellucid process, 
finger with smooth inner margin, a little overlapping palm. Gmathopod 2 
in C, 24 joint abruptly widened from narrow base, 34 larger than 4% or 5th, 
6% massive, widening to the palm, which is only a little oblique, defined by 
a very blunt tooth, between which and the hinge is a eonvex swelling of the 
palm, or a eonsiderably concavity (in G speeimen 25 mm long, Bate) or a large 
rounded tooth between 2 cavities (Milne-Edwards). Gnathopod 1 in oO, 5 
and 6!» joints without the pellucid processes, 6!" narrowing to the finger- 


‚hinge, being there little wider than base of finger. Gmathopod 2 in O, 


24 joint broadiy and irregularly oval, membranaceous, 4! quadrate, not 
produced, 5th a little longer than 6*%, free part of hind margin very convex, 
6 elongate, produced much beyond the minute chela-forming finger. 
Peraeopod 2, finger rather slender, deeply notched. Other peraeopods much 
as in T. quoyana (p. 547). - Uropod 1, rami equal. Uropod 2, outer ramus 
the shorter. Uropod 3, ramus longer than peduncle. Telson obtusely triangular, 
slightly emarginate, with spinules at the 2 points thus formed; a transverse 


550 Talorchestia 


plate only partially free and not reaching the apex is truncate with small 
median slit. Colour pale greyish, or sand-coloured. L. reaching 25 mm 
and over. 


North-Atlantie (from Cape Codto New J ersey [North America]). Burrowing in sand. 


12. T. pollieifera (Stimps.) 1855 Orchestia p., Stimpson in: P. Ac. Philad., 
v.7 p.883 | 1857 O. p., Stimpson in: Boston J. nat. Hist., v.6 p.517 | 1862 Talorchestia 
p-., Bate, Cat. Amphip. Brit. Mus., p.16 | 1893 Orchestia gammarellus (part.)?, A. Della 
Valle in: F. Fl. Neapel, v.20 p. 510. 


Eyes rather small, round, black. Antenna 1 in O reaching end of 
penultimate joint of pedunele of antenna 2. Antenna 2 in S stout, peduncle 
twice as long as flagellum. Antenna 2 in O slender, flagellum 12-jointed. 
Gnathopod 1 in J, pellueid process in joint 6 rather unusually produced. 
Gnathopod 2 in JS, 6% joint ovate, of moderate size. Gnathopod 1 in Q simple. 
Gnathopod 2 in O with small hands, having a minute lateral finger. Caudal 
stylets (uropod 3?) short, rami subeonical. Colour pale brownish. L. 15 mm. 


North-Pacifie (Loo Choo). 


13. T. tumida G.M. Thoms. 1885 7. t., G.M. Thomson in: N. Zealand J. Sei., 
v.2 p.577 | 1887 T.t., T. Stebbing in: Tr. zool. Soe. London, v.12vı p.202 1.39 f.A | 
1888 T.t., G. M. Thomson in: Tr. N. Zealand Inst., v.21 p.260 t.13 f.4—8 | 1898 
Orchestia t. (part.), G.M. Thomson in: Tr. N. Zealand Inst., v.31 p.203 | 1893 O. gam- 
marellus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 501. 


Back broad. Side-plate 1 almost concealed by the broader side-plate 2, 
4th the widest, irregularly quadrate, deeper than 5tk, Pleon segment 3, 
postero-lateral corners quadrate. Eyes large, round, less than their own 
width apart, turquoise-blue. Antenna 1 a little overlapping penultimate joint 
of peduncle of antenna 2, all 3 joints of pedunele very short, flagellum 
shorter than peduncle, 7- or 8-jointed in O0, 5-jointed in 9. Antenna 2 
less than '/, as long as body, ultimate joint of pedunele about twice as 
long as the short penultimate, flagellum a little shorter than penultimate, 
12—15-jointed in 9, 12-jointed in ©. Upper lip distally broadly rounded. 
Maxilla 1, palp barely perceptible. Gnathopod 1 in S, 5t" joint considerably 
longer than 6%, hind margin subdistally forming a small linear lobe, 6! 
joint oblong, with squarish distal lobe, little produced outward, and over- 
lapped by the finger. Gnathopod 2 in 9, 34 joint longer than the quadrate 
4'h or the small cup-shaped 5th, 6th massive, palm oblique, very spinulose, 
with 2 deep excavations between which a stout process meets a strong 
projeetion of finger’s inner margin; in young J the palm and finger are 
simpler. Gmathopod 1 in ©, 6t% joint oval, very narrow at junetion with 
the finger which equals it in length. Gnathopod 2 in Q, 6% joint flattened, 
narrowly oval, distally produced beyond the minute chela-forming finger. 
Peraeopod 2 shorter than peraeopod 1, finger notched. Peraeopod 3, 24 joint 
subeircular. Peraeopod 4, 29 joint broadly oval, 4! expanding to the bluntly 
produced distal end, 5! abruptly widened from a narrow neck and then 
narrowing, but still at apex much wider than 6%. Peraeopod 5 shorter than 
4th, 24 joint very broad, subeireular, erenulate, other joints not specially 
widened. Pleopods, rami 7-jointed, subequal to peduncle. Uropods 1 
and 2, rami spinose, obtuse. Uropod 3, ramus longer than pedunele. Telson 
as broad as long, with spinules round apical margin. Colour ivory-white. 
L. 13 mm. 


South-Paeifice (Dunedin [New Zealand]). Sand-banks, among roots of littoral 
plants, above high-water mark. 


3 
E 


Dh Da re u EN a PEN 
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ee I a 


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a er a = ah I er FE Kae Ka ST h 
Ren a EL ET ng 
Kar 


Talorchestia 551 


14. T. telluris (Bate) 1862 Orchestia t., Bate, Cat. Amphip. Brit. Mus., p.20 
t.3 £.6; t.4 f.4 (ineluding f.2h on right) | 1886 O.t., G. M. Thomson & Chilton in: 
Tr. N. Zealand Inst., v.18 p.145 | 1893 O. gammarellus (part.), A. Della Valle in: F. 
Fl. Neapel, v.20 p. 499. 


Body rather compressed. Side-plates not very large. Pleon segment 3, 
postero-lateral corners quadrate, with little spinules in the shallow serrations 
of their hind margin. Eyes round, rather large, dark, less far apart than 
their width. Antenna 1 in S reaching rather beyond penultimate joint of 
pedunele of antenna 2, joints of peduncle short, 34 slightly shortest, flagellum 
shorter than peduncle, 5-jointed. Antenna 2 short, ultimate joint of peduncle not 
twice as long as penultimate, flagellum subequal to peduncle, with about 15 joints 
in Ö, rather fewer in ©. Gnathopod 1 in JS, 5tk joint rather longer than 
6%, with a small pellueid process at middle of free hind margin, 6% distally 
produced into a much larger process, which is a little overlapped by the 
finger. Gnathopod 2 in J, 24 joint rather slender, the next 3 as usual 
small, 6!" very large, widening to the palm, which forms a triangular tooth 
between an excavation near the finger-hinge and an oblique convexity passing 
insensibly into the hind margin; the long finger has a corresponding cavity 
near the hinge, than a broad protuberance and finally a concavity matching 
the convexity of the palm. Gnathopod 1 in oO, 5tk joint with no process, 6th 
spinose, narrowing to the finger-hinge and forming no palm, finger ?/, as long as 
6% joint. Gnathopod2 in 9, 24 joint little widened, 4 not produced at hinder 
angle, 5% with the free portion uniformly widened, 6! nearly as long as 5tk, 
subapieally widened, produced much beyond the finger. Peraeopod 2 with the 
finger as usual nötched. Peraeopod 3, 24 joint small, rounded oval. Peraeo- 
pod 4, 24 joint larger, oval, and the whole limb much longer than peraeopod 3. 
Peraeopod 5, 24 joint larger in both sexes, but especially in J, nearly eircular 
but broader below than above, 4! joint in S triangular, widening to the 
distal end, 5! joint in d expanded behind to a process comparable to a 
dish-cover and at least sometimes assuming monstrous proportions, its oval 
being much larger than the 24 joint of its own limb or than the great hand 
of gnathopod 2; 6% and 7 joints slender as in peraeopod 4. Uropod 1, 
rami equal. Uropod 2, rami equal or subequal. Uropod 3, ramus rather 
longer than peduncle. Telson triangular. L. © 9, d 12 mm. 

South-Pacifie (New Zealand, from Bay of Islands to Stewart Island). Sandy 
shores, just above tide-marks. 


15. T. gracilis (Dana) 1852 Talitrus g., J.D. Dana in: P. Amer. Ac., «.2 
p.201 | 1853 & 55 Orchestia (Talorchestia) g., J. D. Dana in: U. S. expl. Exp., v. 13u 
p-861 1.57 £.5 | 1862 T. g., Bate, Cat. Amphip. Brit. Mus., p.15 t.2 £.5 | 1898 Orchestia 
gammarellus (part.), Talitrus (part.)?, A. DellaValle in: F. Fl. Neapel, v.20 p.499, 511, 947. 


Side-plate 5 nearly as deep as 4tk. Eyes in figure rather small, round. 
Antenna 1 short, not reaching end of penultimate joint of pedunele of an- 
tenna 2, flagellum shorter than peduncle. Antenna 2 in J longer than the body, 
penultimate joint of peduncle rather long, but less than half as long as ultimate, 
flagellum longer than peduncle. Antenna 2 in © longer than half the body, 
penultimate joint of peduncle */, as long as ultimate, flagellum longer than 
peduncle. Gnathopod 1 in J, 5t% joint long, showing no pellueid process, 6 con- 
siderably shorter, distally a little widened, apex of hind margin narrow, finger 
scarcely overlapping palm. Gnathopod 2 ind‘, 6tk joint large, ovate, palm 
spinulose, oblique, convex, almost continuous with hind margin, finger long, 
adjusted to palm. Gnathopod 1 in oO rather stout, 3I—6! joints described 


552 N Talorehestia . 


as subequal, finger quite small. Gnathopod 2 in Q, 2% joint rather expanded, 
5th Jittle longer than 6", with hind margin bulging at the centre, 6th 
produced beyond the minute finger to a rounded lobe, which bends forward, 
so that the front line of the hand is slightly concave. Peraeopod 2 much 
shorter than peraeopod 1; the finger is gibbous below, or has a prominent angle 
and is stout. Peraeopods 3—5, 24 joint narrowly oval. Peraeopod 5 the 
longest. Uropod 1, outer ramus with spines only at apex. Uropod 3, pedunele 
rather longer than telson, which the ramus nearly equals. Nearly eolourless. 
L. about 12 mm. 


Coral island in the Balabae Passage. 


16. T.spinipalma (Dana) 1852 Orchestia s., J.D. Dana in: P. Amer. Ac., v.2 
p-203 | 1853 & 55 O. s., J. D. Dana in: U. S. expl. Exp., u. 131 p.875; 1.59 f.4a—e | 
1862 O. s., Bate, Cat. Amphip. Brit. Mus., p.28 t.4 f.9 | 1880 Talorchestia terrae-reginae, 
Haswell in: P. Linn. Soe. N. S. Wales, v.5 p.98 t.5 f.4 | 1893 Orchestia chilensis (part.), 
A.Della Valle in: F. Fl. Neapel, v.20 p.498 | 1898 O. chiliensis, G. M. Thomson in: Tr. 
N. Zealand Inst., v. 31 p. 199. 


Side plates not very deep, 5!" nearly as deep as 4%, Antenna 1 very 
short, flagellum 3—5-jointed (Dana) (Haswell: 6—8-jointed). Antenna 2, 
peduncle 4 times as long as antenna 1, flagellum as long as peduncle or 
shorter, 20-jointed; ultimate joint of peduncle much longer than penultimate. 
Gnathopod 1 in CS, 5tk joint longer than 6", with small apical process, 6th 
narrowly oblong, very slightly dilated at apex, palm transverse, finger over- 
lapping it. Gmathopod 2 in 9, 6'% joint large, subovate, palm spinulose, 
very oblique, ill-defined, having near the hinge a process, which fits. into a 
hollow of the elongate finger. Gnathopod 1 in ©, 5% joint longer than 6th, 
apex of which is scarcely broader than base of short finger. Gmnathopod 9 
in ©, 5tk joint widened at middle of hind margin, 6! joint short, the rounded 
apex little produced beyond the small longitudinal finger. Peraeopods 1—5 
spinulose, peraeopods 3—5: with 24 joint well expanded, hind margin of it 
in peraeopod 5 almost straight with well rounded lower corner; peraeopods 4 
and 5 long and slender. Uropod 1, outer ramus with only apical spines. 
L. 10—12 mm. : 


Tropical Paeifie (Tongatabu, under sea-weed; Port Denison [Queensland], on 
sandy beach). 


17. T. brito Stebb. 1891 T7.b., T.Stebbing in: Ann. nat. Hist., ser. 6 ©.8 p. 324 
t.15 | 1895 T. b., Chevreux in: Rev. biol. Nord France, v.7 p.158 | 1898 Orchestia 
chilensis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 498. 


Back moderately broad. Side-plate 1 directed somewhat forward, 
narrower than the subequal, subquadrate 24—4th, Pleon segment 3, postero- 
lateral corners quadrate. Eyes large, irregularly rounded, separated by less 
than their width, in life white, with dark pigment showing through. Antenna 1 
not quite reaching end of penultimate joint of peduncle of antenna 2, 3 joints 
of peduncle subequal, or sometimes in Q 2Xthe longest, flagellum less than half 
as long as peduncle, 7-jointed in C, 5-jointed in Q. Antenna 2, penultimate 
joint of pedunele more than half as long as the long and stout ultimate, flagellum 
with about 30 short joints in S, 22 in 9. Maxilla 1, minute palp 2-jointed. 
Gnathopod 1 in JS, 5tk joint long, with pellueid bubble-like process near distal 
end of hind margin, 6'% much shorter, more spinose, with similar process, 
finger short, projecting beyond palm. Gmathopod 2 in J, 4 joint short, 
square, 5!" small, cup-shaped, 6!" massive, palm spinulose, scarcely erenulate, 


ae 


2 ee FI a EB LEE EB A Ve 


7 Dr a a ZB u 
’ 


» 
4 
> 


Talorchestia 553 


convex, very oblique, closed finger leaving a small gap near hinge, otherwise 
fitting palm except at overlapping apex. Gnathopod 1 in © nearly as in J, 
but without the pellucid processes of 5tk and 6tk joints, the latter narrowing 
to base of finger. Gnathopod 2 in O almost membranaceous, 24 joint rather 
narrowly oval, 5t" subdistally widened, 6! with rounded end produced beyond 
the minute chela-forming finger. Peraeopods 2 and 3 shorter than the rest 
and with much smaller finger, deeply notched in peraeopod 2, slightly in 
peraeopod 3. Im peraeopod 3, 24 joint subeircular, in peraeopod 4 broadly 
oval, in peraeopod 5 as long as in peraeopod 4 but rather wider. In peraeo- 
pods 4 and 5 joints 4—6 elongate, spinulose, none expanded. Pleopods, 
peduncle long, membranaceous, rami with 15 or 16 joints. Uropods 1 and 2, 
pedunele rather longer than the spinose rami. : Uropod 1 much the longest. 
Uropod 3, ramus about as long as peduncle. Telson narrowest at truncate 
distal end, surrounded with groups of spinules, Colour yellowish white, 
with bars of yellow, side-plates bordered with purple, and sometimes pleon 
banded with the same. L. S 20 mm, © smaller. 


North-Atlantie (North-Devon, burrowing in sand; Verdon [Gironde]). 


18. T. novaehollandiae Stebb. 1899 T.n., T. Stebbing in: Tr. Linn. Soc, 
London, ser.2 v.7 p.399 t.31.A. 


Body stout. Pleon segment 2, postero-lateral corners with an acute 
point, segment 3 quadrate. Eyes round, dark, about their diameter apart. 
Antenna 1 reaching beyond penultimate joint of peduncle of antenna 2, joints 
of peduncle not elongate, flagellum shorter than peduncle, 6-jointed. An- 
tenna 2 verticillately spinulose, about '/, as long as body, ultimate joint of 
pedunele longer than penultimate, flagellum rather shorter than peduncle, - 
19-jointed. Gnathopod 1 in JS, 5tk joint longer than 6%, with narrow apical 
process, 6% short, much widened distally, finger overlapping palm but not process 
of hind margin. Gmnathopod 2 in S, 24 joint narrow, 6!" very large, slightly 
widening to the almost transverse palm, which is defined by a small pocket, 
a broad convexity leading thence to a spinulose concave space near the finger- 
hinge, over which space the finger arches, the convexity of its sinuous margin 
touching the convexity of the palm and its apex passing. into the defining 
pocket. Gmathopod 1 in 2 see Fig. 94 (p. 543), 6*h joint short, spinulose, 
narrowing very gradually to the short finger. Gnathopod 2 in O, 24 joint 
membranaceous, well expanded, 6! joint rather narrow. Peraeopods 1—5 


‚spinulose, 24 joint in peraeopods 3—5 well expanded, largest and broadest 


in peraeopod 5, with subquadrate ending of hind margin, peraeopod 4 much 
longer than peraeopod 3, peraeopod 5 considerably longer than peraeo- 
pod 4, its 4 and 5b joints rather long and stout. Uropods 1—3, on 
peduncle and all. rami, have marginal spines. Uropod 3, ramus slender, 
shorter than peduncle. Telson much longer than broad, composed of separate 
halves, which appear to fold eloselv together, each with 2 apical spinules 
and 2 marginal spines. L. about 10 mm. 


South-Paeific (Manly Beach [East-Australia]). 


19. T. martensii (M. Weber) 1892 Orchestia m., M. Weber, Reise Niederl. 
O.-Ind., 0.2 p.564 f. 13—16. 


Pleon segment 3, postero-lateral corners with produced point. Eyes 
oval, as far apart as the shorter diameter. Antenna 1, 24 joint of peduncle 
the longest, flagellum shorter than peduncle, 5-jointed. Antenna 2, ultimate 
and penultimate joints of peduncle long, flagellum almost as long as peduncle, 


554 Talorchestia, Ceina 


21—25-jointed. Gnathopod 1 in S, 5tk joint apically furnished with nar- 
rowly rounded process, 6'% distally little widened, with slightly concave palm, 
overlapped by the finger. Gnathopod 2 in JS, 6fk joint short but broadly 
ovate, palm slightly convex and oblique, joining the almost straight hind 
margin in a gentle curve, the long finger closing between 2 rows of spines 
which line the palm. Gnathopod 1 in Oo, 5tk joint without process, 6th 
narrowing to the apex, which is hardly wider than base of finger. Gmnatho- 
pod 2 in Q, 5tk joint broad, front margin very convex, hind produced into 
a central lobe, 6 almost as long as 5tk, produced into a broadly rounded 
lobe bent forward so as to project beyond the minute, longitudinally placed 
finger. Peraeopod 5, 24 joint with 13—15 spines on the hind margin, which 
is straight with rounded corners. Uropod 3, ramus rather shorter than 
pedunele L. oO 11, d 8 mm. 


Flores. Under stones in and at the margin of the rivulet Lella. 


T. africana Bate 1862 T.?.a., Bate, Cat. Amphip. Brit. Mus., p.15 t.2 £.6. - 


2. Side-plate 5 as deep as the preceding and very broad, nearly as broad as 
length of 3 segments of peraeon. Eyes small. Antenna 1 as löng as pedunele of 
antenna 2. L. 14 mm. 


Port Natal [South Africa]. 


T.cookii Filh. 1885 T.c., Thalorchestia c., Filhol in: Recu. Passage Venus, 
v.3ur Zool: p.459 t.53 f.4; Planches p.28 | 1893 ÖOrchestia? cooki, A. Della Valle in: 
F.F1.Neapel, v.20 p.512 | 1898 O. tumida (part.), G.M. Thomson in: Tr. N. Zealand Inst., 
v.31 p. 203. 

Probably identiecal with T. tumida (p. 550). Only described. L. 17 mm. 


South-Paeifie (New Zealand). 


6. Gen. Ceina Della Valle 


1893 Ceina (Sp. un.: C. egregia), A. Della Valle in: F. Fl. Neapel, v.20 p. 530 | 
1899 C©., T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p. 397. ? 


Antenna 1 longer than peduncle of antenna 2. Maxillipeds, finger of 
palp broad, subtriangular. Gnathopod 1 in JG and O, and gnathopod 2 
in © subchelate, small. Gnathopod 2 in much larger, subchelate or (in 
maturity) chelate. Uropod 3 tubereular, without rami. Telson partially eleft. 


1 species. 


1. C. egregia (Chilton) 1883 Nicea e., Chilton in: Tr. N. Zealand Inst., v.15 
p- 77 t.2 f.2a—1 | 1886 N.e., G.M. Thomson & Chilton in: Tr. N. Zealand Inst., v.18 
p. 144 | 1888 N.? e., T. Stebbing in: Rep. Voy. Challenger, 0.29 p. 1712 | 1893 Ceina e., 
A. Della Valle in: F. Fl. Neapel. 0.20 p.530 t. 58 f. 14—21. 


Body much compressed, segments imbrieated and subcarinate, more 
strongly in Q than in J, peraeon segment 1 produced somewhat over the 
head, especially in ©. Head produced slightly upward at base of antenna 1. 
Side-plates 1—4 successively deeper, 5tı—7th much shallower. Pleon seg- 
ment 3, postero-lateral corners rounded. Eyes of moderate size, round. 
Antenna 1, 24 joint slightly shorter than 1°, 34 than 24, flagellum subequal 
to peduncle, with sensory filaments. Antenna 2 about ?/, as long as body, 
ultimate and penultimate joints of peduncle equal, flagellum rather longer 
than peduncle. Lips, mandihble and maxillae 1 and 2 undescribed. Mandible 
not showing (in figure) spine-row or molar. Maxillipeds with 2 rounded 
apical teeth on inner plate, 1° joint of palp produced on outer side beyond 


la N rn 3 a a ne im eh en nun 


Ceina, Chiltonia 555 


the 24, 34 distally widened, not longer than 4. Gmathopods 1 and 2 
in Q equal and similar, 5% joint long, subtriangular, 6% rather longer, not 
wider, oblong, palm slightly oblique, defined by palmar spine, finger matching 
palm. Gnathopod 1 ind as in 9. Gmnathopod 2 in JS, 24 joint narrow, 
5th apparently coalesced with the large oblong oval 6t&, which in smaller 
specimens has a short transverse palm, but, the hind margin being gradually 
produced, at length a complete though small chela is formed. Peraeopods 
1—5 subequal, rather stout, almost unarmed, 4tk joint rather expanded 
distally, finger strong, curved. Peraeopods 3—5, 24 joint rounded oval. 
Uropods 1 and 2 short, rami subequal to peduncle, spinose. Uropod 3, each 
member consisting of a single, rounded, unarmed joint; the pleon segment 6 
has the appearance of forming a peduncle to the pair. Telson subrectangular, 
about as broad as long, apically rounded, cleft about to centre. Colour red, 
sometimes blue; integument thick, opaque. L. 6—7 mm. 


Lyttelton Harbour [New Zealand]. On sea-weed (Macrocystis). 


7. ‚Gen. Chiltonia Stebb. 


1899 Chiltonia (Sp. un.: CO, mihiwaka), T. Stebbing in: Tr. Linn, Soc. London, 
ser.2 v.7 p.408. 


Side-plates 1—4 deep. Antennae 1 and 2 equal in length. Maxilla 1 
without palp, notched at palp’s normal position. Maxillipeds, 4 joint of palp 
short, conical. Mouth-parts otherwise normal as in the family. Gnathopods 1 
and 2 subchelate, gnathopod 2 very unlike in © and in d. Uropod 3 
1-jointed. Telson simple. 


1 species. 


1. C. mihiwaka (Chilton) 1898 Hyalella m., Chilton in: Ann. nat. Hist., ser. 7 
v.1 p.423 t.18 | 1899 Chiltonia m., T.Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.408, 


Body stout, back of peraeon broad. Side-plate 4 much wider than 
the preceding, much deeper than the following peraeopods. Pleon seg- 
ment 3, postero-lateral corners quadrate. Eyes small, round. Antenna 1, 
pedunele rather long, 1° joint as long as 24 and 34 combined, flagellum 
subequal to peduncle, in JS 10-, in O 8-jointed. Antenna 2, gland-cone promin- 
ent, ultimate joint of peduncle a little longer than penultimate, flagellum 
shorter than peduncle, in S 8-, in © 6-jointed. Maxillipeds, inner plates 
with outermost of the 3 apical spine-teeth large, outer plates smaller than 
inner, armed with fine setae, 4% joint of palp with a long apical seta. 
Gnathopod 1, 5tR joint as long as 6%, hind margin fringed with about 15 
long setae, 6! subreetangular, widening distally, palm nearly transverse, 
well defined by a projection of hind margin. Gnathopod 2 in CO, 34, 4th 
and 5th joints small, subequal, 5!" not lobed, squared, 6! very large, oblong, 
slightly widened distally, palm slightly convex, very little oblique, defined 
by a process of hind margin, finger stout, inner margin slightly projeeting 
near base. Gmnathopod 1 in Oo as in Cd. Gmathopod 2 in O like gnathopod 1, 
but 5tk joint shorter, subtriangular, with only 5 or 6 setae. Peraeopods 
3—5, 24 joint very broad, hind margin very convex, minutely serrate. 
Uropods 1 and 2 well developed. Uropod 3 very minute, with no distinet 
peduncle, the single ramus pear-shaped and bearing a few minute setae, the 
ramus here spoken of perhaps including the pedunele. Telson subreetangular, 
angles rounded. Colour greyish or nearly white. L. reaching 5 mm. 


New Zealand. Mountain streams up to about 457 m; and at 731 m. 


* 


556 Parhyale, Neobule 


8. Gen. Parhyale Stebb. 


1897 Parhyale (Sp. un.: P. fasciger), T. Stebbing in: Tr. Linn. Soc. London, ser.2 
v.7 p.26. : 


Distinguished from Hyale (p. 559) only by the uropod 3, which has 
a minute inner ramus. 


1 species. 


1. P. fascigera Stebb. 1897 P. fasciger, T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 ©.7 p.26 t.6. 


Side-plates 1—4 well developed, 1% widened below, 4!" slichtly 
bi-emarginate behind. Pleon segment 3, postero-lateral corners quadrate. 
Eyes large, oval, dark, obliquely approximate. Antenna 1, 1° joint fully as 
long as 24 and 34 combined, flagellum longer than peduncle, 10- or 11-jointed. 
Antenna 2, ultimate and penultimate joints of peduncle subequal, flagellum 
not greatly longer than peduncle, in JS 20-, in 0 14—16-jointed. Maxillipeds, 
24 and 34 joints of palp distally widened, 34 in J having a dense fasciele 
of setae at outer apex. Gmathopod 1 in C, 5tk joint with broad, fringed 
distal lobe, 6th as’broad and long as 5tP, oblong, with row of spines on distal 
half of hind margin, palm rather oblique, well defined, finger stout, inner 
margin with small setules, the tip acute, passing 2 stout palmar spines. 
Gmathopod 1 in O, 6% joint less broad than 5t", finger .not so stout as in C, 
Gnathopod 2 in C, 6th joint massive, oblong, hind margin with little sub- 
distal group of spinules, palm very oblique, spinulose, convex, ending in a 
small pocket with palmar spines, receiving apex of long and broad, well 
curved finger. Gnathopod 2 in O, 6!" joint less massive, palm still more oblique, 
leaving a very short hind margin, which is fringed with spines; marsupial 
plates long, distally acute and closely fringed with rather short setae. 
Peraeopods 1—5 not elongate, the spines not large, finger short, with strong 
inner setule.. Peraeopods 3—5, 24 joint well expanded, hind margin not 
strongly serrate. Uropods 1 and 2, outer ramus without marginal spines. 
Uropod 3 short, peduncle not as long as telson, outer ramus a little shorter 
than pedunele, inner ramus conical, tipped with a very short seta. Telson 
divided to the base, the lobes oblong or subtriangular, almost vertieally 
placed. L. about 7 mm. 


Caribbean Sea (St. Thomas, harbour; Antigua). 


9, Gen. Neobule Hasw., 


1879 Neobule (Sp. un.: N. algicola), Haswell in: P. Linn. Soc. N. S. Wales, v.4 
p. 255 | 1880 Neobula, J. V. Carus in: Zool. Anz., ©.3 p. 291. 


Maxillipeds, inner plates developed, but not outer. Gnathopod 2 larger 
than gnathopod 1, both subchelate. Uropod 3 biramous. Telson squamiform. 
1 accepted and 2 doubtful species. 


1. N. gaimardii (M.-E.) 1840 Amphitoe g., H. Milne Edwards, Hist. nat. 
Urust., ©.8 p.87 | 1879 Neobule algieola, Haswell in: P. Linn. Soe. N. S. Wales, v.4 
p-255 t.8 f.4 | 1885 N. (Hyale?) a., Haswell in: P. Linn. Soc. N. S. Wales, v. 10 p.96 
t.11 £.4—6 | 1893 N. (H.?) a., A. Della Valle in: F. Fl. Neapel, v.20 p. 897. 


Side-plates large, especially side-plate 4. Eyes round. Antennae 1 
‚ and 2 equal. Antenna 1, 1° joint longer and stouter than the others, 


in en ee 


sul m he Der 2 ee 


Neobule, Parorchestia 557 


39 very short, flagellum rather longer than peduncle, about 11-jointed. 
Antenna 2, ultimate joint of pedunele longer than penultimate, flagellum 
subequal to pedunele, 11-jointed. Gnathopod 1, 5th joint triangular, subequal 
to the oblong 6%, palm transverse, slightly concave, finger matching palm. 
Gnathopod 2, 5% joint distally expanded into a broad, somewhat produced 
lobe, 6! broadly oblong, palm straight, transverse. Peraeopod 5 longer 
than peraeopod 4, 2° joint broader than in preceding peraeopods. Uropod 3. 
rami extremely short (not figured by Haswell). L. about 6 mm. 

South-Paeifie (New Holland; Kiama [New South Wales]. Among sea-weed 
between tide-marks. 


N. armorica (M.-E.) 1830 Amphithoe a., H. Milne Edwards in: Ann. Sci. nat., 
v.20 p.378 | 1862 Amphithoö a., Nicea (part.)?, Bate, Cat. Amphip. Brit. Mus., p. 243 | 
1893 Amphithoe a., A. Della Valle in: F. Fl. Neapel, v.20 p. 424. 

Uropod 3 short. ending in 2 conical appendages much shorter than peduncle. 


Brittany. 


N. reynaudii (M.-E.) 1830 Amphithoe r., H. Milne Edwards in: Ann. Sei. nat., 
v.20 p.378 | 1862 Amphithoe r., Bate, Cat. Amphip. Brit. Mus., p. 243 | 1893 Amphithoe 
rubricata (part.), A. Della Valle in: F. Fl. Neapel, ©.20 p. 459. 


Cape of Good Hope. 


10. Gen. Parorchestia Stebb. 
1899 Parorchestia, T. Stebbing in: Tr. Linn. Soc. London, ser.2 v.7 p.402. 


Like Orchestia (p. 530), but maxillipeds with 4" joint of palp distinet, 
though very small, eonical and having a spine on the truncate apex. 
3 species. 
Synopsis of species: 
1 | Antenna 1, 34 joint shorter than 24... .... 1. P.tenuis. . . . p.557 
Antenna 1, 3d joint longer than 24 — 2. 


9 | Antenna 1, joints of flagellum unusually elongate . 2. P. hawaiensis . p.558 
Antenna 1, joints of fagellum not unusually elongate 3. P. sylvieola . . p.558 


1. P.tenuis (Dana) 1852 Orchestia t., J. D. Dana in: P. Amer. Ac., v.2 p.202| 
1853&55 O. t., J. D. Dana in: U.S. expl. Exp., u. 13u p.872; t.59 f.1 | 1862 O.t., 
Bate, Cat. Amphip. Brit. Mus., p.29 t.4 f.10 | 1899 O. £., Parorchestia (part.), T. Stebbing 
in: Tr. Linn, Soe. London, ser.2 v.7 p.402 | 1881 O. sylvicola (err., non J. D. Dana 
18521), G. M. Thomson in: Tr. N. Zealand Inst., v.13 p.212 t.7 f.4 | 1884 Allorchestes 
recens, &. M. Thomson in: Tr. N. Zealand Inst., v.16 p.235 t.13 £.2—5 | 1886 A.r., 
G.M. Thomson & Chilton in: Tr. N. Zealand Inst., v.18 p.145 | 1888 A. r., T. Stebbing 
in: Rep. Voy. Challenger, v. 29 p. 1639 | 1898 Orchestia gammarellus (part.), A. Della 
Valle in: F. Fl. Neapel, e.20 p.501. RR 


Body compressed. Side-plate 1 less broad than any of side-plates 2—5; 
side-plates 2—4 excavate behind, 5tk shallower than 4. Pleon segment 3, 
postero-lateral corners quadrate, a little produced acutely.. Eyes small, 
roundish, dark, scarcely their width apart. Antenna 1, 3% joint of pedunele 
not so long as 24, flagellum subequal to peduncle, 5- or 6-jointed. Antenna 2 
half as long as body (Dana) or less; ultimate joint of pedunele a little longer 
than penultimate, flagellum rather longer than peduncle, 8—14-jointed. 
Upper lip apically broadly rounded. Maxilla 1, palp minute. Gnathopod 1 
in C small, compact, 4" joint having on hind margin an apical scabrous boss, 
5tk with free part of hind margin broadly produced, scabrous, 6tk shorter 


558 Parorchestia 


than 5tk, widening distally into a scabrous boss, so that the finger does not 
reach the end of the apical border but only that of the true palm, which is 
transverse and setulose. Gmathopod 2 in J, 24 joint slightly widened distally, 
5th small, triangular, masked by 4%; 6th Jarge, with the closed finger forming 
a broad oval, palm rather oblique, nearly straight, with slight sinuosities, 
fringed with spines, well defined but not by a tooth. Gnathopod 1 in oO, 
expansions of 4 and 5tk joints smaller than in J, 6tk narrow at base, 
then rather wide, almost evenly oblong and smoothly margined to the palm, 
which is nearly straight and transverse, with a finger reaching exactly to 
the end of it and of the apical margin. Gnathopod 2 in Q, 24 joint not 
expanded, 4 and 5tk resembling those of gnathopod 1 in JS, though a little 
less robust, 6! nearly as long as 5tt, hind margin straight, produced in a 
narrowly rounded lobe a little beyond the short, stout, acute finger and the 
small, excavate, oblique palm. Peraeopods 1—5 rather short and compact, 
finger small. Peraeopods 3—5, 24 joint well expanded, as broad below as 
above. Branchial vesicles oval. Pleopods 1—3, rami as long as peduncle. 
Uropods 1 and 2 not elongate, outer ramus without marginal spines. Uropod 3 
small, ramus slender, rather shorter than peduncle. Telson rather longer 
than broad, proximally squared, then narrowing to entire apex with groups 
of spinules.. L. about 12 mm. 


New Zealand. Among roots of grasses and in a small stream. 


2. P. hawaiensis (Dana) 1853 & 55 Orchestia h.; J. D. Dana in: U. S. expl. 
Exp., v.13u p.880; t.59 £.8 | 1862 O.h., Bate, Cat. Amphip. Brit. Mus., p.32 t.5 
£.7 | 1893 O.? h., A. Della Valle in: F. Fl. Neapel, v.20 p.509 | 1899 O.h., Parorchestia 
(part.), T. Stebbing in: Tr. Linn. Soe. London, ser.2 v.7 p. 402. 


Side-plates rather large, 5!" almost as deep as 4". Pleon segments 1—3 
with no hairs, setae, or notches on the lateral margin. Eyes nearly round. 
Antenna 1 reaching nearly end of ultimate joint of peduncle of antenna 2, 
34 joint as long as 1° and 24 combined, flagellum with 7 joints which are 
full 4 times as long as broad. Antenna 2 rather more than half as long as 
body, peduncle rather long, flagellum longer than peduncle, with 17 or 18 joints, 
which are more than twice as long. as broad. Gnathopod 1 in O, 6% joint 
oblong, but narrower at apex, and not properly truncate, finger a little longer 
than the width of the joint. Gmathopod 2 in Q, 4 joint gibbous and finely 
scabrous below, 6!" not much shorter than 5tk, with distal expansion not very 
broad, the minute finger rather obliquely placed. Peraeopods 1—5 slender, 
1°? and 24 comparatively long, 39 not shorter than 24. Uropod 1, outer ramus 
with only apical spines, one very long. L. 16—18 mm. 


Tropical Paeifie (Hawaiian Islands). 


3. P. sylvicola (Dana) 1852 Orchestia s., J. D. Dana in: P. Amer. Ac., v.2 
p. 202 | 1853 & 55 O. s., J. D. Dana in: U. S. expl. Exp.. v. 13u p. 873; 1.59.29, £. 
3 | 1862 O. s., Bate, Cat. Amphip. Brit. Mus., p.21 t.3 f.7 | 1881 O. s., G. M. Thom- 
son in: Tr. N. Zealand Inst., v.13 p.208 t.7 f.4 | 1886 O.s., G. M. Thomson & Chilton 
in: Tr. N. Zealand Inst., «.18 p.145 | 1893 O.s., A. Della Valle in: F. Fl. Neapel, 
v.20 p.510 | 1899 O.s., Parorchestia (part.), T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 v.7 p.402. 


Body rather compressed. Side-plates not very large, 5th nearly as deep 
as 4th, Pleon segment 3, postero-lateral corners quadrate. Eyes round, 
rather small, dark, usually as far apart as their width. Antenna 1 reaching 
end of penultimate joint of peduncle of antenna 2, but sometimes much 
farther, 34 joint longer or much longer than 24 or 18, flagellum not shorter 


De DE De © 


anime en 


ABEL An ae ai. al a a ri gran ai 
X T 6 


Bar u ae ana Fr 


El a Le tee 


EEE TE zu 
EINEN OIR: : 


RE EEE RE EN a en 
en Ä 


Parorchestia, Hyale 559 


than peduncle, 8-jointed. Antenna 2 slender, penultimate joint of peduncle more 
than half as long as ultimate, flagellum with about 20 joints, which are longer 
than broad. Gmathopod 1 in J slender, 4" joint with obtuse pellueid process 
of hind margin, 5tk with free part of hind margin broadly produced, 6! joint 
not very long, with ?/, length of hind margin slightly bulging, and the small 
finger reaching end of palm, but not of apical border. Gnathopod 2 in J, 
6th joint large, subovate, palm spinulose, very oblique, slightly convex, not 
defined by any tooth, with a very small excavation near the hinge, finger 
with a corresponding thickening, the rest of its inner margin slightly sinuous. 
Gnathopod lin oO, 4 joint longer than 34, 5t much longer than 6b, 6% narrowly 
oblong, finger a little overlapping the palm. Gnathopod 2 in O, 34 joint 
longer than 4th, 5th rather longer than 6%", free part of hind margin somewhat 
expanded, 6th elongate, produced to a narrowly rounded apex, much beyond 
the small finger, which is placed rather obliquely. Peraeopod 3 considerably 
shorter than peraeopod 4, 24 joint in both -piriform, with scarcely any free 
corner. Peraeopod 5 rather longer than peraeopod 4, 24 joint much wider, 
as broad as long, a little narrowed below, free corner rounded, distinct. 
Uropods 1 and 2, outer ramus with spines only at apex, in both sexes (Dana: 
only in d). Uropod 3, pedunele short, scarcely longer than broad, ramus 
triangular, much narrower than peduncle and rather shorter, with 3 spines. 
Telson slightly notched at apex. L. 12—16 mm. 


New Zealand. From moist soil in the bottom of the extinet voleano of Taiamai 
far from the sea, and perhaps in other parts. 


11. Gen. Hyale.H. Rathke 


1837 Hyale (Sp. un.: H. pontica), H. Rathke in: M&m. pres. Ac. St.-Pötersb., 
v.8 p.877 | 1876 H., T. Stebbing in: Ann. nat. Hist., ser.4 v.17 p.337 | 1879 H., Subgen. 
H., Wrzesniowski in: Zool. Anz., v.2 p.201 | 1888 H., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.171ete. | 1890 H., G. O. Sars, Crust. Norway, v.1 p.26 | 1893 H., 
A. Della Valle in: F. Fl. Neapel, v.20 p.517 | 1849 Nicea (Sp. un.: N. lucasii), H. Nicolet 
in: Gay, Hist. Chile, v.3 p.237 | 1849 Allorchestes (part.), J. D. Dana in: Amer. J. Sei., 
ser.2 v.8 p.136 | 1852 A. (part.), J. D. Dana in: P. Amer. Ac., v.2 p.205 | 1856 Galanthis 
(Sp. un.: @. lubbockiana) (non Gistl 1848, Mollusca!), Bate in: Rep. Brit. Ass., Meet. 25 
p.57 | 1857 @., Bate in: Ann. nat. Hist., ser, 2 v.19 p. 136. 


Side-plate 4 much deeper than 5%, Antenna 1 longer than peduncle 
of antenna 2. Maxilla 1, palp 1-jointed, reaching to base of apical spines 
of outer plate. Maxillipeds, palp 4-jointed. Gnathopod 2 in 9 (Fig. 96 
p. 565), 5" joint small, masked behind by 4. Gnathopod 2 in Q, 5 joint 
produced behind between 4tR and 6". Uropod 3 uniramous. Telson divided. 


Chiefly on coasts, also in the Sargasso Sea and on floating objects of various 
kinds, sometimes apparently.in the open ocean. 


22 accepted and 20 doubtful species. 


Synopsis of accepted species: 


1 H Body carinate — 2. 
Body not earinate — 38. 


9 { Body without dorsal teeth . ... .... I B0arinata .. ... p- 561 
Body with dorsal teeth.. ........ 2. H. ochotensis . . . . p.561 

3 { Antenna 2 longer than the body . . . . - 3. H. campbellica . . . p.562 
Antenna 2 not longer than the body — 4. 


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Hyale 


Gnathopod 2 in 3, hind margin of 6th joint 
extremely short — 5. 
Gnathopod 2 in 5, hind margin of 6th joint 
not extremely short — 11. 
Gnathopod 1 in J, finger strongly fureate . A. 
Gnathopod 1 in d, finger not strongly furcate — 6. 
Gnathopod 1 in 3, 6th joint with hump on 
front margin 
Gnathopod 1 in g, 6th joint with smooth 
front margin — 7. 


Gnathopod 1 in 3, 6th joint with serrulate 


ish at a a 6. 

Gnathopod 1 in 5, 6th joint without serrulate 
distal margin — 8. 

Gnathopod 2 in 3, palm densely fringed with 
setules — 9. 

Gnathopod 2 in S, palm not densely fringed 
with setules -— U. 

DIV TORMSTIB- + ee ae 2. 

Eyes not reniform — 10. 

Gnathopod 2 in S, finger not nearly as long 
ee a: 

Gnathopod 2 in G, finger nearly as long 
BE BMIOBE 0 De a een 9. 

Gnathopod 1 in G, finger with subapical 
SODBIFIREIOR u Ba EN 10. 

Gnathopod 1 in S, finger without subapical 
constrietion — 12. 

Peraeopods 4 and 5, 6tl joint with spine and 
setae on mid hind margin. . .... . 17. 

Peraeopods 4 and 5, 6th joint with smooth 
hind margin — 18. 

Antenna 2 stout — 14. 

Antenna 2 not stout — 17. 

Peraeopods 1—5, finger distinetly though 
mieroscopically pectinate — 15. 

Peraeopods 1—5, finger not distinetly 
pecetinate — 16. 

Uropod 1, marginal spines on only one of 
RE Tee eat 12. 

Uropod 1, marginal spines on both rami. . 13. 

Gnathopod 1 in S, 6th joint distally narrowed 14. 

Gnathopod 1 in 3, 6th joint distally widened 15. 

Peraeopods 3—5, 6th joint with a very con- 
spicuous serrate spine — 18, 

Peraeopods 3— 5, 6th joint with no exceptionally 
eonspicuous serrate spine — 19. 

Gnathopod 1 ind, 5th joint produced along 6th 16. 

Gnathopod 1 in d, 5th joint not produced 
BR OR nn 17. 

Peraeopods 1—5, setule on inner margin of 
Bager JROBE 7. een 18. 


Peraeopods 1—5, setule on inner margin of 
finger weak — 20. 


H. diplodaetyla . . . p.562 
H. galateae .. .: . p. 563 
H. maroubrae. . . . p.563 
H.graminea ... . p.564 
H. hirtipalma . . . . p.564 
H. maerodactyla. . . p.564 
3: aquiline'-- .. =, p. 565 
H. prevostil. ..:..- p- 565 
H. grandicornis . . . p. 566 
H. novaezealandiae . p.567 
H. grimaldi. . . . . p.567 
H. crassicornis . . . p.568 
E. pontioe 1.50% p: 568 
BU media ;2., + 55% p- 569 
H.perleri. :; : ..,. p. 570 


a  llarlun 5e ET ee an, PETER PN 
eh ac te u nen EN r 
x AE el ö 


Hyale 561 


ODER a ee 19. H. camptonyx. . . . p.570 
Maxillipeds in 3, setule at tip of finger not 


Maxillipeds in 5, finger tipped with very 
„| 
very long — 21. 


Gnathopod 1 in d, 6th joint not twice as 
91 en ER EUER 20. H. schmidti . . . . p.571 
Gnathopod 1 in S, 6th joint twice as long as 
broad — 22. 
Gnathopod 2 in d, palm shorter than hind 
PR) on 2 > Bi ER p. 571 
Gnathopod 2 in d, palm not shorter than 
RE AR EI EERS ET: 22. u rabie. ee. p. 572 


1. H. carinata (Bate) 1862 Allorchestes carinatus, Bate, Cat. Amphip. Brit. 
Mus., p.87 t.6 f.2 (3 juv.?) | 1866 Nicea longicornis (non Orchestia I. Kreyer 1845)), 
E. Grube in: Arch. Naturg., v.821 p.388 | 1866 N. crassipes, Cam. Heller in: Denk, 
Ak. Wien, v.26ır p.12 t.1 f.34, 35 (S juv.?) | 1893 Hyale pontica (part.: juv.)?, A. Deila 


Valle in: F. Fl. Neapel, v.20 p. 528. 


Peraeon segments 1—6 dorsally rounded, not broadly, peraeon segment 7 
and pleon segments 1—3 slightly carinate. Side-plates I—4 rather large, 
1°: widening, 24 narrowing distally. Pleon segment 3, postero-lateral corners 
quadrate, with slight projeeting point. Eyes small, subrotund, wider than 
their diameter apart. Antenna 1 stouter than antenna 2 and not shorter, 
18t joint stout, as long as 24 and 34 combined, flagellum 11-jointed. Antenna 2, 
ultimate and penultimate joints of peduncle subequal in length, neither of 
them as long or nearly as stout as 1° of antenna 1, flagellum 12-jointed. In 
the young taken from mother’s pouch antenna 1 decidedly longer than antenna 2, 
flagellum 3-jointed, antenna 2, flagellum 2-jointed. Lower lip, prineipal lobes 
distally narrowed, divergent. Maxillipeds, apical spine of palp longer than the 
conical 4 joint. Gnathopod 1 in J', 6 jointsmall, elongate quadrangular, hind 
margin almost straight, with a setose indent near middle, palm nearly trans- 
verse, the slightly curved finger matching it (Heller). Gnathopod 2 in Ö, 
öfh joint not produced between 4 and 6th, 6tk broad, somewhat oval, palm 
oblique, about equal to the nearly straight hind margin, defined from it by a blunt 
angle, finger slightly curved (Heller). Gmathopod 1 in Oo, 24 joint narrow, 
reaching end of side-plate, 5tk not lobed, scarcely as long as the narrow 
oblong 6, of which the hind margin is fringed with spines, palm convex, 
not at all oblique, finger longer than palm. Gnathopod 2 in oO with narrow 
branchial vesicle, and long broad marsupial plate fringed with long 
setae, the limb almost exactly like that of gnathopod 1, 24 joint slightly 
larger, 5% rather broader, 6 rather longer (Grube). Peraeopods 1 and 2 
rather slender. Peraeopods 3—5 rather robust, 24 joint with hind margin 
faintly erenulate, in peraeopods 3 and 4 this joint oblong, a little wider above 
than below, 4 joint expanded to twice width of Stk; in peraeopod 5 24 joint 
with convex front margin, hinder expansion giving it a eircular appearance, 
the expansion produced below the 34 joint, 4!h less expanded than in the 2 
preceding peraeopods; finger in all peraeopods stout and eurved. Uropods 1—3 
short. Telson short, broad, each half nearly as broad at base as the length, 
apex also broad. L. Q reaching 6, d reaching 8 mm. 


Mediterranean (Italy, Messina); Adriatie. 
2. H. ochotensis (F. Brandt) 1851 Allorchestes o., F. Brandt in: Middendorff, 


Reise Sibirien, ». 21 p. 143 t.6 f.27a—f | 1893 A. o., A. Della Valle in: F. Fl. Neapel, 
v.20 p.528 | 1888 Hyale o., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 247. 


Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 36 


562 Hyale 


Body at centre moderately, behind very strongly compressed, in the 
last °/, having a earina gradually encreasing in strength, peraeon segments 
6 and 7 each with small dorsal tooth, pleon segments 1—4 each with a strong 
one. Side-plates 1—5 rather large. Pleon segment 3, postero-lateral corners 
seemingly obtusely quadrate. Eyes rather small, almost reniform, black. 
Antenna 1 very little shorter than antenna 2, which are about half as long 
as body, both antennae sparingly armed, with flagellum longer than peduncle. 
Gnathopod 1, 5th joint short, distally wider than 6th, 6th elongate oval, palm 
oblique, ill-defined, finger bent. Gmathopod 2, 5tk joint distally narrower 
than 6th, 6tk somewhat similar in shape to that of gnathopod 1 but much 
larger, elongate-rhomboidal. Peraeopod 3, 24 joint. rather small, almost 
eircular. Peraeopod 4, 24 joint rounded quadrate. Peraeopod 5, 24 joint with 
expansion large, rounded behind, below produced into a triangular lobe. Uropod 3, 
ramus narrow, spinose, as long as peduncle. Telson with a spinule on each of 
the short, rounded rhomboidal, apically thickened lobes. L. reaching 29 mm. 


Sea of Ochotsk. 


3. H. campbellica (Filh.) 1885 Allorchestes e., Filhol in: Recu. Passage Vönus, 
v.311 Zool. p. 466. 


Eyes small, round. Antenna 1 reaching base of flagellum of antenna 2, 
which is a little longer than the body. Gmathopod 1, 5tk and 6th joints 
equal in length. Gnathopod 2, 6!" joint robust, oval, a little compressed 
laterally, finger hooked, the part of the hand to which it is applied showing 
on the inner face a series of minute denticulations; 5tk joint without produced 
process („spine*). Peraeopods 3—5 have very fine setae at the apices of 
their joints; hind margin of 4tk joint dentieulate. L. 8 mm. 


South-Pacific (shore of Perseverance Bay [Campbell Island]). 


4. H. diplodactyla Stebb. 1899 H. diplodactylus, T. Stebbing in: Tr. Linn. 
Soc. London, ser.2 v.7 p.403 t.310. 


Side-plates 1 and 2 not very deep, 1° little widened below. Eyes 
rounded, light-coloured in spirit. Antenna 1 much longer than peduncle 
of antenna 2, pedunele short, its joints suecessively much shorter, flagellum 
in d 14-, in © 9-jointed. Antenna 2, ultimate joint of peduncle longer 
than penultimate, flagellum in J 26-, in 
17-jointed. Gnathopod 1 in J (Fig. 95), 24 joint 
short, distal part wide, 4th distally squared, 

Se supporting fringed hind lobe of 5tk, this lobe 

Joint projeeting beyond a short straight piece of the 

Rear 6% joint? hind margin, 6% joint widening greatly to the 

palm, hind margin sinuous, much shorter than 

smoothly eurved front, palm long, not very 

Pig, @. au NIRENSENERR. MI: oblique, excavate, ending in a wide pocket, which 

ai receives the deeply furcate end of finger, which 

is thus wider distally than at its base. Gmathopod 2 in C scarcely differing 

from that of H. galateae, except that the expanded front margin of the 

24 joint is closely fringed with setules, and the 6'k is widest near to the 

base instead of at junetion of hind margin with the long very oblique 

palm. In other respects © and d appear to agree with H. galateae. 

Telson rather markedly upturned, with a slight twist to the rounded apex 
of each triangular lobe. L. about 5 mm. 


Caribbean Sea (St. Croix). 


Hyale 563 


5. H. galateae Stebb. 1899 H.g., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 
2.7 p.402 t.31B. 


Body and to some extent the appendages scabrous with little hairs 
or scales like an inverted T (in Pacific, but not in Atlantic speeimens). 
Side-plate 1 widened distally, 24 and 34 not very deep. Pleon segment 3, 
postero-lateral corners quadrate. Eyes large, oval, nearly meeting at the 
top of heäd, black. Antenna 1 much longer than peduncle of antenna 2, 
joints of peduncle small, successively shorter, flagellum in S with 9 or 10, 
in © with 7 distally widened joints. Antenna 2 about '/, as long as body, 
ultimate joint of peduncle considerably longer than penultimate, flagellum 
in C 12-, in Q 9-jointed. Maxilla 1, palp with a small constrietion. Maxilli- 
peds, 4th joint of palp slender, curved. Gnathopod 1 in J, 24 joint short and 
broad, 4 apically squared, 5tk nearly as broad as long, forming a rounded 
lobe behind, with spines along the somewhat flattened hind margin, 6th 
rhomboidal, the long front margin having a slight hump at the centre, the 
hind margin much shorter, making an angle at the widest part of the joint 
before joining the oblique, spinuliferous palm, from which it is defined by 
a palmar spine, which is overlapped by the curved finger. Gnathopod 2 
in Cd, 24 and 34 joints distally lobed in front, 4! with broadly rounded 
apex, 5tk very short, with the little horny-looking process from the hind 
margin on either side more conspicuous than usual, 6!" large, widest where 
the short, smoothly curved hind margin meets the long, very oblique, nearly 
straight, spinulose palm, narrowest at hinge of the long, curved finger, which 
has a strong bulb at base of inner margin. Gnathopods 1 and 2 in © small, 
5th joint short, 6tk oblong, slightly widened at rather oblique, spinulose palm, 
gnathopod 2 rather the larger. Peraeopods 1—5 moderately robust, finger 
with minute inner setule; the oval 24 joint in peraeopods 3—5 nearly smooth 
behind, its wing in peraeopod 5 broadly rounded and somewhat produced 
downward. Uropods 1 and 2 with lateral spines on both rami, in uropod 2 
rami rather stout, unequal. Uropod 3, ramus rather shorter than peduncle. 
Telson with distal half of each lobe triangular. L. 4 mm. 

Paeifie (lat. 88° N., long. 180° E.; lat.5°N., 137° E.); North-Atlantie (Sargasso 
Sea; lat. 26° N., long. 59° W.). 


6. H. maroubrae Stebb. 1899 H.m., T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 v.7 p.405 t.32C. 


Body rather compressed. Pleon segment 3 with postero-lateral corners 
quadrate. Eyes rounded, about the diameter apart, darkish. Antenna 1, 
peduncle short, 1° joint as long as 24 and 34 combined, flagellum of 9 
slender joints. Antenna 2 about half as long as body, flagellum longer 
than peduncle, slender, 19-jointed. Gnathopod 1 in JS, 4tk, 5th and 6th 
joints subequal in length, 6'% oblong, scarcely longer than wide, hind margin 
from near base fringed with spinules, which distally meet a transverse row 
of smaller spinules, across which the short finger closes, as if along a palm, 
but half the distal margin of the 6!" joint extends beyond these in a micro- 
scopically dentieulate lobe at right angles to the hind margin though the 
junction is rounded off. Gnathopod 2 in S, 5tk joint very small, triangular, 
6! very large, broadest proximally, hind margin very short, spine-fringed 
palm very oblique and long, well defined, the long finger nearly reaching 
the 4b joint, its apex passing on inner side of palmar spine into a pocket 
on surface of the joint. Branchial vesicles very small. Peraeopods 1—5 
having on 6!" joint a distal, blunt-headed, partially serrate spine, and between 

36* 


564 Hyale 


this and the finger a spine upbent towards the other, of a peculiar fusiform 
shape. 'The setule on inner margin of finger very small. Uropod 3, ramus 
moderately slender, as long as peduncle, each with apical spines only. es 
with lobes distally somewhat acutely triangular. L. 5 mm. 


Maroubra Bay near Sydney [East-Australia]. 


7. H. graminea (Dana) 1852 Allorchestes? g., J. D. Dana in: P. Amer. Ac., 
v.2 p.208 | 1853 &55 A.? g., J. D. Dana in: U.S. expl. Exp., v. 13m p.897; t.61 
f.5a—b | 1862 A. gramineus, Bate, Cat. Amphip. Brit. Mus., p.46 t.7 f.8 | 1893 Hyale. 
prevostiü (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 519. 


Eyes reniform. Antenna 1 ?/, as long as antenna 2, flagellum slender, 
longer than peduncle, about 14-jointed. Antenna 2 less than half as long 
as body, flagellum stout, much longer than peduncle, joints hardly oblong. 
Gnathopod 1, 6'k joint narrow, slightly broadest at middle, finger long, stout, 
folding against hind’ margin. Gmnathopod 2, 6% joint large, narrowly ovate, 
narrow at finger-hinge, palm setulose, very oblique, not at all convex, 
scarcely defined from the very short hind margin. Peraeopods 1-—5 feebly armed. 
Colour tints of green and yellow, hind legs partly carmine. L. 12—14 mm. 


Tropical Atlantie (Rio Janeiro). 


8. H. hirtipalma (Dana) 1852 Allorchestes h., J. D. Dana in: P. Amer. Ac., 
v.2 p.205 | 1853 & 55 A.h., J. D. Dana in: U. S. expl. Exp., v. 1311 p.888; t.60 f.4 | 
1879 Hyale (A.) h., Wrzesniowski in: Zool. Anz., v.2 p.200 | 1862 A. inca, Bate, Cat. 
Amphip. Brit. Mus., p.40 t.6 f.7 | 1879 Nicea fimbriata, G. M. Thomson in: Tr. N. 
Zealand Inst., v.11 p.236 t.10B f.2 | 1886 N. f., G.M. Thomson & Chilton in: Tr,N. 
Zealand Inst., v. 18 p.144 | 1888 Hyale f. + H. hirtipalma, T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.1705 | 1895 H. f., G. M. Thomson in: Tr. N. Zealand Inst., v.27 
p.211 | 1893 H. prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 519. 


Eyes dark, rather small, subrotund. Antenna 1 half or more than half 
as long as antenna 2, proportionately longer in small specimens, joints of 
peduncle subequal, flagellum much longer than pedunecle, 13—15-jointed. 
Antenna 2 less than half as long as body, ultimate joint of peduncle a little 
longer than penultimate, with a brush of setules on lower margin, flagellum 
longer than peduncle, with 17—22 joints, each with brush of setules. Maxilli- 
peds, 4 joint of palp short, slender, acute. Gmathopod 1, 5!" joint rather 
short and broad, 6!" widening to the palm, which is longer and more oblique 
in a large specimen than in a small, setulose, with palmar spines (stout 
teeth, Thomson), finger fringed within with tiny setules.. Gmnathopod 2, 
5th joint small, 6 very large, subovate, narrowing to finger-binge, palm 
very oblique, densely fringed with setules, finger not nearly as long as 6% joint. 
Peraeopods 1—5 all rather long, 5! and 6th joints without spines on convex 
margin, finger rather short and stout, curved, acute. Peraeopods 3—5, 24 joint 
well expanded. Uropods 1—3 not very long. Uropods 1 and 2, outer ramus 
rather the shorter. Uropod 3, ramus subequal to peduncle. Telson eleft almost 
to the base. Colour pale yellow. L. reaching 20 mm. 


Pacifie (Valparaiso; Island of San Lorenzo [Peru]; Dunedin [New Zealand] ; 
Macquarie Island). 


9. H. macrodactyla Stebb. 1899 H. macrodactylus, T. Stebbing in: Tr. Linn. 
Soe. London, ser.2 ©%.7 p.404 t.81D. 


Side-plates not deep, 1° distally widened, 4! wide, with deep hind 
emargination. Pleon segment 3, postero-lateral corners quadrate, scarcely 
produced. Eyes not large, rounded, wider than diameter apart. Antenna l, 


Ba SE a neh, 


2 al ee re De 


Hyale 565 


pedunele short, 1% joint subequal to 24 and 34 combined, flagellum with 13 joints, 
of which the proximal are short. Antenna 2 more than half as long as body, 
ultimate joint of peduncle longer than the short penultimate, flagellum 25-jointed. 
Gnathopod 1 in J, 24 joint short, broad except at base, 39 with small front lobe, 
5th with small hind lobe, 6 oblong oval, palm oblique, spinulose, separated 
from hind margin by rounded angle carrying a palmar 
spine, against the inner side of which the apex of finger 


closes. Gnathopod 2 in S (Fig. 96), 24 joint lobed zes 
at distal end of front margin, 34 lobed in front, 5% joint 
rounded apex of 4tk touching the base of 6th, rein 


6'h elongate, widest at base, front margin smoothly 
eurved, palm celosely fringed with slender spinules, 
extending almost whole length of joint, nearly 
straight, but with an emargination between two slight 
swellings, one of which adjoins the finger-hinge, Fig. 96. H. macrodactyla, 3. 
the long, blunt, slightly sinuous finger capable of RE? 
touching apex of 4" joint. Ina specimen, which appears to bea young J, the 
oblique palm is straight, finger matching it. Gnathopods 1 and 2 inQ, 6% joint 
narrowly oblong. Peraeopods 1—5, 6!" joint at inner apex carrying a strong 
blunt spine, with a similar much shorter one below it, finger curved, inner 
setule minute. Peraeopods 3 and 5, 24 joint somewhat orbieular. Peraeopod 4, 
24 joint oblong oval, rather wider above than below. Uropods 1 and 2, both 
rami with lateral spines. Uropod 3, ramus as long as pedunele. Telson cleft to 
base, lobes bluntly triangular. L. about 4 mm. 


Tropical Atlantie (St. Thomas’ harbour; Rio Janeiro). 


10. H. aquilina (A. Costa) 1857 Amphithoe a., A. Costa in: Mem. Acc. Napoli, 
v.1 p.202 t.2 f.7 | 1895 Hyale a., A. Della Valle in: F. Fl. Neapel, v.20 p.523 t.16 
f. 43—47 | 1862 Allorchestes pereiri (part.), Bate, Cat. Amphip. Brit. Mus., p.42 | 1866 
Nicea fasciculata, Cam. Heller in: Denk. Ak. Wien, ©.26u p.6 t.1 f.10—12 | 1879 


'Hyale f., Wrzesniowski in: Zool. Anz., v.2 p.202 | 1888 H. gazella (part.), T. Stebbing 


in: Rep. Voy. Challenger, v.29 p. 297. 
Side-plate 1 broader than deep. Antennal half as long as antenna 2 or a 


. little more, flagellum twice as long as peduncle, 15- or 16-jointed. Antenna 2 


about °/, as long as body or a little less, ultimate joint of pedunele rather 
longer than penultimate, flagellum fully twice as long as peduncle, 30—32- 
jointed. Maxillipeds, 34 joint of palp setose, 4! acute. Gmathopod 1 in CS 
small, 5tt and 6tk joints subequal or 5% joint a little longer, 6!" subrotund, 
about as broad as long, palm a little sinuous, spinose, almost transverse, 
finger compressed, laminar, dilated from the base towards the apex, which 
is constrieted, ending in a curved point, produeing resemblance to a hawk’s 
bill. Gnathopod 2 in J robust, oblong oval, palm oblique, not strongly defined 
(Heller: with a small defining tuberele). Gmnathopods 1 and 2 in © similar, 
but 6% joint rather stouter in gnathopod 2; both gnathopods having 5t% joint 
triangular, shorter than oblong 6%, finger slender, curved. Uropod 3, ramus 
shorter than peduncle. Telson small, lobes conical. L. 8 mm. 


Mediterranean; Adriatie. 


11. H. prevostii (M.-E.) 1830 Amphithoe p., H. Milne Edwards in: Ann. Sei. 
nat., v.20 p.378 | 1862 Nicea p., Bate, Cat. Amphip. Brit. Mus., p. 53 | 1866 Allorchestes 
prevosti, E. Grube in: Arch. Naturg., v. 821 p.386 | 1888 Hyale prevostii, T. Stebbing 
in: Rep. Voy. Challenger, v.29 p.144 | 1893 H.p. (part.), A. Della Valle in: F. Fl. 


566 Hyale 


Neapel, v.20 p.519 t.2 £.6; t.16 f. 23—42 | 1843 Amphithoe p., A. nilssonü, H. Rathıke 
in: N. Acta Ac. Leop., 9.201 p.81 t.4 £.5a—ex; p.264 | 1861 Allorchestes n., Bate & 
Westwood, Brit. sess. Crust., ©.1 p.40 f. | 1876 Hyale nilssoni, T. Stebbing in: Ann. 
nat. Hist., ser. 4 v.17 p.337 t.18 f.1a—h | 1890 H.n., G. O. Sars, Crust. Norway, v.1 
p.26 t.ı1l f£.1 | 1887 H. nilsoni (part.) + H.n. var. minor, Chevreux in: Bull. Soc. 
zool. France, v.12 p.298, 294 | 1888 H.n. + H.n. var. major, Chevreux in: Bull. Soe. zool. 
France, v.13 p.32 | 1893 H. n., Chevreux & E. L. Bouvier in: Ann. Sei. nat., ser. 7 v.15 
p. 111 | 1845 Orchestia nidrosiensis, Kroyer in: Naturh. Tidsskr., ser.2 v.1 p.299 | 1857 
Allorchestes danai, Bate in: Ann. nat. Hist., ser.2 o.19 p. 136. 

Back smooth. Side-plates with lower margin smooth, side-plate 1 widened 
below. Pleon segment 3, postero-lateral corners obtusely quadrate. Eyes 
small, round, black; (large, oval in var. major). Antenna 1 in O nearly 
as long as antenna 2, flagellum 6-jointed, in JS flagellum sometimes with 
10 joints, reaching considerably beyond peduncle of antenna 2. Antenna 2 
in J, flagellum 15-jointed. Gmnathopod 1 in JS, 5% joint distally some- 
what widened, not produced along hind margin of 6'h, 6th oblong, hind 
margin with spinules from the base to a submedian spine, palm slightly oblique, 
rounded off. Gnathopod 2 in JS, 7*b joint robust, broadest proximally, front 
margin very convex, bind margin with various spinules but no conspieuous 
notch, palm rather oblique, somewhat sinuous, well defined, finger elosing 
between two rows of spines to the terminal cavity of the palm, which is 
armed with minute spines. Gnathopod 1 in 2 nearly as in d. Gmathopod 2 
in 9 like gnathopod 1, but rather larger, 5t% joint more expanded distally. 
Peraeopods 1—5 with numerous spines and setae, but none of exceptional 
size, the 6% joint having besides others an apical and a subapical one minutely 
hooked at tip and opposable to the strong eurved finger. Peraeopods 3—5, 
24 joint expanded with smooth hind margin. Peraeopods 4 and 5, 6! joint 
with group of setae and spine at middle of hind margin. Uropods 1 and 2, 
rami short, with marginal and strong apical spines. Uropod 3 small, ramus 
much shorter than peduncle. Telson divided into 2 obtuse lobes with 
their surfaces adjacent. Colour green with metallic lustre. L. 6—8 mm 
(almost double in var. major). 

North-Atlantie and adjoining seas (Europe; Azores). In sea-weed between the 
high-water marks respectively of neap- and spring-tides; var. major at low-tide. 


12. H. grandicornis (Kroyer) 1845 Orchestia g., O. longicornis, Kroyer in: 
Naturh. Tidsskr., ser.2 v1 p.292; t.1 f.2a—n | 1851 Allorchestes g., F. Brandt in: 
Bull. phys.-math. Ac. St.-Petersb., ».9 p. 142 | 1888 Hyaleg., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.210 | 1849 Nicea lucasii, H. Nicolet in: Gay, Hist. Chile, v.3 p. 238; 
Crust. t.2 f£.7 | 1852 Allorchestes vertieillata + A. peruviana, J. D. Dana in: P. Amer. Ac,, 
v.2 p.205, 206 | 1862 A.vertieillatus, A. verticellatus, Bate, Cat. Amphip. Brit. Mus., p.43 
t.7 £.1 | 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 519. 

Side-plate 1 somewhat produced forward, front margin faintly concave, 
angle broadly rounded (in Nicolet’s figure subacute). Pleon segment 3, 
postero-lateral corners quadrate, but not acutely so. Eyes rather large, dark, 
subrotund, sometimes approximate at top of the head. Antenna 1 about '/, 
as long as body, more than half as long as antenna 2, joints of peduncle 
successively shorter, flagellum much longer than peduncle, 12-jointed. An- 
tenna 2 about '/, as long as body, with small but discernible gland-cone, 
ultimate joint of peduncle a little longer than penultimate, flagellum longer 
than pedunele, longer and stouter than flagellum of antenna 1, but some- 
times with only 12 joints. Upper lip, distal margin almost straight truncate, 
with rounded corners. Maxillipeds, 4 joint of palp a slender pointed 
setuliferous finger. Gnathopod 1 in C, 24 jeint narrow at base, thence to 


r nie tr I it 


u rn ra a FE 
er er. “ 


Hyale 567 


the middle greatly widening, 5!" joint sending out a lobe behind, fringed 
with spinules and not reaching the apex,. but resting in the concave distal 
margin of the 4" joint; 6th narrowly oblong, with spinuliferous indent near 
apex of hind margin, palm convex, slightly oblique, a little overlapped by 
finger. Gmathopod 2 in G, 24 joint not broad, 4 rather produced behind, 
and helping the small obscure 5th to form a eup for heart-shaped base of 
the large oval 6% joint, of which the spinose palm is oblique, nearly straight, 
ending in a pocket, where it meets the short hind margin, which ends in a sort 
of double tuberele carrying 2 palmar spines; the finger powerful, its apex 
elosing into the pocket. Gnathopods 1 and 2 in Q resembling one an- 
other and gnathopod 1 in JS; gnathopod 2 rather the larger. Peraeopod 3 
stouter but not longer than peraeopods 1 and 2; peraeopod 4 rather stronger 
tban peraeopod 5; 24 joint in peraeopods 3—5 oblong oval, more rounded 
in peraeopod 3, widest in peraeopod 5 with somewhat angular hind margin, 
in. peraeopod 4 hind margin closely fringed with small spinules; 4 joint 
having tufts of spines on hind margin in all 3 peraeopods. In peraeopods 
1—5 finger strong, curved, concave margin mieroscopically peetinate, teeth 
larger towards the nail. Pleopod 1, rami longer than peduncle, 15- or 
16-jointed. Uropod 1, peduncle rather longer than rami, with a strong 
apical spine, outer ramus with only apical spines. Uropod 2, peduncle 
rather shorter than rami. Uropod 3, ramus apically truncate, shorter than 
peduncle. Telson cleft to the base, each lobe triangular from centre to apex, 
inner margin straight. Colour green to greyish or brownish. L. 8—12 mm. 


_South-Paeifie (Valparaiso). 


13. H. novaezealandiae (G. M. Thoms.) 1879 Nicea n., G. M. Thomson in: 
Tr. N. Zealand Inst., v. 11 p.285 t.10» f.1a—f | 1888 Hyale n., T. Stebbing in: Rep. 
Voy. Challenger, v.29 p.500 | 1895 H.n., 6. M. Thomson in: Tr. N. Zealand Inst., 0.27 
p. 211 | 1886 Nicea neo-zelanieca, G. M. Thomson & Chilton in: Tr. N. Zealand Inst., 
v.18 p.144 | 1898 Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 520. 


Very near to H. grandicornis, but distinet in the following respeects. 
Gnathopod 1 in S larger, hind lobe of 5*% joint larger, more produced, 
apical, 6% joint broader. Gmathopod 2 in S, 24 joint distally a little 
widened and lobed. Peraeopods 3—5, 4% joint having the spines along 
hind margin solitary, not grouped. Peraeopod 4, 24 joint nearer to the 
rounded form in 24 joint of peraeopods 3 and 5, its hind margin also 
almost smooth and not spinulose. Peraeopods 1—5, microscopical pectination 
of concave margin of finger more faint, the customary setule stronger, than 
in H. grandicornis. Uropod 1, both rami with strong marginal spines. Colour 
yellowish, marbled with red. L. 12—14 mm. 


South-Paeifie (Otago Harbour [New Zealand], rock pools; Macquarie Island). 


14. H. grimaldii Chevreux 1891 H. g., Chevreux in: Bull. Soc. zool. France, 
v.16 p.257 £.1—5 | 1895 H. prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.889. 


Side-plates 1—4 deep. Pleon segment 3, postero-lateral corners 
quadrate. Eyes of moderate size, subrotund, black. Antenna 1, peduncle 
short, flagellum 9- or 10-jointed in 9, 7-jointed in ©. Antenna 2 '/, as 
long as body, very stout, ultimate joint of peduncle rather longer than 
penultimate, flagellum 17—23-jointed in C, 12-jointed in 9; the distal 
joints in all the flagella somewhat elongate. Gnathopod 1 in J, 5tk joint 
with spine-fringed lobe, 6! oblong, but a little widened at base, palm almost 
transverse, finger overlapping its rounded angle. Gnathopod 2 in J large, 


568 Hyale 


24 joint with front distal end forming a very broad rounded lobe, 34 with 
similar lobe, 4th pluntly pointed, completely masking the small 5th, 6th very 
'broad, oblong, widest proximally, palm well defined, not very oblique, with 
rounded tooth near finger-hinge, finger strong. Gnathopod 1 in Q, 24 joint 
a little widened distally, 5t" with spine-fringed lobe, distally wider than 6th, 
which is rather narrowly oblong, slightly widened at palm, finger very little 
longer than palm. Gnathopod 2 in © like gnathopod 1, marsupial plates 
very long, rather broad in the middle, fringed with short setae. Peraeopods 
1—5, 6! joint with spines at 5 points of inner margin, finger short, curved, 
inner setule minute. Peraeopods 1 and 2, 4th joint rather expanded. 
Peraeopods 3—5, 4 joint strongly expanded, stoutly spined on both 
margins, 5tk expanded distally with group of apical spines on hind margin. 
Peraeopods 3 and 5, 24 joint broadly oval. Peraeopod 4, 24 joint oblong, with 
rounded angles, hind margin almost straight. Uropod 2, outer ramus shorter 
and narrower than inner. Uropod 3, ramus shorter than peduncle. Telson 
cleft to the base, the lobes of moderate size, apically narrowed, or (Chevreux) 
remarkably large, apically inflated. Colour orange brown, antennae and legs 
violet-rose. L. about 6 mm. 


North-Atlantie (lat. 42° N., long. 24° W.; lat. 38° N., long. 64° W.); West- 
Mediterranean. On floating objects and Thhalassochelys. 


15. H. crassicornis (Hasw.) 1879 Allorchestes c., Haswell in: P. Linn. Soc. 
N.S. Wales, 0.4 p.252 t.7 f.5 | 1885 A. c., Haswell in: P. Linn. Soc. N. S. Wales, v.10 
p-95 t.10 f.2—5 | 1893 Hyale pontica (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p.528. 


Body slender. Pleon segment 3, postero-lateral corners quadrate. 
Eyes oval, dark, very near together above. Antenna 1 slender, reachiug 
beyond peduncle of antenna 2, 24 joint rather shorter than 1%, 34 searcely 
shorter than 24, peduncle ?/, as long as the 11-jointed flagellum. Antenna 2 
about !/, as long as body, very stout, ultimate joint of peduncle much 
longer than penultimate, flagellum tapering, rather longer than peduncle, 
with 13 joints, of which the proximal are very thick, peduncle and flagellum 
plumose. Gnathopod 1, 5% joint triangular, with spinules on rounded apex, 
6th oblong, slightly widened distally, spinuliferous on distal half of hind 
margin, palm transverse, finger strong, matching palm. Gnathopod 2, 6th 
joint large, oblong, but with rather oblique, well defined, spinulose palm, 
over which the finger folds elosely, not quite reaching the end. Peraeopod 
3 short, 4 and 5th subequal, spines not strong. Uropod 3 short, ramus 
as long as peduncle. Lobes of telson blunt. — L. about 10 mm. 


South-Paeifie (Kiama [New South Wales]). Between tide-marks. 


16. H.pontica H. Rathke 1837 H.p., H. Rathke in: M&m. pres. Ac. St.-Petersb., 
v.3 p.378 t.5 f.20—28 | 1862 H.p., Bate, Cat. Amphip. Brit. Mus., p.87 t.14a £.1| 
1888 H.p., T. Stebbing in: Rep. Voy. Challenger, v. 29 p. 163, 499 | 1840 Amphitoe p., 
H. Milne Edwards, Hist. nat. Crust., ©.8 p.37 | 1875 Nicea p., Catta in: Rev. Sci. nat., 
v.4 p.166 | 1856 Galanthis lubbockiana, Bate in: Rep. Brit. Ass., Meet. 25 p.57 t.17 
f.7 | 1857 Allorchestes imbricatus + @.1., Bate in: Ann. nat. Hist., ser.2 v.19 p.136 | 
1861 Nicea I., Bate & Westwood, Brit. sess. Orust., v.1 p.47 f. | 1876 Hyalel., T. Stebbing 
in: Ann. nat. Hist., ser.4 v.17 p.837 t.18 f.2,a—d | 1890 H. 1, G. 0. Sars, Crust. 
Norway, v.1 p.27 t.11 f.2 | 1895 H.1., A. M. Norman in: Ann. nat. Hist., ser. 6 v.15 
p-479 | 1871 H. nilsoni (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.94 | 1872 & 76 
H.n., H.nilssonii, A. Boeck, Skand. Arkt. Amphip., ©.1l p.109 t.3 f.3; „2 p.712 | 1879 
H. imbricata, Wrzesniowski in: Zool. Anz., v.2 p. 202. 


et y. 


u N a TA Tr 2, 


Hyale 569 


Segments of body imbricated, integument firm. Side-plates with lower 
margin slightly erenulate. Pleon segment 3, postero-lateral corners quadrate, 
but not acutely. Eyes of moderate size. Antennae l and 2 in © subequal. 
In S antenna 1 considerably shorter than antenna 2, but reaching much beyond 
pedunele of latter, flagellum longer than pedunele, with 11 joints, most of 
them distally widened. Antenna 2 in C, ultimate and penultimate joints of 
peduncle subequal, flagellum 15-jointed. Gnathopod I in CS, 5tk joint in adult 
strongly produced along hind margin of 6tk, 6th oblong, surface not far from 
base armed with a broad spine, distal part of hind margin fringed with 
spinules, palm transverse, rounded off but armed with a stout spine, finger 
matching palm. Gmathopod 2 in J, 6th joint robust, broadest proximally, 
front very convex, hind margin nearly straight, with small spinulose notch, 
palm slightly oblique, with small eavity not far from hinge, well defined, 
bordered with spinules and setules and having 2 palmar spines in a terminal 
cavity, the finger elosing down on the inner side of these spines. Ghatho- 
pod 1 in oO, 5t& joint distally wider than 6%, 6tk oblong, with spinules at 
noteh of hind margin and also at apex, palm slightly oblique. Gmathopod 2 
in © similar to gnathopod 1, but larger, 5th joint more produced. Peraeo- 
pods 1—5 robust, 6" joint earrying a large, straight, subapical spine, serrate, 
tipped with a little hook, and opposable to the strongly ceurved finger; nearer 
the base the 6tk joint has a much smaller spine and at the apex one resembling 
the subapical, on a much smaller scale. Peraeopods 3—5, 24 joint broadly 
expanded, with erenulate hind margin, 6% joint with hind margin unarmed. 
Uropod 1, outer ramus rather shorter than inner, both with marginal spines. 
Uropod 3, ramus a little shorter than pedunele, with apical spinules. Telson 
divided into 2 obtuse-ended lobes, which have their surfaces adjacent. Colour 
bluish grey or almost black, or yellowish, or darkish green. L. 7 mm. 


North-Atlantie and North-Sea (England, France, West-Norway); Mediterranean 
(Algeria). 


17. H. media (Dana) 1853 & 55 Allorchestes m., J. D. Dana in: U. S.expl. Exp., 
v.13m p.898; t.61 f.4a—g, I—n | 1862 A. medius, Bate, Cat. Amphip. Brit. Mus., p. 46 
t.7 £.9 | 1879 Hyale (A.) media, Wrzegniowski in: Zool. Anz., v.2 p.200 | 1893 H. pontica. 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 524. 


Side-plates 1—5 wide, not deep. Pleon segment 3, postero-lateral 
corners quadrate, scarcely produced. Eyes apparently variable in shape and 
size. Antenna 1, pedunele short, flagellum 10—14-jointed. Antenna 2, 
ultimate joint of pedunele rather longer than penultimate, both rather short, 
flagellum 16-jointed. Gnathopod 1 in C, 24 joint strongly widening from 
very narrow base, 5tk with rounded fringed lobe, not produced along the 6th, 
6th oblong, margins parallel, hinder with median spinules, finger a little 
overlapping slightly oblique palm. Gnathopod 2in J, 24 joint distally widened, 
34 lobed in front, 6tk large, subovate, widest before reaching the oblique well 
defined palm. Gnathopods 1 and 2 in © about as in H. rubra (p. 572). Peraeo- 
pods 1—5 robust, finger curved, inner setule minute. Peraeopods 1 and 2, 
6% joint having on inner apex a stout, smooth spine, which is widest at its apex. 
Peraeopods 3—5 with a very large submedian serrate spine, like that which 
is a distinguishing feature in H. pontica, but higher up on the margin; at 
the apex a small spine curves towards the smooth finger. Peraeopods 3 
and 5, 24 joint rotund, in peraeopod 5 very broad; peraeopod 4, 24 joint 
tending to oblong; in all 3 the hind margin nearly smooth, except for one 
pronounced indent. Pleopods with 2 short broad coupling hooks and 


N Be; 
x ar A 
al 
, 


570 Hyale 


3 eleft spines. Uropods 1 and 2 rather short. Uropod 3, ramus as long as 
peduncle. Telson eleft to base, lobes triangular. L. 6—12 mm. 

Atlantie (Rio Janeiro, harbour; Virgin Island St. Thomas; Cape Verde Islands; 
Tierra del Fuego?). 

18. H. perieri (H. Luc.) 1846 Orchestia p., H. Lucas in: Expl. Algörie, p.52 
t.5 f.1 | ?1866 Allorchestes p., E. Grube in: Arch. Naturg., v.321 p.382 t.9 f.2 | 1862 
A. pereiri (part.), Bate, Cat. Amphip. Brit. Mus., p.42 t.6 f.10 | 1866 Nicea macronys, 
Cam. Heller in: Denk. Ak. Wien, v.2611 p.9 t.1 f.21—24 | 1879 Hyale m., Wrzesniowski 
in: Zool. Anz., ®2 p.202 | 1868 Nicea perieri + N. p. var. pontica (non Hyale pontica 
H. Rathke 1837!) + AN. perieri var. brevicornis, Czerniavski in: Syezda Russ. Est., Syezda 
1 Zool. p.116 t.8 f.26, 27 | 1875 N. prevostii (part.), Catta in: Rev. Sci. nat., v.4 p.166 | 
1893 Hyale p. (part.), A. Della Valle in: F. Fl. Neapel; v.20 p. 519. 

Eyes oval, or reniform, black, nearly meeting at top. Antenna 1 reaching 
a little beyond peduncle of antenna 2, flagellum with 10 or 11 joints, all 
eylindrie, longer than broad. Antenna 2 half as long as body, almost 
completely unarmed, flagellum considerably longer than pedunele, with 16 
or 17 eylindric joints, the proximal short, the following longer. Maxillipeds, 
34 joint of palp feebly setose over base of finger, more strongly on inner 
side. Gnathopod 1, 5tk joint rather shorter than 6%, 6b oblong, hind margin 
with setose submedian notch, palm almost transverse, finger slightly curved, 
slender, acute. Gmathopod 2 in J, 4 joint rather acutely produced to touch 
the 6th; 6th Jarge, almost piriform, the oblique, setulose palm passing gradually 
without interruption into the shorter hind margin (Heller’s description, but in 
Heller’s figure palm well defined by a cavity and 2 palmar spines; also 
well defined in Lucas’ figure); finger well curved, its point closing against 
the inner surface. Gnathopod 2 in O, 5t% joint forming a long and thin 
process between 4 and 6th joints, 6 more of an oval, with shorter palm. 
Peraeopods 3—5 slender, 6t" joint rather long, almost straight, finger strong, 
apically bent, the inner setule conspieuous. Colour dull yellow. L. 95—8, 
S 6—15 mm. 

Mediterranean, Adriatie, Black Sea, tropical Atlantie (Virgin Island St. Thomas). 


19. H. camptonyx (Heller) 1866 Nicea c., Cam. Heller in: Denk. Ak. Wiesn, 
v.2611 p.10 t.1 f. 25—80 | 1879 Hyale c., Wrzesniowski in: Zool. Anz., v.2 p.202 | 1893 
H. prevostii (part.), A. Della Valle in: F. Fl. Neapel, 0.20 p.519. 

Back rounded. Side-plates 1—4 moderately large, 1% slightly widened 
distally, 24 square. Pleon segment 3, postero-lateral corners quadrate with 
small produced point. Eyes small, subrotund, wider than the diameter apart. 
Antenna 1 reaching beyond middle of flagellum of antenna 2, peduncle 
short, 1 joint as long as 24 and 34 combined, flagellum long, 12—16-jointed. 
Antenna 2 half as long as body, ultimate joint of pedunele longer than 
penultimate, flagellum with 25—26 joints, the earlier'short, the distal longer. 
In young from mother’s pouch antenna 1 with flagellum of 3 joints, much 
shorter than antenna 2 with 5-jointed flagellum. Maxillipeds, 4 joimt of 
palp as long as 34, with apical seta m d longer than the joint. Gmatho- 
pod 1 in d, 24 joint rather broad except proximally, 5% shorter than 6th, 
distal lobe fringed with spines, 6% oblong, slightly wider at base, front 
margin convex, hind straight, with group of spinules at centre, finger over- 
lapping convex, oblique, ill-defined palm. Gnathopod 2 in d, 24 joint with 
distal half of front expanded, 34 forming a small lobe, 4! and 5tk very 
short, 6! Jarge, oblong oval, widest near base, palm spinose, somewhat 
oblique, defined by a blunt tooth or an abruptly transverse space from the 
straight hind margin, finger entering pocket at end of palm. Gmnathopod 1 


Hyale 571 


in 9, 24 joint narrower than in d', 6 not wider at base than distally. 


Gnathopod 2 in © like gnathopod 1, but 24 joint rather more expanded 
distally; marsupial plates long, broad, fringed with long setae. Peraeopods 
1—5 rather robust, 6% joint slightly curved, concave margin spinose, convex 
unarmed, finger strong, ceurved, inner setule very small. Peraeopod 3, 24 
joint subrotund; peraeopod 4, 24 joint oval; hind margin in these peraeopods 
nearly smooth. Peraeopod 5, 24 joint large, subrotund; hind margin pro- 
duced below 3% joint, rather strongly cerenulate. Uropods 1—3 short, ramus 
of uropod 3 shorter than pedunele. Telson small, each half. rather longer 
than breadth at base, apex blunt, narrow. L. about 6 mm. 

Mediterranean; Adriatic; North-Atlantie (Portugal; Azores). In sea-weed and on 
a floating log. 

20. H. schmidtii (Heller) ?1862 Allorchestes microphthalmus, Bate, Cat. Amphip. 
Brit. Mus., p.39 t.6 £.6 | 1866 Nicea schmidtii, Cam. Heller in: Denk. Ak. Wien, 0.2611 


‚p-11 t.1 f.31, 32 | 1879 Hyale s., Wrzesniowski in: Zool. Anz., v.2 p.202 | 1893 H. 


prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 520. 


Near to H. camptonyx. Antenna 1, flagellum 14- or 15-jointed. 
Antenna 2 ?/, as long as body, flagellum 32—40-jointed. Maxillipeds, 4th 
joint of palp not quite as long as 34, apical seta short. Gnathopod 1 ind, 
6th joint suboval, being broader than in the other species, and the spinules 
on hind margin less close together, finger long. Gnathopod 2 in J, 24 joint 
with front margin straight, produced below into a small lobe, 34 joint with 
well marked front lobe, 6% joint with very oblique palm, making an angle 
with hind margin, but not defined by tooth or transverse space. _Peraeopods 
3—5, 6% joint strong, eurved, finger long, acute, and without(?) inner setule. 
Peraeopod 5, 24 joint with hind margin almost smooth. Uropod 3, ramus 
not very much shorter than peduncle L. 7 mm. 


Mediterranean; Adriatie; North-Atlantie (Portugal). 


21. H. nigra (Hasw.) 1879 Allorchestes niger, Haswell in: P. Linn. Soc. N.S. 
Wales, v.4 p.319 | 1885 A.n., Haswell in: P. Linn. Soe. N.S. Wales, v.10 p.96 t.11 
f.1—3 | 1893 Hyale (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 528. 


Very similar to H. camptonyx. Pleon segment 3, postero-lateral 
corners acutely quadrate, slightly produced. Eyes round, sometimes tending 
to oval. Antenna 1 reaching much beyond peduncle of antenna 2, peduncle 
short, 24 joint much shorter than 1%, 34 than 24, flagellum much longer 
than peduncle, 9—11-jointed. Antenna 2 about half as long as body, 
slender, flagellum very much longer than peduncle, joints in J reaching 25 
in number. Gnathopod 1, 5tk joint with fringed rounded process not elasping 
base of 6th, 6th oblong, rather narrow, with median group of spinules on 
hind margin, palm short, slightly oblique. Gnathopod 2 in J, 34 joint with 
well developed lobe in front, 4! with apex rather acütely produced, 6 large, 
broadly oblong oval, palm spinulose, oblique but shorter than hind margin, 
well defined by a small tooth, finger fringed with setules on inner margin 
and having a strongly projeeting bulb at its base. Gmnathopods 1 and 2 
in © small, very like one another and the gnathopod 1 in d. Peraeopods 
1—5 moderately robust, not strongly armed, the broad 24 joint of peraeopod 5 
with erenulate hind margin. Uropods 1 and 2 rather stout. Uropod 3 very 
small, the ramus very short, much shorter than the peduncle. Telson small, 
eleft almost to base, the lobes not very broad apically. Colour blackish 
purple or brown. L. 5 mm. 


Port Jackson [East-Australia]. Among sea-weed. 


572 Hyale 


22. H. rubra (G. M. Thoms.) 1879 Nicea r., G. M. Thomson in: Tr. N. Zealand 
Inst., ©. 11 p.236 t.10» f.3 | 1886 N. r., G.M. Thomson & Chilton in: Tr. N. Zealand 
Inst., v.18 p.144 | 1888 Hyale r., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 500 | 
1893 H. prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 520. 


Side-plates 1—4 rather deep. Pleon segment 3, postero-lateral corners 
a little outdrawn, acute. Eyes irregularly rounded. Antenna 1 half as long as 
antenna 2, pedunele very short, flagellum with 22 joints in J, fewer in Q, with 
sensory filaments in both. Antenna 2 half as long as body or more, ultimate 
joint of pedunele rather longer than penultimate, flagellum thrice as long as 
peduncle, with 40—60 joints or more in d, with 36 in 9. Gnathopod 1 
in S, 5th joint with well rounded lobe of hind margin, 6t oblong with 
slightly convex margins, palm little oblique, finger slightly overlapping. 
Gnathopod 2 in C, 6tk joint very large, broadly oval, hind margin well 
developed, palm oblique, finger thick at base (Thomson: with 2 tubercles 
at the joint), elosing tightly between 2 rows of spinules. Gnathopods 1 and 2 
in O alike, 6th joint rather longer in gnathopod 2, oblong, front margin 
slightly convex, hind margin with 1 small notch, palm a little oblique, 
scarcely or little overlapped by finger. Peraeopods 1—5, spines on inner 
margin of 6tk joint apically serrulate, encreasing in size to the antepenultimate, 
thence diminishing, setule on finger small. Peraeopods 4 and 5 decidedly 
longer than the preceding peraeopods, 24 joint in peraeopod 5 broadly ex- 
panded, the rounded hind margin crenulate. Uropods 1—3 and telson of 
the usual character. Uropods 1 and 2 with lateral spines on both rami. 
Colour pink. L. 8—9 mm. 


South-Paeifice (New Zealand). 


H. babirussa (A. Costa) 1857 Amphithoe b., A. Costa in: Mem. Ace. Napoli, 
v.1 p.201 t.2 f.5 | 1862 Allorchestes babicus (laps., corr.: babirussa), Bate, Cat. Amphip. 
Brit. Mus., p.50 | 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 519. 


Bay of Naples. 


H. bucchichi (Heller) 1866 Nicea b., Cam. Heller in: Denk. Ak. Wien, v. 2611 
p-7 t.1 f.13—15 | 1888 Hyale b., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 366, 
1705 | 1893 H. prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 519. 


Maxillipeds, 4th joint of palp very short, thiekened at the base. L.92 7, & 8 mm. 
Adriatie (Lesina). 
H. gazella (A. Costa) 1857 Amphithoe g., A. Costa in: Mem. Acc. Napoli, v.1 


p.202 t.2 f.6a—e | 1862 Allorchestes g., Bate, Cat. Amphip. Brit. Mus., p.50 | 1893 
Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 519. 


Bay of Naples. 


H. georgiana (Pfeff.) 1888 Allorchestes georgianus, Pfeffer in: Jahrb. Hamburg. 
Anst., 0.5 p.77 t.1 £.la—n, 4 | 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. 
Neapel, ».20 p. 520. " 


Probably identical with H. hirtipalma (p.564). L. about 16 mm. 
South-Atlantie (South Georgia). At-low-tide, under stones. 


H. gracilis (Dana) 1852 Allorchestes g., J. D. Dana in: P. Amer. Ac., 0.2 p.205 | 
1853 & 55 A.g., J. D. Dana in: U.S. expl. Exp., v.18u p.889; 1.60 f.5a—d | 1893 
Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 519. 


Gnathopod 2, 4th joint very acutely produced behind the small 5th, L. 12—16 mm. 
Trepical Paeifice (Tongatabu). Shallow water among sea-weeds. 


DE 
De a 


| 
E 
5 
2 


a a 
ne 


ar 


14 wo LE 6 ER Fa ce 


Hyale 573 


.  H.hawaiensis (Dans) 1853 & 55 Allorchestes h., J. D. Dana in: U. S. expl. 
Exp., v.13u p. 900; t.61 f.5a—h | 1893 Hyale prevostii, (part. d 4 A. Della Valle in: F. Fl. 


‚Neapel, v.20 p. 519. 


L. about 9 mm. 
Tropical Paeifie (Hawaiian Island of Maui). 


H. helleri (Grube) ?1864 Allorchestes imbricatus (juv.) (err., non Bate 1857!), 
E. Grube, Lussin, p. 72 | 1866 A. helleri, E. Grube in: Arch. Naturg., v. 321 p. 384 t.9 
f.3 | 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 520. 


Approximate to the larger H. nudicornis. L. 3—5 mm. 
Adriatic. 


H. nudicornis (Heller) 1866 Nicea n., Cam. Heller in: Denk. Ak. Wien, 0.2611 
p-8 t.1 £.16—19 | 1879 Hyale n., Wrzesniowski in: Zool. Anz., v.2 p.202 | 1893 H. 
prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 519. 


Possibly identical with Parhyale faseigera (p. 556), but uropod 3 not described. 
Gnathopod 1 in G, . stout and strong, swollen in the middle, the point over- 
lapping palm. 


Adriatie. 


H. orientalis (Dana) 1853 & 55 Allorchestes o., J. D. Dana in: U.S. expl. Exp., 
v.13 p. 896; t.61 f.2a—h | 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, 


0.20 p. 519. 


Antenna 1, flagellum moniliform. L. about 6 mm. 
Sooloo Sea (off the harbour of Soung). 


H. piedmontensis (Bate) 1862 Allorchestes p., Bate, Cat. Amphip. Brit. Mus., 
p-35 t.la £.5 | 1879 Hyale (A.) p., Wrzesniowski in: Zool. Anz., v.2 p.200 | 1893 
H.? p., A. Della Valle in: F. Fl. Neapel, v.20 p. 529. 


Perhaps young of H. prevostii (p. 565). Gnathopod 1 rather larger than gnatho- 
pod 2. L. under 4 mm, 


Coast of „Piedmont“. 


H. pugettensis (Dana) 1853 & 55 Allorchestes p., J. D. Dana in: U. S. expl. 
Exp., v.13u p.901; t.61 £.6a—d | 1857 A.p., Stimpson in: Boston J. nat. Hist., v. 6 
p.518 | 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 519. 


Puget’s Sound [North West America]. 


H. rudis (Heller) 1866 Nicea r., Cam. Heller in: Denk. Ak. Wien, v. 261 p.12 
t.1 f£.33 | 1879 Hyale r., Wrzesniowski in: Zool. Anz., v.2 p.202 | 1893 H. prevostiü 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 520. 


Peraeopods 3—5, 6th joint straight, slender, finger short, with small setule on 
inner margin. 
Adriatie (Lesina). 


H. rupicola (Hasw.) 1879 Allorchestes r., Haswell in: P. Linn. Soe. N. S. Wales, 
©.4 p.250 t.8 f.1 | 1885 A. r., Haswell in: P. Linn. Soc. N. S. Wales, v.10 p.95 t.10 
f. 9—12 | 1893 Hyale r., G. M. Thomson in: P. R. Soc. Tasmania, 1892 (p.18) | 1893, 
A. Della Valle in: F. Fl. Neapel, v.20 p. 529. 


Very closely allied to H. perieri (p. 570). Peraeopods 1—5 with very conspieuous 
setule on inner margin of finger. L. 9 mm. 


South-Paeifie (Port Jackson and Botany Bay [East-Australia]; Tasmania?). 


574 Hyale, Hyalella 


H. seminuda (Stimps.) 1857 Allorchestes s., Stimpson in: P. Calif. Ac., v.1 
p. 90 | 1857 A. s., Stimpson in: Boston J. nat. Hist., 0.6 p.518 | 1898 Hyale prevostii 
(part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 529. 


Bay of San Franeisco. Littoral zone. 

H, stebbingi Chevreux 1888 H.s., Chevreux in: Bull. Soe. zool. France, v.18- 
p. 32 | 1888 H.s., T. Barrois, Cat. Crust. Acores, p. 33. 

Probably a small variety of H. prevostii (p.565). L. $ 5 mm. 

North-Atlantie (Azores). E 

H. stewarti (Filh.) 1885 Allorchestes s., Filhol in: Bull. Soc. philom., ser.7 0.9 
p.54 | 1885 A. s., Filhol in: Recu. Passage Vönus, v. 311 Zool. p. 465 t.53 f.5. 

L. $ 17 mm. 

Paterson Inlet (Stewart Island by New Zealand). 

H. stolzmani Wrzesn. 1879 H.s., Wrzeäniowski in: Zool. Anz., ©.2 p.201 | 
1893 H.pontica (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 529. 

L. 2 7, 8 9 mm. 

Bay of Chimbote [Peru]. Under stones in small tidal pools. 

H. tenella (A. Costa) 1857 Amphithoe t., A. Costa in: Mem. Ace. Napoli, v.1 
p- 204 t.2 f.8 | 1893 Hyale pontica (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 526. 

L. 5 mm. 

Bay of Naples. 

H. villosa S.I. Sm. 1876 H.v., (S. I. Smith in:) Kidder in: Bull. U.S. Mus., 
v.3 p.58. 


Closely allied to H. hirtipalma (p. 564), but gnathopod 1 with 6th joint not 
widening to the palm. L. nearly 10 mm. 


Southern Indian Ocean (Kerguelen Island). Rocky beaches. 


H. sp., (Hasw.) 1879 Allorchestes longicornis (non Orchestia l. Kreyer 1845!), 
Haswell in: P. Linn. Soc. N. S. Wales, v.4 p.251 t.7 f.4 | 1885 A.l,, Haswell in: 
P. Linn. Soc. N. S. Wales, v.10 p. 95 t.10 £.6—8 | 1893, A. Della Valle in: F. Fl. Neapel, 
v.20 p. 528. 

Closely agreeing with H. camptonyx (p. 570). L. about 10 mm. 


South-Paeifie (Kiama [New South Wales]). Between tide-marks. 


12. Gen. Hyalella S. I. Sm. 


1874 Hyalella (Sp. un.: H. dentata), S. I. Smith in: Rep. U. S. Fish Comm., v.2 
p. 645 | 1888 H., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 172, 433 | 1893 H., A. 
Della Valle in: F. Fi. Neapel, v.20 p.512 | ?1877 Lockingtonia (Sp. un.: L. flwvialis), 
Harford in: P. Calif. Ac., v.7 p. 58. 


Like Hyale (p. 559), except that maxilla 1 has a smaller palp, not 
reaching base of apical spines of outer plate, gnathopod 2 in 9 (Fig. 97 
p. 580) has the 5t& joint produced behind between the 4! and 6tk, and 
the telson (Fig. 98 p. 580) is entire. 

Fresh water; in depths of lakes down to 120 m, and at heights above sea-level 
extending to 4058 m. 

15 species. 


Synopsis of the species: 


1 With dorsal teeth — 2. 
Without dorsal teeth — 7. 


Hyalella 575 


Dorsal teeth only on the pleon . ....... 1, H.azteca. . . . p.575 
Dorsal teeth on both peraeon and pleon — 3. 

Side-plates 1—4 apically aeute — 4. 

Side-plates 1—4 not apically acute — 5. 

Peraeon segments with lateral teeth .. . . . - 2. H. echinus. . . p.576 
Peraeon segments without lateral teeth . . . . - 3. H.longipes . . p.576- 


= 
| Dorsal teeth large, present on all peraeon segments 4. H. lueifugax . . p. 576, 


4 


5 2 Dorsal teeth small, not present on peraeon seg- 


ments 1—4 — 6. 
Gnathopod 2 in S, 6th joint broader than long, 

palm defined by a tooth . ». » »-» 2... 5. H. latimana . . p.577 
Gnathopod 2 in 3, 6th joint longer than broad, 

ee ee Res 6. H. longipalma . p.577 
Side-plates 1—4 produced into spine-like processes 7. H. armata . . . p.577 
Side-plates 1—4 not produced into spine-like pro- 

cesses — 8, 
Without aceessory branchiae (so far as known) — 9. 
With accessory branchiae — 11. 
9 Uropod 3 nearly reaching end of uropod 2. . . 8. H.longistila . . p.577 
Uropod 3 not nearly reaching end of uropod 2 — 10. 


6 


7 


10 J Stout, with eoppery lustre. . .. 2.2.2... 9. H.cuprea . . . p.578 

\ Not stout, without eoppery lustre . . .».... 10. H.inermis . . . p.578 
Gnathopod 2 in d, finger elosing strongly on inner 

1 BE Re ne 11. H.jelskii. . . . 'p.578 
Gnathopod 2 in d, finger with apex only on inner 
surface of 6th joint — 12. 


18 Peraeopod 1 shorter than peraeopod 2 — 13. - 
- Peraeopod 1 not shorter than peraeopod 2 — 14, 

13 Maxilla 1, palp eomparatively long. . ....» - 12. H. dybowskii . p.579 
Maxilla 1, palp very short... .. » 22.2.» 13. H. lubomirskii . p.579 
Gnathopod 2 in d, hind margin of 6th joint apically 

14 bulging, in 2 6th joint not apically widened . 14. H. meinerti . . p.579 
Gnathopod 2 in d, hind margin of 6th joint not 

apically bulging, in @ 6th joint apically widened 15. H. warmingi . . p.580 


1. H. azteca (Sauss.) ?1818 Ampithoe dentata, Say in: J. Ac. Philad,, vo. 1uı 
p- 383 | 1874 Hyalella d., S.I. Smith in: Rep. U. S. Fish Comm., v.2 p. 645 t.2 f.8—i0 | 
1876 Allorchestes dentatus, Faxon in: Bull. Mus. Harvard, v.3 p.373 | 1858 Amphitoe 
aztecus, Saussure in: M&m. Soc. Geneve, v. 14 p.474 t.5 f.33 | 1888 Hiyalella azteca, 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.311 | 1862 ? Allorchestes knickerbockeri + 
Amphitho& a., Bate, Cat. Amphip. Brit. Mus., p.86 t.6 f.1; p.250 | ?1877 Lockingtonia 
flwvialis, Harford in: P. Calif. Ae., v.7 p.54. 7 


Body slightly compressed, pleon segments 1 and 2 each produced in- 
to a dorsal tooth, usually well marked, but apparently sometimes obsolescent. 
Side-plates 1—4 almost rectangular. Pleon segment 3, postero-lateral eorners 
subquadrate. Eyes nearly round. Antenna 1, flagellum rather longer than 
peduncle, 7—9-jointed. Antenna 2 a little longer, ultimate and penultimate 
joints of pedunele long, subequal, flagellum little longer than peduncle, 
8—12-jointed. Gmnathopod 1 small and slender, palm transverse, nearly 
straight, defined by a small tooth, behind which apex of finger eloses. Gnatho- 
pod 2 in JS, 6% joint very stout, a little longer than broad, palm oblique, 
slightly convex, with abrupt noteh near middle and 2 slight emarginations near 
defining angle; finger stout, curved. Gmathopod 2in Q weakand slender, 5tk and 
6 joints long, narrow, 6tk more than twice as long as broad, hind margin 


576 Hyalella 


produced a little beyond front, though not enough to form a proper chela 
between the small palm and small finger. Peraeopods 3—5, 24 joint broad, 
serrate, but smooth in Saussure’s figure. Peraeopod 5 little longer than 
peraeopod 4. Uropod 3, ramus nearly as long as peduncle, slender, tapering, 
with setae at apex. Telson stout, ‚as long as broad; apical margin rounded, 
with slender seta on each side. L. about 4—6 mm. 


Mexieo; North America (Florida, Conneetieut ete.). Streams, lakes, stagnant water. 


2. H. echinus (Faxon) 1876 Allorchestes e., Faxon in: Bull. Mus. Harvard, v.3 
p. 867 £.19—21 | 1888 Hyalella e., T. Stebbing in: Rep. Voy. Challenger, v.29 p.455 | 
1893 H. e., A. Della Valle in: F. Fl. Neapel, v.20 p.517 t.58 f. 12, 13. 


Body short, very stout, peraeon segments 1—7 and pleon segments 1—4 
each having on hind margin 2 medio-dorsally elevated spine-like processes, 
and peraeon segments 1—7 with pleon segment 1 each having a small 
marginal process on either side. Head with small deflexed rostral point, 
a tuberele on each cheek. Side-plates 1—4 large, triangular, with ridge 
from centre of base to apex. Side-plate 4 with tuberele on hind margin, 
side-plate 5 with tuberele on each lobe. Eyes round, large, protuberant. 
Antenna 1, flagellum 6—8-jointed. Antenna 2, flagellum 9-jointed. Gnatho- 
pod 2 in d, 6®h joint large, somewhat widened to the rather oblique, slightly 
concave palm, which receives point of finger in a terminal notch. Gnatho- 
pod 2 in Q, 5tk and 6th joints subequal. Peraeopods 3—5, 24 joint moderately 
expanded; peraeopod 3 only °/, as long as the elongate, subequal 4! and 
5th peraeopods. L. 5—7 mm. 


Lake Titicaca. Depth 18—110 m. 


3. H. longipes (Faxon) 1876 Allorchestes l., Faxon in: Bull. Mus. Harvard, 


v.3 P.368 f.22—25 | 1888 Hyalella l., T. Stebbing in: Rep. Voy. Challenger, v,29 p.455 | 
1893 H.1., A. Della Valle in: F. Fl. Neapel, v.20 p. 515 t.58 £. 6,7. 


Peraeon segment 1 with front margin forming a short medio-dorsal 
tooth; peraeon segments 1—7 and pleon segments 1—3 each with hind margin 
produced to a backward-pointing, medio-dorsal tooth or spine-like process, 
small on peraeon segments 1—4 (the first 2 teeth sometimes longer, curved 
forward), large on the others, largest on pleon segments 1 and 2; pleon seg- 
ment 4 with hind margin forming a median projection either subacute or 
convex. Side-plates 1—4 long, apically pointed. Pleon segments 1—3, 
postero-lateral corners slightly produced. Eyes round, protuberant. Antenna 1, 
flagellum 13-jointed. Antenna 2 somewhat longer, flagellum 14-jointed. 
Gmathopod 2 in S, 6t% joint not very large, widening to palm, which is not 
very oblique, defined by a small projecting tooth. Peraeopods 4 and 5 very 
long. Uropod 3 very short, with a very slender seta at tip. L. about 10 mm. 


Lake Titicaca. Depth 20—72 m. 


4. H. lucifugax (Faxon) 1876 Allorchestes I, Faxon in: Bull. Mus. Harvard, 
v.3 p.369 f.26 | 1888 Hyalella l., T. Stebbing in: Rep. Voy. Challenger, v.29 p.455 | 
1893 H.1!., A. Della Valle in: F. Fl. Neapel, ©.20 p.515 t.58 f.4,5. 


Q unknown. — C. Very like H.longipes, with the same number of dorsal 
processes, but 1° dorsal tooth overlies the head, the next 6 are also large, 
curved forward. Side-plates 1—4 with rounded apices. Antennae 1 and 2 
subequal. L. 11 mm. 


Lake Titicaca. Depth 72—110 m. 


ee 


a cn a tl? „I m ke 


Hyalella 577 


5. H. latimana (Faxon) 1876 Allorchestes latimanus, Faxon in: Bull. Mus. 
Harvard, v.3 p.370 f.27, 28 | 1888 Hyalella I., T. Stebbing in: Rep. Voy. Challenger, 
0.29 p.455 | 1893 H. latimana, , A. Della Valle in: F. Fl. Neapel, «.20 p.515 t.58 £. 8.. 


Body thick, peraeon segments 6 and 7 and pleon segments 1—3 each 
produced to a small medio-dorsal spiniform tooth. Side-plates 1—4 quadrate, 
their lower angles rounded, side-plate 4 emarginate behind. Pleon seg- 
ments 1—3, postero-lateral corners prolonged backward. Eyes nearly round. 
Antenna 1 ?/, as long as antenna 2, pedunele reaching middle of ultimate 
joint of peduncle of antenna 2. Antenna 2 half as long as body, number 
of joints in flagellum not recorded. Gnathopod 2 in J, 6! joint large, 
broader than long, widening much to the palm, which is moderately oblique, 
straight, defined by a prominent tooth. Gnathopod 2 in O0 much smaller. 
Peraeopod 5 of moderate length. Uropod 3 reaching a little beyond telson. 
Telson broad. L. 7—12 mm. 


Lake Titicaca. Depth 18—36 m. 


6. H. longipalma (Faxon) 1876 Allorchestes longipalmus, Faxon in: Bull. Mus. 
Harvard, v.3 p.871 f.29—31 | 1888 Hyalella l., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p. 455 | 1893 H. longipalma, A. Della Valle in: F. Fl. Neapel, v.20 p. 516 t. 58 f.9. 


Very near to H.latimana, but peraeon segment 5 in addition having 
a dorsal tooth. Eyes round, antennae 1 and 2 each with flagellum of 15 joints. 
Gnathopod 2 in J, 6th joint large and swollen, palm sinuous and very long, 
setose, so oblique as to leave a very short hind margin, from which it is 
defined chiefly by impact of finger. Telson with seta on each side of hind 
margin. L. 9—13 mm. 


Lake Titieaca. 


7. H.armata (Faxon) 1876 Allorchestes armatus, Faxon in: Bull. Mus..Harvard, 
v.3 p.364 f.1-—18 | 1888 Hyalella armata, T. Stebbing in: Rep. Voy. Challenger, v.29 
p.455 | 1893 H. a, A. Della Valle in: F. Fl. Neapel, v.20 p.514 t.58 £.2,3. 


Body stout, hind margin of segments raised in conspieuous transverse 
ridge. Side-plates 1—4 produced into spine-like processes (longer in specimens 
from greater depth), 1°:—34 direeted downward and forward, 4! about twice 
as long as 34, at right angles to length and height of body. Eyes round. 
Antenna 1, pedunele reaching middle of ultimate joint of peduncle of antenna 2, 
flagellum 12-jointed. Antenna 2 much longer than antenna 1, gland-cone 
prominent, flagellum 13-jointed. Maxilla 1, palp (in figure) reaching more than 
half the distance from its base to apex ofouter plate. Gnathopod 1, 5'"jointas broad 
(in figure broader than and as long) as 6", palm transverse, slightly concave, 
finger curved. Gnathopod 2 in C very large, 6tk joint widening much to the 
palm, which is oblique, straight, with small setae, finger slender, curved. 
Gnathopod 2 in Q smaller, 5! and 6% joints subequal, palm nearly trans- 
verse. Peraeöopods 3 and 4 apparently with narrow 24 joint. Peraeopods 4 
and 5 elongate. Branchial vesiecles simple. Marsupial plates long and rather 
broad, fringed with short setae, apex pointed. Uropod 3 very small, curved 
upward, projecting little beyond the broad telson. Integument with rows of 
microscopie hairs. L. 7—10 mm. 


Lake Titieaca. Depth 20—120 m. 


8. H.longistila (Faxon) 1876 Allorchestes longistilus, Faxon in: Bull. Mus. 
Harvard, v.3 p.375 £.37 | 1893 Hyalella dentata var.?, A. Della Valle in: F. Fl. Neapel, 
v.20 p. 517. 


Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda T. 37 


578 Hyalella 


Body smooth, long, slender. Side-plates 1—4 quadrate. Pleon segments 
1—3, postero-lateral corners acute. Eyes nearly round, dark, approximating 
above. Antenna 1 nearly as long as antenna 2, flagellum 13-jointed, both 
antennae shorter in Q than in d. Gnathopod 2 in J, 6* joint large, widening 
to the oblique, rather convex palm, which is defined by a projection; 6! joint 
in © long and narrow. Peraeopods 3—5 said to be subequal, but in figure 
showing the usual successive elongation. Uropod 3 very long, extending far 
beyond the tip of the telson, almost to the end of uropod 2. Telson with 
2 long setae on hind margin. L. 3—6 mm. 


Brazil (near Campos). 


9. H. cuprea (Faxon) 1876 Allorchestes cupreus, Faxon in: Bull. Mus. Harvard, 
v.8 p. 372 f. 32—84 | 1895 Hiyalella cuprea, A. Della Valle in: F. Fl. Neapel, v.20 
p.514 1.58 £.1. 


Body stout, smooth. Side-plates I—4 rather deep. Pleon segment 3, 
postero-lateral corners quadrate. Antenna 1, flagellum about 10-jointed. 
Antenna 2 considerably longer, about '/, as long as body. Gnathopod 2 
in d, 6tk joint swollen, palm convex (or, in figure, sinuous), setiferous, 
oblique, defined by a prominence, finger strong, eurved. Gnathopod 2 in Q, 
6th joint long and narrow. Peraeopods 3—5, 24 joint large, hind margin 
slightly serrate. Peraeopod 3 much shorter than peraeopods 4 or 5. Colour 
in many parts a coppery lustre L. 9—11 mm. 


Lake Titicaca. 


10. H. inermis S.I. Sm. ?1860 Amphithoe andina, A. Philippi, Reise Atacama, 
p.170 | 1888 Hyalella a., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 326 | 1874 H. 
inermis, S.I.Smith in: Rep. U. S. geol. Surv. Terr. 1873, p.609 t.1f.1,2 | 1891 H.i., T. 
Stebbing in: E. Whymper, Trav. Great Andes, p.361 f.; suppl. p.125 | 1876 Allorchestes 
dentatus dar. inermis + A.d. var. gracilicornis, Faxon in: Bull. Mus. Harvard, v.3 p. 373 
f.; p.374 | 1893 Hyalella dentata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 516. 


Body entirely devoid of dorsal teeth. Appendages as in H. azteca (p. 575), 
except: Antenna 1 in S reaching middle of flagellum of antenna 2; 34 
joint of peduncle fully as long as 24; flagellum longer than peduncle, 
8—10-jointed. Antenna 2, flagellum much longer than peduncle, 12-jointed 
(in var. gracilicornis Q antenna 2 half as-'long as body, twice as long as 
antenna 1; flagellum 13-jointed). Gnathopod 1, 5tk and 6th joints stout, 
6% widening to palm, which is defined by a blunt tooth, 6% joint bent 
down on broad apex of 5tk; gnathopod 2 has the palm nearly straight, 
without any abrupt notch near the middle; finger slightly curved, terminating 
in an acute horny tip. L. 4—6 mm. 


Colorado; Ecuador; Peru; Argentina; Chili. In pools, lakes (Titicaca), canals ete., | 


also in saline water; to a height of 4053 m. 


11. H. jelskii (Wrzesn.) 1879 Hyale (Allorchestes) j., Wrzesniowski in: Zool. 
Anz., v.2 p.176, 490 | 1888 H.j., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1705 | 
1893 Hyalella j., A. Della Valle in: F. Fl, Neapel, v.20 p. 514. 


Head longer than 1° peraeon segment. Eyes small, circular. Antenna 1 
more than half as long as antenna 2, flagellum twice as long as peduncle, 
with 11 joints ind and 9 ino. Antenna 2 ind ?/, as long as body, 
flagellum twice as long as peduncle, with 18 joints; in Q more than "/, as 
long as body, flagellum twice as long as peduncle, 14-jointed. Maxilla 1, 
palp less than !/, distance between its base and apex of inner plate. 


Hyalella 579 


Gnathopod 1 as in H. dybowskii, except that 6% joint is only °/, as long 
as 5th, Gnathopod 2 in C, 5tk joint '/, as long as 6tk, palm rather oblique, 
spinose, finger with '/, of its length on inner surface of hand when closed. 
Gnathopod 2 in Q, 6f% joint 2"/, times as long as broad. Peraeopods 1 
and 2 subequal. Peraeopod 4 slightly longer than peraeopod 5. Accessory 
branchiae on gnathopod 2 and peraeopods 1—3 successively longer, on 
peraeopod 4 longest and double, on peraeopod 5 wanting. L. © 4, 0 5 mm. 


East slope of Cordilleras (Pumamarca). Height 2511 m. 


12. H. dybowskii (Wrzesn.) 1879 Hyale (Allorchestes) d., Wrzesniowski in: 
Zool. Anz., v.2 p.199 | 1888 H.d., T.Stebbing in: Rep. Voy. Challenger, v.29 p. 1705 | 
1893 Hyalella d., A. Della Valle in: F. Fl. Neapel, v.20 p. 514. 


Head as long as peraeon segment 1. Eyes oval, widened below. 
Antenna 1 little more than half as long as antenna 2, peduncle ?/, as long as 
flagellum, which has in G 13, in 9 10 joints, most of them with a couple 
of sensory filaments. Antenna 2 half as long as body, peduncle ?/, as long 
as flagellum, which has in 9 15, in © 14 joints. Maxilla 1, palp about ?/, 
as long as distance between its base and the apex of outer plate. Gmatho- 
pod 1, 5th joint as long as 6th, 6th narrow at base, front margin convex, 
hind concave, palm transverse, with 2 not very prominent rounded lobes, 
finger shorter than palm. Gnathopod 2 in C, 5tk joint as long as 4b, half 
as long as 6b, 6th triangular, palm °/, as long as the joint, rather oblique, forming 
a single curved lobe, finger passing its apex only between 2 palmar spines 
on to surface of joint. Gnathopod 2 in Q like gnathopod 1, but more slender, 
6! joint small, not twice as long as broad. Peraeopod 1 considerably shorter 
than peraeopod 2. Peraeopods 4 and 5 equal. Simple tubular accessory 
branchiae on peraeopods 1—5. 


West slope of the Cordilleras (Pancal, Montana de Nancho). Height 2196 m. 


13. H. lubomirskii (Wrzesn.) 1879 Hwyale (Allorchestes) I, Wrzesniowski in: 
Zool. Anz., v.2 p.177 | 1888 H.1., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1705 | 
1893 Hyalella l., A. Della Valle in: F. Fl. Neapel, v.20 p. 514. 


Head as long as peraeon segment 1. Eyes rather large, irregularly 
oval. Antenna 1 half as long as antenna 2, flagellum not twice as long as 
peduncle, 10-jointed. Antenna 2 little over half as long as body, flagellum 
more than twice as long as peduncle, 18-jointed. Maxilla 1, palp less than !/, 
distance between its base and apex of inner plate. Gmathopod 1 as in 
A. jelskii, but 6% joint almost as long as 5". Gnathopod 2 in J, 5tk joint 
less than '/, as long as 6t", palm rather oblique, spinose, forming 2 lobes, 
finger with apex only on inner surface of hand. Gnathopod 2 in O, 6f* joint 
not quite twice as long as broad. Peraeopod 1 a littie shorter than peraeo- 
pod 2. Peraeopod 4 longer than peraeopod 5. Accessory branchiae simple, 
quite rudimentary on gnathopod 2, very small on peraeopods 1 and 2, longer 
than the principal branchiae on peraeopods 3—5. L. 5—6 mm. 


West slope of Cordilleras (Pacasmayo). Height 2511 m. 


14. H. meinerti Stebb. 1899 H.m., T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 v.7 p.407 t. 32». 


Side-plates I—3 deeper than broad. Pleon segment 3, postero-lateral 
corners acutely quadrate. Eyes black, usually wider apart than the diameter. 
Antenna 1 slender, more than half as long as antenna 2, 34 joint nearly as 
long as 24, but much resembling joints of flagellum, flagellum with 9 or 10 

87* 


ni 
Be 


580 i Hyalella 


elongate joints. Antenna 2 slender, more than half as long as body, ultimate 
joint of peduncle long, flagellum with 13—15 elongate joints. Gnathopod 1 


in C as in H. inermis (p. 578) but less robust, the 6! joint searcely widening 


to the transverse palm. Gmathopod 2 in C (Fig. 97), 24 joint narrow, 4th 


with rounded apex, 5!" with the usual eup-forming frimged lobe, 6" much 


longer than broad, basal part narrow, rather abruptly widening at the boss 


which definesthe oblique, slightlysinuous 


palm. Gnathopods 1 and 2 in 9 small, 
4th joint with rounded apex, 6" in gnatho- 


ON /-2e-- aM joint  pod 1 shorter than 5t, but in gnatho- 
Dans pod 2 about as long, in both narrow, 
WEIN - Telscn oblong, narrowest at base, the’ short 


palm transverse or slightly tending to 

-- Uropod.3 form an acuteangle with the hind margin. 

Peraeopods 3—5 suecessively a little 

Fig. 97. Fig. 98. longer, 24 joint oval in peraeopods 3 

Gnathopod 2, d. TUropod 3 and telson. and 4, much wider in peraeopod 5. 
Fig. 97 &98. H. meinerti. 2 

Eggs and marsupial plates large. Acces- 

sory branchiae on peraeopods 1—5, ordinary branchiae not perceived on 

peraeopod 5. Uropods 1—3 unusually slender; uropods 1 and 2 with lateral 

spines on both rami. Uropod 3 (Fig. 98) eomparatively long, the tapering 

ramus rather longer than pedunele, extending considerably beyond the telson. 

Telson (Fig. 98) oblong oval, with pair of spinules on rounded apex. L. 5—-6 mm. 

Brazil (Laguna di Espino). 

15. H. warmingi Stebb. 1899 H. w., T. Stebbing in: Tr. Linn. Soe. London, 
ser.2 v.7 p.406 t.32A. 

Body rather robust. Side-plate 6 deeply lobed behind. Pleon seg- 
ment 3, postero-lateral corners a little produced backward, acute. Eyes small, 
dark, rounded, more than the diameter apart. Antenna 1, 24 joint little shorter 
than 1%, 34 a little shorter than 24, flagellum with 13 joints in 9, 10 in Oo. 
Antenna 2 more than half as long as body, gland-cone promment, ultimate 
joint of pedunele longer than penmultimate, flagellum with 19 joints in C, 


15 ing. Maxilla 1, palp minute. Maxillipeds, 4% joint of palp with curved 


spine on the blunt end. Gmathopod 1 in CS, 5tk joint with bulging hind 
margin fringed, 6'k shorter, widening with sinuous hind margin to the trans- 


verse palm, which is defined by a process within which the finger eloses, 


an oblique row of spinules on surface. Gmathopod 2 in 9, 24 joint not 
lobed below, 5th short, the fringed cup-forming process rather long, 6 joint 
large, oval, palm very oblique, sinuous, forming 3 lobes, of which the centre 
one is broadest, the finger elosing at the 34 into a pocket, which meets’ the 
hind margin at a well defined angle. Gnathopods 1 and 2 in © similar to 
gnathopod lin. Ö, but smaller, and 6%» joint in gnathopod 2 in Q rather 
longer and more slender than in gnathopod 1. Peraeopods 1—5 tolerably 
robust and spinose. Peraeopod 1 not shorter than peraeopod 2. Peraeo- 
pods 3—5, 24 joint broadly oval, subequal in peraeopods 3 and 4, considerably 
larger in peraeopod 5. Simple accessory branchiae on peraeopods 1—4 not 
so long as prineipal branchiae. Uropods 1 and 2 with lateral spines on both 
rami. Uropod 3, ramus as long as peduncle. Telson squared at base, then 
broadly rounded with 2 distant setules on broad apical margin. Colour 
dusky in spirit. L. 5—6 nm. 


Brazil (Lagoa Santa, watercourse near Rio de Janeiro). Height 1200 m. 


Gang 


2: ua 


TEE DT 
L am 


rn tete 7 en az 


NET 


Allorchestes 581 


13. Gen. Allorchestes Dana 


1849 Allorchestes (part.), J. D. Dana in. Amer. J. Sci., ser.2 ».8 p.136 | 1852 A, 
(part.), J. D. Dana in: P. Amer. Ac., v.2 p.205 | 1888 A. (part.), T. Stebbing in: Rep, 
Voy. Challenger, v.29 p. 1686 | 1880 Aspidophoreia (Sp. un.: A. diemenensis), Haswell 
in: P. Linn. Soe. N. S. Wales, v.5 p.101. 


Distinguished from Hyale (p. 559) by gnathopod 2 in JS (Fig. 99 
p. 583), which has the 5t" joint produced behind between the 4!" and 6% joints, 
and from Hyalella (p. 574) by having the telson (Fig. 100 p. 583) more or 
less divided; sometimes the palp of ER 1 BgrpeB with that of Hyale, 
sometimes with that of Hyalella. 

5 accepted and 13 doubtful species. 


Synopsis of accepted species: 


plate — 2. 


N Maxilla 1. palp not reaching apex of outer 
1 
| Maxillal, palp reaching apex of outer plate — 4. 


9 Gnathopod 1 ind, finger much longer than palm 1. A. novizealandiae. . p.581 
Gnathopod 1 in 5, finger matching palm — 3. 


er f Telson divided to the base... ...... 2. A. compressus . . . p.581 
\ Telson not divided beyond the middle . . . 3. A. malleolus . . . . p.582 

A f Apices of telson acute. .. .. . 2.2... 4. A. plumicornis . . . p.583 
t Apices of telson truncate . ........ Du De BI 5 2 5 oo p- 584 


1. A. novizealandiae Dana 1852 A.n.-z. (2) + A. intrepida ($), J. D. Dana 
in: P. Amer. Ac., 0.2 p.207 | 1853 & 55 A.n., J. D. Dana in: U. S. expl. Exp., v.13u 
p-894; t.61 f. 1a—f (S), g&—v (2) | 1862 A. novae-zealandiae, Bate, Cat. Amphip. Brit. 
Mus., p.37 t.6 f.3 | 1886 A. neo-zelanica, G.M. Thomson & Chilton in: Tr. N. Zealand 
Inst., v.18 p.144 | 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 519. 


Side-plate 4 very large. Antenna 1, flagellum more than twice as 
long as peduncle, 16-jointed. Antenna 2 in O little longer than antenna 1, 
more considerably longer in 9, in J scarcely '/, as long as body, flagellum 
longer than peduncle, with 14 very slender joints. Maxillipeds, 34 joint of 
palp broad. Gmnathopod 1 in C quite small, 5! joint fully as long as 6th, 
distally much broader, with narrow, subacute prolongation of hind margin, 
6th oblong, slightly wider at base, palm transverse, excavate, defined by an 
acute tooth, finger more than twice as long as palm. Gnathopod 2 in GC, 
5th joint narrowly produced between 4th and 6!h, 6th large, ovate, palm nearly 
straight, oblique, longer than hind margin, spinulose, finger long, yet not 
reaching rounded end of palm. Gnathopod 1 in Q, 5 joint distaily wide, 
but without acute process, 6" widening a little to truncate palm, finger not 
longer than palm. Gmathopod 2 in Q, 4b joint somewhat produced, 5" 
strongly produced along hind margin of 6'%, process with a rounded apex, 
6th as in gnathopod 1 but rather larger. Peraeopods 3—5 successively longer, 
setae minute, 4* joint expanded, especially in peraeopod 3. Uropod 1, one 
of the rami (in figure) with only apical spines. L. 10 mm. | 


Pacific (New Zealand, in holes in wood bored by Teredos; Valparaiso ?). 


2. A. compressus Dana 1852 A. compressa + A. australis, J. D. Dana in: 
P. Amer. Ac., v.2 p. 205, 206 | 1853 & 55 A. a. + A. gaimardü?, J. D. Dana in: U. S. 
expl. Exp., v. 1311 p. 892 t.60 f.7a—o; p. 884 t.60 f.l1a—i | 1862 A.a. + A. g., Bate, 
Cat. Amphip. Brit. Mus., p.45 t.7 £.6; p.41 t.6 f.9 | 1880 Aspidophoreia diemenensis, 
Haswell in: P. Linn. Soe. N. S. Wales, ©.5 p.101 t.6 f.2 | 1893 Hyale prevostüi (part.) 
+ H. pontica (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 519, 523, 528, 530. 


582 Allorchestes 


Body compressed, especially at pleon. Side-plates 1—4 deep, 4 also 
wide, 5th shallow, 24—4th quadrate. Pleon segment 3, postero-lateral corners 
quadrate, with minutely produced point. Eyes oval, wider apart than the longer 
diameter. Antennael and 2 ofrather variable proportions(in young from mother’s 
pouch subequal). Antenna 1 usually rather longer than peduncle of antenna 2, 
flagellum 10— 20-jointed. Antenna 2, flagellum shorter or not much longer than 
peduncle, 10—20-jointed, upper lip broader than deep. Maxilla 1, palp 
minute, Maxillipeds, 2% and 34 joints of palp broad. Gmathopod 1 in J, 
5th joint slightly longer than 6, widest subapically, with spinules at the 
projecetion of front and hind margins, 6% joint oblong, a little widened at 
almost transverse convex palm, front margin convex, hind rather sinuous, 
finger fitting palm. Gmathopod 2 in C robust, 24 joint with small downward 
produced lobe, 34 also with front margin lobed, 4b apieally produced behind, 
5th produced backward in a rather slender and not strongly spined lappet, 
6!h large, the palm spinulose, very oblique, defined from the slightly bulging 
hind margin by palmar spines and the small hollow which receives the apex 
of the strong finger. Gmnathopod 1 in O as in J, except that 6tk joint is 
more elongate, as long as 5. Gmathopod 2 in Q rather larger than 
gnathopod 1, 24 joint not produced downward, 34 without conspiceuous lobe, 
4th produced as in JS, 5tk with lappet stretehing along part of straight hind 
margin of 6t", 6! hroader than in gnathopod 1, slightly widening to the 
transverse palm, finger matching palm. Branchial vesicles large, oval, with 
narrow neck. Marsupial plates broad, oblong, produced at one corner, setae 
short. Peraeopods 1 and 2 subequal, slender. Peraeopod 3, 24 joint oblong 
oval, front margin with spines, nearly straight, hind margin nearly smooth, 
4th joint widened, spinose on both margins. Peraeopod 4 considerably longer, 
24 and 4tk joints not quite so wide; branchial vesicles in peraeopods 3 and 4 
with accessory lobe. Peraeopod 5 shorter than peraeopod 4, especially in J, 
but 24 joint much larger and more rounded behind. widest subapically and 
broadly produced behind 34 joint, 4{k not much widened, finger as in all 
the peraeopods short, curved. Uropod 1, rami deeidedly shorter than peduncle. 
Uropod 2, rami a little shorter than peduncle. Uropod 3, ramus small, 
conical, shorter than stout pedunele, tipped with a minute spinule. Telson 
broad, the 2 quadrate lobes, separated by a linear fissure, set at an angle 
to one another, gable-like. Surface ornamented with coloured spots and 
white‘ dots (Haswell). L. 11—20 mm. 

Southern Indian Ocean and South-Paeifie (south- and west-coasts of Australia, 
Tasmania). . 

3. A. malleolus Stebb. 1899 A. m.. T. Stebbing in: Tr. Linn. Soc. London, 
ser.2 v.7 p.409 t.33A. 

Body moderately compressed. Side-plates 1—-4 rather deep, with no 
projeeting point of hind margin. Pleon segment 3, postero-lateral corners 
bluntly produced. Eyes not large, rounded, at least their diameter apart, 
dark in spirit. Antenna 1 about °/, as long as antenna 2, joints of peduncle 
successively shorter, flagellum longer than pedunele, 10—12-jeinted. An- 
tenna 2 not more than !/, as long as body, peduncle stout, flagellum shorter 
than pedunele, 10—12-jointed. In young from the marsupium antenna 1 
not shorter than antenna 2, flagellum of each 2- or 3-jointed. Maxilla 1, 
palp minute, on well defined interruption of hind margin of outer plate. 
Maxilla 2, prineipal seta on inner margin of inner plate not very elongate. 
Gnathopod 1 in C, 24 joint widening rapidiy to the middle, 4% not longer 
than 34, 5th Jittle longer than 6tk, widest subapically, with spines on both 


Allorchestes 583 


margins at widest part, 6 widening to a palm-like angle, a part of the 
sinuous hind margin being adapted to rest on hind process of 5th joint, the 
margin then abruptly turning to join the short spinulose palm, which is 
exactly fitted by the stout 2-pointed finger. Gnathopod 2 in SC (Fig. 99), 
24 joint with no conspieuous distal lobe, 4% produced but not acute, 5th 
produced into a shallow cup-forming fringed process, 6tb oval, finger closing 
over an oblique, almost straight palm into the usual pocket, armed with 2 
palmar spines, the hind margin not at all bulging, carrying spinules at 2 
points. Gnathopod 1 in Oo, 62 joint oblong, 

slightly widening to transverse palm, hind margin 

sinuous, finger acute, elosely fitting palm. Gnatho- 

pod 2 in oO, 4 joint subacutely produced, 5 zu joint 
with broad fringed process produced partly along 4% joint -° 
hind margin of 6! joint, which is oblong, hind 6% joint --- "cz 
margin straight, finger acute, scarcely reaching Fig. 9. Fig. 100, 
end of transverse palm. In young from marsupium Gmathopod 2. 3. Telson. 
gnathopods 1 and 2 have a general resemblance EIER OR. N DOSBRSIHR, 
to gnathopod 1 in Q. Marsupial plates of gnathopod 2 and peraeopod 1 have 
one distal corner subacutely produced, in peraeopod 2 they end squarely; in all 
the fringing setae are short.  Peraeopods 1—5 not strongly spined, finger 
eurved. Peraeopods 3—5, 24 joint oblong oval, the front margin nearly 
straight, hind margin produced downward in rounded lobe; in peraeopod 3 
at least as broad and about as long as in the longer peraeopod 4; in 
peraeopod 4 more oblong than oval, widest proximally; in peraeopod 5 
much broader, widest distally,. Peraeopods 3—5 in Q shorter and stouter 
than in S, 4*b joint. widened distally. Pleopods with 2 or 3 simple coupling 
hooks, and on inner margin of 1° joint of inner ramus 4 or 5 spines not 
eleft but at apex a little dilated and hooked. Uropod 3 small, ramus 
shorter than pedunele. Telson (Fig. 100) nearly square, with slightly convex 
sides, median cleft not reaching beyond middle, its sides not divergent. 
L. about 7 mm. 


Yellow Sea, Sea of Japan. In sea-weed. 


4, A. plumicornis (Heller) 1866 Nicea p., Cam. Heller in: Denk. Ak. Wien, 
v.26ı1 p.5 t.1 f.8,9 | 1899 Allorchestes p., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 
v.7 p.412 t.33C | 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.519. 


Body compressed. Eyes an elongate round. Antenna 1 reaching nearly to 
the middle of flagellum of antenna 2, 1% joint longer than 24 or 34, flagellum 
with 18 or 19 successively lengthening joints. Antenna 2, flagellum longer 
than peduncle, with 22 joints, terminal joints of peduncle and first half of 
flagellum beset on underside with long fascicles of setae. Maxilla 1, palp 
reaching base of spines of outer plate. Maxillipeds, penultimate joint of 
palp setose, ultimate long, acute. Gnathopod 1 in JS, 4*k joint with blunt 
produced point, 5!" with broad distal fringed lobe, 6" oblong oval, rather 
longer than 5th, palm oblique, spinulose, finger somewhat thickened, its outer 
margin abruptly curving to an acute apex. Gmnathopod 2 in d much larger, 
4th joint bluntly produced, 5tk very short, but wide, embracing base of 6, 
which is oval, with small group of spinules on hind margin, palm oblique, 
well defined by angle and palmar spines, finger strong, acute, much eurved. 
Peraeopod 5 like peraeopod 4, but rather longer, 6t" joint slender, straight, 
finger acute, little curved, setule of inner margin prominent as in all the 
peraeopods. Uropods 1—3, all the rami with marginal spines. Uropod 3, 


584 Allorchestes 


peduncle rather shorter than telson. Telson divided to the base, the 2 
triangular lobes inclined one to. the other. L. 9—12 mm. 


Mediterranean, Adriatic. 


5. A. humilis Dana 1852 A. h,, J. D. Dana in: P. Amer. Ae., «.2 p.206 | 
1853 & 55 A.h., J. D. Dana in: U. S. expl. Exp., v.13u p.890; t.60 f.6a—e | 1899 
4A.h., T. Stebbing in: Tr. Linn. Soc. London, ser.2 0.7 p.413 t.33D | 1893 Hyale 
prevostii (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 528. 


Eyes a little oblong or round, light-coloured. Antenna 1 a little shorter than 
antenna2, peduncle ?/, as long as pedunele of antenna 2, flagellum with 6—Sjoints, 
which are very distinet, somewhat moniliform (distally widened). Antenna 2 
about '/, as long as body, ultimate and penultimate joints of pedunele subequal,. 
peduncle with 9 or 10 joints, which are neither very long nor distally widened, 
setae all short. Maxilla 1, palp reaching base of spines of outer plate as in 
Hyale (p. 559). Maxillipeds, 39 joint of palp narrow. Gnathopod 1, 5t% joint, 
short, 6! much longer, oblong, widening to the oblique spinulose palm, with 
spinules at points of hind margin. Gnathopod 2 similar, 6!" joint considerably 
larger, though (Dana) not twice as long, palm somewhat more oblique, with 
defining spine, spinules as in gnathopod 1, 5tk joint with small lobe produced 
between 4b and 6%, finger curved and short, shutting elose against the palm. 
Peraeopods 3—5, ga joint nearly orbieular, hind margin slightly cerenulate. 
‚Peraeopods 1—5 moderately stout, finger curved, with inner setules, as usual.. 
Branchial vesicles narrow proximally, then becoming inflated. Uropod 3 very 
short, ramus as long as peduncle, each with apical spines. Telson divided beyond 
the middle, the apices divergent, truncate, tipped with spinules. L. 5—8 mm. 


Pacifie (Port Jackson [East-Australia], shallow pools along shores; Saghalien).. 


A.angustus Dana 1854 A.a., J.D. Dana in: P. Ac. Philad., 0.7 p. 177 | 1857 
A. a., Stimpson in: Boston J. nat. Hist., 0.6 p. 520 | 1893 A. a., Hyale (part.)?. A. Della. 
Valle in: F. Fl. Neapel, 0.20 p. 527. 


Side-plates 1—4 very deep, 5th shallow. L. 9 mm. 
North-Paeifie (California). 


A. brevicornis Dana 1852 A.b., J.D. Dana in: P. Amer. Ac., %.2 p.206 | 
1853 &55 A.b., J. D. Dana in: U..S. expl. Exp., v 1311 p.898; t.60 f.8a—h | 1893. 
Hyale prevostii 2 (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 528. 


Perhaps young 3 of a Hyale (p.559). L. 10 mm. 
South-Paeifie (New Zealand). Along shores of the Bay of Islands. 


A.istrieus (Grube) 1861 Amphithöe (Hyale) istrica, E. Grube, Ausfl. Triest, 
p.135 | 1864 Nicea i., E. Grube in: Arch. Naturg., v.301 p.200 | 1866 X. i., E. Grube 
in: Arch. Naturg., v. 321 p.887 t.9 £.5 | 1868 N.i., Czerniavski in: Syezda Russ. Est.,. 
Syezda 1 Zool. p.114 t.8 f.24,25 | 1893 Hyale prevostii (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 519. 


L. 6—9 mm. 
Adriatic (Trieste), Black ‘Sea. 


A.japonicus Stimps. 1855 A, japoniea, Stimpson in: P. Ac. Philad., v.7 p.883 | 
1893 Hyale pontica (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 528. 


Eyes large, black, very broad oval, closely approaching each other above, 
L. 12 mm. 


North-Paeific (Japan). 


| 
| 
| 
} 
i 
x 
7 y 
: 


Allorchestes, Aoridae 585 


A.littoralis Stimps. 1853 A.l., Stimpson in: Smithson. Contr., 0.6 nr.5 p.49 
t.3 f.36 | 1873 Hyale l., (S. I. Smith in:) A. E. Verrill in: Rep. U. S. Fish Comm., v.1 


.p.556 | 1893 H. prevostü (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.519. 


L. 8—10 mm. - 
North-Atlantic (America from Kae Bay to Grand Manan). Among 
fucus, ete. and in tide-pools. 


A. patagonicus R. O. EEE 1871 A.p., R. ©. Cunningham in: Tr. Linn. 
Soe. London, ©.27 p.498 t.59 f.14 | 1888 Hyalella sp.?, T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.404 | 1893 H. sp.?, A. Della Valle in: F. Fl. Neapel, v.20 p.514. 


No description; perhaps a species of Hyalella (p. 574). 
Strait of Magellan, Sandy Point. In a freshwater stream. 
= * paulensis Heller 1865 A. p., Cam. Heller in: Reise Novara, v.2ı1 Crust. 


p.128 t.11 f.4 | 1888 Hyale sp.?, T. Stebbing in: Rep. Voy. Challenger, v.29 p. 383 | 
1895 H. prevostii A. Della Valle in: F. Fl. Neapel, v.20 p. 529. 


L. 12 mm. 

Southern Indian Ocean? (St. Paul). 

A. penicillatus Stimps. 1855 A. penicillata, Stimpson in: P. Ac. Philad., v7 
p. 883 | 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 288, 519. 

Antenna 2 with fascieles of long setae. L. 6 mm. 

Sea of Japan. 

A. plumulosus Stimps. 1857 A. p., Stimpson in: Boston J. nat. Hist., v.6 
p.519 | 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 519. 

Antenna 2 with fascieles of plumose setae. L. 10 mm. 

San Francisco Bay. Gravelly shores in the littoral zone. 

A.rubricornis Stimps. 1855 A.r., Stimpson in: P. Ac. Philad., v.7 p.383 | 


1879 Hyale (A.) r., Wrzesniowski in: Zool. Anz., v.2 p.200 | 1893 Hyale sp.?, A. Della 
Valle in: F. Fl. Neapel, v.20 p. 529. 


L. 16 mm. 

Sea of Japan. 

A, sayi Bate 1862 A.s., Bate, Cat. Amphip. Brit. Mus., p.89 t.6 £.5 | 189 
Podecerus falcatus (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 453. 

L. 9 mm. 

North- America. 

A.stylifer Grube 1866 A.s., E. Grube in: Arch. Naturg., v.32ı p.386 t.$ 
f.4 | 1898 Hyale prevostü (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 520. 


Gnathopod 2 in d, 5th joint very short, distally produced to a curved stiliform 
process between 4th and 6th. L. 5 mm. 


Adriatie. Under stones on beach. 

A.sp., Heller 1866 Nicea nilsoni (err., non Amphitho£ nilssonii H. Rathke 1843]), 
Cam. Heller in: Denk. Ak. Wien, v.26ı1 p.4. 

L. & 5—6 mm. 

Adriatie. 


33. Fam. Aoridae 
1899 Aoridae, T.. Stebbing in: Ann. nat. Hist., ser.7 v.4 p. 211. 


Head, lateral lobes little produced. Side-plates of very moderate depth, 
4th with hind margin not excavate. Antenna 1 the longer, with 34 joint 


586 Aoridae, Aoroides 


short (except in Paradryope, p. 602), with accessory flagellum (except in 
Aoroides). The mouth-organs appear to agree in having border of upper lip 
round or very faintly emarginate, lower lip with acutely produced mandibular 
processes. Mandible with 34 joint of palp longer than 24. Maxilla 1 with a 
single seta on inner plate, 10 spines on outer, 24 joint of palp elongate; maxilla 2 
with inner plate fringed. Maxillipeds well developed. Gnathopods1 (Fig. 101) 
and 2 not simple, 1% the larger, and its shape usually differing much in Ö 
and Q. Peraeopöds 1 and 2 glandular. Peraeopod 5 the longest. Branchial 
vesicles simple. Uropods 1—3 biramous, 34 not elongate. Telson simple. 


The position of Paradryope (p. 602) in this family cannot, however, be regarded 
as absolutely secure, and Della Valle’s suggestion that Imay have transposed the gnatho- 
pods 1 and 2, if it could be substantiated, would give a welcome relief, by permitting 
the transfer of the genus to the Photidae (p. 603). 


Marine... . 


7 genera, 25 accepted species and 3 doubtful. 


Synopsis of genera: 


1 | Antenna 1 without accessory flagellum -. . . 1. Gen. Aoroides. . . . p.586 
Antenna 1 with accessory flagellum — 2. 
Gnathopod 1 in S (Fig. 101), Ath joint immensely 
DIEBBGEOR N ee ine 2. Ben; Aora 2,7, 2% p- 587 
Gnathopod 1 in 8, 4th joint not immensely 
produced — 3. 
Gnathopod 1 in g, 5th joint produced to a 
1 A Be 3. Gen. Microdeutopus . p. 588 
Gnathopod 1 in g, 5th joint not produced to 
a strong tooth — 4. 
Uropod 8, rami not minute — 5. 
| Uropod 3, rami minute — 6. 
Gnathopod ling, 5th and 6th joints subequal 
Wahn: un N ern 
Gnathopod 1 in S, 5th joint much wider than 6th 


Pleon segment 6 dorsally evanescent 
| Pleon segment 6 not dorsally evanescent 


4 


5 Gen. Lembos . . . . p.594 


. Gen. Lemboides . . . p. 600 


6 . Gen. Dryopoides . . p.601 


op 


1. Gen. Aoroides A. Walker 


1898 Aoroides (Sp. un.: A. columbiae), A. O. Walker in: P. Liverp. biol. Soe., 
v.12 p. 284. 


Oo. Asin Aora and Micoisaioine (p.588), except that antenna 1 is entirely 
devoid of accessory flagellum, and mandibular palp is very slight and very 
sparingly furnished with setae on the 34 joint. 


1 species. 


1. A. columbiae A. Walker 1898 A.c., A. O. Walker in: P. Liverp. biol. Soe., 
v.12 p. 285 t. 16 £.7—10. 


Ö unknown. — 9. Like © of Microdeutopus anomalus (p. 591) except 
for the generic differences, and side-plate 1 rounded below, peraeopods 3—5 
with wider 24 joint, uropod 3 with peduncle as long as the rami, which are equal, 
inner ramus with 1 spine about the middle of the inner margin, outer with 
apical spines only. L. 5 mm. 


Puget Sound. 


Gen. Paradryope . . p.602. 


E 
2 
4 
# 
F 


Aora 587 


2. Gen. Aora Kıroyer 


1845 Aora (Sp. un.: A.typica), Kroyer in: Naturh. Tidsskr., ser.2 e.1l p.328, 
335 | 1888 A., T. Stebbing in: Rep. Voy. Challenger, v.29 p.1072 (synonymy to date) | 
1893 A., A. Della Valle in: F. Fl. Neapel, v.20 p.406 | 1894 A., G.O. Sars, Crust. 
Norway, v,1 p.544 | 1849 Lalaria (Sp. un.: L. longitarsis), H. Nicolet in: Gay, Hist. 
Chile, v.3 p.240 | 1856 Lonchomerus (nom. nud.), Bate in: Rep. Brit. Ass., Meet. 25 
p.58 | 1857 L. (Sp. un.: L. gracilis), Bate in: Ann. nat. Hist., ser.2 v.19 p. 143 | 1857 
Lalasia, Bate in: Ann. nat. Hist., ser.2 v.20 p.525 | 1859 Autonoe (part.), R.M. Bruzelius 
in: Svenska Ak. Handl., n. ser. v.3 nr.1 p.23. 


Body slender. Head, lateral lobes obtuse. Side-plates of medium depth, 


‘in d 1% somewhat produced forward, 24 rather larger than 34, 5th Jess deep 


than 4%, Antenna 1 much the longer, flagellum long, accessory flagellum 
well developed. Lower lip with mandibular processes strongly produced. 
Mandible, both eutting plates dentate, spine-row of 3 or 4 spines, molar strong. 
Maxilla 1, inner plate small, with 1 apical seta, 24 joint of palp with several 
spine-teeth. Maxilla 2, inner plate the smaller, its inner margin fringed. Maxilli- 
peds, inner and outer plates well developed, well armed, finger of palp not 
stout. Gnathopod 1 in C (Fig. 101) elongate, slender, 4" joint produced 
into a very long spine-like process behind the 5", which is a little broader 
and longer than the narrowly oblong 6%, finger much overlapping palm. 
Gnathopod 1 in Q, 4* joint not produced, 5tt much shorter than 6*%, Gnatho- 
pod 2 in d and O, 5 and 6tk joints subequal. Peraeopods 3—5, 24 joint 
not very widely expanded, 4th peraeopod longer than 34, 5th than 4th, Marsupial 
plates large, broad. Uropod 3, rami equal, much longer than peduncle. 


l species. 


1. A.typica Kroyer 1845 A.t., Kroyer in: Naturh. Tidsskr., ser.2 v.1 p. 328 t.3 
f.3a—1 | 1849 Lalaria longitarsis, H. Nicolet in: Gay, Hist. Chile, v.3 p. 243; Crust. t.2 


 £.8, 8a—f | 1857 Lonchomerus gracilis, Bate in: Ann. nat. Hist., ser.2 v.19 p.143 | 1862 


Aora g.+ A. typica, Bate, Cat. Amphip. Brit. Mus., p. 160 1.29 £.7; p.161t.29 f.8 | 1885 A.t., 
Chilton in: Ann. nat. Hist., ser.5 v.16 p.370|1893 A.g.+ A.t., A. DellaVallein: F.Fl.Neapel, 
v.20 p.407 t.2 £.9, t. 12 £.25—39, t.56 f. 37; p. 409 t. 56 £. 38-40 | 1894 A.g., G. O. Sars, 
Crust. Norway, v.1 p. 545 t. 193 | 1859 Autonoe punctata, R. M. Bruzelius in: Svenska Ak. 
Handl., n. ser. v.3 or. 1 p.24t.1f.3a—g | 1879 Microdeutopus maculatus (2), G. M. Thomson 
in: Ann. nat. Hist., ser. 5 v.4 p. 331.16 £.5—8 | 1881 Microdentopus m., G. M. Thomson 
in: Tr. N. Zealand Inst., 0.13 p. 217 t.8f.74—c | 1882 M. m. (3), Chilton in: Tr. N. Zea- 
land Inst., v. 14 p.173t.8 f.3a,b | 1879 Microdeuteropus tenuipes (2) M. mortoni (S), 
Haswell in: P. Linn, Soc. N. S. Wales, v.4 p.339 t.22 f.1,2 | 1882 Microdeutopus t. + 
M. m., Haswell, Cat. Austral. Crust., p. 264 | 1888 Aora 

kergueleni + A.trichobostrychus, T. Stebbing in: Rep. ER ra 

Voy. Challenger, ®%. 29 p. 1073 t. 109, £.A 8, f.D$9; 
p. 1078 t.109£.B 8, f.C 2. - 


Pleon segment 3, ‚postero-lateral corners 
obtusely quadrate. Eyes small, oval, dark. 
Antenna1 ?/, as long as body, 24 joint the longest, 
3—4 times as long as 34, flagellum with 20—30 
joints or more, accessory flagellum 5-jointed. 
Antenna 2 much shorter, ultimate joint ofpeduncle 
rather longer than penultimate or than flagellum, Fe hm 
flagellum 7-jointed. The gnathopod 1 im C 
(Fig. 101) affords the principal generic character, but the 24 joint in adult 9 
(typica) is said to have a triangular process on the front margin, not observed in 
any of the other forms; in A. trichobostrychus the hind margin of the 24 joint 


-4----- 4th joint 


588 Aora, Microdeutopus 


has a dense brush of setae, whereas generally it is smooth; the prolongation of 
the 4th joint, the relative lengths of 5", 6th and finger are very variable, but 
how far the proportions are constant is as yet indeterminate. In A. gracilis 9 
the 24 joint of the 5*k peraeopod is widened near the distal end, while in 
the ©, and perhaps in both sexes of some forms, it is oblong oval without 
such widening. The telson is sometimes longer than broad (A. trichobostrychus), 
nearly as broad as long (A.graecilis, A. kergueleni), usually with the apex obtusely 
angular, but sometimes (A. gracilis Della Valle, not Sars) emarginate. Colour 
whitish or greyish, with speckling. L. 8 mm (A. gracilis). 

North-Atlantie with adjoining seas (Europe), Pacifie (South-America, Australia, 
New Zealand), southern Indian Ocean (Kerguelen Island). 


3. Gen. Mierodeutopus A. Costa 


1853 Mierodeutopus (Sp. un.: M. gryllotalpa). A. Costa in: Rend. Soc. Borbon., 
n.ser. v.2 p.171 | 1876 M., A. Boeck, Skand. Arkt. Amphip., v.2 p.564 | 1888 M., 
T. Stebbing in: Rep. Voy. Challenger, ©.29 p.299, 1711 | 1893 M., A. Della Valle in: 
F. Fl. Neapel, v.20 p.410 | 1894 M., G.O. Sars, Crust. Norway, v.1 p.539 | 1856 Lembos 
(part.), Bate in: Rep. Brit. Ass., Meet. 25 p.58 | 1857 L. (part.), Bate in: Ann. nat. 
Hist., ser.2 v.19 p.142 | 1859 Autonoe (part.), R. M. Bruzelius in: Svenska Ak. Handl., 
n. ser. v.3 nr.1 p.23 | 1862 Stimpsonia (Sp. un.: 8. chelifera) (non C. Girard 1853, 
Nemertini!) + Microdeutopus (part.) (Mierodeuteropus) (Microdentopus Bate), Bate & 
Westwood, Brit. sess. Crust., v.1.p.284, 287 | 1869 Mierodeuteropus (part.), A. M. Norman 
in: Rep: Brit. Ass,, Meet. 38 p.281 | 1874 M., T. Stebbing in: Ann. nat. Hist., ser. 4 
v.14 p.12 | 1893 Stimpsonella, A. Della Valle in: F. Fl. Neapel, 0.20 p.421. 


Body slender. Head with lateral lobes usually obtuse. Side-plate 1 
in Ö often produced forward, 24 or 3Xthe deepest, remainder successively 
shallower. Antenna 1, 24 joint the longest, accessory flagellum distinct. 
General character as in Aora, but gnathopod 1 in S with 4% joint not greatly 
produced, 5tk very bulky, its hind margin produced to a tooth, which with 
help of 6*% joint and finger makes the limb complexly subchelate. 


10 species accepted, 1 doubtful. 


Synopsis of accepted species: 

1 | Gnathopod 2 in g, palm defined by a tooth — 2. 

Gnathopod 2 in 3, palm not defined by a tooth— 8. 

9 Gnathopod 2 in S, 6th joint much shorter than 5th 1. M. chelifer. . . . p.589 
Gnathopod 2 in d, 6th joint not shorter than 5th 2. M: armatus. . . . p.589 *® 
Gnathopod 1 in 3, tooth of 5th joint with aecessory 

3 | tooth or teeth — 4. 

Gnathopod 1 in d, tooth of 5th joint simple — 8. 


Gnathopod 1 in S, 5th joint with more than 1 
accessory tooth — 5. 


4 Gnathopod 1 in ö, 5th joint with only 1 aecessory 
tooth — 6. 
Gnathopod 1 in 3, 5th joint with innermost tooth 
5 tue las. 02 a ee 8. M. gryllotalpa . . p.590 
Gnathopod 1 in S, 5th joint with middle tooth 
1 Me ee a ne: 4. M.stationis . . . p.59%0 
Gnathopod 1 in S, 5th joint with inner tooth the 
6 | me 2 ar RE 5. M.haswelli . . . p.591 
Gnathopod 1 in S, Ö5th joint with outer tooth 
the smaller — 7. 


Be 


a ei 3 
ee Nm % n x 


Microdeutopus 589 


BR, )e, - |__ SBEESEEH SEE Eee 6. M. anomalus. . . p.591 
Gnathopod 1 in 3, 5th joint with Erg tooth 
apart from primeipal . ...... - « »- 7. M. propinquus.. . p. 592 


8 Antenna 1, flagellum shorter than pedunele . . 8. M.megnae. . . . p.592 
Antenna 1, flagellum longer than peduncle — 9. 


Gnathopod 2 in 3 very slender and very setose 9. M. versiculatus . p.593 


Guathopod 1 in d, 5th joint with aceessory tooth 
£ | 


Gnathopod 2 in & not very slender and not very 
a Er ek nen RP HE A TEE 10. M. damnoniensis. p.593 


1. M. chelifer (Bate) 1862 Stimpsonia chelifera, Bate (& Westwood), Brit. sess. 
Crust., v.1 p.285 f. | 1862 S. c., Bate, Cat. Amphip. Brit. Mus., p.162 t.29 £.9 | 1878 
8. c., T. Stebbing in: Ann. nat. Hist., ser.d5 v1 p.34 t.5 f.2,3 | 1888 S.c., Micro- 
deutopus (part.), T. Stebbing in: Rep. Voy. Challenger, v.29 p. 334 | 1893 Stimpsonella c., 
A. Della Valle in: F. Fl. Neapel, v.20 p.424 t.56 f. 42—45. 


Side-plate 1 with an acute front corner in C. Antennae 1 and 2 sub- 
equal (Bate: antenna 1 the shorter). Antenna 1, 24 joint longer than 1, 
34 very short, flagellum longer than peduncle, accessory flagellum 2-jointed. 
Antenna 2, antepenultimate joint of pedunele very thick, penultimate very long, 
at the base winged below so as to equal depth of preceding joint, ultimate about 
as long as penultimate or flagellum. Gmathopod 1 in C very large, the size 
chiefly due t6 the 5" joint, the distal tooth of which varies greatly in length, a 
deep cavity separating it from a little setose tooth adjacent to base of the some- 
what oblong 6t joint; 6% joint gently eonvex in front with undulating hind margin 
and no conspicuous palm. Gnathopod 2 in S, 5t" joint much longer than 6tk, 
6 as broad as long, widening to the variable palm, which is defined by 

a tooth sometimes large but capable of vanishing altogether, finger matching 
ee Gnathopod 1 in O, 6*%* joint slightly larger than 5%, about twice as 
long as broad, palm defined by a palmar spine, overlapped by_serrate finger. 
Gnathopod 2 in © similar to gmathopod 1, but much smaller. Peraeopods 1 
and 2, 4 and 5‘ joints much broader than 6th, Peraeopods 3—5, 24 joint 
narrow; peraeopod 5 much the longest; in all peraeopods the 6tk joint has 
an apical group of setae. Uropod 3, pedunele short, stout, rami equal, little 
longer than peduncle. Telson with a setule at the lateral notch on each 
side of the rounded, unproduced apex. L. S—9 mm. 


English Channel (South-Devon). 


2. M. armatus Chevreux 1886 &87 M.a., Chevreux in: Bull. Soc. zool. France, 
v.11 p.XLI: 0.12 p.312 t.5 £.11, 12; textf.6, 7 p.296 |.1893 Stimpsonella armata, 
A. Della Valle in: F. Fl. Neapel, v.20 p.422 t.4 f.8; t.11 £.13—24. 


Very slender; ventral surface of peraeon segments 2—4 (sometimes 
others?) armed each with a spiniform tooth. Head without rostrum, lateral 
lobes little prominent. Side-plate 1 in J little produced, in © rhombeidal. , 
Eyes small, round, black. Antenna 1 rather shorter than the body, 24 joint 
longer than 1°, 34 over '/, as long as 24, flagellum longer than peduncle, 
11-jointed, accessory flagellum very short, with 2 joints, 24 minute. Antenna 2 
much the shorter, ultimate joint of peduncle as long as penultimate, slightly 
longer than the 4-jointed flagellum. Gnathopod 1 in Q, 24 joint very broad 


‘ except at the extremities, 5t massive, hind margin finely erenulate distally 


and produced to a strong tooth, 6% much shorter and narrower, somewhat 
oblong, with very irregularly crenate hind margin, finger long, slender. Gnatho- 


'pod 2 in J, 24 joint broad, front margin somewhat indentured and distally 


produced, sth almost oblong, 6th rather longer, oblong, palm only slightly oblique, 


590 Microdeutopus 


defined by a small tooth, and sometimes carrying a submedian one, finger 
matching palm. Gnathopod lin Q, 2% joint not expanded, 5tk shorter than 6th, 
6tk oblong but with rather oblique palm defined by a palmar spine and 
overlapped by finger. Gnathopod 2 in © similar to gnathopod 1 but smaller, 
and the finger not overlapping the palm. Peraeopods 1—5 slender, little 
armed; 24 joint in peraeopods 3—5 narrowly oval. Uropods 1 and 2, rami 
slender, with few spines. Uropod 3, rami equal, a little shorter than peduncle. 
Telson nearly as broad as long, tapering to a truncate apex, the lateral pro- 
cesses little marked. Colour yellow, with large blotches of violet-brown on 
peraeon (Chevreux), front part of peraeon wine-red or grey or yellowish, eggs 
emerald green (Della Valle). L. 3—4 mm. 


North- Atlantic (South-East of Brittany); Bay of Naples. Depth 10—20 m. 


ö. M. gryllotalpa A. Costa 1853 M. g., A. Costa in: Rend. Soe, Borbon., 
n.ser. ©.2 p.178 | 1876 M. g., A. Boeck, Skand. Arkt. Amphip., v.2 p.565 t.29 f.6| 
1884 M.g., H. Blane in: N. Acta Ac. Leop., v.47 p.75 t.9 f.82—90 | 1893 M. g., A. 
Della Valle in: F. Fl. Neapel, v.20 p.411 t.1 £.12; t.11 £.25—43 | 1894 M.g., G.0. 
Sars, Crust. Norway, v.1 p.543 t. 192 f.2 | 1859 Autonoe grandimana, R. M. Bruzelius 
in: Svenska Ak. Handl., n. ser. v.3 nr.1 p.26 t.1 £.5 | 1862 Microdeutopus grandimanus, 
Bate, Cat. Amphip. Brit. Mus., p.378 | 1873 M. minax, (8. I. Smith in:) A. E. Verrill 
in: Rep. U.S. Fish Comm., ®.1 p.562 | ?1885 Amphithoe salenskü, J.V.Carus, Prodr. 
F. Medit., v.1 p. 396. 


Body moderately robust. Head without rostrum, lateral lobes blunt, 
scarcely projeeting. Side-plates shallow, 1° moderately produced in d. 
Pleon segment 3, postero-lateral corners bluntly quadrate. Eyes small, 
round, dark (Sars), or whitish grey (Della Valle). Antenna 1 considerably 
more (Sars; Della Valle: less) than half as long as body, 24 joint rather 
longer than 1%, 34 about !/, as long as 24, flagellum longer than peduncle, 
10—22-jointed, accessory flagellum 1- or 2-jointed. Antenna 2 much shorter, 
ultimate joint of peduncle as long as penultimate, rather longer than 6- or 
7-jointed flagellum. Gmnathopod 1 in JS massive, 24 joint widening from 
narrow neck, 5tk extremely large, broad oval, armed with 4 teeth successively 
larger inwards toward base of 6tk joint, which is about '/, the size of 5th, 
somewhat oblong, but narrowing distally, with sinuous hind margin forming 
2 or 3 irregular lobes, finger strong, serrate; teeth of 5t% joint variable: 2—5. 
Gnathopod 2 in S, 24 joint strongly dilated, except at the extremities, Stk 
and 6th joints long and narrow, setose, palm and finger very small. Gnatho- 
pod 1 in ©, 24 joint not expanded, 5tk rather robust, shorter than oblong 
6{h, palm rather oblique, ill-defined, overlapped by finger. Gnathopod 2 
in Q, 24 joint not expanded, otherwise nearly as in 9, but smaller. Peraeo- 
pods 1—5 slender, 24 joint in peraeopeds 3—5 not greatly expanded, oblong 
in 34, long oval in 5tk, Uropod 3, rami subequal to peduncle, inner rather 
. the shorter. Telson rather longer than broad, apex convex (Sars in figure), 
or broader than long, apex concave (Della Valle), with 2 or 3 setules on each 
side of apex. Colour, densely variegated with dark brown. L. 4-8 mm. 


North-Atlantie with adjoining seas (Europe, from Norway to Venice (not all 
localities to be trusted); East of United States of America). 


4. M. stationis Della Valle 1881 M. gryllotalpa (err., non A. Costa 18531), 
Nebeski in: Arb. Inst. Wien, v.8 p.155 t.13 f.41 | 1880 M.g., Sowinski in: Mö&m. Soc. 
Kiew, &.6 p.128 t.5 f£.17a—d | 1893 M. stationis, A. Della Valle in: F. Fl. Neapel, 
v.20 p.415 t.5 f.2, t.10 £.31-—41 | 1895 M. s., Sowinski in: Mem. Soc. Kiew, v.14 
p- 237 t.4 £.1—6 | 1898 M. s., Sowinski in: M&m. Soc. Kiew, v.15 p. 480. 


Je ee Dr 


Mierodeutopus 591 


General aspect that of an Ampithoe (p. 631). Mouth-parts, peraeopods. 
and uropods as in M. gryllotalpa; uropods more slender. Head rather large. 
Side-plate 1 in S very much and acutely produced, in Q rhomboidal. Eyes. 
small, round. Antenna 1 rather slender, 24 joint longer than 1°, more than. 
thricee as long as 34, flagellum much longer than pedunele, 24-jointed, 
accessory flagellum longer than 34 joint of peduncle, 4-jointed. Antenna 2 
moderately robust, ultimate joint of peduncle as long as penultimate, much 
longer than the 8-jointed flagellum (Della Valle), or rather shorter than the 
9-jointed flagellum (Sowinski). Gnathopod 1 in S, 24 joint greatly expanded, 
5th massive but much longer than broad, produced into a large tooth, flanked 
by a smaller one (Sowinski: wanting) within the palm, and a minute one 
at its base on the hind margin; 6tk joint rather slender, with hind margin 
extremely sinuous, not crenate; finger serrate, rather small. Gmnathopod 2 
in d, 24 joint little expanded, 5tk and 6tk joints subequal, oblong, palm 
oblique, ill-defined, finger small. Gnathopod 1 in Q, 6% joint rather stout, 
a little longer than 5%, oblong, palm transverse, the rounded angle over- 
lapped by the finger. Gnathopod 2 in ©, 24 joint slender, 6tk stouter than 
in d and much longer than 5t", finger matching palm. Telson longer than 
broad, subelliptical with the apex feebly concave, without processes or setae. 
Colour blackish grey, except antennae and distal parts of limbs. L. 10—12 mm. 

Mediterranean (Naples, in fine sand, depth 10—20 m; Trieste); Black Sea, depth 
23—105 m. 


5. M. haswelli Stebb. 1879 Mierodeuteropus chelifer (non Stimpsonia cheli- 
fera Bate 1862!), Haswell in: P. Linn. Soc. N.S. Wales, v.4 p.340 t.22 f.3 | 1882 
Microdeutopus c., Haswell, Cat. Austral. Crust., p.265 | 1899 M. haswelli, T. Stebbing 
in: Ann. nat. Hist., ser. 7 v.3 p. 350. 


Eyes small, round. Antenna 1 fully half as long as body, flagellum 
longer than peduncle, accessory flagellum 3-jointed. Antenna 2 subpediform, 
nearly as long as antenna 1, peduncle stout, flagellum shorter than ultimate 
joint of peduncle, obscurely multiarticulate. Gmathopod 1 in J very large, 
24 joint apparently not expanded, 5tk massive, much longer than broad, 
widening distally, hind margin produced into a strong tooth, with a shorter 
and blunter one between it and the base of the 6! joint; 6tE joint very 
much smaller than 5t%, front margin convex, hind strongly concave, with 
small proximal tuberele; finger short, serrate. Gnathopod 2 small, 5tk joint 
ovate, 6% a little longer, palm undefined. Peraeopods 1 and 2 stout. 
Peraeopods 3—5, 24 joint long ovate, peraeopods 4 and 5 much longer 
than 34, Uropod 3 very small, rami short, subfoliaceous. Telson conical, 
armed above with a few slender hairs.. L. 5 mm. 

Port Jackson [East-Australia]. 


6. M. anomalus (H. Rathke) 1843 Gammarus a., H. Rathke in: N. Acta Ac. 
Leop., v.201 p.68 t.4 f.7 | 1855 G@. (Gammaropsis) a., W.Liljeborg in: Vetensk. Ak. Handl., 
1853 p.457 | 1859 Autonoe anomala, R. M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 
nr.1 p.25 t.1 f.4 | 1862 Microdeutopus anomalus, Bate, Cat. Amphip. Brit. Mus., p.379 | 
1876 M..a., A. Boeck, Skand. Arkt. Amphip., v.2 p.567 t.25 f.5 | 1893 M..a. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p.417 t.56 f.41 | 1894 M. a, G.O. Sars, Crust. 
Norway, v.1 p.540 t.191 | 1898 M.a., Sowinski in: Mäm. Soc. Kiew, v.15 p.480 t.10 
f.20—24 | 1869 Microdeuteropus a., A.M. Norman in: Rep. Brit. Ass., Meet. 38 p.281 | 1856 
Lembos cambriensis (nom. nud.), Bate in: Rep. Brit. Ass., Meet. 25 p.58 | 1857 L.c., 
Bate in: Ann. nat. Hist., ser.2 v.19 p. 142. 


Body very slender. Head, lateral lobes a little produced, rounded. 
Side-plate 1 sharply and much produced in J, quadrate in ©, with front 


592 "Mierodeutopus 


angle not obtuse. Side-plate 2 deepest in d, 3Xin 9. Pleon segment 3, 
postero-lateral eorners subquadrate, not acutely. Eyes small, round, black 
with whitish eoating. Antenna 1 °/, as long as body; 24 joint considerably 
longer than 1%, about thrice as long as 34; flagellum much longer than 
pedunele, about 22-jointed (Bruzelius: 20— 28), accessory flagellum 3—5-jointed. 
Antenna 2 much shorter, ultimate joint of peduncle subequal to penultimate, 
searcely longer than the 8-jointed flagellum. Gnathopod 1 in JS, 24 joint 
not widened, having (in Sars’ figure) a small denticle on upper part of front 
margin, 5tk very large, but much longer than broad, hind margin produced 
to a strong tooth with secondary tooth at its base outside, this being accompanied 
by 1 or several small teeth (but only 1 in figures), 6!" joint narrow, with strongly 
‚concave hind margin, angular near finger-hinge (Sars), or very sinuous, with distal 
half very convex, not angular (Sowinski); finger long, serrate. Gnathopod 2ind, 
6% joint as long as 5tk, scarcely so wide, narrowly oblong, palm and finger 
very short. Gmathopod 1 in ©, 24 joint with smooth margins, 5 nearly 
as long as 6th, which widens a little to the slightly oblique palm, finger 
‚overlapping palm. Gnathopod 2 in © nearly as in C, but smaller. Peraeo- 
pods 1 and 2 slightly armed. Peraeopods 3—5, 24 joint narrowly oblong, 
peraeopod 5 elongate, with the usual faseicle of setae at hind apex of 6 
joint. Uropod 3, inner ramus rather the shorter, as long as peduncle. 
Telson a little longer than broad, apex slightly angular, with 3 slender 
spines on each side (Sars), or.convex between distinetly outdrawn subacute 
points (Sowinski). Colour whitish, sometimes with reddish tinge, mottled 
with dark brown spots in transverse bands. L. 6—9 mm. 

North-Atlantie (South-West-Norway, at least to Trondhjemsfjord, depth 11-56 m; 
Shetlands, depth 128—164 m); Black Sea, depth 54—64 m. 


7. M. propinquus O0. Sars 1894 M. danmoniensis (err., non Lembos dam- 
nomiensis Bate 1856!), M. propingvus, G.O.Sars, Crust. Norway, v.1 p. 542; t.192 £.1. 

Closely allied to M. anomalus (p. 591), but differing at follows. Eyes 
rather larger, rounded oval. Antenna 1, flagellum little longer than peduncle, 
accessory flagellum of 2 equal joints. Gmathopod 1 in CS, tooth of 5 joint 
less elongate, the accessory tooth a little removed from it, 6% joint with 
hind margin less eoncave; gnathopod 1 in © less slender, 6% joint con- 
siderably longer than 5tk. Peraeopod 5 less elongate. Colour whitish, 
mottled with dark brown. L. d 5 mm. 

North-Atlantie (Norway). Very shallow water. 


8. M. megnae Giles 1888 M.m., G. M. Giles in: J. Asiat. Soc. Bengal, v.57 
pP-281 1.7 £.1-—4. 

Head without rostrum; lateral lobes obtuse, little prominent. Side- 
plates shallow, 1° not strongly produced, 34 deeper than 24 or 4, Pleon 
segment 3, postero-lateräl corners rounded. Eyes small, rounded, black. 
Antenna 1 about half as long as body, 24 joimt longer than 1%, 34 about 
!/, as long as 1%, flagellum much shorter than peduncle, 10—14-jointed, 
accessory flagellum very small, 1-jointed. Antenna 2 stouter than antenna 1, 
subequal in. length; ultimate joint of peduncle as long as penultimate, longer 
than flagellum of 10—12 very short joints. Mandible, 24 and 34 joints of 
palp subequal, neither much longer than the 1°. Gnathopod 1 im S, 24 joint 
much expanded, 5'% massive, longer than broad, hind margin produced into 
a slender tooth, 6% joint very short, nearly quadrangular, hirsute, finger strong 
and a little varieose, but otherwise unarmed. Gnathopod 2 in J short, slender, 
imperfeetly subchelate, 6% joint shorter than 5th, widening (in figure) to an 


Mierodeutopus 593 


oblique palm; finger reaching the obtuse defining angle. Gnathopod 1 in o 
much smaller than in S, 6th joint larger than 5t%, palm feebly defined. 
Gnathopod 2 in © smaller and more slender than the 1%. Peraeopod 1 
shorter than peraeopod 2; finger in both rather long and falciform. Peraeo- 
pods 3—5 as usual in the genus. Uropods 1—3 reaching about the same 
level; peduncle of uropod 3 extremely short. Telson short, armed above 
with a pair of peculiar conical protuberances bearing each a single strong 
bristle. Colour dirty white, somewhat pellueid. L. 4—5 mm. 


Bay of Bengal (Megna Shoals). Taken in the surface net, depth about 11 m. 


9. M. versiculatus (Bate) 1856 Lembos v. (nom. nud.), Bate in: Rep. Brit. 
Ass., Meet.25 p.58 | 1857 L.v., Bate in: Ann. nat. Hist., ser.2 v.19 p.142 | 1862 
Microdentopus v., Bate, Cat. Amphip. Brit. Mus., p.165 t.30 f.5 | 1895 Microdeutopus v., 
A.O. Walker in: Ann. nat. Hist., ser.6 v.15 p.469 | 1869 Microdeuteropus v., A.M. 
Norman in: Rep. Brit. Ass., Meet. 38 p. 282 | 1874 M. v., T. Stebbing in: Ann. nat. Hist., 
ser. 4 v.14 p.12 t.1 f.2,2a—f | 1876 Autono& longipes (part.)?, A. Boeck, Skand. Arkt. 
Amphip., v.2 p.574 | 1893 Microdeutopus anomalus (part.)?, A. Della Valle in: F. Fl. 


. Neapel, v.20 p.418. 


Head without rostrum, lateral lobes obtuse, little produced. Side-plate 1 
acutely produced in d. Pleon segment 3, postero-lateral corners obtusely 
quadrate. Eyes rather large, dark. Antenna 1, 24 joint longer than 1, 
about twice as long as 34; flagellum 15-jointed, accessory flagellum 1-jointed. 
Antenna 2, ultimate joint of peduncle subequal to penultimate, rather longer 
than the 6-jointed flagellum. Gmathopod 1 in J massive, the bulk depending 
chiefly on the very broad and long 5tk joint, of which the hind margin is 
produced into a strong, slightly outward curving tooth; the small 6% joint, 
short and stout, with a median tubercle on the hind margin, elosely approxi- 
mates the tooth of the 5tt, which is erossed by the short serrate finger. 
Gnathopod 2 in S very slender, hirsute on 4—6th joints with long plumose 
setae, 4th acute at apex, 5th longer than 6%, together forming a geniculation, 
palm and finger very small. Gnathopod 1 in Q, 5#k joint rather longer than 
6%, but about equal in breadth, palm rather oblique, feebly defined, over- 
lapped by finger. Gnathopod 2 in Q as in d. Peraeopods 1 and 2, 4th and 
5th joints a little widened, finger nearly as long as 6!" joint. Peraeopods 3—5, 
24 joint pretty well expanded; peraeopod 5 the longest. Uropod 3, rami 
little longer than pedunclee L. 4—5 mm. 

North-Atlantie and English Channel (Plymouth; Saleombe Harbour; Shetland, depth 
128-146 m). 


10. M. damnoniensis (Bate) 1856 Lembos d. (nom, nud.), Bate in: Rep. Brit. Ass., 
Meet. 25 p.58 t.17 f.9 | 1857 L. d., Bate in: Ann. nat. Hist., ser.2 v.19 p. 142 | 1857 L. 
danmoniensis, A. White, Hist. Brit. Crust.. p. 180 | 1862 Miorodentopus gryllotalpa (err., 
non Microdeutopus g. A. Costa 1853!), Bate, Cat. Amphip. Brit. Mus., p. 163 t. 30 f.1| 
1876 Microdeutopus g., A. Boeck, Skand. Arkt. Amphip., v.2 p. 565 | 1893. M. anomalus 
(part.) + M. algicola, A. Della Valle in: F. Fl. Neapel, v.20 p.417; p.418 t.1 f.3; 
t.11 f. 1—12. 


Distinguished from M. propinguus by the gnathopod 1 in CS, which has 
no accessory tooth on the 5% joint, and the 6!" joint of almost uniform breadth. 
Antenna 1, accessory flagellum with 1 (Bate) or 2 (Della Valle) joints. Lateral 
processes of telson rather prominently developed, with several setules on its sur- 
face. Colour greenish grey, with some black spots. L. 4+5—6 mm. 


English Channel (South England); Bay of Naples, among algae, 
Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 38 


594 Mierodeutopus, Lembos 


M.titii Heller 1866 M. t., Cam. Heller in: Denk. Ak. Wien, %.2611 p.48 t.4 
f.8 | 1893 M. t., A. Della Valle in: F. Fl. Neapel, v.20 p. 420. 

Perhaps identical with M. damnoniensis (p.593); but antenna 2 considerably longer 
than antenna 1. L. 5 mm. 


Adriatie (Pirano). 


4. Gen. Lembos Baäte 


1855 [Subgen.] Gammaropsis (part.), W. Liljeborg in: Vetensk. Ak. Handl., 1853 
p- 455 | 1856 Lembos (nom. nud.) (part.), Bate in: Rep. Brit. Ass., Meet. 25 p. 58 | 1857 L. 
(part.), Bate in: Ann. nat. Hist., ser. 2 v. 19 p.142 | 1895 L., T. Stebbing in: Ann. nat. Hist., 
ser. 6 v.16 p.207 | 1859 Autonoe (part.), R.M. Bruzelius in: Svenska Ak. Handl., n. ser. 
v.8 or.1 p.23 | 1888 A., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1081 | 1893 A., 
A. Della Valle in: F.Fl. Neapel, v.20 p.398 | 1894 Autonoe, G.O. Sars, Crust. Norway, 
v.1 p. 546, 


In general agreement with Aora (p. 587), also with well developed 
flagella of antenna 1, but in gnathopod 1 of the S the 4b joint is not 
elongate, the 5t" and 6th joints are stout, subequal in width, strongly setose, 
and the palm of the 6t% has tooth-like projeetions. In L. arctieus the maxilli- 
peds have the outer plates exceptionally small. 


9 species accepted, 2 doubtful. 


Synopsis of accepted species: 


Without Haas of a; .. ii E .n an. 1. L. longidigitans . p.594 
Not without trace of eyes — 2. 
Maxillipeds, outer plates very short; peraeopods 

3—5, 24 joint very nartow. . . 2... 2. L. areticus. . . . p.5% 
Maxillipeds, outer plates not very short; peraeo- 

pods 3—5, 2d joint moderately narrow — 3. 


Ventral surface of peraeon armed with many spines 3. L. spiniventris. . p.59 
Ventral surface of peraeon not armed with spines — 4. 


Peraeopods 1 and 2 in d both having 4th joint 
0 VE TE 4. L. hirsutipes. . . p.596 
Peraeopod 1, but not peraeopod 2, in S having 


| 4th joint strongly setose. .. .».. 2.2... 5. I. megacheir. . . p.596 


1 
2 


3 


4 


Peraeopods 1 and 2 in & neither having 4th joint 
strongly setose — 5. 


Gnathopod 1 in 3, 2d joint densely setose at lower 

N RE E e  a 6. L.longipes . . . p. 597 
Gnathopod 1 in 3, 24 joint not ee setose at 

lower hind corner — 6. 


Lower lip, hind processes very long; mandible, 
spines of spine-row very numerous . . .. .- 7. L. philacanthus . p.598 

Lower lip, hind processes of moderate length; ; 
mandible, spines of spime-row in moderate 
number — 7. 


Gnathopod 2, 24 joint strongly dilated. . ... . 8. L. kergueleni . . p.598 


? Gnathopod 2, 24 joint not dilated . .... .. 9. L. websterii.. . . p.599 


1. L. longidigitans (Bonnier) 1896 Autonoe l., J. Bonnier in: Ann. Univ. Lyon, 
v.26 p. 659 t.40 f.1 | 1899 Lembos l., T. Stebbing in: Ann. nat. Hist., ser.7 v.3 p.350. 


Head without rostrum, lateral lobes not at all prominent. Side-plate 
1 in J quadxate. Pleon segment 3, postero-lateral corners much rounded. 


ED a be an 1 a en AL un u An a A a LK" ar A ne a DA A u si m ME Die me 


Lembos 595 


Eyes and eye-pigment entirely wanting. Antennae 1 and 2 broken. Man- 
dible, 34 joint of palp longer than 24, distal margin concave. Gmnathopod 1 
in d, 24 joint stout except proximally, 5tt and 6!" nearly equal in width 
and length, palm towards the middle emarginate and raised into a strong 
tooth, finger shorter tban 6!" joint but much overlapping palm. Gmnatho- 
pod 2 ind much smaller, 24 joint little dilated, 6" joint rather larger 
than 5t", finger a little overlapping the palm. Gnathopod 1 in O, 24 joint 
not dilated, 6tk wider than 5th, palm very oblique and ill-defined. Gnatho- 
pod 2 in Q nearly as in J, but shorter, palm more transverse. Peraeopods 
1 and 2 slender, little setose, 24—5tb joints glandular, finger long, as 
long as 6th joint. Peraeopods 3—5, 24 joint oval; peraeopod 5 elongate. 
Uropod 3, rami nearly equal, little longer than peduncle. Telson rounded 
oval, with setules at each lateral process. L. about 6 mm. 
Bay of Biscay. Depth 950 m. 


2. L. arcticus (H.J. Hansen) 1887 Microdeutopus a., H.J. Hansen in: Dijmphna 
Uab., p.231 t.22 £.3 | 1894 M. a., T. Stebbing in: Bijdr. Dierk., v.17 p.48 | 1893 Au- 
tonoe arctica, A. Della Valle in: F. Fl. Neapel, v.20 p. 406 t.56 f. 35, 36 | 1895 Lembos 
arcticus, T. Stebbing in: Ann. nat. Hist., ser. 6 ®.16 p. 207. 


Side-plate 1 rather smaller than 24, its apex acute, not aculeate, 
24 —4th rotundo-quadrate, 5th nearly as deep as 4th, with shallow straight 
hind lobe. Pleon segment 3, postero-lateral corners quadrate, in 4" produced 
to a small tooth. Eyes very small. Antenna 1 not reaching end of 34 
pleon segment, 24 joint longer than 1°, 34 short, flagellum much longer 
than peduncle, 35-jointed; accessory flagellum 7-jointed. Antenna 2 about 
!/, as long as antenna 1, ultimate joint of peduncle shorter than penultimate, 
but at least as long as the 7-jointed flagellum. Mandible, 34 joint of palp 
considerably longer than 24. Maxillipeds, outer plates much smaller than 
is usual in the genus. Gnathopod 1, 5" joint shorter than 6®h, rather broad 
except at base, hind margin setose, 6% with groups of setae on distal half 
of front, and along hind margin, widening to and at the convex transverse 
palm, this being sharply defined by a small acute tooth, which is crossed 
by the apex of the finger. Gnathopod 2, 5th joint setose, wider but rather 
shorter than the narrowly oblong and very setose 6", which has a short 
transverse palm, overlapped by the denticulate, spinulose finger. Peraeopods 
1 and 2 rather slender, 4! joint rather longer than 5t%, 6fh Jonger than 5tk 
and much more slender, finger slender, acute. Peraeopods 3—5, 24 joint 
very narrow; peraeopod 4 much longer than 34, 5" than 4, Uropods 1 
and 2, rami equal in length, in uropod 2 one stouter than the other. 
Uropod 3, peduncle short, pentagonal; inner ramus a little longer than 
the outer. Telson, upper half semicircular, lower triangular, with strong 
prominence on each side of the base of the triangle, carrying 3 unequal setules. 
Colour whitish, with 4 longitudinal rows of brown grey blotches. L. 29 mm. 

Kara Sea (lat. 70° N.). Depth 37—-96 m. 


3. L. spiniventris (Della Valle) 1893 Autonoe s., A. Della Valle in: F. Fl. 
Neapel, v.20 p.400 t.5 £.7; 1.56 £.17—84 | 1895 Lembos s., T. Stebbing in: Ann. nat. 
Hist., ser. 6 v.16 p. 207. 


“ Body moderately robust, peraeon segments 1 and 2 narrow, ventral 
surface of peraeon armed with many large spines (only in C?). Head short 
with straight, very acute. rostrum. Side-plate 1 in d, front angle very 
acutely prolonged, in Q subacute, in side-plate 2 in S acute, not much 
prolonged, in © blunt; side-plate 5 notably less deep than 4". Eyes brown. 


38* 


596 Lembos 


Antenna 1, 1° joint °/, as long as 24, 34 Jess than half as long as 1%, flagellum 
longer than pedunele, 20-jointed, accessory flagellum 8-jointed. Antenna 2 
shorter, ultimate joint of peduncle as long as penultimate, longer than the 
8-jointed flagellum. Upper lip semiecircular. Mandible, 34 joint of palp longer 
than 24. Maxillal, inner plate rudimentary, without setules. Maxillipeds, outer 
plates rather large, strongly armed. Gnathopod 1 in J, 5tk joint a little 
shorter than 6th; 6th oval, palm slightly oblique, well defined, but without 
a tooth, a small cavity occupying about '/, of its length adjacent to the 
defining angle, which is slightly overlapped by the serrate finger. Gnatho- 
pod 2 in JS rather smaller, similar, except that the palm is more oblique,- 
simply and slightly convex. Gnathopod 1 in O, palm straight, oblique, 
otherwise nearly as in d. Gnathopod 2 in Q narrower than gnathopod 1, 
palm less oblique. Peraeopods 1 and 2 as in L. arcticus (p. 595), or finger 
rather longer. Peraeopods 3—5 as in L. arctieus, except that the 24 joint 
is rather more expanded, especially in peraeopod 5. Pleopods 1—3, peduncle 
rather large, outer ramus the shorter. Uropod 3, peduncle short and stout, 
rami twice as long as peduncle, nearly equal. Telson longer than broad, 
a setule in the indent on each side of rounded apex. Colour, bands of rose 
alternating with sulphur-yellow or white. L. 5—7 mm. 


Bay of Naples. Depth 10—20 m. 


4. L. hirsutipes Stebb. 1895 L.h., T. Stebbing in: Ann. nat. Hist., ser.6 v.16 
p. 207 t.8, t.9B. 


Side-plate 1 in S subacutely produced, in Q subrhomboidal. Pleon 
segment 3, postero-lateral corners obtusely quadrate. Eyes small. Antenna 1, 
15t joint rather long, rest unknown. Antenna 2, antepenultimate joint of 
peduncle much thicker than penultimate, ultimate rather shorter than penultimate 
and longer than the 4- or 5-jointed flagellum. Gmathopod lin J, 24 joint with 
brush of long setae at hind distal end; 5" joint nearly as broad as 6!" but con- 
siderably shorter; 6% broad, oblong, palm transverse with deep narrow cleft 
between a submedian tooth and the rather long and sinuous defining tooth, 
beyond which the apex of the denticulate finger projects. Gnathopod 2 ind, 
24 joint somewhat expanded, oval; 5tk joint rather longer and broader than the 
oblong 6*R, both setose on both margins, the 5th having a group of very long ° 
setae at the hind apex, and the 6! many such along the front; palm short, not 
sharply defined, overlapped by the finger. Gnathopod 1 in ©, 24 joint slender, 
unarmed, 6th joint much longer than 5t" and slightly broader, palm with 
a little triangular indentation. Gnathopod 2 in Q, 24 joint slender, other joints 
nearly as in 9, but 5!" and 6tk much more sparsely furnished in front 
though similarly on the hind margin. Peraeopods 1 and 2 in JS, but not 
in O,having the large 4th joint on both margins densely fringed with long 
simple setae. Peraeopod 3, 24 joint moderately expanded, 6! longer than 
4th or 5th, slightly eurved, reverted; finger short. Peraeopod 4 longer, 6! joint 
straight, not reverted, finger short. Peraeopod 5? Pleopods 1—3, outer 
ramus much shorter than inner, both with 10 joints. Uropod 3, rami equal. 
Telson as long as broad, with 2 setae at each lateral process, apex rounded. 
L. 4 mm. 


Off Cape of Good Hope. 


5. L. megacheir (0. Sars) 1879 Autono& m., G.O. Sars in: Arch. Naturv. 
Kristian., v.4 p.458 | 1894 A. m., G. O. Sars, Crust. Norway, v.1 p.550 t.195 f.2 | 1895 
Lembos m., T. Stebbing in: Ann. nat. Hist., ser.6 v.16 p.207 | 1893 Autonoe longipes 
(part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 408. 


; 
3 
F 
. 


ee Va 


a € 


A Se ze a ET a EEE Be 
FR Fi yon RE - 2 ne Br Me 


Lembos . | 597 


Body rather slender, near to L. longipes. Side-plate 1 as in J and © 
of L. spiniventris (p. 595), 2—4th rotundo-quadrate, 5th nearly as deep as 4th, 
Pleon segment 3, postero-lateral corners subquadrate. Eyes without visual 
elements, represented by patch of whitish pigment on each side. Antenna 1 slender, 
nearly as long as body, 24 joint much longer than 1°, thrice as long as 34, 
flagellum nearly twice as long as peduncle, about 20-jointed, accessory 
flagellum 4-jointed. Antenna 2 little over half as long as antenna 1, ulti- 
mate joint of peduncle as long as penultimate, longer than flagellum. Gnatho- 


‚pod 1in d, 24 joint with tuft of short setae at lower hind corner; 34—5th 
.densely setose only along hind margin; 5th a little shorter than 6th; 6th broad, ' 


oblong oval, but with nearly transverse palm, defined by a sharp tooth 
separated from a submedian angle by an excavation; apex of finger crossing 
the defining tooth. Gnathopod 2 in CS slender, the rather long and narrow 
5th and 6tk joints densely setose on both margins, especially the front, palm 
short, slightly oblique, matching finger. Gnathopod 1 in ©, palm oblique, 
not strongly defined. Gnathopod 2 in O much smaller than gnathopod 1, 


‘shaped as in the 9, but slightly furnished on front margin. Peraeopod 1 


in S, but not peraeopod 2, having 4% joint densely setose on both margins, 
but especially on the front. Peraeopods 3—5, 24 joint little expanded; peraeo- 
pod 5 very elongate in d and 9. Uropod 3, inner ramus somewhat larger 
than the outer. Telson with a setule on either side of the apex. Colour 
uniformly yellowish. L. d 8 mm. 


Arctic Ocean, North-Atlantie and North-Sea (Norway Fam Stavangerfjord up 
to Finmark). Depth 94—564 m. 


6. L. longipes (Lilj.) 1852 Gammarus 1., W. Liljeborg in: Öfv. Ak. Förh., v.9 p. 10| 
1855 @. (Gammaropsis)l., W.Liljeborg in: Vetensk. Ak. Handl., 1853 p.457 | 1859 Autonoel., 
R.M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 nr.1 p.28 | 1893 4.1. (part.), A 
Della Valle in: F. Fl. Neapel, v.20 p.403 | 1894 Autonoe l., G. O. Sars, Crust. Norway, 
v.1 p.549 t.195 f£.1 | 1895 A.1., A. M. Norman in: Ann. nat. Hist., ser.6 v.15 p. 490 | 
1862 Microdentopus 1., Bate, Cat. Amphip. Brit. Mus., p.166 | 1895 Lembos I., T. Stebbing 
in: Ann. nat. Hist., ser. 6 v.16 p.207 | 1871 Autonoe plumosa, A. Boeck in: Forh. Selsk. 
Christian., 1870 p.239 | 1876 Autono& longipes (part.) + A.p., A. Boeck, Skand. Arkt. 
Amphip., v.2 p.572 t.25 f.2; p.574 t.25 f.3. 


« Body more slender and side-plate 1 in less produced than in L. websterii 
(p. 599). Pleon segment 3, postero-lateral corners rotundo-quadrate. Eyes small, 
rounded, black. Antenna 1 about °/, as long as body, 24 joint much longer 
than 15, thrice as long as 3; flagellum longer than peduncle, about 18-jointed; 
accessory flagellum 3- or 4-jointed. Antenna 2 much shorter, ultimate joint 
of peduncle as long as penultimate, rather longer than the 6-jointed flagellum. 
Gnathopod 1 in 9, 24 joint broad, with dense brush of long setae at lower 
hind corner, 4 and 5th with faseiecles of setae on hind margin, 5th fringed 
only on distal part of front margin, 6 all along it; 6tk longer than 5th, 
oblong oval; palm bidentate but oblique, so that the tip of the larger defining 
tooth does not reach the level of the smaller inner tooth. Gnathopod 2 in CS 
nearly as long as gnathopod 1 but much more slender, 5t" joint longer than 6*#, 
both long and setose, especially on the front margin; palm short, rather 
oblique. Gnathopod 1 in O not robust, 6th joint rather longer than 5, 
widening a little to the rather oblique palm, defined by an obtuse angle and 
slender spine. Gnathopod 2 in O rather more slender, 6" joint subequal to 5%, 
narrow, palm almost transverse. Peraeopods 1—5 slightly armed. Peraeo- 
pods 3—5, 24 joint oblong oval. Peraeopod 5 much the longest. Uropod 3, 


598 Lembos 


rami subequal, nearly twice as long as peduncle. Telson rounded oval, 
somewhat tapering, with 2 or 3 setae on each side of apex. Colour whitish, 
with light reddish transverse bands, but no specks. L. reaching nearly 12 mm. 


Kara Sea; Kattegat; North-Atlantie, North-Sea and Skagerrak (South- and 
West-Norway at least to Trondhjemsfjord). Depth 19—274 m. 


7. L. philacanthus (Stebb.) 1888 Autonoe philacantha, T. Stebbing in: Rep. 
Voy. Challenger, v.29 p.1082 t.110 | 1895 Lembos p., T. Stebbing in: Ann. nat. Hist., 
ser.6 v.16 p.207 | 1893 Autonoe longipes (part.)?, A. Della Valle in: F. Fl. Neapel, 
0.20 p. 405. 


Head, rostrum scarcely perceptible; lateral lobes small, acute. Side- 
plate 1 small, not produced forward. Pleon segment 3, postero-lateral eorners. 
rounded. Eyes small, narrow, reniform, set obliquely on lateral lobes of 
head. Antenna 1, 1° joint longer than head, 24 much longer than 1%, 
34 scarcely '/, as long as 1%; flagellum longer than peduncle, more than 
18-jointed; aecessory flagellum 7-jointed. Antenna 2 shorter, ultimate joimt 
of peduncle about as long as penultimate, scarcely so long as the 9-jointed 
flagellum. Upper lip, distal margin almost straight. Lower lip (Fig. 102), 
mandibular process thin and unusually long. Mandible, spine-row of 12 spines, 
molar with accessory process; 39 joint of palp rather shorter than 24, with dense 

group of pectinate spines and cilia near the 

middle. Maxilla 1, inner plate with 1 plumose 

seta. Maxillipeds, inner and outer plates broad, 

Mandibular wellarmed. Gnathopod 1, 24 joint devoid of 
PROF Jong setae; 5thand 6th joints massive, spinose, 
5th rather longer than broad, rather shorter 

than 6%", whieh has the hind margin much 

shorter than the convex front; palm oblique, 

sinuous, finely but irregularly denticulate, 
defined by a tooth serrate on the inner side and there carrying a long 
palmar spine, the sharp apex of the curveä serrate finger elosing against 
this on to the surface of the joint. Gnathopod 2 smaller, 6% joint as long 
as 5th, almost oblong; palm nearly transverse, slightly sinuous, finely pectinate, 
well defined, the specimen having a palmar tooth m only one of the 24 gnatho- 
pods; finger serrate, matching palm. Peraeopods 1 and 2, 24and 4% joints 
glandular, 4% much longer than 5tk or 6th, feebly armed; finger short. 
Peraeopods 3—5, 24 joint little expanded. Uropods 1—3 spinose, uropod 2 
stout, 3% with short peduncle, inner ramus the longer. Telson scarcely longer 
than broad, with 5 setiform spines at each subapieal corner. L.J (?) about 11mm. 


Bass Strait (East Moneoeur Island). Depth 71 m. 


Fig. 102. L. philacanthus. 
Lower lip. 


8. L. kergueleni (Stebb.) 1888 Autonoe k., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1087 t.111 | 1895 Lembos k., T. Stebbing in: Ann. nat. Hist., ser. 6 v.16 p.207 | 
1895 Autonoe longipes (part.)?, A. Della Valle in: F. Fl. Neapel, «.20 p.405.- 


Head with small rostrum; lateral lobes little produced, acute. Side- 
plate 1 obtusely produced. Pleon segment 3, postero-lateral eorners minutely 
notched, border above bulging. Eyes small. Antenna 1, 1% joint longer. 
than head; rest unknown. Antenna 2, antepenultimate joint of peduncle 
broad, ultimate joint of peduncle as long as penultimate, rather longer than 
the 7-jointed flagellum. Lower lip, mandibular process rather long, acute. 
Mandible, spines of spine-row 5 or 6; 34 joint of palp fully as long as 24. 
Other mouth-parts nearly as in L. philacanthus. Gnathopod 1 not very setose, 


Le 


a a u a 


VB SE ana Fa Velen d 
net "Ser Bea Pia FI ee 


Lembos 599 


„such fascieles as there are being chiefly on hind margin of 3d—6tk joints; 


5th joint stout, much shorter than 6%, which widens a little to the transverse 
bidentate palm, the defining tooth separated by a cavity from a smaller 
submedian tooth, between which and the finger-hinge the palm is sinuously 
‚denticulate; apex of almost smooth finger elosing against inner margin of 
the defining tooth. Gnathopod 2 narrower, except the broadly expanded, 
oval 24 joint; 5tk broader than 6%, a little shorter, with long setae fringing 
distal 2/, of front; 6 oblong, the rather convex front margin strongly 
fringed; palm pectinate, almost transverse, defined by obtuse angle and 
'palmar spines, a little overlapped by the short, stout, serrate finger. Peraeo- 
pods 1 and 2 slightly armed. Peraeopods 3—5, 24 joint not much expanded; 
'peraeopod 4 much longer than 34, 5th than 4th; finger not long. Uropod 3, 
rami short, subequal, longer than pedunele. Teison oval, narrowing distally, 
‘with a seta at the notch on each side of the rounded apex. L. about 5 mm. 


Cumberland Bay [Kerguelen Island]. Depth 239 m. 


9. L. websterii Bate 1856 L. w. (nom. nud.), Bate in: Rep. Brit. Ass., 
"Meet. 25 p.58 | 1857 L. w., Bate in: Ann. nat. Hist., ser.2 v.19 p.142 | 1895 L. w., 
‘T. Stebbing in: Ann. nat. Hist., ser.6 v».16 p.207 | 1862 Microdeutopus w., Bate & 
Westwood, Brit. sess. Crust., v.1 p.291 f. | 1862 Microdentopus w., Bate, Cat. Amphip. 


- Brit. Mus., p.164 t.30 f.2 | 1869 Microdeuteropus websteri, A.M. Norman in: Rep. Brit. 


‚Ass., Meet. 38 p. 282 | 1887 Microdeutopus w., Chevreux in: Bull. Soe. zool. France, v.12 
p-312 | 1894 Autonoe w., G.O. Sars, Crust. Norway, v.1 p.547 t.194 | 1876 Microdeuteropus 


' ‚bidentatus, T. Stebbing in: Ann. nat. Hist., ser.4 0.17 p.78 t.4 £.1a; t.5 f.1, 1b | 1876 


Autono& longipes (part.), A. Boeck, Skand. Arkt. Amphip., v.2 p.572 | 1893 Autonoe I. 
«(part.), A. Della Valle in: F. Fl. Neapel, v.20 p.403 t.3 £.13; t.10 f. 20—30. 


Body rather tumid in ©. Side-plate 1 in J acutely produced, in © 
‚subrhomboidal. Pleon segment 3, postero-lateral corners rotundo-quadrate. 
Eyes very small, rounded oval, dark. Antenna 1 more than '/, as long as 
body, 24 joint longer than 1°, not thrice as long as 34, flagellum longer 
than peduncle, with about 15 joints, accessory flagellum with 4 or 5 joints, 
last minute. Antenna 2 much shorter, ultimate joint of peduncle as long 
as penultimate, longer than the 4- or 5-jointed flagellum. Gnathopod 1 
in 9, 24 joint without brush of long setae at lower hind corner; 4 and 
5th with long setae on hind margin; 5!" and 6tk densely fringed on convex 
front margin, both stout, subequal: palm transverse, defined by a strong 
'tooth, separated by a cavity from a smaller inner one, while on the outer 
side a palmar spine springs from a small prominence (Della Valle: a little 


'tooth); the serrate finger reaching the tip of the spine. Gnathopod 2 in G, 


22 joint with lower front corner a little produced outward; 5th and 6®h jointg 
long and narrow, densely fringed on both margins, especially the front, palm 
:short, nearly transverse, a little overlapped by the short finger. Gnathopod 1 
in ©, 6 joint much longer than 5t", oblong oval, palm ill-defined, finger 
serrate. Gmnathopod 2 in © much smaller, similar to gnathopod 2 in GC, 
but smaller, corner of 24 joint not produced, front of 5t",and 6% not densely 
fringed. Peraeopods 1 and 2 slightly armed. Peraeopods 3—5, 24 joint 
‘oblong oval, not very broad; peraeopod 5 much the longest. Uropod 3, 


rami nearly equal, not much longer than peduncle. Telson rounded oval, 


with 3 spines on each side of the somewhat angular tip. Colour whitish, 


"with narrow transverse bands of dark brown specks. L. 5—6 mm. 


North-Atlantie with adjoining seas (south and west of Norway, north and south of 


‘Great Britain, France); Mediterranean (Naples). Generally in comparatively shallow water. 


600 Lembos, Lemboides 


L. fuegiensis (Dana) 1853 & 55 Gammarus f., J. D. Dana in: U. S. expl. Exp., 
e.1311 p. 954; t.65 f.8a—h | 1862 Moera f., M. fuegeensis, Bate, Cat. Amphip. Brit. 
Mus., p.194 t.35 f.4 | 1893 Microdeutopus (part.)?, A. Della Valle in: F. Fl. Neapel, 
v.20 p.425. 

L. 7 mm. 


South-Paeific? (Feejee Islands). 


L. tenuis (Dana) 1852 Gammarus t., J. D. Dana in: P. Amer, Ac., v.2 p.211| 
1853 & 55 @. t., J. D. Dana in: U. S. expl. Exp., v. 13u p.950; t.65 f.5a—e | 186% 
Microdentopus t., Bate, Cat. Amphip. Brit. Mus., p. 165 t. 30 f.4 | 1893 Microdeutopus t.,. 
A. Della Valle in: F. Fl. Neapel, v.20 p. 420 | 1894 Autono&? t., &. O. Sars, Crust. Norway, 
v.1 p. 547 | 1895 Lembos? t., T. Stebbing in: Ann. nat. Hist., ser. 6 ©. 16 p. 207. 

L. 6 mm. 


Sooloo Sea. Depth 12 m. 


5. Gen. Lemboides Stebb. 
1895 Lemboides (Sp. un.: L. afer), T. Stebbing in: Ann. nat. Hist., ser. 6 0.16 p.209. 


Like Lembos (p. 594), but aeccessory flagellum of antenna 1 shorter thanı 
34 joint of pedunele, and in gnathopod 1 of the J the 5th joint is much 
broader and longer than the 6", though not dentate or opposable to the finger. 


2 species. 
Synopsis of species: 


Antenna 1, 2@ joint not longer than 1t ......... 1 Lafer... . p.600 
Antenna 1, 24 joint much longer than 1 ........ 2. L. australis . p. 601 


1. L. afer Stebb. 1895 L. a., T. Stebbing in: Ann. nat. Hist., ser.6 v.16 p.209 
t. 9a, 10. 


Side-plate 1 in J broader but rather less deep than the following, not. 
acuminate; no side-plate very large. Pleon segment 3 large, postero-lateral 
corners rounded. Eyes small, dark. Antenna 1 about '/, as long as body, 
1° joint slightly longer than 24; 34 about '/, as long as 24; flagellum 
rather longer than peduncle, about 15-jointed; accessory flagellum not as: 
long as 1° joint of primary, with 2 joints, 24 minute. Antenna 2 shorter, 
antepenultimate joint of peduncle as long as broad, with expansion of lower‘ 
edge, ultimate joint of peduncle shorter and much narrower than penultimate, 
longer than the 3- or 4-jointed flagellum. Gnathopod 1 in d, 4tk joint. 
acute, 5'% much broader than 24 and as long, distal margin straight, not 
covered by base of 6tk joint, of which the palm is rather oblique, having a 
broad dentieulate cavity between a strong tooth near the finger-hinge and: 
a smaller one near to a still smaller defining tooth, against which the serrate 
finger impinges. Gmnathopod 2 in d more slender, otherwise rather like 
gnathopod 1, but 5t% joint not broader than 24; 6th shorter and rather 
narrower than 5t%; both plumose; the palm forming a small cavity between 
a tooth near the finger-hinge and the defining point, which the rather short 
finger just reaches. Gmathopod 1 in Q, 5tk joint densely setose on hind- 
margin, only a little longer and broader than the 6%, which is setose on 
both margins and has a short palm, overlapped by the serrate finger. Gnatho- 
pod 2 in 9 with long plumose setae along the front, 5tk joint distally widened,. 
6th longer, narrow, the small finger fitting the short convex palm. Peraeo- 
pod 1, 4th joint plumose on front margin, more so than in peraeopod 2. 
Uropods 1-—3, outer ramus shorter than inner; inner ramus of uropod 2 


Lemboides, Dryopoides 601 


stoutest of all. Telson as long as broad, lateral processes of shallowly 
rounded apex each with 5 spinules. L. about 6 mm. 


Off Cape of Good Hope. 


2. L. australis (Hasw.) 1879 Microdeuteropus a., Haswell in: P. Linn. Soe. 
N.S. Wales, v.4 p.271 t.11 f.5 | 1882 Microdeutopus a., Haswell, Cat. Austral. Crust., 
p.263 | 1888. Autonoe a., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1087 | 1899 
Lemboides a., T. Stebbing in: Ann. nat. Hist., ser.7 v.3 p.350 | 1893 Autonoe longipes 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 403. 


Antenna 1 longer than head and peraeon; 24 joint twice as long as 
1st, 34 very short; flagellum longer than peduncle, accessory flagellum small 
(in figure). Antenna 2 nearly °/, as long as antenna 1, ultimate joint of 
pedunele shorter than penultimate, longer than flagellum, which is armed 
with hooked setae. Gmathopod 1 large, subchelate; 4!" joint small, narrow; 
5th Jarge, armed with a few scattered hairs; 6% smaller (in figure much 
smaller), irregularly quadrate, rather longer than broad, palm scarcely oblique, 
deeply excavate, denticulate, defined by a triangular tooth; finger stout, 
dentieulate, apex (in figure) reaching rather beyond the short palm. Gnatho- 
pod 2 smaller; 5tk and 6*" joints subequal, with fascieles of setae along 
bind margin; sth joint ovate (in figure oblong), twice as long as broad; 
palm not defined, nearly transverse; finger stout, short, denticulate. Peraeo- 
pod 2 longer than peraeopod 1; finger in both long, slender. Uropod 3, 


‘- rami shorter than in uropods 1 and 2, lanceolate. Telson large, armed with 


a few short hairs. L. 7 mm. 
Port Jackson [East-Australia]. 


6. Gen. Dryopoides Stebb. 


1888 Dryopoides (Sp. un.: D. westwoodi), T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1145 | 1890 Dryapoides, Warburton in: Zool. Ree., v.25 Crust. p.19. 


Like Lembos (p. 594), except that the accessory flagellum of antenna 1 
is minute, and that the 2 rami of uropod 3 are rudimentary, pleon segment 6 
dorsally evanescent. 


1 species. 


1. D. westwoodi Stebb. 1888 D.w., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1146 t. 122 | 1889 D. w., J. Bonnier in: Bull. sei. France Belgique, v.20 p.391 | 
1893 D. w., A. Della Valle in: F. Fl. Neapel, v.20 p.425 | 1890 Dryapoides westwoodii, 
Warburton in: Zool. Rec., v.25 Crust. p.19. 


Back not much arched, pleon segment 4 as long as any preceding 
segment. Head, lateral lobes somewhat produced, marrowly rounded. Side- 
plates 1—5 not very deep; 1° produced forward, 24 deeper than broad, 
5th much broader than deep, nearly as deep as 4{h, Pleon segment 3, 
postero-lateral corners rounded. Eyes round, rather large, a little removed from 
lateral lobes of head. Antenna 1 as long as body, slender, 1° joint longer 
than head, 24 longer than 1%, 34 about '/, as long as 24; flagellum much longer 
than pedunele, about 30-jointed; accessory flagellum with 2 joints, 1° small, 
24 minute. Antenna 2 shorter, but with much longer peduncle, ultimate 
joint of peduncle longer than penultimate or than the 8-jointed flagellum. 
Gnathopod 1, 5th joint rather shorter than the oval 6tk, which has the palm 
in © scarcely distinet from hind margin, but in J apparently somewhat 


602 Dryopoides, Paradryope 


excavate; finger matching palm, with many decurrent teeth on its inner 
margin. Gnathopod 2 smaller, 5th joint as long as 6th, and distally a little 
wider, 6! narrowly oblong, palm transverse, very short, convex, just over- 
lapped by the short finger. Peraeopods 1 and 2 very glandular; 24 and 4th 
joints rather robust; finger more than half as long as 6% joint. Peraeo- 
pods 3—5, 24 joint oblong, not much expanded. Peraeopod 4 longer than 
peraeopod 3, and peraeopod 5 than peraeopod 4; finger in each with inner 
margin furred, produced into a blunt process carıying a plumose seta, 
which overlaps the apex. Uropods 1 and 2, peduncle longer than the rami, 
which in each are subequal, spinose, blunt. Uropod 3, peduncle short, broad, 
just reaching beyond the telson; the diminutive rami equal, narrowly oval, 
inner armed with 3 plumose spinules, outer with a longer apical spine and 
a spinule above it. Telson broader than long, its distal arch ending in a 


slightly produced blunt point; on each side not far from lateral margins 


there is a group of plumose setae. L. about 8 mm. 
Off Melbourne. Depth 62 m. 


7. Gen. Paradryope Stebb. 


1888 Paradryope (Sp. un.: P. orguion), T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1151 | 1893 Ischyrocerus (part.)?, A. Deila Valle in: F. Fl. Neapel, v.20 p.451. 


Pleon segment 6 dorsally well developed. Side-plates shallow. Antennae 1 
and 2 with peduncle elongate. Antenna 1, 3% joint of peduncle longer than 
24 or 1°, accessory flagellum small. Mandibular palp very elongate. Gnatho- 
pod 1 larger than gnathopod 2. Peraeopods 1—5, 24 joint little expanded; 
peraeopod 5 the longest. Uropods 1 and 2, outer ramus considerably shorter 
than inner. Uropod 3, rami almost rudimentary, outer a little longer than 
inner. Telson simple. - 


1 species. 


1. P. orguion Stebb. 1888 P.o., T. Stebbing in: Rep. Voy. Challenger, v. 29 
p. 1151 1.128. 


Back rather broadly rounded. Head, rostrum short, acute; lateral 
lobes acute, a little produced. Side-plates 1—4 little deeper than the 
following; 5tk and 6" apparently with an acute hind lobe. Pleon segment 3, 
postero-lateral eorners rounded. Eyes small, round, near the lateral lobes 
of head. Antennae 1 and 2 elongate. Antenna 1, 1° joint rather longer 
than head; 24 considerably longer than 1%, 34 a little longer than 24; 
flagellum shorter than peduncle, 8-jointed; accessory flagellum 1 slender 
joint. Antenna 2 rather longer, ultimate joint of peduncle a little longer 
than penultimate; flagellum 9-jointed. Gnathopod 1, 24 joint shorter and 
very much narrower than 6%; 5tk rather longer than broad, much shorter 
and narrower than the very large, oval 6%, of which the oblique palm is 
strongly sculptured, with eavities separating a small submedian process from 


the finger-hinge and from a large tooth, dentieulate on the edge which unites . 


with the hind margin of the joint, the dentate finger elosing over this edge 
against strong palmar spines. Gnathopod 2 smaller, but with longer 5th 
joint, which is as long as the 6t"; 6th oval, rather stout, palm not very 
oblique, eonvex, finely pectinate, finger slightly denticulate, elosely fitting 
palm. Peraeopods 1—5 not greatly differing in length; peraeopod 3 scarcely 
as long as 1% or 24, none of the joints much widened. Uropods 1 and 2, 


a EI I a EZ Ga a a Ma ee a Fa 
u -r 


Paradryope, Photidae __. 603 
‘outer ramus shorter than inner. Uropod 3, peduncle broad, reaching well 
beyond the telson, rami narrow, almost acute. Telson a little longer than 
broad, apex obtuse, a little produced; a spinule near centre of each Iateral 
margin. L. about 5 mm. 


North-Paeifie (lat. 36° N., long. 158° E.). Depth of 4200 m. 


34. Fam. Photidae 


1872 & 76 Photidae (part.), A. Boeck, Skand. Arkt. Amphip., v.1 p.74; v.2 
p.546 | 1882 P., 6. O.Sars in: Forh. Selsk. Christian., nr. 18 p.29 | 1888 P. (part.), 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.1061 | 1894 P. (part.), G. O. Sars, Crust. 
Norway, v.1 p. 538. 


Head, lateral lobes often slightly produced. Side-plates variable in 
depth and relative size, 24 not unfrequently the largest, 4" with hind margin 


‘ not excavate. Antenna 1: often subequal to antenna 2, sometimes longer; 


accessory flagellum varying from obsolete to long. Mouth-parts normal and 
in general as in the Aoridae (p. 585), but: mandibular processes of lower 
lip not acutely produced, 34 joint of mandibular palp usually not longer 
than 24, inner plate of maxilla 1 with a variable number of setae. Gnatho- 
pods 1 and 2 (Fig. 104, 105, 107; p. 610, 614) either subchelate or simple, 
but gnathopod 1 not the larger, and sexual difference chiefly affecting 
gnathopod 2. Peraeopods 1 and 2 (Fig. 106 p. 613) glandular. Peraeo- 
pods 4 and 5 longer than, the rest. Uropods 1 and 2 biramous. Uropod 3 
biramous except in ih aa (p. 604). Telson simple (Fig. 103 p. 607). 


Marine. 


10 genera, 38 accepted species and 5 doubtful. 


Synopsis of genera: 


‚J Uropod 3 with only Il ramus........ 1. Gen. Mieroprotopus . p. 604 
\ Uropod 3 with 2 rami — 2. 


Uropod 3 (Fig. 103) with one ramus much 
2 smaller than the other — 8. 
Uropod 3 with the rami not very unequal — 4. 


3 Gnathopods 1 and 2 subchelate ...... 2. Gen. Photis. . ... - p- 605 
Gnathopods 1 and 2 (Fig. 104, 105) simple . 3. Gen. Haplocheira . . p.609 
Antenna 1, 3d joint longer than 1st or sn 

4 to it — 5. 

Antenna 1, 3d joint shorter than 1st — 7. 
j Antenna 1, accessory flagellum well developed 4. Gen. Eurystheus . . p.610 

5 % Antenna l, accessory flagellum rudimentary or 

| obsolete — 6. 

6 { Gnathopod 2, 5th joint short... ..... 5. Gen. Podoceropsis. . p. 618 
Gnathopod 2, 5th joint long...» 2... 6. Gen. Megamphopus . p. 621 

+ [ Antenna 1, accessory flagellum obsolete. . . 7. Gen. Goösia. . - . - p- 622 
Antenna 1, accessory flagellum developed — 8. 


604 Photidae, Mieroprotopus 


8 Gnathopod 2 subehelate. . . ... 2... 8. Gen. Protomedeia . . p. 623 
Gnathopod 2 simple — 9. 


kha’Trank Ense a NE » 9. Gen. Xenocheira . . p. 624 


Gnathopod 2, 5th joint broadiy expanded to 
9 
| Gnathopod 2, 5th joint not broadly expanded . 10. Gen. Leptocheirus. . p. 625 


1. Gen. Microprotopus Norm. 


1852 Dercothoe (part.), J. D. Dana in: Amer. J. Sei., ser.2 v.14 p.313 | 1853 D. 
(part.), J. D. Dana in: U. S. expl. Exp., v. 1311 p. 911, 968 | 1867 Microprotopus (Sp. un.: 
M. maculatus), A. M. Norman in.: Rep. Brit. Ass., Meet. 36 p.197,203 | 1893 M., A. Della 
Valle in: F. Fl. Neapel, v.20 p.391 | 1894 M., G. O. Sars, Crust. Norway, v.1 p. 566 | 
1879 Orthopalame (Sp. un.: O. terschellingi), Hoek in: Tijdschr. Nederl. dierk. Ver., 
v.4 p. 123. 


Head, lateral lobes moderately produced, post-antennal corners well 
marked. Side-plates rather large, 5tt with deep front lobe. Antennae 1 
and 2 not very elongate, nor very unequal. Antenna 1 with accessory 
flagellum. Gnathopod 2 especially large in the d. Peraeopods 1 and 2, 
24 joint a little expanded. Peraeopods 3—5, 24 joint broadly oval.- Uropod 3 
' with a single ramus tipped with spines. Telson small. 


2 species accepted, 3 obscure. 


Synopsis of accepted species: 


Antenna 2, flagellum more than 3-jointed : ...... 1. M. maculatus. . p. 604 
Antenna 2, flagellum not more than 3-jointed . . .. . 2. M. longimanus . p.605 


1. M. maculatus Norm. 1867 M.m., A. M. Norman in: Rep. Brit. Ass., Meet. 36 
p: 203 | 1868 M. m., A. M. Norman in: Ann. nat. Hist., ser. 4 v.2 p.419 t.23 £.7—11| 
1874 M. m., T. Stebbing in: Ann. nat. Hist., ser.4 v.14 p.13 t.2 £.5 | 1876 M. m., A. 
Boeck, Skand. Arkt. Amphip., v.2 p.559 t.26 f.3 | 1889 M. m., Hoek in: Tijdschr. 
Nederl. dierk. Ver., ser.2 v.2 p. 224 | 1890 M. m., Chevreux in: Bull. Soc. zool. France, 
v.15 p. 148 f.2,4,6,7 | 1893 M. m., A. Della Valle in: F. Fl. Neapel, v.20 p. 393 t. 56 
f.13—16 | 1894 M. m., G. O. Sars, Crust. Norway, v.1 p.567 t.201 | 1898 M. m., Sowinski 
in: Möm. Soc. Kiew, v.15 p.470 | 1879 Orthopalame ''terschellingi, Hoek in: Tijdschr. 
Nederl. dierk. Ver., v.4 p.123 t.9 f.4—7. 


Body, dorsum broadly rounded. Side-plates 1—4 strongly setiferous, 
1° and 24 wider in J than in Q. Pleon segment 3, postero-lateral corners 
broadly rounded. Eyes round, small, dark. Antenna 1 about ’/, as long 
as body, 1° joint subequal to 24, nearly twice as long as 34; flagellum little 
longer than peduncle, 8—10-jointed; accessory flagellum with 2 joints, 
24 minute. Antenna 2 subequal to antenna 1, ultimate and penultimate joints 
of peduncle subequal, flagellum longer than ultimate joint of peduncle, 
5—7-jointed. Gnathopod 1 rather small, 5tk joint rather long and narrow, 
setose on hind margin, 6! joint about as long, narrowly oval, more widened 
distally in S than in ©, palm defined by an obtuse angle. Gmathopod 2 
in d, 34 joint longer than 4*h; 5th short, broad, eup-shaped; 6! very large 
and long, front convex, hind or palmar margin straight between a projecting 
basal and a distal tooth; between the latter and the finger-hinge is a cavity; 
finger very long, slightly sinuous, reaching basal tooth of 6th joint. Gnatho- 
pod 2 in © stouter than gnathopod 1; 4 joint longer than 5tk, the 4th 
and the cup-shaped 5tk joint being each produced into a strongly setose 
lobe; 6tk broader than in gnathopod 1 and palm more defined. Uropod 3, 
peduncle rather stout, ramus subequal to itin length, narrow, tipped with setules 


LE ER NE RUE 


‘ Mieroprotopus, Photis 605 
and 2 spines. Telson rather broader than long, distally truncate, with a 
little tooth at each corner carrying 2 unequal spines. Speer sometimes 
blackish with erowded dark spots. L. 3 mm. 


North-Atlantie with adjoining seas (Europe from Bergen in Norway to the 
Adriatie; Azores). Depth 4—20 m, on sandy bottom. 


£ 2. M. longimanus Chevreux 1886 &87 M. l., Chevreux in: Bull. Soc. zool. France, 
v.11 p.XLI; v.12 p.311 £.5; p.295 t.5 f.5—10 | 1890 M.|., ae, in: Bull. Soe. 
zool. France, v.15 p.148 f.1, 3,5 | 1893 M.l., A. Della Valle : FE. Fl. Neapel, v.20 
p.392 1.56 £.7—12 | 1894 Mil; G. ©. Sars, Crust. Norway, v.A p. 568 | 1890 M. macu- 
jatus (part.), J. Bonnier in: Bull. sci. France Belgique, v. 22 p: 173 t.8,9. 


Side-plates 1—4 not strongly setiferous, 24 in d rotundo-quadrate. 
Pleon segment 3, postero-lateral corners rotundo-quadrate. Eyes round, not 
very small, red. Antennae 1 and 2 equal, nearly as in M. maeulatus, 
but flagellum of antenna 1 only 5-jointed, 27 N of antenna 2 only 
#-jointed, scarcely as long as ultimate joint of peduncle. Gnathopod 1 
nearly as in M. maculatus. Gnathopod 2 in JS, 34 joint shorter than 4th, 
4th with simple setae on the produced rounded apex, 5tk cup-shaped, with 
long plumose setae on the hind lobe, 6! very large, subreetangular, front 
margin nearly straight, the opposite one, of which the chief part is palmar, 
armed according to age with 1—3 strong teeth, finger reaching the tooth 
nearest the base of the 6th joint. Gmathopod 2 in Q, 4 and 5tk joints 
broader apically than in JS, 6% much narrower than 5#t, long, tapering, 
smooth, carrying in front some long plumose setae; finger curved, much 
shorter than 6tk joint. Peraeopods and uropods differing little from those 
of M. maculatus. Telson apically rounded. Colour yellowish with transverse 
brown bands. L. 2 mm. 

North-Atlantie (Croisie [West-France], Pas-de-Calais). On algae (Rhodomela 
pinastroides Ag.) on rocks at low-tide, or rocky bottom. 


M. emissitius (Dana) 1852 Gammarus e., J. D. Dana in: P. Amer. Ac., v.2 
p.211 | 1853 & 55 Dercothoe e. (part.), J. D. Dana in: U. S. expl. Exp., v. 1311 p. 969; 
t.66 f.9a—e | 1862 Dercotho& (Cerapus) e., Dercothoe emistuis, Bate, Cat. Amphip. Brit. 
Mus., p.259 t.44 f.7 | 1893 Protomedeia maculata (part.), A. Della Valle in: F. Fl. 
Neapel, 0.20 p. 8387, 436. 

L. 8 mm. 


Sooloo Sea. Depth 12 m. 
M. hirsuticornis (Dana) 1852 Gammarus h., J.D. Dana in: P. Amer. Ac., 
v.2 p.210 | 1853 & 55 Dercothoe? h., J. D. Dana in: U. S. expl. Exp., v.13u p. 972; 


t.67 £.2 | 1862 Dercotho& (Cerapus) h., Bate, Cat. Amphip. Brit. Mus., p.260 t.44 f.9 | 
1893 Protomedeia maculata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 436. 


Bay of Rio Janeiro. 

M. minutus Sowinski 1894 M. m., Sowinski in: M&m. Soc. Kiew, 2.13 p. 329 
t.4 £.1—15 | 1898 M. m., Sowinski in: M&m. Soc. Kiew, v.15 p. 470. 

The description of this species could not be obtained. 


Sea of Azov. 


2. Gen. Photis Kıayer 


1842 Photis (Sp. un.: P, reinhardi), Kroyer in: Naturh. Tidsskr., v.4 p.155 | 1876 
P., A. Boeck, Skand. Arkt. Amphip., e.2 p.553 | 1888. P., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.1063 | 1893 P., A. Della Valle in: F. Fl. Neapel, v.20 p.394 | 1894 


606 ‘  Photis 


P., 6. O. Sars, Orust. Norway, v.1 p.568 | 1862 Eiscladus (Sp. un.: E. longicaudatus), 


Bate & Westwood, Brit. sess. Crust., v.1 p.411 | 1869 Heiscladus, A. M. Norman in: 


Rep. Brit, Ass., Meet.38 p.255, 259, 284 | 1874 Heiscladius, M’Intosh in: Ann. nat. 
Hist., ser. 4 v.14 p. 269. 


Body smooth. Head, lateral lobes somewhat produced. Side-plates 1—5- 
rather large, 5t" scarcely less deep than the preceding pairs. Eyes on lateral 
lobes of head. Antennae 1 and 2 subequal, peduncle elongate. Antenna 1 
with 34 joint subequal to 1°, a rudiment of accessory flagellum sometimes 
present. Mouth-parts as in Eurystheus (p. 610), except that 34 joint of 
mandibular palp is less elongate. Gmnathopods 1 and 2 stronger in J than 
in ©, 24 stronger than 1°, with short 5*t joint. Peraeopod 3 short, upturned, 
24 joint broad, finger.very short, clasped against apex of 6!" joint, and having 
a dentiele on its outer margin. Uropod 3 (Fig. 103), rami very unequal, 
the outer having 2 joints, 24 mimute; the inner ramus very small. Telson 
(Fig. 103) small, broader than long. 


5 species accepted, 1 obscure. 


Synopsis of accepted species: 


Lateral lobes of head little produced; uropod 3, 


1 outer ramus not longer than peduncle — 2. 
Lateral lobes of head much produced; uropod 3, 
outer ramus longer than peduncle — 4, 
9 Peraeopod 3, 24 joint widened distally . . .. . 1. P. brevicaudata . p. 606 
Peraeopod 3, 24 joint narrowed distally — 8. 
g Gnathopod 1, 6th joint longer than 5th. .... 2. P.reinhardi. . . p. 607 
Gnathopod 1, 6th joint not longer than 5th... . 3. P.macrocarpa . p.607 
4 { Body slender, side-plates not very deep. . . . . 4. P. longicaudata . p. 608 
Body stout, side-plates very deep. . ...... 5. P. tenuicornis. . p. 608 


1. P. brevicaudata Stebb. 1888 P.b., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1068 t.108 | 1893 P. reinhardi (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.395. 


Head, lateral lobes acute, little produced. Side-plates 1—5 very 
deep, 5tk scarcely less deep than 4th and much broader. Pleon segment 3, 
postero-lateral corners obtusely quadrate. Eyes small, round, dark, lenses 
numerous. Antenna 1, 34 joint intermediate in length between 1° and 
longer 24, flagellum shorter than pedunele, 7- or 8-jointed. Antenna 2, 
ultimate and penultimate joints of peduncle equal, flagellum 6-jointed. 
Gnathopod 1, 5t% joint stout, rather shorter than the oval 6%; palm finely 
pectinate, continuous with hind margin, only defined by the palmar spines; 
finger with 4 decurrent teeth. Gnathopod 2, 5th jomt as usual short, cup- 
shaped; 6tk broad, oblong oval, palm obliquely excavate, defined by a palmar 
spine at the well marked angle; finger dentate, matching palm. Peraeopods 1 
and 2 rather stout and setose; 6% joint not very slender, not 1'/, as long 
as 5th, Peraeopod 3, 24 joint as broad as long, widened distally; 5 joint 
rather longer than 4, Peraeopod 4, 24 joint as long, but not quite as 
broad as in peraeopod 3, remaining joints longer than in peraeopod 3. 
Peraeopod 5 little longer than peraeopod 4, 24 joint considerably narrower. 
Uropod 3, outer ramus rather shorter than peduncle, its 24 joint tipped with 
a long spine. Telson very short, much broader than long, apex rounded. 
L. less than 4 mm. 


Off Melbourne. Depth 60 m. 


\ Photis 607 


2. P. reinhardi Kreyer 1842 P.r., Kroyer in: Naturh. Tidsskr., v.4 p.155 | 
1876 P.r., A. Boeek, Skand. Arkt. Amphip., v2 p.554 1.26 f.1 | 1893 P.r. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p.395 | 1894 P.r., G. O. Sars, Crust. Norway, 
v.1 p.569 t.202 | 1866 Amphithoe r., Goes in: Ofv. Ak. Förh., v.22 p.532 | 1852 Amphi- 
tho& pygmaea, W. Liljeborg in: Öfv. Ak. Förh., 0.9 p.9 | ?1895 Photis pollex, A. O. 
Walker in: P. Liverp. biol. Soc., v.9 p. 312 t.19 f. 16—19. 


Body rather stout, with broadly vaulted back. Head, lateral lobes 
acute, not much produced, rounded below. Side-plates 1—5 setose on lower _ 
margin; 1° a little narrowed distally; 5% very large, distally obliquely rounded. 
Pleon segment 3, postero-lateral corners rounded. Eyes small, rounded, not 
elose to margin of head. Antennae 1 and 2 rather strong and setose. 
Antenna 1 about half as long as body; 34 joint longer than 1%, shorter 
than 24; flagellum shorter than pedunele, about 9-jointed. Antenna 2 a 
little shorter, ultimate and penultimate joints of peduncle subequal, flagellum 
shorter than peduncle, about 9-jointed. Gnathopod 1 in J robust, Stk joint 
distally widened, a little shorter than the broadly oblong oval 6%; palm 
nearly transverse, a little excavate, defined by an obtuse angle, finger matching 
palm, denticulate. Gnathopod 2 in d, 24 joint little produced at lower 
front corner, 5th broadly eup-shaped; 6th large, palm transverse, defined by 
a strong tooth, followed by a cavity and than by 2 tubereles near the finger- 
hinge; finger strong, matching palm. Gmnathopod 1 in © as in C, but rather 
smaller, palm not exeavate. Gnathopod 2 in oO as in Ö, but smaller, with 
sinuous palm defined by a projeeting angle with palmar spine. Peraeopods 1—5 
comparatively stout. Peraeopods 1 and 2 rather setose. Peraeopod 3, 24 joint 
as broad as long, narrowest distally. Peraeopods 4 and 5 nearly equal in 
length; 24 joint oblong oval, narrowing a little distally. Uropod 3, outer 
ramus scarcely so long as peduncle, its 24 joint tipped with a long spine. 
Telson rather broader than long, subtriangular, with small process on each 
side of apex. Colour greyish white, with bands of light brown. L. 5 mm. 

Aretie Ocean, North-Atlantie, North-Sea and Skagerrak (Greenland; Iceland; 
Norway, depth 37—94 m; ?Liverpool Bay, depth 4—19 m); Kattegat. 


3. P. macrocarpa Stebb. 1888 P. macrocarpus, T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.1064 t.107 | 1893 P. reinhardi (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 395. \ 


Head, lateral lobes as in P. reinhardi. Side-plates 1—5 not specially 
setose, 1° distally widened, 5tk with front lobe large but less deep than 
4!h, Pleon segment 3, postero-lateral corners obtusely quadrate. Eyes small, 
round, with very few lenses. Antennae 1 and 2 about ?/, 
as long as body. Antenna 1, 1% joint rather long, subequal 
to 34, shorter than 24; flagellum subequal to peduncle, 
14-jointed. Antenna 2, ultimate joint of peduncle shorter 
than penultimate; flagellum subequal to pedunele, 12-jointed. 
Gnathopod 1, 5th joint rather longer than the oval 6th, — pod3 
palm minutely pectinate, only defined by palmar spines, 
finger rather long -and broad, with 7 decurrent teeth. 

Gnathopod 2 in C, palm excavate, defined by a tooth i 

with palmar spine. Gnathopod 2 in ©, 5% joint stout, p, nd 
but longer than broad, 6tk broad, oblong oval; palm Wropod3sand telson. 
rather oblique, shorter than hind margin, a little overlapped 

by the dentate finger. Peraeopods 1 and 2, 4tk joint long, broad, setose 
in front, 6b about 1'/, as long as 5th; finger over half as long as 6% joint. 
Peraeopod 3, 24 joint rather longer than broad, much narrowed distally, 


608 Photis 


5th scarcely so long as 4{h or 6". Peraeopod 4 longer than peraeopod 3. 
Peraeopod 5 much longer than peraeopod 4; 24 joint rather narrowly oblong. 
Uropod 3 (Fig. 103), outer ramus about as long as peduncle, 24 joint tipped 
with a long straight spine. Telson (Fig. 103) about as broad as long, with 
setules on either side of the triangular apex. L. less than 4 mm. 


Southern Indian Ocean (Kerguelen Island). 


4. P. longieaudata (Bate & Westw.) 1862 Eiscladus longicaudatus, Bate & 
Westwood, Brit. sess. Crust., v.1 p.412 f. | 1869 Heiscladus l., A. M. Norman in: Rep. 
Brit. Ass., Meet. 38 p.284 | 1874 Heiscladius l., M’Intosh in: Ann. nat. Hist., ser. 4 v.14 
p.269 | 1877 Photis longicaudata, Meinert in: Naturh. Tidsskr., ser.3 v.11 p.142 | 1887 
P.1., Chevreux in: Bull. Soc. zool. France, v.12 p.311 | 1894 P.1, G.O.Sars, Crust. 
Norway, v.1 p.571 t.203 f.1 | 1895 P. longicaudatus, A. O. Walker in: Ann. nat. Hist., 
ser.6 v.15 p.471 | 1871 P. lütkeni, A. Boeck in: Forh. Selsk. Christian., 1870 p. 233 | 
1876 P.1., A. Boeck, Skand. Arkt. Amphip., ©.2 p.556 t.26 f.2 | 1898 P. reinhardi 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 395 t.3 £.3, t.10 f. 1—19. 


Body more slender than in P. reinhardi (p. 607) and side-plates less 
deep. Head, lateral lobes greatly projecting, narrowly rounded. Side-plate 5 
distally narrowly rounded. Pleon segment 3, postero-lateral corners rounded. 
Eyes very small, round, close to margin of lateral lobes of head. Antennae 1 
and 2 slender, not densely setose, subequal, more than half as long as body, 
flagellum 8- or 9-jointed. Antenna 2, antepenultimate joint of pedunele 
unusually narrow and elongate. Gnathopod 1, 5tk joint not greatly widened 
distally, about as long as 6", which widens to the oblique, obtuse-angled palm, 
Gnathopod 2 in JS, 24 joint produced into a rounded decurrent lobe at 
distal front corner; 5t" joint cup-shaped; 6 widening to the palm, which 
is defined by a projecting angle, being also somewhat excavated in the 
middle, and exhibiting, on either side of the excavation, a slight angular 
projeetion (Sars), deeply excavated and slightly ciliated (Bate). Peraeo- 
pods 1—5 much more slender than in P. reinhardi. Peraeopods 1 and 2, 
6th joint very narrow, nearly twice as long as 5tt. Peraeopod 5 conside- 
rably longer than the other peraeopods. Uropod 3, outer ramus longer than 
peduncle, 24 joint tipped only with 2 slender setae. Telson very small, 
shaped as in P. reinhardi. Colour whitish with light brown bands, flagella 
of antennae crimson. L. 9 scarcely over 4 mm (Sars), reaching 12 mm 
(Bate, Walker). 

North-Atlantie with adjoining seas (Norway, Denmark, Great Britain, France); 
Mediterranean (Naples). Depth 10—56 m. 


5. P. tenuicornis O. Sars 1882 P.t., G.O.Sars in: Forh. Selsk. Christian., 
or.18 p.110 1.6 £.4 | 1894 P.t., G.O.Sars, Crust. Norway, v.1 p.572 t.203 f.2 | 1893 
P. reinhardi (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 397. 


Body short, stout, back broadly rounded. Head, lateral corners well 
produced, narrowly rounded. Side-plates 1—5 large and deep, especially 
in 9; 1° rather narrowed distally; 5tk large, distally expanded. Pleon 
segment 3, postero-lateral corners subquadrate, slightly produced. Eyes very 
small, close to margin of lateral lobes of head. Antennae 1 and 2 equal, 
very slender, sparsely setose, about '/, as long as body. Antenna 1, 1* joint 
shorter than 24, a little longer than 34; flagellum nearly as long as "peduncle, 

5-jointed. Antenna 2, flagellum as long as ultimate and penultimate joints of 
peduncle, 5-jointed. Gnathopod 1 in d, 5th joint as long as 6th, distally 
widened; 6! oval, but with the oblique palm deeply excavate, defined by a 


Photis, Haplocheira 609 


projecting angle, to which the apex of finger reaches. Gnathopod 2 in d, 
24 joint with rounded lobe at lower front corner, 5tk joint broadly cup- 
shaped, 6! very large, palm oblique, much longer than hind margin, defined 
by a strongly projecting triangular lobe, minutely erenulate and bisinuate, 
with 2 angular projeetions, finger strong, impinging within the sinus adjacent 
‘to defining process. Gmathopod 1 in Q, 5% joint slender, longer than the 
oval 6, Gnathopod 2 in O stouter, 5tk joint short, cup-shaped, 6 stout, 
palm oblique, defined by an obtuse angle. Peraeopods 1—5 nearly as in 
P. longieaudata, but 5th less elongated. Uropod 3, outer ramus longer than 
peduncle, 24 joint tipped with slender setae. Telson extremely small, nearly 
twice as broad as long, with projection on each side of apex. Colour whitish 
grey, with slightly darker hue on side-plates. L. scarcely 4 mm. 


Aretie Ocean and North-Atlantie (Greenland; Norway, depth 56—75 m). 


P.producta (Stimps.) 1855 Dercothoe? productus, Stimpson in: P. Ace. Philad., 
©.7 p.882 | 1893 Photis reinhardi (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p.397. 


Gnathopods 1 and 2 subequal, 6th joint oblong. L. 16 mm. 
North-Paecifie (Tanegasima). 


3. Gen. Haplocheira Hasw. 


1879 Haplocheira (Sp. un.: H. typica), Haswell in: P. Linn. Soc. N. S. Wales, 
v.4 p.273 | 1885 H., Haswell in: P. Linn. Soc. N. S. Wales, v. 10 p.106 | 1888 H., 
T. Stebbing in: Rep. Voy. Challenger, v.29 p.1171 | 1881 Haplochira, E. v. Martens in: 
Z00l. Rec., v.16 Crust. p. 32. 


Head, lateral lobes not greatly produced. Side-plates of medium depth, 
öth less deep than 4th, 1st—4th with setae on lower margin. Antennae 1 
and 2 short, subequal, peduncle longer than flagellum. Antenna 1 with 
accessory flagellum. Upper lip faintly emarginate. Mandible, 34 joint of 
palp shorter than 24. Maxilla 1, inner plate with fringe of many setae, 
outer with 9 spines; 24 joint of palp long. Maxilla 2, inner plate fringed 
along inner margin. Maxillipeds, inner plates rather broad, outer narrow 
and rather short, palp elongate. Gnathopod 1 (Fig. 104 p. 610) simple or 
scarcely subchelate. Gnathopod 2 (Fig. 105 p. 610) simple, 5t and 6tk joints 
long and slender, fringed with very long setae. Peraeopods 3—5 robust, 
not elongate, 24 joint well expanded. Uropods 1—3 rather stout, spinose, 
peduncle produced to a long spine-like process. Uropod 3 short, peduncle 
stout, inner ramus minute, much shorter than outer. Telson with hook at 
each distal angle. 


1 species. 


1. H. barbimana (G. M. Thoms.) 1879 Gammarus barbimanus, G. M. Thomson 
in: Tr. N. Zealand Inst., v. 11 p.241 t.10D f.1 | 1886 Corophium barbimanum, G.M. . 
Thomson & Chilton in: Tr. N. Zealand Inst., v.18 p.143 | 1893 Leptocheirus barbimanus, 
A. Della Valle in: F. Fl. Neapel, v.20 p.433 t.57 f.4,5 | 1879 Haplocheira typica, 
Haswell in: P. Linn. Soc. N.S. Wales, 0.4 p.273 t.11 f.2 | 1885 H.t., Haswell in: P. 
Linn, Soc. N.S. Wales, e.10 p.106 t.16 f.4—8 | 1884 Corophium lendenfeldi, Chilton 
in: Tr. N. Zealand Inst., v.16 p.262 t.20 f.la—e | 1888 Haplocheira plumosa + H. bar- 
bimanus, T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1172 t. 126; p. 1177. 


Body not much compressed laterally. Head, lateral lobes rounded or 
pointed. Pleon segment 3, postero-lateral corners obtusely quadrate. Eyes 
oval. Antenna 1, 1° and 24 joints subequal, 34 rather over half as long 
as 24; flagellum 9—12-jointed; accessory flagellum 2—5-jointed. Antenna 2 

Das Tierreich. 21. Lief.: T.R. R. Stebbing, Amphipoda I. 39 


610 Haplocheira, Eurystheus 


stouter, ultimate joint of peduncle rather shorter than penultimate, flagellum 
not longer than ultimate, with 4—6 joints, last tipped with curved spines. 
Gnathopod 1 (Fig. 104), 4! joint very short, with setae on hind margin; 
5th stouter than 6tk, about ?/, as long, densely setose on hind margin; 6 
slender, tapering, with long setae on both margins, palm practically wanting; 
finger with a subapical tooth. Gnathopod 2 (Fig. 105) much like gnatho- 
pod 1, but 5tk joint as long 
as the narrow tapering 6%, 
both fringed on hind margin 
with double row of very elon- 
gate plumose setae; finger 
short, with subapical tooth. 
Peraeopod 3, 24 joint with a 
bulge at the proximal hind 
corner. Peraeopod5, 24joint 
widened distally. Uropods 1 
and 2, rami not very un- 
equal, those of uropod 2 the 
stouter; in all the spines are strong. Uropod 3, the outer ramus scarcely as 
long as peduncle, inner very small. Telson with sides more or less converging 
to the rather broad, almost transverse apex, with 2 spinules and a setule on 
the surface near each apical tooth. Colour greyish. L. 5—6 mm. 


South-Paeifie (Lyttelton Harbour [New Zealand]; Port Jackson [East-Australia], 
under stones at low-water mark); southern Indian Ocean (Kerguelen Island, depth 222 m). 


5% joint —- 4 


Fig. 104 &105. H. barbimana. 
Gnathopods 1 and 2. 


4. Gen. Eurystheus Bate 


1855 [Subgen.] Gammaropsis (part.), W. Liljeborg in: Vetensk. Ak. Handl., 1853 
p. 455 | 1861 @., A. Boeck in: Forh. Skand. Naturf., Mede 8 p.659 | 1876 @., A. Boeck, 
Skand. Arkt. Amphip., v.2 p.580 | 1888 @., T. Stebbing in: Rep. Voy. Challenger, v.29 
p. 1092 | 1894 @., G. O. Sars, Crust. Norway, v.1 p.557 | 1856 Eurystheus (nom. nud.), 
Bate in: Rep. Brit. Ass., Meet.25 p.58 | 1857 E. (Sp. un.: E. tridentatus), Bate in: 
Ann. nat. Hist., ser.2 v.19 p.143 | 1859 Autonoe (part.), R. M. Bruzelius in: Svenska 
Ak. Handl., n. ser. v.3 nr.1 p.23 | 1873 Eurytheus, A. Marschall, Nomencel. zool., 
p-409 | 1884 Paranaenia, Chilton in: Tr. N. Zealand Inst., 0.16 p.258 | 1898 Maeroides 
(Sp. un.: M. thompsoni), A. O. Walker in: P. Liverp. biol. Soc., v.12 p. 282. 


Body slender. Head, lateral lobes projecting. Side-plates of moderate 
size, 24—4th yarying in relative depth, 4th not emarginate behind, 5tk with 
deep front lobe. Eyes, when present, well developed, often rather large. 
Antennae 1 and 2 slender, nearly equal, with slender setae. Antenna 1, 
34 joint elongate, accessory flagellum always distinet, usually of several joints. 
Upper lip more or less produced in front, distal margin a little insinuate 
or rounded. Mandibular palp very large, 34 joint lamellar, strongly setose. 
Maxilla 1, inner plate distinet, its setae varying from 1 to 11, outer plate 
with 10 spines; 24 joint of palp elongate. Maxilla 2, inner plate with inner 
margin fringed. Gnathopods 1 and 2 subchelate (Fig. 107 p. 614), 24 stronger 
in 5 than in Q, and usually with some variation in shape. Peraeopods 1 
and 2 (Fig. 106 p. 613), 24 and 4tk joints sometimes a little widened. 
Peraeopod 4 longer than peraeopod 3, peraeopod 5 longer than peraeopod 4; 
24 joint in all somewhat expanded. Uropod 2 shorter than uropod 1, uropod 3 
shorter than uropod 2. Telson not elongate. 


13 species. 


RENTE gie EEE ee a a Bee 
Br, a a EN ei ger, er TE 2 
RG IT 5 e . r ; 


Eurystheus 61l 


Synopsis of species: 
1 ! Eyes lageniform or oblong — 2. 


Eyes not lageniform or oblong — 3. . 
9 es A a ale A Be Er 1. E. atlanticus . . p.611 
ne Re Pe ST En 2. Bu afer 2.5 p- 612 
3 Pleon segment 4 dorsally dentate — 4. 
Pleon segment 4 not dorsally dentate — 7. 
4 S Telson emarginate . . . . nee 3. E. thompsoni . . p.612 
Telson not emarginate — 5. 
5 Pleon segment 4 with 1 medio-dorsal tooth — 6. 
Pleon segment 4 with 3 medio-dorsal teeth 4. E. crassipes . . p.612 
6 Gnathopod 2 in Q, palm without defining tooth. 5. E,thomsoni . . p.613 
Gnathopod 2 in 2, palm with defining teeth .. 6. E. ostroumowi . p.614 
7 


- | Gnathopod 2 in S, 2d joint greatly expanded. . 7. E. exsertipes . . p.614 


Gnathopod 2in d, 24 joint not greatly expanded — 8. 


Limbs of peraeon thickly coated with setae and 

a net 8. E.hirsutus . . . p.615 
Limbs of peraeon not thickly coated with setae 

and fine hairs — 9. 


: | 
| Side-plate 3 in & subacutely produced forward. 9. E. dentifer . . . p.615 


9 2 Side-plate 3 in $ not subacutely produced for- 


ward — 10. 
Gnathopod 2 in d, finger elosing on to the sur- 
face of 6th joint — 11. 
Gnathopod 2 in d, finger elosing on to the margin 
of 6th joint — 12. 
1 Gnathopod 2 in d, 6th joint narrow, finger short. 10. E.longimanus . p.616 
Gnathopod 2 in d, 6th joint broad, finger long. 11. E.palmatus. . . p.616 


19 Telson apically emarginate . . . ... 2... 12. E.chiltoni . . . p.617 
Talson not amarginsie 2". eier 13. E. maculatus . . p.617 


10 


1. E. atlanticus ($tebb.) 1888 Gammaropsis atlantica, T. Stebbing in: Rep. 
Voy. Challenger, v.29 p.1101 t.114 | 1893 Protomedeia? a., A. Della Valle in: F. Fl. 
Neapel. v.20 p.441. 


Q. Head, lateral lobes narrow, acute, strongly produced. Side-plate 1 
rather produced forward, but obtusely; 24 broader than deep. Pleon segment 3, 
postero-lateral corners rounded. Eyes lageniform, close to margin of head, 
the narrow neck uppermost. “Antenna 1, 34 joint subequal to 1°, shorter than 
24; flagellum 17-jointed, accessory flagellum 6-jointed. Antenna 2, ante- 
penultimate joint of peduncle a little concave above as if to receive lateral 
lobe of head; ultimate and penultimate joints subequal, flagellum 10-jointed. 
Gnathopod 1, 5tk joint rather shorter and narrower than 6tk; 6tk oblong 
oval, palm oblique, slightly defined, longer than hind margin, slightly over- 
lapped by the finger. Gnathopod 2 much larger; 5t" joint much shorter than 
6th, cup-shaped; 6" oblong, palm slightly oblique, irregularly convex, crenate, 
defined by a tooth, which is overlapped by apex of serrulate finger. Peraeo- 
pods 3—5, 24 joint well expanded, narrowing distally; finger short. Uropod 3, 
pedunele a little longer than the rami. Telson a little longer than broad, 
with triangular apex, a plumose setule at the angles of its base and a spine 
on the surface near each angle. Colour, dark stellate markings over much 
of the surface, including the mouth-parts. L. 7 mm. — GS unknown. 


Tropical Atlantie (St. Vincent [Cape Verde Islands]). 
39* 


612 Kurystheus 


2. E. afer (Stebb.) 1888 Gammaropsis afra, T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1097 t.113 | 1893 Protomedeia? a. (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p. 440. 3 E 


.. Head, lateral lobes narrow, acute, moderately produced. Side- 
plate 1 not produced forward. .Pleon segment 3, postere-lateral corners 
slightly rounded. Eyes oblong, vertical, elose to margin of head. Antenna 1, 
24 joint much longer than 1° or 39; accessory flagellum 6-jointed. Antenna 8, 
ultimate joint of pedunele rather longer than penultimate; flagellum 13-jointed. 
Upper lip smoothly rounded. Gnathopod 1, 24 joint with a distal widening; 
5th joint nearly as long and distally nearly as broad as 6th; 6th oblong 
oval, palm slightly oblique, shorter than hind margin, finger serrulate, matching 
palm. Gnathopod 2, 5tk joint short, cup-shaped, 6tk rather broadly oval, with 
palm oblique, very sinuous, defined by a simple angle, finger elosing against a 
palmar tooth on the surface. Peraeopods1 and 2, 4 joint much longer than 5th, 
Peraeopod 3, 24 joint-above almost as broad as the length, narrowing distally. 
Peraeopod 5, 24 joint not much expanded, but broader above than below; 
finger short. Uropod 3, pedunele rather longer than the short rami, inner 
a little shorter than the outer. Telson scarcely longer than broad, with some 
plumose setules on lateral margins and a spine at each angle of base of 
triangular apex. L. 7 mm. — S unknown. 


Southern Indian Ocean (Cape Agulhas [South-Afriea]). Depth 270 m. 


3. E. thompsoni (A. Walker) 1898 Maeroides t., A.O. Walker in: P. Liverp. 
biol. Soe., v.12 p.283 t.16 f.3—6 | 1899 Gammaropsis t., T. Stebbing in: Ann. nat. 
Hist., ser. 7 v.3 p. 350. 

9 unknown. — d. Pleon segments 4 and 5 each with 2 dorsal teeth 
on hind margin, a setule at base of each tooth. Head, lateral lobes acute. 
Side-plates of average depth.. Pleon segment 3, postero-lateral eorners produced 
to a small tooth, margin above bulging. Eyes large, long oval, dark, entering 
lateral lobes of head. Antennae 1 and 2 about half as long as body. Antennal, 
1° joint little more than half as long as 24, as long as 34; flagellum subequal 
to peduncle; accessory flagellum 7-jointed. Antenna 2, ultimate joint of peduncle 
longer than penultimate; flagellum subequal to pedunele. Gnathopod 1, 5% joint 
as long as 24, longer than the oval, setose 6!" Gmathopod 2 very power- 
ful; 5tk joint as broad as long, cup-shaped, 6th large, oblong, palm scarcely 
oblique, defined by an angular prominence, and having 3 submedian double 
tooth and another larger one near the hinge of the finger, across which it projects 
a pointed lobe on the outer surface; 5! and 6th joints both setose on hind 
margin; finger (in figure) strong, a little overlapping the palm. Peraeopods 
strong, 4" and 5th described as equal; 24 joint broad at base, distally narrowing, 
hind margin slightly serrate. Uropods 1—3 extending back the same distance. 
Uropod 3, peduncle nearly as long as the equal spinose rami. Telson widely 
but not deeply cleft, a spine and a seta at the end of each division, figured 
only in lateral view. Colour yellowish with grey dorsal freckles and darker 
spots on 24 joint of peraeopods. L. 10 mm. 


Puget Sound. 


4. E. crassipes (Hasw.) 1880 Moera e., Haswell in: P. Lmn. Soe. N. S. Wales, 
v.5 p.103 t.7 f.2 | 1899 Gammaropsis c., T. Stebbing in: Ann. nat. Hist., ser. 7 ©.3 
p. 850 | 1893 Ceradocus fasciatus (part.)?, A. Della Valle in: F. Fl. Neapel, 0.20 p.723. 
Pleon segment 4 with 3 small distant teeth on hind dorsal margin. 
Head, lateral corners not acute. Side-plates all small, 6% Jike 5%, scarcely 
smaller. Pleon segment 3, postero-lateral eorners quadrate, not acute. Eyes 


Eurystheus 613 


blackish or brownish in spirit, not large. Antennae 1 and 2 subequal, fringed 
with long slender setae. Antenna 1, 3% joint longer than 1°, nearly equal 
to 24, flagellum shorter than pedunele, about 20-jointed; accessory flagellum 
7—10-jointed. Antenna 2, ultimate and penultimate joints of peduncle 
subequal; flagellum shorter than pedunele, 18—24-jointed. Upper lip acutely 
produced in front. Mandible, spines of spine-row numerous. Maxilla 1, 
inner plate fringed with setae. Gmathopod 1 in JS, 5tk joint longer but 
rather narrower than 6%; 6th widest where palm joins hind margin with 
strong, scarcely interrupted convexity; finger slightly overlapping palm. Gnatho- 
pod 1 in oO, 6! joint not wider than 5%, Gmnathopod 2 in J, 4 joint 
small, quadrate, 5tk small, cup-shaped, very short, 6! very large, widening 
to the nearly transverse palm, defined by a strong tooth, near to which is 
another conspieuous tooth of variable size, followed by a 24 cavity and a 
squarish prominence; finger massive, closing down between the 2 teeth, and 
having on its inner margin a prominence not nearly large enough to fill 
‚the 24 cavity of palm, and a bulge near the hinge. Sometimes one of the 
gnathopods 2 is much smaller than the other, and has tbe 5tk joint relatively 
larger, the 6* with less prominently sculptured palm as in the ©. Peraeo- 
pods 1—3 short. Peraeopods 3—5, finger short, stout, much ceurved. Peraeo- 
pod 3, 24 joint oval, narrowed a little distally. Peraeopod 4 much longer 
than the preceding peraeopods, stout; 4—6t joints widening with age, 24 
relatively narrow, little longer than 4" or 6, oblong, but with hind margin 
convex above and below the concave middle part. Peraeopod 5 subequal to 
4th in length, less broad, 24 joint oblong, sinuous hind margin serrate, 
produced subacutely downward. Branchial vesicles narrow at base, broadly 
rounded distally. Uropod 3 short, the subequal rami nearly as long as 
pedunele. Telson small, as broad as long, apical border with an acute 
central projection, a spine on each of the pair of subapical, sublateral 
elevations. L. 8 mm. 


Port Jackson and Jervis Bay [East-Australia]. 


5. E. thomsoni (Stebb.) 1888 Gammaropsis t., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.1103 t.115 | 1893 Protomedeia? afıra (part.), 


A. Della Valle in: F. Fl. Neapel, v.20 p. 440. (\ = 


9. Pleon segments 4 and 5 with medio-dorsal 
emargination, 4% with a small tooth in centre of 
emargination. Head, lateral lobes narrow, subangular. 
Side-plate 1 a little produced forward, obtusely, 24 much 
larger, about as broad as deep. Pleon segment 3, 
postero-lateral corners forming a slightly upturned tooth, 
hind margin bulging above. Eyes rather large, close 
to margin of head. Antennae 1 and 2 broken. Upper 
lip slightly and unsymmetrically bilobed. Gnathopod 1, 
5th joint longer than 6tk, spinose behind; 6 spinose 
on both sides, oval, more convex behind than in 
front; palm finely pectinate, slightly defined; finger 
long, serrate, celosely fitting the palm. Gnathopod 2, 
24 joint not expanded, 5th triangular, cup-shaped; 
6% Jarge, widening to the palm, which is long, oblique, 
denticulate, 2 of the teeth prominent, the defining angle obtuse, carrying 
palmar spines, finger almost smooth, mätching the palm. Peraeopods 1 
and 2 (Fig. 106) glandular, of the usual pattern. Peraeopods 3—5, 24 joint 


Fig. 106. E. thomsoni, 2. 
Peraeopod 2. 


Ba a N a N 7 
a 


614 Eurystheus 


a sort of oblong oval, narrowed distally, hind margin rather sinuous in peraeo- 
pods 4 and 5; finger short. Uropod 3, peduncle as long as the equal rami. 
Telson little longer than broad, almost round, with a spine at each apical 
angle. L. 6 mm. 


South-Pacifice (east of New Zealand). Depth 2000 m? 


6. E. ostroumowi (Sowinski) 1898 Protomedeia o., Sowiuski in: M&m. Soc. Kiew, 
v.15 p.475 t.10 £. 1—19. 

Pleon segments 4 and 5 each with 1 dorsal tooth, preceded by a 
spinule or setule (hind margin of segment 5 in figure emarginate between 
2 teeth?). Head, lateral lobes outdrawn to a small acute point. Side- 
plate 1 with 2 little teeth on lower margin, 24—4th with denticle at lower 
hind corner. Pleon segment 3, postero-lateral corner acute, slightly upturned, 
with small sinus above. Eyes large, reniform, almost filling the lateral lobes of 
head. Antenna 1, 1% and 34 joints equal in length, shorter than 24; flagellum 
subequal to 24 and 34 joints combined, 9-jointed; accessory flagellum 4-jointed. 
Antenna 2 about as long as antennal, ultimate joint of peduncle a little shorter 
than penultimate; flagellum a little longer than penultimate joint, 9-jointed. 
Mandible, 24 and 34 joints of palp equal. Maxilla 1, inner plate fringed with 
numerous setae. Maxilla 2 and maxillipeds normal. Gnathopod 1 as in E.thom- 
soni (p. 613). Gmnathopod 2 in © nearly as in E. thomsoni, but 6% joint 
scarcely widening to palm, which is defined by a small tooth. Gmathopod 2 
in d, 6th joint very large, widening to palm, scarcely longer than broad, 
palm defined by a strong tooth, and having a median sinus between two 
denticulate slopes, finger strong, matching palm, which is subjeet to some 
variations. Peraeopods 1 and 2, none of the joints speeially robust. _Perae- 
opod 3, 24 joint oblong oval. Peraeopod 4, 24 joint much larger than in 
peraeopod 3 but of the same shape, 4! (in G only) monstrously expanded 
behind so as to resemble a 24 joint rather than a 4", nearly as broad as 
long, narrowed distally, almost as large as the 24 joint, but differently 


shaped. Uropod 3, peduncle as long as outer ramus, which is rather shorter 


than inner. Telson as in E. thomsoni. L. a little under 11 mm. 
Bosphorus. Down to 85 m. 


7. E. exsertipes (Stebb.) 1888 Gammaropsis e., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.1093 t.112 | 1893 Protomedeia e., A. Della Valle in: F. Fl. Neapel, 
v.20 p.440 1.57 £.12. 

Head, lateral lobes narrow, acute. Side-plate 1 
rounded in front, produced a little forward; 24 in 9 
broader than deep, 5tk nearly as deep as 4th- Pleon 
segment3, postero-lateral corners rounded. Eyes small, 
subrotund. Antenna 1 as long as the body, 1° joint 
as long as the head, 24 much longer, 34 intermediate; 
flagellum rather shorter than peduncle, 17-jointed; 
accessory flagellum with 4 slender joints. Antenna 2 
rather shorter, ultimate joint of peduncle a little shorter 
than the elongate penultimate, flagellum about half 
as long as peduncle, 12-jointed. Upper lip faintly 


Fig. 107. 


ee emarginate. Gmnathopod 1, 5! joint a little shorter 


than 24, a little longer than 6tk, 6th narrowly oval, 
front with spines in rows, hind margin and palm a continuous convexity, 
palm finely pectinate, finger serrate, in d even longer than the 6% joint. 


re SE a ee Pe BE sel er ae 
a SE a ERIEnT 


Eurystheus 615 


‘Gnathopod 2 in G (Fig. 107) little longer but much broader than gnathopod 1; 
24 joint attached close to lower margin of side-plate, widely expanded, some- 
what narrowed distally; 5t% short, cup-shaped; 6th Jarge, longer than broad, 
widening to the oblique palm, which is defined by a pretty strong tooth, whence 
it has a straight slope till near the finger-hinge; finger serrate, strongly curved, 
.closing on to the surface without reaching defining tooth of palm. Gnatho- 
pod 2 in 9, 24 joint broad, but not abnormally so, palm defined by a small 
acute tooth, the oblique margin finely pectinate, not irregular. Peraeopods 1 
and 2 not very stout. Peraeopods 3—5, 24 joint not greatly expanded, narrowed 
‚distally ; peraeopod 5 the longest. Uropod 1, pedunele longer than rami. Uropod 2, 
rami very unequal, peduncle longer than the outer, scarcely so long as the inner. 
Uropod 3, pedunele longer than the narrow subequal rami. Telson shorter 
than peduncle of uropod 3, longer than broad, subtriangular, with a spine 
near centre of each side, the margin below on each side furry with scale- 
like spinules. L. 10 mm. 


Southern Indian Ocean (Kerguelen Island). 


8. E. hirsutus Giles 1887 E.h., G.M.Giles in: J. Asiat. Soc. Bengal, v. 56 
p-227 t.8 | 1888 Gammaropsis h., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1643 | 
1893 Protomedeia maculata (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 439. 


Pleon segment 3 dorsally longer than any other segment. Head, lateral 
’lobes blunt. Side-plates all (in figure) exceedingly shallow, 5t—7th almost 
transversely linear (not mentioned in text). Eyes rather small, red brown. 
Antenna 1 rather more than !/, as long as body; 34 joint (in figure) scarcely 
‚so long: as 1°, 24 longer than 1°; flagellum shorter than pedunele, 11-jointed; 
accessory flagellum with 4 short joints. Antenna 2 a little shorter, ultimate 
‚joint of peduncle slightly shorter than penultimate, slightly longer than the 
7-jointed flagellum. Gmnathopod 1, 6! joint oval, nearly as long as 5th; 
finger weakly serrate. Gnathopod 2, 24 joint not expanded, 5tk cup-shaped, 
6th rather broadly oval, palm oblique, defined by a little tooth and having 
a small median one; finger feebly serrate, curved. Peraeopods 1 and 2, 
24 joint a little expanded, narrowly oval; peraeopod 1 rather the longer and 
stouter. Peraeopods 3—5, 24 joint greatly expanded; peraeopod 5 the longest, 
4! much longer than 34. Uropod 3 very short, rami not much longer 
‘than peduncle. Telson a short compressed lamina armed with a number of 
‚short tooth-like spines like those on the uropods. Colour, nearly transparent 
with a few patches of reddish brown. L. 4 mm. 


Bay of Bengal. Surface. 


9. E. dentifer (Hasw.) 1879 Moera dentifera, Haswell in: P. Linn. Soc. N. S. 
Wales, v.4 p.332 t.20 f.4 | 1884 Paranaenia typica + P.d., Chilton in: Tr. N. Zealand 
Inst., ©. 16 p.259 t.19 f.1 (S juv.?); p.260 t.21 f.2 | 1893 P.d. (part.), Protomedeia 
-(part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 441 | 1899 Gammaropsis d., T. Stebbing 
in: Ann. nat. Hist., ser.7 v.3 p.350. 


Head, lateral corners acute. Side-plate 3 in J produced forward rather 
:acutely under the 24, the long lower margin having a series of elliptical 
markings or pellueid spaces. Pleon segment 3, postero-lateral corners quadrate 
with minutely produced point. Antenna 1, 3% joint equal to 1, shorter than 24; 
‘flagellum shorter than peduncle, reaching 13 joints; accessory flagellum with 
5 or 6 long joints. Antenna 2, ultimate and penultimate joints of peduncle 
‚subequal; flagellum 13-jointed. Gnathopod 1 small, 5tk joint rather longer 


616 Eurystheus 


than 6th; 6th widest at base, which is straight, palm slightly distinguished 


from serrate hind margin; finger overlapping palm. Gnathopod 2 ind, 


29 joint channelled in front, each front margin ending in a rounded lobe; 
4th gubacutely produced behind the short cup-shaped 5th; 6th very large, 
widening to the palm, which is very oblique, nearly straight, bordered by 
several faseieles of long setae, and defined by a long tooth; finger long, 
strongly curved, dilated at base. Gnathopod 2 in Q with 5tk joint longer 


than in d, palm of 6% ill-defined (Chilton, in figure). Peraeopods 1—5 of 


the usual relative lengths, none robust; 24 joint in peraeopods 3—5 but 
little dilated. Uropod 3, rami longer than peduncle, inner slightly the longer. 
Telson very small, truncate, each of the subapical projeetions carrying a spine.. 
Colour light olive with minute black dots. L.5 mm. 


South-Pacifie (Port Jackson [East-Australia]; Lyttelton Harbour [New Zealand]).. 


10. E. longimanus (Chilton) 1884 Paranaenia l., Chilton in: Tr. N. Zealand. 
Inst., v:16 p.261 t.20 f.2a—c | 1899 G@ammaropsis I., 'T. Stebbing in: Ann. nat. Hist., 
ser.7 v.3 p. 350 | 1898 Paranaenia dentifera (part.), Protomedeia (part.)?. A. Della Valle 
in: F. Fl. Neapel, v.20 p.441. 


Side-plates normal, 3% not produced forward as in | of E. dentifer 
(p: 615). Gmathopod 1 in JS, 4 joint ending distally in an acute point; 
5th considerably longer than 6%, thiekly fringed with setae, chiefly in short. 
transverse rows, 6'" not broader than 5t", tufts of setae on both sides, palm 
slightly coneave, defined by a short stout spine; finger much longer than 
palm, slightly curved, acute. Gnathopod 2 in d, 4 joint distally acutely 
produced, 5% triangular, more than half as long as 6*"; 6 not wider than 5th, 
rectangular, twice as long as broad, with 3 rows of setae in tufts, palm 


transverse, rounded off; finger short, eurved, impinging on lateral surface of 


6'h joint. Gnathopod 1 in ©, palm slightly convex, not defined. Gnatho-- 
pod 2 in © smaller than that of J, palm slightly concave. Uropod 3, rami: 
only slightly longer than peduncle. L. 5 mm. 


Lyttelton Harbour |New Zealand]. 


11. E. palmatus (Stebb. & D. Roberts.) 1891 Podoceropsis p., T. Stebbing’ 
& D. Robertson in: Tr. zool. Soc. London, v.131 p.36 t.6 | 1899 Gammaropsis palmata,. 
T. Stebbing in: Ann. nat. Hist., ser.7 v.3 p.850 | 1898 Podoceropsis megacheir (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p.453 t.57 f.23, 24 | 1898 P, m., Sowinski in: 
Möm. Soc. Kiew, v.15 p.466 t.9 f.1—8 | 1894 Gammaropsis nana, P. palmata?, G.O. 
Sars, Crust. Norway, v.1 p.561 1.199 f.2; p.562 | 1895 @.n., A.O. Walker in: P.. 
Liverp. biol. Soe., v.9 p.8311. 


Body moderately slender. Head, lateral lobes acutely produced. Side- 
plates 1—5 rather deep; 5t" with front lobe nearly as deep as 4". Pleon 
segment 3, postero-lateral corners obtusely quadrate. Eyes dark brown, rounded 
(Sars), oval (Walker). Antenna 1 less than half as long as body, 34 joint 
a little longer than 1°, 24 longer than 34; flagellum shorter than peduncle,. 
with 5 or 6 joints; accessory flagellum with 2 or 3 joints, the last minute. 
Antenna 2 a little shorter, ultimate and penultimate joints of peduncle subequal;. 


flagellum about half as long as peduncle, 5-jointed (Sars, in figure). Upper: | 


lip but slightly produced in front. Gnathopod 1, 5" and 6tk joints subequal, 
5th fully as long as 6tk or somewhat shorter, 6 with palm more or less deeply 
excavate, triangular oval, finger with minute setules and a dentiele or perfectly 


smooth. Gnathopod 2 in C, 24 joint not expanded, 5t" ceup-shaped, 6tk broadly - 


Er FE 
er 
Ei Ei. “ 


en. 6 ze ee ee a 


Eurystheus 617 


oblong, palm nearly transverse, but strongly rounded at the angle or bisinuate; 
finger strongly eurved, much longer than the palm, elosing against inner 
surface of 6 joint. Gnathopod 2 in O little stronger than gnathopod 1, 
6" joint longer than 5#", oblong oval, not broad, palm defined by a distinet 
angle, its margin minutely but irregularly crenulate, finger a little overlapping 
the defining angle. Peraeopods 1 and 2, 24 joint a little widened, narrowly 
oval. Peraeopod 3, 24 joint wide proximally, narrowing distally. Peraeopod 4 
longer, 24 joint longer but narrower. Peraeopod 5 similar to peraeopod 4, 
but of larger dimensions. Uropod 3, pedunele longer than the equal, acute 
rami. Telson small, as broad as long, apical margin slightly concave with 
a couple of spinules on surface ridge at each side. Colour whitish with 
light brown transverse bands (Sars). L. Q scarcely exceeding 3, d 4 mm. 


Firth of Clyde; Christianiafjord, depth 38 m; Bosphorus, depth 36 m. 


19. 2 chiltomi (@: M. Thoms) 1897: ‚Maere c., ©... Thomson in: Ann. net 
Hist., ser. 6 0.20 p.447 t.10 f.1—5 | 1899 Gammaropsis e., T. Stebbing in: Ann. nat. 
Hist., ser.7 v.3 p. 350. 


Body slender, rather compressed. Head, lateral lobes produced into 
an obtusely pointed process. Side-plate 1 elongated, widening and rounded 
below, produced forward at their infero-anterior angle. Eyes subreniform, 
broader below than above, elose to margin of lateral lobes of head. Antenna 1, 
18 joint stout, 24 about twice as long as 1°, 34 about ?/, as long as 24; flagellum 
unknown; accessory flagellum nearly as long as ultimate joint of peduncle. 
Antenna 2, pedunele subequal to pedunele of antenna 1, ultimate and pen- 
ultimate joints of pedunele subequal; flagellum slightly longer than ultimate joint. 
Mandibular palp, 24 and 34 joints widening distally, 24 longer than 34, 34 with 
long setae on broad apex. Maxilla 1, inner plate short, acute, without setae, 
outer with 10 spines, palp apparently 3-jointed, the middle joint short (P). 
Maxilla 2, inner plate fringed with short setae, chiefly round the inner 
margin. Maxillipeds normal, 4% joint of palp short- and rounded, with stout 
apical setae, but without a elaw. Gmnathopod 1 small, 4! joint produced 
into an acute tip (in figure rotundo-quadrate at apex); 5th long, widening 
a little distally, 6% shorter, narrow ovate, palm oblique, dentate (no teeth 
in figure); finger curved, acute, about °/, as long as 6 joint (in figure 
subequal), with a few minute denticulations along inner edge. Gnathopod 2 
very large, 4! joint produced forward and channelled; 5th large, triangular, 
cup-shaped, as broad as long; 6th very large, hind margin straight, front 
very convex, producing a great bulge a little way from the base, ending in 
a small tooth at the finger-hinge; palm nearly transverse, with large triangular 
median tooth, followed by a cavity and ending with a slightly concave margin, 
finger strong, folding down a little beyond the palm. Peraeopods 1 and 2 
slender, 34 stout, 4% and 5tk successively longer, rather slender. Uropod 1 
the longest, pedunele with large apical spine, rami subequal, shorter than 
peduncle. Uropod 2, inner ramus subequal to peduncle, rather longer than 
outer. Uropod 3 shortest, rami subequal, rather shorter than peduncle. Telson 
subquadrate, sides converging, a rounded emargination extending "'/, of the 
length, between 2 obtuse apices, each with a spinule. L. 4—5 mm. 


South-Paeific (New Zealand). Depth 15 m. 
13. E. maculatus (Johnst) 1827 Gammarus m., &. Johnston in: Zool. 


J., v.8 p.176 | 1888 Gammaropsis m., T. Stebbing in: Rep. Voy. Challenger, v.29 
p-131, 286 | 1893 Protomedeia maculata (part.), A. Della Valle in: F. Fl. Neapel, v.20 


We. N ae 
a 
a, © 

‘ r 


618 Eurystheus, Podoceropsis 


p. 486 t. 14 f. 28—40; t.57 £.8—11 | 1855 Gammarus (Gammaropsis) erythrophthalmus, 


W. Liljeborg in: Vetensk. Ak. Handl., 1853 p.455 | 1871 Gammaropsis e. (part.?), A. 
Boeck in: Forh. Selsk. Christian., 1870 p.241 | 1876 @. e. (part.?), A. Boeck, Skand. 
Arkt. Amphip., v.2 p.581 t.25 £.6 | 1889 @.e., Hoek in: Tijdschr. Nederl, dierk. Ver., 
ser.2 v.2 p.226 t.9 f.4k | 1894 @. erythrophthalma, G. O. Sars, Crust. Norway, v.1 
p.558 t.198 | 1895 @.e., A. O. Walker in: Ann. nat. Hist., ser.6 v.15 p.470 | 1859 
Autonoe e., R.M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 nr.1 p.27 | ?1866 Maera e., 
Cam. Heller in: Denk. Ak. Wien, v.2611 p. 42 | 1856 Eurystheus tridentatus (nom. nud.), 
Bate in: Rep. Brit. Ass., Meet. 25 p.58 | 1857 E.t., Bate in: Ann. nat. Hist., ser. 2 
v.19 p.143 | 1862 E. erythrophthalma + E. bispinimanus + Gammarus maculatus, 
Bate, Cat. Amphip. Brit. Mus., p. 196 t.35 f£.7; p.197 t.35 f.8; p.223 | 1882 Gamma- 
ropsis melanops, &. OÖ. Sars in: Forh. Selsk. Christian., nr. 18 p. 111 1.6 £.5 | 1894 G@. m., 
G.O. Sars, Crust. Norway, v.1 p.560 t.199 £.1. 


Body rather slender, 4 pleon segment (Boeck) armed with 2 minute 
medio-dorsal teeth. Head, lateral lobes acute. Side-plate 2 largest in 9. 
Pleon segment 3, postero-lateral corners quadrate with small tooth, margin 
above more or less bulging. Eyes rather large, oval reniform, red or very 
dark. Antenna 1, 1% joint subequal to 34, or shorter; flagellum 10—15-jointed;; 
accessory flagellum 4—6-jointed.. Antenna 2 rather shorter. Upper lip 
produced acutely or obtusely in front. Gnathopod 1 slender; 5tk and 6th joints 
subequal; palm ill-defined; finger denticulate (Bruzelius). Gnathopod 2 much 
larger; 2% and 5tk joints robust in J, 6 with palm oblique, having 3 (2?) 
teeth or tubercles in the d, 2 in the 9. Peraeopods 3—5, 24 joint well 
expanded or narrowly oval. Uropod 3, rami about as long as peduncle. 
Telson as broad as long, with a spine and usually setules on each side of 
apex. Colour pale yellow with dusky bands. L. 6—12 mm. 


Arctie’ Ocean and North-Atlantie (Greenland, depth 38—112 m; from Norway 
to France; Azores). 


5. Gen. Podoceropsis Boeck 


1861 Podoceropsis (Sp. un.: P.sophia), A. Boeck in: Forh. Skand.Naturf., Mode 8 
p.666 | 1876 P., A. Boeck, Skand. Arkt. Amphip., v.2 p.583 | 1888 P., T. Stebbing in: 
Rep. Voy. Challenger, v.29 p.1108 | 1893 P. (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p. 451 | 1894 P., G. O. Sars, Crust. Norway, v.1 p.574 | 1862 Noenia, Bate 
(& Westwood), Brit. sess. Orust., v.1 p.471 | 1862 Naenia (non J.F. Stephens 1829, 
Lepidoptera!), Bate, Cat. Amphip. Brit. Mus., p.271 | 1871 Xenoclea (Sp. un.: X. batei), 
A. Boeck in: Forh. Selsk. Christian, 1870 p. 234. i 


Like Eurystheus (p. 610), except that antenna 1 has no accessory 


flagellum or only a rudiment of it, and that gnathopod 2 in the GC has 
the 5tb joint always short and in the Q has the 6! joint conspieuously 
wider than that of gnathopod 1. 


5 species. 


Synopsis of species: 


1 Eyes wanting — 2. 
Eyes present — 8. 

9 | Gnathopod 2, palm obliue . . 2.2... 1, P,ebyenl ci p. 619 
Gnathopod 2, palm transverse . ...... 2. P.kermadeci . . . . p.619 

3 Peraeopods 1 and 2, 6th joint very long . . 3. P.lindahlüi. ... . p- 619 
Peraeopods 1 and 2, 6th joint not very long — 4. 

4 | Side-plate 5 not as deep as side-plate 4. . . 4. P.sophia. .... . p- 620 
Side-plate 5 fully as deep as side-plate 4. . 5. P.nitida.. . .. . p- 620 


u Pe ih, un 


1 u 


a A re N ee ee EEE 


Podoceropsis e 619 


1. P.abyssi Chevreux 1887 P.a., Chevreux in: Bull. Soc. zool. France, v,12 
p. 577 | 1893 P.a., A. Della Valle in: F. Fl. Neapel, v.20 p.452 | 1896 Gammaropsis 
abyssorum, J. Bonnier in: Ann. Univ. Lyon, v. 26 p. 661 t.40 f.2. 


Body narrow, elongate. Head with inter-antennal process produced 
into a point. Side-plates small, 1—4th reetangular, 2 the largest. Pleon 
segment 3, postero-lateral corners rounded. Eyes wanting. Antenna 1 ?/, 
as long as body; 1°t joint as long as head, 24 twice as long as 1°, 34 as long as 
24; flagellum with 7 very long joints; accessory flagellum consisting of 1 extre- 
mely short joint. Antenna 2 nearly as long as antenna 1; ultimate and penulti- 
mate joints of peduncle equal; flagellum 5-jointed. Maxillipeds, 4th joint of palp 
long, unguiform. Gnathopod 1 rather large, 5" joint triangular, */, as 
long as 6th, 6th hroadly oval; palm carrying 3 large, obtuse, finely erenulate 
teeth and ending in a smooth acute tooth; finger nearly as long as 6th 
joint. Gmnathopod 1 in Q weaker than in J, gnathopod 8, 5th joint short, 
6th similar to that of gnathopod 1 but larger, palm carıying a sharp tooth, 
followed by several non-erenulate tubercles, finger relatively much shorter. 
Gnathopod 2 in Cd stronger on the right side than on the left. Peraeo- 
pods 3—5, 24 joint long and narrow. Uropods 1—3 with peduncle rather 
short; rami of uropods 1 and 2 with a few spines; rami of uropod 3 bare, 
equal, shorter than peduncle (Bonnier, in figure). Telson small, triangular, 
carrying a large stiff hair towards the middle of its upper part. L. 3—4 mm. 


Bay of Biseay. Depth 510-950 m. 


2. P.kermadeci Stebb. 1888 P. k., T. Stebbing in: Rep. Voy. Challenger, 
».29 p.1109 t.116 | 1893 P.sophiae (part:), A. Della Valle in: F. Fl. Neapel, v.20 p.452. 


Head, lateral lobes acute, not very prominent. Side-plates 1—4 not 
very deep, 24 the largest, broader than deep. No eyes perceived. Antenna 1, 
1° joint longer than the head, a little shorter than 24, subequal to 34; flagellum 
with 6 joints, the 1° longest; a rudimentary accessory flagellum, tipped 
with 2 setules. Antenna 2 rather shorter, like antenna 1 carrying long 
setae; ultimate joint of peduncle slightly shorter than penultimate; flagellum 
with 5 joints, 1° longer than the rest combined. Upper lip faintly emarginate, 
obtusely produced in front. Maxilla 1, inner plate with 3 plumose setae 
on inner margin, 2 apical setules. Maxillipeds, outer plates rather short, 
not strongly armed; 24 joint of palp long, finger short, blunt, tipped with 
spines. Gnathopod 1 rather feeble, 5!" joint fully as long and broad as 
6th; 6th oblong oval, palm finely pectinate, almost transverse; defining angle 
obtuse, much overlapped by the curved finger. Gmnathopod 2, 24 joint with 
eoncave front and convex hind margin, 5th short, cup-shaped, much narrower 
than the 6%, which is of great size, nearly as broad as long, widest at the 
transverse palm, this being much sculptured, with blunt defining tooth, to 
which an acute one is adjacent, separated by a well marked cavity from 
the serrate and dentate portion which meets the hinge of the finger; finger 
curved, almost smooth, and matching the palm. Peraeopods 1 and 2 rather 
long and slender, 6! joint longer than 4%, nearly as long as 24; finger 
half as long as 6*% joint. Rest wanting. Existing portion 5 mm long. 


South-Pacifie (north of Kermadee Islands). Depth 1152 m. 
3. P. lindahlii H. J. Hansen 1887 P.1., H. J. Hansen in: Vid. Meddel., ser. 4 


0.9 p.157 t.6 f.2, 2a | 1893 P.l., A. Della Valle in: F. Fl. Neapel, v.20 p.453 | 1894 
P. lindahli, G. O. Sars, Crust. Norway, v.1 p. 574. 


% 


620 £ Podoceropsis 


Head, lateral lobes somewhat produced, rounded. Side-plate 1 (in 
figure) very small, 24—4th subequal, 5tk deeper. Pleon segment 3, postero- 
lateral corners broadly rounded. Eyes large, ovate, black. Antennae 1 and 2 
subequal, less than half as long as body. Antenna 1 with long setae, 1° 
joint ?/, as long as 24, 34 intermediate in length; flagellum about 8-jointed, 
with no accessory flagellum. Antenna 2, flagellum about 8-jointed. Gnatho- 
pod 1 rather feeble, 6" joint a little shorter and not broader than 5tk, 
finger much longer than the somewhat oblique palm. Gnathopod 2 rather 
robust, 5t" joint short, cup-shaped, 6!" ?/, as broad as long; palm somewhat 
oblique, evenly rounded. Peraeopods 1 and 2 elongate, almost longer than 
peraeopod 5; 6th joint unarmed, very elongate, nearly as long as 4! and 
5th combined. Peraeopods 4 and 5, 24 joint rather narrow, narrowing distally, 
4th and 6th joints subequal. Uropod 3, peduncle rather longer than the sub- 
equal rami. Telsön furnished with 2 setae. Sex and age doubtful. L. 5 mm. 


Davis Strait (West-Greenland). Depth 91 m. 


4. P.sophia Boeek 1861 P.s., A. Boeck in: Forh. Skand. Naturf., Mode 8 
p. 666 | 1888 P. s., T. Stebbing in: Rep. Voy. Challenger, 0.29 p.322 | 1871 P. sophiae, 
A. Boeck in: Forh. Selsk. Christian., 1870 p.242 | 1876 P.s., A. Boeck, Skand. Arkt. 
Amphip., v.2 p.584 t.25 £.7 | 1893 P. s. (part.), A, Della Valle in: F. FI. Neapel, v. 20 
p- 452 t.57 f.21, 22 | 1894 P.s., G. O.Sars, Crust. Norway, v.1 p. 574 t.204 | 1895 
P. s., A. O. Walker in: Ann. nat. Hist., ser. 6 v.15 p.473 | 1862 Noenia tubereulosa + 
N. undata, Bate (& Westwood), Brit. sess. Crust., ®. 1. p. 472, 477 f.. | 1862 Naenia t. + 
N. u., Bate, Cat. Amphip, Brit. Mus., p. 271 t.46 f.2; p. 272 t.46 f.5. 


Head, lateral lobes sharply quadrate. Side-plate 1 small, rounded in 
front, 5tk not so deep as 4h. Pleon segment 3, postero-lateral corners 
with minutely produced obtuse point. Eyes large, broadly oval, bright red. 
Antennae 1 and 2 equal, nearly °/, as long as body. Antenna 1, 1% joint 
shorter than 34, 24 much longer; flagellum shorter than peduncle, about 
10-jointed. Antenna 2, ultimate and penultimate joints of peduncle elongate, 
equal; flagellum 7- or 8-jointed. Upper lip slightly emarginate, very obtusely 
produced in front. Mandibular palp rather slender. Gmathopod 1 slender, 
5ih joint as long as 6%; 6th oval, hind margin with ill-defined palm much 
more convex than front; finger rather long, denticulate. Gnathopod 2 in J, 
5th joint short, cup-shaped, 6!" large, oblong oval, twice as long as broad; 
palm oblique, longer than-hind margin, not strongly defined, with 2 tooth- 
like projections not far from finger-hinge; finger strong, curved. Gnatho- 
pod 2 in 9, 6fh joint very large, oval; palm longer than hind margin, 
minutely serrulate, nearly straight, armed with 3 (Bate: 2) successive spines 
(Sars); finger long, serrate. Peraeopods 1 and 2, 4 joint nearly as long as 
5th and 6tk combined. Peraeopods 3—5, 24 joint oblong oval. Uropod 3, rami a 
little longer than peduncle, with acute, unarmed apex (Sars), tipped with 
spines (Bate, in figure). Telson ovoid, a little longer than broad, with 2 spinules 
on each side of apex. Colour, reddish and yellow bands and patches along 
the sides; ova in pouch bright red. L. 6 mm. 

North-Atlantie, North-Sea, Skagerrak and Kattegat (Norway, Denmark, Holland, 
Great Britain, France). Depth 56—282 m. 


5. P. nitida (Stimps.) 1858 Podocerus nitidus, Stimpson in: Smithson. Contr., 
v.6.nr.5p.45 | 1862 Noenia rimapalmata (N.rimapalma Bate) + N. excavata (Bate), Bate & 
Westwood, Brit. sess. Crust., v.1 p. 474 f.; p.476f. | 1862 Naenia rimapalma + N. e., 
Bate, Cat. Amphip. Brit. Mus., p.272 t.46 f.3,4 | 1877 Podoceropsis rimapalmata + 
N. e., Meinert in: Naturh. Tidsskr., ser.8 «.11 p.152 | 1879 N.r., T. Stebbing in: Rep. 


Mr ei TEN, Alm A Fe ae Er BR ra a, a A er 
DR Re MERTEE En pn PER IS 


Podoceropsis, Megamphopus | 621 


Devonsh. Ass., «. 11 p.520 | 1894 Podoceropsis excavata, G. O. Sars, Crust. Norway, ®.1 
p. 576 t.205 | ?1867 Noenia caudadentata (nom. nud.), A. M. Norman in: Nat. Hist. Tr. 
Northumb., v.1 p.16 | 1871 Xenoclea batei, A. Boeck in: Forh. Selsk. Christian., 1870 
p-235 | 1876 X.b., A. Boeck, Skand. Arkt. Amphip., v.2 p.561 t.25 f.8 | 1890 Podo- 
ceropsis b., Meinert in: Udb. Hauchs, v.3 p.178 | 1876 Xenoclea megachir, S. 1. Smith & 
Harger in: Tr. Connect. Ac., v.3 p.82 t.3 £.1—4 | 1893 Podoceropsis sophiae (part.), 
A.DellaValle in: F. Fi. Neapel, v.20 p. 452, 

Body rather -stouter than in P. sophia; head with lateral lobes 
more acutely produced with less convex lower margin. Side-plate 1 not 
very small, 24 in  broader than deep, 5th fully as deep as 4. Pleon 
segment 3, postero-lateral corners with obtuse point scarcely produced. Eyes 
of moderate size, rounded oval, dark. Antennae 1 and 2 equal, more than 
’, as long as body; peduncles as in P. sophia; flagellum of antenna 1 
12—16-jointed, of antenna 2 13-jointed. Upper lip feebly emarginate, 
produced in front to a sharp point. Mandibular palp not very slender. 
Gnathopod 1 very slender, 6th joint scarcely as long as 5tt, subfusiform, 
finger very long. Gmathopod 2 in JS, 5th joint short, eup-shaped, 6th very 
large, oblong oval; palm minutely tuberculate, with a median sinus between 
2 lobes, that near the finger-hinge truncate and a little emarginate, the 
other dentiform not far from the defining angle, which is scarcely reached 
by the broad curved finger. Gmathopod 2 in 2 as in J, except that the 
cavity in the palm is wider, not bounded by a separate lobe near finger- 
hinge, and the tooth on the other side is closer to the defining angle. Peraeo- 
pods 1—2, 4 joint not nearly as long as 5!" and 6" combined. Peraeopod 3, 
24 joint nearly as broad as long. Peraeopods 4 and 5, 24 joint oblong 
oval. Uropod 3, rami rather unequal, a little shorter than peduncle, the 
inner the larger, tipped with 2 setules. Telson as broad as long, with 3 
slender spines on either side of apex. Colour, variegated with dark brown, 
especially along the sides. L. 7—8 mm. 

North-Atlantie, North-Sea, Skagerrak and Kattegat (Norway, Denmark, Holland, 
Great Britain, Hake Bay [Grand Manan]). Depth 56—75 m. 


6. Gen. Megamphopus Norm. 


1869 Megamphopus (Sp. typ.: M. cornutus), A. M. Norman in: Rep. Brit. Ass., 
Meet. 38 p.282 | 1894 M., G. O. Sars, Crust. Norway, v.1 p.568. 


Body slender. Head, lateral lobes projecting. Side-plate 2 in J the 
largest, 34 and 4th successively smaller. Eyes well developed. Antennae 1 
and 2 very slender. Antenna 1 the shorter, with very small accessory 
flagellum. Mouth-parts as in Eurystheus (p. 610), except that 34 joint of 
mandibular palp is relatively shorter. Gnathopods 1 and 2 with 5% and 6% 
joints elongate, strongly developed though weakly subchelate in 9, feebly 
developed, almost simple, and subequal in 9. In other respects scarcely 
differing from Eurystheus. 


1 species. 


1. M. cornutus Norm. 1869 M.c., A.M. Norman in: Rep. Brit. Ass., Meet. 38 
p-282 | 1894 M.c., G.O. Sars, Crust. Norway, v.1 p.564 t.200 | 1895 M.c., A. O. Walker 
in P. Liverp. biol. Soe., .9 p.311 | 1871 Protomedeia longimana, A. Boeck in: Forh. 
Selsk. Christian., 1870 p.240 | 1876 P.1.,, A. Boeck, Skand. Arkt. Amphip.. v.2 p. 578 
t.25 f.4; t.29 £.5 | 1892 P. 1, D. Robertson in: P. nat. Hist. Soc. Glasgow, n. ser. 
v.3 p.220 | 1878 P. intermedia, T. Stebbing in: Ann. nat. Hist., ser.5 v.2 p. 367 t.15 
£.3 | 1888 Podoceropsis (part.)?, T. Stebbing in: Rep. Voy. Challenger, v.29 p.1108 | 1893 
P. (part.)?. A. Della Valle in: F. Fi. Neapel, v.20 p. 451. 


622 Megamıphopus, Go&sia 


Head, lateral lobes acutely produced. Side-platel in Q oblong, in JS with 
an acutely produced and deflexed apex; 24—4th subequal, with 5th a little 
less deep than 4 in oO; but in d 24 much larger than the rest, 4! smaller 
than 34, not deeper than 5tk, Pleon segment 3, postero-lateral corners 
broadly rounded. Eyes rather large, oval, dark brown. Antenna 1 less 
than '/, as long as body, 1° joint short and thick, as long as 34, 24 much 
longer; flagellum 8—10-jointed ; accessory flagellum consisting of 1 small joint. 
Antenna 2 rather longer, antepenultimate joint of peduncle not very short, 
ultimate rather longer than penultimate; flagellum 10-jointed. Upper lip 
rounded, middle of margin truncate, bluntly produced in front. Maxilla 1, 
inner plate with 1 apical seta. Gmnathopod 1 in S, 24 joint slender, 5tk 
nearly as long, stouter, hind margin ending in a small obtuse tooth; 6%: shorter, 
oblong oval, palm scarcely defined from short hind margin, finely crenulate, 
set with spines; finger very long, compressed, its breadth nearly uniform 
except at the ends. Gnathopod 2 in JS considerably stronger, 24 joint 
abruptly eurved at base, 5tk stout, long, 6!" somewhat stouter, longer, front 
margin convex, hind straight, setose; the short palm with a median tubercle; 
the finger similar to that of gnathopod 1, folding on to surface of 6! joint 
parallel and close to hind margin. Gnathopod 1 in O, 6: joint nearly as 
long as 5th, subfusiform; palm but slightly defined; finger slender. Gnatho- 
pod 2 in © not much stronger, 5!" joint as long as the tapering 6th, in. 
which the palm is scarcely at all defined. Peraeopods 1 and 2 rather 
compact. Peraeopods 3—5 more slender, 24 joint oblong oval. Uropod 3, 
rami longer than peduncle, outer shorter than inner. Telson subquadrate, 
rather broader than long, with spine at each angle of base of the triangular 
apex. Colour whitish, pellueid, darkened by red and brown specks. L.5—8 mm. 


Arctie Ocean, North-Atlantie and adjoining seas (from Lofoten Isles to the Bristol 
Channel). Depth 11—56 m. 


7. Gen. Go6sia Boeck 


1871 Goesia (Sp. un.: @. depressa), A. Boeck in: Forh. Selsk. Christian., 1870 
p. 231 | 1876 @., A. Boeck, Skand. Arkt. Amphip., v.2 p. 550. 


Head, lateral lobes little produced. Side-plates of medium depth, 
5th not so deep as 4b, the lower margin fringed with setae. Antenna 1 
‚the longer, pedunele shorter than flagellum, accessory flagellum obsolete. 
Maxillipeds (Goös, in figure), palp 3-jointed. Gnathopod 1 as in Leptocheirus 
(p. 625). Gnathopod 2 subchelate, but not strongly, setose, the 6tk joint as 
broad as the 5t%, which is not very elongate. Otherwise as in Leptocheirus. 


1 species. 


1. G. depressa (Goös) 1866 Autonoe d., Goes in: Öfv. Ak. Förh., v.22 p. 532 
t.4l f.32 | 1871 Goösia d., A. Boeck in: Forh. Selsk. Christian., 1870 p.231 | 1876 
@.d., A. Boeck, Skand. Arkt. Amphip., v.2 p. 550. 


Side-plate 1 narrowed below, 24 and 34 deeper than 4b, Pleon 
segment 3, postero-lateral corners acutely produced. Eyes very small, oval. 
Antenna 1 more than ?/, as long as body, 24 joint rather longer than 1*%, 
3% small; flagellum 20—25-jointed, accessory flagellum not apparent in 
figure. Antenna 2 much shorter; ultimate and penultimate joints of peduncle 
subequal; flagellum 10—15-jointed. In the figure 34 joint of mandibular 
palp is longer than 24, maxilla 1 has a long inner plate devoid of setae, 
maxilla 2 has the inner plate not fringed on inner margin, and the maxilliped’s 


“i 
| 
| 


ee 


Goesia, Protomedeia 623 


palp has no finger, but these points are doubtful without description. 
Gnathopod 1, 34 joint prominent, 3d—6!k strongly setose on hind margin, 
5th scarcely so long or broad as 6!%; palm of 6" short, transverse, overlapped 
by the small pectinate finger. Gmnathopod 2, 24 and 6% joints with very 
long plumose setae fringing front margin; 5! joint a little longer, not 
broader, than 6%, widening distally; 6% narrowing to small oblique palm, 
defined by a strong palmar spine; finger rather strong, curved, smooth. 
Peraeopods 1 and 2 rather long. Peraeopod 3 short, peraeopod 4 a little, 
and peraeopod 5 much longer; 24 joint of peraeopods 3—5 narrowly oblong 
oval. Uropods 1 and 2 rather stout; rami a little unequal. Uropod 3 very 
short; rami equal, elliptic or ovate, scarcely as long as the short, stout 
peduncle. Telson very short, twice as broad as long; sides converging to 
the slightly sinuous apex, which has a pair of plumose setules at each angle. 
L. 12 mm. 


Arctie Ocean (Spitzbergen). Depth 9 m. 


8. Gen. Protomedeia Kroyer 


1842 Protomedeia (Sp. un.: P. fasciata), Kroyer in: Naturh. Tidsskr., v.4 p. 154 | 
1855 [Subgen.] Gammaropsis (part.), W. Liljeborg in: Vetensk. Ak. Handl., 1853 p.455 | 
1859 Autonoe (part.), R. M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 nr.1 p. 23. 


Side-plates rather small, 24 in J larger than 34 or 4b, 5th deeper 
than 4b, especially in SC. Antenna 1 longer than antenna 2; accessory 
flagellum well developed. Upper lip, margin rounded. Mandible, molar 
strong, 34 joint of palp subequal to 2%, very setose. Maxilla 1, inner plate 
small, with a few hairs on the margin, outer plate with 10 spines; 24 joint 
of palp long, with truncate apex. Maxilla 2, inner plate not fringed with 
spines or setae along the inner margin, though there are some scattered 
hairs; outer plate the longer, widening to the triangular closely fringed 
apex. Maxillipeds well armed, 4tk joint of palp very short. Gmathopod 1 
slender, with 5tk and 6th joints subequal. Gmathopod 2 in S much larger 


than gnathopod 1, 5tk joint larger than 6"; in oO similar to gnathopod 1 


and not much larger. Peraeopods 1 and 2 with slender 6% joint and finger; 
peraeopod 1, as the gnathopods 1 and 2, very setose. Peraeopods 3—5, 
24 joint moderately expanded; peraeopod 4 longer than 34, 5th Jonger than 4th, 
Uropod 3 the shortest, rami unequal, spinose. Telson rounded, with hook 
at each side of the broad apex. 


1 species. 


1. P. fasciata Kroyer 1842 P. f., Kreyer in: Naturh. Tidsskr., v.4 p.154 | 
1876 P.f., A. Boeck, Skand. Arkt. Amphip., v.2 p.576 t.25 f.1 | 1884 P. f., J.S. 
Schneider in: Tromss Mus. Aarsh., v.7 p.124 | 1893 P. f.,-A. Della Valle in: F. Fl. 
Neapel, v.20 p.435 t.57 £.6,7 | 1894 P.f., G.O.Sars, Crust. Norway, v.1 p.552 t.196 | 
1855 Gammarus (Gammaropsis) macrony&, W. Liljeborg in: Vetensk. Ak. Handl., 
1853 p.458 | 1859 Autonoe m., R.M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 nr. 1 
p.29 t.1 f.6 | 1866 Autono& m., Goes in: Öfv. Ak. Förh., v.22 p.531 t. 40 f.51 | 1862 
Microdentopus m., Microdeutopus m. + Protomedeia fasciata, Bate, Cat. Amphip. Brit. 
Mus., p. 167, 379; p. 172. 


Body rather slender, subdepressed. Peraeon segment 2 much longer 
in S than in 9. Head, lateral lobes little produced. Side-plate 1 sub- 
rhomboidal in Q, front corner a little more produced in C, lower margin 
setose; 24—4th nearly alike in oO; 24ind both broader and more rounded; 5tkin 
6) little deeper than 4", in S much deeper and with front lobe more squared. 


624 Protomedeia, Xenocheira 


Pleon segment 3, postero-lateral eorners rotundo-quadrate. Eyes very small, 
rounded oval, black. Antenna 1 scarcely over half as long as body; 34 joint 
about half as long as 1° or 24; flagellum much longer than pedunele, about 
14-jointed (Sars) (Schneider: 22-jointed); accessory flagellum 5—7-jointed. 
Antenna 2, ultimate joint of peduncle subequal to penultimate or flagellum, the 
latter 6- or 7-jointed. Upper lip with apex entire (indented in Sars, figure). Gnatho- 
pod 1 in S, 24 joint distally widened, 5th rather longer than 6%, which is 
oblong oval, with short rounded palm overlapped by small finger. Gmnatho- 
pod 2 in JS, 5th joint very broad, longer than broad, distally truncate; 
6th narrower and shorter, yet broadly oval, with strongly serrate hind margin 
and palm; finger rather strong. Gmathopod 1 in ©, 24 joint not expanded 
distally; 5% joint searcely longer than 6%, Gnathopod 2 in Q, 24 joint long, 
slender, fringed on both margins with long plumose setae, 6 joint rather 
longer than 5t", slightly tapering, palm very short, finger small. Peraeo- 
pods 1 and 2, 4th joint about as long as 5 and 6tk combined and much 
wider, in peraeopod 1 this and the 24 joint densely setose; finger as long 
as 6th joint or longer. Peraeopods 3—5, 24 joint oblong oval, narrowing 
a little downward. Uropod 3, inner ramus the shorter, both spinose, outer 
also tipped with a slender seta. Telson about as broad as long, having on 
either side of the broadiy rounded apical margin a little spine-like hook 
and 2 or 3 slender spines. Colour whitish with straight brown bands erossing 
the segments and corresponding blotches on side-plates. L. 8 mm. 


Arctie Ocean, North-Atlantie, North-Sea, Skagerrak and Kattegat (Greenland, 
‚Spitzbergen, Iceland, Finmark |Norway], Sweden, Denmark). Depth 11—73 m. 


9, Gen. Xenocheira Hasw. 


1879 Xenocheira (Sp. un.: X. fasciata), Haswell in: P. Linn. Soe. N. S. Wales, 
©.4 p.272 | 1893, A. Della Valle in: F. Fl. Neapel, 7.20 p.433, 948 | 1881 Xenochira, 
E. v. Martens in: Zool. Rec., 0.16 Crust. p.31. 


Side-plates all shallow. Antenna 1 much the longer, 34 joint not 
elongate; with accessory flagellum. Maxillipeds described as non-unguiculate 
(palp 3-jointed). Gnathopod 1 subchelate. Gnathopod 2 simple, the 5tk joint 
broadly expanded in front of the neighbouring joints, and described as arti- 
«ulating at its base with the 34 joint. Gmathopods 1 and 2 both setose. 


l species. 


1. X. fasciata Hasw. 1879 X. f., Haswell in: P. Linn. Soc. N. S. Wales, v.4 
p.272t.11f.6 | 1885 X. /,, Haswellin: P. Linn. Soc. N. S. Wales, 0.10 p.105 t.16 £.1—3. 


Body slender, perhaps subdepressed; pleon segment 3 the longest. 
Head, lateral lobes scarcely prominent. Side-plates 1—4 small, 5tk (in 
figure) nearly as deep, broader. Eyes round. Antenna 1 more than half 
as long as body, 1° joint rather longer than head, 24a little longer than 1, 
3dabout "/, as long as 24; flagellum longer than pedunele. Antenna 2 with longer 
peduncle; ultimate joint of peduncle shorter than penultimate, longer than 
the 9-jointed flagellum. Maxillipeds, outer plates and palp with a close 
fringe of long hairs. Gnathopod 1, 5th joint short, triangular, masked behind 
by the triangular 4%; 6th twice as long as 5tk, narrow, convex in front, 
with straight hind margin; finger (in figure, 1885) smooth, small, but over- 
lapping the short, almost transverse palm. Gnathopod 2, 34 joint subtriangular, 
artieulating with both 4! and 5th, 5tk with a broad free distal margin, 


a a ne 1 is De I Ser Mr ae 


LETTER, 


g 


ai 


Xenocheira, Leptocheirus 625 


fringed with setae which reach to end of the long narrow setose 6*"; the narrowly 
rounded apex of the 6! joint is oecupied by a very small, bent finger. Peraeopod 2 
(in figure) slender. Peraeopod 3 (in figure) shorter, with piriform 24 joint. 
Uropods 1 and 2 armed with a few acute spines. Uropod 3, rami narrow, 
with marginal spinules and apical setae. Telson scale-like, very short. L. 7 mm. 


Port-Jackson [East-Australia]. 


10. Gen. Leptocheirus Zadd. r 


1844 Leptocheirus (Sp. un.: L. pilosus), Zaddach, Syn. Crust. Pruss., p.7.| 1876 
L., A. Boeck, Skand. Arkt. Amphip., v.2 p.547 | 1888 L., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p. 1707 | 1893 L., A. Della Valle in: F. Fl. Neapel, v.20 p.426 | 1894 
L., G. O. Sars, Crust. Norway, v.1 p. 554 | 1853 Leptochirus (non Germar 1824, 
Coleoptera!), J. D. Dana in: U. S. expl. Exp., v. 13m p.910 | 1853 Ptilocheirus (Sp. 
un.: P. pinguis), Stimpson i in: Smithson. Contr., ©.6 nr.5 p.55 | 1871 Boeckia (Sp. un.: 
B.typica), A.W. Malm in: Öfv. Ak. Förh., v. 97 p: 543. 


Body not strongly compressed. Pleon segment 3 the longest. Head 
without conspieuous rostrum. Side-plate 2 the largest,. sometimes entirely 
concealing the 1°; side-plate 5 with front lobe much deeper than the hind 
one. Antenna 1 the longer, 34 joint of peduncle not exceptionally long, 
accessory flagellum usually present. Upper lip subquadrate, faintly emarginate. 
Lower lip said to have the inner lobes sometimes partially coalesced. Mandible 
with 6—16 spines in spine-row, 1° joint of palp not much shorter, 34 rather 
longer than 2%. Maxilla 1, inner plate rather large, usually only with 1 seta 
at tip, outer with 11 spines (L. pinguis), but perhaps more commonly 10 
(said to have 14 in Boeckia typica = L. hirsutimanus). Maxilla 2, inner 
plate the shorter, narrowed distally, fringed on inner margin. Maxillipeds, inner 
and outer plates well developed, but rather narrow, finger of palp short, 
obtuse. Gnathopod 1, 24 joint fringed on front, 3@—6tk on hind margin; 
34 hulging behind; 6tk with palm well or ill-defined but short, finger short. 
Gnathopod 2 simple, 24, 5tk and 6tk joints with long fringes in front, 5th 
longer than the tapering 6!"; finger weak. Peraeopods 3—5, 24 joint expanded; 
peraeopod 5 much the longest. Uropods 1 and 2, peduncle produced into 
a long spine-like apical process, rami robust, spinose. Uropod 3, rami short, 
longer than peduncle. Telson short. 


8 species aecepted, 1 obscure. 


Synopsis of accepted species: 


Gnathopod 1 longer and much stouter than 
N AT A a BE AA 1. L. cornuaurei. . . . p.626 
Gnathopod 1 not longer and not much stouter 
than gnathopod 2 — 2. 


pP 


Antenna 1 without accessory flagellum . . . 2. L.aberrans. .... p. 626 


3 Antenna 1: with accessory flagellum — 3. 


Br a N 8... DIDRUIS 0 5 0% p- 627 
Side-plates 1—4 without spiniferous serrations 

of hind margin — 4. 
Pleon segment 4 not dentate. . ...... 4. L. hirsutimanus . . p.627 


4 Pleon segment 4 dentate — 5. 


Pleon segment 4 with 2 dorsal teeth — 6. 
Pleon segment 4 with 3 dorsal teeth — 7. 


Das Tierreich. 21. Lief.: T.R. R. Stebbing, Amphipoda I. 40 


| Side-plates 1—4 with spiniferous serrations of 
2 


626 Leptocheirus 


Side-platel, lowerfrontcornerstrongly produced 5. L. dellavallei ... . . p.628 
6 Side-plate 1, lower front corner not strongly 


EP EEE En‘ 6. L. peetinatus . . . . p. 629 
Pleon segment 4, teeth small; eolour tawny 

win rk apble: 242: 0 ee 7. L. guttatus . .». . p- 629 
Pleon segment 4, teeth large; colour yellow 

wich dark ibanda ee 8. L. trieristatus . . . p.629 


1. L. cornuaurei Sowinski 1898 L. c., Sowinski in: Möm. Soc. Kiew, v.15 


p.470 1.9 1.928. 


o unknown. — d. Side-plate 1 oblong, with rounded margin, 24 large, 
distally much widened and outdrawn. Antenna 1, 24 joint much longer 
and narrower than 1°, 3 more than '/, as long as 2%; flagellum and accessory 
flagellum missing. Antenna 2, flagellum ’/, longer than ultimate joint of 
peduncle, of 12 joints, the last rudimentary. Mandible with spine-row of 6 spines. 
Maxilla 1 with a single seta on inner plate. Gmnathopod 1 thicker and longer 
than gnathopod 2; 24 joint comparatively short and strong, narrowed at base, 
(in figure without setae on front margin), 4" much narrower than 34, 5th stout, 
not twice as long as broad, a little shorter and narrower than the oblong 6tk, 
which also is not twice as long as broad; palm rather oblique, not strongly 
defined, matching the stout finger; joints 3—5 densely setose on hind margin, 
but 6tk joint not densely. Gmathopod 2 of much the same structure as in 
L. guttatus (p. 629); 4% joint subequal in length to the tapering 6*", which is 
only sligehtly shorter than the 5%; all with the usual armature; finger small. 
Peraeopods 1 and 2, 6% joint a little shorter and much narrower than 4th, 
finger half as long as 6%. Peraeopods 3—5, 24 joint well expanded, in 
peraeopod 3 narrowed distally; 6% joint longer than 4, finger short. Uropod 2, 
rami with few spines; in uropod 3 both rami ending with a group of setae. 
Telson broader than long, the apical margin concave, crenulate, with 2 pairs 
of setules. L. 5 mm. 


Bosphorus (Golden Horn [Constantinople)). 


2. L. aberrans (Ohlin) 1895 Protomedeia a., Ohlin in: Acta Univ. Lund., v.31 
nr.6 p.53 f.7—14. 


Body slender, but back tolerably broad, rounded. Head, lateral corners 
produced, subacute. Side-plate 1 as deep as 24 but only half as broad, 
24 larger than 34 or 4h, 5th with front lobe little deeper than hind one. 
Pleon segment 3,. postero-lateral corners produced into a small acute tooth. 
Eyes apparently absent. Antenna 1 longer than 24, longer than half the 
body; 1° joint a little shorter than 24, 34 about /, length of 24; flagellum 
rather longer than peduncle, 11-jointed; accessory flagellum absent. Antenna 2 
*/,—'/; shorter than antenna 1; antepenultimate joint of peduncle broad, 
ultimate and penultimate joints equal and together as long as the 5-jointed 
flagellum. Gnathopod 1, 24 joint shorter than 5th and 6tk combined, fringed 
on front margin, 3% bulging behind, with very long subapical setae, 4! not 
. longer than 34, 4th__6tk fringed on hind margin, 6% as long as 5th, a little 
wider, narrowly oblong; the short palm nearly transverse, a little overlapped 
by the finger. Gnathopod 2, 24 joint fringed on front with very long setae, 
5th considerably longer than 6!, 6th with palm very oblique, ill-defined 
except by a palmar spine; finger smooth, rather stout, as long as palm. 
Peraeopods 1 and 2, finger long, acute, as long as 6" joint. Peraeopod 5 
the longest, nearly as long as body, 24, 4th and 5th joints equal, 6b nearly 


REN 


RE NN 


Ka A 


Leptocheirus 627 


as long as 4 and 5th dombined. Uropods 1—3, peduncle in all reaching 
a little beyond the telson. Uropod 3, rami short, not longer than distal 
breadth of peduncle, outer very little the longer, each with 4 apical setae. 
Telson short, broader than long, faintly emarginate. L. 5 mm. 

Baffıns Bay (lat. 73°N.). Depth 22—32 m. 


3. L. pinguis (Stimps.) 1855 Ptilocheirus p., Stimpson in: Smithson. Contr., 
v.6 nr.5 p.56 | 1888 Leptocheirus p., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 279 | 
1893 L.p., A. Della Valle in: F. Fl. Neapel, v.20 p.432 t.57 £.1—3 | 1894 L.p»., G. 
O. Sars, Crust. Norway, v.1 p.555 | 1862 Protomedeia fimbriata (Gammarus fimbriatus 
Stimpson in MS.) + P.p., Bate, Cat. Amphip. Brit. Mus., p.169 t.81 f.1; p.170 t.31 £.2. 


Body very broad anteriorly, narrowing behind, peraeon not much 
compressed, with back only slightly vaulted; peraeon segment 1 in d as 
long as 24 and 34 combined, in © only as long as 24; pleon segment 4 
produced on each side to an obtuse dorso-lateral tooth or angle, 5!" and 6th 
with similar projeetions, more acute, accompanied by several spinules. Head 
broader than long. with minute rostrum; lateral lobes produced, not large, 


 rounded. In o side-plate 1 linguiform, strongly produced forward, obtusely 


pointed; 1%°—4tk with hind margin serrate, spiniferous; 24 overlapping only 
a small part of the 1%, deeper and much broader than 1° and deeper than 
broad; 34 and 4 as deep as 24 but less broad; 5t with front lobe narrow, 
distally narrowed, less deep than 4"; 6tk and 7% very small. In S (Stimpson) 
side-plate 1 large, subrhomboidal, 24 much the largest, projecting downward, 


- furrowed along the middle. Pleon segment 3, postero-lateral corners a 


little obtusely quadrate. Eyes obliquely oval, or reniform, dark. Antenna 1 
scarcely half as long as body; 1° and 24 joints rather long, equal, 34 about "/, 
as long as 24; flagellum longer than peduncle, more than 23-jointed, accessory 
flagellum 8-jointed. Antenna 2 a little shorter, ultimate joint of peduncle 
shorter than penultimate, scarcely as long as the 14-jointed flagellum. 
Upper lip with pointed process at each upper angle. Mandible with 15 or 
16 spines in the spine-row. Maxilla 1, outer plate with 11 spines. Maxillipeds, 
outer plates with inner margin densely fringed, the spines slender. Gmnatho- 
pod 1, 6% joint as long as 5tk, gently widening to the transverse, convex, 


'setulose palm, over which the denticulate finger is closely fitted without 


quite reaching the angle. Gnathopod 2, besides the usual fringes the 4% 
joint has long setae on lower front margin; 5th and 6th are densely fringed 
on hind margin; 6!% much more than half as long as 5", only a little 
tapering but without palm, about twice as long as the slender setulose finger. 
Peraeopods 1 and 2, 4 joint longer than 5tk or 6. Peraedpods 3—5, 
24 joint broadly oeblong oval. Pleopods, peduncle short, coupling spines 2, 
with dentate margins, rami very long, inner with 30 joints, outer considerably 


-.‚shorter, with 28. Uropods 1 and 2, rami a little unequal, not especially 


robust, rather longer than peduncle, its process not being included. Uropod 3, 
process of peduncle short. Telson very short, broader than long, centre of 
apex convex; each angle raised, carrying an oblique surface row of spinules, 
while higher up on each side, the surface has a row of 5 spines. Colour, 
transverse bands of dark grey on a light ground, antennae and legs white, 
except expansion of 24 joint in peraeopods 3—5. L.reaching 16 mm. 


North-Atlantic (New England and north to Labrador). Low-water mark to 
at least ren. 


4. L. hirsutimanus (Bate) 1862 Protomedeia hirsutimana, Bate (& Westwood), 
Brit. sess. Crust., v.1 p.298 f. | 1862 P. hirsutimanus, Bate, Cat. Amphip. Brit. Mus., 
p-168 1.80 £.6 | ?1866 P.h., Cam. Heller in: Denk. Ak. Wien, 0.2611 p.34 | ?1866 


40* 


Be a Eat a Sl ei, 
% Far ae © a ae > ea no oe 


628 : Leptocheirus 


P. h., E. Grube in: Arch. Naturg.. «.321 p.402 | 1887 Ptilocheirus h., Ohevreux in: 
Bull. Soc, zool. France, v.12 p.309 | 1888 Leptocheirus h., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.561 | 1895 L. h., A. O. Walker in: P. Liverp. biol. Soc., v.9 p.310 | 
1895 L. h., A. O. Walker in: Ann. nat. Hist., ser.6 v.15 p.469 | 1871 L. pilosus (non 
Zaddach 1844!), A. Boeck in: Forh. Selsk. Christian., 1870 p.230 | 1894 L. p., 6.0. 
Sars, Crust. Norway, v.1 p.555 t.197 | 1871 Boeckia typica, A. W.Malm in: Öfy. Ak. 
Förh., v.27 p.544 t.5 f.1, lag. 


Body rather stout, somewhat compressed, but back broadiy rounded; 
pleon without teeth. Head, lateral lobes rounded, little prominent. Side- 
plate 1 very small, acutely quadrate, covered by the very large, greatly 
produced, in front broadly rounded 24 side-plate; 34 and 4th narrowly oblong, 
deep; narrow front lobe of 5! not quite so deep, as 4, Pleon segment 3, 
postero-lateral corners rounded, slightly erenulate above. Eyes small, rounded, 
dark. Antenna 1 not nearly half as long as body; 1° joint slightly longer 
than 24 or equal to it, 34 half as long as 24; flagellum 16 —20-jointed; accessory 
flagellum 4—6 jointed. Antenna 2 rather shorter; ultimate and penultimate 
joints of pedunele subequal; flagellum 9-jointed. Gnathopod 1, 5t% joint 
not twice ‘as long as 6%, which is broader distally, with short palm and 
small finger (Boeck), or: 6! (in Q) about as long as 5th and scarcely 
broader, palm somewhat oblique, finger (in figure) matching or scarcely 
overlapping it (Sars). Gnathopod 2, 5t" joint more than twice as long 
as 6", long oval, junction with 6!" a little oblique, 6 tapering; finger 
short, nearly straight, setuliferous. Peraeopods 1 and 2, 24 and 4! joints 
moderately wide, 6! long aud narrow, finger short, slender, scarcely more 
than ’/, as long as 6! joint. Peraeopod 3, 24 joint narrowed distally, front 
very convex, hind margin very sinuous; 5% joint longer than 4 or 6th; 
finger very small. Peraeopods 4 and 5 successively longer; 24 joint oblong 
oval and as in peraeopod 3 fringed behind with plumose setae; finger short, 
bidentate. Uropods 1 and 2 unusually strong, especially the 24, which have 
short broad peduncle, rami very stout, each with double row of stout spines. 
Uropod 3 very small, rami a little longer than peduncle, tapering, with 
lateral spines and apical setae. Telson rather broader than long, with a 
spine at each lateral angle of the apex. Colour dark grey, with lighter 
flecks of various sizes. L.8 mm. 


North-Atlantie with adjoining seas (from Norway to France). 


5. L. dellavallei Stebb. 1864 Protomedeia fasciata (non Kroyer 1842!), 
A. Costa in: Annuario Mus. Napoli, v.2 p.155 t.2 £.8 | 1893 Leptocheirus pilosus (part., 
non Zaddach 1844!); A. Della Vallein: F. Fl. Neapel, v.20 p.427 t.4 f.10; t.12 £.1—14 | 
1899 L. dellavallei, T. Stebbing in: Ann. nat. Hist., ser. 7 v.3 p. 350. 


Body rather slender, pleon segment 4 with 2 dorso-lateral teeth and 
perhaps a median one, all accompanied by spinules. Side-plate 1 with lower 
front angle produced into a long acute process, length and acuteness a little 
variable. Side-plate 2 very large, broader than deep, rounded in front. 
Eyes round. Antenna 1, 1% joint stout, 24 a little longer, 34 rather over 
!/), as long as 24; flagellum about 12-jointed; accessory flagellum 2-jointed, 
as long as 1° joint of primary. Antenna 2 much shorter, ultimate and 
penultimate joints of peduncle equal. Gmathopod 1, 5tk joint longer than 
64, which is oblong, a little widened near the short truncate palm; finger 
curved, reaching beyond the palm, with a decurrent spine near the apex. 
Gnathopod 2 nearly as in L. hirsutimanus (p. 627), but 5tk and 6th joints 
rather narrower, 6tk more than half as long as 5th, Peraeopods 1 and 2, 6 
joint long and slender, finger nearly as long or (Della Valle) even longer. 


„2 72 24 Soc u Pi 


CE 


BASE I u a a 


2 


Leptocheirus 629 


Peraeopod 3, 24 joint broadly oval, both margins convex (in figure); 4th 
joint longer than 5% or 6th; finger small. Peraeopods 4 and 5, 24 joint 
broadly oval; peraeopod 5 much the longest. Uropods 1—3 reaching nearly 
the same level, the rami long, unequal, the spines long and slender. Uropod 1, 
rami slender, longer than pedunele. Uropod 2, pedunele rather short, as in 
uropod 1 with long apical spine, rami longer than peduncle, the longer also 
much the stouter. Uropod 3, peduncle with tooth at inner angle, rami 
longer than pedunele. Telson broad, but short, lateral angles of apex very 
prominent, each with a spine, the apex triangular, produced to an obtuse 
point. Colour lemon-yellow, sprinkled with many red-brown spots. L. 6—7 mm. 


Bay of Naples. Depth 10—20 m. 


6. L. pectinatus (Norm.) 1869 Protomedeia pectinata, A.M. Norman in: Rep. 
Brit. Ass., Meet.38 p.283 | 1887 Ptilocheirus pectinatus, Chevreux in: Bull. Soc. zool. France, 
v.12 p.309 | 1888 Leptocheirus p., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1707 | 
1894 L.p., G. O.Sars, Crust. Norway, v.1 p.555 | 1893 L. pilosus (part.), A. Della 


. Valle in: F. Fl. Neapel, v.20 p.427 | 1895 L.p., A. O. Walker in: P. Liverp. biol. Soe., 


v.9 p.310, 


- Agreeing with L. dellavallei (p. 628) except in the following partieulars. 
Side-plate 1 quadrate, lower front corner scarcely produced, slightly obtuse, 
Antenna 1, 34 joint °/, (sometimes less) as long as 2%; flagellum about 
10-jointed. Antenna 2 relatively longer, the ultimate and penultimate joints 
of peduncle being more elongate. Peraeopods 1 and 2 with 6!% joint and 
finger not quite so long and slender as in L. dellavallei. Peraeopods 3—5 
probably in agreement with that species. Uropods 1—3, spines seemingly 
less elongate. Uropod 3, tooth at inner angle of peduncle more produced. 
Telson, apical border between the prominent angles not triangular but gently 
convex. L. about 5 mm. 


North-Atlantic (Shetland Islands). 


7. L. guttatus (Grube) 1864 Protomedeia guttata, E. Grube in: Jahresber. 
Schles. Ges., v.41 p.63 | 1866 P. g., E. Grube in: Arch. Naturg., 0.321 p.408 t.10 
f.3 | 1888 Leptocheirus guttatus, T. Stebbing in: Rep. Voy. VRRMAngeT, v.29 p. 366 | 
1894 L. g., G. O. Sars, Crust. Norway, v.1 p. 555. 


©. Pleon segment 4 with 3 medio-dorsal small teeth, the 2 lateral 
teeth produced further back than the middle one. Side-plates 1—4 not so 
deep as in L. hirsutimanus (p. 627). Side-plate 1 (figure) quite clear of side- 
plate 2, which is subequal to 34 or 4; 5th produced a little below 4fk, 
Eyes suborbieular. Antenna 1 almost '/, as long as body; 1° and 24 joints 
equal; flagellum 7-jointed, accessory flagellum not perceived. Antenna 2 
not much shorter, flagellum 3-jointed. Gmathopod 2, 5tt and 6tk joints less 
elongate than in L. hirsutimanus; finger as slender. and acute as, though 
less long than, that of peraeopod 1. Peraeopods 1 and 2, 4!" joint sub- 
quadrate. Peraeopod 3 short, 24 joint oval. Peraeopod 5 much longer than 
preceding peraeopods, but not extremely elongate. Colour tawny, with round 
spots, few but large and conspicuous, of bright reddish brown in tranverse 
bands on the head and segments (1% of peraeon and last 4 of pleon excepted), 
ineluding side-plates and 24 joint of peraeopods 3—5. In other respects 
the species is said to resemble L. hirsutimanus. L. 5 mm. 

Adriatie. 

8. L. trieristatus (Chevreux) 1886 & 87 Ptilocheirus t., Chevreux in: Bull. Soc. 


zool. France, v.11 p.XL; 0.12 p.310 t.5 £.3, 4 | 1888 Leptocheirus t., T. Stebbing in: 
Rep. Voy. Challenger, 0.29 p.1708 | 1894 L.t., G. O. Sars, Crust. Norway, v.1 p. 555. 


a ee er 3 
A er 


630 Leptocheirus, Isaeidae, Isaea 


Body more elongate and side-plates smaller than in L. hirsutimanus, 
pleon segment 4 with 3 medio-dorsal, sharp and strong teeth. Pleon segment 3, 
postero-lateral corners strongly rounded, margin slightly erenulate. Eyes 
small, oval, black. Antenna 1, 2@ joint longer than 1*, 34 scarcely half 
as long as 24; aecessory flagellum 3-jointed. Antenna 2, ultimate joint of 
pedunele shorter than penultimate. Gnathopod 1, 6% joint as long as 5th, 
widening to the finger, which is as long as the palm (im figure: 6! joint oval with 
scarcely defined palm). Gnathopod 2, 24 joint almost as long as 3d—6th 
combined, setae still longer; 4, 5tk and 6th in length equal one to the 
other (in figure: 5tk much longer tham 4% or 6b); finger slightly curved. 
Uropods 1 and 2, peduncle with strong apical spine. Uropod 2, inner ramus 
the longer, with 5 large teeth at the apex. Uropod 3 very short, rami laminar, 
outer with apical setae, inner shorter, with apical tooth. Telson prismatic, 
strongly eoncave above. Colour simply yellow or with dorsal brown bands. 
L. 7 mm. 


France (South-West of Brittany). 


L. pilosus Zadd. 1844 L. p., Zaddach, Syn. Crust. Pruss., p. 8. 
Probably identical with one or other of the species here described. L. 4 mm. 
Baltie. 


35. Fam. Isaeidae 
1853 Subfam. Isaeinae, J. D. Dana in: U. S. expl. Exp., v. 13ır p. 913. 


Side-plate 5 the largest. Antenna 1, accessory flagellum well developed.» 
Gnathopod 2 the larger, subchelate. Peraeopods 1 and 2 .not glandular. 
Peraeopods 1—5 subchelate, 32 — 5% equal. Uropod 3 biramous. Telson simple. 


Marine. 


l genus with 1 species. 


1. Gen. Isaea M.-E. 


1830 Isaea (Sp. un.: T. montagui), H. Milne Edwards in: Ann. Sei. nat., 0.20 
p. 3880 | 1893 I, A. Della Valle in: F. Fl. Neapel, vu 20 p.679 | 1862 I., Iscoea, Bate, 
Cat. Amphip. Brit, Mus., p. 122; t. 22 £.1. 


Body robust. Side-plate 5 as deep as the 4b, Antenna 1 the longer, 
with well developed accessory flagellum. Maxilla 1, outer plate with 11 spines 
. (Della Valle, in figure). Gnathopods 1 and 2 subchelate, 24 stronger. Peraeo- 
pods 1—5, 6% joint distally dilated. Uropod 3 not elongate, rami equal, narrow. 


I species. 


1. I. montagui M.-E. 1830 I. m., H. Milne Edwards in: Ann. Sei. nat., v.20 
p- 380 | 1840 I. m., H. Milne Edwards, Hist. nat. Crust., v.3 p.26 t.29£.11 | 1862 I.m, 
Iscoea montagua, Bate, Cat. Amphip. Brit. Mus., p.122; t.22 f.1 | 1887 Isaea montagui, 
Chevreux in: Bull. Soe. zool. France, v.12 p.301 | 1893 I. m., A. Della Valle in: F. Fl. 
Neapel, ».20 p. 679 t.6 f.7; t.13 £.30--42. 


Head, lateral lobes not strongly produced. Side-plates I—5 rather 
deep. Eyes erimson. Antenna 1, 1% joint a little shorter than 24, 34 about 
”/, as long as 24; flagellum subequal to peduncle, 16-jointed; accessory flagellum 
6-jointed. Antenna 2, ultimate joint of peduncle rather shorter than penultimate 
and than the 8—12-jointed flagellum. Upper lip rounded. Mandible, 


a un 0) un und} ae Sn 


Eee De 


Isaea, Ampithoidae, Ampithoe 631 


34 joint of palp as long as 2%. Maxilla 1, inner plate with pointed apex, 
and no conspieuous seta. Maxilla 2, inner plate fringed. Maxillipeds well 
armed, finger as long as 34 joint. Gmnathopod 1 small, 5" joint as long as 
the oval 6%; finger matching the oblique convex palm. Gnathopod 2, 5th joint 
cup-shaped, 6'% robust, palmar margin rather oblique, divided into 4 teeth; 
finger robust. Peraeopods 1 and 2, 24 joint narrow. Peraeopods 3—5, 24 joint 
well expanded, especially in peraeopod 3. In all peraeopods the dilated 
6% joint has a sort of oblique, serrate palm, set with strong spines, whereby 
these limbs acquire a subchelate character. Uropods 1—3, rami subequal, 
spinose. Uropod 3 the shortest, the slender pointed rami about as long as 
peduncle. Telson shorter than peduncle of uropod 3, its apex rather abruptly 
pointed. Colour reddish yellow, more or less in transverse bands. L:5 mm. 


North-Atlantice and Mediterranean (from Great Britain to the nn On 
Mamaia squinado (Herbst). 


36. Fam. Ampithoidae 
1899 Amphithoidae, T. Stebbing in: Ann. nat. Hist., ser.7 v,4 p. 211. 


Head, lateral lobes not very prominent. Side-plates regular; 4% with 
hind margin not excavate; 5!" with broad front lobe, as deep as 4th (Fig. 109 
p. 642). Antenna 1 with 34 joint short; accessory flagellum wanting or 
small. Lower lip (Fig. 108 p. 636) with front lobes deeply notehed. 
Mandibular palp stout, slender, or wanting; molar usually well developed. 
Mouth-parts otherwise as in Aoridae (p. 585). Gnathopods 1 and 2 not simple, 
24 usually the larger, usually larger in J than in Q and more or less differently 
shaped. Peraeopods 1 and 2 glandular. Peraeopod 3 reverted. Peraeo- 
pod 5 the longest. Uropods 1—3 biramous. Uropod 3 with short rami, 
the outer uncinate. Telson simple (Fig. 110 p. 643). 


Marine. 

6 genera, 22 accepted species and 19 doubtful. 
Synopsis of genera: 

Mandible with palp — 2. 


l H Mandible without palp —- 5. 
Antenna 1 (Fig. 109) without accessory fla- 
2 gellum — 3. 
Antenna 1 with accessory flagellum — 4. 
Peraeopods 3—5, 6th joint not strongly widened 
ee a N N l. Gen. Ampithoe . . . p.631 
Peraeopods 3—5 (Fig. 109), 6th joint strongly wu. 
WIGBBSE BE SDOE een 2. Gen. Pleonexes. . . p.642 
4 { Uropod 3, outer ramus with 2 hooks . . . . 3. Gen. Grubia . - . . p.644 
Uropod 3, outer ramus with 1 hook . . . . 4. Gen. Amphithoides . p. 645 
5 | Mandible, molar well developed... ... . . 5. Gen. Sunamphitoe . p.645 


Mandible, molar evanescentt -.-...... 6. Gen. Biancolina . . p.646 


1. Gen. Ampithoe Leach 


1813/14 Ampithöe (Sp. un.: A. rubricata), Leach in: Edinb. Ene., v.7 p.403, 432 | 
1829 Ampithoe, Latreille in: G. Cuvier, Regne an., n. ed. v.4 p.121 | 1816 Oymadusa 
(Sp. un.: C. filosa), Savigny, M&m. An. s. Vert., v.1 p.109 | 1816 Amphithoe, Latreille 
in: Nouv. Diet., ed.2 v.1 p.470 | 1825 Amphithoe, A. G. Desmarest, Consid. gen. Crust., 


632 Ampithoe 


p- 268 | 1849 Amphithöe, J.D. Dana in: Amer. J. Sci., ser.2 v.8 p.137 | 1862 Amphithoe 
(part.), Bate, Cat. Amphip. Brit. Mus., p.233 | 1888 A., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.1113 | 1893 Amphithoe (part.), A. Della Valle in: F. Fl. Neapel, v. 20 
p. 454 | 1894 Amphithoe, G. O. Sars, Crust. Norway, v.1 p.578 | 1836 Amphitoe, Gu£rin- 
Möneville, Iconogr. Rögne an., v.8 Crust. p.23 | 1840 A. (part.), H. Milne Edwards, _ 
Hist. nat. Crust., v.3 p.28 | 1845 Amphitöe, H. Goodsir in: Ann. nat. Hist., v.15 p.75 | 
1852 Amphitoe, J. D. Dana in: P. Amer. Ac., v.2 p. 213. 


Head without rostrum. Side-plates 1—5 well developed, 5th as wide 
as 4b, with a very small hind lobe. Antenna 1 without accessory flagellum, 
usually longer than antenna 2, though with shorter peduncle. Mouth-parts 
prominent below the head.‘ Upper lip distally rounded. Lower lip (Fig. 108 
p. 636), inner lobes well developed; outer lobes bifid; mandibular processes 
prominent. Mandible normal, prineipal and secondary plate multidentate, 
spines in spine-row numerous, molar of moderate size; 34 joint of palp 
sometimes widened distally and crowded with setae, at others not widened 
and slightly armed. Maxilla 1, inner plate very small, usually with 1—3 
setae, outer plate with 10 spines; 24 joint of palp with several apical spines. 
Maxilla 2, outer plate the larger, inner distally narrowed, inner margin 
fringed. Maxillipeds, outer plates large, well fringed with spine-teeth; palp 
not very elongate. Gnathopod 1 subchelate, usually the smaller. Gnatho- 
pod 2 usually subchelate, stronger in JS than in Q and generally of a 
different sbape. Peraeopods 1 and 2, 24 joint expanded, sometimes greatly, 
for the cement-glands, the secretion from which issues through the apex 
of the finger to supply fibres for constructive purposes. Peraeopods 4 and 5 
longer than the others. Uropod 3, outer ramus carrying 2 reverted spines. 
Telson short, usually or always having the angles of the apex minutely hooked. 


Among algae; occasionally also on floating algae. 


17 accepted species, 14 obseure. 


Synopsis of accepted species: 
Gnathopod 1 in & larger than gnathopod 2. 1. A. megaloprotopus. p. 6383 
Gnathopod 1 in S smaller than gnathopod 2—2. 


Gonathopod 2 in S chelate .. . .. 2... 2. A.lacertosa . . . . p.638 
Gnathopod 2 in & subchelate — 8. 


1 


2 


Peraeopods 1 and 2, character of 2d joint not 
known — 4. 

Peraeopods l-and 2, 24 joint broadly expand- 
ed — 8. 

Peraeopods 1 and 2, 2d joint not broadly ex- 
panded — 11. 


A [ Gnathopod 2 in d, palm oblique — 5. 
Gnathopod 2 in d, palm transverse — 6. 


Gnathopod 2 in 2, palm with tuberele near 

finger- -hinge REBEL a Ne Re 3. A.cinerea. .... p. 684 
Gnathopod 2 in 2, palm with prominence at 

Beiein an ai N  e 4. A.longimana . . . p.634 


Gnathopod 2 in d, palm simply eoncave . . 5. A. quadrimana. . . p.685 


® Gnathopod 2in d, palm margin diversified — 7. 


Gnathopod 2 in d, palm with broad, low, 

median :tonth ars a ag 6: 9. vVande wiss p- 685 
Gnathopod 2 in d, palm with narrow, bifid, 

median toolh.i.. a See 7. A. mitsukurii . . . p.635 


Re 


u a ca 


# 

E 
1 
F 
- 


Ampithoe 633. 


Peraeopods 1.and 2, 2d joint with lower half 


> Berrower Khan upper > ...... = cn.» 8. A. flindersi . . . . p.685 
, Peraeopods 1 and 2, 2d joint with lower half 
not narrower than upper — ®. 
9 Gnathopod 1, 5th joint longer than 6th ... 9. A.humeralis ... . p.636 
Gnathopod 1, 5th joint shorter than 6th — 10. 

10 Gnathopod 2 in S, 6th joint acuminate . . . 10. A. femorata . . . . p.636 
Gnathopod 2 in JS, 6th joint subovate. . . . 11. A. brevipes . . . . p.637 
Gnathopod 1, 6th joint much wider than 5th. 12. A. brasiliensis. . . p.637 

11 | Gnathopod 1, 6th joint not much wider than 

5th — 12. 
Maxilla 1, inner plate with several setae . . 13. A. kergueleni . . . p.688 

12 Maxilla 1, inner plate with 1 seta or very 

few — 13. 

13 Gnathopod 1, 5th joint longer than 6th. . . 14. A.japonica . .. . p.638 

Gnathopod 1, 5th joint shorter than #th — 14. 


defined by a conspieuous tooth . . .. . 15. A. vaillantü . . . . p.63% 
Gnathopod 2 in d, palm not deeply emarginate, 
not defined by a tooth — 15. 


15 Antenna 1, 34 joint not very short... . . 16. A. rubricata . . . . p.639 
Antenna 1, 8d joint very short . . ..... 17... man 2 p- 640 


Gnathopod 2 in d. palm deeply emarginate, 
1 


1. A. megaloprotopus (Stebb.) 1895 Amphithoe m., T. Stebbing in: Ann. 
nat. Hist., ser. 6 v.15 p.397 t.14, 15B. 


Side-plate 1 very large, oblong with rounded angles, produced forward 
so as completely to cover the mouth-parts; side-plate 2 not half as large. 
Eyes rather small, rounded, black (in spirit). Antenna 1, 1° joint strongly 
setose below, 2% much thinner, a little shorter, 34 small; flagellum longer than 
pedunele, with more than 23 joints. Antenna 2, penultimate joint of peduncle 
long. Mandible, 5 or 6 spines in the spine-row, 34 joint of palp nearly as 
long as 24 and 1° combined. Maxilla 1, inner plate with 3 small setae on 
inner margin. Maxillipeds, base very stout. Gnathopod 1, 24 joint narrow, 
channelled in front, with prominent distal lobe, 5?" cup-shaped, short, 6th 
massive, as long as 24, oblong, with rather convex front; palm nearly trans- 
verse, a little concave, sharply defined, a little overlapped by the finger. 
Gnathopod 2 like gnathopod 1, but 6tk joint rather shorter and narrower, 
palm more sinuous, the short, curved finger elosing down within its defining 
point. Peraeopods 1 and 2, 24 joimt narrowly oval. Peraeopods 3 and 4, 
24 joint broad. Peraeopod 5, 24 joint narrower in proportion to length 
than in peraeopods 3 and 4, but only constricted close to distal end. Branchial 
vesicles broadly flask-shaped. Pleopods with 2 coupling-spines, 6 cleft 
spines, rami 17—19-jointed. Uropods 1 and 2 spinose. Uropod 3, rami 
little more than half as long as peduncle, with the usual 2 upturned spines 
on outer ramus. Telson slightly broader than long, with lateral setules, apex 
bluntly triangular between 2 small upturned hooks, with a backward pointing 
seta adjoining each hook on inner side. L. about 11 mm. 


Tropical Atlantie (Antigua). From sea-weed on rocks. 
2. A.lacertosa (Bate) 1858 Amphithoe l., Bate in: Ann. nat. Hist., ser.8 v.1 


p-362 | 1862 A.1., Bate, Cat. Amphip. Brit. Mus., p.236 t.41 £.5 | 1893 A.l., A. Della 
Valle in: F. Fl. Neapel, v.20 p.461 t.57 £. 37. 


634 Ampithoe 


Side-plate 1 very large, extending forward to front of head, 2 much 
smaller. Eyes ovate. Antenna 1 about half as long as body; flagellum 
a little longer than peduncle. Antenna 2 rather shorter, peduncle not 
longer than peduncle of antenna 1. Gnathopod 1, 5% joint slightly dilated, 
longer than 6", 6" not broader than 5t%, ovate, palm oblique, not defined; 
finger short. Gnathopod 2 much larger, 5!" joint short, cup-shaped, 6'h 
large, quadrate, hind margin produced so as to form a kind of thumb, 
though not equalling the finger in length. Peraeopods 1—5, all having the 
dilated base [24 joint] tapering to the distal extremity. Uropod 3 reaching 
beyond the other 2 uropods; peduncle (in figure very much thicker than 
peduncles of uropods 1 and 2 and longer than their rami) with 2 short blunt 
spines on upper margin, and 5 or 6 on upper part of apex; outer ramus 
with 2 strong recurved hooks. Telson acute. L. 21 mm. 


Arctie Seas. 


3. A. cinerea (Hasw.) 1879 Amphithoe ec. (2) + A. grandimanus (non A. grandi- 
‘mana A. Boeck 1861!) (3), Haswell in: P. Linn. Soc. N.S. Wales, v.4 p.269 t. Il f.4; 
p. 270 | 1893 A. rubricata (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 459. 


Eyes round, projeeting, almost colourless. Antenna 1 more than 
half as long as body; 24 joint of peduncle longer than 1%, 34 very short; 
flagellum much longer than peduncle. Antenna 2 shorter; flagellum shorter 
than ultimate and penultimate joints of pedunele. Gnathopod 1, 6! joint 
long ovate, setose, palm oblique, undefined. Gnathopod 2 in S much larger 
than gnathopod 1; 6% joint broad, irregularly ovoid; palm oblique, deeply 
excavated, its border waved, defined posteriorly by a strong tooth. Gnatho- 
pod 2 in oO, 6% joint broader but rather shorter than in gnathopod 1, palm 
oblique, convex, devoid of teeth, but with a tubercle near finger-hinge. 
Peraeopods 1 and 2 subequal, stoutish. Peraeopod 3, 24 joint subeircular. 
Peraeopods 4 and 5, 24 joint oval. Uropod 3 not extending so far as 
uropod 2; outer ramus short, with 2 hooks, inner slightly longer, broader, 
with a few short setae. Telson subtriangular, blunt. Colour ashy grey. 
L. 16 mm. 


Port Jackson [East- Australia]. 


4. A.longimana (S.I. Sm.) 1873 Amphithoö 1., (8. I. Smith in:) A. E. Verrill 
in: Rep.U. S. Fish Comm., v.1 p.563 | 1893 A. rubricata (part.), A. Della Valle in: F. 
Fl. Neapel, ©. 20 p.456. 


Eyes round, black (in spirit). Antenna 1 in J slender, as long as body, 
24 joint rather longer than 1°, 34 about half as long as 24; flagellum about 
twiee as long as peduncle. Antenna 2 stouter, rather shorter; ultimate joint of 
peduncle considerably longer than penultimate, subequal to flagellum. Antenna 2 
in © shorter and more slender. Gnathopods 1 and 2 in J' stout and long. 
Gnathopod 1 im J, 5tk joint as long as 6th, both setose, 6 much more than 
twice as long as broad, oblong; palm very short, transverse, much overlapped 
by stout finger. Gmathopod 2 in C', 5tb joint short, cup-shaped, 6% as long as in 
gnathopod 1, much broader; palm oblique, with deep sinus close to projecting 
defining angle. Gnathopod 1 in oO, 5" and 6*h joints shorter, proportionally 
broader; palm more oblique. Gnathopod 2 in O, 6tk joint short, somewhat 
oval; palm with slight defining prominenee. Peraeopods 4 and 5, 24 joint 
with hind margin unarmed. L. 6—9 mm. 


North-Atlantie (New Jersey, Long Island, Vineyard Sound). 


Ampithoe ES 635 


5. A. quadrimana (Hasw.) 1879 Amphithoe quadrimanus, Haswell in: P. Linn. 
Soe. N.S.Wales, ».4 p.337 t.21 £.7 | 1882 A. q., Haswell, Cat. Austral. Crust., p. 266 | 
1893 A. rubricata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 456. 


Side-plates 1—7 all very shallow, 1% —4th deeper than 5th—7th, 5th not 
larger than 6!" (in figure, but in contradietion to the generic definition by 
Haswell 1882). Eyes small, round. Antenna 1 more than half as long as body; 
flagellum thriee as long as pedunele. Antenna 2 half as long as antenna 1, 
antepenultimate joint of peduncle stout, distally produced below to a rounded 
protuberance; this and ultimate and penultimate joints of peduncle fringed 
below with plumose setae, flagellum as long as peduncle. Mouth-parts pro- 
jeeting downward promimently (in figure). Gnathopod 1, 6% joint subquadrate, 
a little widening distally; palm nearly transverse, not defined. Gnathopod 2, 
4 and 5th joints narrow at apex of hind margin, 6th Jarge, subquadrate, 
twice as long as broad; palm nearly transverse, concave. Uropod 3 reaching 
beyond uropod 2; outer ramus armed with 3 hooks, inner laminar, with 
slender spines. Telson armed with about 6 slender spines. L. 6 mm. 


Port Jackson [East-Australia], 


6. A. valida (S. I. Sm.) 1873 Amphithoe v., (S. I. Smith in:) A. E. Verrill in: 
Rep. U. S. Fish Comm., v.1 p.563 | 1893 A. rubricata (part.?), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 459. 


Eyes round, black (in spirit). Antenna 1 in d, 24 joint little longer 
than 1°, 34 short, slender. Antenna 2 subequal to antenna 1; ultimate and 
penultimate joints of peduncle subequal. Gnathopod 1 in JS short, compressed; 
5th joint as broad as 6tk, 6th broad, oval, palm and hind margin together 
nearly & semicirele; finger fitting palm. Gmathopod 2 in J very large; 
5th joint small, 6 oblong, distally widened, very large and thickened, 
outer surface eonvex, inner flattened; palm transverse, with a broad low 
median tooth, and rounded prominence at the defining angle, within which 
the stout eurved finger eloses. Gmathopod 1 in © slightly more elongated. 
Gnathopod 2 in © smaller than in C; palm slightly oblique. Colour bright 
green. IL. 10-—13 mm. 


North-Atlantie (New Jersey and Long Island Sound). 


7. A. mitsukurii (DellaValle) 189% Amphithoe m., A. Della Valle in: F. Fl, 
Neapel, v.20 p. 460 t.57 f. 30-32. : 


Gmathopod 2 in J, 6th joint very large and long, widened distally; 
palm transverse,: defined by a somewhat produced blunt tooth, and having 
' & little tuberele near the finger-hinge, between which and the defining 
tooth is a bilobed tuberele; finger curved, its apex touching defining tooth 
of palm. Gnathopod 1 (in figure) with produced side-plates; 5 joint very 
broad, longer than the oval 6%. Peraeopods 3—5, 6% joint little dilated 
distally. Telson broader than long, narrowing distally, with ‘almost straight 
apical margin between the uncinate angles. L. 17 mm. 


Tokio [Japan]. 


8. A. flindersi (Stebb.) 1888 Amphitho& f., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1120 t.118 | 1893 A. rubricata (part.), A. Della Valle ig: F. Fl. Neapel, v.20 p.456. 


(Juv.?) Side-plate 1 larger than the 24, below obtusely produced 
forward. Pleon segment 3, postero-lateral corners obtusely quadrate, with 
shallow indent just above the angle. Eyes small, oval in horizontal direetion. 
Antennae 1 and 2 defective. Lower lip (Fig. 108 p. 636), outer branch of bifid 


636 Ampithoe 


lobes advanced in front of the inner. Mandible, 3% joint of palp as long 

as 24, not expanded, with 5 setae (or spines) on apex. Maxilla 1, inner 

plate with 3 setae on inmer margin; 24 joint of palp with 5 spines on the 

dentate apex. Gnathopod 1, 5t" joint rather shorter than 6%, distally lobed, 

6th oblong, a little widened distally, palm oblique, defined by a palmar 

spine, the angle rounded off; finger with fine pectination followed by 5 

successively larger teeth. Gnathopod 2, 5tk joint eup-shaped, 

considerably shorter than 6, which is stouter but not 

longer than in gnathopod 1; palm minutely pectinate; finger 

as in gnathopod 1. Peraeopods 1 and 2, 24 joint broad 

proximally, narrower distally, 4! joint widening distally, 

ae but without rounded lobe. Pleopods with 2 cleft spines, 

Lower ip. With 8 or 9 joints in the rami. Uropod 1, peduncle little 

longer than inner ramus, outer the shorter. Uropod 3 reaching 

beyond the others; peduncle longer than the rami; outer ramus with 2 

short hooked spines, inner oval, slightly longer than the outer, edged with 

4 or 5 spines or spinules. Telson short, almost cireular, with an upturned 
corner on either side of the broadly rounded apex. L. about 4 mm. 


Flinders Passage (lat. 10° S., long. 142° E.). Depth 15 m. 


9. A. humeralis (Stimps.) 1864 Amphithoe h., Stimpson in: P. Ac. Philad., p. 156 | 
1888 A. h., T. Stebbing in: Rep. Voy. Challenger, v.29 p.351 | 1898 A. h., Calman in: 
Ann. N. York. Ac., v.11 p.271 t.33. 3 


Body robust, rather compressed. Head, lateral lobes rounded. Side- 
plate 5 large, subquadrate. Eyes small, rounded, dark. Antenna 1 nearly 
as long as body; flagellum more than twice as long as peduncle (Stimpson). 
Antenna 1 more than half as long as body; 1° and 24 joints subequal, 


34 very small; flagellum 2°/, times as,long as peduncle (Calman). Antenna 2 half - 


as long as body; flagellum not longer than antepenultimate joint (penultimate?) 
of peduncle (Stimpson). Antenna 2 stout; ultimate joint of peduncle a 
little shorter than penultimate; flagellum rather more than 1'/, length of 
pedunele (Calman). Mouth-parts (Calman) nearly as in A. femorata, but 
mandibular palp has 34 joint longer than 24 (not so in figure), not expanded. 
Lower lip with bifid front lobes.. Gnathopods 1 and 2 similar in the two 
sexes, rather slender, and densely setose. Gnathopod 1, 5tk joint longer 
than 6th, 6th oblong, about 2'/, times as long as broad, hind margin with 
shallow distal concavity near angle of very short transverse palm; finger serrate, 
overlapping palm. "Gnathopod 2, 5th joint slightly longer than 6", lobed 
behind, 6t1 hardly more than twice as long as broad, palm short, transverse, 
overlapped by finger. Peraeopods 1 and 2, 24 joint very large, broadly 
oval, 4! widened distally and lobed. Peraeopod 3 very short, 24 joint 
broad. Peraeopod 5 much longer than peraeopod 4. Uropod 3 not reaching 
beyond uropod 2; peduncle thrice as long as rami; outer ramus with 2 hooks, 
inner lamellate, truncate, bearing setae. Telson small, obtusely triangular, 
with a few setae on each side. L. 26—30 mm. 


Puget Sound. About low-water mark. 


10. A. femorata (Kreyer) ?1840 Amphitoe gaudichaudü, H. Milne Edwards, 
Hist. nat. Crust., v.3 p.31 | 1845 Amphithoe femorata, Kreyer in: Naturh. Tidsskr., ser. 2 
v.1p.3351.3£.4a—i | 1893 A. rubricata (part.) + Grubia crassicornis (part.)?, A. Della 
Valle in: F. Fl. Neapel, v.20 p.456; p. 466. 


km 


BEA ya Are KB FE aD un 


& 


Ampithoe 637 


In many respects resembling Sunamphitoe pelagica (p. 645). Body robust, 
dorsally rounded, smooth. Side-plates (or some of them) with setae on lower 
margin. Eyes small, subrotund, whitish. Antenna 1 more than half as long 
as body; 1° joint thick, 24 very little shorter, 3% small; flagellum 30—40- 
jointed. Antenna 2 shorter, stout, almost pediform; ultimate and penultimate 
joints of peduncle equal; flagellum scarcely half as long as peduncle, tapering, 
12- or 13-jointed. Lips not deseribed. Mandibular palp long, thin; 24 joint 
the longest, 34 with apical serrulate setae. Maxilla 1, inner plate with 1 seta, 
outer with 10 spines; palp slender, with 5 or 6 serrate spines. Maxilla 2 
and maxillipeds normal. Gnathopod 1, 5% joint shorter than 6t%, lobed and 
setose on hind margin, 6!" narrowly oblong; palm short, transverse, overlapped 
by finger. Gnathopod 2 in J considerably larger; 6% joint pretty strongly 
tapering. Gnathopod 2 in © like gnathopod 1, but with shorter 5th and 
broader 6! joint. Peraeopods 1 and 2, 24 joint broad, oval, laminar, 4th 
widened distally. Peraeopod 3 stout, 24 joint broader than long, the following 
joints stout, not widened, 6!" spinose on both margins; finger short, strong, 
much curved. Peraeopod 4 longer and more slender, 24 joint long oval, 
finger fitted for grasping. Peraeopod 5 slightly longer than peraeopod 4. 
Branchial vesicles oval. Marsupial plates narrow, long, with long setae. 
Pleopods, rami long, 30-jointed. Uropods 1 and 2, outer ramus shorter 
than inner, broader, and more spinose, inner of uropod 2 at least as long 
as pedunele, the rest shorter. Uropod 3 shorter but stouter than uropod 2; 
peduncle twice as long as rami; outer ramus with the usual 2 hooks, and several 
rows of microscopie spinules, inner rather shorter but broader, nearly circular, 
armed with some setae and 2 little stout spines. Telson small, triangular, 
with 2 setae on the margin. Colour in life a very dark olive-green. L. 
reaching 19 mm. 

South-Paeifie (Valparaiso near the shore); Atlantic (Brazil)? 


11. A.brevipes (Dana) 1852 Amphithoe b., J.D.Dana in: P. Amer. Ac., v.2 p.216 | 
1853 & 55 A.b.+?A. peregrina (juv.), J. D. Dana in: U. S. expl. Exp., v. 1311 p. 936, 
941; t. 64 f.5a—n; p. 940 t. 64 f.4a, Ab. | 1862 A. falklandi (juv.?) + A.p. + A. b., Bate, 


Cat. Amphip. Brit. Mus., p.237 t.41 £.6; p.247 t.43 f.1; p.248 t.43 f.2,2i,2u, lu | 


1893 A. rubricata (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 456, 459. 

Apparently very near to A. femorata. Head, lateral lobes very 
little produced. Side-plate 1 scarcely produced forward, 5tk the largest. 
Eyes round. Antenna 1 about half as long as body; 1° joint longest; 
flagellum more than twice as long as peduncle. Antenna 2 much shorter, 
ultimate and penultimate joints of peduncle equal; flagellum 15-jointed. 
Mandibular palp rather slender; 34 joint with 5 apical setae. Gnathopod 1, 
5th joint shorter than 6*h, 6th oblong; palm short, transverse; finger longer 
than palm. Gnathopod 2 in JS, 5th joint small, eup-shaped, 6b large, sub- 
ovate, narrowest at finger-hinge, near to which there is a minute acute 
tooth; the palm in general being undistinguished from the hind margin, 
finger long. Gnathopod 2 in © scarcely distinguishable from gnathopod 1. 
Peraeopods 1 and 2, 24 joint dilated, 4 joint distally lobed. Peraeopods 4 
and 5 considerably longer than peraeopod 3. Uropod 3 normal, reaching 
beyond uropod 2. Telson not described. L. 18 mm. 

South-Atlantie (Tierra del Fuego, depth 9m; Falkland Islands); South-Paeifie 
(Valparaiso)? 

12. A. brasiliensis (Dana) 1853 & 55 Amphithoe b., J. D. Dana in: U. S. expl. 
Exp., v. 13m p.943; 1.64 £.6a—n | 1893 A. rubricata (part.), A. Della Valle in: F. Fl. 
Neapel, v.20 p. 456. 


638 Ampithoe 


Body compressed. Side-plates large. Antenna 1 much longer than 
half body; flagellum very long, slender. Antenna 2 a little shorter, hirsute; 
peduncle hardly shorter than flagellum. Gnathopod 1, 5t& joint (in figure) 
shorter and much narrower than 6'", 6tk with front margin slightly convex, hind 
margin and palm (described as oblique-transverse) together making (in figure) a 
great bulge without any defining mark; finger half as long as 6!" joint. Gmatho- 
pod 2 not much larger, more hirsute, 5!" joint distally eup-shaped, 6!" oblique- 
transverse at apex; palm hardly excavate, long hirsute, acute at lower limit 
(in figure: widening to a slightly oblique, well defined palm, which is very 
different in appearance from that of gnathopod 1). The mouth-parts and 
uropod 3 as figured are fairly appropriate to Ampithoe. Maxilla 1 shows 
no inner plate, but a tuft of 5 setae at the place proper to the inner plate. 
L. 16 mm. 


Tropical Atlantie (Rio Janeiro). 


13. A. kergueleni (Stebb.) 1888 Amphithoe k., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.1116 t.117 | 1893 A. rubricata (part.)?, A. Della Valle in: F. Fl. 
Neapel, v.20 p. 463. 


9. Side-plate 1 much widened below. Pleon segment 3, postero- 
lateral corners obtusely quadrate. General structure in close agreement with 
A. rubrieata. Eyes rounded oval. Antenna 1, 24 joint rather longer than 
1st, 34 more than /, as long as 24; flagellum much longer than peduncle, 
33-jointed. Antenna 2 shorter, ultimate joint of peduncle rather shorter 
than penultimate; flagellum 20-jointed. Lower lip, front lobes bifid but less 
sharply than in the European species. Maxilla 1, inner plate with many 
plumose setae on inner margin; 24 joint of palp with 9 spine-teeth round 
the apex. Gnathopod 1, 5th joint elongate, nearly as long as 6t, 6tk oblong, 
widening slightly towards the rather oblique, finely pectinate palm, which 
has a palmar spine at the rounded defining angle; finger overlapping palm, 
its inner margin cut into 14 teeth. Gmathopod 2, 5% joint much shorter 
than 6*", distally cup-shaped, 6"% rather broadly oblong; palm oblique, concave, 
well defined; finger when touching the defining angle not closing the space 
between its dentate margin and the palm. Other appendages nearly as in 
A. rubricata. Telson broader than long, narrowing to apex, which forms an 
almost straight border between the acute corners. L. about 6 mm. — Cd 
unknown. 


Southern Indian Ocean (Kerguelen Island). 


14. A. japonica (Stebb.) 1888 Amphithoej., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1124 t.138A | 1893 A. rubricata (part.), A. Della Valle in: F. Fl. Neapel, 0.20 p.456. 

Q. Eyes small, irregularly round. Antenna 2, 24 joint longer than 1%, 
34 about '/, as long as 24, carıying a little setuliferous (seemingly jointed) 
tubercle; flagellum much longer than peduncle, attaining to 46 joints. Antenna 2, 
ultimate joint of pedunele rather shorter than penultimate; flagellum longer 
than both combined, 25-jointed. Mouth-parts as in A. rubricata. Gnatho- 
pod 1, 5th joint twiee as long as broad, rather longer than 6%, 6th oblong 
oval, palm oblique, defined by a palmar spine at the rounded defining angle; 
finger serrate, a little overlapping the palm. Gmnathopod 2, 5tk joint cup- 
shaped, shorter but distally rather wider than the 6, 6th oblong, with a 
convex palm, very slightly oblique, nearly matched by the finger, the apex 
of which scarcely overlaps it. Peraeopods 1 and 2, 24 joint long, not greatly 
widened. Peraeopod 3, 24 joint as broad as long, 6t% spinose, its apex on 


| 
} 
h 


a a Sn Ei 


Ampithoe 639 


the inner side forming 2 small laminar projeetions. Peraeopod 5, 24 joint piri- 
form. Pleopod 1 having on peduncle about a dozen coupling spines, on 18 joint 
of inner ramus 9 eleft spines; outer ramus with 22 joints, inner with 23. 
Uropods 1 and 2 spinose, . peduncle longer than rami. Uropod 3, peduncle 
much longer than rami, spinose; inner ramus with several spines on margins 
and some small stout surface spines. Telson scarcely longer than broad, 
with denticle at each angle of the convex distal margin. L. 14 mm. — 
Ö unknown. 


Bay of Kob& [Japan]. Depth 15 m. 


15. A. vaillantii (H.Lue.) 1846 Amphithoe v., H. Lucas in: Expl. Algerie, An.artie. 
v.1 p.54 Orust. t.5 £.3 | 1857 A. penicillata, A. Costa in: Mem. Acc. Napoli, v.1 p. 207 
t.2 £.9 | 1866 A.p., Cam. Heller in: Denk. Ak. Wien, v.26n p.48 t.8 f. 29—84 | 1876 
A.p., Catta in: Ann. Sci. nat., ser. 6 v.3 nr.1 p.27 t.2 f.2i | 1881 A.p., Nebeski in: 
Arb. Inst. Wien, ©.3 p.149 t.13 f.42d | 1862 A. desmarestü, Bate, Cat. Amphip. Brit. 
Mus., p.238 t.41 f.8 | ?1868 A. vaillantii var. pontica, Czerniavski in: Syezda Russ. 
Est., Syezda 1 Zool. p.102 t.7 £.19—27 | ?1880 A. erythraea, Kossmann, Reise Roth. 
Meer., v.2ı Malacost. p.134 t.14 f.12,13 | 1893 A. rubricata (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 456. 


Antennae 1 and 2 equal, setose (Lucas). Antenna 1 in J longer than 
antenna 2; 1° joint scarcely longer than 24, 34 a third as long as 1%; 
flagellum twice as long as peduncle, 20—30-jointed. Antenna 2, peduncle 
long, stout; flagellum short, 18-jointed. Eyes small, rounded, deep brown. 
Gnathopod 1 elongate, 24 joint distally lobed, 5tk joint distally quadrate, 
6th Jonger, setose, oblong; palm straight (Lucas), very short, slightly excavate 
(Czerniavski), finger long. Gnathopod 2 very long, 24 joint strongly lobed 
distally; 6% joint with palm deeply emarginate, defined by a conspieuous 
tooth, the front much longer than the hind margin and (Lucas’ figure) bluntly 
produced beyond base of the comparatively short, strongly curved, serrate 
finger (Czerniavski figures a much shorter palm of gnathopod 2 in J, and 
adds, that in Q gnathopod 1 has the 5t% joint short, palm of 6th not convex, 
and gnathopod 2 has a broader 5tk joint, the 6b not elongate, nor apically 
produced). Peraeopods I—5 and uropods 1—3 in agreement with A. rubri- 
cata. Telson obtusely triangular. Colour yellow, punetate with green or 
dark spots. L. 12—17 (Lucas), 8—10 mm (Czerniavski). 


Mediterranean (Algeria, under cast-up algae); Black Sea?, Red Sea? 


16. A. rubricata (Mont.) 1808 Cancer (Gammarus) rubricatus, Montagu in: 
Tr. Linn. Soe. London, v.9 p.99 t.5 f.1 | 1812 Astacus r., Pennant, Brit. Zool., ed.5 
v.4 p.33 | 1813/14 Ampithöe rubricata, Leach in: Edinb. Enc., v.7 p.403, 432 | 1874 
Amphithöe r., T. Stebbing in: Ann. nat. Hist., ser.4 v.14 p.113 t.11 f.2,2a | 1893 
A.r. (part.), A. Della Valle in: F. Fl. Neapel, 0.20 p.456 t.2 £.2; t.13 £. 1-17; t.57 
£.25,26 | 1894 A.r., T. Stebbing in: Bijdr. Dierk., 0.17 p.44 | 1894 A. r., G. O. Sars, 
Crust. Norway, v.1 p.579 t.206 | 1827 &28 Gammarus punctatus (non Amphithoe punctata 
Say 1818!), G. Johnston in: Zool. J., 0.8 p.177,490 | ?1837 Amphitho& picta, H. Rathke 
in: Möm. pres. Ac. St.-Pötersb., v.3 p. 379 t.5 £.15—19 | 1840 „Amphitoe rouge“, 
H. Milne Edwards, Hist. nat. Crust., v.8 p.33 | 1843 Amphithoe podoceroides, H. Rathke 
in: N. Acta Ac. Leop., v.201 p.79 t.4 f.4 | 1876 A.p., A. Boeck, Skand. Arkt. Amphip., 
v.2 p.588 t.26 f.5; t.27 f.3 | 1846 A. albomaculata, Kroyer in: Naturh. Tids- 
skr., ser.2 v.2 p.67 | 1846 A.a., Kroyer in: Voy. Nord, Urust. t.11B f. la—u | 1857 
Amphitoe littorina, Bate in: Ann. nat. Hist., ser.2 v.19 p.147 | 1862 Amphitho& rubri- 
cata + A.1. + Sunamphitho& podoceroides, Bate, Cat. Amphip. Brit. Mus., p. 233 t.41 
f.1; p. 234 t.41 f.2; p.251 t.43 £.7. 


640 Ampithoe 


Body long, eompressed, but not always slender. Head, lateral lobes 
blunt. Side-plate 1 bluntly produced somewhat forward, 22—5tk rotundo- 
quadrate below. Pleon segment 3, postero-lateral eorners obtusely quadrate. 
Eyes small, rounded oval, dark red. Antenna 1, 1° and 24 joints subequal, 
34 Jess than half as long as 24; flagellum slender in O , sometimes twice as long as 
peduncle, but in S sometimes not longer than pedunele, 23— 35-jointed. 
Antenna 2 stout, in Q decidedly shorter than antenna 1, but less so in 3; 
ultimate joint of peduncle as long as penultimate; flagellum about half as long as 
peduncle in Q, less than that in JS, 9—15-jointed. Lower lip, outer part 
of bifid lobe distally rounded. Mandible, 34 joint of palp longer than 24, 
widening distally and densely beset with setae on apex and distal part of 
inner margin. Gmathopod 1, 24 joint lobed at apex of channelled front, 
5th a little shorter than 6%, 6th oblong oval, palm oblique, finger rather 
longer than palm, serrulate. Gnathopod 2 in JS, 5tk joint much shorter 
than the large 6%, which has the palm more or less excavate, defined by 
a small but distinet tooth, within which the eurved finger impinges. Gnatho- 
pod 2 in 9 like gnathopod 1, but with wider 5tk and 6tk joints. Peraeo- 
pods 1 and 2, 24 joint narrowly oval, 4t# distally widened but not apically 
lobed. Peraeopod 3, 24 joint broader than long. Peraeopods 4 and 5, 24 joint 
oblong oval, not much expanded. Peraeopods 3—5, 6tk joint not narrowing 
distally, with tuft of setae at back of apex; finger up-curved. Uropods 1 and 2 
spinose, in uropod 1 peduncle longer than rami. Uropod 3, peduncle twice 
as long as rami, with transverse row of spines on apical margin; outer 
ramus with 2 strong hooks, inner rather narrower with 2 lateral spines, 

. 1 apical, and several setae. Telson as broad as long, apex rounded, between 
2 little tubercles, within which are 3 setules on either side. Colour rather 
variable, from red to green, with dark stellate markings, often with white 
spots along middle of back. It forms a dwelling by knitting together various 
fragments, the cement-fibres apparently supplied from the glandcells of 
peraeopods 1 and 2. L. reaching 20 mm. 


North-Atlantie with adjoining seas (Europe). Among algae between tide-marks, 
and at small depths. 


17. A.inda (M.-E.) 1830 Amphithoe i., H. Milne Edwards in: Ann. Sei. nat., : 
v.20 p.376 | 1840 Amphitoe indica, H. Milne Edwards, Hist. nat. Crust., v.3 p.31 | 1888 
Amphithoe i., G.M. Giles in: J. Asiat. Soc. Bengal, v.57 p.240 t. 10 £.1—7 | ?1852 
A. rubella, J.D. Dana in: P. Amer. Ac., v.2 p.215 | 1853 &55 A. r., J. D. Dana 
in: U.S. expl. Exp., e. 1311 p. 986; t.64 f.1 a—d | 1862 A. indica + A. r., Bate, Cat. 
Amphip. Brit. Mus., p.240 t.42 f.3; p.246 t.42 f.8 | 1893 A. rubricata (part.)?, A. inda, 
A. Della Valle in: F. Fl. Neapel, v.20 p.459, 463. 


Body rather stout. Side-plates 1—5 broad. Pleon segment 3, postero- 
lateral corners subquadrate. Antennae 1 and 2 equal, or antenna 1 rather 
the longer. Antenna 1 more than '/, as long as body; 24 joint nearly as 
long as 1°, 34 very small; flagellum with 13 or 14 short joints. Antenna 2, 
ultimate joint of peduncle a little longer than penultimate, flagellum with 
9—11 short joints. Mandibular palp small. Gnathopod 1 small, 5tk joint 
shorter than ‚6%, 6tk oblong, narrow, narrower at apex; finger longer than ° 
palm. Gnathopod 2, 6tk joint stout, broad, subrecetangular; palm transverse, 
little excavate and unevenly so, defining angle prominent and acute but 
not produced; finger moderately large and somewhat serrate. Peraeopods 1 
and 2, 24 joint not much widened. Peraeopod 3, 24 joint broad. Peraeo- 
pods 4 and 5 much longer, with 24 joint somewhat less broad. Peraeo- 


Dr" cs vn 


u ILL u 


Ampithoe 641 


ods 3-5, distal end of 6th joint with 2 blunt spines, including between 
em a rounded depression, and suited to subserve the guiding of a thread 
(Giles). Uropods 1—3 normal, reaching back about the same distance; 
inner ramus of uropod 3 with 1 spine and a few setules. Telson small, 
laminar, somewhat upturned, and of a roundedly conical outline (Giles), 
triangular (Milne Edwards). Colour purple, with patches of golden-yellow. 


'L. 5—6 mm. 


Indian Ocean; Middle of Bay of Bengal, on drift; ?Sooloo Sea, depth 12 m. 
A. australiensis (Bate) 1862 Amphithoe a., Bate, Cat. Amphip. Brit. Mus., 
p. 287 t.41 f.7 | 1893 A. rubricata (part.), A. Dells Valle in: F. FI. Neapel, v.20 p.456. 

L. 12 mm. 

Southern Indian Ocean (South-Australia). 

A. brusinae (Heller) 1866 Amphithoe b., Cam. Heller in: Denk. Ak. Wien, v.2611 
p-44 t.4 f.2,3 | 1893 A. rubricata (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p.459. 

L. 5 mm! 

Adriatie (Lissa). 

A. chilensis (Nie.) 1849 Amphitoe e., H. Nieolet in: Gay, Hist. Chile, v. 3 
9.235 Crust. t.2 f.5a—d | 1893 Amphithoe e., A. Della Valle in: F. Fl. Neapel, 0.20 p.463. 

L. 16 mm. | 

Pacifie (Chili). 

A.filieornis (Dana) 1853 &55 Amphithoe f., J.D. Dana in: U.S. expl. Exp., v.13ır 
p.944; 1.65 f.1a—g | 1893 A. rubricata (part.), A. DellaValle in: F. Fl. Neapel, v.20 p.456. 

Tropical Atlantic (Rio Janeiro). 

A.filigera (Stimps.) 1855 Amphithoe f., Stimpson in: P. Ae. Philad., v.7 p.382 | 
1893 Grubia crassieornis (part.)?, A. Della Valle in: F. Fl. Neapel, v.20. p. 467. 

L. 12 mm. 

“ North-Paeifie (Loo Choo). 
A. filosa (Sav.) 1816 Cymadusa f., Savigny, Mm. An. s. Vert., v.1 p.51,109; 


t.4 f.la,b,e,i,o,w| 1826 Amphitho& f., Audouin in: Deser. Egypte, v.lıv p.93 Crust. 
t.11 f.4,?5 | 1893 Grubia crassicornis (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p.466. 


Only figured; no description. 

Mediterranean or Red Sea? (Egypt). 

A. maculata (Stimps.) 1853 Amphithoe m., Stimpson in: Smithson. Contr., v.6 
nr.5 p.58 | 1893 A. rubricata (part.)? A. Della Valle in: F. Fl. Neapel, v.20 p. 489. 

L. 16 mm. 

Fundy Bay (Grand Manan). On rocky bottoms in laminarian zone and at low water, 

A. orientalis (Dana) 1853 & 55 Amphithoe o., J. D. Dana in: U.S. expl. Exp., 
».13u p. 937; t: 64 f.2a—f (3f on plate). 

I: 5-6 mm. 

Bay of Manila [Philippine Islands]. From floating kelp. 

A. pausilipae (M.-E.) 1830 Amphithoe p., H. Milne Edwards in: Ann. Sei, nat., 
©.20 p. 876 | 1840 Amphitoe pausilipii, H. Milne Edwards, Hist. nat. Crust., v.3 p.30 | 
1851 Amphithoe graeilis, (A. Costa in:) F.W. Hope, Cat. Crost. Ital., p.45 | 1857 A.g.+ 


A. pausylipi, A. pausilippüi, A. Costa in: Mem. Ace. Napoli, v.1 p.208 t.3 f.4; p. 206 | 
1893 Grubia erassicorhnis (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 466, 467. 


Bay of Naples. | 
Das Tierreich. 21. Lief.: T.R.R. Stebbing, Amphipoda I. 41 


642 Ampithoe, Pleonexes 


A. punctata Say 1818 A. p., Say in: J. Ac. Philad., v.1ı p.383 | 1640 Am- 
phitoe p., H. Milne Edwards, Hist. nat. Crust., v.5 p.35 | 1893 Amphithoe? p., A. Della 
Valle in: F. Fl. Neapel, v.20 p. 464. 


Egg Harbour [United States of America.] 
A.ramondi (Aud.) 1826 Amphitho&r., Audouin in: Deser. Egypte, v.lıv p.98 


Crust. t.11 £.6 | 1893 Grubia crassicornis (part.)?, A. Della Valle in: F. Fl. Neapel, 
v.20 p. 466. 

Mediterranean or Red Sea? (Egypt). 

A.stimpsoni (Boeck) 1872 Amphithoe s., A. Boeck in: Forh. Selsk. Christian., 
1871 p.48, 49 t.1 £.5 | 1893 A. rubricata (part.)?, A. Della Valle in: F. Fl. Neapel, 
v.20 p: 489. 


Resembling A. japonica (p. 638), but antenna 1, 2d joint shorter than 1st, and 
gnathopod 1 with 5th joint shorter than 6th. L. 13 mm. 5; : 


San Franeiseo. 
A. tongensis (Dana) 1852 Amphitoe t., J. D. Dana in: P. Amer. Ae., v2 


p-216 | 1853 & 55 Amphithoe t., J. D. Dana in: U. S. expl. Exp., v. 1311 p.939; t. 64 
f.83a—c | 1893 Grubia crassicornis (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p.467. 


L. 12 mm. 

Tropical Pacifie (Tongatabu). Along the shores of coral islets, in shallow water, 
among sea-weed. 

A.sp., (Bate & Westw.) 1862 Amphitho& albomaculata (err., non Kroyer 1846!), 
Bate & Westwood, Brit. sess. Crust., v.1 p.426 £. 

North-Atlantic (East of the Shetland Islands). Depth 128—164 m. 


2. Gen. Pleonexes Bate 


1836 Anisopus (Sp. un.: A. dubius) (non Meigen 1803, Diptera!), R. Templeton 
in: Tr. ent. Soc, London, v.1 p.185 | 1856 Pleonexes (nom. nud.), Bate in: Rep. Brit. 
Ass., Meet. 25 p.59 | 1857 P. (Sp. un.: P. gammaroides), Bate in: Ann. nat. Hist., ser. 2 
v.19 p.147 | 1894 P., G. O. Sars, Crust. Norway, v.1 p. 581. 

Like Ampithoe (p. 631), except that in peraeopods 3—5 the 6 joint 
is subchelately widened at the apex (Fig. 109). Front lobes of lower lip 

bifid. Mandibular 


we palp narrow, 34 
[7 Joint setose only 
© ADIER atapex. Peraeo- 
Yo ® pods 1 and 2 have 

NAT) Eh BERLIN the 24 jointrather 

SIT \ N «N N broadly oval. 

) ) \\ 1 accepted spe- 

In cies, 3 doubt£ul. 


1. P. gamma- 
roides Bate 1856 


D ? P.g. (nom. nud.), 
Ga Bate in: Rep. Brit. 
Be Ass., Meet.25 p.59| 


1857 P.g., Bate in: 
Ann. nat. Hist., 
ser.2 v.19 p.147 | 
1894 P.g., G.O.Sars, Crust. Norway, v.1 p.582 t.207 | 1862 Amphithoe g., A. gammeroides, 
Bate, Cat. Amphip. Brit. Mus., p.235 t.41 f.4 | 1874 Sunamphitho& gammaroides, T. 
Stebbing in: Ann.nat. Hist., ser.4 v.14 p.114 t.11, 12 £.8,3a—f | 1866 Amphitho& bieuspis 


Fig. 109. P. gammaroides, Q. 
Lateral view. [After G. O. Sars.] 


Se N 


Ye aut a a Ze Be a a A ee ir 


Pleonexes 643 
(err., non Kröyer 1838!), Cam. Heller in: Denk. Ak. Wien, 0.2611 p.44 t.4 f.1 | 1881 
A.b., Nebeski in: Arb. Inst. Wien, v.3 p.149 t.13 f.42f | 1898 A. gammaroides + A.b., 
A. Della Valle in: F. Fl. Neapel, v.20 p.462 t.57 £.36; p.461 t.57 f.33—85 | 1871 
Sunamphitho& hamulus (err., non Bate 1887!) + 8. longicornis, A. Boeck in: Forh. 
Selsk. Christian., 1870 p.245 | 1876 $8.h. + 8. 1., A. Boeck, Skand. Arkt. Amphip., v.2 
p- 594 t.27 f.1; p.596 t.27 f.2. 

Body (Fig. 109) smooth, compressed. Head tending to bend a little 
downward, lateral lobes rounded. Side-plates not very deep, 1° a little 
produced forward, 5tk the largest. Pleon segment 3, postero-lateral corners 
obtusely quadrate. Eyes small, round, red. Antenna 1 variable, longer or 
shorter than antenna 2; 1° joint larger than 2, 34 Jess than half as long as 24; 
flagellum 15-jointed. Antenna 2, ultimate and penultimate joints of peduncle 
subequal; flagellum about 10-jointed. Lower lip with outer branch of bifid 
lobes produced beyond the inner (Sars: inner lobe obsolete).. Mandible, 
spines in spine-row 8 or 9; 34 joint of palp slightly longer and not broader 
than 24, Gmathopod 1, 24 joint with distal lobe, 5" not 
longer than broad, 6 oblong oval; palm slightly oblique, 
finger matching it. Gmathopod 2 in J, 5tk joint short, 
broad, cup-shaped, 6! large, quadrate; palm oblique, strongly 


sinuous diversely on 2 edges; finger serrulate, strongly 


Uropod 3 


arched, touching defining point of palm (Sars describes Fig. 110. 
palm as somewhat flexuous and defined by a distinet angle). 2: gammaroides. 
ropod3and telson, 


Gnathopod 2 in oO differing from gnathopod 1 by having [after G. 0. Sars.] 
the 6" joint much larger, oval quadrate, palm oblique, 

almost straight. Peraeopods 1 and 2, 24 joint rather broadiy oval, 4tk 
longer than broad. Peraeopod 3, 24 joint scarcely so broad as long. Peraeo- 
pods 4 and 5, 24 joint long oval. 'Peraeopods 3—5, 6th joint distally expanded, 
fitting into eavity of upturned finger towards which spines project planted within 
the rounded apical lobe of the 6!% joint; one of the spines curved. Uropods 1—3, 
pedunele longer than rami. Uropod 3 (Fig. 110), outer ramus with 2 upturned 
spines; inner laminar with several setae. Telson (Fig. 110) not longer than 
broad, with a small subapical hook on either side of a convex apex (Sars: 
terminating in 2 juxtaposed, very strong, hooked projections; in figure longer 
than broad, with a very narrow, slightly ineised apex). Colour bright yellowish 
green, with scattered black dots or stellate markings. L. 6—7 mm. 

North-Atlantie with adjoining seas (Norway, Great Britain, France, Azores). 


P. dubius (R. Templ.) 1836 Anisopus d., R. Templeton in: Tr. ent. Soe. London, 
v.1 p.185 t.20 f.1 | 1862 Amphitho& dubia, Bate, Cat. Amphip. Brit. Mus., p. 245 t. 42 
f.7 | 1893 A.d., A. Della Valle in: F. Fl. Neapel, v.20 p.464 | 1888 Sunamphithoe d., 
T. Stebbing in: "Bep, Voy. Challenger, v.29 p. 167. 

L. about 4 mm. 

Tropical Indian Ocean (Mauritius)? 


P. validus (COzern.) 1868 Sunamphithoö valida, Ozerniavski in: Syezda Russ. 
Est., Syezda 1 Zool. p. 101 t. 6 f. 36 | 1898 Amphithoe? v., A. Della Valle in: F. Fl. 
Neapel, v.20 p. 464. 

Perhaps identical with P. gammaroides. L. about 6 mm. 

Black Sea. 


P. virescens (Stimps.) 1853 Amphithoe v., Stimpson in: Smithson. Contr., v.6 
nr. 5 p.53 | 1862 Amphitho& punctata (part.), Bate, Cat. Amphip. Brit. Mus., p. 241 | 1893 
Grubia crassicornis (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 467. 
L. 11 mm. 
Fundy Bay (Grand Manan). 
41* 


644 Grubia 


3. Gen. Grubia Üzern. 


1868 Grubia (Sp. un.: @. taurica), Czerniavski in: Syezda Russ. Est., Syezda 1 
Zool. p. 103 | 1888 @., T. Stebbing in: Rep. Voy. Challenger, v. 29 p. 377 | 1893 @., 
A. Della Valle in: F. Fl. Neapel, v.20 p. 464. 


Like Ampithoe (p.631), except as follows. Antenna 1 has a 1-jointed 
accessory flagellnm, antenna 2 an elongate flagellum. Mandible, the 34 joint 
of the slender palp not distally expanded. Maxilla 1, the inner plate with 
3 small lateral setae, Peraeopod 3 with the 24 joint longer than broad. 


1 accepted speeies, } imperfeetly described. 


1. G. erassicornis (A. Costa) 1857 Amphithoe ec. + 4. elongata, A. Costa in: 
Mem. Ace. Napoli, v.1 p.206 t.3 f.la—d; p.209 t.3 f.5 | 1893 Grubia e., A. Della 
Valle in: F. Fl. Neapel, ®. 20 p. 464, 918; t.2 f.12; t. 13 f£.18, 29 | 1866 Podocerus 
largimanus + P.longicornis, Cam. Heller in: Denk. Ak. Wien, v.2611 p.46 t.4 f.6; p.47 
t.4 f.7 | 1881 Amphitho& largimana + A. longicornis, Nebeski in: Arb. Inst. Wien, v.3 
p.150 t.13 f. 42c, 42b | 1868 Grubia taurica, Czerniavski in: Syezda Russ. Est., Syezda I 
Zool. p. 103 t.8 f. 1—10| 1888 @. t., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 377 | 
1875 @. taurica var. massiliensis, Catta in: Rev. Sei. nat., v.4 p. 165. 


Body rather robust. Head, lateral lobes little prominent. Side-plate 1 
little produced forward, 24—5!% somewhat rounded below. Pleon segment 3, 
postero-lateral corners subquadrate, with small point distinet from margin. 
above. Eyes small, rounded, red with scattered points of white. Antenna 1 
as long as body; 1° and 24 joints long, equal, 34 about !/, of 24; flagellum 
29—50-jointed; aeccessory flagellum searcely half as long as 1° joint of 
primary, but slender, distinet. Antenna 2 slender, °/, as long as antenna 1 
or more; ultimate and penultimate joints of peduncle equal; flagellum with 
23—30 joints, sometimes as long as peduncle. Mandible, 34 joint of palp 
set with pectinate spines, but not densely. Maxilla I, 24 joint of palp with 
8 small spines round apex and part of inner margin; outer plate with 10 apical 
spines. Gnathopod 1, 5th joint nearly as long as 6, distally squared, 6% 
oval, palm only defined by a palmar spine, which is crossed by tip of 
faintly serrate finger. Gnathopod 2 in d, 5tk joint short, cup-shaped, 6 
oblong oval, the palm strongly sinuous, scarcely (to strongly) defined from 
the straight hind margin; the finger overlapping the palmar margin and 
elosing on to the surface of the joint. Gnathopod 2 in © similar to gnatho- 
pod 1, but with. shorter 5t" and enlarged 6tk joint. Peraeopods 1 and 2, 
24 joint narrowly oval, and others as in Ampithoe rubricata (p: 639). Peraeo- 
pods 3—5, 24 joint narrowing distally, suecessively longer and narrower, 
4th _6th joints rather long and narrow. Pleopods with 2 coupling spines. 
Uropods 1—3 nearly as in Ampithoe rubricata. Uropod 3, outer ramus the 
shorter, hinder reverted spine the shorter; the oval mner ramus beset with 
slender spines and 1 rather stout one. Telson nearly as broad as long; 
sides converging to the 2 reverted points; apex projecting a little between 
these, obtuse angled. Colour yellowish green with red spots. L. 6—12 mm. 


Mediterranean, Black Sea. 


G. setosa (Hasw.) 1879 Amphitho& s., Haswell in: P. Linn. Soe. N.S.Wales, 
v.& p.270 | 1885: Amphithoe s., Chilton in: P. Linn. Soe: N.S.Wales, vu. 9 p. 1040 | 1893 
A. rubricata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 456. 


Antenna 1 with a very short accessory flagellum. 
- South-Paeifie (Botany Bay, rock-pools; Sydney Harbour). 


De er Tag 


u ee u 
Br ge 


Amphithoides, Sunamphitoe 645 


4. Gen. Amphithoides Kossm. 
1880 Amphithoides (Sp. un.: A. longicornis), Kossmann, Reise Roth. Meer., v. 21 


"Malaeost. p.135 | 1888 A., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 516, 517. 


Like Ampithoe (p. 631), except that antenna 1 has an accessory 
flagellum, uropod 3 has only 1 well developed hook on the outer ramus, 
and the telson is flat, unarmed. 


l species accepted, 1 doubtful. 


1. A. longicornis Kossm. 1880 A. I., Kossmann, Reise Roth. Meer, v. 21 
Malacost. p. 135 | 1893 Grubia cerassicornis (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p.464. 

O. S$ide-plates as in Ampithoe (p. 631). Antenna 1 as long as body; 
22 joint rather longer than 1%, 34 much shorter; flagellum 23-jointed; 
accessory flagellum 2-jointed, shorter than 1° joint of primary. Antenna 2, 
24 and 34 joints of pedunele [? ultimate and penultimate] very long; 


flagellum 17-jointed. Gnathopods 1 and 2 almost exactly alike in shape 


and size, but 5tk joint rather longer and more slender in gnathopod 1, and 
the palm defined by a palmar spine only in gnathopod 2; 6 joint in both 
widening to the convex palm, finger faintly serrate. Marsupial plates broad. 
Uropod 3, 24 hook of outer ramus indicated by a scarcely visible blunt 
tuberele. L. 4 mm. 


Red Sea. 


A. comptus (S.1.Sm.) 1873 Amphithoö compta, (S. 1. Smith in:) A. E. Verrill 
in: Rep: U. S. Fish Comm., v.1 p.564 | 1893 A.?c., A. Della Valle in: F. Fl. Neapel, 
v.20 p.463. 


Mouth-parts, uropod 3, and telson undeseribed. L. reaching 13 mm. 


North-Atlantic (from North Carolina to Cape Cod, among eel-grass; Vineyard Sound, 
'at surface). 


5. Gen. Sunamphitoe Bate 


1856 Sunamphitoe (nom. nud.), Bate in: Rep. Brit. Ass., Meet. 25 p. 59 | 1857 
S., Bate in: Ann. nat. Hist., ser.2 v.19 p.147 | 1888 S$., T. Stebbing in; Rep; Voy. 
Challenger, v.29 p. 1722| 1857 Synamphithoe, A. White, Hist. Brit. Crust., p. 201 | 1862 
Sunamphithoe, Bate (& Westwood), Brit. sess. Crust., v.1 p.429 | 1894 $., G. O. Sars, 
Crust. Norway, v.1 p. 584. 


Like Ampithoe (p. 631), but deeisively distinguished by absence of 
mandibular palp; in the bifid front lobes of lower lip the outer lobe less 
prominent; gnathopod 2 in S much larger than gnathopod 2 ing and 
differently shaped; hooks of telson small. 


l species. 


1. 8. pelagica (M.-E.) 1830 Amphithoe p., H. Milne Edwards in: Ann. Sei. nat., 
v.20 p.378 | 1840 Amphitoe p., H. Milne Edwards, Hist. nat. Crust., v.3 p.36 | 1856 Sun- 
amphitoö hamulus (nom. nud.) + $8. conformatus (nom. nud.), Bate in: Rep. Brit. Ass., 
Meet. 25 p.59 | 1857 S.h. (2°) + 8. conformata (8), Bate in: Ann. nat. Hist., ser. 2 
v.19 p.147 | 1857 Synamphithoe h.—+ S.c., A. White, Hist. Brit. Crust., p.202 | 1862 
Sunamphithoö h. + S. c., Bate & Westwood, Brit. sess. Crust., v.1 p.480 f.; p.482 f. |. 
1862 S.h.+3S.c., Bate, Cat. Amphip. Brit. Mus., p. 250 t.43 f£.5; p. 251 t.43£.6| 
1874 8. c., T. Stebbing in: Ann. nat. Hist., ser. 4 v.14 p.116 t. 12 f.4,4a—d | 1894 
S.c., G.O. Sars, Crust. Norway, v.1 p.585 t.208 | ?1861 Amphitho& grandimana, A. Boeck 
in: Forh. Skand. Naturf., Mode 8 p.668 | 1876 A.g., A. Boeck, Skand. Arkt. Amphip., 


0.2 p.591 1.26 f.4 | 1893 Amphithoe hamulus + Grubia erassicornis (part.), A. Della 


Valle in: F. Fl. Neapel, v.20 p.463 t.57 f.28, 29; p. 464. 


646 Sunamphitoe, Biancolina 


Side-plates 1—4 with setules at lower hind corner; side-plate 1 scarcely 
produced forward, 5tt the largest. Body smooth, compressed. Head, lateral 
lobes broadly rounded. Pleon segment 3, postero-lateral corners obtusely 
quadrate. Eyes small, rounded, red. Antenna 1 longer than antenna 2; 
1st joint the largest, 39 small; flagellum elongate, in S reaching more than 
40 joints. Antenna 2, ultimate joint of peduncle shorter than penultimate, 
flagellum shorter than peduncle, in J reaching 17 setose joints. Mandible 
just as in Ampithoe rubricata (p. 639), except for absence of palp. Gnathopod 1, 
24 joint apically a little widened, 5tk distally widened, 6! rather longer 
than 5th, oblong; palm transverse, short; finger projeeting beyond palm, 
faintly serrate. Gnathopod 2 in JS, 5tk joint cup-shaped, short, its hind 
lobe narrow, 6! large, oblong oval, a setose lobe or tuberele projecting 
near hinge of finger, and from this the mieroscopieally dentieulate palm 
joining or forming the hind margin without defining point; the long, 
slightly sinuous finger about ®/, as -long as 6! joint. Gmathopod 2 in © 
like gnathopod 1, but with 5tk joint shorter, and 6" rather broader. Peraeo- 
pods 1 and 2, 24 joint broadly oval, 4 about as broad as long; finger blunt 
at tip. Peraeopod 3, 24 joint broader than long, 4" and 5th shorter than 6th, 
Peraeopods 4 and 5, 24 joint oblong oval, narrowing a little distally, 4 —6th 
joints moderately long. In peraeopods 3—5 the finger is curved, its inner 
margin marked as if for serration, of the apical spines on the 6" joint one 
follows the curve of the finger (Bate in 1857 describes these limbs as 
scarcely prehensile in S. Aamulus). Pleopods 1—3 with 3 coupling spines. Uro- 
pods 1 and 2, rami not very long. Uropod 3, outer ramus mieroscopically 
denticulate on upper margin, of the upturned spines the apical the smaller, 
inner ramus with several setules and 2 spinules. Telson broader than long, 
with a little tuberele or upturned point on either side of triangular apex. 
Colour greenish yellow with stellate markings. L. 8—17 mm. 

North-Atlantie, North-Sea and English Channel (Norway; France; North and 
South Devon, between tide-marks; Azores). 


6. Gen. Biancolina Della Valle 


1893 Biancolina (Sp. un.: B. algicola), A. Della Valle in: F. Fl. Neapel, v. 20 p. 562. 


Antenna 1 longer than antenna 2, without accessory flagellum, flagellum 
longer than pedunele. Upper lip rounded as in Ampithoe (p. 631). Lower 
lip, outer lobes indented on outer not on inner margin, inner lobes distinct 
to the base, little divergent apically. Mandible short, cutting edge with 
about 10 unequal teeth; accessory plate with 4 or 5 teeth, smaller on right than 
on left mandible, spine-row of 3 or 4 minute spines; molar evanescent; 
palp wholly wanting. Maxilla 1 powerful, inner plate small, with 1 seta, 
outer long, with 9 spines so 'erowded as to make the counting rather 
uncertain. Maxilla 2, both plates slender, feebly armed, outer a little the 
longer and broader. Maxillipeds, inner plates rather long and narrow on 
elongate base, outer reaching beyond 24 joint of palp, armed with few but 
strong spine-teeth; palp’s joints 1—3 short, stout; finger small, conical, with 
well formed nail. Gnathopod 1 forming a small imperfect chela. Gnathopod 2 
massive, subchelate. Peraeopods I—5, 24 joint somewhat expanded, finger 
curved. Peraeopod 3, 6t% joint reverted. Uropod 3, peduncle stout, rami 
short, lamellar, outer with 2 hooks. Telson small. 


‘1 species. 


NEE m 


Biancolina, Jassidae 647 


1. B. cuniculus (Stebb.) 1874 Amphithoe c., T. Stebbing in: Ann. nat. Hist., 
ser.4 v.14 p.112 t. 11 f.1,1a—e | 1898 A. c.+ Biancolina algicola (9 juv.), A. Della 
Valle in: F. Fl. Neapel, v.20 p.460 t.57 f.38; p.562 t.3 f.11, t.32 f.38—53 | 1899 
B. c., T. Stebbing in: Ann. nat. Hist., ser. 7 v.3 p.350. 


Integument brittle. Head with bulging cheeks, rabbit-like in profile, 
attachment of antennae prominent. Side-plates not deep, but shaped as in 
Ampithoe (p. 631). Pleon segment 3, postero-lateral corners rounded. Eyes 
small, round, red. Antenna 1, 1° joint a little longer than 24, which is 
twice as long as 34; flagellum sometimes twice as long as peduncle, with 18 
unequal joints, some with sensory filaments. Antenna 2, ultimate joint of 
peduncle rather shorter than penultimate, flagellum shorter than peduncle, 
5-jointed. Gmathopod 1, 24 joint expanded distally, 34 and 4th equal, 5th 
widening a little distally, scarcely longer than 6%, which has a small slightly 
produced palm, much overlapped by the small and stout but acute finger. 
Gnathopod 2 massive (at least in JS); 24 joint expanded, 5tk short, cup- 
like, 6! very large, broad and long; palm excavate, defined by a tooth; 
finger large, arcuate, obliquely truncate, leaving cavity between its apex 
and its minute nail. Peraeopods 1 and 2, 24 joint expanded, oval, 4tk short 
and wide, 6!" longer than 5tt, Peraeopod 3 short, 24 joint rounded, expanded 
proximally, 3&—5th short. Peraeopods 4 and 5 rather long, 24 joint somewhat 
expanded, narrowed distally, 4" and 5!" moderately long, 6!" longer. Uropodl, 
peduncle long, setose, with an oval process at apex, the slightly unequal 
rami rather shorter than peduncle. Uropod 2 shorter; some setae on 
peduncle, which is as long as the rami. Uropod 3, peduncle short, much longer 
than the small broad rami, inner with 4 slight spinules. Colour bright 
yellow. L. 45 mm. 


‘ Bay of Naples, depth 1—2 m; Torbay, within tide-marks. 


| 37. Fam. Jassidae 
1899 Ischyroceridae, T. Stebbing in: Ann. nat. Hist., ser. 7 v.4 p. 211. 


Head, lateral lobes often somewhat prominent. Side-plates variable 
in relative proportions, 4% with hind margin usually not excavate (Fig. 111 
p-650). Antennael and 2 variable in relative proportions; accessory flagellum of 
antenna 1 distinet or indistinet, but never large. Upper lip with pointed 
epistome. Lower lip and mouth-parts in general as in Aoridae (p.585), except 
that the 34 joint of mandibular palp is shorter than 24, laminar, and that the 
maxillipedsin Wyvillea (p. 648) have inner and outer platesrudimentary and palp 
3-jointed. Gnathopods 1 and 2 subchelate, 24 the larger, often greatly 
modified in d. Peraeopods 1 and 2 glandular. Peraeopod 3 reverted. 
Peraeopod 5 the longest. Uropods 1—3 biramous. Uropod 3, rami very 
short, the outer uncinate and usually surmounted by denticles. Telson simple. 

Marine. 


5 genera, 21 accepted species and 5 doubtful. 
Synopsis of genera: 


1 | Maxillipeds, palp 3-jointed . . .. 2.2... 1. Gen. Wyvillea . . . p.648 
Maxillipeds, palp 4-jointed — 2. 


9 [ Antenna 1, accessory flagellum indistinet . . 2. Gen. Parajassa . . .:p.649 
Antenna 1, accessory flagellum distinet — 8. 


648 Jassidae, Wyvillea 


Side-plate 5 not much deeper than side-plate 6. 3, Gen. Mierojassa. . . p.65l 
» | Side-plate 5 much deeper than side-plate 6 — 4. 
Gnathopod 2 in d, hind margin of 6th joint 
produced into a tooth; gnathopod 2 in Q er Br: 
much larger than gnathopod 1... . . 4. Gen. Jassa .... . p: 652 
Gnathopod 2 in d, hind margin of 6th joint 
not produced into a tooth; gnathopod 2 in 
® not much larger than gnathopod 1 . . 5. Gen. Ischyrocerus . p. 657 


4 


1. Gen. Wyvillea Hasw. 


1879 Wyvillea (Sp. un.: W. longimanus), Haswell in: P. Linn. Soe. N.S. Wales, 
0.4 p.336 | 1888 W., T. Stebbing in: Rep. Voy. Challenger, v.29 p.518 | 1880 Macleayia, 
Haswell in: Ann. nat. Hist., ser.5 v.5 p. 32. 

Side-plates scarcely so deep as their segments. Antenna 1 shorter 
than antenna 2, with accessory flagellum. Mandible with palp. Maxillipeds 
exunguiculate, inner and outer plates rudimentary; palp 3-jointed. Gnathopod 2 
verylarge. Uropod 3 apparently as in Jassa (p. 652). Telson entire or emarginate. 


2 species. 
Synopsis of species: 


Teiase  wirh ask De Si, 5 ee 1. W.longimana . . p.648 
Telson with apex emarginate . . -. 2.22 .% .. 2. W.haswelli . . . p.648 


1. W.longimana Hasw. 1879 W. longimanus, Haswell in: P. Linn. Soc. N.S. 

Wales, v. 4 p.387 t.22 f.7 | 1884 Podocerus l., Chilton in: 'Ir. N. Zealand Inst., v. 16 

p.255 1.17 f.2 ae | 1879 P. eylindricus (err., non Say 1818?), T. W. Kirk in: Tr. N. 
Zealand Inst., v.11 p. 402. 


Eyes round. Antenna 1 searcely ’/, as long as body; gu joint bnich 
as long as 1°, a little longer than 3%; flagellum as long as 2 joint of 
peduncele, 7-jointed; accessory flagellum nearly !/, as long as primary, 2-jointed. 
Antenna 2 about half as long as body, stout, subpediform; peduncle as long 
as antenna 1; flagellum as long as ultimate joint of peduncle, armed distally 
with eurved spines. Gnathopod 1 small, 5tk joint about half as long as 6%, 
6th ovoid, distally narrowed; palm very oblique, defined only by 2 palmar 
spines; finger serrate (Chilton). Gnathopod 2 in C very large; 5th joint 
small, triangular, 6% eylindrical, eurved, margins parallel, 4 times as long 
as broad, with a blunt tooth at each end of the eoncave, rather hirsute 
margin, which should be considered as the palm; proximal tooth not deeurrent. 
Gnathopod 2 in @ (Chilton) not larger than gnathopod 1, and similar thereto, 
but with 5% joint shorter, and 6! rather more narrowed distally; finger in 
both gnathopods roughened rather than serrate. Peraeopods 1—5 all short 
and broad, 1° and 24 shorter than the rest. Uropod 3, peduncle long, 
narrowing slightly distally; rami very short, inner stiliform, outer ending in 

3—6 upturned teeth (Chilton). Telson eonieal, blunt. Colour pale re 
with many black dots and markings (Chilton). L. 3—14 mm. 


South-Paeifie (Port Jackson [East-Australia]; Worser Bay and Lyttelton Harbour 
[New Zealand)). 


2. W. haswelli (G. M. Thoms.) 1897 Maera h., G. M. Thomson in: Ann. nat. 
Hist., ser.6 0.20 p.449 t.10-£.6—10 | 1899 Wyvillea h., T. Stebbing in: Ann. nat. Hist., 
ser. 7 v.3°p.350. 


Body slender and compressed. Head long, without rostrum; lateral 
lobes small, acutely produced. Eyes produced well forward on lateral lobes 


Wyvillea, Parajassa 643 


of head; lenses numerous. Antenna 1, 1° joint thicker but rather shorter 
than 24 or 34, 34 a little shorter than 24; flagellum slender, broken; 
accessory flagellum 4-jointed, about as long as 34 joint of pedunele. Antenna 2 
‚broken. Mandible normal; palp with very short 1st joint, 39 rather shorter 
than 24, broad ended, with setae on apex. Gnathopod 1 small, 5tk joint 
distally a little expanded, 6'k rather shorter, oval, palm oblique, ill-defined, 
finger a little over half as long as 6! joint. Gmathopod 2 very large, 4th 
joint small, triangular, hind margin produced acutely, 5t% joint very short, 
similarly produced very acutely, 6% very long, narrow at base, widening 
gradually to a transverse, slightly dentieulate palm, defined by a small tooth; 
the straight hind margin having also a small tooth or projection at its base; 
the great finger projeets far over the palm, its falcate end elosing between 
the acute ends of the 4 and 5tk joints. Peraeopod 4 rather slender. 
Uropods 1 and 2 reaching nearly as far as uropod 3. Telson (in figure) 


broader than long, rounded, with an excavation little more than "/, the. 


length, between 2 rounded apices, each with a spinule. L. 4 mm. 
South-Paeifie (New-Zealand). Depth 15 m. 


2. Gen. Parajassa Stebb. 


1813/14 Jassa (part.), Leach in: Edinb. Ene., ©.7 p.483 | 1859 J., R.M. Bruzelius 
in: Svenska Ak. Handl., n. ser. v.8 nr. 1 p.18 | 1871 Janassa (Sp. un.: J. variegata) 
(non G. Münster 1839, Pisces!), A. Boeck in: Forh. Selsk. Christian., 1870 p.249 | 1876 
J., A. Boeck, Skand. Arkt. Amphip., v.2 p.608 | 1894 J., G.O. Sars, Crust. Norway, 
v.1 p.598 | 1895 J., A. O. Walker in: Ann, nat. Hist., ser. 6 v.15 p.472 | 1899 Para- 
jassa, T. Stebbing in: Ann. nat. Hist., ser. 7 e.3 p. 240. 


Like Jassa (p. 652), except that the accessory flagellum of antenna 1 
is nearly obsolete, none of the side-plates are particularly deep, and the 
5 side-plate is almost as deep as the 4fh, 


2 species. 


Synopsis of species: 


Antennae 1 and 2 conspieuously unequal .... . 1. P. pelagica .... . p- 649 
Antennge 1 and 2 subequal ...... 222... 2. P. tristanensis . . . p.650 


1..P. pelagica (Leach) 1813/14 Jassa p., Leach in: Edinb. Ene., v.7 p.433 | 
1899 Parajassa p., T. Stebbing in: Ann. nat. Hist., ser. 7 v.3 p.240 | 1843 Podocerus 
eapillatus, H. Rathke in: N. Acta Ac. Leop., 2.201 p.89 t.4 f.8 | 1859 Jassa capillata, 
R.M. Bruzelius in: Svenska Ak. Handl., n. ser. ©.3 nr. 1 p.19 | 1894 Janassa c., G.O. 
Sars, Crust. Norway, v.1 p.599 t.214 | 1895 J.e., A. O. Walker in: P. Liverp. biol, 
Soc., ©,9 p- 316 | 1871 J. variegata (err., non Podocerus variegatus Leach 1813/14]), 
A. Boeck in; Forh. Selsk. Christian., 1870 p.250 | 1876 J.», A. Boeck, Skand. Arkt. 
Amphip. „ v.2 p.608 1.28 f.1; 1.29 f.2 and? 3 | 1893 Podocerus falcatus (part.), A. Della 
Valle in: F. Fl. Neapel, v. 20 p- 445. 


Body (Fig. 111 p. 650) rather tumid, especially in ©. Head rather small, 
front lobes narrowly rounded. 1° and 34 side-plates produced below the 
24, Pleon segment 3, postero-lateral corners rounded. Eyes small, rounded, 
dark. Antennae 1 and 2 in C und 0 densely setose with setae separate 
and in fascicles. Antenna 1 more than !/, as long as body; 34 joint longer 
than 1°, as long as 24, rather longer than flagellum, of which 1° joint is 
very large, 24 and 34 minute; accessory flagellum a mere tuberele. Antenna 2 
longer and much stronger; ultimate joint of peduncle slightly longer than 


650 Parajassa 


penultimate, as long as flagellum, which is similar to that of antenna 1, 
but larger. Gnathopod 1, 5t& joint triangular, 6tk oval, widest in the middle 
where the hind margin joins the straight oblique palm, defined by an obtuse 
angle and palmar spines. Gnathopod 2 nearly alike in d and Oo; 6th joint 

broad, in 9 the 


internal ed 
(23 198 ba ee 


Pays teh (Leach), 
a 7 EN the ae ae 


IM . . 
ie ers Min SMS within the well 
7 R N > marked defining 
? ZR va 2” AS angle, while in 
| /f Si UN the 5 this angle 
> IÄN is produced into 
AN an almost thumb- 


He: Pe like tooth, over- 

Lateral view. [After G. O. Sars.] lapped by the 

strong finger. 
Peraeopods 1 and 2 short and stout, 24 joint a little widened. Peraeo- 
pods 3—5 slightly encreasing successively in length; 24 joint oblong oval; 
in peraeopod 5 the lower hind corner slightly produced. Uropod 3 reaching 
rather beyond the others, outer ramus uncinate, without marginal serrations, 
inner with a lateral spinule. Telson about as long as broad, with small 
projection and adjacent setule at each side of the apical triangle. Colour 

grey or dark, with transverse bars of brown. L. 9 7, 0 9 mm. 


Arctie Ocean and North-Atlantie (Norway up to Finmark, Shetland Islands); 
Kattegat; German Sea; Liverpool Bay. 


2. P. tristanensis (Stebb.) 1888 Podocerus t., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.1141 t.121 | 1893 Ischyrocerus t., A. Della Valle in: F. Fl. Neapel, 
v.20 p.450 1.57 f.20 | 1899 Parajassa t., T. Stebbing in: Ann. nat. Hist., ser. 7 v.3 p. 240. 


Body not robust. Head, lateral lobes not very prominent, with acute 
point. . Side-plates 1—5 about equal in depth. Pleon segment 3, postero- 
lateral corners obtuse. Eyes rounded oval, dark in spirit. Antennae 1 and 2 
subequal, slender, with long setae, not. densely grouped, some plumose. 
Antenna 1, 34 joint much longer than 1°, subequal to 24, shorter than 
flagellum, of which the 1° joint is about half as long as the other 3 combined; 
accessory flagellum seemingly absent. Antenna 2, ultimate joint of peduncle 
as long as penultimate, both together rather longer than the 4-jointed 
flagellum. Gmathopod 1, 24 joint not longer than 5t%, which is nearly or 
quite as long as the rather narrowly oblong oval 6%; palm ill-defined, shorter 
than the hind margin; finger overlapping palm, finely pectinate, with a denticle 
near the acute apex. Gnathopod 2 in J, 24 joint short, with greatly expanded 
distal lobe, 5t" short, broadiy cup-shaped, 6th large, not twice as long as 
broad; palm with broad tooth near finger-hinge, then shallowly excavate, 
parallel to front margin, and subequal.to hind ‘margin, which ends in a 
short tooth, against which the apex of the stout, much curved, smooth finger 
impinges. Gnathopod 2 in © differing from gnathopod 1 by the short, eup- 
shaped 5th joint, the 6! somewhat larger with a better defined palm, and 
the pectinate finger armed with a longer dentiele. Peraeopods 1 and 2 
rather short and compact, the 24 and 4! joints a little expanded. Peraeo- 
pod 5 rather long; 24 joint oblong, not much expanded, shorter than the 6th, 


u de oc 2 
"EB 


= rl rt 5" ar ee A ei a m Fi BEE 
a” ,* ru = 


Parajassa, Microjassa 651 


Pleopods, rami with 5 joints. Uropod 3, peduncle broad, not twice as long 
as rami; outer ramus the shorter, with 2 minute spines at its slightly bent 
tip; inner ramus with a rather larger apical spine. Telson as broad as 
long, rounded triangular, with a small projeetion and adjacent setule at 
each side of the apical triangle.. L. about 3 mm. 


South-Atlantie (Tristan da Cunha). Depth 201 m. 


3. Gen. Microjassa Stebb. 


1899 Microjassa (Sp. un.: Podocerus cumbrensis), T. Stebbing in: Ann, nat. Hist., 
ser.7 v.3 p.240. 


Like Jassa (p. 652), except in regard to side-plates, antenna 2 and 
maxillipeds. Side-plates 2—4 much deeper than the rest, 4th large, emarginate 
behind for the small 5tt, Antenna 2 but little stronger than antenna 1. 
Maxillipeds, outer plates scantily armed. As in Ischyrocerus (p. 657) gnathopods 1 
and 2 of oO little unequal, but gnathopod 2 of much larger than gnathopod 1, 
and differing in shape as well as size from gnathopod 2 of oO. 


1 species. 


1. M. cumbrensis (Stebb. & D. Roberts.) 1891 Podocerus c., T. Stebbing & 
D. Robertson in: Tr. zool. Soc. London, v.131 p.38 t.68 | 1895 P.c., A. O. Walker in: 
P. Liverp. biol. Soe., v.9 p.316 | 1899 P. c., Microjassa, T. Stebbing in: Ann. nat. Hist., 
ser. 7 v.3 p.240 | 1893 P. falcatus (part.), P. anguipes (part.)?, A. Della Valle in: F. Fl. 
Neapel, v.20 p. 445, 944. 


Head, rostrum small, blunt; lateral lobes obtusely pointed. Side-plate 1 
very small, almost concealed by the much larger and deeper 24; 34 and 
4th as deep as 24 and much broader; 4th of equal breadth and depth, with 
shallow emargination behind; 5th—7th small, shallow. Pleon segment 3, 
postero-lateral angles bluntly produced. Eyes round. Antenna 1, 1% joint 
short and stout, 24 long, a little longer than 34; flagellum "/, as long as 
peduncle, with 3 slender joints; accessory flagellum 1-jointed, about '/, as 
long as 1° joint of primary. Antenna 2 stouter and a little longer than antenna 1, 
otherwise very similar; ultimate and penultimate joints of peduncle subequal 
in length; flagellum as long as ultimate joint of peduncle, with 3 slender 
joints. Mandible, eutting plate quadridentate, accessory plate similar on left, 
serrate on right, molar with small dentieulate plate in front; 24 and 34 joints 
of palp broad, 39 the shorter. Maxillipeds, outer plates with 3 spine-teeth 
on inner and 4 on distal margin, 4tk joint of palp short, blunt, tipped with 
long spines. Gmnathopod 1, 24 joint a little bent, 5t% cup-shaped, scarcely 
longer than 4h, 6tk oval, about twice as long as 5th; palm ‚defined by 3 
palmar spines, slightly overlapped by apex of finger. Gnathopod 2 in GC, 
24 joint channelled in front, shorter than 6th; 5th joint short, coalesced 
with 6tb; 6th joint very large, oblong, attaining a length 2"/, times the 
width; hind margin produced into a long tooth, forming a deep cavity 
between itself and the straight palmar margin, which is produced to a smaller 
tooth near the finger-hinge; over the 2 cavities arches an immensely long, 
eurved, sinuous finger, with a small prominence on inner margin. Gnatho- 
pod 2 in © is like gnathopod 1, but a little larger. Peraeopods 1 and 2, 
24 joint long’ oval, 4! rather broad, widening distally, 5t" broader but much 
shorter than 6t%, Peraeopod 3, 24 joint longer than broad, widest proximally. 
Peraeopod 4 like the 34, but 24 joint with hind margin more strongly serrate. 


ER re RR 


652 Mierojassa, Jassa 


Peraeopod 5 longer, 29 joint widest at the middle. Branchial vesicles very 
small. Marsupial plates rather large. Pleopods 1—3 with 2 coupling spines, 
inner ramus with 5—7 joints, outer with 6—8. Uropod 1, pedunele longer 
than rami. Uropod 2, pedunele longer than outer, shorter than inner ramus. 
Uropod 3, pedunele stout, longer than peduncle of uropod 2; outer ramus 
having on distal half about 9 minute denticles, encreasing towards apex; 
inner ramus rather longer, straight, tipped with spine. Telson triangular, 
as broad as long, with a setule on either side of rounded apex. Colour brown. 
L. 3 mm. 


Firth of Clyde, depth 38 mm; Irish Sea (North Wales). 


4. Gen. Jassa Leach 


1813/14 Jassa (part.), Leach in: Edinb. Ene,, v.7 p.433 | 1899 J., T. Stebbing 
in: Ann. nat. Hist., ser. 7 v.3 p.239 | 1852 Cratophium, J. D. Dana in: Amer. J. Sei., 
ser.2 v.14 p.309 | 1853 C., J. D. Dana in; U. 8. expl. Exp., v.13u p. 832, 840. 


Body more slender in G than m ©. Head with small rostral point 
and lateral lobes somewhat produced. Side-plate 2 broader than deep in C}; 
34 and 4th in both sexes deeper than 24 or 5tk; 4th not perceptibly emarginate 
behind. Antennae 1 and 2 setose, peduncle long, flagellum much shorter. 
Antenna 1, 1° joint shorter than 24 or 34; accessory flagellum very small. 
Antenna 2 usually considerably longer and stouter than antenna 1, especially 
in S. Upper lip rounded, epistome (so far as known) with pointed process. 
- Lower lip normal. Mandible normal, palp very large, 34 joint shorter than 
24, distally widened, strongly setose. Maxilla 1, inner plate very small 
with inconspieuous marginal setae, outer plate with 9 apical spines; 24 joint 
of palp long, with apical spine-teeth. Maxilla 2, inner plate the shorter, 
with lateral fringe. Maxillipeds normal, compact. Gnathopod 2 in both 
sexes much larger than gnathopod 1, stronger in J than in 9; the hind 
margin of 6! joint in J produeed into a strong tooth. Peraeopods 1 
and 2, 24 joint slightly expanded. Peraeopods 3—5 suecessively longer, 
with moderately expanded 24 joint. Uropods 1 and 2, outer ramus shorter 
than inner. Uropod 3, pedunele stout, much longer than the rami, outer 
of which ends in a hook or hooked spine and usually has little teeth on 
the upper margin, inner ramus straight. Telson triangular. 


7 species accepted, 4 obscure. 


Synopsis of accepted speeies: 


on inner margin — 2. 
Gnathopod 2 in S, finger without prominent tooth 


| Gnathopod 2 in d, finger with prominent tooth 
on inner margin — 3. 


ned Iopih re 1. J.dentex . . . . p.653 


Gnathopod 2 in d, 6th joint with basal thin- 


| Gnathopod 2 in d, 6th joint with subbasal thick- 
endad toelh an 2. J. faleatiformis . p.653 


process near the base — 4. 
Gnathopod 2 in S, 6th joint with thumb-like process 


| Gnathopod 2 in d, 6th joint with thumb-like 
remote from base — 6. 


er 2 Ba u a Er N Se Be we ,-, 7. 


ee 


Be» 


Jassa 653 


Antenna 2, ultimate joint of pedunele much longer 
: an vente 2... anne. 3. J.ingens . . - . p.658 
- * | Antenna 2, ultimate joint of peduncle not much 
longer than penultimate — 5. 


ME el ee; 4. J. pulchella . . . p.654 


Gnathopod 2 in d, thumb-like process with simple 
i Gnathopod 2 in J, thumb-like process with 
N PR 5. J. pusilla . . . . p.655 
6 Peraeopod 4 in ä with joints 4—6 narrow.. . . 6. J.ocius . . „» -» » p.655 
.\ Peraeopod 4 in S with joints 4—6 broad . . . 7. J. frequens . . . p.656 


1. J. dentex (Czern.) 1868 Podocerus d., Czerniavski in: Syezda Russ. Est., 
Syezda 1 Zool. p.100 t.6 f.35 | 1880 P.d., Sowinski in: M&m. Soc. Kiew, v.6 p. 110 
t.4f.8 | 1899 Jassa d., T. Stebbing in: Ann. nat. Hist., ser.7 v.3 p.350 | 1898 Podocerus 
herdmani, A. ©. Walker in: P. Liverp. biol. Soe., v.7 p.37 f.13 | 1895 P.h., P. fal- 
catus var.?, A.O. Walker in: Ann. nat. Hist., ser. 6 v.15 p.473 | 1895 P.h., P. f. var.?, 
A. ©. Walker in: P. Liverp. biol. Soe., v.9 p.314 | 1893 P. ocius (part.), A. Della Valle 
in: F. Fl. Neapel, v.20 p.448 | 1898 P.o., Sowinski in: M&m. Soc. Kiew., v.15 p. 460 | 
1894 P. odontonys, G. O. Sars, Crust. Norway, v.1 p.597 t. 213 f. 2. 

oO. In general like J. pusilla (p. 655). — ©. Head, lateral lobes rather 
broad, atapex minutely emarginate. Side-plate 1 rather produced forward, 24 twice 
as broad as deep. Eyes rather large, rounded, brownish or black. Antenna 1 
about half as long as body; 24 joint as long as 34, nearly twice as long 
as 1°; flagellum 3—5-jointed, accessory flagellum extremely minute. Antenna 2 
a little longer, more robust; flagellum 3- or 4-jointed. Gnathopod 1 nearly 
as in J. pulchella (p. 654) and J. pusilla. Gnathopod 2, 6 joint oblong oval, 
with a stout tooth close up to the finger-hinge, and another prolonged from the 
hind margin, with a rather deep eavity between; both teeth sometimes bifid; 
finger strong and curved, with a variable tooth at middle of inner margin. 
Peraeopods, uropods and telson seemingly like those in J.pusilla. Colour, 
variegated with dark brown. L. 3—5 mm. 


Arctic Ocean, North-Atlantie and Irish Sea (Trondhjemsfjord and Hammerfest; 
Colwyn Bay; Liverpool Bay); Black Sea. Depth 1-—-282 m. 


2. J. falcatiformis (Sowinski) 1898 Podocerus f. + Ischyrocerus constantino- 
politanus (juv.), Sowinski in: M&m. Soc. Kiew., %.15 p.461 t.8 f.9—16; p.463 t.8 
f. 17— 25. 


Adult © unknown. — d. Antenna 1, 24 joint more than twice as long 


as Ist, a little longer than 34, a little shorter than the 3-jointed flagellum. 


Gnathopod 2, 6! joint long and rather slender, narrowing to the finger- 
hinge, front margin very convex, a slender tooth, fully half the length of 
the joint, rising from the base behind, alongside the straight palm, which 


‘is interrupted a little beyond the basal tooth by a Small projecting tooth, 


apposed to a similar tooth on the inner margin of the finger; finger as 
long as the 6th joint, with 5 setules om its distal concavity. Uropod 3, 
peduncle long and thieck, outer ramus uneinate, distally crenulate with 9 
small close-set blunt teeth. L. 4 mm. 


Bosphorus. Depth 32--36 m. 
3. J. ingens (Pfeff.) 1888 Podocerus i., Pfeffer in: Jahrb. Hamburg. Anst., 
v.5p.131t.3£.1 | 1898 P. faleatus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p:445. 


Head, lateral lobes bluntly triangular. Side-plate 1 produced a little 
forward, 24 broader than deep, 34 and 4th sueeessively deeper; front lobe 


De a 


654 Jassa 


of 5th nearly as deep as 4tk, Pleon segment 3, postero-lateral corners obtuse. 
Eyes longitudinally oval. Antenna 1, 1° joint ®/, as long as 24, 34 as long 
as 24; flagellum a little longer than 34 joint of peduncle, with 7 joints, 
15t much the longest. Antenna 2 much longer, about °/, as long as body; 
ultimate joint of peduncle very long, 1'/, timesaslong as penultimate, not setose; 
flagellum shorter than ultimate joint of peduncle, 6-jointed. Gnathopod 1, 
6th joint piriform, the narrow part apical; finger finely serrate. Gnathopod 2 
in S very large and powerful; the 6! joint long, slightly curved, with tooth 
of moderate length springing from near the base and having in a notch on 
the outer side a tuft of spines or setae; a triangular tooth is near the finger- 
hinge, and against this a prominence of the long finger works, while its 
apex closes down on to the outer notch of the other tooth. Gnathopod 2 
in Q differs from J in that the proximal tooth is represented by a rounded, 
truncate prominence of the hind or palmar margin. Peraeopods 1 and 2 
comparatively short and weak; 4 joint distally widened. Peraeopods 3—5 
successively longer, 24 joint well expanded, its hind margin in peraeopod 3 
weakly concave, in 4®% straight, in 5th weakly convex. Telson small, rounded 
triangular, rather broader than long, with 1 spine on each side of the apex. 
Colour grey and whitish, variegated with brown. L. 12—26 mm. 


South-Atlantie (South Georgia). At lowest ebb of spring-tides. 


4. J. pulchella Leach 1813/14 J.p., Leach in: Edinb. Ene., v.7 p.433 | 1899 
J. 2., T. Stebbing in: Ann. nat. Hist., ser.7 v.3 p.239 | 1830 Podocerus pulchellus, 
H. Milne Edwards in: Ann. Sei. nat., v.20 p.384 | 1843 P. calcaratus, H. Rathke in: 
N. Acta Ac. Leop., 0.201 p.91 t.4 f£.9 | 1851 Ischyrocerus (P.) e., I. anguipes (err., non 
I.5angvipes Kröyer 1838!), W. Liljeborg in: Ofv. Ak. Förh., v.8 p.28 | 1853 & 55 Crato- 
phium validum, J. D. Dana in: U. S. expl. Exp., v.1311 p.841; t.56 f.2 | 1886 Podocerus 
validus, G.M. Thomson & Chilton in: Tr. N. Zealand Inst., v.18 p.143 | 1857 P. falcatus 
(err., non Cancer (Gammarus) f. Montagu 1808!), Bate in: Ann. nat. Hist., ser.2 v.19 
p.148 | 1876 P. f. (part.), A. Boeck, Skand. Arkt. Amphip., v.2 p.603 t.27 f.4,7 | 1879 
P.f., Hoek in: Tijdschr. Nederl. dierk. Ver., v.4 p.120 t.8 £.13—15; t.9 f.1—3 | 1881 


P.f., Nebeski in: Arb. Inst. Wien, v.3 p.151 t.18 f.44 | 1887 P. f., J. Bonnier in: 


Bull. sei. Nord, v.18 p.840 | 1893 P. f. (part.), A. Della Valle in: F. Fl. Neapel, v.20 
p. 445 t.14 f.1—10; t.57 f.13—16 | 1894 P. f., G. O. Sars, Crust. Norway, v.1 p. 594 
t.212 | 1895 P. f., A. O. Walker in: Ann. nat. Hist., ser. 6 v.15 p.472 | 1862 P. pul- 
chellus + P. validus + P. f. + P. pelagieus (err., non Jassa pelagica Leach 1813/14!), 
Bate, Cat. Amphip. Brit. Mus., p.253 t.48 f.8; p.258 t.48 f.9; p.255 t.44 f.1; p.255 
t.44 f.2| 1879 P. australis, Haswell in: P. Linn. Soc. N.S. Wales, v.4 p.338 t.21 f.8 | 1888 
P. falcatus + P. validus, T. Stebbing in: Rep. Voy. Challenger, 0.29 p.1132 t.119; 
p- 1135 t. 138». 


Body more slender and compressed in J than in O0. Head, lateral 
lobes small, rounded, prominent. Side-plate 1 somewhat angularly produced 
forward, 24 in J broader than deep, 34 and 4 in C considerably deeper 


than 24 or 5tk, Pleon segment 3, postero-lateral corners quadrate, with 


minute projecting point. Eyes small, rounded, dark. Antenna 1 not half 
as long as body, 34 joint considerably longer than 1°t, shorter than 29 or 
flagellum; flagellum 5—-9-jointed. Antenna 2 much longer and stouter, 
especially in S; ultimate joint of peduncle usually longer than penultimate; 
flagellum with 3—6 joints, 1° much the longest; flagellum and at least 
ultimate joint of peduncle often carrying fascieles of plumose setae. Gnatho- 
pod 1, 6! joint oval or somewhat piriform; palm straight, oblique, defined 
slightly by an obtuse angle and palmar spines. Gnathopod 2 in SO, 5tk joint 
masked by 4th, eup-shaped, very small, obscurely separated from 6th, sth 
very large, narrow, nearly straight, palm nearly parallel to front margin, 


Be Eu a EEE SER N a EEE 
A u a ee ae 
Te SE Fan Fee 2 = 


; 
i 


Jassa 655- 


with distal tooth near finger-hinge; the short hind margin ending in fully 
adult S in a long tooth (in younger d a dentiele nearer the distal than 
the proximal end of the joint), ornamented on the outer side with tufts of 


_ setae, its apex overlapped by that of the long slightly sinuous finger; inner 


margin of finger sometimes on proximal half minutely tubereulate. Gnatho- 
pod 2 in © much larger than gnathopod 1, irregular oval, or long piriform, 
hind margin very short, the long palm having a distal tooth near the finger- 
hinge, thence passing with a long excavation to 2 prominences, of which 
the 24 is beset with 3 palmar spines, among which the apex of the long 
serrate finger impinges. Peraeopods 1 and 2 rather short and stout, 24 joint 
a little expanded, 4 distally widened. Peraeopods 3—5 successively longer, 
24 joint oval. Uropod 3, outer ramus unecinate, with 2 teeth on upper distal 
margin. Telson very small, triangular, with 2 setae on each side of the 
acute apex. Colour, brown or red patches, of various shapes and sizes. 
L. 5—10 mm. 


Atlantic with adjoining seas (Europe from Trondhjemsfjord to Naples; Azores; 
Rio Janeiro); Southern Indian Ocean (Kerguelen Island); Pacifie (Philippines; Port 
Jackson [East-Australia]; lat. 43° S., long 82° W.). 


5. J. pusilla (O.Sars) 1876 Podocerus falcatus (part.), A. Boeck, Skand. Arkt. 
Amphip., v.2 p.605 t.28 f.2 | 1893 P. f. (part.), A. Della Valle in: F. Fl. Neapel, v. 20: 
p-445 | 1895 P. f.var.?, A.O. Walker in: Ann. nat. Hist., ser.6 v.15 p.473 | 1882 P. mi- 
nutus (non Ischyrocerus m. W. Lilljeborg 1855!), G. O. Sars in: Forh. Selsk. Christian., 
nr. 18 p.112 t.6 £.6,6a | 1894 P. pusillus, G. O. Sars, Crust. Norway, v.1 p. 596 
t. 212 £.1. 


In general like J. pulchella, but shorter and stouter. Head, lateral 
lobes rather broad and angular in front. Side-plate 1 in J rather sharply 
produced, 5! nearly as deep as 4!h, Pleon segment 3, postero-lateral 
corners simply quadrate. Eyes rather large, rounded, dark brown. An- 
tenna 1, 34 joint about twice as long as 1°, as long as 24, rather shorter 
than the 5-jointed flagellum. Antenna 2 rather longer, more robust, but not 
very stout; flagellum slender, 4-jointed, faseicles of setae not plumose. 
Gmathopod 2 in adult JS differing from that of J. pulchella in that the 
basal tooth of 6% joint is much shorter and broader and has a distinetly 
bifid apex. Gnathopod 2 in Q, 6 joint more regularly oval, palm less 
strongly sinuous, defined by a very slight angle, the 2 prominences much 
smaller and less widely separated than in J. pulchella. Peraeopods 1—5 
more slender, less densely setiferous. Uropod 3, outer ramus less coarsely 
hooked. Telson small, acutely produced at apex. Colour, variegated with 
jrregular patches of brown. L. about 5 mm. 


Aretie Ocean, North-Atlantie, North-Sea, Irish Sea and Skagerrak (South- and 
West-Norway, depth 37—188 m, on hydroids; British Isles; France). 


6. J. ocius (Bate) 1862 Podocerus o., Bate (& Westwood), Brit. sess. Crust., 
v.1 p.450 f. | 1862 P.o., Bate, Cat. Amphip. Brit. Mus., p. 257 t.44 f.5 | 1866 P. o., 
Cam. Heller in: Denk. Ak. Wien, v.26nm p.45 | 1868 P. o., Czerniavski in: Syezda Russ. 
Est., Syezda 1 Zool. p.99 | 1881 P.o., Nebeski in: Arb. Inst. Wien, v.3 p. 152—154 
t.13 f.43 | 1893 P. o. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.448 t.14 f.11—27 | 
1895 P.o., A. O. Walker in: Ann. nat. Hist., ser.6 v.15 p.473 | 1895 P.o., A. O. Walker 
in: P. Liverp. biol. Soe., v.9 p.316. i 


In general like J. pulchella, but distinguished by the gnathopod 2 
in d and ©, and uropod 3. Antennae 1 and 2 rather slender. Antenna 1, 


656 Jassa 


flagellum with 4 joints, 1° the longest, thrice as long as the little 1-jointed 
accessory flagellum. Antenna 2, flagellum with 3 joints, 1° about twice as 
long as 24 and 34 combined, 24 more than twice as long as 3%. Gmnathopod 1, 
6% joint piriform or oval, palm not defined except by the palmar spines; finger 
slightly dentieulate near the nail. Gnathopod 2 in 5, 6% joint widening distally, 
hind margin long, ending in a considerable tooth, the slightly oblique palm 
having another rather smaller tooth adjaeent to this, and after a cavity a 
broader tooth near the finger-hinge. Gnathopod 2 in © smaller than m Cd. 
but very similar, only that the tooth of the hind margin is less advanced 
than the adjacent tooth of the palm. Peraeopods 3—5 rather more slender 
than in J. pulchella. Uropod 3, outer ramus with unecinate apex but without 
teeth on upper edge. Telson with a seta on each side of acute apex. 
Colour pale yellow. L. 3—5 mm. 


—- Bristol Channel (North Devon); Irish Sea (Isle of Man); Mediterranean; Black Sea. 


7. J. frequens (Chilton) 1883 Podocerus f., Chilton in: Tr. N. Zealand Inst., 
w.15 p.85 t.3 f.2 | 1884 P. latipes (3), Chilton in: Tr. N. Zealand Inst., v.16 p. 258 
1.19 f.2a—d | 1893 P. frequens, P.1., A. DellaValle in: F. Fl. Neapel, v.20 p.447, 448. 
Eyes moderately large, round. Antennae 1 and 2 equal, setose, slender. 
Antenna 1, 34 joint longer than 1%, as long as 24, shorter than flagellum; 
flagellum 8-jointed, accessory flagellum 2- or 3-jointed. Antenna 2, ultimate 
Joint of pedunele as long as penultimate, shorter than the 8-jointed flagellum; 
spines at apex of flagellum little eurved. Gnathopod 1, 5tk joint longer 
than 6th, 6th narrowly oval; proximal half of finger serrate. Gnathopod 2 
in S, 5tk joint short, eup-shaped, 6t" stout, oblong, the hind margin ending 
in a3 square slightly emarginate process, a little overlapped by the broad 
proximally serrate finger; the not very oblique palm having a deep indent 
adjacent to process of hind margin. Gnathopod 2 in Q and probably young © 
having 6» joint without the square process, but the palm a little concave. 
Peraeopods 1--5 rather stout, especially peraeopod 4, which in the adult 9 
has all the joints expanded, the 24—5th as broad as long. Uropod: 3, 
pedunele stout, narrowing at apex, rami small, slender, nearly naked. 
'Telson with 2 curved spines, and anterior to these 1 or 2 simple setae. 
L- about 3 mm. 


Lyttelton Harbour [New Zealand]. 


J. californies (Boeck) 1872 Podocerus californicus, A. Boeck in: Forh. Selsk. 
Christian... 1871 p:41 t.1 f.6 | 1893 P. faleatus (part.), A: Della Valle in: F. Fl. Neapel, 
v.20 p. 445. 


L. 7 mm. 
Nörth-Pacifie (California). 


J. falcata (Mont.) 1808 Cancer (Gammarus) falcatus, Montagu in: Tr. Linn. 
Soe. London, «9 p. 100 t.5 £.2 | 1812 Astacus f., Pennant, Brit. Zool., ed.5 v.4 p.34 | 
‘1813/14 Cancer (Gammarus) f., Jassa (part.)?, Leach in: Edinb. Ene., v.7 p.483 | 1899 
J.f., A.O. Walker in: Ann. nat. Hist., ser. 7 0.8 p.895 | 1829-43 J. pelagica (err., 
non Leach 1813/14!), Guerin-Meneville, Iconogr. Regne an., #2 Crust. t.27 f.3; «3 
Crust. p. 28: 


Possibly identical with J. dentex (p. 653). The elongate curved finger of gnatho- 
pod 2 has (in figure) a prominent tooth on the inner margin not far from the finger-hinge. 


English Channel (South Devon). 


Jassa, Ischyrocerus 657 


J. orientalis (Dana) 1852 Gammarus o., J. D. Dana in: P, Amer. Ac., v.2 
p. 212 | 1853 & 55 Oratophium orientale, J. D. Dana in: U. 8. expl. Exp., v, 1311 p. 843; 
t. 56 f. 3a—b | 1862 Podocerus orientalis, Bate, Cat. Amphip. Brit. Mus., p.258 1.44 f.6 | 
1893 P. falcatus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.445. 


Gnathopod 2, 6th joint subovate, "palm nearly longitudinal, tridentate. L. 6 mm. 
Eastern entrance of the Strait of Sunda, 


J. ornata (Miers) 1875 Podocerus ornatus, Miers in: Ann, nat, Hist., ser. 4 
v.16 p.75 | 1879 P. o., Miers in: Phil. Tr., v.168 p.210 t.11 £.6 | 1893 P.?o., A, Della 
Valle in: F. Fl. Nerpel, v.20 p. 454. 


L. 13 mm. 
Swain’s Bay [Kerguelen Island]. 


5. Gen. Ischyrocerus Kröyer 


1838 Ischyrocerus (Sp. un.: I. angvipes), Kröyer in: Danske Selsk. Afh., v.7 
p: 283, 287 | 1894 I, G.O. Sars, Crust. Norway, v.1 p. 587. 


Like Jassa (p. 652), except as follows. Side-plate 2 in d not differently 
shaped from side-plate 3. Gnathopod 2 in the o little larger than gnatho- 
pod 1. Gnathopod 2 in the S with hind margin of the 6% joint not produced 
into a prominent decurrent tooth. 


9 species accepted, 1 obscure. 


Synopsis of accepted species: 


Eyes present — 2. 


h Eyes wanting — 7. 


Uropod 3, rami more than half as long as peduncle 1. Lnanoides . . p.657 
Uropod 3, rami less than half as long as pedunele -— 3, 


wm 


Gnathopod 2 in , 6th joint more than twice as long 

TE EB re RE 2. L anguipes . . p. 658 
Gnathopod 2 in d, 6th joint not more than twice as 

long as broad — 4. 


4 Peraeopods 3—5 rather slender — 5. 
Peraeopods 3—5 rather robust — 6. 


Pleon segment 3, postero-lateral eorners square . . 3. L megacheir . p.659 
Pleon segment 3, postero-lateral eorners round . . 4. L assimilis . . p.659 


Bros Ewa ee en 5. Llatipes .-. . p. 660 


a Eyes unusually large . . . ... 222 20. . . 6. Lmegalops.. . p. 660 


Antenna 1, 1st joint as long as the head . . . . . 7. L tenuicornis . p. 660 


? | Antenna 1, 1st joint not as long as the head — 8. 


nearly as long as 1st Joint of DERBAN  .: . 5. 8. IL. brevicornis . p. 661 
Antennae 1 and 2 long, slender; accessory flagellum 


Antennae 1 and 2 short, robust; accessory flagellum 
® | 
not nearly as long as 1st joint of primary . . . 9. L tuberculatus p. 661 


1. I. nanoides (H. J. Hansen) 1887 Podocerus n., H. J. Hansen in: Vid. Meddel., 
ser.4 v.9 p.162 t.6 f. 4—4b | 1893 Protomedeia maculata (part.), A. Della Valle in: 
F. Fl. Neapel, v.20 p. 436. 


Q. Body elongate, narrow. Head, lateral lobes acute, little produced. 
Side-plates rather small, in figure front lobe of 5th nearly as deep as 4th, 
Pleon segment 3, postero-lateral corners broadly rounded. Eyes rather small, 
reddish. Antennae 1 and 2 long, slender, with long setae. Antenna 1, 24 


Das Tierreich. 21. Lief.: T.R.R. Stebbing, Amphipoda I. 42 


658 Ischyrocerus 


joint very little longer than 34, flagellum 1?/, times as long as 34 joint of 
peduncle, 7- or 8-jointed; accessory flagellum as long as 1° joint of primary, 
1-jointed. Antenna 2 longer, ?/, as long as body; flagellum about 6-jointed. 
Gnathopods 1 and 2 nearly alike; 6" joint not large, oblong, palm very 
oblique, evenly convex, the defining angle not very conspicuous, marked by 
2 palmar spines. Peraeopod 4 much longer than peraeopod 3 and peraeo- 
pod 5 than peraeopod 4; all rather slender. Uropod 3, pedunele rather 
long, longer than pedunele of uropod 2, stout, with long rami, more than 
half as long as peduncle. L. 4—5 mm. — G unknown. 


Baffın Bay (lat. 71° N., long. 59° W.). 


2. I. anguipes Kröyer 1838 I. angvipes, Kröyer in: Danske Selsk. Afh., 0.7 
p. 283 t.3 f. 14a-—-m | 1840 I.anguipes, H. Milne Edwards, Hist. nat: Crust., v.3. p. 56 | 
1859 Podocerus a., R. M. Bruzelius in: Svenska Ak. Handl., n. ser. v.3 nr. 1 p.21 | 1874 
P. a., Buchholz in: Zweite D. Nordpolarf., v.2 p.378 Crust. t.13 f.2; t.14 | 1876 P. a, 
A. Boeck, Skand. Arkt. Amphip., v.2 p. 603 t.27 f.5,6 | 1893 P.a., A. Della Valle in: 
F. Fl: Neapel, v.20 p. 444 t.57 f.18 | 1894 P.a., T. Stebbing in: Bijdr. Dierk., v.17 
p. 44 | ?1845 Gammarus zebra, H. Rathke in: N. Acta Ace. Leop., v. 201 p.74 1.3 f.4| 
1851 Ischyrocerus z., W. Liljeborg in: Öfv. Ak. Förh., v.8 p.23 | 1855 Podocerus z., 
W.Liljeborg in: Vetensk. Ak. Handl., 1853 p.446 | ?1853 Cerapus fucicola, Stimpson 
in: Smithson. Contr., v.6 nr.5p.48 t.3 f.34 | 1855 Ischyrocerus minutus, W. Liljeborg 
in: Öfv. Ak. Förh., v.12 p.128 | 1862 Podocerus eylindricus (err., non Say 1818!), Bate, 
Cat. Amphip. Brit. Mus., p. 256 t. 44 f.4 | 1884 P. falcatus (err., non Cancer (Gammarus) f. 
Montagu 1808!), H. Blane in: N. Acta Ac. Leop., 0.47 p.79 t.9 f.96—101 | ?1889 
P. isopus, A. OÖ. Walker in: P. Liverp. biol. Soe., v.3 p.209 t.11 £. 11—13 | ?1890 P.i., 
A.O. Walker in: P. Liverp. biol. Soe., v.4 p.250 t. 16 £.7 | ?1894 P. megacheir, T. Stebbing 
in: Bijdr. Dierk., v.17 p.44 | 1894 Ischyrocerus anguwipes, I. angvipes + I. minutus, G. 
OÖ. Sars, Crust. Norway, v.1 p.588 t.209; p.589 t.210 f.1 | 1895 I. anguipes + I. m., 
Ohlin in: Acta Univ. Lund., v.31 nr.6 p.56. 


Body rather slender. Head, lateral lobes somewhat obtuse but with a 
minutely projecting point. Side-plates encreasing in depth from 18t—4th in ©, 
but in S 24—4th equal in depth; 5t" with front lobe rather less deep than 4%. 
Pleon segment 3, postero-lateral corners rather obtusely quadrate. Eyes 
small, rounded, dark brown. Antenna 1 about '/, as long as body; 34 joint 
of peduncle much longer than 1°, little shorter than 24; flagellum about 
half as long as peduncle, attaining 9 joints, but often with fewer; accessory 
flagellum shorter than 1° joint of primary, with 2 joints, 24 minute. Antenna 2 
longer, especially in JO; flagellum about as long as ultimate joint of peduncle, 
5—7-jointed. Gnathopod 1 rather feeble, 6!" joint oval, distally narrow; 
the oblique palm defined by palmar spines, finger serrate. Gmathopod 2 in 
SO very large; 5tk joint very small, cup-shaped, 6tk elongate, curved; the 
concave, hirsute hind margin or palm parallel to the convex front, and 
forming near the finger-hinge a truncate, finely denticulate process; the finger 
bulging a little after passing this process; palm margin occasionally straight 
or even a little convex. Gnathopod 2 in Q similar to gnathopod 1, but 
more robust. Peraeopods 1—5 rather strongly built. Peraeopods 3—5, 
24 joint oblong oval, hind margin smooth or crenulated; finger miero- 
scopieally pectinate for some distance. Uropod 3, pedunele long, rami 
short, outer tapering, tipped with small spines, inner (not outer) rather 
broader, apically bent, having on upper margin 3 or 4 denticles. Telson 
little longer than broad, obtusely triangular, with dorsal transverse row of 
1—4 slender spines on each side. Colour very variable. L. 4—15 mm. 

Arctic Ocean (widely distributed); North- Atlantic, North-Sea and Skagerrak (Norway 
and Bohuslän; Grand Manan; Liverpool Bay?); Kattegat; West Baltie, depth 18 m. 


u nun nl a al 


Ischyrocerus 659 


3. I.megacheir (Boeck) 1871 Podocerus m., A. Boeck in: Forh. Selsk. Christian., 
1870 p.247 | 1876 P.m., A. Boeck, Skand. Arkt. Amphip., v.2 p.602 t.29 f.4 | 1893 
‚Podoceropsis m. (part.), A. Della Valle i in: F. Fl. Neapel, v.20 p.453 | 1894 Ischyrocerus M., 
6. O. Sars, Crust. Norway, v.1 p.592 t.211 | ?1895 I. m., A. M. Norman in: Ann. nat. 
Hist., ser. 6 v.15 p.492. 


Body rather long and slender. Head, lateral lobes acute. Side-plates 
not very deep, 1° quadrate in front, 4!" scarcely larger than 34, 5tk nearly 
as deep as 4, Pleon segment 3, postero-lateral corners quadrate. Eyes 
rather large, rounded oval, light brown. Antennae 1 and 2 about °/, as 
long as body, with long setae, antenna 2 rather the longer. Antenna 1, 
1s joint shorter than head, ga elongate, as long as 24 or a little longer; 
flagellum longer than 32 joint of pedunele, with 9—10 joints in S and 
4—8 in O; accessory flagellum as long as 1° joint of primary, with 
minute 24 joint. Antenna 2, ultimate joint of pedunele longer than 


_ penultimate, shorter than flagellum, which has 8—11 joints. Gnathopod 1, 


6 joint oval, with palm ill-defined, larger in CS than in Q. Gnathopod 2 
in d, 6! joint large and tumid, about thrice (or less) as long as broad; 
palm slightly flexuous and a little cerenulate, defined by an obtuse angle 
with small palmar spines; finger strong, apex impinging within border of 
palm. Gnathopod 2 in oO similar to gnathopod 1, but with shorter 5!" and 
more oblong and stouter 6! joint. Peraeopods us slender; 24 joint in 
peraeopods 3—5 oblong oval, narrowing downward. Uropod 3, pedunele 
elongate, outer ramus but slightly hooked at the tip, with 1 denticle on 
upper edge. Telson as long as broad, with 2 setae on each side of sub- 
acute apex. Colour whitish, pellueid, with light transverse orange bands 
L. 7”—12 mm. 


Arctie Ocean and North-Atlantie (Norway, Iceland, Bear Island, Spitzbergen). 
Depth 100—1444 m. 


4. I.assimilis (O.Sars) 1879 Podocerus a., G.O.Sars in: Arch. Naturv. Kristian., 
v.& p.450 | 1885 P.a., G. O. Sars in: Norske Nordhavs-Exp., v.6 Crust. I p. 205 t.17 
f. 1a—e | 1893 Podoceropsis megacheir (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.453. 


Body rather elongate. Head, lateral lobes acutely produced. Side- 
plates of moderate depth, 1° rounded in front, 5tk notably not so deep 
as 4{h, Pleon segment 3, postero-lateral corners obtusely rounded. Eyes 
rather small, longitudinally oval, dark brown. Antennae 1 and 2 powerful, 
subequal, more than half as long as body. Antenna 1, 1° joint as long as 
head, 24 and 34 much longer, equal; flagellum longer than 34 joint of 
pedunele, 9-jointed; accessory flagellum 1-jointed, very small, scarcely more 
than "/, as long as 1° joint of primary. Antenna 2, ultimate joint of peduncle 
rather longer than penultimate, both elongate, flagellum as long as ultimate, 

8-jointed. Bussaeped 1, 6% joint oval, palm quite undefined, unless by extent of 
finger. Gmnathopod 2, especially in d ‚ powerful, 6! joint very large and 
tumid, as-long as 4 preceding joints together, oblong oval; the long nearly 
straight hind or palmar margin fringed with partly plumose setae; finger 
strong, faleiform, closing upon inner surface of hand. Peraeopods 3—5, 
24 joint oblong; peraeopod 4 much longer than 34, 5th than 4. Uropod 3, 
peduncle rather elongate, rami remarkably small. Telson short, but thick, 
tubular. Colour whitish, with brown spots or shadings. L. reaching 8 mm. 


North-Atlantie and Arctic Ocean (west of Helgeland, er 850 m; south of 
Bear Island, depth 66 m). 


42% 


660 Ischyrocerus 


5. I, latipes Kroyer 1842 I.1., Kroyer in: Naturh. Tidsskr., v.4 p.162 | 1893 
I.1., A. Della Valle in: F. Fl. Neapel, 0,20 p.450 t.57 £.19 | 1894 T. I, @. O. Sars, 
Crust. Norway, v.1l p.591 | 1862 Podocerus l., Bate, Cat. Amphip. Brit. Mus., p. 257 | 
1876 P.l., A. Boeck, Skand. Arkt. Amphip., v.2 p.600 t.29 f.1 | 1887 P.l.,, H.J. 
Hansen in: Vid. Meddel., ser. 4 v.9 p.161 t.6 £.3—3b. 


Body elongate, depressed, back broad. Head, lateral lobes rounded. 
Side-plates 3 and 4 much larger than 24, 5th much less deep than the 4th, 
Pleon segment 3, postero-lateral corners quadrate. Eyes obliquely oval, not 
large. Antenna 1 more than half as long as body, setose, 1° joint about 
as long as head, 24 much longer, 34 as long as 24; flagellum scarcely 
longer than 34 joint of peduncle, 9-jointed; accessory flagellum 1-jointed, 
about half as long as 1% joint of primary. Antenna 2 longer, ultimate joint 
of pedunele little longer than penultimate, flagellum little longer than 
ultimate, 7-jointed. Maxillipeds, palp (Boeck) elongate, the 34 joint (in figure) 
more than twice as long as broad. Gnathopod 1, 5tb joint distally widened 
and setose, 6th oval, nearly triangular, '/, longer than broad, palm convex; 
finger long, curved, serrate. Gnathopod 2 in d much larger, 5tk joint very 
short, eup-shaped, 6!" not twice as long as broad, oval, plump; hind and 
palmar margin evenly convex, fringed with setae; finger long and curved. 
Gnathopod 2 in 9 (Hansen), 6! joint very short and broad, palm oblique, 
long, with an emargination, defining angle rounded. Peraeopods 3—5, 24 
joint broad, in peraeoped 3 longer than broad. Uropod 3, pedunele very 
long, rami very short, the outer (Boeck) having 2 blunt teeth on the end, 
inner without teeth. Telson longer than broad, oval, apically pointed, with 
a spine on each side of the apex. L. 14—15 mm. 


Arctic Ocean (Greenland). Depth 15—188 m. 


6. I.megalops O.Sars 1894 I. m., G.O.Sars, Crust. Norway, v.1 p. 591 t.210 f.2. . 


©. Body not very slender but somewhat compressed. Head, lateral 
lobes angular. Side-plates rather large, 5!t much less deep than 4 Pleon 
segment 3, postero-lateral corners obtusely quadrate. Eyes unusually large, 
rounded oval, dark. Antennae 1 and 2 rather strongly built. Antenna 1 
about half as-long as body; 1° joint shorter than head, 24 and 34 not 
very long, but each longer than 1%; flagellum longer than 39 joint of 
peduncle, 8-jointed; accessory flagellum extremely minute, not nearly half 
as long as 1° joint of primary. Antenna 2 scarcely longer than antenna 1; 
ultimate joint of peduncle a little longer than penultimate, flagellum sub- 
equal to penultimate, 6-jointed. Gmathopods 1 and 2 rather stout and similar, 
but gnathopod 2 much the larger; 6'% joint broad, oval; palm oblique, simple, 
defined by a slightly marked angle, with several palmar spines. Peraeo- 
pods 1—5 rather stout; 24 joint in peraeopod 3 very broad proximally. 
Uropod 3 nearly as: in I. anguipes (p. 658). Telson triangular, with a few 
simple dorsal setae, apex obtusely pointed. Colour whitish, with indistinet 
brownish bands. L. 7 mm. 


Aretie Ocean (Hammerfest [Norway]). On hydroids; depth about 75 m. 


7. I. tenuicornis (0. Sars) 1879 Podocerus longicornis (err., non Cam. Heller 
18661), G.O. Sars in: Arch. Naturv. Kristian., v.4 p.461 | 1885 P. tenuicornis, G. O. 
Sars in: Norske Nordhavs-Exp., v.6 Crust. I p. 209 t. 17 f.3 | 1893 Podoceropsis sophiae 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 452. 


Body rather compressed. Head, lateral corners greatly produced, acute, 
Side-plates well developed, front lobe of 5tk notably less deep than 4, 


Ischyrocerus 661 


Pleon segment 3, postero-lateral eorners acute. Eyes wanting. Antennae 
1 and 2 nearly as long as body, with long setae. Antenna 1, 1° joint 
longer than head, 24 much longer than 1%, 34 nearly as long as 24; 
flagellum with 5 elongate joints; accessory flagellum 1-jointed, half as long as 
1° joint of primary. Antenna 2, ultimate joint of pedunele long, slightly 
shorter than penultimate; flagellum as in antenna 1. Gnathopods 1 and 2 
rather feeble, 6! joint oval, without spines, merely furnished with delicate 
bristles; 24 gnathopod not much larger than 1°. Peraeopods 3—5 almost 
equal in length; 24 joint oblong oval. Uropods 1—3 slender. Colour uniform 
white. L.3 mm. 


Arctic Ocean (north-west of Finmark). Cold area; depth 2090 m. 


8 L brevicornis (O. Sars) 1879 Podocerus b., G. OÖ. Sars in: Arch. Naturv. 
Kristian, v.4 p.460 | 1882 P. b., Hoek in: Niederl. Arch. Zool., suppl. 1 nr. 7 p.63 | 
1885 P. b., G. O. Sars in: Norske Nordhavs-Exp., v.6 Crust. I p. 207 t.17 f. 2a —c | 1893 
Podoceropsis sophiae (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 452. 


Body rather stout. Head, lateral lobes acute. Side-plates pretty well 
developed, 5t% notably less deep than 4. Pleon segment 3, postero-lateral - 
corners quadrate. Eyes wanting. Antennae 1 and 2 short, robust, not half 
as long as body, with short setae. Antenna 1, 1° joint shorter than head, 
34 longer than 1°, shorter than 24; flagellum 7- or 8-jointed; accessory 
flagellum 1-jointed, nearly as long as 1° joint of primary. Antenna 2, 
flagellum shorter than ultimate joint of peduncle, 6- or 7-jointed. Gmnatho- 
pods 1 and 2 robust, similar, but 24, especially in J, considerably larger; 
6!h joint broad, compressed, the oblique palm well defined from the. hind 
margin, with powerful palmar spines in gnathopod 1, and a distinet angular 
projection in gnathopod 2. , Peraeopods 3—5, 24 joint rather broad, especially 
in peraeopod 5. Uropods 1—3 not very elongate, in particular uropod 3. 
Colour whitish. L. 6—9 mm. 


North-Atlantie and Arctie Ocean (Storeggen Bank and in open sea; lat. 63° N., 
long. 5° E.; round Bear Island and Spitzbergen, depth 275—1444 m; lat. 74° N., long. 
45° E., depth 801 m). 


9. L.tuberculatus (Hoek) 1882 Podocerus t., Hoek in: Niederl. Arch. Zool., 
suppl. I nr. 7 p.64 t.3 f.32 | 1893 P.t., A. Della Valle in: F. Fl. Neapel, v.20 p. 443 
t.57 £.17|1894 P. t., T. Stebbing in: Bijdr. Dierk., v.17 p.44 | 1888 P. hoeki, T. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 1136 t. 120. 


Head, lateral lobes obtuse with minute point in front. Side-plate 4 
the largest. Pleon segment 3, postero-lateral corners obtusely quadrate. 
Eyes wanting. Antenna 1, 34 joint a little longer than 1°, decidedly 
shorter than 24; flagellum 6-jointed, longer than 34 joint of peduncle; 
accessory flagellum half or less than half as long as 1° joint of primary, 
1-jointed. Antenna 2 longer, ultimate joint of peduncle slightly longer 
than penultimate or than the 5-jointed flagellum. Gmnathopod 1, 5t% joint eup- 
shaped, 6!" broad, proximally oblong, but narrowing distally; the palm longer 
than hind margin, very oblique, straight, finely serrate, defined by palmar 
spines, among which the curved serrate finger closes. Gnathopod 2 in 9 like 
gnathopod 1, but with the 6% joint larger, and in the S of the same general 
character, but with 5tk joint comparatively smaller, 6!" large, more oblong, with 
the palm obliquely sinuous, irregularly tuberculate, defined by a small tooth, 
within which the broad, somewhat denticulate finger closes. Peraeopods 1 
and 2 rather stout. Peraeopods 3—5, 2% joint oblong, in peraeopod 4 narrowing 
distally. Uropod 3 rather short, peduncle about 2'/, times as long as rami, 


Naala a ee En a Tr ER a Ta 


“= re 
a 


662 Ischyrocerus, Corophiidae 


of which one is apieally bent, but apparently without any row of denticles 
on the upper edge. Telson rounded triangular. L. 5 mm. 


Barents Sea (lat. 71°—77° N., long. 50° E., depth 126—320 m); South-Paeifie 
(lat. 40° S., long. 178° E., depth 2071 m). 


I. monodon (Heller) 1866 Podocerus m., Cam. Heller in: Denk. Ak. Wien, 
v.2611 p.45 1.4 f.4,5| 1893 P. falcatus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 445. 


Finger of gnathopod 2 not dentieulate. L. 5 mm. 
Adriatie (Lesina). 


38. Fam. Corophiidae 


1849 Corophidae, J.D. Dana in: Amer. J. Sei., ser.2 «.8 p.139 | 1876 C., 
A.Boeck, Skand. Arkt. Amphip., v.2 p.619 | 1888 Corophiidae, T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.1154 | 1894 C., G. O. Sars, Crust. Norway, v.1 p. 606 | 1893 Corofidi 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 351. 


Body usually more or less depressed. Pleon small. Side-plates usually 
small and often not in continuity. Antennae 1 and-2 of variable pro- 
portions, with or without accessory flagellum. Mouth-parts generally normal, 
except that mandibular palp is not always 3-jointed, and the inner plate of 
maxilla 1 is sometimes evanescent. Gnathopods 1 and 2 variable in character 
and relative proportions. Peraeopods 1 and 2 usually glandular. Peraeopod 5 
the longest. Pleopods often with peduncle internally expanded. Uropod 1 
biramous. Uropod 2 biramous or uniramous. Uropod 3 small, weakly biramous, 
uniramous, or even without rami. Telson simple (Fig. 115, 118 p. 686, 691), 
sometimes lobate. 

Marine, but extending into brackish or even almost fresh water, 


11 genera, 44 accepted species and 11 doubtful. 


Synopsis of genera: 
Uropod 3 without ramus .... 2... 1. Gen. Concholestes . p. 663 
Uropod 3 (Fig. 115, 118) not without ramus — 2. 


R 
[ Mandibular palp 3-jointed -— 8. 


10) 


Mandibular palp not 3-jointed — 10. 


Uropod 3, inner ramus distinet — 4. 
Uropod 8, inner ramus wanting or not arti- 
eulated — 5. 


J Side plates in continuity . ». 2..... 2. Gen. Paracorophium p. 663 
\ Side plates not in continuity . -» .. 2... 3. Gen. Camacho . . . p.664 


3 


j Uropod 2 uniramous — 6. 
\ Uropod 2 biramous — 7. 


| Gnathopod 2 (Fig. 112) in Z, and not gnatho- 


5 


6 pod 1, complexly subehelate ...... 4. Gen. Cerapus . . . p.665 
| Gnathopod 1 in $, and not gnathopod 2, eom- 
plexly subehelate -... un... 2%... % 5. Gen. Chevreuxius . p.669 
j Antenna 1 without accessory flagellum — 8. ; 
ntenna 1 with accessory flagellum — 9. 
\ Ant 1 with y flagell 
j Gnathöpod 2 in & complexly subehelate . . 6. Gen. Eriethonius . . p. 670 


\ Gnathopod 2 in & simply subchelate or chelate 7. Gen. Cerapopsis . . p.674 


g | Antennae very elongate . . . . ...... .. 8.Gen. Neohela . . . p.675 
\ Antennae not very elongate . ... 2... 9. Gen. Uneiola . . . p.676 


Corophiidae, Concholestes, Paracorophium 663 


10 Mandibular palp 1-jointed . . .: 2...» 10. Gen. Siphonoecetes p.681 
Mandibular palp 2-jointed ..».. 2.2... 11. Gen. Corophium . . p.685 


1. Gen. Concholestes Giles 


1888 Concholestes (Sp. un.: C. dentaliü), G.M.Giles in: J. Asiat. Soc. Bengal, 
0.57 p.237 | 1890 C©., G. M. Giles in: .J. Asiat. Soc. Bengal, v.59 p. 63 | 1893 C., Siphon- 
oecetes (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.895, 924. 


Mouth-parts imperfectly known; otherwise agreeing with Siphonoecetes 
(p. 681), except that uropod 2 is uniramous, and that uropod 3 has no ramus. 


1 species. 3 


1. C. dentalii Giles 1888 C.d., G.M.Giles in: J. Asiat. Soc. Bengal, v. 57 
p.238 t.7 £.7—11 | 1893 €. d., Siphonoecetes (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 
p. 895, 924 | 1890 €. dentallii, G. M. Giles in: J. Asiat. Soc. Bengal, v.59 p. 63. 


Body slender, head and peraeon thrice as long as pleon; peraeon segment 1 
dorsally produced in a small setose lobe over base of head. Head almost 
truncate in front, but with 2 little median points. Side-plates as in Siphon- 
oecetes (p.681). Eyes very small, on front angles of head. Antenna 1 stout, less 
than half as long as body, setose, flagellum as long as 24 joint of peduncle, 
5-jointed. Antenna 2 very stout, nearly as long as peraeon, setose; ultimate 
and penultimate joints of peduncle subequal; flagellum short and stout, 
2-jointed, ending in 2 curved spines. Mandible of simple form and palpate, 
maxillipeds small and unguieulate.  Gnathopod 1 feebly subchelate; 5" joint 
slightly longer and broader than 6%, which is described as without palm, 
the grasping power Iying between the stiffish hairs of its hind margin and 
the serrate finger. Gnathopod 2 little longer but much stouter; 5! joint 
short, broad, cup-shaped, 6!" swollen at the base, hind margin very short, 
palm oblique, strongly armed with 3 formidable teeth; finger stout, strongly 
serrate, while a powerful secondary tooth projects obliquely on either side, 
nearly as strong as the central tooth, and giving the finger a trifid appearance. 
Peraeopods 1 and 2 short, 24 joint expanded, finger long and straight. Peraeo- 
pods 3 and 4, 24 joint narrow, 5th stout, cylindriec, armed at apex with 1 
short stout spine, the rounded apex being also densely clothed with short 
reeurved hooks; ‘the retroverted 6% joint attached to front margin of 5th; 
finger forming a small but strong hook. Peraeopod 5 longer, normal, 24 joint 
not much expanded, distally tapering. Marsupial plates narrow, fringed with 
long setae. Pleopods 1—3 small, peduncle much broader than long. Uropod 1, 
peduncle stout, armed with a few stout spines, rami half as long as peduncle, 
stout, spinose. Uropod 2 shorter, peduncle very short, broad; ramus rounded, 
with apical recurved hooks. Uropod 3 short, blunt, apically spiniferous. 
L. about 8 mm. 

Bay of Bengal (off the Seven Pagodas, near Madras). Depth 13 m, on a sandy 
bottom.‘ Makes its home in the shell of Dentalium lacteum, lining it with cemented 
sandy particles. 


2. Gen. Paracorophium Stebb. 


1899 Paracorophium (Sp. un.: Corophium excavatum), T. Stebbing in: Ann. nat. 
Hist., ser. 7 0.3 p.350. - 


Body eompressed. Head with produced lateral lobes. Side-plates 
continuous, 1° not produced forward. Eyes small, on lateral lobes of head. 
Antenna 1 slender, without accessory flagellum; flagellum with several’ joints. 


664 Paracorophium, Camacho 


Antenna 2 robust; flagellum slight, of more than 3 joints. Mandible with 
3-jointed palp. Gnathopod 1 as in Corophium (p. 685). Gmathopod 2 nearly 
as in Corophium, but the long process of 4! joint fringed on its front or 
inner margin, while the 5" is fringed on its hind margin, the 2 joints there- 
fore, though fitting together, having no look of coalescence; 6t% joint with 
small palm. Peraeopod 3 the shortest, setose; 6!" joint with strong spines. 
Peraeopods 4 and 5 successively much longer. Peraeopods 3—5, 24 joint 
widely expanded. Uropod 1, and still more uropod 2, stout, with strong 
spines, biramous. Uropod 3 small, outer ramus nearly as long as peduncle, 
“ inner oval, minute. Telson entire, short. 

l species. 


1. P. excavatum (G. M. Thoms.) 1884 Corophium e., G. M. Thomson in: Tr. 
N. Zealand Inst., v.16 p.236 t.12 f. 1-8 | 1899 C. e., Paracorophium, T. Stebbing in: 
Ann. nat. Hist., ser. 7 v.3 p. 241, 350. 

Pleon segments 4 and 5 are dorsally coalesced (in figure). Head with 
small rostral point, lateral lobes narrowly rounded. Eyes small, round, on 
lateral lobes. Antennae 1 and 2 subequal, more than '/;, as long as body. 
Antenna 1, 1% and 24 joints long, 1% much the longer (figure), 34 very 
short; flagellum as long as peduncle, 10-jointed. Antenna 2, joints of peduncle 
short and thick; flagellum short, 6-jointed. Mandibular palp longer than trunk, 
1° joint rather long. Gmnathopod 1 rather small, 3% joint short, with tuft 
of long setae, 4" very short, 5th long, fringed with long setae on hind 
margin, 6% rather shorter, slightiy widened distally; palm transverse, finger 
scarcely overlapping it. Gnathopod 2 rather longer, slender; 4" joint produced 
into a scoop-like process, fringed on each margin with long setae, and into 
which the carpus [5 joint] is fitted elosely when the limb is folded; 5t% joint 
slightly widened distally, densely fringed along hind margin, 6!" subequal to 5th, 
margins nearly parallel, hind produced into a small tooth; palm transverse, 
sinuous, much overlapped by the finger. Peraevpods 1 and 2 rather short, 
simple, nearly destitute of spines or setde. Peraeopod 3, 24 joint piriform, 
4th Jonger than 5th or 6th, 6 with a row of strong spines along the reverted 
front margin; finger short. Peraeopod 4 twice as long as 34; peraeopod 5 
still longer, finger as in 34 and 4b reverted. Uropods 1 and 2 each with 
strong spines on pedunele and rami. Uropod 3 with peduncle as broad as 
long, and carıying a few setae but no spines; inner ramus not half as long 
as outer. Telson broader than long, apically rounded. Colour dirty grey. 
L. 4 mm. 

New Zealand (Brighton Creek (salt water) near Dunedin). 


3. Gen. Camacho Stebb. 


1888 Camacho (Sp. un.: ©. bathyplous), T. Stebbing in: Rep. Voy. Challenger, 
v.29 p. 1178. 

Head, mouth-parts, peraeon with its side-plates and gnathopods 1 and 2 
(9) nearly as in Xenodice (p. 699), but differing as follows. Mandible with 
spines in spine-row numerous. Maxilla 1, inner plate with a single apical 
seta. Maxillipeds with finger of palp as long as the 34 joint. Antenna 1 
with elongate 1° joint (the rest unknown). Pleon segment 4 not especially 
elongate. Pleopods, peduncle distally widened. Uropods 1—3 biramous. 
Uropod 3 with short broad peduncle and small rami, the outer longer than 
the pedunele, the inner minute. Telson simple. 

1 speeies. 


Kun: 


Camacho, Cerapus 665 


1. C. bathyplous Stebb. 1888 C. b., T. Stebbing in: Rep. Voy. Challenger, 
0.29 p. 1179 t. 197. 


Oo. Body elongate, head and peraeon subdepressed, pleon compressed; 
peraeon segments 3—7 laterally dimpled. Head, lateral lobes very small, 
subaeute. Side-plates all shallow, for the most part not contiguous, 18 — 41h 
with front corner direeted forward. Pleon segment 3, postero-lateral corners 
obtusely quadrate. Eyes wanting. Antenna 1, 1° joint considerably longer 
than the head. Antenna 2, antepenultimate. joint of peduncle at least half 
as long as 1° joint of antenna 1. Upper lip broad. Mandible, 10 spines 
in spine-row; spines of 34 joint of palp very elongate. Maxilla 1, outer 
plate with 11 spines, 24 joint of palp with 8 apical spine-teeth. Gmatho- 
pods 1 and 2, 34 and 4! joints short, 5th but little shorter than 24, rather 
longer and narrower than the oval 6t%,”both strongly armed, with slender 
pectinate spines; finger matching the convex ill-defined palm; 24 and 5t" joints 
longer in gnathopod 2 than in gnäthopod 1. Branchial vesicles and marsupial 
plates narrow. Pleopods 1—3, peduncle short, the members of each pair 
meeting distally; slender rami wide apart; coupling spines much dentate, 
eleft spines long; 1° joint of inner ramus dilated proximally. Uropod 1, 
peduncle longer than outer ramus. Uropod 2 shorter, peduncle rather longer 
than the subequal, spinose rami. Uropod 3, pedunele almost broader than 
long, expanded beyond the rami, the pair meeting under the telson. : Telson 
rather broader than long, nearly eircular, but with a produced angle on 
each side of the convex apex. L. 16 mm. 


South-Paeifie (lat. 419 S., long. 178% E.). Depth 2011 m. 


4. Gen. Cerapus Say 


1817 Cerapus (Sp. un.: ©. tubularis), Say in: J. Ac. Philad., v. 11 p. 49 | 1888 
C., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 100, 1157 | 1898 C., A. Della Valle in: 
F. Fl. Neapel, v.20 p. 376 | 1894 ©., 6. O. Sars, Crust. Norway, v.1 p. 606 | 1840 Cera- 
podina (Sp. un.: ©, abdita), H. Milne Edwards, Hist. nat. Crust., v.3 p. 62. 


Body slender; depressed pleon small, its after part strongly flexed. 
Head with distinet rostrum; eyes at lateral eorners. Side-plates 1—4 very 
small, 5th and 6th larger, 5th—7th pilobed, front lobe the deeper. Antenna 1 
without accessory flagellum. Antennae 1 and 2, flagellum short. Upper 
lip not bilobed. Mouth-parts normal. Mandible, 34 joint of palp fully as 
long as 24, Maxilla 1, inner plate not or little setose, outer with 9 or 10 
apical spines. Maxilla 2, inner plate not fringed on inner margin. Gmnatho- 
pod 1 subchelate.e Gmnathopod 2 (Fig. 112 p. 667) complexly subchelate 
and powerful in S, in O feeble and simple. Peraeopods 1 and 2 (Fig. 113 
p. 667) short, 24 joint broad and long, glandular, front margin convex, base 
of joint expanded in peraeopod 1. Peraeopods 3—5 short, recurved, finger 
very short, bidentate. Peraeopod 3 (Fig. 114 p. 667), 24 joint rather expanded, 
short, 4th distally expanded on both sides of 5th, Peraeopods 4 and 5, 
24 joint variable as to expansion. Branchial vesicles narrow, attached only 
to peraeopods 1—3. Marsupial plates 1—3 narrow, 4% large. Pleopod 1 
large, 24 and 34 guccessively smaller, with 1 ramus dwindled. Uropod 1 
normal. Uropods 2 and 3 uniramous, the ramus short, uncinate. Telson 
short, broad, bilobed, densely spinulose above. It is doubtful whether all 
the above characters are certainly applicable throughout the genus. 


6 species. 


666 Cerapus 


Synopsis of species: 


1 Antenna 1, 1st joint distally widened — 2. 
Antenna 1, 1st joint not distally widened — 3. 


9 f Antennae 1 and 2, flagella 2-jointed.... . . 1. C. erassieornis . . p. 666 
\ Antennae 1 and 2, flagella 4- or 5-jointed . . . 2. C.sismithi . . . p.666 
3 f Antennae 1 and 2, flagella 3-jointed. .... . 3. C. tubularis . . . p. 667 
\ Antennae 1 and 2, flagella 4—6-jointed — 4. 
Antenna 1, 3d joint of peduncle much longer 
4 | LITT RE RR SE BEN, OR 4. C. flindersi . . . p.668 
- = ) Antenna 1, 3d joint of pedunele not much longer 
0» than 2d — 5. 
Gnathopod 2 in d, inner tooth of 5th joint 
5 | prominent, aeufe, =... Silea nn a0 5. C. abditus . . . . p.668 
Gnathopod 2 in 5, inner tooth of 5th joint not 
”. DRDMERONE, ODIRBO 2 00 reine an 6. C. calamicola . . p. 669 


1. C. erassicornis (Bate) 1857 Siphonocetus c., Bate in: Ann. nat. Hist., ser. 2 
v.19 p.149 | 1862 Siphonoecetes c., Bate & Westwood, Brit. sess. Crust., v.1 p.469 f. | 
1882 Cerapus c., G. O.Sars in: Forh. Selsk. Christian., nr. 18 p.113 1.6 f.8 | 1893 ©. c., 
A. Della Valle in: F. Fl. Neapel, v.20 p.378 t.55 f.52 | 1894 C. c., G. O. Sars, Crust. 
Norway, v.1 p. 607 t. 217. 


Peraeon segments 1 and 2 in © shorter than any of the following 5; 
but in S segment 1 is not shorter and segment 2 much longer. Head, 
rostrum rather large, acute; lateral lobes short, obtuse. Side-plate 5 much 
the largest, its front lobe broad and deep. Pleon segment 3, postero-lateral 
corners rounded. Eyes small, round, dark. Antennae 1 and 2 very setose, 
short, subequal. Antenna 1 the stouter, slightly the longer, nearly '/, as 
long as body; 1° joint about as long as 24 and 34 combined, much broader, 
widened distally and produced to a triangular lobe over 24 joint, which is 
as long as 3; flagellum scarcely longer than 34 joint of peduncle, with 2 joints, 
last minute. Antenna 2, ultimate and penultimate joints of pedunele sub- 
equal; flagellum as in antenna 1. Gnathopod 1, 5tk joint nearly as long as 
6%, distally wide with setose lobe, 6! wide at base; palm oblique, scarcely 
defined; finger long. Gmnathopod 2 in GC, 24 joint expanded to a broad 
oval, 5tk large, scarcely widening distally, front margin sinuous, partially 
serrate, hind margin produced near centre to a strong tooth, distally forming 
a transverse palm, defined by a tooth with smaller one within; 6tk joint 
shorter, much narrower, projecting finger-wise over palm of 5%, while the 
long finger impinges on middle tooth of 5%, Gnathopod 2 in Q feeble, 24 joint 
slightly widened; 5t joint triangular, broader'than the narrowly oval or fusiform 
6", which is without distinet palm. Peraeopods 4 and 5 with 24 joint little 
expanded, especially that of peraeopod 5. Uropod 1, outer ramus much 
larger than inner, outer margin spinulose. Uropod 2 only about half as 
long as 1%, ramus oblong oval. Uropod 3, peduncle rather thick, ramus 
extremely minute. Telson with 2 dorsal rows of sharp, upturned spinules. 
Colour pale yellow. L. 0 4, 0 5 mm. 

Inhabits a free membranous tube, eylindrical, open at both ends, 1st joint of 
antenna 1 acting as an operculum. 


North-Sea (Northumberland; Jaederen [Norway], depth 75—94 m). 


2. C. sismithi Stebb. 1888 ©. s., T. Stebbing in: Rep. Voy. Challenger, v. 29 
p. 1158 t.124 | 1893 C. s., A. Della Valle in: F. Fl. Neapel, v.20 p.379 t.55 f.53—57 | 
1894 CO. s., G. O. Sars, Crust. Norway, v.1 p. 607. 


EEE, 


en 2 dr me an u 
ae ci 


Cerapus 667 


oO unknown. — G. Peraeon segment 2 not longer than any of the 
succeeding peraeon. segments. Head, rostrum acute, slightly depressed, 
reaching beyond the slightly rounded lateral lobes. Side-plate 5 very broad, 
front lobe rather deeper than in the other side-plates. Eyes small, round. 
Antenna 1 less than half as long as body; 1° joint shorter than 24 and 34 


. combined, distally widened; rounded process above produced over 24 joint, 


process below acute; 3° joint shorter than 24; ; Nagellum rather longer than 1°* as 


24 joint 


4a joint - 
st joint -- 


Fig. 112. . Fig 113. Fig. 114. 
Gnathopod 2. Peraeopod 1. Peraeopod 3. 


Fig. 112—114. C.sismithi, Q. 


of peduncle, 5-jointed. Antenna 2 a little longer, ultimate and penultimate 
Jjoints of peduncle subequal; flagellum longer than ultimate joint of peduncle, 
4-jointed. Gnathopod 1, 5th joint distally rather wider than 6%, which is 
widest near base; palm. serrate, finely pectinate; finger oceupying apex of 
6 joint, pectinate and with decurrent subapical tooth. Gnathopod 2 
(Fig. 112), 24 joint widest near base, subrectangular, 5!" much broader and 
longer than 24, wide at base, much wider distally; front margin sinuous, hind 
rather longer, ending in a tooth, a large convex denticulate process oceupying 
its palmar or distal margin between the tooth and base of strap-shaped, 
much curved 6!" joint, which is nearly as long as 5tt, 4—5 times as long 
as broad, with tooth near base and adpressed teeth or spines near apex of 
inner margin; finger less than '/, as long as 6!" joint. Peraeopod 1 (Fig. 113), 
the large 24 joint widest above, proximal front angle broadly rounded, 
4 joint much longer than broad. Peraeopod 2, 24 joint broadly oval, 
4th and 5% joints longer than in peraeopod 1. Peraeopods 4 and 5, 24 joint 
well expanded, though successively rather narrower and longer than 24 joint 
of peraeopod 3. Peraeopod 3 see Fig. 114. Uropods 1-3 and telson as 
in C. erassicornis. L. 3 mm. 
In eylindrical tubes of sand. 
Cumberland Bay [Kerguelen Island]. Depth 226 m. 


3. C.tubularis Say 1817 ©. t., Say in: J. Ac. Philad., v. 11 p. 50, 96 1.4 f.7—11| 
1880 C. t., S.I. Smith in: Tr: Connect. Ac., v.4 p.277 t.2a | 1888 C. t., T. Stebbing in: 
Rep. Voy. Challenger, v.29 p.101, 522 | 1893 C.t., A. Della Valle in: F. Fl. Neapel, 
».20 p.378 1.55 f.46—51 | 1894 ©. t., G. O. Sars, Crust. Norway, v.1 p. 607. 


Body broad, depressed, shallow, in J tapering slightly and continu- 
ously from head to telson, in Q 4 and 5th peraeon segments each about 


668 Cerapus 


twice as long as 1° or 7%, Head with slight dorsal carina in front, rostrum 
small. Side-plate 5 the largest. Eyes small, black. Antennae 1 and 2 
subequal, shorter in Q than in d. Antenna 1 in © rather more than half 
as long. as body; 1°t joint stout, laterally compressed, lower margin with 
carina prominent near base, 24 and 34 subequal, each rather longer than 
1°: and subequal to 3-jointed flagellum; 1° joint of flagellum rather longer than 
24 and 34 combined. Antenna 2 slightly shorter, scarcely stouter; ultimate 
joint of pedunele a little longer than penultimate, flagellum scarcely as long 
as ultimate, 3-jointed, 1° joint considerably longer than 24 and 34 combined. 
Gnathopod 1 about as in C. sismithi (p. 666). Gnathopod 2 in C in general 
shape as in C. sismithi, but front margin of 5tk joint convex, tooth of hind 
margin more produced, its palmar margin shorter, occupied by a cavity and. 
a small tooth near the base of the 6% joint, which is only about twice as 
long as broad, hind margin irregular, minutely denticulate, finger stout, 
serrulate, rather shorter than 6!" joint. Peraeopod 1 in d, the large glandular 
24 joint reetangular, widest proximally, the projeeting front angle narrowly 
rounded; 4! joint broader than long, 5!" a little shorter, nearly square. 
Peraeopod 2 in S, 24 joint broader in the middle, other joints as in peraeo- 
pod 1. Peraeopod 1 in ©, 24 joint proportionally broader than in JS, and 
angle different. Peraeopod 2 in Oo, 24 joint broader and more oval in outline 
than in d. Peraeopod 3, 4! joint with long, narrow, spatulate process 
behind, tipped with 1 short and 3 long plumose setae; the process overlapping 
the 5th joint, which is shaped like it and is apically squamose, carrying 1 seta. 
Peraeopod 4, 24 joint about as long as 4th, longer than broad. Peraeopod 5 
a little more slender. Rest like ©. erassicornis (p. 666). Colour almost black 
from erowded specks of dark purplish pigment, extremities of appendages 
eolourless, semi-translucent. L. 4—5 mm. 


Tube free, reaching 7 mm, black, eylindrical, slightly enlarged at one or 
both ends. 


North-Atlantie (Egg Harbor [New Jersey]; Vineyard Sound, depth 15—19 m; 
Noank Harbor [Conneetieut]). 


4. C. flindersi Stebb. 1888 ©. f., T. Stebbing in: Rep. Voy. Challenger, v. 29 
p. 1163 t.125 | 1893 C. f, A. Della Valle in: F. Fl. Neapel, v.20 p.380 | 1894 C. f, 6 
©. Sars, Crust. Norway, v.1 p. 607. 


o. Nearly allied to ©. tubularis (p. 667). Antenna 1, 24 joint much shorter 
than 1% or 34 joint; flagellum as long as 34 joint, 4-jointed. Antenna 2, 
penultimate joint of peduncle proximally wider than antepenultimate, consider- 
ably shorter than ultimate; flagellum rather longer than ultimate joint of 
pedunele, with 4 joints, 1° the longest. Maxilla 1, outer plate with 10 spines 
on apex, as compared with 9 in C. sismithi (p. 666). Peraeopod 1 as in 
C. tubularis with 4b joint broader than long; but peraeopod 2 with 4 joint 
much longer than broad, fully as long as 5!" and 6! combined. Peraeopod 3 
with the lobe-like 5!" joint less produced than in C. tubularis; probably to 
era 3 belong the broad marsupial plates, as in .C. crassicornis (p. 666). 
. 5—6 mm. 


Flinders Passage [North-Australia]. 


5. C. abditus R. Templ. 1836 C. a., R. Templeton in: Tr. ent. Soc. London, 
v.1p.188 1.20 f.5a—k | 1888 C. a., T. Stebbing in: Rep. Voy. Challenger, v.29 p.168 | 
1893 CO. a., A. Della Valle in: F, Fl. Neapel, v.20 p.379 | 1840 Cerapodina abdita, H 
Milne Edwards, Hist. nat. Crust., v.3 p. 62. 


A ml 17 at a 


Gerapus, Cheyreuxius 669 


Body elongate. Head large, laterally subtriangular, dorsally quadrate, 
most dilated anteriorly, a minute rostrum projecting forwards; front in lateral 
view almost vertical. Eyes a little prominent, small, round, black. Antenna 1 
tapering, about °/, as long as body; 3 joints of peduncle subequal or 1° 
rather the shortest, 1% in figure with sub-basal widening; flagellum 5-jointed. 
Antenna 2, ultimate and penultimate joints of peduncle longer and stouter 
than those in antenna 1; flagellum 5-jointed. Antennae 1 and 2, setae of 
peduncle in double rows, longer towards apices of joints, joints of flagella 
with spines. Gnathopod 1, 5t% joint scarcely as long as 6th, distally a 
little widened and (in figure) produced to a short tooth, 6" narrowly oblong, 
at the apex transversely truncate but very narrow; the much curved finger, 
though short, reaching much beyond it. Gnathopod 2, 5tk joint extremely 
large, subreetangular, hind margin produced to a strong tooth, a smaller 
one adjacent, filling up the space between it and base of the slightly curved 
6b joint, which is widest at base, has a coneave smooth hirid margin and 
its apex occupied by the strong, much eurved, but not very long finger. 
Peraeopods 1 and 5 in barmony with genus. L. about 3 mm. 

Tube, nearly 5 mm long, papyraceous, eylindrical, head of animal protrusible 
alternately from either end. 


At Mauritius or on the way thither from England. 


6. C. calamicola (Giles) 1885 Cyrtophium e., G.M.Giles in: J. Asiat. Soc. 
Bengal, 0.54 p.54 t.1 | 1888 Cerapus c., T. Stebbing in: Rep. Voy. Challenger, v.29 
p. 563 | 1893 C. c., A. Della Valle in: F. Fl. Neapel, v.20 p. 380. 


Body elongate, peraeon segments 4—6 the longest. Head subquadrate, 
rather long, rostrum small. Side-plates 5 and 6 (in figure) much the largest. 
Eyes (in figure) small, dark. Antenna 1 more than half as long as body; 
3 joints of peduncle subequal, 1° the stoutest, slightly widened near base; 
flagellum 3—6-jointed. Antenna 2 rather longer, ultimate joint of pedunele 
rather longer than penultimate; flagellum with 3—6 equal joints (in figure 1°* 
much the longest). Gnathopod 1, 6% joint long, ovate; finger as long as 
6° joint, inner margin very finely serrate. Gnathopod 2 very large, 5th joint 
triangular, hind margin produced to a strong incurved tooth, separated by 
a rather broad cavity from a smaller, blunter tooth, near base of the long, 
ovate 6" joint (in figure rather rectangular); finger as long as 6tk joint, 
eurved, acute, inner margin with a peculiar serrature of square, chisel-edged 
teeth. Peraeopod 3, 24 joint (in figure) much longer than broad; finger 
having hind margin provided with two curious short finger-like processes, 
Peraeopods 4 and 5, 24 joint broadly oval, much more expanded than in 
peraeopod 3; finger rounded and provided with a large tuft of hairs. Pleopod 3 
the smallest. Uropod 1, inner ramus 2-jointed (?1-jointed, tipped with a 
spine). Uropod 2, inner ramus rudimentary (waiting?). Colour golden 
brown with deep chocolate blotches. L. 3—5 mm. 

Tube 5—10 mm long, brown banded with light yellow and black. 


North-West of Bay of Bengal (Orissa coast). 


5. Gen. Chevreuxius Bonnier 


1896 Chevreuxius (Sp. un.: ©. grandimanus), J. Bonnier in: Ann, Univ. Lyon, 
2.26 p. 663. 


Oo unknown. — JS. Body elongate, depressed. Side-plates very small, 
not in contact. Eyes wanting. Antennae 1 and 2 with the pedunele long 


670 Ühevreuxius, Eriethonius 


and slender, longer than flagellum. Accessory flagellum of antenna 1 very 
short. Lower lip, inner lobes well developed. Mandible, 34 joint of palp 
the longest. Maxilla 1, inner plate small, with 1 seta. Gnathopod 1 com- 
plexly subchelate, the finger impinging against either the small 6!" or the 
very large 5th joint. Gnathopod 2 much smaller, subchelate. Uropods 2 
and 3 short, one-branched. Telson entire. 


1 species. 


1. C. grandimanus Bonnier 1896 C. g., J. Bonnier in: Ann. Univ. Lyon, v. 26 
p. 663 t. 40 f.3. 


Head large, rostrum and inter-antennal processes little prominent. Pleon 
segments 1—3, postero-lateral corners rounded. Antenna 1, 1° joint stoutest, 
little shorter than 24, with 3 spines on under margin; 3a joint rather long, 
though little more than half as long as 2; flagellum 8-jointed;; accessory flagellum 
with 2 joints, 24 minute. Antenna 2 a little longer, not stouter; ultimate 
joint of pedunele longer than the long penultimate; flagellum not long, 
with 4 joints, with 2 strong spines at end of 24, Upper lip distally rounded 
(slightly notched in figure). Maxilla 1, with 10 spines on apex of inner 
plate. Maxillipeds, outer plates much larger than inner; 4% joint of 
palp short. Gmnathopod 1, 24 joint channelled in front, 34 and 4eh very 
short, 5tR enormous, hind margin produced to a tooth, base of 6b not 
nearly occupying truncate distal margin of 5%, its hind margin forming a 
blunt tooth, which defines the excavate, very oblique palm, completely over- 
lapped by the finger. Gnathopod 2 very slender; the narrow 5tk joint longer 
than the equally narrow 6t", which form a little excavate palm, defined by 
a tooth and scarcely overlapped by the short finger. Peraeopods 1 and 2, 
4th joint rather long. Peraeopods 3—5, 24 joint narrowly oval. Peraeopod 3 
the shortest. Uropod 1, peduncle long and stout, longer than the rami, all 
armed with spines; inner ramus the shorter. Uropod 2, peduncle shorter 
but stout, the ramus short and narrow. Uropod 3 very short, peduncle 
stout, ramus narrow, ending in 2 setules. Telson broader than long, with 
upturned denticle at each angle of the truncate apex. L. nearly 4 mm. 


Bay of Biscay. Depth 950 m. 


6. Gen. Ericthonius M.-E. 


1830 RE (Sp. un.: E. difformis), H. Milne Edwards in: Ann. Sei. nat., 
v.20 p.382 | 1888 E., T. Stebbing i in: Rep. Voy. Challenger, v.29 p. 142, 285, 1672 | 1837 
Erichthonius, Barmeister, Handb. Naturg., p. 569 | 1893 E., A. Della Valle in: F. Fl. 
Neapel, v.20 p. 381 | 1894 E., G. O. Sars, Orust. Norway, v.1 p. 601 | 1840 Erichtonius, 
H. Lueas in: Hist. An. artie., Crust. Arach. Myr., p. 231 | 1852 Pyetilus, J. D. Dana in: 
P. Amer. Ac., «2 p.218 | 1853 P., J. D. Dana in: U. S. expl. Exp., v.13u p. 911, 973. 


. Side-plates small, with a tendency of 24 and 5th to exceed the others 
in size. Head rather elongate; lateral lobes produced. Pleon segments 1—3 
not wide or deep; postero-lateral corners rounded; segment 6 longer than 
segment 5. Eyes on lateral lobes. Antennae 1 and 2 slender, subequal, 
setose; pedunele long; flagellum of several joints. Antenna 1 without accessory 
flagellum. Antenna 2 attached much behind antenna 1; antepenultimate 
joint of pedunele long. Upper lip with rounded entire margin, and acute 
process on surface. Lower lip with inner lobes. Mandibular palp long, 
34 joint lamellar, densely setose. Maxilla 1, inner plate with a few setae, 
outer with 9 apical spines; 24 joint of palp long. Maxilla 2, inner plate 


Dr 


a Use die. ua ar 


Eriethonius 671 


with fringed inner margin. Maxillipeds, palp rather narrow. Gnathopod 1 
alike in d and Q, subchelate, 5tk joint not shorter than 6%. Gmathopod 2 
larger, in © complexly subchelate, 5! joint very large, produced into a 
tooth; in Q normal, 5tk joint much smaller than 6%, produced into a narrow 
lobe. Peraeopods 1 and 2, 24 joint expanded. Peraeopods 3—5, 24 joint 
not greatly expanded, the external expansion oblong, the inner oval; in 
peraeopod 3 the finger short, reverted, with dentiele on convex margin. 
Branchial vesicles small, absent from gnathopod 2. Marsupial plates broad. 
Pleopods 1—3 normal. Uropods 1 and 2 biramous. Uropod 3, ramus single, 
small, tipped with 2 upturned spinules. Telson short, broad, with the lateral 
lobes densely spinulose on surface. 


6 species accepted, 3 doubtful. 


Synopsis of accepted species: 
1 Gnathopod 2 in d, 5th joint bidentate — 2. 
Gnathopod 2 ind, 5th joint unidentate — 3. 
[ Peraeopod 3, 2d joint not produced downward .-l. E. brasiliensis . . p.671 


1) 


Peraeopod 3, 2d joint acutely produced downward 2. E.pugnax. .. .p.672 
Gnathopod 2 in d, palmar margin of 5th joint 
ee a N er 3. E. macrodactylus p.672 
8 Gnathopod 2 in d, palmar margin of 5th joint not 
deeply ineised — 4. 


ee Bee 4. E. difformis . . : p.672 

4 
Eyes large — 5. 
Gnathopod 2 ind, 6th joint with broadly lobed 

5 ee re ee A 5. E.hunteri. . . . p.673 
Gnathopod 2 ind, 6th joint with narrowly tubereled 


EEE RE RE 6. E. megalops . . . p.673° 


1. E. brasiliensis (Dana) 1853 & 55 Pyetilus b., J. D. Dana in: U. S. expl. 


. Exp., v.13u p.976; t.67 £.5a—h | 1853 Eriethonius bidens, A. Costa in: Rend. Soe. 
. Borbon., n.ser, v.2 p. 177 |1857 Erichthonius rapax, Stimpson in: Boston. J. nat. Hist., 


v.6 p.515 | 1872 Cerapus r., A. Boeck in: Forh. Selsk. Christian., 1871 p.40 t.1f.2| 
1857 Ericthonius difformis, Bate in: Ann. nat. Hist., ser.2 v.19 p.148 | 1893 Erich- 
thonius d. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.381 t.1 £.10; t.9 £.1—20| 
1862 Cerapus abditus (err., non Templeton 1836!), Bate & Westwood, Brit. sess. Crust., 
v.1 p.455 f. | 1876 C. a., A. Boeck, Skand. Arkt. Amphip., v.2 p.613 t.28 f.4 | 1894 
Erichthonius a., &. O. Sars, Crust. Norway, v.1 p.602 t.215 | 1898 E. a.?, Sowinski 
in: M&m. Soc. Kiew, v.15 p.458 | 1862 Cerapus a, + C. brasiliensis, Bate, Cat. Amphip. 
Brit. Mus., p. 263 t.45 f.2; p.267 t.45 f.8 | 1864 CO. latimanus, E. Grube in: Jahresber, 
Schles. Ges., v.41 p.63 | 1873 C. minax, (S. I. Smith in:) A. E. Verrill in: Rep. U. S. 
Fish Comm., v.1 p. 569. 


Body moderately slender, with broadly vaulted back. Head, lateral 
lobes broad with a small apical point. Side-plates contiguous, 24 and 5t" the 
largest, 24 with close-set short linear markings round part of margin. 
Eyes rather large, rounded, prominent, bright red. Antenna 1 more than 
half as long as body, 24 joint longer than 34, 34 than 1%, flagellum nearly 
as long as peduncle, about 12-jointed. Antenna 2 subequal to antenna 1, 
ultimate joint of pedunele a little longer than penultimate; flagellum about 
9-jointed. Gnathopod 1 ind‘, 5tk joint broad, rather longer than 6*b, 6 gently 
convex in front, behind quadrately rounded, with palm subequal to hind margin; 
finger matching palm. Gnathopod 2 in d, 24 joint widening from a narrow 
neck, 5! very large, the palmar -part produced into 2 teeth, the inner 
the smaller; 6% joint much narrower but not much shorter than basal part 


“os 


672 Eriethonius 


of 5th, hind margin slightly eoncave in the middle; finger very large, faleiform; 
but both 6*b joint and finger variable in size and shape. Gmathopod 2 in Q, 
5th joint produced along hind margin of 6% in a narrow lobe distally armed 
with setae and recurved spines, 6! joint large, palm rather oblique, longer 
than hind margin, finger matching. Peraeopods 1 and 2, 24 joint broadly 
oval, finger smooth. Peraeopods 3—5 successively longer; 24 joint successively 
narrower in proportion to length, oblong (Dana: nearly orbieular in peraeopod 3, 
narrow in peraeopod 5); in all finger with denticle on hinder convex margin. 
Pleopods 1—3 normal, with coupling spines and cleft spines. Uropods 1 
and- 2, pedunele longer than rami, margins more or less pectinate, spines 
small except the apical; in uropod 2 the rami laminar. Uropod 3, pedunele 
broad at base, much longer than the ramus, which ends in 2 upturned 
spines. Telson twice as broad as long, triangularly pointed between 2 rounded 
lobes, densely spinulose on the surface. Colour brownish or orange, with 
dots. L. 4—12 mm. 


Oceupies tubes affixed to hydroids and algae. 
Atlantie with adjoining seas (Europe from South- and West-Norway (depth 


19—75 m) to Adriatie and ?Bosphorus; Rio Janeiro; Vineyard Sound); North-Paeifie 
(San Franeiseo, depth 4 m). 


2. E. pugnax (Dana) 1852 Erichthonius p., Pyctilus p., J. D. Dana in: P. Amer. 
Ac., v.2 p.218 | 1853 &55 P.p., J.D. Dana in: U. S. expl. Exp., v,13u p. 975; t. 67 
f. 4a—d | 1862 Cerapus p., Bate, Cat. Amphip. Brit. Mus., p. 267 t.45 f.7 | 1898 Erich- 
thonius difformis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 381. 


Closely related to E. brasiliensis (p. 671), but the 6tk joint of gnatho- 
pod 2 in C sparingly erose within, hind margin (in figure) eomposed of 3 
smoothly rounded tubereles; peraeopod 3 is said to have the 24 joint of the 
same form as in E. macrodactylus, with a narrow acute prolongation of the 
hind margin. L.? 


Sooloo Sea. 


3. E. macrodactylus (Dana) 1852 Erichthonius m., Pyectilus m., J. D. Dana 
in: P. Amer. Ac., v.2 p. 218 | 1853 & 55 P. m., J. D. Dana in: U. S. expl. Exp., v. 1311 
p- 974; t. 67 f. 3a—c | 1862 Cerapus m, Bate, Cat. Amphip. Brit. Mus., p. 266 1.45 f.6| 
1893 Erichthonius difformis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 381. 


Distinguished‘ from E. difformis especially by the long tooth of the 
5th joint in gnathopod 2 being separated from the base of the 6!" joint 
by a very deep cavity, and by the 24 joint of peraeopod 3 having a narrow 
acute prolongation of the hind margin. Side-plate 5 smaller than either 
the 4th or 6th (in figure, but?). L.? 


S00loo Sea. 


4. E. difformis M.-E. 1830 E.d., H. Milne Edwards in: Ann. Sei. nat., v.20 
p- 382 | 1888 E.d., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 595 | 1859 Erich- 
tonius d., R. M. Bruzelius in: Svenska Ak. Handl., n. ser. v.ö nr. 1 p. 17 | 1879 Cerapus d,, 
Hoek in: Tijdschr. Nederl. dierk. Ver., v.4 p. 119 t.5 £.14,15; t.6 £.3; t.8 £.11,12]| 
1889 C. d., Hoek in: Tijdschr. Nederl. dierk. Ver., ser.2 v.2 p.229 t.10 £.15 | 1894 
Erichthonius d., G. O. Sars, Crust. Norway, v.1 p. 604 t.216 f.1 | 1842 Podocerus 
leachii, Kreyer in: Naturh. Tidsskr., v.4 p. 168 | 1853 Cerapus whitei, Gosse, Rambles 
Devonsh., p. 382 | 1857 Podocerus punctatus, Batein: Ann. nat. Hist., ser.2 v. 19 p. 148 | 
1862 Cerapus difformis + Dercotho& p., C.p., Bate & Westwood, Brit. sess. Crust., e.1 


ai Zn 


u un Dun nn LU L 2 Zn 


ME a ee er er BE at 
Fi Br ea BICHERT 


Eriethonius 673 


p- 457 £.; p. 461 f. | 1862. D. p., C.p. + C.d. + C.leachii, Bate, Cat. Amphip. Brit. Mus., 
p- 260 t.44 f.6; p.265 t.45 f.5; p. 268 | 1868 C. macrodactylus var. pontica, Czerniavski 
in: Syezda Russ. Est., Syezda 1 Zool. p. 97 & 1871 C. longimanus, A. Boeck in: 
Forh. Selsk. hrolien., 1870 p. 252. 


Possibly not distinet from E. brasiliensis (p. 671). Body more slender 
than in E. brasiliensis, especially in JS (Sars). Head, lateral lobes with the 
apical point sometimes well marked (not noted by Sars). Side-plates in S 
differing from those in ©, the 24 standing notably apart, and considerably 
larger than the others. Eyes rather small, rounded, dark red to black. Antennae 1 
and 2 elongate, 24 and 3 joints in antenna 1 subequal. The chief distinetion from 
E. brasiliensis rests with gnathopod 2 in S, which is of great length, the neck or 
proximal part of joint 2 elongated, 5% joint thrice as long as broad, slightly con- 
strieted at the middle, the tooth or thumb elongate, nearly straight, separated 
from the 6! joint by a narrow palmar cavity, the tooth sometimes having a 
subapical inner tooth; 6*% joint rather narrow, hind margin sinuous in the 
middle, with a projection at base; finger with setae on both margins and a 
group of very long ones near the tip. Colour greyish, mottled with brown 
spots. L. 4—12'5 mm. 


Tubes attached. 


North-Atlantie with adjoining seas (Europe from Trondjhemsfjord to the Black 
Sea; Azores; United States of America, depth 0—200 m). 


5. E. hunteri (Bate) ?1853 Cerapus rubricornis, Stimpson in: Smithson. Contr., 
v.6 nr.5 p.46 t.3 f.33 | ?1867 ©. r., C.rubiformis, Packard in: Mem. Boston Soe., v.1 
p. 297 | 1862 C. hunteri, Bate, Cat. Amphip. Brit. Mus., p. 264 t.45 f.3 | 1876 C. h., 
A. Boeck, Skand. Arkt. Amphip., v.2 p.618 t.28 £.5 | 1894 Eriethonius h., T. Stebbing 
in: Bijdr. Dierk., v.17 p. 45 | 1894 Erichthonius h., G. O. Sars, Crust. Norway, v. 1 
p- 605 t. 216 f. 2 | 1880 Ericthonius difformis (part.), S. I. Smith in: Tr. Connect. 
Ac., v.4 p.279 | 1893 Erichthonius d. (part.), A. Della Vallein: F. Fl. Neapel, v.20 p.382. 


Closely related to E. difformis, but differing as follows. Body 
in d much broader than high (Stimpson). Side-plate 5 larger than side- 
plate 2, with front lobe very large. Eyes rather large. Antennae 1 and 2 
perhaps more setose, and very hairy (Stimpson); each with flagellum of 
12 joints; 34 joint of antenna 1 usually shorter than 24, Gnathopod 1, 6th 
joint rather shorter than 5tk, variably expanded. Gnathopod 2 in J more 
robust; 5tk joint not constrieted, stout; the tooth not elongate (not always 
so short as represented by Sars); 6th joint broad, approximate to tooth of 
5th, its hind margin lamellar, divided in the middle by a small ineision, the 
two lobes thus formed, however, being rather variable in their relative pro- 
portions, ag not very large or rather large, without any notable setae. 
Peraeopods 1 and 2, 24 joint expanded, but less "broad in proportion to 
length than in E. brasiliensis (p. 671). Peraeopods 1—3, 24 joint oblong, 
successively narrower. Peraeopods 4 and 5, finger with denticle on hind 
margin scarcely perceptible.. Uropod 3 with a rather longer and more 
slender ramus. L. 5—15 mm. 

Arctic Ocean, North-Atlantie and North-Sea (Norway; North-East-England; 
North-America; lat. 73° N., long. 34° E.); Kattegat. 


6. E. megalops (0. Sars) 1879 Cerapus m., G. O. Sars in: Arch. Naturv. 
Kristian., v.4 p.461 | 1885 Erichthonius m., G. O. Sars in: Norske Nordhavs-Exp., v. 6 
Crust. I p.210 t.17 £.4a—b | 1893 E. difformis (part.), A. Della Valle in: F, Fl. Neapel, 
v.20 p. 383. 


Das Tierreich. 21.Lief.: T.R. R. Stebbing, Amphipoda I. 43 


674 Eriethonius, Cerapopsis 


Apparenily very near to E. hunteri (p. 673), but in gnathopod 2 in J 
the tooth of 5t Jain reaches nearly the extremity of the 6!" and the hind 
margin of the 6% joint is crenulate or furnished with several tubereuliform 
projeetions, as described by Stimpson in E. brasiliensis (p. 671). Telson small, 
tubular, armed at the apex with a number of small spines. Colour whitish, 
variegated with brown. L. about 7 mm. 


Aretie Ocean (North-West of Finmark, depth 1217 m; South of Jan Mayen, depth 
179 m). 


E. fasciatus (Stimps.) 1853 Cerapus f., Stimpson in: Smithson. Contr., ®.6 
or.5 p.49 t.3 f.85 | 1893 Erichthonius difformis (part.)?, A. Della Valle in: F. Fl. 
Neapel, v.20 p. 387. 


L. nearly 8 mm. 
Hake Bay [Grand Manan]. Depth 66m, on a gravelly bottom. 


E. peculans (Dana) 1852 Amphitoe p., J. D. Dana in: P. Amer. Ac, v2 
p- 213 | 1853 & 1855 Dercothoe speculans, J. D. Dana in: U. S. expl. Exp.. v. 1311 p. 971; 
t. 67 f.1a—h | 1862 D. s., Cerapus s., Bate, Cat. Amphip. Brit. Mus., p.260 t.44 £.8 | 
1893 Erichthonius difformis (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 381. 

Perhaps the 2 of E. pugnax or E. macrodactylus (p. 672.) 

Sooloo Sea. Depth 12 m. 


E. sp., Dana 1853 & 55 Dercothoe emissitius (part.)? (err., non Gammarus e. 
J. D. Dana 1852), J. D. Dana in: U.S. expl. Exp., e. 1311 p. 970; t.66 £. 10a—e. 


Sooloo Sea. 


7. Gen. Cerapopsis Della Valle 
1893 Cerapopsis (Sp. un.: C. longipes), A. DellaVallein: F.Fl. Neapel, v.20 p.356, 388. 


Side-plates 2—5 large. Antenna 1 without accessory flagellum. Antennael 
and 2 with flagellum few-jointed. Mouth-parts as in Eriethonius (p. 670), 
except as follows. Mandibular palp has the 34 joint rather long, apically rounded. 
Maxilla 1 has the inner plate longer, tipped with 1 large and 1 small seta, 
and outer plates of maxillipeds are more prolonged. Gnathopod 1 with palm 
undefined. Gnathopod 2 becoming chelate in C, remaining subehelate, with palm 
undefined, in ©. Gmathopods 1 and 2 much larger in S than in ©. 
Peraeopods 1 and 2, 24 joimt narrow. Peraeopods 3 and 4, 24 joint broad, 
finger reverted. Peraeopod 5, 24 joint not very broad. Uropods 1 and 2 
biramous. Uropod 3, pedunele not expanded, ramus single. Telson entire. 

l species. 


r 1. C.longipes Della Valle 1893 ©. 1, A. Della Valle in: F. Fl. Neapel, v.20 
P.388 t.3 £.10; 1.9 £.20--40; t.56 £.1. 


Body eompressed, rather robust. Side-plate 1, lower front, angle more 
produced in 9 than in ©, 24 covering 24 joint of limb in 9 but not ind, 
34 trapezoidal, 4 rectangular, 5t® with front lobe as deep as 4b, Antenna 1, 
1° joint stout, °/, as long as 24, 34 as long as 1°; flagellum less than 
half as long as pedunele, with 3 rather long joints. Antenna 2 a little longer 
than antenna 1, antepenultimate joint of pedunele rather long, penultimate shorter 


than ultimate, flagellum little longer than ultimate, 3-jointed. Gnathopod 1. 


in Cd, 24 joint slender, 4!" short, 5tk more than 4 times as long as broad, 
6% also narrow and a little shorter; finger slender, a little shorter than the 
6'h joint. ‘Gnathopod 2 in adult d much stouter and rather longer; 24 joint 


Br 
Ei 4 


Mr 


INA 


E 
a 
7 
E 
3 

3 

- 


ER 


ar 


dr Ser * DETRE Rd ZEE u, op” 


Cerapopsis, Neohela 675 


comparatively short, robust, 3—5'% short, 6% enormously developed, hind 
margin produced to a bifurcate process, the very large curved finger forming 
a very elongate cone or an actual cylinder, and combining with the variable 
process of the 6tl joint to form a true didactyle chela. Gnathopod 1 in oO, 
5th joint as broad as 6%, and a little longer, 6 almond-shaped, finger 
large but shorter than 6! joint, which in young J' it outstrips in length. 
Gnathopod 2 in O a little larger than gnathopod 1; 39 and 4tk joints short, 
5th also short, broader than long, 6t% almond-shaped, finger robust but short. 
Peraeopods 1 and 2 slender, finger small and slight. Peraeopod 3, 24 joint 
almost eircular, its margins entire; the other joints short, compact, 6tk with 
apical seta, finger short, stout. Peraeopod 4 rather longer; 24 joint less 
broad, 6! with apical spine simulating a second finger. Peraeopod 5 rather 
longer, 24 joint scarcely half as long as broad, finger arched. Pleopods 1—3, 
peduncle rather stout, inner ramus narrower but rather longer than outer, 
inner margin of 1° joint smooth; outer ramus proximally very hroad, 
Uropods 1 and 2 not very spinose. Uropod 3, peduncle longer than ramus, 
which is slightly ineurved and tapering, with apieal spine. Telson triangular, 
with 2 setules on each side of upper surface, apex rounded. Colour in d, 
head and segments yellow in front, brown behind, side-plates 1—4 each 
with a brown blotch; in © back light brown, yellow blotches on sides; 
eggs (large, very few) reddish yellow. L. 3 mm. 


Bay of Naples.. In fine sand, depth 10—20 m. 


8. Gen. Neohela S. I. Sm. 

1861 Hela (Sp. un.: H. monstrosa) (non Münster 1840, Decapodal), A. Boeck in: 
Forh. Skand. Naturf., Mode 8 p.668 | 1876 H., A. Boeck, Skand. Arkt. Amphip., v.2 
p.643 | 1886 H., Gerstaecker in: Bronn’s Kl. Ordn., v.5ır p.495 | 1881 Neohela, 8. 
I. Smith in: P. U. S..Mus., v.3 p.448 | 1888 N., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.322, 325, 1215 | 1895 N., A. Della Valle in: F. Fl. Neapel, v.20 p.342 | 1894 
N., G. ©. Sars, Crust. Norway, v.1 p.623 | 1882 Helella, G. ©. Sars in: Forh. Selsk. 
Christian., nr. 18 p.3l. 


Body very slender, tapering backward; pleon slight, subeylindric, 
abruptly narrower than peraeon. Head quadrate. Side-plates small and shallow, 
not contiguous. Antennae 1 and 2 very long and slender, 1% with well 
developed accessory flagellum. Upper lip bilobed. Maxilla 2 not fringed on 
side of inner plate, otherwise mouth-parts in general as in Unciola (p. 676). 
Gnathopods 1 and 2 subchelate; 24 joint narrow, 5" not short, finger elongate. 
Peraeopods 1—5 long and slender, 24 joint linear. Pleopods 1—3 very 
slender and feeble. Uropods 1 and 2 biramous, slender, the rami spinose; 
uropod 1 much the longer. Uropod 3 small, peduncle very small, the 
single ramus much longer. Telson imperfectly defined from pleon segment 6, 
smooth, distally tapering. 

2 species, 

Synopsis of species: 


Eyes imperfeetly developed, represented by whitish pigment 1. N. monstrosa . p.675 
Eyes prominent, salmon-eoloured . . ..:.. 2... 2. N. phasma . . p.676 


1. N. monstrosa (Boeck) 1861 Hela m., A. Boeck in: Forh. Skand. Naturf., 
Mode 8 p.668 | 1876 H. m., A. Boeck, Skand. Arkt. Amphip., v.2 p. 643 t.32 f.1| 1881 
Neohela m., 8.1. Smith in: P. U. S. Mus., v.3 p.448 | 1887 N. m., H. J. Hansen in: 
Vid. Meddel, ser.4 v.9 p.168 | 1893 N. m. (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p.843 t.55 £.19—24 | 1894 N. m., G. O. Sars, Orust. Norway, v.1 p.624 t. 224 | 
1882 Helella m., G. O. Sars in: Forh. Selsk. Christian., nr. 18 p. 31. 


43* 


nn DRS Ede SE 


676 Neohela, Uneiola 


Peraeon segments 1—4 laterally rather expanded and angularly produced 
in front. Head, rostrum obsolete; front corners acute, little produced, sides 
projecting outward in a sharp tooth. Side-plates 1—3 acute in front. 
Pleon segment 3 without postero-lateral angles. Eyes represented on each 
side by a small patch of opaque whitish pigment. Antenna 1 longer than 
body; 24 joint 2—3 times as long as 1%, 34 rather longer than 1%; flagellum 
longer than peduncle, many-jointed, accessory flagellum not as long as 34 joint 
of pedunele, 6—10-jointed. Antenna 2 longer; ultimate and penultimate joints of 
peduncle very long, spinulose all round like peduncle of antenna 1; flagellum 
longer than pedunele, many-jointed. Gnathopod 1, 5tk joint densely setose, about 
as long as 24 or 6th, 6th also densely setose, widening gradually to the transverse 


palm, which has 2 sharp teeth in the middle, and is defined by a 34, the prolong- 


ation of the hind margin; finger projecting much beyond palm, its outer margin 
densely setose. Gnathopod 1 in Q like that of JS, but less strong. Gmnatho- 
pod 2 ‚smaller; 5t% joint shorter than 24, much narrower than. 6%, which 
widens to the oblique straight palm, defined by an obtuse angle; finger 
slender, setose on outer margin, reaching much beyond palmar spines. 
Peraeopods 1 and 2, 5tk and 6*& joints subequal; finger slight. Peraeopod 3, 
5th joint much shorter than 6%, finger slight. Peraeopods 4 and 5 much 
longer than preceding; 5% joint short, finger faleiform, strong. Uropod 1, 
outer ramus in O, not in Q, widened. Uropod 3, ramus nearly thrice as 
long as pedunele. Telson triangular, with obtuse apex. Colour yellowish, 
semi-pellueid. L. © 25, d 28—30 mm. 


Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (West- and North-Norway, 
depth 188—514 m; Spitzbergen; Farö Isles, down to 2288 m; Baffın Bay); Kattegat. 


2. N. phasma S.I. Sm. 1881 N.p., S. I. Smith in: P. U. S. Mus., v.3 p.448| 
1894 N. p., G. O. Sars, Crust. Norway, v. 1 p. 624, 625 | 1693 N. monstrosa (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 343. 


d. Head, rostrum ‚slightly prominent, obtusely angular. Eyes large 
and prominently convex, salmon-coloured (in spirit). Antenna 1, 2% joint 
more than thrice as long as 1%, 34 considerably longer than 181; accessory 
flagellum as long as 34 joint of peduncle, 9-jointed. L. 26 mm. 


North-Atlantie (South of New England). Depth 680 m. 


9. Gen. Unciola Say 


1818 Umneiola (Sp. un.: U. irrorata), Say in: J. Ac. Philad., v. 11I p. 388 | 1888 
U., T. Stebbing in: Rep. Voy. Challenger, v. 29 p.1168 | 1893 U., A. Della Valle in: 
F. Fl. Neapel, v.20 p. 336 | 1894 U., G. O. Sars, Crust. Norway, v. 1 p. 619 | 1845 
Glauconome (Sp. un.: @. leucopis) (non Goldfuss 1826, Bryozoa!), Kreyer in: Naturh. 
Tidsskr., ser.2 v.1 p. 491, 501 | 1876 @., A. Boeck, Skand. Arkt. Amphip., v.2 p. 636 | 
1862 Dryope, Driope (non .Dryope Robinean- Desvoidy 1830, Diptera!), Bate, Cat. 
Amphip. Brit. Mus., p. 276; t. 47. 


Body slender, rather depressed; peraeon long, alt segment 6 very 
short. Head square, with somewhat projeeting front corners. Side-plates 
all shallow. Pleon segment 3, postero-lateral corners acute, usually with 
sinus above. Eyes, when present, small, on front corners of head. Antenna 1 
the longer, with -small accessory flagellum. Antenna 2 the stouter, and 
stouter in J than in ©. Upper lip unsymmetrically bilobed. Lower lip 
normal. Mandible normal, 34 joint of palp narrow, shorter than 24, Maxilla 1, 


inner plate small, with few setae, outer with 9 apical spines; 24 joint of 


Fi: 


ee | ln Din 


Unciola 677 


palp long. Maxilla 2, inner plate with lateral fringe. Maxillipeds normal; 
outer plates broad, with rather strong spine-teeth. Gnathopod 1 much the 
stronger, differing to some extent in the 2 sexes, subchelate; the finger 
setose on outer margin. Gmnathopod 2 feebly or sometimes scarcely sub- 
chelate. Peraeopods 1—5 rather slender; 2° joint little expanded, finger 
with setules on inner margin. Pleopods with strongly serrate coupling spines 
on short, rather stout pedunele. Uropods 1 and 2 biramous, stout, with 
strong spines. Uropod 3 very short, with small outer ramus; the inner never 
articulated, but sometimes marked off from peduncle, at other times represented 
only by backward prolongation of peduncle. Telson lamellar, rounded. 


8 species. 
Synopsis of species: 


‘ Gnathopod 1 ind, 6th joint much longer than 


1 Ne RR RL FIR 1. U, isticornis . .. . - 9.674 
Gnathopod 1 ind, 6th joint not much longer 
than broad — 2. 
Antenna. 1, accessory flagellum with 4 or 
5 joints — 8. 
Antenna 1, accessory flagellum with fewer than 
4 joints — 5. 
Antenna 1, 8d joint not less than half as long 
3 TE a a ER N 2. D.leucopis . . ; . - p- 678 
Antenna 1, 34 joint less than half as ale 
as 24 — 4, 
ig le 8. DU. irrorata . . .».» p- 678 
Eyes indistinet or wanting. . 2»... 4. U. crassipes . . - . p.679 
Gnathopod 2, 5th joint much longer than 6th 5. U.planipes. ... - p- 679 
| Gnathopod 2, 5th joint not much longer than 
6th — 6. 
6 Beam. Zaun een 6. U. erenatipalma . . p.680 
Eyes wanting — 7. 
- | Uropod 3, inner process of pedunele acute 7. U. petalocera.. . . . p.681 
Uropod 3, inner process of peduncle obtuse . 8. U.incerta . ... - p- 681 


1. U. laticornis H. J. Hansen 1887 D.T!., H. J. Hansen in: Vid. Meddel., ser. 4 
v.9 p.166 1.6 1. 7—7b | 1889 D. I., J. Bonnier in: Bull. sei. France Belgique, v. 20 
p- 388, 396 | 1894 U. 1.. G. O. Sars, Crust. Norway, v.1 p. 619 | 1893 U. irrorata (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 338. 


oO unknown. — G. Head, rostrum rather short, lateral corners some- 
what produced, truncate. Pleon segment 3, postero-lateral angles acute, with 
sinus above. Eyes distinet, pale. Antenna 2, antepenultimate joint of peduncle 
much dilated, rather longer than broad, infero- -distally broadly rounded, not 
much produced; penultimate joint much dilated, scarcely twice as long as 
broad, proximally thick, distally much compressed. Gmnathopod 1, 24 joint 
short, not twice as long as broad, 6" much longer than 24, not remarkably 
broad at base, the basal process rather small, as broad as long, subacute, 
unarmed, a nearly straight margin between this and the finger-hinge being 
interrupted by a small tooth; finger reaching the basal process. Gnathopod 2, 
5th joint scarcely longer than 6%, which is rectangular, not twice as long 
as broad; palm nearly transverse. Peraeopods long "and slender. Uropod 1, 
peduncle about 1'/, times as long as outer ramus; outer ramus rather longer than 


678 Unsiola. 


inner, each armed with a few stout spines. Uropod 3, pedunele forming a 
rather broad, oblique plate; its hinder angle reaching beyond apex of telson, 
armed with a large spine and some setae; inner ramus in no way marked 
off from pedunele, outer attached at middle of outer side of peduncle, rather 
large, armed with a minute spine and some long setae. Telson as broad 
as long; apical margin much more curved than basal. L. 57 mm. 


Davis Strait (lat. 69° N., long. 58° W.). Depth 339 m. 


2. U. leucopis (Kroyer) 1845 Glauconome 1., Kroyer in: Naturh. Tidsskr., 
ser.2 v.1 p.491 1.7 f.2a—e | 1846 @. 1., Kroyer in: Voy. Nord., Crust. t.19 f. la—u | 
1894 Uneiola l., G. O. Sars, Crust. Norway, v.1 p.620 t.222 | 1896 U. 1., J. Bonnier 
in: Ann. Univ. Lyon, 0.26 p. 666 | 1862. U. l., U. leucopes, Bate, Cat. Amphip. Brit. Mus., 
p- 279 1.47 f.3 | 1880 U. irrorata. (part.), S. I. Smith in: Tr. Conneet. Aec., v.4 p. 280 | 
1882 U. i., G. O. Sars in: Forh. Selsk. Christian., nr. 18 p. 114 | 1887 U.i., H. J. Hansen 
in: Dijmphna Udb., p. 232 | 1887 U. i., H. J. Hansen in: Vid. Meddel., ser. 4 «.9 p. 164 
t.6 £.5, 5a | 1889 D.:. (part.), J. Bonnier in: Bull. sei. France Belgique, v.20 p. 393 | 
1893 D.i. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 338. 


Body rather strongly eonstrueted, peraeon segments transversely furrowed, 

pleon segments 1—3 each with rounded prominence on each side. Head, 
rostrum acute, rather long; front corners obtuse, rather prominent. Side- 
plates 1—4 subacute in front, 5% deeper than the rest. Pleon segment 3, 
postero-lateral corners acute with sinus above. Eyes represented by a small 
patch of opaque whitish pigment on each side. Antenna 1 nearly °/, as 
long as body; 24 joint rather longer than 1°, not twice as long as 34; 
flagellum rather shorter than pedunele, about 16-jointed; accessory flagellum 
5-jointed. Antenna 2, antepenultimate joint of peduncle nearly as in U. peta- 
locera (p. 681), but penultimate joint not so widely expanded at base; ulti- 
mate joint nearly as long as penultimate; flagellum nearly half as long as 
pedunele, about 10-jointed. Gnathopod 1 nearly as in U. irrorata, except 
that in C' the palm is angularly prominent between 2 cavities. Gnathopod 2 
rather feeble, densely setose; 6!" joint about as long as 5tk, narrowly oblong; 
palm very short, transverse. Peraeopods 3—5, 24 joint slightly expanded, 
densely setose. Uropods 1 and 2 rather stout; rami in each subequal, with 
strong apical spine. Uropod-3 very small; process of pedunele broad, narrowing 
gradually to apex tipped with 4 setae; inner ramus not marked off, outer 
very small, not nearly reaching end of process of peduncle, tipped with 
4 setae. Telson roünd,. with setule on each side. Colour yellowish grey. 
L. 13 mm. 


Arctic Ocean (widely distributed, depth to 300 m; Varangerfjord [Norway], 
depth 170-226 m). 


3. U. irrorata Say 1818 U. i., Say in: J. Ac. Philad., v. lu p.889 | 1840 D.i, 


H. Milne Edwards, Hist. nat. Crust., 3 p.69 | 1853 UT. i., Stimpson in: Smithson. 
Contr., ©.6 nr.5 p.45 | 1862 D.i., Bate, Cat. Amphip. Brit. Mus., p. 279 | 1873 D.i., 
(S.1 Smith in:) A. E. Verrill in: Rep. U. S. Fish Comm., v.1 p. 840, 567 t.4 f.19 | 1880 
U. i., S.I. Smith in: Tr. Conneet. Ac., ®. 4 p. 280 | ?1888 D.i., T. Stebbing in: Rep. 
Voy. Challenger, v.29 p.1169 t. 138e | 1889 U.i. (part.), J. Bonnier in: Bull. sei. France 
Belgique, v.20 p.393 | 1898 U. i. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 838 
t.55 £.37—4l. 


Body dorsally broad, flattened. Head, rostrum distinet, acute, lateral 
corners blunt, moderately prominent. Side-plates very shallow, 1° — 4 with 
front corner acute. Pleon segment 3, postero-lateral corners acute, with 


nd lm U u 


Unciola 679 


- sinus above. Eyes small, rounded. Antenna 1 elongate, 24 joint longer 


than 1°, nearly thrice as long as 34; flagellum nearly as long as peduncle, 
in © attaining 23 joints; accessory flagellum with 5 joints, the last minute. 
Antenna 2 in S and 9 not distinguishable from those in U. petalocera 


(p. 681); flagellum in JS attaining 16 joints. Gnathopod 1, 24 joint very 


broad except at the base, 5!" joint short, broad, produced to a prominent 


tooth with irregular apex, 6!" very broad, especially in S, with basal process 


projecting beyond process of 5% joint, its blunt apex carrying a stout spine; 
the long oblique palm minutely erenulate throughout, with a very slight 
cavity at each end; finger reaching basal process of 6!" joint, teeth of inner 
margin not very conspicuous, setae of outer numerous and strong. Gnatho- 
pod 2, 5tk joint deeidedly longer than 64, both very setose, 6th narrowly 
oval or almost tapering, palm almost obsolete; finger very small. Peraeo- 
pods 1—5 slender; 24 joint very little expanded, rather more so in peraeo- 
pods 1 and 2 than in 3—5, setose in the latter. Uropods 1 and 2 not 
elongate, spines few but stout, especially the apical ones; rami nearly equal 
to one another, more than half as long as pedunele. Uropod 3, inner 
process of peduncle not very broad, with an oblique line distinetly defining 
it as representing the inner ramus, tipped with 2 or 3 setae; outer ramus 
longer than inner and produced beyond it, fringed with 7 setae. Telson 
rounded. Colour red or brown, mottled with white; antennae 1 and 2 annulated 
and gnathopod 1 marked with bright red (Smith). L. reaching 15 mm. 


North-Atlantie (North America from Labrador to New Jersey). Depth 0—800 m. 


4. U. crassipes H. J. Hansen 1887 U. c., H. J. Hansen in: Vid. Meddel., ser. 4 
v.9 p. 165 t.6 f.6,6a | 1896 U. c., J. Bonnier in: Ann. Univ. Lyon, v.26 p. 667 | 1893 
U. irrorata (part.). A. Della Valle in: F. Fl. Neapel, «.20 p. 338. 


O unknown. — G. Head, rostrum rather long; front corners truncate, 
rather prominent. Side-plate 1 acute in front. Pleon segment 3, postero- 
lateral corners with a rather small acute but not produced point, without 
conspicuous sinus between it and the bulging hind margin. Eyes perhaps 
wanting. Antenna 1, 24 joint thrice as long as 34; accessory flagellum (in 
figure) 4- or 5-jointed. Antenna 2, antepenultimate and penultimate joints 
of peduncle scarcely so stout as in U. leucopis, somewhat compressed. Gnatho- 
pods 1 and 2 seemingly as in U. leucopis. Uropod 1, peduncle about 
*/,, longer than the rami, which have stout spines. Uropod 3, inner process 
of pedunele, though not separated from the base by an articulating membrane, 
indicating a small inner ramus, tipped with 2 spinules; outer ramus broader 
and much longer than inner and reaching beyond it, with a spinule and 
some setae. Telson shortly oval. L. nearly 9 mm. 


Baffın Bay (lat. 71° N., long. 59° W.). Depth 376 m. 


5. U. planipes Norm. 1867 U, p., A. M. Norman in: Nat. Hist. Tr. Northumb,., 
v1 p.14 t.7 £.9—13 | 1893 U.p., A. Della Valle in: F. Fl. Neapel, v.20 p. 341 t.55 
f.42—45 | 1894 U.p., G.O. Sars, Crust. Norway. v.1. p. 621 t.223 | 1868 D. leucopes 
(err., non Glauconome leucopis Kroyer 1845!), Bate & Westwood, Brit. sess. Crust., v.2 
p- 518 | 1871 Glauconome kröyeri + @. steenstrupi, A. Boeck in: Forh. Selsk. Christian., 
1870 p. 259, 260 | 1876 @. k.+G. s., A. Boeck, Skand. Arkt. Amphip., v.2 p. 639 t.30 
f.1; p: 640. f 


Body slender, dorsally smooth; peraeon segment 2 in S with long 


'ventral spine. Head, rostrum distinet, rather flattened. lateral corners angular, 


little prominent. Side-plate 1 produced acutely forward, 24 deeper than 


680 Uneiola 


the rest, subacute in front in S, not in Q. Pleon segment 3, postero-lateral 

corners acute, with sinus above. Eyes represented only by an irregular patch 
of whitish pigment on each side. Antenna 1 long and slender, 24 joint 
longer than 1°, nearly thrice as long as 34, flagellum subequal to peduncle, 
14-jointed, accessory flagellum with 2 joints, 24 minute. Antenna 2 in d, 
antepenultimate joint of pedunele thick, lower distal end round, slightly 
produced, penultimate also thick, ultimate not very slender; in Q these joints 
are much more slender; flagellum as long as ultimate joint of pedunele 
in Q, shorter in C, 6-jointed. Gnathopod 1 in 9, 5! joint as broad as 
long, 6! moderately stout, hind margin not extremely short; palm defined 
by an obtuse angle against which the apex of elosed finger impinges, leaving 
2 palmar cavities. Gmnathopod 1 in Q, 24, 5tk and 6'k joints less broad 
than in JS, with the palm oblique but nearly straight. Gnathopod 2 slender, 
stouter in d than in Q; 5th joint large, much longer than 6th, densely 
setose on hind margin, 6% tapering distally, without palm; finger very small. 
Peraeopods 1—5 very slender. Peraeopods 3—5, 2° joint narrow, not setose. 
Branchial vesicles very small. Uropods 1 and 2 not very robust, spinose. 
Uropod 3, laminar inner process of peduncle rather narrow, armed with a 
single spine; inner ramus not indicated, outer produced beyond process of 
peduncle, sublinear, with 5 long apical setae and 1 seta on outer margin. 
Telson subrotund, with 2 spinules on each side. Colour pale yellow, banded 
with light orange; whitish patches along the sides. L. 9:5, S 6 mm. 


Arctic Ocean, North-Atlantie, North-Sea and Skagerrak (Norway from Christiania- 
fjord to Vadsö, depth 94-564 m; Greenland, depth 90 m; British Isles); Kattegat. 


6. U. erenatipalma (Bate) 1855 U. irrorata (err., non Say 1818!), Gosse in: 
Ann. nat. Hist., ser.2 v. 16 p.307 | 1862 Dryope i., Driope i. + Dryope crenatipalma, 
Driope c., Bate, Cat. Amphip. Brit. Mus., p. 276 t. 47 £.1; p. 277 t.47 f.2 , 1863 
Dryope i.+ D. crenatipalmata, Bate & Westwood, Brit. sess. Crust., v.1 p. 488 £.; p. 490 f. | 
1874 D. crenatipalma, T. Stebbing in: Rep. Devonsh. Ass., v.6 p.770 | 1889 Umnciola 
crenatipalmata, J. Bonnier in: Bull. sei. France Belgique, v.20 p.392 t.12, 13 | 1893 
U. c., Chevreux & E. L. Bouvierin: Ann. Sei. nat., ser.7 v.15 p.138 t.2 f£.12 | 1898 
U. c., A. Della Valle in: F. Fl. Neapel, v.20 p. 340 t. 55 f. 32—36 | 1896 U. c., J 
Bonnier in: Ann. Univ. Lyon, v.26 p. 666. 


Body rather broad, depressed. Head, rostrum short, acute; lateral corners 


with inner point acute. Side-plates 1 and 2 with front corner acute. Pleon _ 


segment 3, postero-lateral corners acute, with sinus above. Eyes small, rounded, 
remaining dark in spirit. Antenna 1, 24 joint rather longer than 1°, less 
or not more than twice as long as 34; flagellum shorter than peduncle, 
11-jointed; accessory flagellum with 2 joints, 24 minute. Antenna 2, ante- 
penultimate .and penultimate joints of peduncle in J stout but not laminar, 
ultimate nearly as long as penultimate, flagellum as long as ultimate, 9-jointed. 
Gnathopod 1, 24 joint broad except at base, 5t® short, broad, produced into 
a blunt setose process, 6!" broad, produced into a blunt basal process reaching 
beyond process of 5% joint; the long oblique palm in JS forming 3 cavities, 
in Q convex between 2 very shallow cavities, in both sexes minutely erenulate; 
finger meeting basal process, its inner margin dentieulate, outer with several 
setae. Gmathopod 2 rather feeble; 5th joint rather shorter than 6t%, which 
is rectangular, having in S an almost transverse, slightly convex palm, 
over which the small finger eloses tightly, while in Q the palm is deeply 
excavate, the closed finger leaving a conspieuous gap. Peraeopods 1—5 
nearly as in U. irrorata (P- 678). Uropods 1 and 2, rami somewhat unequal. 
Uropod 3 very small, inner process of pedunele tipped with a spine and 


Er“ 


Uneiola, Siphonoecetes 681 


seta and indicated as the inner ramus by a constriction on each side, but 

without line of demareation; outer ramus tipped with setae, broader than 

long, reaching apex of inner; or (Chevreux & Bouvier) about as broad as 

long, reaching apex of the inner. Telson röund. L. about 8 mm. 
North-Atlantie with adjoiping seas (England, France, Spain). 


- 7, U. petalocera (0. Sars) 1876 Glauconome planipes? (err., non Uneiola p., 
A.M. Norman 1867!), G. O. Sars in: Arch. Naturv. Kristian., v.2 p. 360 | 1879 @. peta- 
locera, G. O. Sars in: Arch. Naturv. Kristian., v.4 p.462 | 1885 Unciola p., G. O. Sars 
in: Norske Nordhavs-Exp., v.6 Orust. I p. 212 t.17 f.5a—l | 1889 U. p., J. Bonnier in: 
Bull. sei. France Belgique, v.20 p. 396 | 1894 U. p., G. O. Sars, Crust. Norway, v. 1 p.619 | 
1893 U. irrorata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 338. 


Body slender and in general much resembling U. planipes (p.679). Head 
truncate in front, without distinet rostrum, lateral corners acute. Side-plates 
1-4, front corner acute, and in side-plate 1 prolonged. Pleon segment 3, 
postero-lateral corners acute, rather strongly produced. Eyes not visible. An- 
tenna 1 slender, elongate, 24 joint longer than 1°, and fully thrice as long as 34, 
flagellum about as long as pedunele, 20-jointed, accessory flagellum 2-jointed. 
Antenna 2 in J, antepenultimate joint of peduncle greatly expanded (in oO 
not), lower distal end rounded and rather strongly produced, penultimate 
strongly expanded, lamellate, narrowing distally; flagellum a little longer 
than ultimate joint of pedunele, with 9 joints (or in figure of S about 16).- 
Gnathopod 1 in C, 6% joint very broad and strongly compressed, with 2 
deep cavities in the palm, which is defined by an obtuse angle; finger 
remarkably long, faleiform, its apex nearly reaching the 4" joint. Gnatho- 
pod 1 in ©, 6** joint piriform; palm faintly ineurved, very oblique, indistinetly 
defined from the short hind margin; finger elosing between 2 sets of palmar 
spines. Gnathopod 2 rather feeble, setose, 5tk joint a little shorter than 
6, which is subrectangular, palm nearly transverse; finger small. Peraeo- 
pods 1—5 slender, 1t:—34 subequal, 4" and 5tk considerably longer. Peraeo- 
pods 3—5, 24 joint linear, not setose. Uropods 1 and 2 nearly as in U. planipes. 
Uropod 3, pedunele produced within to a pointed lobe, carrying a single 
spine; inner ramus not indicated, outer narrowly oval, produced beyond 
inner process of peduncle, fringed with setules. Telson semi-elliptical, with 2 
short apical bristles. Colour whitish. L. 10 mm. 

North-Atlantie (lat. 68—75° N.). Depth 658—1237 m. 


8. U.incerta Bonnier 1896 U. i., J. Bonnier in: Ann. Univ. Lyon, v.26 p. 666 
t.40 £.4. 


Oo. Resembling in general U. erenatipalma. Eyes wanting. Antennal, 
15 joint of peduncle armed below with double row of spinules, 24 not quite 
twice as long as 34; accessory flagellum with 3 joints, 1° and 2d equal, 
34 nodiform. Uropod 3, peduncle broadly produced ön inner side, armed at 
apex with a spine and 2 setae; inner ramus not indicated, outer small, not 
reaching end of process of peduncle, apex truncate, armed with 2 spines 
and 8 setae. L. about 5 mm. — J unknown. 


Bay of Biscay. Depth 180 m. 


10. Gen. Siphonoecetes Kıayer 


1845 Siphonoecetes (Sp. un.: $, typieus), Kroyer in: Naturh. Tidsskr.. ser. 2 v.1 
p 481, 491 | 1876 S., A. Boeck, Skand. Arkt. Amphip., v.2 p.630 | 1888 S., T. Stebbing 
in: Rep. Voy. Challenger, v.29 p.212 | 1893 S., A. Della Valle in: F. Fl. Neapel, v.20 
p- 357 | 1894 $., G. O. Sars, Crust. Norway, v.1 p.609 | 1857 Siphonocetus, Bate in: 


682 Siphonoecetes 


Ann. nat. Hist., ser.2 v.19 p.149 | 1862 Siphonoecetes (Siphonaecetus), Bate & Westwood, 
Brit. sess. Crust., v.1 p. 463, 467 | 1862 Siphonoecetus (part.), Bate, Cat. Amphip. Brit. 
Mus., p.268 | 1871 $., A. Boeek in: Forh. Selsk. Christian., 1870 p.257 | 1873 Siphono- 
coetus, A. Marschall, Nomenel. zool:, p. 420 | 1887 Siphonaecetes, Chevreux in: Bull. 
Soe. zool. France, v.12 p. 290, 317. 


Body slender, peraeon much longer than pleon. Head subquadrate. 
Side-plates very shallow, setulose, 1° subacute in front, 5tk, 6tk much 
produced backward. Eyes, when present, placed on front corners of head. 
Antennae 1 and 2 setose. Antenna 1, pedunele much longer than flagellum, 
its 3 joints subequal, without aecessory flagellum. Antenna 2 much longer, 
stouter; flagellum short, of 1 long and 2 short joints, with unguiform 
spines at apex. Upper lip rounded or faintly bilobed. Lower lip with the 
mandibular processes narrow. Mandible with palp of 1 setose joint, molar 
with accessory plate, otherwise normal. Maxilla 1, inner plate obsolete, outer with 
7 apical spines; palp long, with 6 spines on apex of 24 joint and some setae 
on outer margin. Maxilla 2, inner plate fringed on inner margin. Maxillipeds 
normal; last joint of palp very small, tipped with spines. Gnathopod 1 
without distinet palm. Gmathopod 2 stronger, distinetly subchelate. Peraeo- 
pods 1 and 2, 24 joint strongly expanded, glandular, 4 joint broad, cordi- 
form, 5!" minute; finger long, straight. Peraeopods 3 and 4, 24 and 41% joints 
not much expanded, 5'% short, broad, distally scabrous; finger reverted, 
bidentate. Peraeopod 5 normal; 24 joint not broad, densely setose, finger 
as in peraeopods 3 and 4. Branchial vesicles and marsupial plates narrow. 
Pleopods 1—3, peduncle very broadly expanded; the 2 coupling spines 
very slender, with 3 or 4 teeth on each side; 1° joint of inner ramus with 
smoothly concave inner margin. Uropod 1, peduncle longer than outer 
ramus, each spinulose on outer margin; inner ramus Shorter than outer, 
spinulose on inner margin. Uropod 2 similar to uropod 1, but smaller. 
Uropod 3 short, pedunele broadiy produced on inner side; ramus very small, 
tipped with setae. Telson broader than long, apically rounded, 2 small 
patches of microscopie spinules flanking the apex. Occupying tubes, 
constructed or adapted. 


5 accepted species, 1 obscure. 
Synopsis of accepted species: 


Eyes not well developed -—— 2. 


4 Eyes well developed — 8. 
Antenna 1, flagellum less than half as long as 
9 Dedunole ER RER NEE TE HE RER 1.8 (ypieis. : 5, .% p. 682 
Antenna 1, flagellum more than half as long 
as BEER a a rare en 2.8. pallidus . . » . . p: 683 
Uropod 3, ramus möre than half as long as 
DPRRBEIE A 2 sl we ee 8. 8, colletli. . : ..» . p 683 
Uropod 3, ramus not more than half as long 
as peduncle — 4. 
A Uropods 1 and 2, rami stout and strongly spined 4. S. dellavallei . . . . p. 684 
Uropods 1 and 2, rami slight and not strongly 
5 BDIDOH: ae na en En 5. 8. sabatieri. - . . - p- 684 


1. S.typicus Kroyer 1845 $.t., Kroyer in: Naturh. Tidsskr., ser.2 v.1 p.481 
t.7 f.4a—f | 1846 S, t., Kroyer in: Voy. Nord, Crust. t.20 f. la—v | 1893 8. t. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p. 358. 


Body eylindrie but ventrally flattened; peraeon about °/, of total 
length. Head, rostrum and front angles not very prominent. Side-plate 5 


Siphonoeecetes 683 


about thricee as broad as deep, outdrawn behind into a very long point. 
Eyes not visible. Antenna 1 about half as long as body; joints of pedunele 
successively a little shorter, together more than thrice as long as flagellum, which 
is 4—6-jointed. Antenna 2 nearly as long as body, nearly twice as long as 
antenna 1, ultimate joint of pedunele shorter than penultimate, a little 
longer than antepenultimate; flagellum shorter than ultimate joint of pedunele, 
with 1 long and 2 very short joints, last broader than long, tipped with 2 diver- 
gent spines. Antennae 1 and 2 very setose. Gmathopod 1, 5tk joint a 
little longer and distally much broader than the conical 6", which has strong 
spines on hind margin; finger about half as long as 6% joint, with 7 or 8 
serrations on inner märgin, and with a tuberele near the apex. Gmathopod 2 
slightly shorter but far stouter than gnathopod 1, 24 joint °/, as broad as 
long, 4 produced with blunt apex, 5th cup-shaped, its narrow lobe tipped 
with a strong spine looking like a eontinuation of the lobe, 6! oval, hind 
margin much more convex than front, with 7 large spines on it successively 
larger to the palm, which is shorter and has 2 sharp tubercles; finger curved, 
acute, with about 10 teeth, and near the apex a tubercle and 2 long setae. 
Peraeopods 1 and 2 not differing from those of S. colletti. Uropod 3, peduncle 
broadly produced on inner side, ramus scarcely produced beyond it, oval or 
somewhat conical, with 12 strong setae. Telson much broader than long, 
bare. Colour pale yellow, marbled with brown. L. 6 mm. 


Arctie Ocean (Greenland). Depth 30—35 m. 


2.8, pallidus OÖ. Sars 1882 $.p., G. O. Sars in: Forh. Selsk. Christian., nr. 18 
p- 113 t.6 $.7a—d, 7x | 1894 S.»., G. O. Sars, Crust. Norway, v.1 p.611 t.218 £.2| 
1893 S. typieus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 858. 


Head, rostrum small; lateral corners extremely narrow, not widened 
apically. Eyes replaced on each side by a small patch of an opaque whitish 
pigment. Antenna 1 not reaching end of penultimate joint of peduncle of 
antenna 2; joints of peduncle successively shorter; flagellum about half as 
long as peduncle, with 7 joints. last minute. Antenna 2 nearly as long as 
body, ultimate joint of pedunele shorter than penultimate. Gnathopod 1, 
6tb joint much narrower than 5! and scarcely tapering distally. Gmathopod 2, 
6'ı joint armed with 5 spines on hind margin. Uropod 3, inner expansion 
‘of peduncle comparatively narrow, ramus very small, not reaching beyond 
expansion of peduncle. Colour pale yellowish. L. about 4 mm. 


Arctie Ocean and North-Atlantie (West-Norway up to Hasvig [Finmark]). Depth 
94—282 m. Usually in shells of Dentalium. 


| 
2 
| 
| 


3. 8. colletti Boeek 1862 S. typicus (err., non Kroyer 1845!), Bate & Westwood, 
Brit. sess. Crust., v. 1 p. 465 f. | 18953 S. £. (part.), A. Della Valle in: F. Fl. Neapel, v. 20 
p- 358 | 1871 S. eolletti, A. Boeck in: Forh. Selsk. Christian., 1870 p. 258 | 1876 8. e., 
A. Boeck, Skand. Arkt. Amphip., %.2 p.633 t.28 f.9 | 1894 S. c. (S. mucronatus Aug. 
Metzger in MS.), G. ©. Sars, Crust. Norway, o.1 p. 610 t.218 £.1.| 1871 S. cuspidatus, 
Aug. Metzger in: Jahresber. Ges. Hannover, v.21 p.30 | 1873 S. ce. (sp. norv.!), (8. I. 
Smith in:) A. E. Verrill in: Rep. U. S. Fish Comm., v.1 p. 501. 566. 


Head, rostrum acute (Sars: short, triangular; Smith: long, slender); 
lateral lobes much produced, apically swollen, carrying the well developed, 
rounded, dark eyes. Antenna 1 considerably exceeding half length of body, 
reaching beyond penultimate joint of peduncle of antenna 2 (Sars), about to 
middle of that joint (Smith); 3 joints of pedunele subequal; flagellum deeidedly 
(Sars)*or scarcely (Smith) longer than a joint of peduncle, 5--7=jointed. 


684 Siphonoecetes 


Antenna 2 about as long as body, ultimate and penultimate joints of peduncle 
subequal or ultimate the shorter; flagellum shorter than ultimate joint of peduncle, 
with 3 joints, the last 2 very small. Gnathopod 1, 6** joint about as long..as St, 
conically tapering, hind margin armed with 3 strong spines. Gnathopod 2 rather 
strong; 24 joint rather short and thick, 4 produced to obtuse setose 
prominence, 5t" having on its narrow lobe a stout spine and several setae, 
6tk large, oblong oval, hind margin armed with 6 spines, larger as they 
approach the short, not very oblique palm. Gmnathopods 1 and 2 vf the 
very same structure in the two sexes (Sars), gnathopod 2 in Q more slender 
than in the J (Smith). Peraeopods 1 and 2, 4 joint very large and 
expanded, nearly cordiform in outline. Uropod 1 (in figure), peduncle spinose on 
outer, not on distal margin, outer ramus °/, as long as peduncle, with 11 spines 
on straight outer margin, inner ramus much shorter. Uropod 2 with a 
spine-fringed, distal lobe, outer ramus not much shorter than peduncle, 
fringed with spines on outer margin. Uropod 3, pedunele expanded inside 
to a broad setiferous lobe; ramus more than half as long as peduncle, 
obliquely truncate apex with 1 spine and 7 setae. Colour greyish white, varied 
with yellowish brown, antenna 2 with yellow and brown bands. L. 4—8 mm. 

North-Atlantie, North-Sea and Skagerrak (South- and West-Norway, depth 
11-37 m; Shetland Isles, depth 73-—-164 m; Firth of Forth; Vineyard Sound and Buzzard 
Bay); Köttogat. 

4. S. dellavallei Stebb. 1893 $. typicus (part.), A. Della Valle in: F. Pl. 
Neapel, %.20 p.358 t.4 f.11—13, t.7 f.23—28 | 1899 8. dellavallei, T. Stebbing in: 
Ann. nat. Hist., ser. 7 v.3 p. 241, 350. 

Differs from S. pallidus (p. 683) in having a well developed acute rostrum 
and the eyes well developed, dark in spirit, but conspicuous from their abundant. 
white pigment.. Antenna 1 scarcely reaching ultimate joint of pedunele of 
antenna 2; flagellum less than half as long as pedunele, with 5 joints, the 
last minute. Antenna 2, ultimate joint of peduncle shorter than penultimate. 
Side-plate 1 rather blunt- in front. Appendages in general little different 
from those of S. pallidus. Colour yellowish white with patches of brown, 
antennae annulate with white and brown. L. 5—6 mm. 

Constructing free tubes. 

Bay of Naples. Depth 10—20 m, on fine sand. 

5. S.sabatieri Rouv. 1894 8.s., Rouville in: C.-R. Ass. France, Sess.23 v.1.p. „173. 

In general agreement with S. colletti (p. 683), except as to uropods 1—3. 
Uropod 1, pedunele much longer than rami, not obviously spinose on outer margin, 
but closely fringed with spines on distal border; outer ramus not much longer 
than inner, with 6 or 7 spines along cönvex outer margin. Uropod 2, peduncle 
as in uropod 1; rami slender, outer rather the longer, about half as long 
as peduncle; both rami smooth except for 2 apical spines. Uropod 3, peduncle 
expanded on inner side to a narrow setiferous lobe; ramus not half as long 
as peduncle, little more than a eylindrical tuberele, tipped with a couple .of 
setae. In peraeopods 1 and 2 the 24 joint is very largely expanded, and 
in peraeopods 3 and 4 the bulbous 5*" joint appears to be scabrous all over. 
L. slightly under 4 mm. 

Gulf of Lion (Etang de Thau). In small univalve shells. 

S. kröyeranus (Bate) 1857 Siphonocetus k., Bate in: Ann. nat. Hist., ser. 2 
v.19 p.149 | 1862 Siphonoecetes whitei (err., non Cerapus w. Gosse 1853!), Bate &Westwood, 


Brit. sess. Crust., v.1 p.467 f. | 1862 Siphonoecetus w., Bate, Cat. Amphip. Brit. Mus., 
p. 270 t.45 £.10. 


English Channel (Weymouth). 


2, 2 Me 
NE a 


Corophium 685 


1l. Gen. Corophium Latr. 3 


?1793 Cymothoa (part.), J. ©. Fabrieius, Ent. syst., v.2 p.503 | 1806 Corophium 
(Sp. un.: CO. longicorne), Latreille, Gen. Crust. Ins., v.1 p.58 | 1888 C., T. Stebbing in: 
Rep. Voy. Callenger, v.29 p.79, 1670 | 1893 C., A. Della Valle in: F. Fl. Neapel, v.20 
p-362 | 1894 C., G. O. Sars, Crust. Norway, v.1 p.612 | 1895 C., G. O. Sars in: Bull. 
Ace. St.-Pötersb., ser. 5 v.3 p.291 | 1813/14 C., Corophrium, Leach in: Edinb. Ene., 
v.7 p.432 | 1830 Corophia, H. Milne Edwards in: Ann. Sei. nat., v.20 p.384 | 1851 
Audouinia (nom. nud.), (A. Costa in:) F. W. Hope, Cat. Crost. Ital., p. 24. 


Body depressed throughout. Head with narrow lateral lobes. Side- 
plates small, discontinuous, 1° conieally produced, tipped with setae. Eyes 
small or imperfectly developed, on lateral lobes of head. Antenna 1 without 
accessory flagellum; flagellum slender, with several joints. Antenna 2 (Fig. 116, 
117p.691) strong, pediform, usually much longer in C than in 9; flagellum 
short, 3-jointed, with apical hooked spines. Upper lip broad. Lower lip 

normal. Mandible with 2-jointed palp, slender, each joint carrying a strong 
plumose seta; other parts normal. Maxilla 1, inner plate nearly obsolete, 
outer with 7 spines on apical margin, 24 joint of palp long. Maxilla 2, 
inner plate fringed on inner margin. Maxillipeds, inner plates narrow, without 
apical spine-teeth, outer long, narrow, with slender spines on inner margin; 
finger of palp small, with apical spine. Gnathopod 1 slender, the short 
projeeting 39 joint and long 5!" densely fringed with long setae; 6'k joint 
narrow, with short palm. Gmnathopod 2 rather larger, 4" joint closely atta- 
ched to hind margin of 5t%; its own convex hind margin fringed with very 
long plumose setae in 2 rows; 6!" joint sublinear, without palm. Peraeo- 
pods 1 and 2, 24 and 4 joints somewhat expanded, 5'% very short; finger 
slender. Peraeopods 3 and 4, 2° joint moderately expanded, 4th produced in 
front of the short 5, which carries 2 oblique rows of spines, 6! slender, 
not long; finger short, reverted. Peraeopod 5 long and slender, 24 joint 
fringed on both margins with long setae. No branchial vesicles on gnathopod 2. 
Marsupial plates narrow. Pleopods 1—3, peduncle greatly expanded on inner 
side; the 2 coupling spines with several teeth; inner ramus the longer, without 
left spines on 1° joint. Uropods 1 and 2, rami rather short, with strong 
spines on outer margin. Uropod 3, peduncie short, ramus single, laminar, with 
some fringing setae. Telson entire, small, distinet (Fig. 115,118, p. 686, 691). 


12 species accepted, 7 obscure. 


Synopsis of accepted species: 


Pleon segments 4—6 distinet — 2. 


Pleon segments 4—6 coalesced — 11. 
9 Uropod 3, ramus oval — 8. u 
Uropod 3, ramus parallel-sided — 6. 
3 | Antenna 2 not chelate — 4. 
Antenna 2 chelate — 5. \ 
A zaman obkaselw Damtad. » see 1. C. volutator. . . p. 686 
Telson transversely truneate. . . ....... 2. C.nobile . . . . p.687 
5 Pleon segments 4—6 smooth . . ... 2... 3. C. chelicorne . . p. 687 
Pleon segments 4—6 spinulose . .» ...... 4. C.spinulosum . p.688 
6 Uropod 3, ramus linear — 7. 
Uropod 3, ramus not linear — 8. 
- { Antenna 1 ind, 1st joint without process . .‘. 5. C.affine . . . . p.688 
Antenna 1 in, 1st joint with hooked process . 6. C. runeicorne. . p.689 


686 Corophium 


Antenna 2, ultimate joint of peduncle apically 
prodnesdi.: 22 KETTE REN 7. C.robustum . . p. 689 
Antenna 2, ultimate joint of peduncle not apically 
produced — 2. 
Peraeopod 5, joints 4—6 broad . . » 2.2... 8. C. mucronatum . p. 689 
9 N Peraeopod 5, joints 4—6 narrow — 10, 
| Antenna 2, penultimate joint of peduncle with 


inner tooth to apical process. . » » 2.2... 9.C 
10 Antenna 2, penultimate joint of pedunele without 
inner tooth to apical process. ». ». 2... 10. ©. monodon. . . p. 690 
Antenna 2 in 9, penultimate joint of peduncle 
1 DES WERE Ba ee A RE 11. cC 
Antenna 2 in 2, penultimate joint of peduncle 


DOR ABB 12. ©. bonellii . . . p.691 


1. C. volutator (Pall) 1710 „Pulex marinus cornutus“, Jo. Ray, Hist. Ins., 
p.43 | ?1761 Oniscus bicaudatus, Linns, Fauna Svec., ed.2 p.500 | ?1793 Cymothoa 
bicaudata, J. ©. Fabrieius, Ent. syst., .2 p.507 | 1898 Corophium bicaudatum, A. Della 
Valle in: F. Fl. Neapel, v.20 p.372 t.56 f.2—6 | 1766 Oniscus volutator, Pallas, Misc. 
zool., p.192 t.14 f.20 | 1888 Corophium v., 'T. Stebbing in: Rep. Voy. Challenger, v.29 
p-21, 29, 34 | 1893 C. v., Chevreux & E. L. Bouvier in: Ann. Sei. nat., ser.7 v.15 p.140 | 
1767 Cancer grossipes, Linn, Syst. Nat., ed. 12 «2 p.1055 | 1777 Gammarus g.,.J. ©. 
Fabricius, Gen. Ins., p. 248 | 1856 Corophium g., R. Templeton in: Mag. nat. Hist., v.9 
p.12 | 1876 C.g., A. Boeck, Skand. Arkt. Amphip.,' v.2 p.623 t.28 f.6 | 1894 C. g., 
G. ©. Sars, Crust. Norway, v.1l p.614 t.219 | 1896 ©. g., Sowinski in: Mö&m. Soc. Kiew, 
v.15 p.873 (distribution) | 1777 Astacus linearis, Pennant, Brit. Zool., ed.4 0.4 p.17 t.16 
f.831 | 1779 Gammarus longicornis, J. C. Fabricius. Reise Norweg., p:258 | 1793 @. 1, 
J. ©. Fabrieius, Ent. syst., v.2 p.515 | 1806 Corophium longiecorne, Latreille, Gen. Orust. 
Ins., v.1 p.59 | ?1874 (©. bonelli, Ritzema Bos, Bijdr. Crust. Hedriophthal., p. 54. 


Body moderately slender, pleon segments 4—6 distinet. Head, rostrum 
small; lateral lobes narrowly rounded, not very prominent. Side-plate 1 with 
about 5 setae on produced apex. Eyes very gmall, dark. Antenna 1 in J 
nearly half, in Q little more than ’/, as long as body; 1° joint longer than 
22 and 39 combined, in C serrulate below, in @ with 2 stout spines; flagellum 


. erassicorne . p. 690 


nearly as long as pedunele, 12—14-jointed. Antenna 2 in JS as long as 


body; penultimate joint of peduncle stout and long, lower-margin produced 
to a short tooth bounding an apical sinus; ultimate joint much narrower, nearly 


as long, without any tooth, much longer than 


the 3-jointed flagellum. Antenna 2 in © 
about half as long as body, except for 
shortening of ultimate and penultimate joints 
of peduncle, constructed as ind. Gnatho- 
- Uropod a Pod 1, 5% joint rather longer than 6"; 
6th widening a little distally; palm nearly 
FERREE ER transverse and matching finger. Gnathopod 2, 
Tach. een tells 5th joint rather shorter than 6%"; finger rather 

[After G. O. Sars.] long, perfectly smooth. Peraeopods 1 and 2, 
finger scarcely longer than 6th joint. Peraeo- 


pods 3 and 4, 4tk joint’ setose on both margins. Peraeopod 5, 24 joint oval,‘ 


well expanded. Uropod 3, pedunele broader than the rounded oval, setose, 
ramus. (Fig. 115). Telson almost an equilateral triangle, with obtusely 


pointed apex. Colour whitish, marbled with brown on back and antenna 2. 
L. 6 mm. 


North-Atlantie with adjoining seas (Europe from West-Norway to the Adriatie). 
Forming tubular galleries in the mud of tidal swamps. 


. eurvispinum . p-690 _ 


Aura da FAN 
er. 2 


en LU LUD LU u zu 


Corophium 687 


2. C.nobile O. Sars 1895 C.n., G.O.Sars in: Bull. Ace. St.-Petersb., ser.5 v.3 
p-292 t.20, 21 | 1896 ©. n., Sowinski in: Möm, Soc. Kiew, vo. 15 p. 375. 


Segments of pleon distinet. Head with short broad triangular rostrum. 
Side-plate 1 the largest, produced forward to a narrowly rounded lobe, carrying 
many setae, some of them plumose. Eyes small, rounded, dark; visual 
elements seeming to be imperfectly developed. Antenna 1 very slender, 
in d more than half as long as body, rather longer than in 9 ; peduncle 
setose, densely in J; 1° joint not quite so long as 24 and 34 combined, 
with 2 teeth on lower margin; 34 joint scarcely more than half as long as 24; 
flagellum with about 20 joints, filiform, in Q subequal to pedunele, in S longer. 
Antenna 2 subpediform, in J more than °®/, as long as body, much smaller 
in 9; first 2 joints eoalesced, as long as 34; penultimate joint of pedunele 
large, tumid in C, in both sexes produced into 2 strong teeth, the outer 
the longer; ultimate joint sublinear, much shorter than penultimate, a somewhat 
recurved tooth of its lower margin adapted to pass between the 2 apical 
teeth of the penultimate; flagellum not quite as long as ultimate joint of 
peduncle, setose, with 1 long and 2 very short joints, the last tipped 
with 2 curved spines. Upper lip somewhat quadrate with dentiform 
projection from surface. Gnathopods 1 and 2 as in C. volutator. Peraeopods 1 
and 2 comparatively slender; 24 joint slightly expanded, 4" subequal to 5" and 
6% combined, its front margin in J fringed with long diverging setae, 6% very 
narrow, conically tapering, finger subequal to it, slender, acute. Peraeopod 3, 
24 joint narrowly oval, hind margin straight, almost smooth, 4!" with front 
apex produced, 5!k with 2 oblique rows of curved spines on the outer side, 
the lower row of 6 ending at the produced hind corner; 6% joint longer, 
linear; finger short, curved. Peraeopod 4 similar, but with longer joints 
and hind margin of 24 curved, fringed with plumose setae. Peraeopod 5 
much longer, more than half as long as body; 24 joint broadly oval, narrowest 
distally, densely setose, 4—6tl linear, 6!" the longest; finger short, curved, 
acute. Uropods 1—3 as in C. volutator. Telson transversely truncate. 
Colour, dark brown in bands or mottled; antenna 2 obliquely banded. 


"L. 9 10, d 11mm. 


Caspian Sea. Depth to about 75 m. 


3. ©. chelicorne O.Sars 1895 C.c., G.O.Sars in: Bull. Ac. St.-Petersb., ser.5 
0.3 p.299 t. 22. 


Pleon segments distinet, division between 5t® and 6tk rather obscure. 
Head, front. convex, without rostrum. Side-plate 1 with only 3 slender setae 
at apex, Eyes very small, rounded, dark. Antenna 1 rather short, in Q only 
about '/, as long as body, sparingly setose; 1° joint as long as 24 and 
39 combined, witlı about 7 spinules on lower margin in Q, not in Cd; 
24 joint more than twice as long as-34 in C, notin O ; flagellum shorter than 
pedunele, with 15 joints ind, 10 in ©. Antenna 2 strong, in C ?/, as long 
as body; the large penultimate joint of peduncle with small inner tooth at 
apex, and an outer tooth produced to the end of ultimate joint, which is only 
about half as long as penultimate and has a short stout recurved prominence 
below middle of lower margin and a strong apical tooth, eapable of erossing 
the chela-forming tooth of penultimate; flagellum 3-jointed, subequal to 
ultimate joint of peduncle. Gnathopods 1 and 2 as in Ü. volutator. Peraeo- 
pods 1 and 2, 4 joint rather longer than 5t and 6th eombined, Stk very 
short, 6% not quite linear, finger rather shorter. Peraeopods 3 and 4 
as in C. nobile. Peraeopod 5, 6! joint nearly twice as long as 5tt, Uropods 


688 Corophium 


as in €. nobile (p. 687), except that rami of uropods 1 and 2 are without 
spines on inner margin. Telson and colour as in C.nobile. L. 9 7, d 8 mm. 


Caspian Sea. Depth 10—80 m. 


4. C.spinulosum O0. Sars 1896 C. s.,, G. O. Sars in: Bull. Ac. St.-Pöätersb., 
ser.5 v.4 p. 481 t.12 £. 18—25. 


Segments of pleon distinet, 4--6th with spinules along hind margin, 
4th and 5th with lateral spinules. Head with frontal margin only slightly 
convex.‘ Side-plate 1 with 4 apical setae and several setules. Eyes very 
small, rounded. Antenna 1 slender, sparsely setose, in Q nearly half as 
long as body; 1° joint about as long as 24, with 2 spines on lower margin; 
flagellum rather longer than peduncle, about 14-jointed. Antenna 2 in JG, 
penultimate joint of pedunele with large process, broad at base, with small 
dentiele on its inner side, its acute apex chelately crossing the small apical 
tooth of the ultimate; in © process of penultimate joint much smaller, reaching 
about to middle of ultimate, which is almost simply eylindrie; flagellum 
rather shorter than ultimate joint of peduncle. Gnathopod 2, finger smooth, 
with only a few slender hairs. Peraeopods 1 and 2, 4! joint slightly expanded, 
not very setose; finger very long and slender, rather longer than 6tk joint. 
Peraeopod 5, 24 joint densely setose, the slender terminal joints having 


spinules as well as setae. Uropods 1 and 2 with numerous spines on both 


margins of pedunele and rami. Uropod 3, the ramus armed with spines as 
well as setae. Telson ending obtusely (in figure), distinguished by a rather 
«onspieuous erect spine on each side of its base. L. © 95 mm. 


Caspian Sea. Depth 45 m. 


5. C. affine Bruz. 1859 C.a., R. M. Bruzelius in: Svenska Ak. Handl., n. ser. 
v.8 nr.1 p.16 | 1876 ©. a., A. Boeck, Skand. Arkt. Amphip., v.2 p.629 t.28 f.7 | 1893 
C.a., A. Della Valle in: F. Fl. Neapel, v.20 p.371 t.55 f.60 | 1894 C.a., G. O. Sars, 
Crust. Norway, v.1 p.618 t.221 f.2 | ?1898 C.a., Sowinski in: M&m. Soc. Kiew, v.15 
p. 457 | 1869 C. tenwicorne (2), A. M.Norman in: Rep. Brit. Ass., Meet. 38 p. 286. 


Body rather slender, pleon segments 4—6 distinet. Head without 
distinst rostrum; lateral lobes prominent, acute. Eyes represented by a 
small patch of opaque white pigment on each side. Antenna 1 rather long 
and slender; 1° joint narrowing distally, with 6 recurved spines at base, 
and 4 slender spines below, 24 very slender, scarcely shorter than 1°%; flagellum 
less than half as long as peduncle, 6-jointed. Antenna 2 in J about °/, as 
long as body; penultimate joint of pedunele very large, distal tooth quite small, 
inner tooth a small tuberele; ultimate joint not nearly half as long, narrow, 
with sinuous lower margin, produced distally in a tooth-like process; 1° joint 
of flagellum with distal nodiform projection. Antenna 2 in O rather feeble, 
not longer than antenna 1; glandular-process at base very long; antepenultimate 
joint of pedunele with single spine, penultimate simply eylindrical with 3 
slender spines, ultimate more than half as long, with 4 spines distributed. 
Gnathopod 1, 6 joint very narrow, not at all widened distally; finger 
denticulate, with prominent subapical tooth. Gnathopod 2 as in (. erassicorne 
(p. 690); finger with denticle near apex. Peraeopods 1 and 2, 4 joint little 
expanded; finger a little longer than 5th and 6tk joints combined. Peraeopod 5 
very long and slender, 24 joint very little expanded, its hind margin slightly 
concave. Uropods 1 and 2, rami slender, apical spines unusually long. 
Uropod 3, peduncle longer than broad, ramus linear, setae almost confined 


Corophium ' 689 


to the apex. Telson nearly as long as broad; apex narrowly truncate. Colour 
uniformly pale yellowish. L. 4 mm. 
Arectie Ocean, North-Atlantie, North-Sea and Skagerrak (Norway southward from 


Lofoten Islands; Bohuslän; East Frisian Coast, depth 19—56 m; Shetland Isles); 
Kattegat; Boaphorus? 


6. C. runeicorne DellaValle 1893 C. r., C. runeinatum, A. Della Valle in: F. 
Fl. Neapel, v.20 p. 13, 369 t.4 f.7, t.8 f.1--16, 19 | 1898 CO. runeicorne, Sowinski in: 
M&m. Soe. Kiew, v.15 p. 456. 


In elose agreement with C. affine, but with a few distinguishing 
points. Antenna 1 in SC, 1% joint with strong curved tooth direeted forward 
near the base; fiagellum 8—lU-jointed. Antenna 2 in d, ultimate joint 
of peduncle apparently without the distal tooth; 1° joint öf flagellum much 
longer than 24 and 34 combined, and with 4 teeth or nodules on its lower 
margin. Gnathopod 1, finger much longer than apex of 6!" joint, and with 
subapical tooth very large. Gnathopod 2, finger without denticle, but broad 
at base, and abruptly narrowed near apex. Peraeopods 1 and 2, finger 
much longer than 5tt and 6tk joints combined. Telson apically rounded. Colour 
pale yellowish, slightly brownish on the back. L. 4—5 mm. 


Bay of Naples, depth 10—20 m; Bosphorus, depth 44—85 m. 


7. C. robustum O.Sars 1895 C.r., C©. bidentatum, G.O. Sars in: Bull. Ae. 
St.-Petersb., ser.5 v.3 p. 804; t.23 £.10—16 | 1896 C. r., Sowinski in: M&m. Soc. Kiew, 
v.15 p. 376. 


Back broad, flattened; pleon segments distinet, but 5tk from 6tk not 
very sharply. Head with obtuse-angled front. Side-plate 1 as in ©. chelicorne 
(p- 687). Eyes small, dark. Antenna 1 in Q not '/, as long as body, 
in J with densely setose peduncle; 24 joint shorter in Q than in d, in 
both considerably shorter than 1%; flagellum shorter than peduncle, about 
12-jointed. Antenna 2, even in Q very robust, in S more than °/, as long 
as body; penultimate joint of peduncle nearly as long as ultimate and 
flagellum combined, apically produced to a moderately long, slightly eurved, spini- 
form projection, with small bilobed expansion within at its base; ultimate joint 
with recurved tooth above the middle and spiniform apical tooth; flagellum scarcely 
as long as ultimate joint of peduncle. Peraeopods 1 and 2, 24 joint laminar, . 
with long setae on front margin, 4% rather broad, about as long as 5tk and 
6th combined, in JS densely setose in front. Peraeopod 5 considerably more 
than half as long as body. Uropods 1 and 2, rami without spines on inner 
margin. Uropod 3, ramus parallel-sided. Telson truncately triangular. Colour 
dark. L.9 7, 0 8 mm. 


Caspian Sea. Depth to 75 m. 


8. C. mucronatum 0. Sars 1895 C. m., G. O. Sars in: Bull. Ace. St.-Petersb., 
ser.5 v.3 p.307 t.24 f.1—7 | 1896 C©. m., Sowinski in: Möm. Soe. Kiew, v.15 p. 375. 


Segments of pleon distinet, 5tk from 6 not very sharply. Head with 
sharp rostral point advanced beyond the narrow front corners. Eyes small, 
rounded, dark. Antenna 1 more than '/, as long as body, little setose; 
1° joint longer than 24 and 34 combined, with 3 distant spinules; flagellum 
subequal to pedunele, 12-jointed. Antenna 2 little more than half as long 
as body, strong; penultimate joint of peduncle inflated, with mucronate 
projeetion reaching beyond middle of ultimate, and having a small tooth at 
its base within, near to which the eylindrie ultimate joint of peduncle puts 

Das Tierreich. 21. Lief.: T.R.R. Stebbing, Amphipoda I, 44 


690 Coro phium 


forth a small recuryed tooth; flagellum rather shorter than ultimate joint of 
peduncle. Peraeopods 1 and 2, 24 joint deeidedly laminar, 4 distally 
wide, with slender setae on front, finger subequal to the stoutish 6" joint. 
Peraeopod 5 about half as long as body; 46th joints rather broad and 
compressed, bordered with fascieles of slender setae. L. S 6 mm. 


Caspian Sea. 


9, C.curvispinum O.Sars 1895 ©. c., G.O.Sars in: Bull. Ac. St.-Pötersb., ser. 5 
v.3 p. 302 t.23 f.1—9 | 1896 C. c., Sowinski in: M&m. Soc. Kiew, v.15 p. 375. 


Segments of pleon distinet, 5" from 6tk not very sharply. Head 
slightly angular at centre; front corners narrow, rather prominent. Eyes 
small. Antenna 1 in J very setose; 24 joint of peduncle fully as long as 1%; 
flagellum scarcely longer than 2 and 34 joints of peduncle combined, 12-jointed. 
Antenna 1 in Q scarcely '/, as long as body, sparingly setose; 18% joint of 
pedunele as long as 24 and 34 combined, with 4 or 5 spinules below; 
flagellum shorter than pedunele, 9-jointed, Antenna 2 in J nearly as long 
as body, penultimate joint of peduncle widening distally, produced to a 
strongly ineurved spiniform tooth, with slightly celeft tooth at its base within; 
ultimate joint of pedunele nearly as long as penultimate, cylindrie, a reeurved 


tooth near the base meeting the incurved point of the penultimate; flagellum 


shorter than ultimate joint of peduncle. Antenna 2 in © much less strongly 
developed. Gmnathopods 1 and 2 of the usual character. Peraeopods 1 and 2 
short and stout, 24 joint laminar, 4 nearly as broad as long, setose on 
both margins; finger as long as 6% joint. Peraeopod 5 slender, about 
half as long as body. Uropod 2 short and stout, spines on the rami not 
numerous. Uroped 3 not very stout. L.Q 6, @ 7 mm. 


Caspian Sea. 


10. ©. monodon O0. Sars 1895 ©. m., G.. ©. Sars in: Bull. Ace. St.-Petersb., 
ser.d v.3 p.309 t.24 f.8—16 | 1896 C. m., Sowinski in: Mem. Soc. Kiew, v.15 p. 374. 


Body rather slender, especially in d. Pleon segments all distinet. 
Head, rostral projection almost a right angle, front corners narrow, little 
prominent. Eyes large, rounded, dark. Antenna 1 less than half as long as body; 
peduncle in CO setose below, in © sparingly setose; 1° joint longer than 24 
and 34 combined, with 1 spinule at end of the joint; flagellum in J shorter 
than pedunele, 12-jointed, in Q as long as pedunele, 10-jointed. Antenna 2 
in J about ®/, as long as body; penultimate joint of peduncle not greatly 
inflated, almost eylindrie, produced to a simple narrowly mucronate tooth, 
not nearly reaching middle of ultimate and without inner tooth; ultimate joint 
with rudiment only of a tooth near base; flagellum searcely half as long as 
ultimate joint of pedunele Antenna 2 in Q not longer than antenna 1, 
about '/, as long as body, without even rudiment of a tooth on ultimate joint of 
peduncle. Peraeopods 1 and 2 slender; peraeopod 5 about half as long as 
body. Uropod 2 very small, compared with uropod 1. Uropod 3, ramus 
mueh narrower than pedunele, with 1 spine among a few apical setae. 
Peraeon segment 7 and the rest of hind part of body almost devoid of 
pigment. L.Q 4, 9 5 mm. 


Caspian Sea. Depth to 75 m. 
1l. C. erassieorne Bruz. 1859 CO. c., R.M. Bruzelius in: Svenska Ak. Handl., 


n.ser. ©.8 nr.1 p.15 t.1 f.2 | 1876 CO. e., A. Boeck, Skand. Arkt. Amphip., v.2 p. 626 
t.28 f.8 | 1879 ©. c. (part.), Hoek in: Tijdsehr. Nederl. dierk. Ver., v.4 p.115 t.5 £.16, 


Corophium 691 


t.8 £.4—10 | 1889 C. c., Hock in: Tijdschr, Nederl, dierk. Ver., ser.2 v.2 p.230 | 1893 
C. c., A. Della Valle in: F. Fl. Neapel, v.20 p.867 t.55 f. 58,59 | 1894 C. c., G. O. Sars, 
 Crust. Norway, v1 p.615 t.220 | 1896 & 98 C. c., Sowinski in: M&m. Soc, Kiew, v.15 
p-373, 455 | 1862 C. spinicorne (2) (non Stimpson 1857!), Bate, Cat. Amphip. Brit. 
Mus., p.281 t.47 f.5 | 1863 ©. bonellü (part.: 2), Bate & Westwood, Brit. sess. Urust., 
v.1 p.497 f. | ?1868 ©. b., Czerniavski in: Syezda Russ. Est., Syezda 1 Zool. p. 96. 

Body broad, pleon segments 4—6 coalesced. Head, rostrum short, 
distinet, acute; lateral lobes prominent, acute. Side-plate 1 with 3 setae on 
the produced apex. Eyes small, rounded, dark brown with whitish coating. 
Antenna 1 scarcely '/;, as long as body in oO and less than '/, ind; 1° joint 
nearly as long as 24 and 34 combined, thick above, with 4 recurved spines at 
base, compressed below with row of about 6 spines; 34 joint much shorter 
than 24; flagellum shorter than pedunele, 6-jointed. Antenna 2 ind (Fig.117) 


; Uropod ı 


Flagellum 
Uropod 3 --- 


Fig. 116. Fig. 117. : Fig. 118. 
Antenna 2, 2. Antenna 2, Q. Uropods 1—3 and telson. 


Fig. 116—118. O©. erassicorne. [After G.O. Sars.] 


stout, scarcely as long as body; penultimate joint of peduncle large, with 2 apical 
teeth, the outer reaching the sub-basal tooth of the ultimate, which is much 
shorter and narrower than the penultimate, and has a small apical tooth, a little 
separated from line of lower margin; 1° joint of flagellum with long setae, 
Antenna 2 in © (Fig. 116) little longer than antenna 1, stout; antepenultimate 
joint of peduncle with 3 or 4 stout spines, penultimate with 8—12 such 
spines along the sharp edge of its broad laminar expansion; ultimate joint 
of peduncle little more than half as long, with a strong median spine. 
Gnathopods 1 and 2 as in C. volutator (p. 686), except that the slender 
finger of gnathopod 2 has an inner dentiele. Peraeopods 1—5 as in C. 
volutator, except that in peraeopods 1 and 2 the finger is relatively longer, 
in peraeopods 3 and 4 the 4" joint less setose, and that peraeopod 5 is some- 
what more slender. Uropod 3, ramus oblong oval, nearly twice as large as 
peduncle (Fig. 118). Telson rather more obtusely rounded than in C. volutator. 
Colour whitish mottled with light brown. L. about 5 mm. 

Aretie Ocean, North-Atlantie with adjoining seas (Jan Mayen; Europe from Vadsö 
[Norway] to West-France, depth 11—37m); Bosphorus. Found in Norfolk in almost 
fresh water. 

12. C. bonellii (M.-E.) 1830 Corophia b., H. Milne Edwards in: Ann. Sci. nat., 
v.20 p.385 | 1840 Corophium b., H. Milne Edwards, Hist. nat. Crust., v.3 p.67 | 1862 
©. b., Bate, Cat. Amphip. Brit. Mus., p. 282 | 1893 C. bonelli, A. Della Valle in: F. Fl. 
Neapel, v.20 p.368 | 1894 C. b., G. O. Sars, Crust. Norway, v.1 p. 616 t. 221 £.1. 

Oo. Pleon segments 4—6 coalesced. Head without proper rostrum, front 
produced in a broad triangle; lateral lobes short, apically rounded. Eyes 
large, very. dark. Antenna 1 about '/, as long as body; 1° joint slightly 
shorter than 24 and 34 combined, with small hooked spine near base and 

44* 


692 Corophium 


3 spines along. lower margin; flagellum more than half as long as peduncle, 
6-jointed. Antenna 2 little longer than antenna 1, not very stout; penultimate _ 
joint of pedunele nearly eylindrie, with 3 strong spines on margin, ultimate 
rather shorter, with a spine beyond centre of lower margin. Gnathopod 1, 
6th joint widening a little distally, palm rather oblique, finger extending 
very little beyond it. Gnathopod 2, finger with subapical denticle. Peraeo- 
pods 1 and 2, 4th joint rather broad, 5t" very short, finger subequal to 
5th and 6tk combined. Peraeopod 5, 24 joint oval, the others very slender. 
Uropod 3, peduncle very short, ramus broadly oval, fringed with 7—9 setae. 
Telson twice as broad as long, transversely truncate at apex. Colour whitish, 
dorsally banded with dark brown. L. 6 mm. — G unknown. 
North-Atlantie, North-Sea, Skagerrak and English Channel (South- und West- 
Norway up to the Trondhjemsfjord; South-England; West-France). Depth 11—19 m. 


: C. acherusieum A. Costa ?1851 Audowinia acherusica (nom. nud.), (A. Costa 
in:) F.W. Hope, Cat. Crost. Ital., p.24 | 1857 Corophium acherusicum, A. Costa in: 
Mem. Ace. Napoli, v. 1 p.232 | 1893 C.a., A. Della Valle in: F. Fl. Neapel, v.20 p. 364 
t.1 £.11; 1.8.17, 18, 20—41 | ?1898 C. a., Sowinski in: Mem. Soc. Kiew, v.15 p.455 | 
1897 ©. bonellii (part.), (T. Stebbing in:) H. J. Hansen, Choniostom., p. 113, 114. 


Perhaps identical with €. bonellii (p. 691). 

Mediterranean; tropieal Atlantic (Cuba); tropieal Paeific (Hong Kong). 

C. contractum Stimps. 1855 C.ce., Stimpson in: P. Ac. Philad., v.7 p.383 | 
?1881 ©. c., G.M. Thomson in: Tr. N. Zealand Inst., v.13 p.220 t.8 f.9 | 1893 ©. c., 


A. Della Valle in: F. Fl. Neapel, v.20 p. 374 | ?1886 C. bonnelli, G.M. Thomson & Chilton 
in: Tr. N. Zealand Inst., v.18 p. 142. 


Possibly identieal with C. bonellii (p. 691). & 3—4 mm. 
Pacifie (Japan, New Zealand). 
C. eylindrieum (Say) 1818 Podocerus ceylindricus, Say in: J. Ac. Philad., v. lır 
p. 387 | 1873 Corophium eylindricum, (S.1I. Smith in:) A. E. Verrill in: Rep. U.S. Fish 


Comm., v.1 p.370, 566 | 1888 C. c., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 104 | 
1893 ©. c., A. Della Valle in: F. Fl. Napel, v.20 p. 376. 


North-Atlantie (from New Jersey to Vineyard Sound). 

C. dentatum Fr. Müll. 1864 C.d., Fritz Müller, Für Darwin, p.5l | 1893 
C. d., A. Della Valle in: F. Fl. Neapel, v.20 p. 375. 

Brazil? 

C. quadriceps Dana 1852 C. q., J. D. Dana in: P. Amer. Ac., v2 p.219 | 
1853 & 55 C. ?q., J. D. Dana in: U, S. expl. Exp., v.13u p. 836; 1.55 f.8 | 1888 C. ?gq., 


T. Stebbing in: Rep. Voy. Challenger, v.29 p.255 | 1893 C. gq., A. Della Valle in: F. 
Fl. Neapel, v.20 p. 374. 


Probably a young form. L. ‚about 2 mm. 
Harbour of Rio Janeiro. 
C. salmonis Stimps. 1857 C©.s., Stimpson in: Boston J. nat. Hist., v.6 p.514 | 


1888 C. s., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 303 | 1893 C. s., A. Della Valle 
in: F. Fl. Neapel, v.20 p. 375. 


Puget Sound. 


= 


% C. spinicorne Stimps. 1857 €. s., Stimpson in: Boston J. nat. Hist., v. 6 p. 514 | 
1857 C. s., Stimpson in: P. Oalif. Ac., v.1 p.89 | 1893 ©. s., A. Della Valle in: F. Fl. 
Neapel, v.20 p. 375. 

L. 10 mm. 

San Francisco Bay. 


ir gi ae Be a 5 ee 


Cheluridae, Chelura 693 


39. Fam. Cheluridae 


1847 Cheluridae, G.J. Allman in: Ann. nat. Hist., v. 19 p. 361 | 1876 C., A. Boeck, 
Skand. Arkt. Amphip., v.2 p. 645 | 1888 C., T. Stebbing in: Rep. Voy. Challenger, v.29 
p.218 | 1894 C., G. O. Sars, Crust. Norway, v.1 p.626 | 1893 Cheluridi, A. Della Valle 
in: F. Fl. Neapel, v.20 p. 345. 


Pleon segments 4—6 coalesced. Side-plates small. Antenna 2 with 
blade-like flagellum. Mouth-parts on the whole normal. Pleopods with peduncle 
produced on the inner side. Uropods 2 and 3 abnormal (Fig. 119 p. 694). 

Marine. 

1 genus with 1 species. 


1. Gen. Chelura Phil. 


1839 Chelura (Sp. un.: ©. terebrans), A. Philippi in: Arch. Naturg., v.dı p. 120 | 
1876 C., A. Boeck, Skand. Arkt. Amphip., v.2 p.646 | 1888 C., T. Stebbing in: Rep. 
Voy. Challenger, v.29 p. 181, 217, 1670 | 1893 C., A. Della Valle in: F. Fl. Neapel, v.20 
p- 346 | 1894 C., G. O. Sars, Crust. Norway, v.1 p. 626 | 1847 Nemertes (nom. nud.), A. 
White, Crust. Brit. Mus., p. 90. 


Body (Fig. 119 p.694) broad, subdepressed, pleon segments 1 and 2 very 
short. Head without rostrum. Antenna 1 short, with accessory flagellum. An- 
tenna 2 longer and much gtouter. Mouth-parts prominent. Upper lip with the 
margin entire. Lower lip with inner lobes thin, adpressed. Mandible, molar 
strong; palp rather short, 3% joint about as long as 24. „Maxilla 1, inner plate 
narrow, tipped with 3 short setae, outer with 9 spines, palp long. Maxilla 2, 
inner plate having 2 setae on inner margin, of which the more distal is the 
longer. Maxillipeds, inner plates rather long, its apical spines slender, 
seemingly unaccompanied by spine-teeth. Gnathopod 1 the stronger. Peraeo- 
pods 3—5, 24 joint little expanded. Uropod 2 subdorsal in position, with 
greatly expanded pedunele and very short rami. Uropod 3, peduncle very 
short, inner ramus rudimentary, outer large and laminar. Telson entire. 
Only one pair of hepato-pancreatic coeca. 


1 species. 


1. C. terebrans Phil: 1839 C.t., A. Philippi in: Arch. Naturg., v.5ı p.120 
t.3 £.5 | 1847 ©. t., G. J. Allman in: Ann. nat. Hist., «.19 p.361 t.13, 14 | 1880 ©. t., 
S. I. Smith in: P. U. S. Mus., v.2 p.233 f. | 1888 C. t., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p. 1695 | 1893 C. t., A. Della Valle in: F. Fl. Neapel, v.20 p.347 t.6 
£.3; 1.7 £.1—22 | 1894 C. t, G. O. Sars, Crust. Norway, v.1 p. 627 t. 225 | 1847 
Nemertes nesaeoides (nom. nud.), A. White, Crust. Brit. Mus., p. 90 | 1863 Chelura 
terebans, Bate & Westwood, Brit. sess. Crust., v. 1 p. 508 f. | 1868 ©. pontica, Czerniavski 
in: Syezda Russ. Est., Syezda 1 Zool. p.95 t.7 f.1—18 | 1868 Limnoria zylophaga, 
E. Hesse in: Apn. Sei. nat., ser.5 v.10 p. 101. 

Back broadly vaulted, with setules rising from hind margin of the 
segments. Pleon segment 3 dorsally produced to a conical curved process 
much longer in 9 than in 9, with a short process on each side of it; the follo- 
wing segment (4 —6th in coalescence) is dorsally flat, reetangular, in J nearly 
half, in © about °/, as long as the rest of the body. Head, lateral lobes 
rounded, post-antennal corners well defined. Side-plates successively less 
deep, 1° rounded quadrate, 5!" and 6th bilobed. Pleon segment 3, postero- 
lateral corners quadrate. Eyes on lateral lobes of head, small, rounded, 
dark. Antenna 1 about '/, as long as body; flagellum rather setose, as 
long as 24 and 34 joints of peduncle combined, 6-jointed; accessory flagellum 
with 2 joints, 24 minute. Antenna 2 curving; ultimate joint of peduncle little 


694 Chelura, Podoceridae 


longer than penultimate or antepenultimate, like the flagellum densely setose; 
flagellum about 2',, as long as broad, consisting of 1 massive den tipped 
with 1 or 2 minute ones almost hidden in the setose clothing. 
chelate, small, 5tk joint shorter than 6%, which is oblong, a little curved, 
the short thumb not strongly produced, stouter than the small finger, which 
inelines towards it, giving almost a subchelate appearance. Gmathopod 2 
longer but more slender, 5t" joint nearly as long as the narrow, subfusiform 6th, 
which ends in a chela smaller but more definite than that of gnathopod 1. 
Peraeopods 1--5 not elongate; 24 joint slightly expanded, 4 distally 
widened, 5tt short, 6! distally 
narrowed ; finger short, curved; 
x  inperaeopods 3—5 the 24 and 
SAN th joints finged with long 
2 setae. Branchial vesielesrather 
large. Marsupial plates nar- 
row. Pleopods 1—3 have 
Fig. 119. C.terebrans, 3. Lateral view. ratherelongate coupling Ser 
[After @. O. Sars.] on expanded inner part of pe- 
; dunele; 1° joint of inner 
ramus with inner margin smooth. Uropod 1, peduncle more than twice as 
long as rami; inner ramus the broader, with 3 apieal spinules. Uropod 2 
attached elose to uropod 1; peduncle enormousiy expanded, the expansion 
in © long as well as broad and densely hirsute, in J broader than long, 
with serrate margin; in both sexes rami very short, laminar, apically serrate, 
Uropod 3, attached far from the others; pedunele short, inner ramus oval, 
minute, not visible from above; outer very large, in d very long, broad, 
spinulose, narrowing distally;, in © much shorter, but still large, broadly 
oval, with margin_serrate and spinulose. Telson subcarinate dorsally, about 
as broad as long, irregularly tapering to an acute point, furnished with a few 
setules. Colour light brown. L. 9 5, 9 6 mm. 
North-Atlantie with adjoining seas (Europe from Norway to the Black Sea; North 
America). In submerged or partially submerged or waterlogged timber. 


40. Fam. Podoceridae 

1849 Dulichidae, J. D. Dana in: Amer. J. Sei., ser. 2 ©.8 p.135, 140 | 1857 
Dyopedidae, Bate in: Ann. nat. Hist., ser.2 «19 p.150 | 1876 Dulichidae, A. Boeck, 
Skand. Arkt. Amphip., v.2 p.649 | 1888 Dulichiidae, T. Stebbing in: Rep. Voy. Challenger, 
0.29 p.1182 | 18938 Dulichidi, A. Della Valle in: F. Fl. Neapel, ©.20 p.314 | 1894 
Dulichiidae, &. ©. Sars, Crust. Norway, v.1 p.628. 

Pleon segment 4 elongate, 5tk and 6t# very short, one of them some- 
times missing. Side-plates small, shallow (Fig. 122, 126 p. 705,712). Antennael 
and 2 elongate, setose; the relative length varying; flagellum shorter than 
pedunele; aecessory flagellum present or absent. Upper lip slightly bilobed. 
Lower lip with inner lobes. Mouth-parts normal. Gnathopod 2 usually 
much larger than gnathopod 1 and much larger in Ö than in ©. Peraeo- 
pods 3—5 usually elongate, 24 joint not or little expanded. Pleopods 1—3 
(Fig. 120 p. 696), peduncle not expanded. Uropod 1 normal, of uropods 2 
and 3 one or other missing or rudimentary or abnormal. Telson entire 
(Fig. 121, 127, p. 696, 714). 

Marine. 

8 genera, 30 accepted species and 1 obseure. 


nathopod 1 


. 


a RN 2 


ER en RIES Se Be en a et 


Podoceridae, Laetmatophilus 695 


Synopsis of genera: 
Antenna 1 without accessory flagellum — 2. 
Antenna 1 (Fig. 122 p.705) with accessory 
flagellum — 4 
Pleon with only 5 distinet segments are, 
N Re ee Sr ae? 1, Gen. Laetmatophilus p. 695 
Pleon with 6 distinet segments preceding the 
telson — 3. 
Pleon segment 5 earıying uropods . =»: - . 2. Gen. Cyrtophium . . p:697 
Pleon segment 5 not earrying uropods . . . 3. Gen. Leipsuropus . . p. 698 


> | 
3 pairs of uropods (Fig: 125 p. 707) present — 5. 


2 


o 


4 ! Only 2 pairs of uropods (Fig. 127 p. 714) 

present — 7. 
Antenna 1 longer than antenna 2 ..... 4. Gen. Xenodice . . . p.699 
Antenna 1 shorter than antenna 2 (Fig. 122, 

123 p. 705, 707) — 6. 
Gnathopods 1 and 2 subehelate . ..... 5. Gen. Podocerüs . . . p.700 
Gnathopods 1 and 2 (Fig. 124 p.707) simple 6. Gen. Ieilius ... .. . p. 706 
Last pair of uropods normal . . .. .... 7. Gen. Dulichia. . . . p. 708 
Last pair of uropods (Fig. 127) rudimentary 8. Gen. Paradulichia . . p.713 


5 


fer) 


7 


1. Gen. Laetmatophilus Bruz. 


1859 Laetmatophilus (Sp. un.: L. tuberculatus), R. M. Bruzelius in: Svenska Ak. 

‘ Handl., n. ser. v.3 nr. 1 p.10 | 1886 L., Gerstaecker in: Bronn’s Kl. Ordn., v.5ır p.493 | 
1888 L., T. Stebbing in: Rep. Voy. Challenger, v.29 p.1197 | 1893 L., A. Della Valle 
in: F. Fl. Neapel, v.20 p.316 | 1894 L., G. O. Sars, Crust. Norway, v.1 p.629 | 1873 
Laetmophilus, A. Marschall, Nomenel. zool., p.411 | 1885 Laematophilus, Haswell in: 
P. Linn. Soe. N. S. Wales, ©. 10 p. 107, 110. 


Peraeon with marked constrietion between segments 1 and 2; segments 
behind constrietion much broader in O than ind‘. Pleon consisting of 5 segments, 
each carrying a single pair of legs; last 3 segments reflexed. Head with 
frontal process carrying antenna 1. Side-plates small, 24 largest in J, 34 
in 9. Antennae 1 and 2 strong, setose, with flagellum few-jointed; no 
accessory flagellum to antenna 1; antenna 2 the longer. Upper lip bilobed. 
Mandible with large palp; 34 joint setose, broad ended. Maxilla 1. inner 
plate small; palp 2-jointed. Maxillipeds, outer plates reaching much beyond 
the smaller inner plates; 4th jan of palp bluntly eonieal. Gnathopod 1 
much smaller than gnathopod 2 ‚ Stk and 6 joints subequal. Gnathopod 2, 
5th joint small, 6th broader in oO, "longer i in d; finger large. Peraeopods 1—5 
subequal; 24 joint not expanded, 6*h joint the longest; finger strong, curved. 
Branchial vesicles very small. Marsupial plates large and broad. Pleopods 1—3 
(Fig. 120 p. 696) feeble. Uropod 1 (Fig. 121 p. 696), inner ramus much 
longer than outer. Following uropod (probably uropod 3) consisting of a 
small simple plate. Telson simple, rounded. 


4 species. 


Synopsis of species: 


1 | Without dorsal tubereles . . : . .. 22.220. 1. L. purus . . .9P9.6% 
With dorsal tubereles — 2. 
$ Dozsal tabereles obtuse. . 2... ...r.: 0.8 2: L. tubereulatus p. 696 
\ Dorsal tubereles spiniform — 8. 
8 | Tubereles not more than 2 in transverse row. . . 3. L.armatus . . p.697 
Tubereles as many as 4 in transverse row . . . . 4. L.hystrix. . . p.697 


Bad: = en es 


696 Laetmatophilus 


1. L. purus Stebb. 1888 L.p., T. Stebbing in: Rep. Voy. Challenger, v. 29 
p.1198 t.132 | 1894 L.p., G. O. Sars, Crust. Norway, v.1 p.630 | 1893 L. tuberculatus 
(part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 317. 


Back appearing transversely corrugated; head and peraeon segments 1—5 
each having a dorsal depression; peraeon segment 3 with small ventra 
process; pleon segment 4 eylindrical, longest.of all segments. Eyes round, dark, 
on prominent lobes. Antenna 1, 1° joint of peduncle '/, as long as 34, 24 Jonger 
than 34, flagellum as long as 34, with 3 joints, 1° nearly thrice as long as 
24 and 3% combined. Antenna 2 stouter, ultimate joint of peduncle longer than 
penultimate, subequal to 1% and 24 of pedunele of antenna 1 combined; flagellum 
of 1 long joint with 1 or 2 microscopie apical joints. Gnathopod 1, 4% joint 
short, setose, 5 ovoid, strongly fringed with plumose setae or spines on 
hind margin, 6! widening almost 
abruptly at base, with very short hind 
margin, and long, oblique, slightly 
convex, crenate palm, fringed with 
plumose spines, and having a row of 
10 elose-set serrate spines leading to 
the defining angle; finger matching 
palm, distal half of inner margin with 
about 12 decurrent spine-teeth. Gnatho- 
pod 2 in C, 24 joint short, broad, 
the channelled front with projecting 
‚apices, 34, 4th and 5th joints very 
short, 4 joint with acute apex, 6th 
very long, a sort of oblong oval, 
having near the finger-hinge a broad 
lobe followed by a narrow blunt tooth; 
the long strong finger elosing over 
these, and leaving a narrow gap be- 
tween its smooth inner margin and 
on un that of the hand, on the surface of 
Pleopod 3. Breuer sad telson. which it applies its apex near the 
Fig. 190 & ı21. L. purus. base, the meeting of hind margin 
and palm being indefinite. Peraeo- 
pods 3—5, 24 joint a little longer than the 4b, shorter than the 5th, 
Pleopods 1—3 (Fig. 120), peduncle much shorter than rami, with 6 or 7 pairs 
of coupling spines; joints of rami 11—13, no cleft spines observed. Uropod 1 
(Fig. 121), pedunele as long as outer ramus, which is less than °/, as long 
as the broader inner ramus; both with spines on both margins. Terminal 
uropod narrowly oval, when turned obliquely inward covered by the almost 
eireular telson (Fig. 121). L. about 6 mm. 


Off Cape of Good Hope. 


SEEN 


PER 
7 


Uropod1, 
inner 
ramus 


2. L. tubereulatus Bruz. 1859 L.t., R. M. Bruzelius in: Svenska Ak. Handl., 
n.ser.v.d nr.1 p.11 t.1 f.1 | 1876 L.t., A. Boeck, Skand. Arkt. Amphip.. v.2 p. 663 
t.29 £.7 | 1877 L. t., Meinert in: Naturh. Tidsskr., ser. 3 v. 11 p. 166 | 1893 L. t. (part.), 
A.Della Vallein: F.Fl. Neapel, v.20 p.317 1.55 f.1—3 | 1894 L.t.(part.), G. O. Sars, Crust. 
Norway, v.1 p.630 t.226 | ?1898 L.t., Sowinski in: M&m. Soc. Kiew, v.15 p.451 t.8 f. 1—8. 


Head with small dorsal tuberele. Segments of peraeon transversely 
furrowed, 1° with 2 dorsal tubereles, one behind other, 24 with small 
tubercle in front of furrow; the remainder rugged in outline, scarcely tubereular. 


m IE EL he EEE u ee ee Ft 
: 


Laetmatophilus, Cyrtophium 697 


Eyes rounded, slightly protuberant, with light yellowish pigment. Antennae 1 
and 2 about as in L. purus. Antenna 1 about °/, as long as body. Gnatho- 
pod 1 as in L. purus, except 6!" joint gradually widening to the palm, 
which is not longer than hind margin, somewhat oblique, setose, defined by 
an obtuse angle, slightly overlapped by the apparently not denticulate 
finger. Gmathopod 2 in J as in L. purus, except that the tooth on the 
. 6 joint is more acute. Gnathopod 2 in O, apex of 4th joint more produced 
than in S; 6h joint broad, rounded oval; palm convex, defined by a short 
tooth; finger strong, curved, matching palm. 'Peraeopods 1—5 subequal, 
slender; 24 joint much longer than 4, subequal to 6%, which is longer 
than 5th; finger strong, curved. Pleopods (in Sars’ figure) with 9-jointed 
rami. Colour yellowish. L. 4—5 mm. 


Arctic Ocean, North-Atlantie, North-Sea, Skagerrak and Kattegat (Scandinavian 
eoasts). Depth 45—600 m. 


3. L. armatus (Norm.) 1869 COyrtophium armatum, A. M. Norman in: Rep. 
Brit. Ass., Meet. 38 p.285 | 1888 Laetmatophilus a., Chevreux & Guerne in: ©.-R. Ac. 
Sei., v. 106 p. 626 | 1888 L. a., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1628 | 1894 
L..a., 6. O. Sars, Crust. Norway, v.1 p.632 t.227 £.1 | 1895 L.a., A. M. Norman in: 
Ann. nat. Hist., ser.6 v.15 p.493 | 1871 L. spinosissimus, A. Boeck in: Forh. Selsk. 
Christian., 1870 p.266 | 1893 L. tuberculatus (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p. 8317. 


Head with dorsal tuberele acutely produced. Peraeon segment 1 
with 2 spiniform tubercles, one behind other, segment 2 with 1 median, followed 
by 2 side by side, segments 3—7 and pleon segments 1 and 2 each with 
a transverse pair. Appendages closely agreeing with those of L. tuberculatus. 
Colour light yellowish, transversely banded with vivid orange. L. scarcely 4 mm. 


Arctie Ocean, North-Atlantie and North-Sea (West-Norway to Lofoten Islands, 
depth 94—565 m; Shetland Isles, depth 180-200 m). 


4. L. hystrix (Hasw.) 1880 Cyrtophium? h., Haswell in: P. Linn. Soc. N.S. Wales, 
v.5 p.104 t.7 f.3 | 1885 Laematophilus h., Haswell in: P. Linn. Soc. N. S. Wales, v.10 
p-110 | 1893 Laetmatophilus tuberculatus (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.317. 


Head, peraeon segments 1—7 and pleon segments 1 and 2 armed 
with spiniform tubereles. Of these there is a median row, flanked on the 
peraeon and perhaps also on the head by 2 lateral rows on each side; 
lateral borders of peraeon segments 2—6 produced outward and upward, 
acuminate. Side-plates with an acute point on lower margin. Appendages 
appear in «lose agreement with L. purus, but in gnathopod 1 in S the 6! joint 
is without the long row of spines at defining angle of palm. Gnathopod 2 
in J not observed. Gmnathopod 2 in Q as in L. tuberculatus. Rami of 
pleopods with 6—8 joints. Uropod 1, outer ramus ?/, as long as inner. 
L. about 4 mm. - 

Port Jackson and Port Stephens [East-Australia]. 


2. Gen. Cyrtophium Dana 


1852 Cyrtophium, J. D. Dana in: Amer. J. Sei., ser.2 v.14 p.309 | 1853 C. (Sp. 
un.: (©. orientale), J. D. Dana in: U. S. expl. Exp., v. 1311 p.831, 839. 


Agreeing with Podocerus (p. 700) except that antenna 1 has no 
accessory flagellum, and the longer ramus in uropods 1 and 2 is broad 
comparatively. 


2 accepted species, 1 doubtful. 


698 Cyrtophium, Leipsuropus 


Synopsis of accepted species: 
Gnathopod 2 in d, palm and hind margin smoothly eontinuous 1. C. orientale.. . p. 698 


Gnathopod 2 in d, palm well defined, forming three strong 
teeth TIER hl ic BE Mae EN Bu A, IE ar Ze LE Ba Tat ER “er. . +. 0. 9, ©. minutum . pP: 698 


1. ©. orientale Dana 1853 & 55 (©. o., J. D. Dana in: U. S. expl. Exp., » 18u 
p. 840; 1.56 f. 1a—d | 1893 Platophium o. (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p.332. 

Body elliptical, dorsally eorrugated, not carinate. Antennae 1 and 2 
subpediform, subequal. Antenna 1, flagellum with 3 subequal joints, together 
subequal to 3% joint ofpedunele. Antenna 2, flagellum with 3 joints, the 1° long, 
stiliform, longer than ultimate joint of pedunele, the other 2 minute. Gnatho- 
pod 2, 6 joint stout, subelliptical, nearly straight below and hirsute; finger 
nearly as long as 6th joint. Peraeopod 5 (in figure) almost completely 
unarmed; 24 joint quite narrow. Uropods 1 and 2, apical spines of great 


length, numerous spines on inner margin of the broad longer ramus, the. 


other subterete. Telson (in figure) bluntly triangular. L. about 4 mm. 
Strait of Singapore. 


2. C. minutum Hasw. 1879 ©. m., Haswell in: P. Linn. Soe. N. S. Wales, ». 4 
p. 8348 t.22 f.6 | 1885 ©. m., Haswell in: P. Linn. Soc. N. S. Wales, v.10 p.109 t.18 
f. 1—5, 9 | 1888 C. m., T. Stebbing in: Rep. Voy. Challenger, v.29 p.1193 | 1893 Plato- 
phium m., A. Della Valle in: F. Fl. Neapel, 0.20 p. 334. 


Body corrugated, most strongly on pleon segments 1—3. Eyes prominent. 
Antennae 1 and 2 subequal. Antenna 1, fiagellum with 3 joints, the 1° longer 
than 24 and 34 combined, the 34 very small. Antenna 2, flagellum much 
shorter than ultimate joint of pedunele, with 2 joints, 1° long, stout, 24 minute, 
tipped with curved spine. Mandible, 34 joint of palp less dilated than in 
Podocerus (p. 700). Gmnathopod 1 as in Podocerus, except that the palm is 
less strongly distinguished from hind margin of 6" joint. Gnathopod 2 
in I, 4% joint distally produced to an acute point and very hirsute, 
5th rudely squared, not projecting, 6" with front margin smoothly eurved, 
not notched for spines; palm defined from short hind margin by long 
tooth, which the apex of finger reaches, arching over 2 others. Peraeo- 
pods 1—5 all nearly alike; 24 joint short and narrow, with a little projeetion 
at upper corner, 5t" Jonger than 4%, 6th than 5th; the spinules on the 
6% joint very unimportant in appearance. Pleopods 1—3 each with 4—6 
coupling spines. Uropods 1-3 and telson about as in ©. orientale. Colour 
pellueid with brown dots, and across the head a brown band. L. 2—3 mm. 


Port Jackson [East- Australia]. 


C.laeve Heller 1866 C©.1., Cam. Heller in: Denk, Ak. Wien, #261 p.49 t.4 


f.9—12 | 1893 Platophium brasiliense (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.329. 
Adriatie (Lesina). 


3. Gen. Leipsuropus Stebb. 


1899 Leipsuropus (Sp. un.: Oyrtophium parasiticum), T. Stebbing iv: Ann. nat 


Hist., ser. 7 v.3 p. 241. 


Like Cyrtophium (p. 697), but pleön segment 5, though present, devoid 
of legs. 


1 species. 


Leipsuropüus, Xenodice 699 


1. L. parasiticus (Hasw.) 1879 Oyrtophium parasitieum, Haswell in: P. Linn. 
Soe. N. S. Wales, v.4 p.274 t.12 f.1| 1885 C, p., Haswell in: P. Linn. Soe. N. S. Wales, 
v.10 p. 107 £.17 £. 1—7 | 1893 Platophium p. (part.), A. Della Valle in: F. Fl. Neapel, 
v.20 p.335 ! 1899 Cyrtophium p., Leipsuropus, T. Stebbing in: Ann. nat. Hist., ser. 7 
v.3 p. 241. 

Body without medio-dorsal. processes, laterally tuberculate, peraeon 
dorsally ovate, widest at 4!" segment, division between segments 6 and 7 
dorsally obseure, pleon segment 5 very short. Side-plates squared, with 
rounded corner, 4% widest, slightly emarginate below. Eyes round, rather 
prominent. Antenna 1 elongate, slender, 1° joint scarcely half as long as 24, 
34 a little shorter than 24; flagellum as long as 24 joint of peduncle, with 
4 joints, 1° rather longer than the other 3, 34 longer than 24. Antenna 2 
longer and much stouter; ultimate joint of peduncle rather longer than 
penultimate; flagellum as long as penultimate joint of pedunele, 1 long 
stout joint with a minute terminal (Haswell: flagellum with traces of division 
into 9 joints). Gmnathopod 1, 24 joint shorter than 5, 34 —-6th getose on 
hind margin, 5" broad except at base, 6!" rather shorter and narrower than 5th, 
oval, hind margin extremely short, forming an angle with the long, convex, 
oblique palm ; finger long and strong, not quite reaching end ofpalm. Gnathopod 2 
in d, 24 joint much shorter than 6%, 3d—5th very small, 6! powerful, 
elongate, narrowest at base, front margin convex, hind nearly straight but 
with a shallow emargination, variable in position, much or little or not at 
all overlapped by the strong and long, smooth finger; one of the points of 
the emargination much or little projeeting, and perhaps to be regarded as 
defining the palm from the straight hind margin. Gmnathopod 2 in Q (in figure), 
6% joint widening greatly to a nearly transverse, slightly sinuous, well defined 
palm, matched by the finger. Peraeopods 1—5 of uniform structure, very 
slightly armed; 24 joint short, not expanded, 4*k joint very short, Stk stout, 
longer than the 24, rather shorter than the 6"; finger curved, acute. Pieo- 
pods 1—3, peduncle of pleöpod 1 with rectangular inner corners, peduncles 
of 24 and 34 successively shorter, inner corners rounded, so that the inner 
rami are not contiguous to one another; coupling spines 4 pairs; rami 7- or 
8-jointed. Uropod 1 slender; pedunele slightly overlapping telson; outer ramus 
slightly longer than pedunele, nearly °/, as long as inner, with spinules on 
outer margin, inner with spinules on both margins. Uropod 3, the narrowly 
oval plates not reaching end of the obtusely pointed ovate telson. L. 4—5 mm. 

Port Jackson [East-Australia]. 


4. Gen. Xenodice Boeck 


1871 Xenodice (Sp. un.: X. frauenfeldti), A. Boeck in: Forh. Selsk. Christian., 
1870 p.266 | 1876 X., A. Boeck, Skand. Arkt. Amphip., 0.2 p.665 | 1888 X, T. Stebbing 
in: Rep. Voy. Challenger, #.29 p.402|1893 X., A. Della Valle in: F. Fl. Neapel, v.20 
p. 318 | 1894 X., G.O.Sars, Crust. Norway, v.1l p.632|1895 Zenodice, A. M. Norman 
in: Ann. nat. Hist., ser.6 ®»15 p. 49. 

Body slender. Pleon segment 4 much longer than 5!" and 6, Head 
produced over base of antenna 2. Side-plates small, subequal. Antennae 1 
and 2 elongate; flagellum many-jointed; antenna 1 the longer, with accessory 
flagellum. Upper lip faintly bilobed. Mandibular palp large; 3° joint setose, 
broad-ended. Maxilla 1, inner plate fringed with 7 or 8 setae. Maxilla 2, 
inner plate with long row of setae fringing inner margin. Maxillipeds, outer 
plates reaching much beyond small inner plates. Gmathopods 1 and 2 not 
very unequal, not much stronger in J than in 9. Peraeopods 1—5 very 


700 Xenodice, Podocerus 


slender and long; 2% joint the longest, linear. Peraeopods 3—5 successively 


longer. Branchial vesicles very small. Pleopods well developed. Uropods 1 
and 2 normal. Uropod 3 rudimentary, not reaching end of squamiform telson. 


1 species. 


1. X. frauenfeldti Boeck 1871 X. f., A. Boeck in: Forh. Selsk. Christian., 
1870 p. 267 | 1876 X. f., A. Boeck, Skand. Arkt. Amphip., v.2 p. 666 | 1893 X. f., 
A. Della Valle in: F. Fl. Neapel, v.20 p.319 | 1894 X. f., G. O. Sars, Crust. Norway, vl 
p-633 1.227 f.2 | 1895 Zenodice f., A. M. Norman in: Ann. nat. Hist., ser.6 v.15 p.49. 


Body long, nearly cylindrie, smooth; pleon segment 4 produced latero- 
dorsally into 2 microscopie teeth. Head long, front truncate. Side-plates sub- 
quadrate. Pleon segment 3, postero-lateral corners quadrate. Eyes represented 
by 2 patches of whitish pigment. Antenna 1 nearly as long as body, 1° joint of 
peduncle about half as long as 24 or 34, flagellum rather shorter than 24 and 
34 combined, about 12-jointed; accessory flagellum 4- or 5-jointed. Antenna 2 
rather shorter, ultimate and penultimate joints of peduncle subequal; flagellum 
more than half as long as peduncle, 9-jointed. Gnathopods 1 and 2 setose. 
Gnathopod 1 in JS, 5!" joint longer and wider than the oval, distally narrowed 
6'h; palm oblique, defined by a palmar spine, slightly overlapped by the 
finger. Gnathopod 2 in J, 5th joint as long as 6%, which is widest where 
the straight, very oblique palm is defined by a strong tooth. Gmathopod 1 
in © more slender than in J, but similar. Gnathopod 2 in Q like gnatho- 
pod 1, but rather stouter; marsupial plates long and narrow. Peraeopods 1 
and 2 nearly twice as long as the gnathopods; peraeopods 3—5 still longer. 
-Uropod 1 longer than uropod 2, the rami slender in both, outer rather the 
shorter. Uropod 3, the small single joint scarcely reaching end of the obtusely 
pointed telson. Colour greyish white, transversely banded with faint orange. 
L. 8—14 mm. 

Arctie Ocean, North-Atlantie and North-Sea (Trondhjemsfjord, Lofoten Islands, 
Rödberg, Hardangerfjord). Depth 150—565 m, 


5. Gen. Podocerus Leach 


1813/14 Podocerus (Sp. un.: P. variegatus). Leach in: Edinb. Enc., v.7 p.433 | 
1899 P., T. Stebbing in: Ann. nat. Hist., ser.7 v.3 p.237 | 1852 Platophium, J. D. Dana 
in: Amer. J. Sei., ser.2 v.14 p.309 | 1853 P. (Sp. un.: P. brasiliense), J. D. Dana in: U.S. 
expl. Exp., v.13u p.831, 837 | 1888 P., T. Stebbing in: Rep. Voy. Challenger, v. 29 
p-.257,1184 | 1893 P. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.327 | 1894 P. 
(part.), G. O. Sars, Crust. Norway, v.1 p. 629, 630 | 1885 Dexiocerella, Haswell in: P. 
Linn. Soe. N. S. Wales, v. 10 p. 107. 


Pleon narrow, ventrally flexed; its 4 segment elongate, 5tt and 6th 
very short. Head quadrate. Side-plates 1—7 small, shallow. Pleon segment 3, 
postero-lateral corners distally rounded. Eyes prominent,‘ placed at front 
corners of the head (Fig. 122 p.705). Antenna 1 shorter than antenna 2, 


fringed below with long setae; flagellum much shorter than peduncle; 


accessory flagellum usually 1-jointed, always small. Antenna 2 longer in 
Ö than in 9; flagellum much shorter than peduncle, few-jointed. Upper lip 


slightly bilobed. Lower lip, inner lobes well developed. Mandible normal, with 


spine-row of 2 or 3 spines; palp much longer than trunk, 39 joint short, 
distally widened and fringed with many spines. Maxilla 1, inner plate 
obsolete, outer with 9 spines on the distal margin, palp with a few spine- 
teeth on apex of the long 2 joint. Maxilla 2, inner plate the shorter, 


Podocerus 701 


 spines almost confined to distal margin. Maxillipeds normal, 4 joint of 
palp short, not unguiform, tipped with spines. Gmathopods 1 and 2 sub- 
chelate; gnathopod 1 much the smaller. Gnathopod 2, 5t joint small, in C 
sometimes coaleseing with the large 6t% joint, which is usually more elongate 
than in the ©, in both sexes having the front margin notched for spines. 
Peraeopods 1—5, 24 joint never very large; finger strong and curved. 
Branchial vesieles tending to develop extra lobes or become twisted. Marsupial 
plates of great size. Uropods 1 and 2, peduncle and rami spinose; one 
ramus decidedly shorter than the other; 1. spine in the apical group very 
long. Uropod 3, a small hollow plate facing the telson’s lateral margin. 
Telson entire, with a process on the upper surface carrying spinules. 


10 species. 


Synopsis of species: 


1 f Body not carinate — 2. 
\ Body more or less carinate — 9. 
Peraeopods 1 and 2, 2d joint expanded . . . 1. P.cheloniae.. . . . p. 701 
| Peraeopods 1 and 2, 2d joint not conspieuously 
expanded — 3, 
=, Antenna 1, accessory flagellum 4(?)-jointed . 2. P. andamanensis. . p.702 
2 Antenna 1, accessory flagellum 1(?)-jointed —- 4. 
Gnathopod 1 in 2, palm shorter than hind 
mern OE GB Toink. 2 2... 3. P. inconspicuus . . p. 702 
Gnathopod l in 2, palm longer than Gene 
- margin of 6th joint — 5. 
Gnathopod 2 in d, palm with strong teeth — 6. 
Gnathopod 2 in 3, palm without strong teeth — 8. 


i | 
| Gnathopod 2 ind, palm defined by a strong 


5 


Ve 2: Pe lobatus ... ::.% p- 703 
Gnathopod 2 in d, palm not defined by a 
strong tooth — 7. 


= Antenna 2 inä.not very elongate ..... 5. P. chelonophilus . p.703 
Antenna 2 ind very elongate ....... 6. P. variegatus . . . p. 703 
Peraeopods 1—5, sth joint with stout spines 
8 on lower half of inner margin... .. . 7. P. brasiliensis . . . p. 704 
Peraeopods 1—5, 6th joint with stout spines 
on upper half of inner margin. .... . 8. P-Jaevis, 4,00% p- 704 
Carinate processes from head to pleon segment3. 9. P.danae. . .. . . p- 705 

9 2 Carinate processes from peraeon segment 6 to 
pleop segment 2% = .» - » ir. 10. P. eristatus . . . . p. 706 


1. P. cheloniae (Stebb.) 1888 Platophium c., ®. Stebbing in: Rep. Voy. 
Challenger, v.29 p.1190 t.130 | 1893 P. chelonophilum (part.), Chevreux & Guerne in: 
Bull. Soe. ent. France, p. 118 | 1899 Podocerus chelonophilus (part.), T. Stebbing in: 
Ann. nat. Hist., ser.7 v.3 p.239 | 1893 Platophium brasiliense (part.), A. Della Valle 
in: F. Fl. Neapel, v.20 p. 329. 


Body elliptical, smooth. Eyes round. Antenna 1 short; .flagellum as 
long as 24, longer than 34 joint of peduncle, 4-jointed; accessory flagellum 
1-jointed. Antenna 2 rather longer, robust; flagellum °?/, as long as ultimate 
joint of peduncle, 3-jointed. Gnathopod 1, 5tk joint about as long and 
broad as the oval 6"; palm and hind margin scarcely distinguished, both 
spinose; finger with 2 teeth on inner margin. Gnathopod 2, 4" joint bluntly 
produced, masking the small 5", 6th Jarge, broadly oval, palm convex, 


702 Podocerus 


slightly distinguished from the hind margin by a minute tooth or notch, 
with 2 palmar spines; finger matehing palm. Peraeopods 1 and 2, 24 joint 
with convex front margin forming a winged expansion. Peraeopods 3—5, 
29 joint expanded behind in peraeopod 3 just as in front of the 1% and 24, 
in 4 and 5tk with more flattened hind margin. Pleopods 1—3, coupling 
spines reaching 9. Telson rather broader than long, distally rounded ; projeetion 


from upper surface broad, earrying 2 spines. Colour, dark stellate marking 


or round spots, scattered or erowded. L. 6—7 mm. 
Atlantie. On Chelonia imbricata (L.). 


2, P.andamanensis (Giles) 1890 Cyrtophium andamanense,. G. M. Giles in: 
J. Asiat. Soc. Bengal, v.59 p.72 t.2 f.7 | 1899 Podocerus andamanensis, T. Stebbing 
in: Ann. nat. Hist., ser. 7 v.3 p.239 | 1893 Platophium orientale (part.), A. Della Valle 
in: F. Fl. Neapel, v.20 p. 89. 


Body slightly corrugated, not carinate; peraeon segment 5 much 
shorter than the 1°, 24 or 7th, Eyes small. Antenna 1, 24 joint considerably 
longer than 1° or 34, or than the 4-jointed flagellum; accessory flagellum 
minute, with 4 short joints (?). Antenna 2 much longer and stouter; ultimate 
joint of peduncle subequal to penultimate (in figure longer), flagellum very 
short, with 2 stout long joints, armed with strong hooked spines. Gnatho- 
pod 1 very small; the articulation between 3% and 4" joints very oblique; 
finger probably fused with 6" joint, the subchela being formed between 
these and the dilated 5! joint. Gmathopod 2 very much larger; 4 joint 
not produced (figure), 5t" coalesced with the long oval or fusiform 6, 
which is devoid of long setae; finger strongly curved, little more than half, 
as long as 6th joint. Peraeopod 3 as long as peraeopods 1 and 2, but 


stouter; peraeopods 4 and 5 successiwely longer. Pleopods L—3 exceptionally - 


small. Uropod 1, peduncle as long as the longer ramus; the shorter ramus 
scarcely more than half as long. Uropod 2 shorter but stouter, its rami in 
like manner unequal and spinose. Uropod 3 reduced to a rudimentary 
tuberele. Telson small and laminar, armed with a few short, stiff hairs. 
Colour dirty white, sparely sprinkled with minute dark brown spots. L. 3 mm. 


Bay of Bengal (Andaman Islands). Taken in the surface net. 


3. P. ineonspicuus (Stebb.) 1888 Platophium inconspiceuum, T. Stebbing in: 
Rep. Voy. Challenger, v.29 p.1194 t.131 | 1899 Podocerus inconspicuus, T. Stebbing 
in: Ann. nat. Hist., ser. 7 v.8 p.239 | 1893 Platophium parasiticum (part.), A. Della 
Valle in: F. Fl. Neapel, v.20 p. 335. 


Q. Body elliptical, slightly imbricated. Eyes broadly oval, large. 


Antennae 1 and 2 imperfect. Gmathopod 1, 5! joint elongate, narrowing 
distally, rather longer than 6tt, 6!" widening to the palm, which is shorter than 
the hind margin and forms an obtuse angle with it, earrying’a palmar spine; the 
finger not overlapping palm, with a row of setules near the apex. Gnathopod 2, 
5th joint small, 6% large, abruptiy wider than 5%, hind margin very short, 
palm very long, oblique, defined by a small apical tooth, serrulate near 
finger-hinge, and then fringed with stout spines; finger stout, matching 
palm. Marsupial plates of great size. Peraeopods 1—5 unknown. Pleo- 
pods 1—3 each with 2 coupling spines. Uropod 3 not reaching end of telson. 
Telson distally rounded, with 2 spines rising from the surface at about the centre. 
Colour, dark pigment flakes, remaining dark in spirit. L. about 3 (not 6) mm. — 
S unknown. 


Port Jackson [East-Australia]. Depth 3—18 m. 


Se 
Ey 
< Da FE 
4 Zune w 
a Zu ist ie ee 


Podoeerus _ 708 


4. P. lobatus (Hasw.) 1885 Dexiocerella lobata, Haswell in: P, Linn, Soe, 
N.S. Wales, 0.10 p.110 t.18 f,6—8 | 1888 COyrtophium lobatum, Chevreux & Guerne 
in: C.-R. Ac. Sei., v.106 p.627 | 1888 Platophium I., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1184 | 1899 ‚Podocerus lobatus, T. Stebbing in: Ann. nat. Hist., ser.7 v.3 p. 239 | 
1893 Platophium orientale (part.), A. Della Valle in: F, Fi. Neapel, v.20 p. 338. 


Segments 1—4 elevated in the medio-dorsal line. Antenna 1, 34 joint 
of pedunele rather shorter (in figure rather longer) than 24; flagellum a 
little longer than 39 joint of pedunele, 5 (in figure 6)-jointed; accessory 
flagellum 1-jointed. Antenna 2 as long as the body, stout; penultimate 
joint of peduncle narrow at; base, then broad, ultimate considerably longer, 
flagellum about half as long as ultimate joint of peduncle, with 3 joints, 
1° much longer than 24 and 34 combined. Gmnathopod 1 as in Cyrtophium 
minutum (p. 698). Gnathopod 2 very large, 4 joint with apex of hind margin 
acutely produced, 6® large, irregularly ovoid, not twice as long as the greatest 
breadth, hind margin very short, palm defined by a strong tooth, and having near 
the finger-hinge a denticulated lobe, followed by a conical tootb, as in 
various other species. Peraeopods 1—5 unknown. Uropods 1—3 and 
telson as in P. eristatus (p. 706). L. about 4 mm. 


South-Paeifie (Broughton Islands near Port Stephens [East-Australia]). 


5. P. chelonophilus (Cheyreux & Guerne) 1888 Oyrtophium chelonophilum, 
Chevreux & Guerne in: ©.-R. Ace. Sei., v.106 p. 626 | 1893 Platophium e. (part.), Chev- 
reux & Guerne in: Bull. Soc. ent. France, p. 118 | 1899 Podocerus chelonophilus (part.), 
T. Stebbing in: Ann. nat. Hist., ser.7 v.3 p.239 | 1893 Platophium brasiliense (part.), 
A. Della Valle in: F, Fl. Neapel, v.20 p. 329. 


Body elliptical, dorsally smooth, not atall imbricated. Head reetangular, 
much broader than long. Eyes round, prominent, Antenna 1 very short, 
?/, as long as antenna 2; flagellum not longer than 34 joint of peduncle, 
6-jointed; accessory flagellum l-jointed. Antenna 2 very robust; flagellum 
searcely half as long as ultimate joint of pedunele, 3-jointed. Gnathopod 1 
in d, 6 joint triangular, hind margin almost at right angles with palm. 
Gnathopod 2 in G, 6!" joint very large, oval, having on the hind margin (which 
is undistinguished from the palm) a sharp tooth followed by 2 great dentieulate 
tubereles; finger stout, strongly curved, shorter than hind margin. Gnathopodl 
in © as in Cd, but smaller. Gnathopod 2 in Q, 6% joint short, rounded, as 
broad as long, hind margin smooth; finger slender, regularly eurved. Peraeo- 
pods 3—5 large, robust, suecessively longer; 24 joint short, oval, searcely 
expanded behind. Telson squamiform, a little broader than long. L. Q 7 


-© 9 mm, 


North-Atlantie (Azores). On Thalassochelys caretta (L.). 


6. P. variegatus Leach 1813/14 P. v., Leach mn: Edinb. Ene., v. 7 p. 433 | 
?1836--40 P.v., H. Milne Edwards in: G. Cuvier, Regne an., ed.3 Urust. p. 179 t. 61 
f.4 | 1899 P.v., T. Stebbing in: Ann. nat. Hist., ser.7 v.3 p.237, 350 | 1857 Cyrto- 
phium darwinii, Bate in: Ann. nat. Hist., ser.2 v.19 p. 148 | 1862 C. d., Bate, Cat. 
Amphip. Brit. Mus., p.274 t.46 f.8 | 1874 C.d., T. Stebbing in: Rep. Devonsh. Ass., 
v.6 p.770 | 1888 Platophium d., T. Stebbing in: Rep. Voy. Challenger, v.29 p.292 | 1893 
P. brasiliense (part.), A. Della Valle in: F. Fl. Neapel, 0.20 p.829 t.2 f.7; t.7 £.39—58 | 
1894 Laetmatophilus tuberculatus (part.), G. O. Sars, Crust. Norway, v.1 p. 630. 


Near to P. brasiliensis (p. 704), but body more strongly eorrugated or 
imbricated, and more broadly elliptical in 9. Antenna 1, 24 joint very 
little longer than 34; flagellum with 6 joints earrying numerous hyaline filaments 
in S, with 4 jointsin 9; accessory flagellum 1-jointed.. Antenna 2 large in J; 


704 Podocerus 


ultimate joint of peduncle very elongate; flagellum with 4 joints, the 1% much 
the longest. Gmathopod 1 as in P. brasiliensis, but in both sexes less robust. 
Gnathopod 2 in J, 6#k joint with the front margin more convex than in 
P. brasiliensis, and the opposite margin armed near the finger-hinge with a 
broad denticulate process, followed by a strong tooth; the plumose setae as 
in the species compared; finger reaching nearly to the base of the 6*% joint. 
Gnathopod 2 in Q, 4 joint with a broader apex, 6th rather less broad, 
finger longer than in P. brasiliensis. Pleopods with 5 coupling spines. Colour 
dark red, not rarely with a brilliant patch of purple or lilae on the back. 
L. 3—4 mm. 


North-Atlantie (South-West-England, West-France); Mediterranean (Naples, 
Adriatie). 


7. P. brasiliensis (Dana) 1853 & 55 Platophium brasiliense, J.D. Dana in: 
U.S. expl. Exp., v.13u p.838; t.55 f.9a—l | 1888 P. b., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.265 | 1893 P. b. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.329 | 
1899 Podocerus brasiliensis, T. Stebbing in: Ann. nat. Hist., ser. 7 v.3 p. 239. 


Body not carinate, in JS narrowly, in © more broadly, elliptical. 
Antenna 1, flagellum with 4 (Dana: 3—5) joints, together about as long as 
24 joint of peduncle. Antenna 2, ultimate joint of pedunele very long; 
flagellum with 4 joints, each with curved spine at apex, 4tk joint very small, 
its eurved spine the strongest. Gmnathopod 1 stronger in J than in O; 5tk joint 
shorter than 6'" in JG, not in Q, in each forming a broad lobe at middle 
of hind margin, 6! with very short hind margin, abruptly widening to the 
long sloping palm; 4!k—6th joints armed with numerous spines on and 
about the hind margin, 6 with several rows on surface adjoining front; 
finger matching palm, curved, serrate. Gmathopod 2 in Cd, 4" joint scarcely 
at all produced at distal hind corner, 5" small, scarcely distinet from 6th, 
6th very long (not short), narrowly oblong oval, fringed along the straight 
hinder edge, which is palm and hind margin all in one, with very long 
plumose hairs; the erenulation near the finger-hinge almost obsolete; finger 
more than half as long as 6% joint. Gnathopod 2 in ©, 4% joint considerably 
produced at the hinder apex, 5" small, triangular, but quite distinet, 6" not 
very long, broadly oval, the palm defined from the short hind margin by 
2 slender prominent spines, the joint armed with numerous seta-like spines 
but no plumose setae. Peraeopods 1—5, 6!" joint spinose on both margins, 
- on the front the strong spines being on the lower half; finger eurved, strong. 
Peraeopods 3—5, 24 joint narrow, and narrowing distally. Pleopods 1—3 
with only 2 coupling spines. Uropod 3, ramus very small. Telson with 

8 spines radiating round the projeceting distal margin. L. 6 mm. 


Tropieal Atlantic (Rio Janeiro, Antigua). 


8. P.laevis (Hasw.) 1885 Dexiocerella l., Haswell in: P. Linn. Soc. N. S. Wales, 
v.10 p.111 t.18 f.10—12 | 1888 Platophium laeve, T. Stebbing in: Rep. Voy. Challenger, 
v.29 p. 1184 | 1899 Podocerus laevis, T. Stebbing in: Ann. nat. Hist., ser. 7 v.3 p.239| 
1888 Oyrtophium haswelli, Chevreux & Guerne in: Ü©.-R. Ac. Sei., v.106 p.627 | 1893 
Platophium parasiticum (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 335. 


Body smooth, elliptical inQ. Antenna 1, 34 joint of peduncle very 
little shorter than 24; flagellum 5- or 6-jointed; accessory flagellum very 
small, 1-jointed. Antenna 2 nearly as long as body in d, ing much 
shorter; pedunele very stout, ultimate joint as long as 2 preceding joints 
together (in J, not so long in Q); flagellum "/, as long as ultimate joint of 
peduncle, with 3 indistinet joints (Haswell), in @ more than half as long as 


Podocerus 705 


ultimate joint of peduncle, with a minute 4% joint. Mandible, 34 joint of . 
palp very broad-ended. Gnathopod 1, 5t" joint with the hind lobe very broad, 
6th in S, but not in Q, rather longer than 5*", hind margin very short, at 
a deeided angle with palm, which is not defined by a tooth; finger as 
usual dentieulate; front margin of 6! joint more strongly spined in © than 
in d. Gnathopod 2 in G, 4th joint produced at apex of hind margin in- 
to a short tooth; 5tk joint obscurely separated from the large oval 6, of 
which the palm is serrulate towards finger-hinge and indistinetly defined 
from the short hind margin by a small notch and spine, which is scarcely 
reached by apex of finger, the fringing setae not very long. Gnathopod 2 
in Q, 4 joint with tip truncate, 6tk more broadly oval than in JS; palm 
more convex, not serrulate, defined by a little tooth and strong group of 
spines. Peraeopods 1—5 stout, with strong, eurved finger; inner margin 
of 6tk joint having the strong spines on the upper half. Peraeopods 1 and 2, 
24 joint with very inconspicuous dilatation. Peraeopods 3—5, 24 joint well 
expanded. Pleopods 1—3 each with 2 coupling spines. Uropods 1 and 2, rami 
‚rather less elongate than usual. Uropod 3, the plate not reaching end of 
telson. Telson, the upper process conical, rather strongly produced, tipped 
with 2 spinules. L. 8 mm, or less. 
Port Molle, among sea-weed, and Maroubra Bay [East-Australia]. 


9. P. danae (Stebb.) 1888 Platophium d., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.1185 t.128, 129 | 1899 Podocerus d., T. Stebbing in: Ann. nat. Hist., ser. 7 v.3 
.p.239 | 1893 Platophium orientale (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.332 
t.55 £. 17, 18. 


In the medio-dorsal line from head to 34 pleon segment extends a 
series of carinate teeth or processes, 2 small ones on peraeon segment 1, 


Te — a 


2 a 7% 5A ER 
Ä/ 4 Kr 
IN, \ x = 


l S 
> 


y | | 


2 V 


Fig. 122. P.danae. Lateral view. 


thence tending to encrease successively, 1 to each segment; lateral margins 

of peraeon projecting, on segments 3—6 tridentate; peraeon segment 7 and 

. pleon segments 1 and 2 each with lateral tooth on hind margin. Head 
Das Tierreich. 21.Lief.: T.R.R. Stebbing, Amphipoda I. 45 


706 Podocerus, Ieilius 


truncate in front (Fig. 122 p. 705). Eyes very prominent. Antenna 1, flagellum 
with 8—10 joints earrying many hyaline filaments, together longer than 24 joint 
of pedunele; accessory flagellum 1-jointed. Antenna 2, ultimate joimt of 
pedunele very long; flagellum slender, with 4 joints, the 1% much longer 
than the other 3 united, all 4 together subequal to penultimate joint of pedunele. 
Gnathopod 1 slight, 5tP joint fully as long as 6t%, general structure as in 
P. brasiliensis (p. 704). Gnathopod 2 in 9, 4tk joint slightly but bluntly 
produced, 5tk distinet, triangular, short, 6% thrice as long as 5tk, or as its 
own breadth, with no distinetion between hind margin and palm, the two 
closely fringed with rather long plumose setae, and broken into 2 or 3 teeth 
near the hinge of the setuliferous finger, which is about half as long as 
6! joint, eurved and stout. Gnathopod 2 in Q, 4% joint little and not 
acutely produced, 6% broadly oval, palm defined from the short hind margin 
by an acute tooth and strong palmar spine, against which the broad curved 
finger impinges. Peraeopods 1—5 nearly as in P. brasiliensis, but the finger 
fringed with a few setules on the convex margin. Pleopods 1—3 each with 
2 eoupling spines. Uropod 3, the concave plate bordered with 6 or 7 spinules. 
Telson with bluntly eonieal projection from its upper surface not quite reaching 
its distal margin; apex of the cone tipped with 2 spines. L. about 14 mm. 


Southern Indian Ocean (Kerguelen Island). Depth 232 m. 


10. P. eristatus (6. M. Thoms.) 1879 Oyrtophium eristatum, &. M. Thomson 
in: Ann. nat. Hist., ser.5 v.4 p.331 t.16 £.9—15 | 1881 ©. c., G. M. Thomson in: Tr. 
N. Zealand Inst., v.13 p.219 t,8 f.8 | 1888 Platophium e., T. Stebbing in: Rep. Voy. 
Challenger, v.29 p.500 | 1899 Podocerus eristatus, T. Stebbing in: Ann. nat. Hist., ser. 7 
v.3 p.239 | 1879 Cyrtophium dentatum, Haswell in: P. Linn. Soc. N.S.Wales, v.4 p.342 
t.22 £.5 | 1885 .Dewiocerella dentata, Haswell in: P. Linn. Soc. N.S.Wales, v.10 p.109 t.17 
f.8—12 | 1893 Platophium orientale (part.), A. Della Valle in: F. Fl. Neapel, v.20 p.332 


In elose general resemblance to P. variegatus and P. brasiliensis (p. 703, 
704). Peraeon segments 6 and 7 and pleon segments 1 and 2 each with carinate 
process in medio-dorsal line. Antenna 1, flagellum 6—8-jointed, accessory 
‚Nagellum 1-jointed (Haswell 1879: biartieulate, and 1885: consisting of several 
coalescent joints). Antenna 2, flagellum with 3 joints, the last tipped with 
a strong spine. Gnathopod 2 in JS, 4% joint with apex of hind margin 
acutely produced, 6% having near the finger-hinge a denticulate lobe followed 
by aconicaltooth, which like the lobe is of variable size; finger nearly reaching base 
of 6 joint. Peraeopods 3—5 with 29 joint slightly broader than in the 
other species. Pleopods 1—3 each with 2 coupling spines. Telson eonical, tipped 
at the apex with 2 spinules in juxtaposition. Colour grey or red. L.5—6 mm. 


Southern Indian Ocean and South-Paeifie (Dunedin Harbour [New Zealand], 
depth 7—9 m; eastern and southern Australia). 


6. Gen. Icilius Dana 


1849 Ieilius, J. D. Dana in: Amer. J. Sei., ser.2 ©.8 p.140 | 1852 I. (Sp. un.: 
T. ovalis), J. D. Dana in: P. Amer. Ac., v.2 p.220 | 1886 J., Gerstaecker in: Bronn’s 
Kl. Ordn., v.511 p.497 | 1888 7., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1202 | 
1893 I., A. Della Valle in: F. Fl. Neapel, 0.20 p. 327, 344. 


Body (Fig. 123) depressed, wide at the middle; pleon segments 3—6 
folded ventrally. Head with lateral lobes very prominent. Side-plates of 
various shapes, 1° and 24 the smallest, 4 and 5tk the largest, none very 
deep. Antenna 1 much the shorter; accessory flagellum very small. An- 
tenna 2, pedunele and flagellum elongate. Upper lip faintly emarginate. 


1 
Zr ea 
2 


‚neath which there is a 
‚spiniform process. Side- 


‚and 2, postero-lateral cor- 


leilius 707 


Lower lip, mandibular processes short, obtuse. Mandible normal; 39 joint of 
palp not longer than 24, Maxilla 1, inner plate with 2—4 setae on narrow 
apex, outer with 11 spines; 24 joint of palp with numerous spines and spine- 
teeth. Maxilla 2, inner plate the shorter, inner margin only partially fringed; 
both plates broad, rather short. Maxillipeds, inner plates broad, outer not 
very large, fringing spines slender; 24 joint of palp broad, finger slender. 
Gmathopods 1 and 2 (Fig. 124) simple, slender; 5! and 6! joints elongate, 
fringed with long setae. Peraeopods 1—5, 24 joint not widely expanded; 
peraeopod 5 longest. Branchial vesieles simple. Marsupial plates long and 
broad. Uropod 3, inner ramus longer than pedunele (Fig. 125), outer not 
longer, very small. Telson simple. 


1 species. 


1. I. ovalis Dana 1852 I.o., J.D. Dana in: P. Amer. Ac., v.2 p.220 | 1888 
I. o., T. Stebbing in: Rep. Voy. Challenger, v.29 p.255, 265, 1706 | 1893 I. o., A. Della 
Valle in: F. Fl. Neapel, v.20.p.345 t.55 f. 25—81 | 1853 & 55 I. elliptieus, J. D. Dana 
in: U. S. expl. Exp., v.13u p.844; t.56 f.4a—g | 1879 I. australis + I.punctatus, Haswell 
in: P. Linn. Soe. N.S.Wales, v.4 p. 274 t.12 f.2; p.343 t.23 f.1 | 1882 I. a., Haswell, 
Cat. Austral. Crust., p. 275.4 f.4, a,b | 1888 I. danae + 1. ellipticus + I. a., T. Stebbing 
in: Rep. Voy. Challenger, v.29 p.1203 t. 133; p. 1208, 


Back broadly oval (Fig. 123), peraeon segments 1 and 2 very short, 
pleon segments 1—3 medio-dorsally acutely produced (Dana); peraeon 
segment 7 and pleon-segments 1 and 2 with 2 sets of submedian spinules 
(sometimes produeing the effect of median processes). Head broader than 
long, with small rostrum x 
and little lobe above the che Semer 
rounded ocular lobe, be- 


plates 1 and 2 very small, 
hind margin pointed, 33° 

and4h withbluntly pointed °* Joint 74 
spinulose hind apex, 5th 7 
bilobed. Pleon segments 1 
ners sharply pointed, the Be 
margin above produced in- 
to a2 acuteprocess;: Pleon 
segment 3smaller,postero- 
lateral cormers ineurved, 
acute. Eyes prominent, 
hemispherical, red. An- 
tenna 1, 1°t and 24 joints 
subequal, 3% much shorter; 


4% joint 


flagellum rather longer BE 1m, DUB 
than pedunele; accessory Fig. 128—125. I, ovalis. 

Fig. 123. Dorsal view of 2. — Fig. 124. Gnatho- 
flagellum a small oblong pod 2. — Fig. 125. Dorsal view of pleon. 


joint, tipped with 2 setae. 
Antenna 2 about twice as long as 1%, as long as body; ultimate joint 
of pedunele longer than penultimate; flagellum much longer than elon- 
gate peduncle.e. Gnathopods 1 and 2 (Fig. 124), 3% and 4 joints very 
short, 5!k very long, longer than 24, slightly tapering, more in gnathopod 2 


45* 


r ; 


708 Jeilius, Dulichia + 


than in 1°; 6b joint longer than 24, slightly shorter than 5th, of uniform 
narrowness; finger half as long as 5#» joint, inner margin setuliferous. Peraeo- 
pods 1 and 2 robust, more so in J than Q, spinose; 4% joint very short, 
5th subequal to the short 24, 6th Jonger, in GC decidedly, in Q less decidedly, 
subchelate; the finger elosing against a little spinose palm or widened apex of 
6th joint. Peraeopods 3 and 4 equal, similar to preceding peraeopods but 
without palm; 24 joint channelled behind, outer margin cut distally into 2 teeth. 
Peraeopod 5 much longer, 24 joint somewhat expanded behind with a proximal 
lobe, distally as in peraeopods 3 and 4. Pleopods 1—3, peduncle rather short 
and broad. Uropods 1 and 2, outer ramus the shorter, both spinose, finely 
pectinate; peduncle longer than rami in uropod 1, subequal to longer ramus 
in uropod 2. Uropod 3, peduncle short, produced obtusely on inner side; 
inner ramus rather long, outer short, narrow (not shown in Fig. 125 p. 707). 
Telson subaeute, rather longer than broad. Colour, covered with minute red 
or grey spots. L. (distended) about 9 mm. 


Balabac Passage (north of Borneo), depth 56 m; Port Jackson [East-Australia], 
on calcareous sponges; Port Phillip (Melbourne), depth 60 m. 


7. Gen. Dulichia Kroyer 


1845 Dulichia (Sp. un.: D. spinosissima), Kreyer in: Naturh. Tidsskr., ser.2 o.1 
p. 512, 521 | 1888 D., T. Stebbing in: Rep. Voy. Challenger, v.29 p:213 | 1893 D., 
A. Della Valle in: F. Fl. Neapel, v.20 p.320 | 1894 D., G. O. Sars, Crust. Norway, v.1 
p: 634 | 1857 Dyopedos, Dulichia, Bate in: Ann. nat. Hist., ser.2 v.19 p.150, 271. 


Body (Fig. 126 p. 712) slender; peraeon segment 1 the shortest, 
6th and 7th coalesced. Pleon of only 5 segments besides the telson, the 
4th elongate. Head produced in front. Side-plates small, not contiguous. 
Antennae 1 and 2 long and slender, peduncle much longer than flagellum. 
Antenna 1 the longer; accessory flagellum very small. Upper lip slightly 
bilobed. Mandibular palp not very large, 39 joint narrow. Maxilla 1, inner plate 
small. Maxilla 2, inner plate fringed on inner margin. Gmnathopod 1 
not subchelate, 5tk joint larger than 6%, Gmathopod 2 in J subchelate, 
6!" joint powerful. Gnathopod 2 in oO similar to gnathopod 1, but with 
shorter 5% joint. Peraeopods 1 and 2 small, 24 rather longer than 1%. 
Peraeopods 3—5 stronger, rather or very long, peraeopod 5 the longest; 
24 joint linear, 4 elongate. Branchial vesicles narrow, usually on gnatho- 
pod 2 and peraeopods 1—3. Marsupial plates very broad, especially the 
2 middle ones. Pleopods large; peduncle long and strong. Uropods 1 
and 2 with narrow, linear, unequal rami. Uropod 3 entirely wanting. 
Telson oval. 


10 species. 
Synopsis of species: 


N VE 3 ae: 9 spinosissima . P-.709 
No peraeon and pleon segments with dorsal pro- 


Some peraeon and pleon segments with dorsal 
| 
jeetions — 2. 


form — 8. 


| Side-plate l ind produced forward in spine-like 
2 | 
Side-plate 1 ind without spine-like projeetion — 4. 


YO a ee a IE FE I aa! 
De ı{! ee re Rt pr ae 
ee, ya ee 
Er „ x - 


Dulichia 709 


Peraeopods 1 and 2, * joint not produced into 
ee a 2. D. monacantha . p.710 
Peraeopods 1 and 2, 2d joint produced into a tooth 3. D. arctica. . . . p. 710 


3 


vg without visual elements — 5. 
Eyes with visual elements — 6. 


Gnathopod 2 ind, defining tooth of palm at right 

angles to long axis of the 6th joint... . . 4. D. macera . . . p.710 
Gnathopod 2 ind, defining tooth of palm not at 

right angles to long axis of the. 6th joint . . 5. D.hirticornis. . p. 711 


4 


5 


Eyes not very small — 7. 


Gnathopod 2 ind, 6th joint without thumb-like 

DERFORSE: DORIS DRS 2 ae ne Re 7. D. nordlandica . p.711 
Gnathopod 2ind, 6th joint with thumb-like process 

near base — 8. 
Gnathopod 2 in d, 6th joint with thumb-like 

rose Bomborteil rn. ee ee 8. D. falcata. . . . p.712 
Gnathopod 2 in d, 6th joint with thumb-like 

process not contorted — 9. 


8 


Gnathopod 2 ind, finger very long . .... . 9. D. porrecta. . . p.712 


be Gnathopod 2 ind, finger not very long . . . . 10. D. tuberculata . p.713 


6 | N RE ER RS 6. D.normani. . . p. 711 


1. D. spinosissima Kroyer 1845 D.s., Kroyer in: Naturh. Tidsskr., ser.2 v.1 
p-512 t.6 f.la—h | 1846 D. s., Kreyer in: Voy. Nord, Crust. t.22 f.la—n | 1876 
D.s., A. Boeck, Skand. Arkt. Amphip., v.2 p.651 | 1893 D.s., A. Della Valle in: F. Fl. 
Neapel, v.20 p.324 t.55 f.15,16 | 1894 D.s., G. O. Sars, Crust. Norway, v.1 p.635 t. 228. 


Peraeon segments produced to acute lateral points; last peraeon- 
segment and pleon segments 1 and 2 each with a pair of tubercular medio- 
dorsal prominences; pleon segment 3 produced backward in a long slightly 
curved tooth. Head very large; carina produced to a lamellar acute-ending 
rostrum; post-antennal corners acutely produced. Side-plates projeeting 
acutely forward, 24 acutely bilobed, 34 and 4th acute below. Eyes large, 
prominent, acute at centre, dark red. Antenna 1 densely setose (setae not 
very long), nearly as long as the body (Kreyer: about 1'/, of body); 24 joint 
more than twice as long as 1°, obtusely produced at apex, 34 rather 
longer, as long as the 5-jointed flagellum; accessory flagellum 3-jointed. 
Antenna 2 shorter and narrower, ultimate and penultimate joints of peduncle 
each obtusely produced at apex, flagellum shorter than ultimate, 3-jointed. 
Gmathopod 1, 5!" joint very setose on hind margin, narrowing distally, longer 
and rather broader than the setose 6t%, which slightly widens distally; finger 
long, dentieulate on inner margin. Gnathopod 2 in 3, 24 joint produced 
in front to a triangular distal lobe, 5tk cup-shaped; setose on hind margin, 
6! broad, oval quadrangular, hind margin pretty well developed, palm defined 
by a strong tooth, and having a smaller one near the finger-hinge; finger 
strong, densely setose, overlapping palm. Gmnathopod 2 in © less powerful; 
6! joint rather broadly oval, without teeth. Peraeopods 1 and 2 small and 
feeble; 24 joint very little dilated. Peraeopods 3—5 long, strong; 4 joint 
subequal to 5th and 6! combined, which are densely spinose; finger strong. 
Uropods 1 and 2, rami narrow, acute, spinose. Telson rather longer than 
broad, with 2 setules on each side, apex narrowly rounded. Colour whitish, 
pellueid, with irregular brown and light yellow markings. L. © 12—31 mm. 


Arectie Ocean (Greenland, Spitzbergen, Finmark, Tromsö). Depth 20-300 m. 


710 Dulichia 


2. D. monacantha Metzg. 1875 D. m., Aug. Metzger in: Jahresber. Comm. 
D. Meere, v.2/3 p.296 t.6 f.8a, b | 1888 D. m., T. Stebbing in: Rep. Voy. Challenger. 
v.29 p.445 | 1894 D. m., G.O. Sars, Crust. Norway, v.l p.638 t.230 f.1 | 1893 D. tuber- 
culata (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 321. 


Body nearly as in D, porreeta (p. 712), especially in ©, perhaps rather 
more robust in d. Head very slightly produced in front. Side-plate 1 
in C produced forward in long horn-like process, in Q small, subquadrate. 
Side-plate 2 much larger in J than in ©, broadly quadrate with blunt front 
corner. Eyes perhaps a little smaller than in D. porrecta, and antennae 1 
and 2 rather less long, but in general as in that species. Gnathopod 1 as 
in the species compared, but gnathopod 2 in J not nearly so slender and 
elongate; 5th joint rather massive, 6% only a little longer than 5%, palm 
rather short, defined by a long tooth, the cavity between that and the tooth 
near finger-hinge being deep but not wide; finger of moderate length, over- 
lapping palm, with a tuberele on inner margin very near the hinge. Peraeo- 
pods 1—5 as in D. porrecta. Uropod 1, peduncle armed on outer margin 
only with 4 distant spines. Colour light yellowish, variegated with dark 
brown. L. 5—7 mm. 


Aretie Ocean and North-Atlantie (Finmark, depth 38—95 m; West-Norway); 
Skagerrak, depth 217 m; Kattegat (Great Belt and Aarhus Bay, depth 12—21 m). 


3. D. aretica J. Murdoch 1885 D.a., J.Murdoch in: P. U. S. Mus., v.7 p.521 | 
1893 D. tuberculata (part.). A. Della Valle in: F. Fl. Neapel, v.20 p. 321, 


Body smootb. Head slightly produced, forming an obtuse angle. Side- 
plate 1 produced into a sharp spine projecting forward, the rest unarmed. 
Eyes small, round, black. Gmnathopod 2, 24 joint dilated and armed with 
2 teeth, 6tk large, subtriangular, and armed on the edge with 2 long stout 
teeth. Peraeopods 3—5 not speeially long; 4 joint as long as 5tk and 
6tk combined. Uropod 2, outer ramus nearly twice as long as peduncle, 
inner a little longer. Colour greyish. L. ?. 


Arctic Ocean (Alaska). Depth 9 m. 


4. D. macera 0. Sars 1879 D.m., G.O.Sars in: Arch. Naturv. Kristian., ©. 4 
p.464 | 1885 D. m., G. O. Sars in: Norske Nordhavs-Exp., v.6 Crust. I p.220 t.18 
f.2, 2a | 1898 D. m., A. Della Valle in: F. Fl. Neapel, v.20 p. 322 t.55 f. 11. 


Body very slim, unarmed. Peraeon segment 1 very short, the rest longer, 
subequal. Head rather small, obtusely eonical. Side-plate 2 the largest, but 
all small, wide apart. Eyes rudimentary, represented only by an irregular 
aggregation of white pigment on each side of head. Antenna 1 probably 
much longer than body; flagellum 6-jointed; accessory flagellum 6-jointed, 
Antenna 2 rather longer than the body, densely setose with short setae; 
. flagellum longer than ultimate joint of pedunele, 5-jointed. Gnathopod 1 
slight, Stk joint longer and stouter than the slenderly oval 6%. Gmnathopod 
2 in C almost completely unarmed; 24 joint proximally very narrow, distally 
rather dilated, 5!" longer than broad, 6 oblong oval, with process standing out 
at right angles to its long axis close to base, at distal end having a sharp tooth, 
finger strong, faleiform, not reaching the basal process. Peraeopods 1 and 2, 
24 joint linear. Peraeopods 3 and 4 (and 5?) very long and slender, 4*% joint 
much longer than 5tk and 6th combined; finger apparently weak. Colour 
whitish, translucent. L. 10°5 mm. 


Arctic Ocean (north of Vesteraalen Islands; between Bear Island and Finmark, 
depth 842—1638 m). In the cold area. 


Duliechia zıı 


5. D. hirticornis O.Sars 1876 D.h., G.O.Sars in: Arch. Naturv. Kristian., 
v.2 p.261 | 1885 D.'h., 6. O. Sars in: Norske Nordhavs-Exp., v.6 Crust. I p.218 t.18 
£.1,1a | 1898 D.h., A. Della Valle in: F. Fl. Neapel, 0.20 p.523 t.55 f.13 | 1895 
D. hirsuticornis, G. O. Sars, Crust. Norway, v.1 p. 700. 


Body robust, somewhat depressed, smooth. Peraeon segments 1 and 2 
‘ short; the rest longer, subequal. Head not strongly produced, obtusely conical. 
Side-plates all very small, squamiform, subequal. Eyes very small, not 
prominent, rounded oval, oblique, with a very light whitish yellow pigment. 
- Antenna 1 robust, as long as body, densely setose with long setae; 39 joint 
of pedunele longer than 24, or than the 4-jointed flagellum; accessory 
flagellum very small, 3-jointed. Antenna 2 shorter and more slender, but 
armed like the 1°; ultimate and penultimate joints of peduncle subequal; 
flagellum shorter than in antenna 1. Gmathopod 1 very setose; 6!" joint 
about as long as 5b, narrowly oval. Gnathopod 2 in d, 6fk joint very 
setose, hind margin running out into a long palm-defining tooth, separated 
by a deep and rather wide interval from the smaller tooth near hinge of the 
strong, somewhat sinuous finger. Gnathopod 2 in Q like gnathopod 1. 
Peraeopods 1 and 2, 24 joint somewhat dilated. Peraeopods 3—5 subequal, 
robust, not very long, finger strong, faleiform. Colour nearly translucent, 
with faint yellowish pigmentation. L. © 11 mm. 

Arctic Ocean and North-Atlantie (north-west of Stat, far from coast; near 
Storeggen Bank; north-west of Finmark). Depth 775—1165 m. 


6. D. normani O.Sars 1895 D.n., G. O.Sars, Crust. Norway, v.1 p.699 t.VIIL 
f.2| 1895 D. n., A. M. Norman in: Ann. nat. Hist., ser. 6 v.15 p. 49. 


9. Body rather slender, quite smooth. Peraeon segments successively 
longer to the 4", Head angularly produced in front. Side-plates all very 
small. Eyes extremely minute, though well developed and with dark pigment, 
Antenna 1 rather strong, very long, densely fringed with long setae; 34 joint 
of peduncle much longer than 24, longer than the 5-jointed flagellum; 
accessory flagellum minute, 3-jointed. Antenna 2 armed like antenna 1, 
somewhat shorter; ultimate and penultimate joints of pedunele subequal. 
Gnathopods 1 and 2 apparently as in D. porreeta (p. 712). Peraeopods 1 
and 2, 24 joint expanded, between oval and fusiform. Peraeopods 3—5 
not very long nor very spinose. Colonr in spirit simply greyish white. L. 5 mm. 


Trondhjemsfjord. 


7. D. nordlandica Boeck 1871 D.n., A. Boeck in: Forh. Selsk. Christian., 
1870 p.263 | 1876 D. n., A. Boeck, Skand. Arkt. Amphip., v.2 p.658 t.29 £.11 | 1898 
D.n., A. Della Valle in: F. Fl. Neapel, v.20 p.824 t.55 f.14 | 1894 D.n., G. O. Sars, 
Crust. Norway, v.1 p.641 t. 231 f.2; t. 232 £.1. 


Body extremely slender, long, smooth. Head“not very large, not much 
produced. Side-plates all very small. Eyes without visual elements, represented 
by patch of white pigment on each side. Antennae 1 and 2 extremely 
slender and long, setose with short setae. Antenna 1 longer than the body; 
flagellum in S with 5 joints, in © with 4. Gnathopod 1, 4b joint longer 
than usual, 5th longer than the fusiform 6", Gmathopod 2 in J, 24 joint 
dilated only in distal half, 5th joint short, 6% with front margin very convex, 
hind slightly concave, distally produced to a sharp tooth with smaller one 
between it and hinge; the finger far overlapping both, with tuberele at its 
base, its apex reaching the 5tk joint or nearly. Gnathopod 2 in Q like 
gnatbopod 1, but with 5 joint not longer than 6%, Peraeopods 1 and 2, 


712 Dulichia 


24 joint narrow. ten 3—5 very slender and long; peraeopod 5 
scarcely longer than the 2 preceding, its 6! joint much longer than the 
5th, slightly expanded at base and armed with a row of strong spines. 
Uropod 2, peduncle more than half as long as peduncle of uropod 1. Colour 
pellueid, pale yellowish. L. 5 mm. 


Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (Lofoten Islands; South- 
and West-Norway). Depth 188—565 m. 


8. D. falcata (Bate) 1857 Dyopedos falcatus, Bate in: Ann. nat. Hist., ser, 2 v.19 


p.151 | 1862 Dulichia falcata, Bate, Cat. Amphip. Brit. Mus., p.348 t.54 f.10 | 1876.D. f., 


A. Boeck, Skand. Arkt. 
RT 


Amphip., v.2 p. 652 t.29 


AIR N f.10|1894.D. f., G.O ‚Sars, 
EN nn IS ER Q Crust. Norway, v.1 p. 640 
NR 8 t.231 f.1 | 1893 D.porrecta 
\ @ 2, f 4 ER 
N ar Cr 


Y\  (part.). A. Della Valle in: 


N IN F. Fl. Neapel, v.20 p. 322. 


EN Body (Fig. 126) 

) slender, long, smooth. 

Head somewhat pro- 

Fig. 126. D. falcata, 3. Lateral view. duced in front. Side- 
ae esgder: plate 1 verysmall, quad- 

rate, 24 rather larger in JS than in Q, slightly bilobed. 
Eyes very large, rounded, dark red. Antenna 1 slender, much 
\ "longer than the body; flagellum subequal to ultimate joint 


of peduncle, 5-jointed; accessory flagellum minute, 3-jointed. An- 

tenna 2 much shorter, like the 1° slender and feebly setose; 
flagellum shorter than ultimate joint of peduncle Gnathopod 1, 

\ 5th joint longer and stouter than the narrowly oval 6%, which is 

\ setose on both margins. Gmnathopod 2 in J, 24 joint expanded 

in front to a rounded distal lobe, 5tk rather longer than broad, 

6th forming near the base a contorted outstanding 'thumb-like 
process, the acute apex of which meets the point of the finger; the 
slightly concave remainder of the long palm running parallel with the 
«convex front margin and ending in a sharp tooth near the tubercle of 
the finger. Gnathopod 2 in O, 5#" joint rather shorter than 6%, dilated 
at middle of hind margin, otherwise resembling gnathopod 1. Peraeo- 
pods 1 and 2, 24 joint scarcely expanded. Peraeopod 5 notably Jonger than 
peraeopods 3 and 4; its 5th joint much ‚longer than the 6%, Uropod 1, 
peduncle nearly smooth. Uropod 2, peduncle fully half as long as peduncle 
of uropod 1. Colour whitish, pellueid, with dark elaret-red markings. L.6—8 mm. 


Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (Moray Firth; from 
Christianiafjörd to Vadsö [Norway]). Depth 37—94 m. 


9. D. porrecta (Bate) 1857 Dyopedos porrectus, Bate in: Ann. nat. Hist., ser.2 
v.19 p.151 | 1862 Dulichia porrecta, Bate, Cat. Amphip. Brit. Mus., p. 348 t.54 £.9| 
1876 D. p., A. Boeck, Skand. Arkt. Amphip., v.2 p.658 t.30 f.2,3 | 1893 D. p. (part.), 
A. Della Valle in: F. Fl. Neapel, v.20 p.322 t.55 f.12 | 1894 D.p., G. O. Sars, Crust. 
Norway, v.1 p.637 t. 229. 


Body smooth, much more slender in S than in 0. Peraeon segment 1 
much shorter than the rest. Head somewhat produced. Side-plate 1 small, 
quadrate, 24 Jarger in .J than in ©, the rest very small. Eyes rather large, 


ae rg Eee 


Dulichia, Paradulichia 713 


a little prominent, rounded, dark red. Antenna 1 about as long as the 
body; 34 joint rather longer than 24, subequal to 5-jointed flagellum; accessory 
flagellum very small, 3-jointed. Antenna 2 rather shorter; flagellum sub- 
equal to ultimate joint of pedunele. Both antennae setose with moderately long 
setae. Gmathopod 1, 5! joint expanded somewhat at the base, longer than 
the narrowly oval 6%, Gmnathopod 2 in J very long; 24 joint long and 
slender, 5" small, longer than broad, 6 elongate, densely setose along 
palm, which is defined from the short hind margin by a very long tooth, 
widely diverging from the small one adjacent to the tuberele on inner and 
very setose margin of the very elongate finger. Gnathopod 2 in 9 as long 
as gnathopod 1; 5" joint only about half as long as 6tk, which is somewhat 
tapering; finger rather short. Peraeopods 1 and 2, 24 joint considerably 
dilated in the middle. Peraeopods 3—5 not very elongate, sparingly spinose. 
Uropod 1, peduncle minutely spinulose on outer margin; inner ramus considerably 
longer than outer, inner margin minutely spinulose between the spines. 
Colour whitish, pellueid, with narrow transverse brownish stripes. L. © 5, 
SO 6 mm. 


Arctie Ocean, North-Atlantie, North-Sea, Skagerrak and Kattegat (West-Green- 
land; Iceland; Lofoten Islands; South- and West-Norway; Danish waters; Shetlands; 
Scotland). Depth 7—113 m. 


10. D. tuberculata Boeck 1871 D.t. + D. curticauda, A. Boeck in: Forh. 
Selsk. Christian., 1870 p.263, 264 | 1876 D.t.+ D.c., A. Boeck, Skand. Arkt. Amphip., 
v.2 p.655 t.30 £.4; p.657.t.29 f.9 | 1898 D.t.+ D.e., A. DellaValle in: F. Fl. 
Neapel, v.20 p.321 t.55 f.6—10; p. 325 | 1885 D.t., G. O. Sars in: Norske Nordhavs- 
Exp., v.6 Crust. I p.215 t.17 f£.6,6x | 1894 D. curticauda, G. O. Sars, Crust. Norway, 
v.1 p.689 t.230 f.2 | 1879 D. septentrionalis, G. O. Sars in: Arch. Naturv. Kristian., 
v.4 p.463. 


Body smooth. Head somewhat produced. Side-plate 1 small, quadrate, 
24 little longer in J than in ©. Eyes large, rounded, convex, dark red. 
Antenna 1 about as long as body; flagellum longer than ultimate joint of 
pedunele; accessory flagellum minute, 3-jointed, middle joint much the longest. 
Antenna 2 much shorter. Both antennae sparsely setose with short setae. 
Gnathopod 1 as in D. porreeta. Gnathopod 2 in JS, 24 joint widened except 
at base, 5t% triangular, small, 6 very. large, produced not far from base 
to a narrow, acute, outward bent tooth; the palm thence forward concave, 
parallel: to convex front margin, and ending in a sharp tooth near the 
tuberele on inner margin of the short finger. Gnathopod 2 in O like 
gnathopod 1, except that the 5t" joint is not longer than the 6", and bulges 


at middle. Peraeopods 1 and 2, 24 joint very little expanded. . Peraeo- 
pods 3—5 elongate; 5tk joint of peraeopod 5 much longer than 6%. Uropod 1, 


pedunele with about 8 spines on outer margin. Uropod 2, peduncle scarcely 
half as long as peduncle of uropod 1. Colour whitish, with some reddish 
brown markings.. L. 9 5 mm. 


Arctie Ocean, North-Atlantie, North-Sea and Skagerrak (from Christianiafjord to 
Vadsö [Norway], in moderate depths; Spitzbergen; West-Greenland). Depth 19--28 m. 


8. Gen. Paradulichia Boeck 


1871 Paradulichia (Sp. un.: P.typica), A. Boeck in: Forh. Selsk. Christian., 1870 
p-265 | 1876 P., A. Boeck,- Skand. Arkt. Amphip., v.2 p.660 | 1888 P., T. Stebbing in: 
Rep. Voy. Challenger, v.29 p.402 | 1893 P., A. Della Valle in: F. Fl. Neapel, v.20 p.319 | 
1894 P., G. O. Sars, Crust. Norway, v.1 p. 642. 


714 Paradulichia, Hyperiopsidae, Hyperiopsis 


Oo. In close agreement with Dulichia (p. 708), except that uropod 2 
is quite rudimentary, peduncle and rami being represented by a single 
conically tapering joint (Fig. 127). Antennae not so elongate as in Dulichia. 
Maxilla 2 has the inner plate not fringed with setae on the inner margin. — 
SO unknown. 


1 species. 

1. P.typica Boeck 1871 P.t., A. Boeck in: Forh. Selsk. Christian.. 1870 p.265 | 
1876 P.t., A. Boeck, Skand, Arkt. Amphip., ©.2 p. 660 1.29 f.8 | 18938 P.t., A. Della 
Valle in: F. Fl. Neapel, v.20 p.319 | 1894 P.t., G. O. Sars, Orust. Norway, v.1 p. 642 
1.232 f.2. 


O. Body smooth; peraeon rather tumid, segments 1 and 2 short. 
Head slightly produced in front. Side-plates all very small. Eyes large, 
prominent, rounded, dark red. Antenna 1, 3 joint of peduncle the longest, 
subequal to 5-jointed flagellum; accessory flagellum with 
3joints, 1% subequalto 24 and 3X combined. Antenna2 much 
shorter and thinner; flagellum shorter than ultimate joint of 
peduncle. Both antennae densely setose, setae not very long. 
Gnathopod 2, 6tk joint rather more broadly oval than in 
Dulichia (p. 708). Peraeopods 1 and 2, 24 joint very slightly 
dilated. Peraeopods 3—5 not greatly elongated; in peraeo- 
pod 5 the 4" joint as long as 5tt and 6!" combined, 5** little 
longer than 6! Uropod 1, peduncle strong, not elon- 
gate, outer margin fringed with about 8 spines; rami 
slender, densely fringed with small spines, inner ramus 
rather the longer, twice as long as peduncle. Uropod 2 


Kira (Fig. 127) reaching just beyond the oval telson, and 


Uropods and telson. armed with 1 apical and 2 lateral spines. Colour pale 


Kettler 9.0, Bares) yellow, with brownish patches. L. 5 mm. 


North-Atlantie and North-Sea (Hardangerfjord, depth 56 m; Aalesund, depth 
94—188 m), 


41. Fam. Hyperiopsidae 


1886 Hyperiopsidae, Bovallius in: N. Acta Soc. Upsal., ser. 8 v.13 nr. 9 p.3, 31. 


Head bulbous. Side-plates rather shallow. Eyes imperfectly developed, 
‘ but extensive. Antenna 1 with peduncle short; 1° joint of flagellum 
elongate, setose; accessory flagellum well developed. Mouth-parts normal, 
except that maxilla 1 is without inner plate (Chevreux in MS.). Gnathopods 1 
and 2 simple. Peraeopods 1 and 2, 4" joint widened and elongate. Peraeo- 
pods 3—5, 24 joint narrow. Peraeopod 5 elongate, almost filiform. Uro- 
pods 1—3 biramous, rami equal in uropod 1 and uropod 3, unequal in 
uropod 2. Telson very small, with a short apical ineision. 

Marine. 

l genus, 1 species. 


1. Gen. Hyperiopsis 0. Sars 


1885 Hyperiopsis (Sp. un.: H.voringü), G.O.Sars in: Norske Nordhavs-Exp., v.6 
Crust. I p.231 | 1886 H., Bovallius in: N. Acta Soe. Upsal.. ser.3 v.13.nr.9 p.31 | 1888 
H., T. Stebbing in: Rep, Voy. Challenger, v.29 p. 572. 

With the characters of the family. 


1 species. 


5 


1 1 A Fol N ee FE 
a RE NERRNEENUER: ER 
We Ber = ! 


Hyperiopsis, Gammarideorum genera dubia et species dubiae 715 


1. H. veringii O. Sars 1885 H. v., G. O. Sars in: Norske Nordhavs-Exp., 
v.6 Crust. I p.231 t.20 f.21 | 1886 H. voeringüi, Bovallius in: N. Acta Soc. Upsal., 
ser.8 v.13 nr.9 p.32 t.2 f.40 | 1899 H. vöringi, Chevreux in: Bull. Soc. zool. France, 
0.24 p.148. 


Body broad, smooth. Pleon segments 5 and 6 elongate. Head with 
slight projection over base of antenna 1. Side-plates 1—4 only about half 
as deep as their segments. Pleon segment 3, postero-lateral angles sub- 
quadrate. Eyes without refractive elements or distinetly developed pigment. 
Antenna 1 not quite half as long as body, 1° joint short and thick, 24 
and 39 very small; flagellum with 1 large joint carrying sensory filaments, 
followed by 12 short joints; accessory flagellum of 4 joints, 1° the largest. 
Antenna 2 shorter and more slender. Mandible, molar strong, palp very 
elongate. Maxilla 1, palp large, 1° joint more than half as long as 24, 
Maxilla 2, inner plate not fringed on inner margin. Maxillipeds, inner and 
outer plates well developed, but outer scarcely reaching middle of 24 joint 
of the elongate palp, 4 joint of which is unguiform. Gnathopods 1 and 2 
feeble, similar, not subchelate; 6t" joint slender, searcely longer than 5tR, 
Gnathopod 2 rather the longer. Peraeopods 1 and 2, 4tk joint tending to 
fusiform, nearly translucent, more than twice as long as 5tt and 6{k combined, 
6!" conical, carrying a mobile finger. Peraeopod 5 almost devoid of setae 
and with indistinet artieulation of its long slender joints. Uropods 1 and 2, 
pedunele longer than the rami. Uropod 3, peduncle subequal to the rami. 
Telson as broad as long; apical lobes rounded. Whole organism fragile. 
L. about 11 mm. 


Arctie Ocean and North-Atlantie (Norway, depth 1130 m; from stomach of 
Rodichthys regina Collett, depth 2410 m; Lofoten Isles, depth 1095 m). 


Gammarideorum genera dubia et species dubiae. 
Lepleurus Raf. 1820 L. (Sp. un.: L. rivularis), Rafınesque, Ann. Nat., p. 6. 
L. rivularis Raf. 1820 L.r., Rafinesque, Ann. Nat., p.6 | 1825 L. r., A.G. 
Desmarest, Consid. gen. Crust., p. 274, 


Pennsylvania and at Shannon run. In brooks. 


 „Lusyta Nardo 1847 L. (Sp. un.: Cancer algensis), Nardo, Prosp. Fauna Venet., 
p-20 | 1847 L., Nardo, Sinon. Spec. Chiereghini, p. 10. 


L. algensis Nardo 1847 Cancer a. (Chiereghin in MS.), Lusyta, Nardo, Prosp. 
Fauna Venet., p.20 | 1847 L.a., Nardo, Sinon. Spec. Chiereghini, p.10 | 1869 L. a., 
Lysita a., Nardo in: Mem. Ist. Veneto, v.14 p.331 t.15 f.7a—c; p.283 | 1893 Erich- 
thonius difformis (part.)?, A. Della Valle in: F. Fl. Neapel, v.20 p. 386. 


Head feebly rostrate. Eyes laterally prominent. Antenna 1 the longer. Gnatho- 
pods 1 and 2 rather large. Peraeopod 3 with finger reverted. Peraeopod 5 the longest. 


Adriatic (Venice). Tubicolous on Zostera marina. 


Pephredo Raf. 1814 P. (Sp. un.: P. heteroclitus) (nom. nud.), Rafınesque, 
Preis Decouv. somiol., p.26 | 1815 P. (nom. nud.), Rafinesque, Anal. Nat., p. 101 | 1817 
P. (Sp. un.: P. potamogeti), Rafinesque in: Amer. monthly Mag., v.2 p.41l. 


P. potamogeti Raf. 1817 P.p., Rafinesque in: Amer. monthly Mag., v.2 p.41. 
Hudson River and Fishkill. 


Poinaniyiie Rat. 1817 P &r- un.: P. Pina), rn 
Mag., v.2 p.4l. j 


P. littoralis Rat. 1817 DL, Banane a ae un Ag, Er 
North-Atlantie (Long-Island, New-York) and Hudson River. OR 
Sperchius Raf. : 1820 8. (Sp. un.: $. Tueidus), Rafinesque, Ann. at, p 6. 


S. lueidus Raf. 1820 S. L., Rafinosgue,. Ann. Be p- 6 .& 1825 8 % A. @. 
Desmarest, Consid. gen. Crust., p. 273. 


Lexington [Kentucky]. In springs and brooks. | 


lass 2 ee 


Addenda et Corrigenda. 


Pag. 12. — Add to the literature of the 2. Gen. Trischizostoma Boeck: 
1905 Guerinella, Chevreux in: Bull. Mus. Monaco, nr. 25 p.7. 


Pag.13.— Addtothe literature of species 1. Trischizostomanicaeense (A.Costa): 
1905 Gwuerinella nicaeensis, Chevreux in: Bull. Mus. Monaco, nr. 85 p.7. 


Pag. 22. — Add to the literature of species 3. Sophrosyne hispana (Chevreux): 
1900 8. h., Chevreux in: Rösult. Camp. Monaco, v.16 p.13 t.3 £.1. 


Pag. 23. — Put after the 12. Gen. Valettia Stebb.: 


12*. Gen. Vijaya A. Walker 


1904 Vijaya (Sp. un.: V. tenwipes), A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p. 231, 241. 


Cfr. Amaryllis (p. 23). 

1. V. tenuipes A. Walker 1904 V.t., A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p.241 t.1 f£.5. 

Cfr. Glycerina affinis (p. 61). 


Pag. 29 and 30. — Add to the species of the 15. Gen. Cyphocaris Boeck: 
3. C. richardi Chevreux 1905 C.r., Cheyreux in: Bull. Mus. Monaco, 
nr. 24 p.1 f.1, 2a—g. 


4. C. alicei Chevreux 1905 er @., Chevreux in: Bull. Mus. Monaes, nr. 27 
p-1 f.1, 2a—m. 


Cfr. ©. challengeri (p. 29). 
Pag. 30. — Put after the 15. Gen. Cyphocaris Boeck: 


15*. Gen. Paracyphocaris "Chevreux 


1905 Paracyphocaris (Sp. typ.: P. praedator), Chevreux in: Bull. Mus. 
Monaco, nr.32 p.1. 


1. P. praedator Chevreux 1905 P.p., Chevreux in: Bull. Mus. Monaco, 
nr. 52 p.1 f.1, 2a—g, 3a—.g. 


Pag. 31. — Add to the literature of species 2. Cyelocaris guilelmi Chevreux: 


1900 ©. g., G. O. Sars in: Nansen, Norweg. North Polar Exp., v.1 nr.5 
p-20 t.2, 3 | 1900 ©. faroensis, A.M. Norman in: Ann. nat, Hist., ser.7 %.5 
p. 197 1.6. £.5—15. 


718 


Addenda et Corrigenda 


Pag. 31. — Put after the 16. Gen. Cyclocaris Stebb.: 


Pag. 


Pag. 


16*. Gen. Lysianopsis S. J. Holmes 


1903 Lysianopsis (Sp. un.: L. alba), S. J. Holmes in: Amer. Natural., 
v.37 p.276 | 1905 L., 8. J. Hölnes in: Bull. U. S. Bureau en, v.24 p.475. 


‚Near Lysianella (p. 31). 


1. L. alba S. J. Holmes 1903 L..a., S. J. Holmes in: Amer, Natural., v. 37 
p.276 | 1905 L.a., S.J. Holmes in: Bull. U. S. Bureau Fish., v.24 p. 475 t.5 
f.1, f. in text. 


33 and 34. — Add to the species of the 19. Gen. Pseudalibrotus 
Della Valle: 


4. P. nanseni O. Sars 1900 P.n., G.O.Sars in: Nansen, Nbrweg. North 


Polar Exp., v.l nr.5 p.26 t.4, 5. 


5. P. glacialis O.Sars 1900 P.g. + P. g. var. leucopis, G. O. Sars in: 
Nansen, Norweg. North Polar Exp., v.1 nr.5 p.31 t.6. 


34. — Put after the 19. Gen. Pseudalibrotus Della Valle: 


19*,. Gen. Parambasia A. Walker & A. Scott 


1903 Parambasia (Sp. un.: P. forbesiü), A. O. Walker & A. Seott in: H. 
OÖ. Forbes, Nat. Hist. Sokotra, p. 217, 221. 


1. P. forbesii A. Walker & A. Seott 1903 P. f.. A. O. Walker & A. Scott 
in: H. O. Forbes, Nat. Hist. Sokötra, p. 221 t.14A f.5--5 m. 


Pag. 39. — Add to the literature of species 5. Lysianassa cinghalensis (Stebb.): 


Pag. 


Pag. 


Pag. 


Pag. 


1904 Lysianax c., A. O. Walker in: Herdman, Rep. Ceylon Pearl Fish., 
v.2 p.242 t.1f.6 | 1903 Z. urodus, A. OÖ. Walker & A. Scott in: H. O. Forbes, Nat. 
Hist. Sokotra, p. 220 t.14A f.4—4g. 
37 and 40. — Add to the species of 21. Gen. Lysianassa M.-E.: 

8. L. coelochir (A. Walker) 1904 Lysianax c., A. O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2 p.248 t.1 £.7. 
42. — Add to the species of 23. Gen. Normanion Bonnier: 

3. N. abyssi Chevreux 1903 N.a., Chevreux in: Bull. Soe. zool. France, 
v.28 p.82 f.la--f. 


48. — Put after the 28. Gen. Menigrates Boeck: 


28*, Gen. Charcotia Chevreux 


1906 Chareotia (Sp. un.: C. obesa), Chevreux in: Bull. Soe, zool. France, 
v.30 p. 163. 


1. C, obesa Chevreux 1906 C. o., Chevreux in: Bull, Soc. zool, France, 
v.30 p.163 f,3. 
49 and 51. — Add to the species of 29. Gen. Aristias Boeck: 


6. A.topsenti Chevreux 1900 A.t., Chevreux in: Rösult.. Camp. Monaco, 
v.16 p.18 1.3 £.2. 


Addenda et Corrigenda 719 


Pag. 5l and 52. — Add to the species of 30. Gen. Ambasia Boeck: 
2*, A. murmanica Brüggen 1905 A. m., E. Brüggen in: Trav. Soe. St.- 
Petersb., 0.36 p.3, 8; t. £.1. 


Pag. 51. — The name of the 1° species of 30. Gen. Ambasia Boeck is to 
be changed into: A. atlantica (M.-E.). Add to the literature of this 
species: 


1830 Gammarus atlanticus, H. Milne Edwards in: Ann. Sei. nat., v.20 
p.863 | 1840 LZysianassa atlantica. H. Milne Edwards, Hist. nat. Crust., v. 3 
p- 22 | 1862 L. a., Bate, Cat. Amphip. Brit..Mus., p. 68 t.10 f. 10 | 1857 L, marina, 
Bate in: Ann.nat. Hist., ser.2 «.19 p. 138 | 1857 L. m. + Opis typica (err., non 
Kroyer 1846!), A. White, Hist. Brit. Crust., p. 168; p.165 | 1898 Ambasia danielsseni, 
A.O. Walker in: P. Liverp. biol. Soe., «12 p.171 | 1900 &05 A.d., Lysianassa 
atlantica, A. M. Norman in: Ann. nat. Hist., ser.7 v.5 p.144; 0.16 p.79. 


Pag. 52. — Put after the 30. Gen. Ambasia Boeck: 


30*, Gen. Schisturella Norm. | 


1900 Schisturella (Sp. un.: S. pulehra), A. M. Norman in: Ann. nat. Hist., 
ser. 7 v.5 p. 208. 


Created for Ambasia pulchra (H. J. Hansen) (p. 52): 
1. S. pulchra (H. J. Hansen) 


Add to the literature of this species: 
1900 Schisturellapulchra, A.M. Norman in: Ann.nat. Hist., ser.7 0.5 p. 208. 


Pag. 54. — Add to the literature of species 1. Anonyx nugax (Phipps): 
1904 A. n., S. J. Holmes in: P. Calif. Ac., ser.3 v.3 p.513 t.35 £. 17—19; 
t.36 f.20 | 1877 Lysianassa fisheri, Lockington in: P. Calif. Ac., v.7 p.48. 


"Pag. 56. — Put after the 32. Gen. Anonyx Kröyer: 


32*, Gen. Socarnella A. Walker 


; 1904 Socarnella (Sp. un.: 8. bonnieri). A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p.231, 239. 


Öfr. Amaryllis (p. 23), Socarnes (p. 56). 
1. S. bonnieri A. Walker 1904 S.b., A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., .2 p.239 t.1 £.4. 
Pag. 58 and 60. — Add to the species of the 34. Gen. Hippomedon Boeck: 


7. H. bidentatus Cheyreux 1903 H.b., Chevreux in: Bull. Soe. zool. 
France, v.28 p.87 f. 4a—f. s 


8. H. serratus S. J. Holmes 1903 H. s., S. J. Holmes in: Amer. Natural., 
v.37 p.278 | 1905 H.s., S. J. Holmes in: Bull. U. S. Bureau Fish., v.24 p. 473 
t.4 f.2 and f. in text. 


Pag. 61. — Put after the 35. Gen. Glycerina Hasw.: 


35*. Gen. Paracallisoma Chevreux 


1903 Paracallisoma (Sp. un.: P.alberti), Chevreux in: Bull. Soe. zool. 
France, v.28 p.84. 


Cfr. Seopelocheirus (p.61). 


1. P. alberti Chevreux 1903 P. a., Chevreux in: Bull. Soe. zool. France, 
v.28 p.84 f.2, 3a—d. ü 


720 


Pag. 


Pag. 


Pag. 


Pag. 


Pag. 


Addenda et Corrigenda 


65 and 66. — Add to the species of the 39. Gen. Centromedon O0. Sars: 


5. C. erenulatus Ühevreux 1900 ©, erenulatum, Chevreux in: Result. 
Camp. Monaco, v.16 p.26 t.5 f.3. 


67. — Add to the species of the 40. Gen. Cheirimedon Stebb.: 


3. C. fougneri A. Walker 1903 C. f., A. O. Walker in: J. Linn. Soe., 
0.29 p.41 t.7 £.1—6. 


4. C.hansoni A. Walker 1903 C. h., A. O. Walker in: J. Linn. Soe., 
v.29 p.42 1.7 £.7—12. 


5. C. dentimanus Chevreux 1906 C.d., Chevreux in: Bull. Soe. zool. 
France, ®.30 p.159 £.1. 
68. — Add to the species of the 41. Gen. Tryphosella Bonnier: 
2. T. abyssi Norm. 1900 7. a., A.M. Norman in: Ann. nat. Hist., ser. 7 
v.5 p.205 t.6 £.16—20. 
69. — Add to the literature of species 2. Tryphosa kergueleni (Miers): 
1903 Hoplony& k., A. O. Walker in: J. Linn. Soc., v.29 p.5l. 


69 and 72. — Add to the species of the 42, Gen. Tryphosa Boeck: 
10. T. adarei A. Walker 1903 T.a., A. O. Walker in: J. Linn. Soe., 


v.29 p.49 t.8 f. 38—44. 


Pag. 


Pag. 


Pag. 


Pag. 


Pag. 


11. T. murrayi A. Walker 1903 T. m., A. O. Walker in: J. Linn. Soe., 
v.29 p.50 1.9 £.45—81. 


12. T. nugax S. J. Holmes 1904 T. n., 8. J. Holmes in: Harriman 
Alaska Exp., p. 234 f. 119, 120. 


13. T. cucullata A. Walker 1904 T. c., A. O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., ©. 2 p.244 1.4 f.8. * 
73. — Add to the literature of the 45. Gen. Tmetonyx Stebb.: 
1900 Haplony& (laps.?, corr.: Hoplonyx), A. M. Norman in: Ann. nat, 
Hist., ser. 7 v.5 p. 209, 211, 212. 
76. — Add to the literature of species 7. Tmetonyx leucophthalmus 
(0. Sars): 


1903 Hoplonyx leucophtalmus, Chevreux in: Bull. Soc. zool. France, 
v.28 p. 97. 


74 and 77. — Add to the species of the 45. Gen. Tmetonyx Stebb.: 


9. T. exiguus (Chevreux) 1902 Hoplony& e., Chevreux in: ©.-R. Ass. 
Frang., Sess. 30 v.2 p. 696 t.5 f,1a—k. 


10. T. stebbingi (A. Walker) 1903 Hoplonyx s., A. O. Walker in: J. 
Linn. Soc., v.29 p.52 t.9 f. 52—57*, 


79. — Add to the literature of species 3. Lepidepecreum clypeatum 
Chevreux: 
1900 L. c., Chevreux in: Rösult. Camp. Monaco, ®.16 p.28 t.4 f.2. 


81 and 83. — Add to the species ofthe 48. Gen. Orchomenella O. Sars: 


6. O. dilatata Chevreux 1903 O.d., Chevreux in: Bull. Soc. zool. France, 
v.28 p. 90 f.5a—f: 


Near O. laevis (p. 81). 


Addenda et Corrigenda 721 
7. ©. pinguides A. Walker 1903 O.p., A. O. Walker in: J. Linn. Soc., 
v.29 p.46 t.8 f. 24—380. 
Very near O. pinguis (p. 82). 


8. O. franklini A. Walker 1903 O.f., A. O. Walker in: J. Linn. Soc., 
0.29 p.47 t.8 £.31—36. 


Near O. minuta (p. 82). ; 
9. O. macronyx Chevreux 1906 O. m., Uhevreux in: Bull. Soc. zool. 
France, v.30 p. 161 £. 2. 
‚Pag. 84 and 85. — Add to the species of the 49. Gen. Orchomenopsis O. Sars: 


5. ©. proxima Chevreux 1903 O. p., Chevreux in: Bull. Soc. zool. France, 
v.28 p.93 f.6a—c. 


Very near O. obtusa (p. 85). 


6. O. chevreuxi Stebb.!) 1903 O. excavata (non Orchomene excavatus 
O. Sars 1891, laps. pro: cavimanus), Chevreux in: Bull. Soe. zool. France, v. 28 
p- 94 f.7a—g. 


Near O. zschauii (p- 85). 


7. O.nodimana A. Walker 1903 O.nodimanus, A. O. Walker in: J. 
Linn. Soe., v.29 p.44 t.7 f. 13—17. 


8. O.rossi A. Walker 1903 O.r., A. O. Walker in: J. Linn. Soc., v.29 
p-45 t.7 f.18—28. 


Nearly related to O. obtusa (p. 85). 


Pag. 85. — Put after the 49. Gen. Orchomenopsis (. Sars: 


50. Gen. Katius Chevreux 
1905 Katius (Sp.un.: K. obesus), Chevreux in: Bull. Mus. Monaco, nr.35 p.1. 
Near Orchomenopsis (p. 83). 


1. K. obesus Chevreux 1905 K.o., Chevreux in: Bull. Mus. Monaco, 
or.85 p.1 f.1, 2a—h, 3a—h. 


Pag. 87. — Add to the literature of Anonyx schmardae Heller: 
1902 Socarnes schmardai, Chevreux in: C.-R. Ass. Frane., Sess. 30 v.2 p.693. 


Pag.87. — Lysianassa fisheri Lockington enters into the synonymy of Anonyx 
nugax (Phipps), see above p. 719. 


Pag. 87. — Lysianassa marina Bate enters into the synonymy of Ambasia 
atlantica (M.-E.), see above p. 719. 
Pag. 100. — Add to the literature of species 1. Ampelisca eschrichtii Kroyer: 


1905 A. eschrichti, S. J. Holmes in: Bull. U. S. Bureau Fish., v. 24 
p. 525 | 1853 Pseudophthalmus pelagicus, Stimpson in: Smithson. Contr., v.6 nr. 5 
p- 57 | 1862 Ampelisca pelagica, Bate, Cat. Amphip. Brit. Mus., p. 94. 


Pag. 103. — Add to the literature of species 8. Ampelisca uncinata Chevreux: 
1900 A. u., Chevreux in: Rösult. Camp. Monaco, v.16 p.42 t.6 £.3. 


1) Nom. nov. After E. Chevreux. 
Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 46 


722 Addenda et Corrigenda 


Pag. 104 and 107.— The species 17. Ampelisca serraticaudata Chevreux enters 
into the synonymy of species 11. A. rubella A. Costa [fide: Chevreux 
in: Result. Camp. Monaco, v.16 p. 44]. 

Pag. 105. — Add to the literature of species 12. Ampelisca amblyops 0. Sars: 


1887 A. anomala (err., non O. Sars 1882!), Chevreux in: Bull. Soe. zool. 
France, v.12 p.567 [fide: Chevreux in: Result. Camp. Monaco, v.16 p.44]. 


Pag. 109. — Add to the literature of species 20. Ampelisca spinimana Chevreux: 
1900 A. s., Chevreux in: Rösult, Camp. Monaco, v. 16 p.39 t.6 £. 2. 


Pag. 99 and 111. — Add to the species of the 1. Gen. Ampelisca Kroyer: 


26. A. compressa S. J. Holmes 1903 A. c., S.J. Holmes in: Amer. 
Natural., 0.37 p.273 | 1905 A. c., S. J. Holmes in: Bull. U. S. Bureau Fish., v. 24 
p.480 t.6 f.1 and f. in text. 


27. A. tridens A. Walker 1904 A. t., A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p. 249 t.2 £. 11, t.4 £. 11. 


28. A.scabripes A. Walker 1904 A.s., A. O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2 p.250 t.2 f. 12. 


29. A. brachyceras A. Walker 1904 A.b., A.O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2 p. 251 t.2 £. 13. 


30. A. cyclops A. Walker 1904 A.c., A.O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p.253 t.2 f.14. 


31. A. chevreuxi A. Walker 1904 A.c., A.O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2 p. 254 t.3 £.15. 


Pag. 100 and 111. — Ampelisca pelagica (Stimps.) enters into the synonymy 
of species 1. A, eschrichtii Kroyer. 
Pag. 114. — Add to the literature of species 7. Byblis Ze Chevreux: 
1900 B. g., Chevreux in: R£sult. Camp. Monaco, v.16 p.45 t.7 £.1. 
Pag. 116. — The name of the 1° species of 3. Gen. Haploops Lilj. is to 


be changed into: H. dellavallei Chevreux. Add to the literature of 
this species: 


1900 H. dellavallei, Chevreux in: R&sult. Camp. Monaco, v.16 p. 47. 
Pag. 118 and 273. — A. 0. Walker 1904 (in: Herdman, Rep. Ceylon Pearl 
Fish, v.2 p. 246) creates the family Argissidae for the genera 
Platyischnopus Stebb. (p. 122) and Argissa Boeck (p. 276). 
Pag. 123 and 124. — Add to the species of the 2. Gen. Platyischnopus Stebb.: 


3. P.herdmani A. Walker 1904 P. h., A. O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2 p.247 t.2 £.10. 


Pag. 131. — Add to the literature of species 5. Urothoe poucheti Chevreux: 
1900 U. p., Chevreux in: Result. Camp. Monaco, v. 16 p.31 t.5 f.4. 


Pag. 129 and 132. — Add to the species of the 7. Gen. Urothoe Dana: 


8. U. spinidigitus A. Walker 1904 U.s., A. O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., ©.2 p.245 t.1 £.9. 


9. U. poseidonis Reib. 1905 TU. p., J. Reibisch in: Wiss. Meeresunters., 
v.8 Abt. Kiel p. 163 t.4 f. 17—21. 


Addenda et Corrigenda 723 


Pag. 138. — Paraphoxus maculatus (Ühevreux) is an accepted species; add 
to the literature of this species: 
1900 P. m., Chevreux in: R£sult. Camp. Monaco, 0.16 p. 34 t.5 f.5. 


Pag. 137 and 138. — Add to the species of the 3. Gen. Paraphoxus (. Sars: 


..8. P. spinosus S. J. Holmes 1903 P. s., S. J. Holmes in: Amer. Natural., 
v.37 p.276 | 1905 P. s., S. J. Holmes in: Bull. U. S. Bureau Fish., v.24 p.477 £. 


Pag. 142. — Add to the literature of species 5. Harpinia excavata Chevreux: 
1900 H. e., Chevreux in: Result. Camp. Monaco, v.16 p.37 t.6 £.1. 


Pag. 140 and 145. — Add to the species of the 5. Gen. Harpinia Boeck: 


13. H. latipes Norm. 1900 H.1I., A.M. Norman in: Ann. nat. Hist., 
ser. 7 v.5 p.338 f. 


Pag. 147. — Add to the literature of species Pontharpinia uncirostrata (Giles): 


1904 Leptophoxus uneirostratus, A. O. Walker in: Herdman, Rep. Ceylon 
Pearl Fish., v.2 p. 249. 


Pag. 149, 151 and 161. — Probolium spence-batei Stebb. (p. 161) is to be 
accepted among the species of 1. Gen. Amphilochus Bate: 6. A. spence- 
batei (Stebb.). Add to the literature of this species: 

1900 eng anomalus, Chevreux in: Rösult. Camp. Monaco, v.16 
p.48 t.7 £.2 


Pag. 150. — Synonyma of species 2. Amphilochus neapolitanus Della Valle 
are: A. melanops A. Walker (p. 152), fide A. M. Norman in: Ann. nat. 
Hist., ser.7 v.6 p.34 t.3 £.1, and: A. melanops A. Walker (p. 152), 
A. brunneus Della Valle (p. 151) and ? A. marionis Stebb. (p. 151), 
fide A. O. Walker in: J. Linn. Soc., v. 28 p. 300. 


Pag. 151—153. — Amphilochus longimanus Chevreux belongs to the 
2. Gen. Amphilochoides 0. Sars: 
4. A. longimanus (Chevreux) 1888 Amphilochus l., Chevreux in: Bull. 
Soe. zool. France, v.13 p.41 | 1900 Amphilochoides I., Chevreux in: Rösult. Camp. 
Monaco, v.16 p.50 t.7 £.3. 


Pag. 152 and 161. — The 1° species of 2. Gen. Amphilochoides (O. Sars 


changes its name into: 1. A. serratipes (Norm.), fide A. M. Norman 
in: Ann. nat. Hist., ser.7 v.6 p.35. Add to its literature from p. 161: 


1869 Probolium serratipes, A. M. Norman in: Rep. Brit. Ass., Meet. 38 p.273. 


Pag. 158. — Add to the species of 6. Gen. Cyproidea Hasw.: 


2. C. otakensis (Chilton) 1900 Cyproidia o., Chilton in: Ann. nat. 
Hist., ser. 7 v.5 p. 243 t.5. - 


' Pag. 160. — Add to the literature of Peltocoxa brevirostris (T. & A. Scott): 


1900 Stegoplax b., A.M. Norman in: Ann. nat. Hist., ser. 7 v.6 p.38. 


Pag. 161. — Putafter the 9. Gen. Paracyproidea Stebb.: 


10. Gen. Gallea A. Walker 


1904 Gallea (Sp. un.: @.tecticauda), A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p. 232, 256. 
1. G. tecticauda A. Walker 1904 @.t., A. O, Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2- p. 256 t.3 £.16, t.8 £. 16. 
46* 


724 


Pag. 


Pag. 


Pag. 


Pag. 


Pag. 


Pag. 


Pag. 


Pag. 


| Pag. 


Addenda et Corrigenda 


162 and 163. — Add to the species of 1. Gen. Seba Bate: 


3. S. armata Chevreux 1900 S.a., Chevreux in: Rösult. Camp. Monaco, 
v.16 p.111 t.13 £.1. 


Add to the literature of this species from species 2. S. saundersii 
Stebb. (p. 163): 


1889 Grimaldia armata, Chevreux in: Bull. Soe.zool. France, v. 14 p. 284 f. | 
1899 Seba a., Chevreux in: Ö.-R. Ass. Frang., Sess. 27 v.2 p. 483. 


164 and 168. — Add to the species of 2. Gen. Leucothoe Leach: 


12. L. euryonyx A. Walker 1901 L. e., A. O. Walker in: J. Linn. Soec., 
v.28 p.802 1.27 f. 24—26. 


13. L. hornelli A. Walker 1904 L. h., A.O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p. 258 t.3 £. 17. 


14. L. stegoceras A. Walker 1904 L.s., A.O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2 p.259 t.3 £.17a. 


167. — Synonyma of species 11. Leucothoe lilljeborgii Boeck are: 
L. furina Chevreux (non Savigny) (p. 165), L. ineisa D. Roberts. 
(p. 167) and L. serratipalma (laps. pro: serraticarpa Della Valle) fide 
A.M. Norman in: Ann. nat. Hist., ser.7 v.6 p.47, and: L. incisa 
D. Roberts. fide J. Reibisch in: Wiss. Meeresunters., v.8 Abt. Kiel 
p. 179 1.5 £.5. 


170 and 171. — Add to the species of the 1. Gen. Anamixis Stebh.: 


2. A. stebbingi A. Walker 1904 A. s., A. ©. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2 p.259 t.3 £. 18. 


172. — Add to the literature of 1. Gen. Metopa Boeck: 


1900 Metopina (Sp. typ.: Metopa palmata) (non Macquart 1835, Diptera!), 
A.M. Norman in: Ann. nat. Hist., ser.7 v.6 p.45 | 1902 Sthenometopa, A.M. 
Norman in: Ann. nat. Hist., ser. 7 v. 10 p. 480. 


173. — Add to the literature of species 2. Metopa robusta 0. Sars: 


1900 Metopina r., A.M. Norman in: Ann. nat. Hist., ser.7 v.6 p.45 | 1902 
Sthenometopa r., A. M. Norman in: Ann. nat. Hist., ser. 7 v.10 p. 480. 


174. — Add to the literature of species 5. Metopa palmata 0. Sars: 


1900 Metopina p., A.M. Norman in: Ann. nat. Hist., ser.7 0.6 p.45 | 1902 
Sthenometopa p., A. M. Norman in: Ann. nat. Hist., ser. 7 v.10 p.481. 


175. — Add to the literature of species 6. Metopa clypeata (Kroyer): 


1900 Metopina c., A.M. Norman in: Ann. nat. Hist., ser.7 v.6 p.45 | 1902 
Sthenometopa c., A. M. Norman in: Ann. nat. Hist., ser. 7 «.10 p.481. 


172 and 182. — Add to the species of the 1. Gen. Metopa Boeck: 


22. M. abscisa Norm. 1868 Montagua celypeata (err., non Leucothoe c. 
Kreyer 1842!), Bate & Westwood, Brit. sess. Crust., v.2 p.499 | 1900 Metopa 
abscisa, A. M. Norman in: Ann. nat. Hist., ser. 7 v.6 p.42 t.3 f.6—10. 


23. M. quadrangula Reib. 1905 M.q., J. Reibisch in: Wiss. Meeres- 
unters., v.8 Abt. Kiel p. 178 t.5 f.1—4. 


Addenda et Corrigenda 725 


Pag. 187, 190, 195. — The 7tk species of 4. Gen. Proboloides Della Valle 


is synonym to the 6 species of 1. Gen. Stenothoe Dana, and changes 
its name into P. elypeatus (Stimps.) with the following literature: 


7. P. elypeatus (Stimps.) 1853 Stenothoe clypeata, Stimpson in: Smithson. 
Contr., v.6 nr.5 p.51 | ?1862 S$. clypeatus, Bate, Cat. Amphip. Brit. Mus., p. 61 
t.9 £.7 | 1887 Metopa groenlandica, H. .J. Hansen in: Vid. Meddel., ser. 4 v.9 
p. 94 t.3 £.7—Te | 1905 M. g., S. J. Holmes in: Bull. U. S, Bureau Fish., v. 24 
p.483 1.6 £.3, f. in text. | 1893 Stenothoe clypeata + M.g., A. Della Valle in: 
F. Fl. Neapel, v.20 p.569; p.640 t. 59 £.55. 


Pag. 192 and 200. — Add to the genera of 11. Fam. Stenothoidae: 


2. Gen. Parametopa Chevreux 


1901 Parametopa (Sp. un.: P. kervillei), Chevreux in: Bull. Soc. Rouen, 
0.86 p. 233. 


1. P. kervillei Chevreux 1901 P. k., Chevreux in: Bull. Soc. Rouen, 
v.36 p.233 t.3. 


3. Gen. Stenothoides Chevreux 


1900 Stenothoides (Sp. typ.: S. perrieri). Chevreux in: Result. Camp. Monaco, 
v.16 p.55. 


1. S. perrieri Chevreux 1900 $. p., Chevreux in: Result. Camp. Monaco, 
v.16 p.55 t.8 £.2. 


Pag. 193 and 199. — Add to the species of 1. Gen. Stenothoe Dana: 


16. S. setosa Norm. 1900 $.s., A.M. Norman in: Ann. nat. Hist., ser. 7 
0.6 p.39 1.3 £.2—4. 


Near S. dollfusi (p. 196). 


17. S. cypris S. J. Holmes 1903 $.c., S.J. Holmes in: Amer. Natural., 
0.87 p.278 | 1905 $.e., S. J. Holmes in: Bull. U. S. Bureau Fish., v.24 p. 484 f. 


18. S. minuta S. J. Holmes 1903 S. m., S. J. Holmes in: Amer. Natural., 
0.87 p.278 | 1905 S. m., S. J. Holmes in: Bull. U. S. Bureau Fish., v.24 p. 485 f. 


19. S. alaskensis S. J. Holmes 1904 S.a., S. J. Holmes in: Harriman 
Alaska Exp., v.10 p.236 f. 121, 122. 


20. S. gallensis A. Walker 1904 $.g., A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p.261 t.3 £.19. 


Very near S. valida (p. 194). 


Pag. 196. — Add to the literature of species 8. Stenothoe dollfusi Chevreux: 


1900 8. d., Chevreux in: Rösult. Camp. Monaco, v.16 p.53 t.8 £.1. 


Pag. 198. — Add to the literature of species 12. Stenothoe marina (Bate): 


1904 8. m. var. sinhalensis, A. O. Walker in: Herdman, Rep. Ceylon 
Pearl Fish., v.2 p. 261. 


Pag. 200. — Put after the 11. Fam. Stenothoidae: 


11*, Fam. Ingolfiellidae 
1903 Ingolfiellidae, H: J. Hansen in: J. Linn. Soe., v.29 p. 117. 


726 Addenda et Corrigenda 


1. Gen. Ingolfiella H. J. Hansen 
1903 Ingolfiella, H. J. Hansen in: J. Linn. Soc., v.29 p.118, 128. 


1. I. abyssi H. J. Hansen 1903 I.a., H.J. Hansen in: J. Linn. Soe., 
v.29 p.118 t.14 £.1—18, t. 15 £. 19—21. 


2. I. littoralis H. J. Hansen 1903 1.1, H. J. Hansen in: J. Linn. Soc., 
v.29 p.124 t.15 f. 22—33. 
Pag. 201. — Add to the literature of species 1. Pereionotus testudo (Mont.): 


1903 P. t., A. O. Walker & A. Seott in: H.O. Forbes, Nat. Hist. Sokotra, 
p- 227 t.14B f.4a, b. 


Pag. 204. — Add to the literature of species 1. Iphinotus typicus (G.M. Thoms.): 
1902 I. typica, G. M. Thomson in: Ann. nat. Hist., ser. 7 v.10 p. 464. 


Pag. 205. — Put at the end of 12. Fam. Phliantidae: 


Gen. Kuria A. Walker & A. Seott 
1903 Kuria (Sp. un.: K. longimanus), A. O. Walker & A, Scott in: H.O. 
Forbes, Nat. Hist. Sokotra, p. 217, 228. 
Cfr. Bircenna (p. 205). 


K. longimana A. Walker & A. Scott 1903 K. longimanus, A. O. 
Walker & A. Seott in: H. O. Forbes, Nat. Hist. Sokotra, p. 228 t. 14B f.5—5n. 


Pag. 234. — Add to the literature of species Liljeborgia pugettensis (Dana): 
1904 Gammarus p., S. J. Holmes in: Harriman Alaska Exp., v.10 p. 239. 


Pag. 237, 238. — Add to the species of 1. Gen. Perioculodes 0. Sars: 


2. P. serra A. Walker 1904 P.s., A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p.262 t.4 f.20. 


Near P.longimanus (p. 237). 


Pag. 244. — Add to the species of 6. Gen. Oediceros Kroyer: 


3. O.newnesi A. Walker 1903 0. n., A. O. Walker in: J. Linn. Soe., 
v.29 p.53 t.9 f. 62-66, t. 10 f.67, 68. 


Very near O. saginatus (p. 244). 


Pag. 248. — Add to the literature of 9. Gen. Arrhis Stebb.: 
21880 Aceropsis (nom.nud.), Stuxberg in: Bih. Svenska Ak., v.5 nr.22 p.63. 


Pag. 254. — The name of the 24 species of 13. Gen. Acanthostepheia Boeck is 
to be changed into: 2. A. behringiensis (Lockington), of which A. pulchra 
Miers is a synonym. Add to the literature of species 2. A. behringiensis 
(Lockington): 

1904 A. behringanus, S. J. Holmes in: P. Calif. Ac., ser.3 ©.3 p.315 
t. 36 f. 25—28. 


Pag. 259. — Add to the literature of species 1. Monoculodes gibbosus Chevreux: 
1900 M. g., Chevreux in: Rösult. Camp. Monaco, v.16 p.59 t.8 £.3. 


Addenda et Corrigenda 727 


Pag. 259 and 267. — Add to the species of 17. Gen. Monoculodes Stimps.: 
19. M. edwardsi S. J. Holmes 1905 M.e., S. J. Holmes in: Bull. U. 
S. Bureau Fish., 0.24 p.487 f. ; 
Pag. 276. — Add to the species of 2. Gen. Tiron Lillj.: 
2. T.thompsoni A. Walker 1904 T. t., A. O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2 p.263 t.4 f.21. 


Pag. 285—287, 308. — Add to the genera of 22. Fam. Calliopiidae: 


1*, Gen. Bouvierella Chevreux 


1900 Bouwvierella (Sp. typ.: B. careinophila), Chevreux in: Rösult. Camp. 
Monaco, v.16 p.70. 


Created for Laothoes carcinophilus (Chevreux) (p. 287): 
1. B. carcinophila (Chevreux). 


Add to the literature of this species: 
1900 B. c., Chevreux in: Rösult, Camp, Monaco, ©.16 p.71 t.9 £.3. 


Pag. 285 and 294. — Put after the 6. Gen. Leptamphopus (. Sars: 


6*. Gen. Oradarea A. Walker 


1903 Oradarea (Sp. un.: O. longimana), A. O. Walker in: J. Linn. Soe., 
v.29 p.40, 56. : 


Near Amphithopsis (p. 289), but perhaps nearer Leptamphopus (p. 298). 


1. ©. longimana A. Walker 1903 O.l., A. O. Walker in: J. Linn. 
Soe., v.29 p.56 t.10 £.77—89. 


Strangely like Leptamphopus novaezealandiae (p. 294). 


Pag. 299 and 300. — Add to the species of 11. Gen. Atylopsis Stebb.: 
3. A. latipalpus A. Walker & A. Scott 1903 A.L, A.O. Walker & A. 
Seott in: H. ©. Forbes, Nat. Hist. Sokotra, p. 222 t.14A £.7—7l. 
Pag. 304. — Add to the literature of 15. Gen. Apherusa A. Walker: 
1858 Phaedra (Sp. un.: P. antiqua), Bate in: Quart, J. geol. Soc., v.15 
p. 138, 140. 
‘Pag. 304 and 308. — Add to the species of 15. Gen. Apherusa A. Walker: 


8. A. gracilis S. J. Holmes 1903 A. g., S.J. Holmes in: Amer. Natural., 
0.37 p.287 | 1905 A. g., S.J. Holmes in: Bull. U. S. Bureau Fish., v.24 p.495 f. 


9. A. clevei O. Sars 1904 4. e., G.O.Sars in: Publ. Expl. Mer, nr.10 
p-3 t.1. 


10. A. ovalipes Norm. 1906 A.o., A.M. Norman (& T., Scott), Crust. 
Devon Cornwall, p.75 1.8 £.1—8. 


A. antiqua (Bate) 1858 Phaedra a., Bate in: Quart. J. geol. Soe., v.15 
p-138 t.6 f.8 | 1905 P.a., Apherusa?, A. M. Norman in: Ann. nat, Hist., ser. 7 
v.16 p.81. 


728 


Pag. 


Pag. 


Pag. 


Pag. 


Pag. 


Pag. 


Pag. 


Addenda et Corrigenda 


312 and 315. — Add to the species of 2. Gen. Neopleustes Stebb.: 


8. N. pacificus (A. Walker) 1898 Paramphithoe pacifica, A. OÖ. Walker 
in: P. Liverp. biol. Soe., v.12 p.281. 


N. pugettensis (Dana) 1853 & 55 Iphimedia p., J.D. Dana in: U.S.expl. 
Exp., v.1311 p. 932; t.63 f.6a—g | 1898 Paramphithoe p., A. O. Walker in: P. 
Liverp. biol. Soe., v. 12 p. 281. 


320. — Put after the 5. Gen. Sympleustes Stebb.: 


6. Gen. Dautzenbergia Chevreux 


1900 Dautzenbergia (Sp. un.: D. grandimana), Chevreux in: R£sult. Camp. 
Monaco, v.16 p.73. 


Created for Sympleustes grandimanus (Chevreux) (p. 318): 
1. D. grandimana (Chevreux) 

Add to the literature of this species: 

1900 D. g., Chevreux in: R£sult. Camp. Monaco, ©. 16 p.73 t.10 £.1. 


321 and 324. — Add to the species of 1. Gen. Epimeria A. Costa: 


5. E.inermis A. Walker 1905 E.i., A. O. Walker in: J. Linn. Soe., 
v.29 p:54 t. 10 £.69. 


328 and 329. — Add to the species of 1. Gen. Atylus Leach: 


2. A. walkeri Stebb.!) 1903 A. antarcticus (non T. Stebbing 1878!), 
A.O. Walker in: J. Linn. Soe., 9.29 p.58 t. 11 £. 91—97. 


329 and 334. — Add to the species of 2. Gen. Nototropis A. Costa: 


8. N. minikoi (A. Walker) 1905 Paratylus m., A. O. Walker in: Gardiner, 
Fauna Mald. Laccad., v.2 p. 925 f. 141ı—v. 


9. N. granulosus (A. Walker) 1904 Paratylus g., A. O. Walker in: 
Herdman, Rep. Ceylon Pearl Fish., v.2 p. 265. 


334 and 338. — Add to the genera of 26. Fam. Melphidippidae: 


3. Gen. Hornellia A. Walker 


1904 Hornellia (Sp. un.: H. incerta), A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p.233, 268. 


1. H.incerta A. Walker 1904 H.i., A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p.269 t.4 f. 27. 


338 and 355. — Add to the genera of 27. Fam. Eusiridae: 


7. Gen. Eusirogenes Stebb. 


1904 Eusirogenes (Sp. un.: E. dolichocarpus), T. Stebbing in: Tr. Linn. 
Soc. London, ser.2 v.10ur p.13, 15. 


1. E. dolichocarpus Stebb. 1904 E. d., T. Stebbing in: Tr. Linn. Soe. 
London, ser.2 v.10u p.15 t.2A, 


!) Nom. nov. After Alfred O. Walker. 


N 


Addenda et Corrigenda 729 


Pag. 339 and 343. — Add to the species of l. Gen. Eusirus Kroyer: 


9. E. laevis A. Walker 1903 E.1., A.O. Walker in: J. Linn. Soe., 0.29 
p. 55 t. 10 £. 70—76. 


Cfr. E. antaretieus (p. 340). 


Pag. 345 and 346. — Add to the species of 3. Gen. Eusiroides Stehb.: 


‘4. E. sarsi Chevreux 1900 E.s., Chevreux in: Rösult. Camp. Monaco, 
v.16 p.65 t.9 £.2. 


5. E. orchomenipes A. Walker 1904 E.o., A.O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2 p. 264 t.4 f.23. 


Pag.350.— Addtothe literature ofspecies3. Rhachotropis grimaldii (Chevreux): 
1900 Rachotropis g., Chevreux in: Result. Camp. Monaco, v.16 p.68 t.9 £.1. 


Pag. 355 and 356. — Add to the species of 1. Gen. Batea Fr. Müll.: 
2. B. secunda S. J. Holmes 1903 B.s., S. J. Holmes in: Amer. Natural., 
v.37 p.284 | 1905 B. s., S.J. Holmes in: Bull. U. S. Bureau Fish., v.24 p.499 f£. 
Pag. 362. — Add to the species of 6. Gen. Atyloides Stebb.: 


2. A. gabrieli Sayce 1901 A.g., Sayce in: P. R. Soc. Vietoria, v.13 
p.230 t. 37, 38. ‘ 


3. A. fontanus Sayce 1902 A. fontana, Sayce in: P. R. Soe. Victoria, 
v.15 p.49 t.5. 
Pag. 362. — Add to the literature of species 1. Atyloides serraticauda Stebb.: 
1903 A. s., A. OÖ. Walker in: J. Linn. Soe., ©.29 p.58 t. 11 f. 90. 


Pag. 364 and 411. — Add to the genera of 30. Fam. Gammaridae: 


21*. Gen. Bathyonyx Vejd. 


1905 Bathyonyx (Sp. un.: B. devismesi), Vejdovsky in: SB. Böhm. Ges., 
nr.28 p.2. 


1. B. devismesi Vejd.. 1905 B. d., Vejdovsk$ in: SB. Böhm. Ges., 
nr.28 p.2 1.1 f.1—15, 1.2 1.16—19. 


21**, Gen. Pseudoniphargus Chevreux 


1901 Pseudoniphargus (Sp. un.: P. africanus), Chevreux in: Bull. Soe. 
zool. France, v.26 p.211. - 


1. P. africanus Chevreux 1901 P.a., Chevreux in: Bull. Soc. zool. 
‘France, 0.26 p. 211 f. 1, 2a—h, k. 


Pag. 370. — Add to the literature of 5. Gen. Crangonyx Bate: 


1902 Stygonectes (Sp. typ.: Crangonyx flagellatus), W. P. Hay in: P. U. S. 
Mus., v.25 p.430. 


Pag. 371 and 373. — Add to the species of 5. Gen. Crangonyx Bate: 


7. ©. bowersii C.J. Ulr. 1902 C©.b., ©. J. Ulrich in: Tr. Amer. mier. 
Soc., v.23 p.85 t. 14. 


730 Addenda et Corrigenda 


Pag.371. — Add to the literature of species 2. Crangonyx flagellatus Benedict: 
1902 C. f., Stygonectes sp. typ., W. P. Hay in: P. U.S. Mus., v.25 p. 430. 


Pag. 373. — Add to the literature of species 5. Crangonyx bifurcus O.P.Hay: 
1902 Niphargus b., W. P. Hay in: P. U. S. Mus., v.25 p. 429. 


Pag. 374. — Add to the literature of 7. Gen. Pallasea Bate: 
1901 Pleuracanthus (non Gray 1832, Coleoptera!) (part.) + Dybowskia 
(non Dall 1876. Mollusca!) (part.), Garjajeff in: Trudui Kazan. Univ., v.385 p. 16. 
Pag. 376. — Add to the literature of species 3. Pallasea cancellus (Pall.): 
1901 Dybowskia c., Garjajeff in: Trudui Kazan. Univ., v.35 p.40. 


Pag. 377. — Add to the literature of species 4. Pallasea gerstfeldtii (Dyb.): 
1901 Dybowskia cancellus var. g., Garjajeffin: Trudui Kazan. Univ., 0.85 p.40. 


Pag. 377. — Add to the literature of species 5. Pallasea quadrispinosa 0. Sars: 


1901 Dybowskia kesslerii var. euwropeus, Garjajeff in: Trudui Kazan. Univ., 
v.35 p.39. 


Pag. 378. — Add to the literature of species 6. Pallasea kesslerii (Dyb.): 
1901 Dybowskia k., Garjajeff in: Trudui Kazan. Univ., 0.35 p.39. 


Pag. 378. — Add to the literature of species 7. Pallasea baikali Stebb.: 
1901 Pleuracanthus lovenii, Garjajeff in: Trudui Kazan. Univ., 0.35 p.42. 


Pag. 379. — Add to the literature of species 8. Pallasea brandtii (Dyb.): 
1901 Dybowskia b., Garjajeff in: Trudui Kazan. Univ., 0.35 p.40. 


Pag. 379. — Add to the literature of species 9. Pallasea grubii (Dyb.): 
1901 Dybowskia g., Garjajeff in: Trudui Kazan. Univ., v.35 p. 39. 


Pag. 380. — Add to the literature of species 10. Pallasea cancelloides (Gerstf.): 
1901 Dybowskia ce., Garjajeff in: Trudui Kazan. Univ., v.35 p.40. 


Pag. 375 and 380. — Add to the species of 7. Gen. Pallasea Bate: 
P. dryshenskii (Garjajeff) 1901 Dybowskia d., Garjajeff in: Trudui 
Kazan. Univ., v.35 p.35 t.2 f.19, t.3 f. 68—72. 
P. meyerii (Garjajeff) 1901 Dybowskia m., Garjajeff in: Trudui Kazan, 
Univ., 0.35 p.36 t.2 £.17, t.3 £.58--62. 


P. nigra (Garjajeff) 1901 Pleuracanthus niger, Garjajeff in: Trudui 
Kazan. Univ., 0.35 p.40 t.2 f. 21, t.3 f. 79—83. 


P. viridis (Garjajeff) 1901 Dybowskia v., Garjejeff in: Trudui Kazan. 
Univ., v.35 p.32 t.2 f. 18, t.3 f. 63-67. 
Pag. 381. — Add to the literature of species 1. Weyprechtia heuglini (Buchh.): 
1900 Wayprechtia h., A. Birula in: Annuaire Mus. St.-Petersb., v. 4 
p. 442 £.3—9. 
Pag. 388. — Add to the literature of 13. Gen. Eucrangonyx Stebb.: 


1902 Bactrurus (Sp. un.: Crangonyxe mueronatus), W.P. Hay in: P. U. 
S. Mus., v.25 p. 430. 


Addenda et Corrigenda 731 


Pag. 388. — Add to the literature of species 1. Euerangonyx mucronatus (S. 
A. Forb.): 


1902 Crangonyx m., Bactrurus, W. P. Hay in: P. U. S. Mus., v.25 p. 430. 


Pag. 390. — Add to the literature of species5. Eucrangonyx antennatus (Pack.): 
1902 Niphargus a., W. P.Hay in: P. U. S. Mus., 0.25 p.430 f.6a—m. 


Pag. 391. — Add to the literature of 14. Gen. Axelboeckia Stebb.: 
1901 COtenacanthus (non Agassiz 1837, Pisces!) (part.), Garjajeff in: Trudui 
Kazan. Univ., 0.35 p.15. 
Pag. 392. — Add to the literature of species 2. Axelboeckia carpenterii (Dyb.): 
1901 Ctenacanthus c., Garjajeff in: Trudui Kazan. Univ., v.35 p.21. 


Pag. 404. — Add to the literature of 20. Gen. Neoniphargus Stebb.: 
1901 Unimelita, Sayce in: P. R. Soc. Vietoria, v.13 p. 237. 


Pag. 404 and 405. — Add to the species of 20. Gen. Neoniphargus Stebb.: 


2. N. spenceri (Sayce) 1901 & 02 Unimelita s., Sayce in: P. R. Soc, 
Vietoria, v.13 p.238 1.40; v.15 p. 57. 


3. N. fultoni Sayce 1902 N.f., Sayce in: P. R. Soe. Vietoria, v. 15 
p-57 t.7. 
Pag. 404. — Add to the literature of species 1. Neoniphargus thomsoni Stebb.: 


1901 Niphargus montanus, Unimelita (part.), Sayce in: P. R. Soc. Victoria, 
v.13 p.237 | 1901 N. m., Sayce in: Ann. nat. Hist., ser. 7 v.8 p. 562. 


Pag. 405 and 409. — Add to the species of 21." Gen. Niphargus Schiödte: 


11. N. mortoni G. M. Thoms. 1893 N. m., G. M. Thomson in: P.R. 
Soe. Tasmania, 1892 p.68 t.4 £.11, 12; 1.5 f. 1-5. 


Showing approximation to Iphigenella (p. 447). 


12. N. pulchellus Sayce 1900 N. p., Sayce in: P. R. Soc. Vietoria, 
v.12 p.152 t.15, 16. 


13. N. plateaui Chevreux 1901 N. p. + N. p. elongatus + N. p. 
robustus, Chevreux in: Bull. Soc. zool. France, ©.26 p.168 £.1, 2; p.173 f.3; 
p- 234 f.1. 


14. N, ladmiraulti Chevreux 1901 N. l., Chevreux in: Bull. Soc. zool. 
France, v.26 p. 174 f.1—4. 


re 408. — Add to the literature of species 6. Niphargus virdi Chevreux: 
1901 N. v.,. Chevreux in: Bull. Soc. zool. France, v.26 p.197 f.la, 2b—g. 


Pag. 408. — Add to the literature of species 7. Niphargus fontanus Bate: 
1901 N. f.. Chevreux in: Bull. Soc. zool. France, v.26 p.201 f.1, 2a—d. 


Pag. 408. — Add to the literature of species 8. Niphargus kochianus Bate: 
1904 N.k., Kane in: Ann. nat. Hist., ser. 7 v.14 p. 274 t.8 f.1—3. 


Pag. 409. — Add to the literature of species Niphargus caspary (Pratz): 
1905 N. e., N. casparyi,- Vejdovskf in: SB. Böhm. Ges., nr. 28 p.18. 


732 Addenda et Corrigenda 


Pag. 410. — Add to the literature of species Niphargus rhipidiophorus (Catta): 


1901 Gammarus r.?, Chevreux in: Bull. Soc. zool. France, v.26 p.216 
f.1, 2a—f. 
Pag. 410. — Add to the literature of species Niphargus subterraneus (Leach): 
1904 N. s., N. fontanus Bate?, Kane in: Ann. nat. Hist., ser. 7 v.14 p. 280 
t.8 £.4, 5. 
Pag. 411. — Add to the species of 22. Gen. Eriopisa Stebb.: 
2. E. sechellensis Chevreux 1901 E. s., Chevreux in: M&m. Soe. zool. 
France, v.14 p.403 f. 19—23. 
Pag. 417. — Add to the species of 27. Gen. Parelasmopus Stebb.: 
2. P. setiger Chevreux 1901 P.s., Chevreux in: Mörn. Soc. zool. France, 
v.14 p.412 f. 32—39. 
Pag. 417. — Add to the literature of species 1. Parelasmopus suluensis (Dana): 
1904 P. s, A. O. Walker in: Herdman, Rep. Ceylon Pearl Fish., v.2 
p. 278 t.6 f. 38. 
Pag. 421 and 428. — Add to the species of 30. Gen. Melita Leach: 


13. M. richardi Chevreux 1900 M. r., Chevreux in: Rösult. Camp. 
Monaco, v.16 p.81 t.10 £.3. 


14. M. parvimana S. J. Holmes 1903 M.p., S. J. Holmes in: Amer. 
Natural., v.37 p.279 | 1905 M.p., S. J. Holmes in: Bull. U. S. Bureau Fish., 
v.24 p. 506 f. 


15. M. zeylanica Stebb. 1904 M.z., T. Stebbing in: Spolia-Zeyl., v.2 
p.22 t.5. 
Pag. 429. — Add to the literature of species Melita inaequistylis (Dana): 


1904 Maera tenwicornis, A. O. Walker in: Herdman, Rep. Ceylon Pearl 
Fish., v.2 p.273 t.5 £.33. 


Pag. 433 and 439. — Add to the species of 33. Gen. Maera Leach: 


13. M. dubia Calm. 1898 M.d., Calman in: Ann.N. York Ac., v.11 
p.269 t.32 f.3. 


Near to M. fureicornis (p.437) and M. fusca (p. 440). 


14. M. hirondellei Chevreux 1900 M.h., Chevreux in: Rösult. Camp. 
Monaco, v.16 p.84 t. 11 £.1. . 


15. M. othonides A. Walker 1904 M.o. A.O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2 p.271 t.5 £.29. 


Very near M. othonis (p. 438). 


Pag. 441 and 445. — Add to the species of 34. Gen. Elasmopus A. Costa: 


10. E. insignis Cheyreux 1901 E. i., Chevreux in: Möm. Soc. zool, 
France, v.14 p.406 f. 24—81. 


1l. E. sokotrae A.Walker & A. Scott 1903 E.s., A. O. Walker & A. 
Seott in: H. O. Forbes, Nat. Hist. Sokotra, p. 228 t. 14B f. 1—1i. 


Near E. insignis Chevreux. 


12. E. dubius A. Walker 1904 E.d., A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p. 276 t.5 £.35. 


Compared with E. rapax (p.444) and Moera festiva (p. 431). 


N a 


12a I alt We a ER BE a a ET Ze etz 
ne en a a a ee ern. 
MR F A a VE Sa PR Te 


Addenda et Corrigenda 733 


18. E. spinimanus A. Walker 1904 E.s., A. O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2 p. 277 t.5 £. 36. 


Compared with E. rapax and E. affınis (p. 444). 


14. E. serrula A. Walker 1904 E.s., A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p. 277 t.8 £.37. 


Compared with E. rapax (p. 444). : 


15. E. latibrachium A. Walker 1905 E.1., A. O. Walker in: Gardiner, 
Fauna Mald. Laccad., v.2 p. 928 t.88 f.6—10. 
‚Pag. 460 and 477. — Add to the species of 44. Gen. Gammarus F.: 


3l. G. limnaeus S. I. Sm. 1871 @. lacustris (non G. O. Sars 1863!), 
S. I. Smith in: Amer. J.Sei., ser.3 v2 p.453 | 1874 G. limnaeus, S. I. Smith 
in: Rep. U. S. Fish. Comm., v.2 p. 651 t.2 £.6, 7. 


Near 6. pulex (p. 474). 


; 32. G. sarsii Sowinski 1898 @. s., Sowinski in: Bull. Ae. St.-Pötersb., 
v.8 p.869 1.2 £.7—16, t.3 £. 18. 


33. G. australis Sayce 1901 @. a., Sayce in: P. R. Soe. Vietoria, v.13 


p.233 t. 39. 

34. G. tetrachantus Garbini 1902 @.t., Garbini in: Zool. Anz., v.25 
p. 153 £.1. 

85. G. haasei Sayce 1902 @. h., Sayce in: P. R. Soe. Vietoria, v.15 
p.58 t.6. 


Compared with G. australis Sayce (p. 733) and Niphargus mortoni G,M. 
Thoms. (p. 731). 


36. G. propinguus W.P. Hay 1902 @. p., W. P. Hay in: P. U.S. Mus., 
0.25 p. 24. 


Compared with Dikerogammarus faseiatus (p. 460). 


37. G. purpurascens W.P.Hay 1902 @.p., W.P.Hay in: P. U.S. 
Mus., v.25 p.433 f.7a—n. 


Compared with G. limnaeus S. I. Sm. (p. 733). 


Pag. 462. — Add to the literature of species 1. Gammarus guernei Chevreux: 
1900 @.g., Chevreux in: Rösult. Camp. Monaco, v.16 p.76 t.10 f.2. 
?Near Niphargus rhipidiophorus (Catta) (p. 410). 


Pag. 473. — Add to the literature of species 24. Gammarus duebenii Lilj.: 
1897 @.d. var. wilkitskii, Birula in: Annuaire Mus. St.-Pötersb., p. 108. 


Pag. 497. — Add to the literature of 48. Gen. Parapallasea Stebb.: 


1901 Pleuracanthus (non Gray 1832, Coleoptera!) (part.), Garjajeff in: 
Trudui Kazan. Univ., 0.35 p. 16. 


Pag.498. — Add to the literature of species 1. Parapallasea borowsküi (Dyb.): 


1901 Pleuracanthus b. + P.b. var. abyssalis + P.b. var. dichraas (Gam- 
marus borawkii var. dichrou, laps. pro: @. borowskii var. dichrous), Garjajeff in: 
Trudui Kazan. Univ., v.35 p.42, 43. 

Pag. 493. — Add to the literature of species 2. Parapallasea lagowskii (Dyb.): 

1901 Pleuracanthus 1., Garjajeff in: Trudui Kazan. Univ., 0.35 p.43. 


734 Addenda et Corrigenda 


Pag. 498. — Add to the literature of species 3. Parapallasea puzyllii (Dyb.): 
1901 Pleuracanthus p., Garjajeff in: Trudui Kazan. Univ., 0.85 p. 48. 


Pag. 501. — Add to the literature of 50. Gen. Carinogammarus Stebb.: 


1901 Otenacanthus (non Agassiz 1837, Pisces!) (part.), Garjajeff in: Trudui 
Kazan. Univ., 0.35 p.15. 


Pag. 502. — Add to the literature of species 2. Carinogammarus wagii (Dyb.): _ 
1901 Ctenacanthus w., Garjajeff in: Trudui Kazan. Univ., v.35 p.21. 


Pag.506. — Add to the literature ofspecies Carinogammarus mucronatus (Say): 


1905 ©. m., S. J. Holmes in: Bull. U. S. Bureau Fish., v.24 p.503 £. | 
1905 C. m., Paulmier in: Bull. N.-York Mus., Bull. 91 Zool. 12 p.161 £. 30. 


Pag. 501 and 506. — Add to the species of 50. Gen. Carinogammarus Stebb.: 


C. roseus (Garjajeff) 1901 Ctenacanthus r., Garjajeff in: Trudui Kazan. 
Univ., 0.35 p.19 t.2 £.11, t.3 £.27-31. 


C. ruber (Garjajeff) 1901 Ctenacanthus r., Garjajeff in: Trudui Kazan. 
Univ., v.35 p.17 t.2 £.9, 10, t.3 f. 22—26. 


Pag. 508. — Add to the literature of 52. Gen. Acanthogammarus Stebb.: 

1901 Polyacanthus (non Cuvier & Valenciennes 1831, Pisces!) + Dybowskia 

(non Dall 1876, Mollusca!) (part.) + Ctenacanthus (non Agassiz 1837, Pisces!) 
(part.), Garjajeff in: Trudui Kazan. Univ., .35 p.15, 16. 

Pag. 508 and 512. — Add to the species of 52. Gen. Acanthogammarus Stebb.: 

7. A.labbei Chevreux 1903 A. l., Chevreux in: Bull. Mus. Paris, v.9 p.224. 


A.albus (Garjajeff) 1901 Polyacanthus a., Garjajeff in: Trudui Kazan. 
Univ., 0.85 p.29 t.2 f.14; t.3 £.41—45. 


A. balkirii (Garjajeff) 1901 Polyacanthus b., Garjajeff in: Trudui 
Kazan. Univ., 0.35 p.21t.1£.1; t.2£.15; 1.3 £.46—51 | 1903 Acanthogammarus b., 
Chevreux in: Bull. Mus. Paris, v.9 p. 224. 


A.flavus (Garjajeff) 1901 Polyacanthus f., Garjajeff in: Trudui Kazan. 
Univ., 0.35 p.25 t.2 £. 12; t.3 f.32-36. 


A. korotneffii (Garjajeff) 1901 Polyacanthus k., Garjajeff in: Trudui 
Kazan. Univ., 0.35 p.27 t.2 £.16; t.3 f. 58—57. 


A. maximus (Garjajeff) 1901 Polyacanthus m., Garjajeff in: Trudui 
Kazan. Univ., 0.35 p.23 t.2 f.13; t.3 £. 37—40. 


Pag. 509.— Addtotheliterature ofspeciesl.Acanthogammaruscabanisii(Dyb.): 
1901 Ctenacanthus e., Garjajeff in: Trudui Kazan. Univ., 0.35 p. 21. 


Pag. 509. — Add to the literature of species 2. Acanthogammarus zienkowiezii 
(Dyb.): 
1901 Ctenacanthus z., Garjajeff in: Trudui Kazan. Univ., v.35 p.21. 


Pag. 510. — Add to the literature of species 3. Acanthogammarus 
godlewskii (Dyb.): 


1901 Polyacanthus g. + P. g. var. vietorü, Garjajeff in: Trudui Kazan. 
Univ., 0.35 p.31. 


Addenda et Corrigenda 735 


Pag. 510. — Add to the literature of species 4. Acanthogammarus radosz- 
kowskii (Dyb.): 


1901 Ctenacanthus r., Garjajeff in: Trudui Kazan. Univ., 0.35 p.21. 


Pag.511.— Add to the literature of species 5. Acanthogammarusarmatus (Dyb.): 
1901 Dybowskia armata + D. a. var. ongureni, Garjajeff in: Trudui 
Kazan, Univ., v.35.p.38, 39 t.2 f.20; t.3 f. 73—78. 


Pag. 511. — Add to the literature of species 6. Acanthogammarus parasiticus 
(Dyb.): 
1901 Polyacanthus p., Garjajeff in: Trudui Kazan. Univ,, v.35 p. 31. 
Pag. 515 and 517. — Add to the species of 1. Gen. Dexamine Leach: 


5. D. serraticrus A. Walker 1904 D. s., A. O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., ©.2 p.265 t.4 f.24. 


Near D. spinosa (p. 515). 


Pag. 519 and 521. — Add to the species of 4. Gen. Polycheria Hasw.: 
3. P. atolli A. Walker 1905 P.a., A. O. Walker in: Gardiner,. Fauna 
Mald. Laccad., v.2 p. 926 t.88 f.1—5. 
Pag. 521. — Add to the literature of species 1. Guernea coalita (Norm.): 
?1904 @. laevis, A. O. Walker in: Herdman, Rep. Ceylon Pearl Fish., 
0.2 p.267 t.4 f.26. 
Pag. 525. — Add to the literature of species 2. Talitrus alluaudi Chevreux: 
1901 T.«a., Chevreux in: Mö&m, Soc. zool. France, v. 14 p.389 f. 1—7. 


Pag. 530 and 542. — Add to the species of 4. Gen. Orchestia Leach: 


24. O.anomala Chevreux 1901 O.a., Chevreux in: M&m. Soe. zool. 
France, v.14 p.393 f. 8—12. 


Seems very near Parorchestia hawaiensis (Dana), see p.558 and 735. 


25. O. excavata Chevreux 1902 O.e., Chevreux in: Bull. Mus. Paris, 

v.8 p.521. 
Pag. 545. — Add to the literature of species 3. Talorchestia deshayesii (Aud.): 
1900 Orchestoidea d., A. M. Norman in: Ann. nat, Hist., ser.7 v.5 p. 139. 


Pag. 552. — Add to the literature of species 17. Talorchestia brito Stebb.: 
1900 Orchestoidea: b., A. M. Norman in: Ann. nat. Hist., ser. 7 v.5 p.140. 


Pag. 555. — Add to the species of 7. Gen. Chiltonia Stebb.: 


. 2. C. australis (Sayce) 1901 Hyalella a., Sayce in: P.R. Soe. Victoria, 
v.13 p. 226 t.36 | 1902 Chiltonia a., Sayce in: P. R. Soe. Victoria, v.15 p. 47. 


3. C. subtenuis Sayce 1902 C.s., Sayce in: P. R. Soe. Victoria, v.15 

p.48 t.4. 

Pag. 558. — Add to the literature of species 2. Parorchestia hawaiensis (Dana): 
1900 Parorchestia h., T. Stebbing in: Fauna Haw., v.2 p.529 t.21e. 


Pag. 559 and 572. — Add to the species of 11. Gen. Hyale H. Rathke: 
23. H. chiltoni G.M. Thoms. 1899 H.c., G. M. Thomson in: Tr. N. 
Zealand Inst., v. 31 p. 206. 


24. H. brevipes Chevreux 1901 H.b., Chevreux in: M&m. Soe. zool 
France, v.14 p.400 f. 15—18. . 


736 Addenda et Corrigenda 


Pag. 564. — Add to the literature of species 9. Hyale macrodactyla Stebh.: 


1901 H. macrodactylus, Chevreux in: Me&m. Soc. zool. France, v.14 p. 397 
f. 13, 14. 


Pag. 565. — Add to the literature of species 11. Hyale prevostii (M.-E.): 


1900 H. prevosti, Chevreux in: Rösult. Camp. Monaco, 0.16 p.7 t.1 f.3| 
1903 H. nilssoni, A. O. Walker & A. Seott in: H. O. Forbes, Nat. Hist. Sokotra, 
p.219 t.14A f.3a--3e | 1904 H.n. var.? kuriensis, A. OÖ. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2 p. 238. 


Pag. 567. — Add to the literature of species 14. Hyale grimaldii Chevreux: 
1900 H. g., Chevreux in: R&sult. Camp. Monaco, v.16 p.10 t.2 £.2. 


Pag. 570. — Add to the literature of species 19. Hyale camptonyx (Heller): 
1900 H.c., Chevreux in: R&sult. Camp. Monaco, v.16 p.12 t.2 £.3. 


Pag. 574. — Add to the literature of species Hyale stebbingi Chevreux: 
1900 H. s., Chevreux in: R£sult. Camp. Monaco, v.16 p.8 t.2 £.1. 


Pag. 574 and 580. — Add to the species of 12. Gen. Hyalella S. I. Sm.: 


16. H. riehardi Chevreux 1902 .H.r., Chevreux in: Bull. Soc. zool. 
France, v.27 p.223 f.1, 2a—e. 


A littoral species from Isle of Alboran, between Spain and Moroeco. 


17. H. neveu-lemairei Chevreux 1904 AH. n.-I., Chevreux in: Bull. Soe. 
zool. France, ».29 p.131 f.1, 2a—d. 


From Lake Titicaca. 


18. H. pernix (Moreira) 1903 Allorchestes p.. C. Moreira in: Arch. 
Mus. Rio Jan., v.12 p.187 t.1, 2. 


Rio de Janeiro, Brazil, 2240 m above sea-level. 


Pag. 585. — Add to the literature of species Allorchestes littoralis Stimps.: 
1905 A. 1, Hyale 1., S. J. Holmes in: Bull. U. S. Bureau Fish., v.24 
p- 472 f.; t.3 f.2. 


Pag. 586 and 603. — Add to the genera of 33. Fam. Aoridae: 


8. Gen. Coremapus Norm. 


1905 Coremapus (Sp. typ.: C. versieulatus), A. M. Norman in: Ann. nat. 
Hist., ser.7 v.16 p. 78. 


1. C. versiculatus (Bate) 1905 ©. v., A. M. Norman in: Ann. nat. Hist., 
ser. 7 v.16 p.78. 


Add to this species the literature of Microdeutopus versiculatus 
(Bate) from p. 593. 


: Pag. 593. — Add to the literature of species 10. Mierodeutopus damno- 
niensis (Bate): 


1905 M. danmonensis, S. J. Holmes in: Bull. U. S. Bureau Fish., .24 
p. 515 f. - 


Addenda et Üorrigenda 737 


Pag. 594 and 599. — Add to the species of 4. Gen. Lembos Bate: 


10. L. smithi (S. J. Holmes) 1903 Autonoe s., S. J. Holmes in: Amer. 
Natural, 0.37 p.290 | 1905 A.s., S.J. Holmes in: Bull. U. S. Bureau Fish., 
v.24 p.516 f£. 


11. L. podoceroides A. Walker 1904 L. p., A. O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v.2 p.279 t.6 £.39. 
Near L. websterii (p. 599). 


12. L. chelatus A. Walker 1904 L. c., A.O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p.280 t.6 f.40. 


Pag. 603 and 630. — Add to the genera of 34. Fam. Photidae the follow- 
ing 4 genera: 


11. Gen. Cheiriphotis A. Walker 
1904 Cheiriphotis (Sp. un.: C©. megacheles), A. O. Walker in: Herdman, : 
Rep. Ceylon Pearl Fish., v.2 p.234, 283. 
Near Mieroprotopus Norm. (p. 604). 
1. C. megacheles (Giles) 1885 Melita m. (3), G. M. Giles in: J. Asiat. 
Soe. Bengal, v.54 p.70 t.3 | 1887 Eurystheus hirsutus (2), G. M. Giles in: 


J. Asiat. Soc. Bengal, v.56 p. 227 t.8 | 1904’ Cheiriphotis megacheles, A.O. Walker 
in: Herdman, Rep. Ceylon Pearl Fish., v.2 p. 284 t.6 f.42. 


Add to this species the literature of Eurystheus hirsutus Giles 
from p. 615. : 
12. Gen. Audulla Cheyreux 


1901 Audulla (Sp. un.: A. chelifera), Chevreux in: M&m. Soe. zool. France, 
v.14 p.431. 


1. A. chelifera Chevreux 1901 A. c., Cheyreux in: M&m. Soc. zool. 
France, v.14 p.432 £. 56-65 | 1903 A.c.. A.O. Walker & A. Seott in: H. O. 
Forbes, Nat. Hist. Sokotra, p. 225 t.14B f.2a,b. 


13. Gen. Bonnierella Chevreux 


1900 Bonnierella (Sp. un.: B. abyssi), Chevreux in: Rösult. Camp. Monaco, 
e.16 p. 97. 


1. B. abyssi (Chevreux) 1900 B.a., Chevreux in: Result. Camp. Monaco, 
v,16 p.97 t.11 £.3. 


Add to the literature of this species that of Podoceropsis abyssi 
Chevreux from p. 619, except Gammaropsis abyssorum J. Bonnier. 


2. B. abyssorum (Bonnier) 1900 B. a., Cheyreux in: R£sult. Camp. 
Monaco, v.16 p. 99. 


14. Gen. Chevalia A. Walker 


1904 Chevalia (Sp. un.: C. aviculae), A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p.234, 288. 


Intermediate between Fam. Photidae and Fam. Corophiidae. 


1. C. aviculae A. Walker 1904 C.a., A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p. 288 t.7 £.50; 1.8 £.80. 


Das Tierreich. 21. Lief.: T.R. R. Stebbing, Amphipoda I. 47 


738 Addenda et ÜCorrigenda 


Pag. 606 and 609. — Add to the species of 2. Gen. Photis Kroyer: 
6. P. longimana A. Walker 1904 P. longimanus, A. O. Walker in: Herd- 
man, Rep. Ceylon Pearl Fish., v.2 p. 286 t.7 f. 44. 
P.nana A. Walker 1904 P.n., A. O. Walker in: Herdman, Rep. Ceylon 
Pearl Fish., 0.2 p. 287 t.7 £.45. 
Generie position doubtful. 


Pag. 611 and 618. — Add to the species of 4. Gen. Eurystheus Bate: 
14. E. dentatus (Chevreux) 1900 Gammaropsis dentata, Chevreux in: 
Result. Camp. Monaco, v.16 p. 93 t.12 £.1. 
15. E. tenuicornis (S. J. Holmes) 1904 Gammaropsis t., S. J. Holmes 
in: Harriman Alaska Exp:, v. 10 p.239 f. 124. 
Compared with Megamphopus (Megamophus, laps.!) eornutus Norm. (p.621). 


16. E. zeylanicus (A. Walker) 1904 Gammaropsis z.. A. O. Walker in: 
Herdman, Rep. Ceylon Pearl Fish.. v.2 p. 282 t:6 f.4l. 


17. E. gardineri (A. Walker) 1905 Gammaropsis g., A. O. Walker in: 
Gardiner, Fauna Mald. Laccad., v.2 p. 929 t.88 f.11—14, 16, 17. 
Pag. 623 and 624. — Add to the species of 8. Gen. Protomedeia Kıayer: 
2. P. grandimana Brüggen 1905 P.g., Brüggen in: Trav. Soe. St.- 
Petersb., ®©.36 nr.1 p.6, 9; t.f.5. 
Pag. 627. — Add to the literature of species 3. Leptocheirus pinguis (Stimps.): 
1905 Ptilocheirus p., S.J. Holmes in: Bull. U. S. Bureau Fish., v.24 p.522 
f.; 1.12 £.3. 
Pag. 632 and 641. — Add to the species of 1. Gen. Ampithoe Leach: 
18. A. alluaudi (Chevreux) 1901 Amphithoe a., Chevreux in: M&m. Soe. 
zool. France, v.14 p.418 f. 40—45. 
19. A. intermedia (A. Walker) 1904 Amphithoe i., A. O. Walker in: 
Herdman, Rep. Ceylon Pearl Fish., v.2 p.290 t.7 f.46. 
Between A. rubricata (Mont.) and A. vaillantii (H. Luce.) (p. 639). 


Pag. 634. — Add to the literature of species 4. Ampithoe longimana (S.1.Sm.): 
1905 Amphithoe l., S. J. Holmes in: Bull. U. S. Bureau Fish., p. 509 f.; 

t.13 £.2. 
Pag. 635. — Add to the literature of species 6. Ampithoe valida (S. I. Sm.): 
1905 Amphithoe v., Paulmierin: Bull.N. York Mus., Bull. 91 Zool.12, p.164 f. 


Pag. 642 and 643. — Add to the species of 2. Gen. Pleonexes Bate: 
2. P. ferox Chevreux 1902 P. f., Chevreux in: C.-R. Ass. Franc., Sess. 30 
0.2 p.697 t.5 f.28—2i. 
Pag. 644. — Add to the species of 3. Gen. Grubia Üzern.: 
2. G. hirsuta Chevreux 1900 @.h., Cheyreux in: Bull. Soc. zool. France, 
v.25 p.95 .15. 


3. G. mierophthalma Chevreux 1901 @. m., Cheyreux in: Möm. Soc. 
zool. France, v.14 p.422 f.46--49 | 1905 G. m., A. O. Walker in: Gardiner, 
Fauna Mald. Laccad., v.2 p. 930 f. 142. 


4. G. longieornis A. Walker & A. Scott 1903 @.1., A. O. Walker & A. 
Seott in: H. O. Forbes, Nat. Hist. Sokotra, p. 226 t. 14B f.3a—3d. 


Perhaps a synonym of Amphithoides longicornis Kossm. (p. 645). 


Pag. 


Pag. 


Addenda et Corrigenda 739 


644 and 645. — Amphithoides comptus (S. I. Sm.) is to be accepted 
among the species of the 3. Gen. Grubia Üzern.: 5. G. compta (S. I.Sm.). 
Add to the literature of this species: 


1905 @. e., S. J. Holmes in: Bull. U. S. Bureau Fish., v.24 p.510 f£. 
645. — Put after the 4. Gen. Amphithoides Kossm.: 


4*, Gen. Paragrubia Chevreux 


1901 Paragrubia (Sp. un.: P. vorax), Chevreux in: M&m. Soc. zool. France, 
v.14 p. 426. 


1. P. vorax Chevreux 1901 P.v., Chevreux in: M&m. Soe. zool. France, 
v.14 p.427 £. 50-55. 


Pag. 645. — Add to the literature of species 1. Sunamphitoe pelagica (M.-E.): 


Pag. 


Pag. 


Pag. 


1900 Sunamphithoe p., Chevreux in: R£sult. Camp. Monaco, v.16 p. 102 
t.11 f.4. 


652. — Add to the literature of 4. Gen. Jassa Leach: 

1905 Bruzeliella (Sp. typ.: B. falcata), A. M. Norman in: Ann. nat. Hist., 
ser.7 v.16 p.83. 
654. — Add to the literature of species 4. Jassa pulchella Leach: 


1816 Jassa p., Leach in: Enc. Brit., ed. 5 suppl. p.426 (with no other 
species of Jassa) | 1829 J. p., Latreille in: G. Cuvier. Rögne an., n. ed. v.4 p. 122 
(with no other species of Jassa) | 1905 Bruzeliella falcata, A. M. Norman in: 
Ann. nat. Hist., ser.7 0.16 p.83, 92. 


. 655. — Add to the literature of species 5. Jassa pusilla (O. Sars): 


1905 Bruzeliella p., A.M. Norman in: Ann. nat. Hist., ser. 7 v.16 p. 84, 92. 


. 655. — Add to the literature of species 6. Jassa ocius (Bate): 


1905 Bruzeliella ocia, A. M. Norman in: Ann. nat. Hist., ser.7 v.16 p.84, 92. 


. 652 and 656. — Add to the species of 4. Gen. Jassa Leach: 


8. J. goniamera A. Walker 1903 J.g., A. O. Walker in: J. Linn. Soe., 
2.29 p.61 t. 11 1. 98-106. 


9. J.marmorata S. J. Holmes 1903 J. m., S. J. Holmes in: Amer. 
Natural,, v.37 p.289 | 1905 J. m., S. J. Holmes in: Bull. U. S. Bureau Fish., 
v.24 p.511 f. 


. 657 and 662. — Add to the species of 5. Gen. Ischyrocerus Kröyer: 


10. I. commensalis Chevreux 1900 I. c.,-Chevreux in: Rösult. Camp. 
Monaco, v.16 p.104 t.12 f.2. 


662 and 693. — Add to the genera of 38. Fam. Corophiidae: 


12. Gen. Grandidierella Coutiere 


1904 Grandidierella (Sp. un.: @. mahafalensis), Coutiere in: Bull. Soe. 
philom., ser. 9 v.6 p. 166. 


1. G. mahafalensis Coutiere 1904 G. m., Coutitre in: Bull. Soc. philom., 
ser.9 ©.6 p. 166 f.1—19. 


Compared with Camacho bathyplous Stebb. (p. 665), and Chevreuxius 
grandimanus Bonnier (p. 670). 


47% 


740 Addenda et Corrigenda 


Pag. 667. — Add to the literature of species 3. Cerapus tubularis Say: 
1905 ©. t., S. J. Holmes in: Bull. U, S. Bureau Fish., v.24 p. 517 £. 


Pag. 668 and 669. — Add to the literature of species 6. Cerapus calamicola 
(Giles) the literature of species 4. C. flindersi Stebb. (9), which is to 
be dropped, and: 


1892 Cerapus flindersi (3), Chilton in: Ree. Austral. Mus., v.2 p.1t.1| 
1904 ©. calamicola, A. O. Walker in: Herdman, Rep. Ceylon Pearl Fish., v.2 p. 293. 
Pag. 671 and 674. — Add to the species of 6. Gen. Eriethonius M.-E.: 
7. E. rubricornis (Stimps.) 1905 Erichthonius r., S. J. Holmes in: 
Bull. U. S. Bureau Fish., v.24 p.518 f£. 
Add to the literature of this species from species 5. Eriethonius 
hunteri (Bate) (p. 673): 
1853 Cerapus rubricornis, Stimpson in: Smithson. Contr., v.6 nr. 5 p.46 
f.33 | 1867 ©. r., O.rubiformis, Packard in: Mem. Boston Soe., v.1 p. 297. 
Pag. 671. — Add to the literature of species 1. Eriethonius brasiliensis (Dana): 
1905 Erichthonius minax, 8. J. Holmes in: Bull. U. S. Bureau Fish., 
v.24 p.519 £. 
Pag.672.— Addtotheliterature of species3. Eriethoniusmacrodactylus (Dana): 
1904 Erichthonius m., A. O. Walker in: Herdman, Rep. Ceylon Pearl Fish., 
v.2 p.292 t.7 £.48. 
Pag. 682 and 684. — Add to the species of 10. Gen. Siphonoecetes Kroyer: 


6. S. orientalis A. Walker 1904 S$. o., A. O. Walker in: Herdman, Rep. 
Ceylon Pearl Fish., v.2 p.294 t.7 £.49. 


7. S. smithianus Rathbun 1878 8, cuspidatus (non Aug. Metzger 1871!), 
(S. I. Smith in:) A. E. Verrill in: Rep. U. S. Fish Comm., v.1 p.501, 566 | 1905 
S. smithianus, M. J. Rathbun in: Pap. Boston Soe., ©.7 p. 74. 


Pag. 683. — Subtract from the. literature of species 3. Siphonoecetes 
colletti Boeck: 


1873 S. cuspidatus (non Aug. Metzger 1871!), (S. I. Smith in:) A. E. Verrill 
in: Rep. U. S. Fish Comm., v.1 p. 501, 566. 


Pag. 685 and 692. — Add to the species of 11. Gen. Corophium Latr.: 


13. C. maeoticum Sowinski 1898 ©. m.. Sowinski in: Bull. Ac. St. 
Petersb., v.8 p.362 t.1 f.1—5. 


14. C. triaenonyx Stebb. 1904 C. t., T. Stebbing in: Spolia Zeyl., v.2 
p- 25 t.6A. 


Pag. 692.— Add to the literature of species Corophium acherusicum A. Costa: 
1900 C. a., Chevreux in: R£sult. Camp. Monaco, v. 16 p. 109. 


Pag. 692. — Add to the literature of species Corophium eylindricum (Say): 


1905 ©. c., S. J. Holmes in: Bull. U. S. Bureau Fish., v.24 p. 521 f. | 1905 
C. c,, Paulmier in: Bull. N.-York Mus., Bull. 91 Zool.12 p. 167 £.37. 


Addenda et Corrigenda 741 


Pag. 701 and 706. — Add to the species of 5. Gen. Podocerus Leäch: 


11. P. synaptochir (A. Walker) 1904 Platophium s., A. O. Walker in: 
Herdman, Rep. Ceylon Pearl Fish., v.2 p.296 t.8 £. 52. 


12. P. zeylanicus (A. Walker) 1904 Platophium zeylanicum, A. O. 
Walker in: Herdman, Rep. Ceylon Pearl Fish., v.2 p.297 t.8 f. 53. 


Pag. 703. — Add to the literature of species 5. Podocerus chelonophilus 
(Chevreux & Guerne): 


1900 Platophium chelonophilum, Podocerus chelonophilus, Chevreux in: 
Result. Camp. Monaco, v.16 p.115 t.13 f.2, t.14 £.7; p. 166. 


Pag. 704. — Add to the literature of species 8. Podocerus laevis (Hasw.): 


1904 Platophium laeve, A. O. Walker in: Herdman, Rep. Üeylon Pearl 
Fish., v.2 p. 295 t.7 £.51. . 


Pag. 714 and 715. — Add to the species of 1. Gen. Hyperiopsis 0. Sars: 


2. H. australis A. Walker 1906 H.a., A. O. Walker in: Ann. nat. Hist., 
ser. 7 v.17 p. 454. 


Liljeborgia aequabilis Stebb. 1888 Z. a., T. Stebbing in: Rep. Voy. Challenger, 
v.29 p.988. 

Moera approximans Hasw. 1879 M.a., Haswell in: P. Linn. Soc. N.S.Wales, v4 
p.334 t.21 £.3. 

Cerapus bidens Üzern. 1868 €; b., Özerniavski in: Syezda Russ. Est., Syezda 1 Zool. p. 98. 

Amphithoe boecki Della Valle 1893 A. b., A. Della Valle in: F. Fl. Neapel, v. 20 
p. 462, 918 t. 57 £.36. 

Maera bruzelii Stebb. 1888 M. b., T. Stebbing in: Rep. Voy. Challenger, v. 29 
p. 1014 t. 97. 

Orehestia californiensis Dana 1854 O.c., J. D. Dana in: P. Ace. Philad., 0.7 p. 177. 

Lada chalubinskii Wrzesn. 1879 L. chalubinskiü, Wrzesniowski in: Zool. Anz., v.2 


p- 322. 
Atylus comes Giles 1888 A.c., G. M.Giles in: J. Asiat. Soc. Bengal, v. 57 p. 248 
t. 10 £. 8—10. 
. Amphithoe costata M.-E. 1830 A.c., H. Milne Edwards in: Ann. Sei. nat., v.20 p. 379 
t. 10 £. 14—16. 


Calliope didactyla G. M. Thoms. 1879 C©.d., G. M. Thomson in: Tr. N. Zealand Inst., 
v.11 p.240 t. 10c f.3 a—e. 

Maera diversimanus Miers 1884 M.d., Miers in: Rep. Voy. Alert, p.567 t.52f.D. 

Amphitopsis dubia Vosseler 1889 A.d., Vosseler in: Arch. Naturg., v, 551 p. 156 t. 8 
f. 32— 36. 

‚Enone Risso 1826 E. (Sp. un.: E. punctata), A. Risso, Hist. nat. Eur. merid., v.5 p. 96. 

Tryphosa erosa Meinert 1890 7‘. e., Meinert in: Udb. Hauchs, v.3 p.155 t.1 f. 25—29. 

Maera faseiculata (G. M. Thoms.) 1880 Megamaera f., G. M. Thomson in: Ann. 
nat. Hist., ser.5 v.6 p.5 t.1 f.5 | 1893 Maera f., G. M. Thomson in: P.R. 
Soc. Tasmania, 1892 p. 28. 

Örchestia gayi Nic. 1849 O.g., H. Nieolet in: Gay, Hist. Chile, v.3 p. 284. 

Iphimediopsis geniculata Della Valle 1893 I.g., I.eblanae, A. Della Valle in: F. Fl. 
Neapel, 0.20 p.19, 933. 

Podoprionides incerta A. Walker 1906 P.i., A. O. Walker in: Ann. nat. Hist., ser. 7 
v.17 pP. 457. 

Melita insatiabilis Fr. Müll. 1864 M.i., Fritz Müller, Für Darwin, p. 18 f. 11. 

Lada Wrzesn. 1879 L. (Sp. un.: L. chalubinskii), Wrzesniowski in: Zool. Anz., v.2 p.822. 

Melita leonis J. Murdoch 1885 M.I., J. Murdoch in: P. U. S. Mus., v.7 p. 521. 

Amphithonotus levis G. M. Thoms. 1879 A.l, G.M. Thomson in: Ann. nat. Hist., 
ser.d v.4 p.330 t.16 f. 1—4. 


742 Addenda et Corrigenda 


Melita messalina Fr. Müll. 1864 M. m., Fritz Müller, Für Darwin, p.18 £. 10. 
Gammarus multifasciatus Bate 1862 G.m., (Stimpson in MS.) Bate, Cat. Amphip. 
Brit. Mus., p. 211 t. 37 £.7. 
Gammarus nolens Johnst. 1827 G. n., G. Johnston in: Zool. J., v.8 p-179 | 1857 
he Anony&? n., A. White, Hist. Brit. Crust., p. 169. 
Protomedeia nordmannii (M.-E.) 1862 P.n., Bate, Cat. Amphip. Brit. Mus., p. 171. 
Ichthyomyzocus ornatus E. Hesse 1873 I. o., E. Hesse in: Ann. Sei. nat., ser. 5 v.17 
ar. 7 p.5t.4f.l. 
Concholestes pallidus (O. Sars) 1890 C. p., G.M.Giles in: J. Asiat. Soc. Bengal, 
v.59 p. 64. 
Pleustes parvus Boeck 1876 P.p., A. Boeck, Skand. Arkt. Amphip., v.2 p. 305 t. 23 
f.5 (? P. panoplus juv.). 
Cerapus pelagicus (Leach) 1840 C.p., H. Milne Edwards, Hist. nat. Crust., v.3 p.61. 
Gammarus plumicornis A. Costa 1853 @. p., A. Costa in: Rend. Soc. Borbon., n. ser. 
v.2 p. 176. 
Melita podager (M.-E.) 1862 M.p., Bate, Cat. Amphip. Brit. Mus., p. 184 t.33 £.5. 
Podoprionides A. Walker 1906 P. (Sp. un.: P. incerta), A. O. Walker in: Ann. 
nat. Hist., ser. 7 v.17 p. 457. 
Grayia pugettensis (Dana) 1862 @.p., Bate, Cat. Amphip. Brit. Mus., p. 101 t. 14 f. 4. 
Oedicerus puliciformis Giles 1888 O.p., G. M. Giles in: J. Asiat. Soc. Bengal, 
v.57 p.248 1.7 £.5, 6. 
Enone punctata (Risso) 1826 E.p., A. Risso, Hist. nat. Eur. mörid., v.5 p. 96. 
Gammarus redmanni Bate 1862 @. r., (Leach in MS.) Bate, Cat. Amphip. Brit. 
Mus., p. 212 t.37 £.9. 
Gammarus robustus S. I. Sm. 1874 @. r., 8. I. Smith in: Rep. U, S. geol. Surv. 
Terr.,. 1873 p. 610 t.2 f. 7—12. 
Talitrus rubropunctatus Risso 1816 7. r., Risso, Orust.. Nice, p. 127. 
' Gammarus spetsbergensis Vosseler 1889 @. s., Vosseler in: Arch. Naturg., v. 551 
p.158 1.8 £.2531. 
Lysianassa spinifera Stimps. 1853’ L.s., Stimpson in: Smithson. Contr., v. 6 nr.5 p.49. 
Gammarus spinipes Johnst. 1829 @. s., G. Johnston in: Zool. J., v.4 p. 417. 
Ichthyomyzocus squatinae E. Hesse 1873 I. s., E. Hesse in: Ann. Sei. nat., ser.5 v.17 
or.7 p.12 t.4 £. 19—27. 
ÖOniseus stroemianus O. Fabr. 1780 O.s., O. Fabriecius, Fauna Groenl., p. 261. 
Gammarus subtener Stimps. 1864 @. s., Stimpsen in: P. Ace. Philad., B. 157. 
Talitrus tripudians Kreyer 1845 T. t., Kreyer in: Naturh. Tidsskr., de 2v.1p.311t.3 
f.2 a—e. 
Gammarus trunceatus Viv. 1805 @.t., Viviani, Phosphor. Maris, p-8 1.2 £.5, 6. 
‚Gammarus unguiserratus A. ÜUosta 1853 @.u., A. Costa in: Rend. Soc. Borbon., 
n. ser. v.2 p.176. 
‚Iphimedia vulgaris Stimps. 1853 I. v., Stimpson in: Smithson. Contr., v.6 nr.5 p.53. 


Alphabetical Index. 


page 
abbreviata (Urothoe) .... . .- 129 
abbreviatus (Gammarus) . . . . 462 
abdita (Cerapodina). -. » .»...». 668 
abditus (Cerapus). . . ».... 668 
abditus (Cerapus) . . - » 2... 671 
abditus (Eriehthonius). . . . . . » 671 
aberrans (Leptocheirus). . . . - 626 
aberrans (Protomedeia) .. . - . - 626 
abseisa (Metopa) . . .:..... 724 


abyssalis (Gammarus borowskii var.) 498 
abyssalis (Pleuracanthus borowskii var.) 733 


abysei; (Andsnis)- . 2. 3 nu 94 
abyssi (Andaniexis). . » -» :». 94 
ahyssr (AstyFa) -- isn 2 278 
abyssi (Bonnierella). .... . . 737 
SbyRsi (ByblBe) : 2er 113 
abyssicola (Ampelisca) . . . - 104 
abyssicola (Cressa) .. . . ... 192 
abyssicola. (Danaia) . . . » . ....19 
abyssicola (Gitana) . .. :... 156 
abyssi (Euryporeia) . . » .» :»... 43 
#BY6881:(H81166) 2... ER. ,?) 
Shyasi. (Harpinla) .» - .2-2.ur,%0% 144 
abyssi (Hippomedon) . ......- 43 
abyssi (Ingolfiella) -. . - . .» . .. 726 
abyssi (Lysianassa) . . » 2... 43 
abyssi (Normanion). . ».... 718 
abyssinus (Oniseus) ». » » ».. 2... 859 
abyssi (Paratryphosites). . . -» - 43 
abyssi (Pardalisca) . . ..... 222 
abyssi (Pardalisea) .... . - 225, 228 
abyssi (Podoceropsis) . . . . 619, 737 
abyssi (Tryphosella) . ..... 720 
abyssorum (Acanthozone) . . . . . 315 
abyssorum (Andania) ....... 96 
abyssorum (Anonyx). . » » 2... 84 
abyssorum (Bonnierella) 737 
abyssorum (Gammaropsis) . . . 619, 737 


abyssorum (Gammarus ussolzewii var.) 488 


abyssorum (Mesopleustes). . . . 315 
abyssorum (Orchomene) . . ... - 84 
abyssorum (Orchomenopsis). . . 84 
abyssorum (Pleuste) ....... 315 


abyssorum (Stegocephalus) . . .» » 96 


page 
Acanthechinns. = = ...5.. 0 ..0.. 326 
Acanthogammarus . .... 508, 734 


Acanthonotosoma . » » » „.. . 218,299 


Acanthonotozoma.. . »......- 218 
Acanthonotozomatidae .. . 210 
BAosnthonome, u. ae 218 
acanthophthalmus (Amphithonotus) . 515 
acanthopoda.(Iphigenella). . . . 447 
Acanthosoma, 3 » sen iss 324 
Acanthostepheia_. .... . 253, 726 
Acanthostephia . . .. - ». 2... 253 
Aranihozoms, .. - ce 218 
Acanthozone . ... . 287,299, 308, 324 
acanthurus (Tiron) . . ..... 276 
En VE Er SE . ...254 
EEREODRR: 0 et 254, 726 
En 1 VE a ee 248 
acherusica (Audouinia) . ». .»... 692 
acherusicum (Corophium) . . 692, 740 
Maldoabonin4.,- 2: 4 Se ns 14 
Aecidostomum. . ... -» EL. 
acinaces (Ampelisca) . . ... . 108 
B6o0BtioBlöma'.. 2. \ ereliente 15 
Aconliosioms .;. : .-'. =. 2 =. 16 
Actinsaeanthus.:. „nut. = 326 
acudigitata (Callimerus) . . ». . - 150 
aculata (Rhachotropis). .. . . - - 348 
aculeata (Pontogeneia). . . 348,350, 351, 

351, 354 
aculeata (Rhachotropis).. . - - . 348 
aculeata (Tritropis) . ». - »...» - 348 
aculeatus (Acanthonotus) - - » » . 348 
aculeatus (Amphithonotus) . . . 348, 352 
aculeatus (Oniscus) . . » » +». - 348 


aculeatus (Rhachotropis). . . - 348,351 


acutifrons (Bathymedon) 257 
acutifrons (Halimedon) . . .». . - 251 
acutifrons (Westwoodilla). . . . 251 
acutus (Hoplonyx) - ». .»...... 75 
acutus (Tmetonyx) - . -» »»» . 75 
adarei (Tryphosa). ....... 720 
adhaerens (Stenothoe). . . . . - 199 
WERHBOFNBITT LT EB ee 243 
aequabilis (Liljeborgia) . - » » - - 741 


744 Alphabetical Index 


page 
aequicornis (Ampelisca) 105, 105, 106, 106 
aequicornis (Ampelisca). . . . . 106 


aequicornis (Halicreion). . . . . 247 
aequicornis (Idunella). . . .. . 234 
aequicornis (Metopa) . . ... . 180 
aequicornis (Monoculodes) . . . . - 247 
aequicornis (Oediceros) . . . . 247,267 
aequimanus (Monoeulodes). . . . - 237 
aequimanus (Niphargoides) . . . 453 
aequimanus (Oedicerus) . - » :. - 238 
aequimanus (Perioculodes) . . . 238 
aeqvicornis (Ampelisca) . » . .. . 106 
aeqvicornis (Idunella) .. . ... . 234 
aeqvieornis (Lilljeborgia) . . . . . . 254 
aeqvicornis (Metopa) . : 2.2... 180 
aeqvimanus (Niphargoides). . . . - 453 
afer (Eurystheus) . . : .» 2... 612 
afer (Lemboides) : . : . .... 600 
affine (Corophium) . . . . 2. .688 
affinis (Amathillina). . : .... 501 
affinis (Amathillopsis). . :. . - . 385 
affinis (Anonyx). . -» .... 2,322, 08 
BIS KAnoRyX)  ..... 00:0 5 66 
Minis (Byblis): ... ».. 4.2. 0% 114 
affınis (Centromedon) » .» .... - 66 
affınis (Elasmopus) . » .. 2... 444 
affinis (Eusirus). . . » :...  . 238 
affinis (Gammarus) 2. .2..... 472 
affinis (GAlycerina). . -»...2. 61 
affınis (Ichnopus) . » -» » . 2... 53 
affinis (Leucothoe) . . . .... 168 
affinis (Lysianassa) . . . .... 87 
affinis (Metopa) . - - - . 2..,% 176 
#Hinis (Metopa). . . . „u. 177 
affınis (Monoeulodes) . . . : ... 261 
affınis (Oediceros)... . . 258, 259, 261, 261, 

262, 263, 265 
affinis (Onisimus) . » . : 2... 28 
affinis (Pontoporeia). . . :... 128 
affınis (Pontoporeia). : » 2.2... 128 
ae Plahtras); : 1:2 2.080 5 524 
afra (Gammaropsis) . . » » 2... 612 
afra (Protomedeia) . .. ... 612, 613 
africana (Talorchestia) . . . . . 554 
africanus (Pseudoniphargus) . . 729 
agassizi (Ampelisea). . : .... 111 
Spass (Byblis) -. 3°. 322.80 8 111 
agilis (Megaluropus) . . .... 420 
afilis (Orehestis) 52,5... 540 
Rylaors ZT NEE NEN 786 
aheneus (Echinogammarus) . . . 487 
aheneus (Gammarus) . ...... 487 


aheneus subvar. miniatus (Gammarus) 487 
aheneus subvar. suceineus (Gammarus) 487 
aheneus var; setosus (Gammarus) . . 487 
alaskensis (Stenothoe). . . . . . 725 
alba (Lysianopsis) . . ..... 718 


page 
alberti (Paracallisoma) . .... 719 
albidar Mas) et. ae 440 
albida (Megamoera). . ... 2... 440 
aibidne (ABBmyX) . (2... 00% 75 
albidus (Gammarus). . ». ..... 440 
albidus (Hoplonyx) . . » .».... 75 
albidus (Tmetonyx). ...... 75 
albinus (Gammarus) . . .. 2... 455 
albinus (Ommatogammarus). . . 455 
albomaculata (Amphithoe) . . . 639, 642 
albula (Gammarus flori var.). . . . 496 
albulus (Heterogammarus) . . . 496 
albus (Acanthogammarus). . . . 784 
albus (Anonyz) . :.::..., 85 
albus (Polyacanthus) . ...... 734 
alderii (Metopa). . .» : . 2... 175 
älderü (Metopa) .. :. 2220. 182 
alderii (Montagua) . . 2 2... 175 
alderi (Megamoera) . . ı..... 426 
älderi (Metopa). . ..:.... 175, 176 
alderi (Probolium) . . .» :. . FTIR 
alderi (Stenothoe). -. .». 2.2. .% 175 
alexandri (Constantia branickii var.) 894 
algensis (Cancer) . . ..... 2-24 028 
algensis (Lusyta) . .. . . a 3; 
algensis (Lysita) . : -» 2232. 715 
algicola (Bianeolina) . » »..:.. 647 
algicola (Mierodeutopus). . .» . . » 593 
algicola (Neobule): . . 2 2... 556 
algicola (Neobule (Hyale)). . .-. . 556 
AEDrotUE . 50. BEE NER 85 
alicei (Cyphocaris) : . 2 :..'5» 717 
Bone... ER 63 
Allorehestes =. 3 0.0 8 Wed 559 
MHorchestes. :-. »:.. E00. /.2% 581 
Miorchesiiua +2... Es 39 787 
alluaudi (Amphithoe) . . .» . . . . 738 
alluaudi (Ampithoe). . .... . 788 
alluaudi (Talitrus). . . .. 525, 735 
altamarina (Kroyera) : . ..... 240 
altamarinus (Pontocrates) . . . . 240 
Amanonyz RR HFIENN 787 
BENaryilis Hs A 23 
Amathia . - ... a a a 886 
Anathllls. ...., si 3 ER 
Minashilline 2... SRH DEE 499 
Anathillinella : ... 2 .1072%7202.227 208 
Mmashrillopsis....., NV eg 384 
amaurus (Anonyx) : . :...x 85 
Biabesiar. EHE 51,719 
ambigua (Iphimedia) . . .:... 213 
ambigua (Panoploea) . . .... 218 
amblyops (Ampelisca). . . . 105,722 
amblyops (Normanion). . . ...» . 42 
amblyops (Orchomene) . . . . . 46 
ambulans (Orangonyx). : » ». .» - 369 


ambulans (Gammarus). . .» ... .» 369 


na 


Alphabetical Index 


page 

ambulans (Goplana). : : » . ..... 869 
ambulans (Synurella) . . . . . . 369 
amethystinus (Gammarus) . . . . - 456 
amethystinus (Ommatogammarus) 456 
amoena (Melita). . . »...... 426 
Ampelisca ..... : . 98, 722 
Rmpoelisesäds 53 usw. 97 
Ampelisecaidae. .... re 
Ampeliseidae. : .:..: ..... 97. 
Ampeliseides. ;, .: @u2..0% 97 
BEDehHacinE 3a 97 
Bapeliscinde u un Di 97 
Ampeliseinf „ra 97 
melisin = 7 4... dr eh 98 
‚ Amphilochidae. ....... 148 
mphilochinsae. &:'.% 2.34 148 
Amphiloehoides. . : .: .. . 152, 723 
Amphiloehus : +... 8.35% 149, 723 
Bmphipoda ı .'..234%:827 ö 1 


Amphipoda Gammarina ... . 5 


N BE Er ee 7 512, 631 
=Aamphithoidae 4 . ., 2.%% . 681 
Amphithoides. .. .. » an 
Amphithonotus . . . : 22... 514 
mphithopeis.z ...:: wir sid, 289 
Amphithopsis. . . . . 295, 304, 811, 817 
ar 632 
uhitonotum-: >"... 4. en 514 
N RE Ve 787 
MERERIBOB 4-3: 3.4: 631, 738 
Ampitholdab. Ya er 631 
ee VE ER Er ae yet 98 
ampulla (AnonyxX). . ». :... 54,77 
ampulla (Aspidopleurus) a ..9 
ampulla (Cancer) . : : 2.2.2... 08 
ampulla (Cancer (Gammarellus)) . . 89 
ampulla (Gammarus) . . 2». ... 89 
ampulla (Lysianassa) ....... 89 
ampulla (Phippsia) . ...... 89 
ampulla (Stegocephalus) .. .. . 89, 91 
ampulloides (Anonyx). .. :.. 55 
Anamizidse, : „30%. 170 
BaniKie 22, 170, 724 
‚andamanense (Cyrtophium). . : . . 702 
andamanensis (Podocerus) . . . 702 
Bmdahla. = . euere .. 92,9 
Andale eier teisn 93 
HARRIS», :. 6 es 94 
Raameden- une d 96 
BHIANIOBEIR NG. 2 yet 92 
Andaniotes . ... . gr, 96 
andina (Amphithoe). . ...... 578 
andına (Hyalella).-.. .....: 578 
andrusowi (Atylus) -. -...... 331 
andrussowi (Gammarus) 469 
anguipes (Ischyrocerus) . . .. . » 654 
anguipes (Ischyrocerus). . .. - 658 


745 

page 
anguipes (Podocerus) -. . . . - 651, 658 
angulata (Tryphosa). . ... . 270 
angulata (Tryphosella). . ... .. 70 
angulatus (Anonyx) . : 2. .... 70 
angulosa (Amathilla) . ...... 387 
angulosus (Gammarellus) . . . » 387 
angulosus (Gammarus). . . ».. . 387 
angustifrons (Synopia) . ... . 272 
angustus (Allorchestes) . . . : . 584 
angvipes (Ischyrocerus) . . ». » . 658 
anisochir (Gammarus) . . .» ».» . 423 
anisochir (Maera) . . 2 2.... 423 
anisochir (Melita). . 2 ...:. 423 
De a ERTL Si 642 
anisopus (Amphithöe (Amphitonotus)) 517 
anisopus (Dexamine) : . ... . 517 
annulatus (Anonyx). . . .: ... 86 
annulatus (Gammarus) . : . . . 463 
anomala (Ampelisca) . . .... 106 
anomala (Ampelisca) .»..... 722 
anomala (Autonoe) . . .»... 2... 591 
anomala (Halicoides) .. . ... . 221 
anomala (Orchestia). : - .» -. . 735 
anomalus (Amphilochus). . . . . . 723 
anomalus (Gammarus). - :.»... 591 
anomalus (Gammarus (Gammaropsis)) 591 
anomalus (Haliceoides). : . .. : 221 
anomalus (Microdeuteropus) . . . . 591 
anomalus (Microdeutopus) . . . 591 
anomalus (Microdeutopus) . . . 593,593 
BHONYX 2:5. TE 53 
ISBN. 2 0.202 0 SEHEN Ei 56 
anonyx (Cyphocaris) . . .... 29 
antarctica (Dexamine). »..:..:. 520 
antaretica (Leucothoe) . . .. . 168 
antarctica (Polycheria) . .. . . 520 
antarctica (Tritaeta). - - » .. >. 520 
antareticus (Atylus) . . .».. 520, 728 
antareticus (Eusirus) - . : . . . 340 
antarcticus (Eusirus euspidatus var.) 340 
antennaria (Harpinia). . . .-. . 143 
äntennatus (Crangonyx) - . . . +» - 390 
antennatus (Eucrangonyx). . 390, 731 
antennatus (Niphargus) . . :.. . 731 
antennipotens (Anonyx) » » ... 64 
antennipotens (Pseudotryphosa). . . 64 
antennipotens (Tryphosa) . . .. . 64 
antennipotens (Tryphosella) . .. . 64 
antennulariae (Stenothoe) - . . . 195 
antiqua (Apherusa) : . : -:... 727 
antiqua (Phaedra)..: .:» 2... 727 
nt RT ET ar N 587 
IEBEERBS er 585, 736 
BREPBEOBB SS BEER 586 
IEBHAFRBR 5 25er 304, 727 
BDOBEAHEONYZ..: : 22. SE 370 


appendiculata (Lysianassa). . :.. 54 


746 Alphabetical Index 

page page 
appendiculata (Melita) . ... . 428 | armata (Stimpsonella) ....... 589 
appendiculata (Tritropis). . . - . » 347 | armata (Talorchestia) . .... . . 547 
appendieulatus (Ceradocus). . . . - 428 | armata (Thalorchestia). . . » ... 547 


appendieulatus (Cleonardo) . . . 347 
appendieulatus (Gammarus) . . . . 428 


appendiculatus (Maera) . ...». 428 
appendiculosa (Lysianassa). . . . . 54 
appendieulosus (Anonyx). . . . . . 54 
approximans (Moe) . ...... 741 
aquaticus (Gammarus) . . . 2... 474 
aquilex (Niphargus). . . .... 406 
aquilex (Niphargus). ...».... 410 
aquilina (Amphithoe) . . ..... 565 
adullina IHyvaloy.. 2.10. 565 
aralensis (Gammarus) . . » 2... 459 
aralocaspius (Gammarus). . . .» .» . 458 
araneolus (Gammarus) . » -» 2...» . 479 


araneolus (Poekilogammarus) . . 479 
araneolus var. ephippiatus (Gammarus) 479 
araneolus var. quinquefaseiatus (Gam- 


a a 479 
IEEBROBE ee a ET 98 
aretica (Autonoe) . » 2... 2n% 595 
arctiea (DBulichia) 2:23.75 5 710 
arctica (Gitanopsis) . . . .. -.- 155 
arcticus (Gammarus). . : 2... 476 
arcticus (Lembos). . . . »... 595 
arctieus (Menigrates) . - »... . 49 
aretieus. (Mierodeutopus). . » . » - 595 
arctieus (Örchomene) . . ..... 49 
aretieus (Pontocrates) . . . : . . 240 
arenaria (Amathilla). - ...... 387 
arenaria (Bellie). . . 2... 0% 125 
Aranaria (Krovea) 1. u... 241 
arenaria (Kroyera) . ..... 241, 242 
arenaria (Pterygocera).. . ... . 125 
arenarius (Cancer (Gammarellus)). . 387 
arenarius (Haustorius) . . .. . 125 
arenarius (Oniscus) . » 2... 125, 387 
arenarius (Pontocrates) . . . . . 241 
arenarius (Sulcator) . . » » 2»... 125 
arenatius (Oniseus) - » » » 2.2... 125 
arenatius (Suleator) .. . » .».. 125 
arenicola (Oediceros) . . . .. .. 239 
arenicola (Oedicerus) . -» - .».. . 239 
TEE FRE SE 276, 722 
ATrgisBidae „u een 722 
BTIBTERN 2 a a 28.308 4918 
armata (Dybowskia). . . .». 2... 735 
armata (Grimaldia) . . »... 163, 724 
armata (Hyalella) 0,7. 505152 577 
armata (Microcheles) -... ... . 214 
armata (Pontoporeia) . » -»... - 126 
armata (Priseilla) - . - . .. 2... 126 
armata (Priscillina) . . .. .... 126 
armata (Seba). . . . ...... 168,724 
axrmate. (Beba) . HH, u 724 


armata var. ongureni (Dybowskia) . 785 


armatum (Öyrtophium). . 2.2... 697 
armatum (Laetmatophilus) . . . . . 697 
armatus (Acanthogammarus) 511,735 
armatus (Allorchestes). . . . ...» 577 
armatus (Öeradoceus). » 2.2... 5ll 
armatus (Gammarus) . .. 2.2... 5ll 


armatus (Laetmatophilus). . . . 697 
armatus (Micerodeutopus) . . . . 589 


armorica (Amphithoe) .. .... - 557 
armoriea (Neobule) . . . . .... 557 
ET EEE TEN 248, 726 
articulata .(Leucothoe). . » .. . . 165 
articulosa. (Leucothoe) . . » . . 165, 167 
artieulosus (Astacus). . » » 2... 165 
artieulosus (Cancer) „ . » 2... 0.16 
artieulosus (Gammarus) » . ... . 165 


BETEN 
asper, (Acanthonotosoma) . . .» . . 375 


Aspera (MBeT3) - 2... 43a 440 
aspera (Megamoera). . .» 2...» . 440 
asper (Elasmopus). . . 2.2.2... 440 
asper (Gammarus). . » » . » . 375,440 
Aspidophüraia.i. m. 0 a 581 
Aspidopleurus. - . . . „=... 89, 90 
assimilis (Ampelisca) - ». » . .. ..107 
assimilis (Atyloides). . .. 2... 363 


assimilis (Cheirocratus) . . . . . 419 
assimilis (Gammarus). . » . ... . 419 


assimilis (Ischyrocerus) . . . - . 659 
assimilis (Neopleustes) . . - . . 314 
assimilis (Paramphithoe) . . . . » - 314 
assimilis (Podocerus) . .. 2... 659 
assimilis (Talitrus). . 2.2... 524 
RE Sn ae TE 278 
atchensis (Carinogammarus) . . 505 
atchensis (Gammarus) . . .:... 505 
atlantica (Acanthozone) . » .».. 302 
atlantica (Ambasia) . . .. . 719, 721 
atlantica (Gammaropsis) . » x... 6ll 
atlantica (Lysianassa) . » .» .. . 87,719 
“atlantiea (Protomedeia) .... . . 611 
atlantica. (Stenopleura) . . .. . 302 
atlanticus (Eurystheus) . . . . - 611 
atlantieus (Gammarus). . » 2... 719 
atolli (Polycheria). . . .»..... 735 
WEG AO N ne Ar 327 
m get 3 TE ER RR | 827 
AESTERER 255 re 827 


Atyiiden.:. 20m 
Aids er ee 
AUyIOBBIB=Er NE NER 299, 727 
Aviops 3. ee 
Atylas 7.2 Bart er 


VE ie a I nn 


Atylus 
aucklandiae (Orchestia) 
Audouinia 
audouiniana (Aristias) 
audouiniana (Lysianassa) 


audouiniana (Perrierella) . ... 41 
audouinianus (Aristias) . » .»... 50 
audouinianus (Lysianax). .. .. . 41 
audouinianus (Pararistias) . . . . . 41 
ee ee 737 
auratus (Stegocephaloides) 92 
auratus (Stegocephalus) . .. .. . 92 
aurita (Gmelinopsis) . .. .. . 415 
australiensis (Amphithoe) . .. . . 641 
australiensis (Ampithoe) R . 641 
australiensis (Lysianassa). . . . 87 
australis (Allorchestes). . . .. . . 581 
australis (Amathillopsis) 385 
australis (Ampelisca) . .. ... 104 
australis (Atyloides). . . ..:.. . 363 
australis (Atylus) - . -.2.... 363 
australis (Autonoe) . ....... 601 
australis (Chiltonia). .. .... 735 
australiis (Gammarus). . . . .. 733 
australis (Hyalella) .. ...... 735 
australis (Hyperiopsis) . . . . . 741 
Wustralıa tleilins) » 2: 2,05 % 707 
australis (Lemboides) . . . . . . 601 
Beate CMelltay v5... 52 =2..4-% 423 
australis (Mierodeuteropus). . . . . 601 
australis (Mierodeutopus) . . . . . 601 
australis (Paramoera) . ...... 363 
australis-{Pherusa) .:... .» ,..0%..., 297 
australis (Podocerus) . ». » 2... 654 
austrina (Paramoera) . . .... 363 
sustrinus (Atylus).. 2°. . ...0..% 363 
Aulonoe.. . . - , 587,588, 594, 610, 623 
aviculae (Chevalia) . . . 737 
avirostris (Rhachotropis). . -» . . . 349 
avirostris (Tritropis). - » .» ». ... 349 
Azelboeckia... , . „un 391, 731 
axeli (Pardaliscella). ...... 228 
azteca (Amphithoe) . . ... .». 575 
Bzteca (Hyalella) 4. ,=% 575 
aztecus (Amphitoe) -. . . 2. .».. 575 
babieus (Allorchestes). .-. . 2... 572 
babirussa (Allorchestes) . . . . . . 572 
babirussa (Amphithoe) . . .... 572 
babirussa (Hyale). . . ...... 572 
BAtOmE is en, 730, 731 
baeri (Cardiophilus). ...... 395 
baikalensis (Cancer)... ..... 376. 
baikali (Pallasea) ...... 378, 730 
Baikalogammarus. . . ..... 416 
»eird: (UF01606) 432: 2.2. 132 
bairdi (Neopleustes) . ..... 314 
bairdi (Paramphithoe) ... .... 3lt 


VE N a we) Luca Ark Fler Saar 


“0000. 


RER ae er ln ae ae Be MER) 


Alphabetical Index 


page 
. 328, 728 
535 


Pe Pe‘ 
se Sue. 
er 0 


747 

> page 

balkirii (Acanthogammarus). . . 734 
balkirii (Polyacanthus). .. ... . 734 
barbatipes (Anonyx). . ..»... 68 
barbatipes (Tryphosa) . . ... . . 68 
barbatipes (Tryphosella) 68 
barbimana (Haplocheira) : . . . 609 
barbimanum (Corophium) . . . . . 609 
“barbimanus (Gammarus). . ... . 609 
barbimanus (Haplocheira) . . . . . 609 
barbimanus (Leptocheirus). . . . . 609 
Bereniis: Saat 238 
barentsi (Paronesimus) . . . .. 43 
barilloni (Gammarus) . . . :... 481 
barretti (Apherusa) . . . ...». 308 
parretti {Pheräsa) , „. .. 1... 308 
barthelemyi (Callisoma) . . ... - 62 
bassi (Phoxocephalus) . . . . . 135 
Basti: [Phozub) 4: 2.82, 135 
Baten: so... nase, 355, 729 
Dabei LAteins)  . 1 292 
Bateldan. - . vasea ,5 00% 355 
batei (Halirages) . : -..... 292 
baisı (Masra): Sinn sus 436 
hateı (Moser). „unse tar 436 
batei (Orchomene) ....... 45 
batei (Phoxocephalus) . . . . .. » 146 
Dar EBEN. 2 2, 5% 146, 147 
batei (Podoceropsis) . » ».... 621 
Datei. {Acnoclea) - „u 2 22. 2% 621 
bathycephala (Amaryllis) . ... 2% 
bathycephalus (Amaryllis) . . .. . 24 
Bathymedon::. rs. 255 
BRENFONFE. 6.6: ann 729 
bathyplous (Camacho) . .... 665 
Batbyyores, 2... ee 119 
DBathyDoreia ea ar er 119 
beaucoudraii (Orchestia) 542 
beaucoudraü (Talitrus) . . ..:. 542 
behringanus (Acanthostepheia) . . . 726 


behringiensis (Acanthostepheia) 254, 


726 
behringiensis (Oedicerus) . .. . . 254 
ni, BEN en 124 
bellianus (Tetromatus). . ». .. .- 100 
berilloni (Echinogammarus) . . . 481 
berilloni (Gammarus) . . .. . - 481 
Dlancoune ae 646 
bicaudata (Cymothoa) . .... . .- 686 
bieaudatum (Corophium). ... . - 686 
bieaudatus (Oniseus) . .». .....- 686 
bieuspis (Acanthozone) . .... . 320 
bieuspis (Amphithoe) . . . . - 313, 642 
bieuspis (Amphithopsis) . . . 313 
bieuspis (Neopleustes) . .. . - 313 
bieuspis (Paramphithoe) . . . .. - 3l3 
bieuspis (Pherusa) 304 
bieuspis. (Pleustes) .... . 00.7. 313 


748 Alphabetical Index 

page page 
bieuspis (Syrrho@). . »» .....: 276 | bonnieri (Talitroides) . . . . - - 527 
bidens (Cerapus) . : 2.2... 741 | borawkii var. diehrou (Gammarus) . 738 
bidens (Eriethonius). : . . . ..» - 671 | borealis. (Apherusa) . . . »...5. 304 
bidens: (Kusirus). . 3:72:74 2.208 341 | borealis (Ceradoeus). : » . .: =»: 336 
bidentatum (Corophium). : . : . »- 689 | borealis (Halirages) . . :» :.:.. 304 
bidentatus (Hippomedon) . . : . 719 | borealis (Kerguelenia) . . . . . 12 
bidentatus (Mierodeuteropus) . . . . 599 | borealis (Melphidippa) . . : . . 336 
bidenticulata (Lysianassa) : . . : : 56 | borealis (Metopa). :» » » 2... 178 
bidentieulatus (Anonyx) . ......: 56 | borealis (Metopa) . : : .. !. . 180 
bidentieulatus (Ichnopus) . . . » : 56  borealis (Monoculodes) . . .. . 262 
bidenticulatus (Socarnes) -. . - . 56 | borealis (Oediceros). . -» » . . . 244 
bifasciatus (Gammarus) . .: ..» - 496 | boreus (Gammarus) . » 2.2... 476 
bifasceiatus (Heterogammarus) . . 496 | borodini (Niphargoides).. . : . . 453 
bifureus (Crangonyx) : . . : 373,730 | borowskii (Ceradoeus) . : » .» 2... 48 
bifureus (Niphargus) . . : : .. - 730 | borowskii (Gammarus). : . 2»... - 498 
Bircanna ans Er 205 | borowskii (Parapallasea) . . 498,733 
biscayensis (Eusirus) . . : : . - 8342 | borowskii (Pleuracanthus) . . . . » 733 
bispinimanus (Eurystheus) . . . . . 618 | borowskii subvar. abyssalis (Gammarus) 498 
bispinosa (Acanthozone). . - .. » 305 | borowskii var. abyssalis (Pleuracanthus) 733 
bispinosa (Amphilochus). . .. . . 154 | borowskii var. dichraas (Pleuracanthus) 733 
bispinosa (Apherusa) . ..... 305 , borowskii var. dichrous (Gammarus) 498,733 
bispinosa (Dexamine) . ..... - B06 |: Bernie: . . ia wre 367 
bispinosa (Gitanopsis). . - : - - 15:1 Bela 2 789 
bispinosa (Liljeborgia) . - -. - . 234 | bosphorana (Stenothoe) . . . . - 198. 
bispinosa (Lysianassa) . . ... 38 | bottae (Orchestia). . : . 2... 534 
bispinosa (Pherusa) . . . ::... 805 | bottae (Orchestia): . : u. 3... 542 
bispinosus (Amphilochus) . » . . . 154 | bottae var. feminaeformis (Orchestia) 534 
bispinosus (Atylus), . : : 2» .... 306 | Böuvierella - . ae du. 727 
bispinosus (Gammarus) . » :.». 234 | bouvieri (Pseudotiron) . : . . :» 284 
bispinosus (Halirages) . . .: . . . 005 1 Bevallie. ; san. iR 357 
bispinosus (Liljeborgia) . . -» -. . - 234 | bowersii (Crangonyx). ... . .- 729 
bispinosus (Lysianax) . ». » 2... 38 | brachyceras (Ampelisca) . . . . 722 
blanchardi (Moera) . ....... 435 | brachycereus (Anonyx) . „:... 48 
blossevilliana (Dexamine). . . . 517 | Brachyuropus. . . ::...2.. 392 
ee EEE EREN FPEE EINE 391,625 | branchialis (Gammarus) . .... . 497 
boecki (Amphithoe). . ..».... 741 | branchialis (Heterogammarus). . 497 
boecki (Andania) . . . .. 2... 85 |, Branchiößastta . . . . .-...“ 1 
boeckii (Amphilochoideß) . :. : 152 | Bfandtia. . . ... 20.8 395 
boeckii (Amphiloehus). . . . .. . 150 | brandtii (Ceradoceus). . : ...». 379 
boeckii (Elasmopus) . -. : » . . 445 | brandtii (Dybowskia) . »..... 730 
boecküi (Maera). .. ... . . 0. 445 | brandtii (Gammarus) . . . 2... 379 
boeckii (Megamoera) . ... : .... 445 | brandtii (Pallasea) . :.: . 379,730 
boeckii (Metopa) . . ...... 178 | branickii (Callisoma) . : »....- 62 
boeckii (Neopleustes) . . . : . . 312 | branickii (Constantia) . » : »... 394 
boeckii (Paramphithoe) . . . . . : 812 | branickii (Costantia). : » :.... 394 
boeckii (Pardalisca) .. : : . . 228,228 | branickii (Maeroheetopus). -. . . 394 
boeckii (Pardaliscella). . . . . . 228 | branickii var. alexandri (Constantia) 394 
boeckii (Stegocephalus) . . . . . . 95 | brasiliense (Platophium) . . 698, 701, 703, 
boecki (Parandania). . : ....: 95 703, 704 
bolivari (Podoprion). - - . . » : 18 | brasiliensis (Amphithoe) .. . . . » 637 
bonelli (Gorophium). . » . . - 686, 691 | brasiliensis (Ampithoe) . : . - - 637 
bonellii (Corophia) . » » 2... 691 | brasiliensis (Cerapus) . . ».».. 671 
bonellii (Corophium) . . .. .. 691 | brasiliensis (Elasmopus): . : . - 443. 
bonellii (Corophium) : .. . . 691, 692 | brasiliensis (Eriethonius) . . 671,740 
bonnellü (Corophium) . . ..»:.. 692 | brasiliensis (Gammarella). . ... . 443 
Böhnierella .. . .. . . #4»: 2% 737 | brasiliensis (Gammarus) . » .» - . . 443 
bonnieri (Socarnella) . ..... 719 | brasiliensis (Lysianassa) . .- . 87 


ee ER ER AEVHT IERENER 
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Alphabetical Index 


page 
brasiliensis (Moera) . . - »... . 443 
brasiliensis (Orchestia (Talitrus)) . . 529 
brasiliensis (Orchestoidea) 529 
brasiliensis (Podocerus). -. . . - 704 
brasiliensis (Pyetilus) . . . .».. » 671 
 brazieri (Colomastix) . .. .. . 206 
breviatus (Sceopelocheirus) . . . - - 62 
brevicalcar (Halimedon) . . 249, 250, 252 
brevicalear (Oediceros) . . . » . . 249 
brevicalcar (Westwoodilla) . 249 
brevicarpa (Kroyera) . ...... 242 
brevicarpum (Synchelidium) . . . . 242 
'brevicaudata (Gammarella). . . . . 449 
brevicaudata (Maera) . . ..... 444 
brevicaudata (Megamoera) . . . . . 414 
brevicaudata (Photis) . . . . . - 606 
brevicaudatus (Gammarus) . . . 444,449 
brevicaudatus (Onisimus) . . . . 27 
brevicaudatus (Onisimus). . . .. - 28 
brevicaudus (Gammarus). . ... - 449 
brevicornis (Allorchestes) . . . . 584 
brevieornis (Amaryllis) ...... 24 
brevicornis (Ampelisca) . . . . . 100 
brevieornis (Ampelisca) . . . . 101,103 
brevicornis (Araneops). :. .» . . .» 100 
brevicornis (Cheirocratus) . . . . - 418 
brevicornis (Gammarus) . . -» . . - 231 
brevicornis (Ischyrocerus). . . 661 


brevicornis (Liljeborgia) . . . . 281 


brevicornis (Neopleustes). . . . 313 
brevicornis (Nicea perieri var.). . . 570 
brevicornis (Dediceropsis). . . . 253 
brevieornis (Oediceros) . » ... - 253 
#brevicornis (Orchestia). . . » .. . 547 
brevieornis (Paramphithoö). . . . . 313 
brevieornis (Podocerus) . . . . » . 661 
brevieornis (Polycheria) . . ... » 520 
brevicornis (Stenothoe) . . .. . 199 
brevicornis (Talitrus) . . ..... 547 


brevicornis (Urothoe) . . . ... 131 
"brevidigitata (Leucothoe) . . . . 167 


brevidigitata (Orchestia) ... .. . 532 
brevipes (Amphithoe) ....... 637 
'brevipes (Ampithoe) . ..... 637 
»Szevipes (Hyale) .. . . . .., 1735 
brevirostris (Cyproidia) -. . -» - - . 160 
'brevirostris (Peltocoxa) . . . 160, 723 
brevirostris (Stegoplax) . » ... »- 723 
brevitarsis (Amphithoe) . . .. . 817 
‚brevitarsis (Dexamine). ..... . 517 
brito (Orchestoidea). ...... . 735 
'brito (Talorchestia) . .. . . 552, 735 
cc kAnonyz). : . ii. 86 
ET 439 
"brunneus (Amphilochus) . . 151,723 
‘brusinae (Amphithoe) „...... 641 
‘brusinae (Ampithoe) . ..... 641 


749 
page 
a 274 
BERSDHRBR : va ee 739 
Dauzelii (Anony8) . :..7..,0... 2% 74 
Beam (Bars) 2:0 741 
bruzelii (Metopa) . . . 174,178, 188, 189 
bruzelii (Montagua) . . ...... 188 
bruzelii (Proboloides) . . .. . . 188 
buechichi (Hyale). . .. . 572 
Buechichi {Nieea) . 17. ,2, 72, , 572 
buchholzi (Acanthozone). . . . . . 324 
buchholzi (Paramphithoe) . . . . 324 
wubls Sn en ı1l 
cabanisii (Acanthogammarus) 509, 734 
cabanisii (Ctenacanthus) . . . . . . 7 
eabanisii (Gammarus) . ...... 509 
caecula (Westwoodia) . . .... . 250 
caecula (Westwoodilla) . . . . . 250 
eaeculus (Hoplonyx). ....... 76 
caeculus (Tmetonyx) . ..... 76 
eaeculus (Westwoodea) . . .. . . 250 
Gaacus (Andayz) . 5.8.2 2% 66 
eaerulea (Amphithopsis) . . . . - - 295 
eserulea (Pheruss) . ....... 295 
ceaeruleus (Paraleptamphopus). . 295 
eaesaris (Eusiroides). . - 345, 346, 3416 
calamicola (Cerapus) 669, 740 
ealamicola (Cyrtophium) . . .. . . 669 
eslcarata (Metope): :. . ... „.. 189 
ealcaratum (Probolium) . .... . 189 
ealcaratus (Anonyx). -. » 2...» 65 
ealcaratus (Centromedon) . . . . 65 
calcaratus (Gammarus). . . 457,457, 487, 
489, 491, 492, 493, 493 
ealcaratus (Ischyrocerus (Podocerus)) 654 
ealcaratus (Odontogammarus) . . 457 
ealcaratus (Podocerus). . . .. . - 654 
ealcaratus (Proboloides). . . . . 189 
ealceolatus (Ichnopus). . - .». . - 52 
ealiforniana (Megalorchestia) . . . . 528 


ealiforniana (Orchestoidea) . . . 528 


ealifornianus (Megalorchestes) 528 
californiea (Jassa). . . . .. .. 656 
ealifornieus (Podocerus) . . . .. - 656 
ealiforniensis (Orchestia). . . . - - 741 
0 A 149 
N 295 
Galliopiidae ....... 285, 727 
en We 295 
ne 37,61 
BEMBORO 7:7, ee nen 664 
eambriensis (Lembos) . - . » .. . 591 
campbelliea (Allorchestes) . . . . - 562 
eampbellica (Hyale). . . .... 562 
camphylops (Gammarus). . .». .: . . 476 
camptolops (Gammarus) . . .. . . 476 


eamptonyx (Hyale) . . . . . 570,736 
camptonyx (Nicea) 


Frl rn a Year MEET Sa 


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750 Alphabetical Index 

2089 page 
eampylops (Gammarus) 473,476 | carinatus (Gammarus) . .. . - 328, 387 
camylops (Gammarus) ..... 476 | earinatus (Monoculodes) . . . . 261 
eancella (Amphithoe) . ...... 376 | carinatus (Monoeulodes) . . . .. . 263 
eancelloides (Dybowskia) . . .» . . 730 | carinatus (Odius) -. ».... 2... .... 211 
cancelloides (Gammarus). . . . 377,380 | earinatus (Onesimoides). . . . - 32 
cancelloides (Pallasea) 380,780 | carinater (Otum).. "2, , 2 5 211 


IR): 22.0 0 a Ba en 377 
eancellus (Amphithoe). .. ... 376 
eancellus (Cancer (Gammarellus)) . . 376 
eancellus (Cancer (Gammarus)). . : 376 
eancellus (Dybowskia). . . ... 730 
eancellus (Gammarus) . . . . - ee Ye 
eancellus (Öniscus) . : ...... 376 
cancellus (Pallasea) . . . - - 376, 730 


cancellus (Pallasea) 377, 377,378, 380, 509 
eancellus var. gerstfeldtii (Dybowskia) 730 
cancellus var. gerstfeldtii (Gammarus) 377 


N BE NEAR FOT 460 
canus (Gammarus viridis var.) . . . 484 
eapellus (Gammarus) . ». ..... 495 
capellus (Heterogammarus) . . . 495 
ehpensis (Alylus) : ©... 361 
eapensis (Iphimedia) . . .. . 361 
capensis (Orchestia) . ..... 537 
eapensis (Pontogeneia) . . . . . 361 
capillata (Janassa) ;. 4... 2.5 649 
eapillale (insel. 2. 649 
capillatus (Podocerus) .. ..»... 649 
ceapreolus (Echinogammarus) . . 488 
capreolus (Gammarus). . ..... 488 
eapreolus var. chloris (Gammarus) . 488 
CAraInIca BYDNOPIN) . : . ....% 273 
carcinophila (Bouvierella). . . . 727 
earecinophila (Paramphithoe) . . . . 287 
earceinophilus (Laothoes) 287,727 
KERGBRIO. 2 ee ee 125 
ERFRBIER 2 er 125 
GardiopBllus: „.,.3:..3427, 22% 395 
earicus (Onisimus) . . ..... 27 
Dandophilus 2: 3:01.20 395 
carinata (Amathia) . . . . . . 887,388 
earinata (Amathilla).. . ..... 388 
carinata (Ampelisca). ...... . 109 
carinata (Amphithoe) . ...... 328 
carinata (Haploops). .-...... 117 
earinata (Harpinia) .. ...... 144 
Carinata IHyBlo) 2... 561 
carinata (Iphimedia) . .:.... 212 
carinata (Kröyera) . .....». 261 
carinata (Metopa) . :. ...... 184 
carinata (Metopella) . ..... 184 
earinata (Paramphithoe). ... . . 828 
carinatum (Lepidepeecreum) . . . . 80 
carinatus (Allorchestes) .. . . . . 561 
carinatus (Atylus).-4::..2%:.% 328 


carinatus (Gammarellus) . . . . 388 


earinatus (Westwoodea) . . .» .» - . 261 


Carinogammarus . ..... 501, 734 
carinospinosa (Amathia) . . . . 887,387 
carneolus (Gammarus). . . ... . 456 
carneolus (Ommatogammarus). . 456 
Girolobaten. 2 4 2, Sr 252 
carpenterii (Axelboeckia) . . 392, 731 
earpenterii (Otenacanthus) . . . . » 731 
earpenterii (Gammarus) . . .... 392 
casparianus (Niphargus) . . . . 409 
easpary (Gammarus). . . ..».. 409 
casparyi (Niphargus) . : . .»... 731 
caspary (Niphargus) . . . . 409,731 
caspius (Carinogammarus) . . . 504 
caspius (Gammaracanthus) . . .. 508 
easpius (Gammarus). . ... . 459, 504 
caspius (Niphargoides) . . . . . 450 
esspius (Niphargms). 25... 1..2.0..% 450 
vaspius (Onesimüs) . ....:. 42% 34 
oaspins (Oniseus) - =. „irn. 504 


easpius (Pseudalibrotus) . . . . 34 
cataphracta (Parampbithoe) . . . . 310 
cataphractus (Amphithonotus) . 310, 310 


cataphractus (Pleustes) . . . . . 310 
cataphractus (Rhachotropis) . . . . 810 
cataphractus (Tritropis) . . . . . . 310 
eatharinensis (Batea) . . .... 355 
eattai (Stenothoe) . . . ».... 195 
caudadentata (Noenia). .. ... 621 
caudisetus (Gammarus) . .. . . 512 
caudisetus (Hyperia). . ...... 512. 
cavimana (Orchestia) -. . . .... 534 
cavimanus (Örchomene) . . .. . . 85. 
ET 554 
Centromedon . .... . > 65, 720 
ÜSradOBUBS: . 2400 ne 430 
Deapodmn 2.4 665 
‚GerapopBi 13 Zi sw. 674 
GOPBDUS. 2... 0 ann 665 
ceratinus (Lysianax). . - ».... 39 
challengeri (Cyphocaris) . ... 29 
chalubinskii (Lada)... ..... 741 
Duarbolin 2.30 wa eg 718 
chauseica (Lysianassa) ..... 87 
chauseieus (Alibrotus). . . ... . 87 
Cheizmedon: . 22082533 66, 720 
Cheiripnoflsa: : 235 2.2 4004. 
Chelroasa . - - . . wa 234 
Chalrboratan in. 417 


chelatus (Buonys); »  ..4:....:..7218 
chelatus (Lembos) 


Fl 20  TIOREEr SAB Au Dee ee 1 


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Alphabetical Index 751 

i page page 

chelatus (Phoxocephalus) . . . . . 139 | einerea (Amphithoe). . ...... 634 
chelieorne (Corophium) . . . . . 687 | einerea (Ampithoe) . . ..... 634 
chelifera (Audulla) . ...... 737 | einghalensis (Lysianassa) . . . 39,718 
chelifera (Stimpsonella) . . . . . - ' 589 | einghalensis (Lysianax) . . .. - 39, 718 
ehelifera (Stimpsonia) - » .» - »- - 589 | einnamomeus (Carinogammarus) 502 
ehelifer (Mierodeuteropus) . . . . » 591 | einnamomeus (Gammarus) . . . . - 502 
chelifer (Microdeutopus) . . . . 589 | eireinnatus (Amphithoe) . . .... 512 
chelifer (Mierodeutopus) . . . .» . » 591 | eireinnatus (Elasmopus) . . .». .» . 512 
cheloniae (Platophium) .. .. . - 701 | eireinnatus (Gammarus). ... . 512 
cheloniae (Podocerus). . . . . » 701 | eirrus (Apherusa). . . 2.2... 304 
ehelonophilum (Cyrtophium) . . . . 703 | eirrus (Pherusa) .. . 2.2.2... 304 
chelonophilum (Platophium) . 701,708, 741 | Cleippides . .:... 2... .. 300 
ehelönophilus (Podocerus) . . . - - 701] Oleonarda: 3.2, 2 2 346 
chelonophilus (Podocerus). . 703,741 | elevei (Apherusa) - .. ..... 727 
FR ar Se a a ya 693 | eloquetii (Örchestia) . -» » » 2...» 526 
BR tIaaer in 693 | eloquetiüTalitrus) . . . .» ... 526 
Brut ne en 693 | eloquetüi (Thalitrus) . .».».... 526 
Chevalia : :. ... .. rn 787.| eloquettü (Orchestis) +... .. ...% 526 
chevreuxi (Ampelisca) . . . . - 722 | elypeata (Leucothoe) . . . .... 175 
chevreuxi (Orchestia) . . . -. » . 533 | elypeata (Metopa). .... . 175, 724 
chevreuxi (Orchomenopsis) . . . 721 | elypeata (Metopa). . ». .». 2.2... 177 
Breakins na en 669 | elypeata (Metopina). ....... 724 
ehilensis (Amphithoe) . . . ... . 641 | elypeata (Montagua) ..... 175, 724 
ehilensis (Amphitoe) . .»..».... 641 | elypeata (Stenothoe) 195, 725 
ehilensis (Ampithoe) . . . - . . 641 | elypeata (Stenothoe) . . .. .- 725 
ehilensis (Aunonyx) . ....... 84 | elypeata (Sthenometopa) .... . 724 
chilensis (Gammarus) . . . -. . . 5l2 | elypeatum (Lepidepecereum) . . 79, 720 
chilensis (Orchestia) . . 531, 532, 536, 537, | elypeatus (Proboloides) . ... . . 725 
539, 542, 552,552 | elypeatus (Stenothoe) . . . . . 195, 725 

ehilensis (Talitrus) . . -.....: 527 | eoalita (&uernea) . ..... 521, 735 
ehiliensis (Orchestia) . . . . . - 5387 | coalita (Guernea) . . » .» 2... 522 
ehiliensis (Orchestia). . . . ... .» 552 | coalita (Helleria) . «x 2»... .. 521 
loHias 2 555, 735 | eoelochir (Lysianassa) . . . - - 718 
ehiltoni (Ampelisca). . . ... . 102 | eoelochir (Lysianax) . . .» :... 718 
ehiltoni (Eurystheus) . . ... . 617 | eoheres (Valettia) - - - . ...» .- 22 
ehiltoni (Gammaropsis) . ». » . . . 617 | eolletti (Siphonoecetes) . . . 683,740 
ORakont (kryvaleyı. 2.12 2 2.258,2785:1: Golomastidae- .... ......2% 206 
ehiltoni (Iphinotus) . . ». » » ... 204 | Colomastigidae . .... . . 206 
ohiltoni (Maera).. . 2.2... ee 206 
nn er Br PER 276 | ecolumbiae (Aoroides) . . .. . » 586 
Chironesimus. . ».... 2... 72 | comes: (Atylus) ... -... 2. .% 741 
Ohlorist 7:7 25 00 een e 883,383 | commensalis (Aristias) . .. . . 50 
chloris (Gammarus capreolus var.) . 488 | commensalis (Ischyrocerus) . . 739 
ICHOBIOON 4 Haan ana ee 287 | commensalis (Leucothoe) . . . . 166 
christianiensis (Stegocephaloides) 92 | ecompaeta (Ampelisca), . . .. . 109 
christianiensis (Stegocephalus) . . . 92 | compaeta (Kerguelenia). . . . - 12 
eicada (Anonyx) . . . . 74,75,76,76,76 | compaeta (Metopa) . .- :.»... 186 
cieada (Hoplonyz) : -. .,.... 74 | compaectus (Crangonyx) -. » .: : - » 369 
cieada (Oniseus) . .. . . ‘ 74 | compactus (Metopoides). . . - . 186 
cicada (PFmetonyx) . . »..... 74 | compactus (Niphargoides). . . . 451 
eicadoides (AnonyX) . ».. 2... 75 | eompactus (Paracrangonyx).. . . 369 
eicadoides (Tmetonyx) . . .. . 75 | compressa (Allorchestes). . . . . - 581 
eiliata (Lysianassa) . -.. . »... 50 | compressa (Ampelisca) . . . . . 722 
eiliata (Orchomenella) . ..... 81 | compressa (Amphithoe) . ... .. 330 
eiliata (Tryphosa). . . . ». 2... 81 | compressa (Darwinia) . . 2. .... 208 
einderella (Halimedon) . ....._ 269 | compressa (Parampbithoe) . . . . - 330 


einderella (Oediceroides) . . . . 269 


compressa (Tryphosa) 


752 

page 
compressa (Tryphosella) . .... . 71 
eompressus (Allorchestes). . . . 581 
eompressus (Atylus). . . -» .... 330 
compressus (Darwinea). . .... 208 
compressus (Gammarus) 465 
eompta (Amphithoe) ....... 645 
compta (Grubia) . : .. 2... 739 
eomptus (Amphithoides) 645, 739 
Bisnohalentee a urn en 663 
eoneinna (Amphilochus) . .... » 150 
eonfervicola. (Maera) . ...... 428 
eonfervicola (Melita) . . .... 428 
eonfervicolus (Gammarus) . ». . » . 428 
eonfervicolus (Melita) . ». ..... 428 
conformata (Sunamphitho&) 645 
conformata (Sunamphitoe) . .» . » 645 
eonformata (Synamphithoe) . . 645 
eonformatus (Sunamphitoe). . . . - 645 
eoniger (Epimeria) . »...... 322 
eonsanguinea (Liljeborgia) 232 
eonspicua (Epimeria) . ». »:... 322 
eonspieua (Oediceroides). . .. . - 268 
N N 394 
eonstantinopolitanus (Ischyrocerus) . 653 
eonstrieta (Orchestia) . . . .. » 542 
constructa (Orchestia) . . .» . - 2 542 
eontractum (Corophium) . . . . 692 

coogeensis (Allorchestes crassicornis 
N N .- DB 
eookii (Talorchestia) . .... . 554 
cookii (Thalorchestia) . .. ... . 554 
cooki (Orchestia) . . . . - : 554 
eorallina (Iphimedia) . ...... 212 
- eorallinus. (Atylus) . .»....x» « 515 
eorallinus (Gammarus fasciatus) . . 432 
KIOEBRDHB a ee 736 


eornigera (Epimeria) . . . . . 321,322 


eornigera (Epimeria) . . .. . . 323 
eorniger (Cancer (Gammarellus)) . . 823 
eorniger (Cancer (Gammarus)) . . . 823 
corniger (Gammarus) . x»... 8323 


eornigerum (Acanthonotosoma) . 322, 322, 
, 823 


ceornuaurei (Leptocheirus) . . . 626 
eornutus (Megamphopus) . . . . 621 
Doromarn Deren: . 662 
eoroninii (Melita) -. .: ..... 424 
Bnaröphis: 2. 2 ee 
Barayhiase N, . . 662 
BRorophiidee: ..:.:..:.. . : . 668, 739 
Brophiyn 2:2.) ,.8:437. 25 DB, 740 
Corophrium . ..... A | 


corpulentus (Andaniotes) . . - . 8% 
eorpulentus (Anonyxz) . ». » 2» 2...8 


eorpulentus (Niphargoides) . 451 
costae (Atylus) . ra WR wei 
costae (yasni N R 38 


Alphabetical Index 


page 
eostae (Lysianassa) -. . » 2... 40 
N a 394 
costata (Amphithoe). . ....». 741 
costata (Gmelina). . .. . a a 
eatesi (Malta)... Guss a 423 
eranchii (Vertumnus) . .» » 2»... 323 
2 367 
FBBDEONTX: 2 eek 370, 729 
seasss (Pyproidig) 4. .4ngasniung a 157 
erassicorne (Corophium) 690 
erassicornis (Allorchestes) . . . . . 568 
erassicornis (Amphithoe) .... . 644 
erassicornis (Byblis) .. .... 114 
erassicornis (Cerapus) . . . . . 666 
erassicornis (Grubia) 636, 641, 641, 641, 
642, 642, 643, 645, 645 
erassicornis (Grubia) . . . . .. 644 
erassicornis (Hyale).. ..... 568 
erassicornis (Örchestia) -. .. ..» . 540 
erassicornis (Siphonocetus) . . . . - 666 
erassicornis (Siphonoecetes) ; 666 
erassicornis (Stenothoe) . . . . 195, 195 
erassicornis var. coogeensis (Allor- 
Bra)... ae 538 
erassi (Eusiroides) . . . :... 346 
erassimana (Leucothoe). . . . . 168 
erassimana (Moera) . .. ..... 445 
erassimanus (Oratippus) . . » .- »- 207 
erassimanus (Elasmopus) . . . 445 
crassimanus (Gammarus) . . . . 512 
erassipes (Eurystheus) . . . . . 612 
erassipes (Gammaropsis) . » - » - » 612 
erassipes (Harmomia) . . . ... 383 
erassipes (Harmonia) . » » »...» 383 
erassipes (Moers): . , 4:4: ,..., . 612 
erassipes (Nicea) . . . . . sär 561 
erassipes (Parapherusa) . . . . . 383 
erassipes (Perrierella) . -. .... . 41 
erassipes (Protomedeia) . »..... 383 
erassipes (Unciola) . . ... 2 
erassirostris (Monoculodes) . . . 263 
erassum (Tetradeion) . . . -.. . 157 
‘serassus (Gammarus) . . .... 467 
a 206 
N | 
erenata (Callisoma) . - » »-.... 62 
erenatipalma Bose). ee 680 
erenatipalma (Dryope). . ... » . 680 
erenatipalmata (Dryope). . ... » 680 
erenatipalmata (Metopa). . . .». . 188 
erenatipalmata (Uneiola). .. .. . 680 


erenatipalmatus (Cheirimedon) . . . 60 
erenatipalmatus (Cheirimedon) . 67 


erenatipalmatus (Proboloides) . . 188 
erenatipalma (Unciola) ..... 680 


erenatus (Scopelocheirus) . . . . 62 
erenulata (Amphithoe) ...... 


E 
De 


Alphabetical Index 


© page 
erenulata (Harpina) . . . .... . 141 
erenulata (Harpinia) . - . .. . 141 
erenulata (Harpinia) . . ... . - 144 
erenulata (Syrrhoe) . ... . . 282 
erenulata (Syrrhoe) . . . . . Re 
erenulatum (Centromedon). . . . . 720 
erenulatus (Atylus) ... . . . 359 
erenulatus (Centromedon).. . . . 720 
er a Re 191 
N Be 190 
erispata (Lysianassa) . ...... 46 
erispata (Orchomene) . . . ».. 46 
erispatus (Anonyx) .. .....». 46 
erispatus (Örchomene). .. .». . . 46 
eristata (Amathillina) . . . .. . 499 
eristata (Amathillinella) . .... . 499 
eristata (Amphithoe) . .»...... 219 
eristata var. spinata (Amathillina) 501 
eristatum (Acanthonotosoma). . . . 219 
eristatum (Acanthonotozoma) . . 219 
eristatum (Cyrtophium) » . . . .» . 706 
eristatum (Platophium) . . .... 706 
eristatus (Acanthonotus). . . : » » 219 
eristatus (Podocerus) . . . . . . 706 
eristatus (Vertumnus) . . .» ...» . 219 
mstiea (Beiopis) 2.2... 27... 406 
eroatieus (Gammarus) . -. . ... . 406 
eroaticus (Niphargus). . . . . . 406 
©tenacanthus. ..... . 731, 734, 734 
cubensis (Lysianassa). . . .. - 38 
eubensis (Lysianax) . -. »..... 38 
eueullata (Tryphosa) . ..... 720 
eumbrensis (Microjassa). . . . . 651 
eumbrensis (Podocerus) . . .» .. .» 651 
eunieulus (Amphithoe). .. ... . 647 
eunieulus (Bianeolina). . . . . . 647 
euprea (Hyalella) . . ...... 578 
eupreus (Allorchestes). . . .. . . 578 
eurticauda (Dulichia) ...... . 715 
eurvirostris (Oediceros) . . . . . . 246 
eurvirostris (Paroediceros) 246 
eurvispinum (Corophium) . . . . 690 


euspidata (Acanthozone) 324, 325, 325, 326 


cuspidata (Paramphithoe) . . 326 
euspidata (Pardalisca). . . .. . 223 
euspidata (Pardalisca) .. . . . 222, 224 
euspidatus (Eusirus) . . .... 339 
euspidatus (Eusirus). . . . 340, 341, 342 
euspidatus (Oniseus). . ». ..... 326 


euspidatus (Siphonoecetes) . 683, 740, 740 
euspidatus var. antarctieus (Eusirus) 340 


en NE ne 790 
eyaneus (Echinogammarus) . . . 484 
eyaneus (Gammarus) . . ..... 484 
en a FREE ET 79 
N TR RE RE PR: 30 
eyelops (Ampelisca)... ..... . 722 


753 

page 
eylindrieum (Corophium) . . 692, 740 
eylindrieus (Podocerus) . . 648, 658, 692 
ee 5 631 
eymba (Lysianassa) .. : .... 87 
a TE a 685 
Eh 28, 717 
Re Re 157 
eypris (Stenothoe). . . ..... 725 
SEDTOIBER Tu ne, 157, 723 
EN ee 157, 160 
a TE 697 
ezerskii (Echinogammarus) . . . 482 
ezerskii (Gammarus). . . .» 2... 482 
ezyrnianskii (Gammarus). . . . . - 874 
ezyrniahskii (Hyalellopsis) 374 
daleyi (Ampelisca) . . ..... 111 
damnoniensis (Cyproidia) . ... . 160 
damnoniensis (Lembos) . . . . . - "593 
damnoniensis (Mierodeutopus) 593, 736 
damnoniensis (Peltoeoxa) . . ... . 160 
a Te ER a 707 
danae (Leptothoe) 440 
danae (Maera).'. 2... 700, 440 
Gmme (Massa. 27. a 440 
danae (Platophium) . . ... . FR 
danae (Podocerus) . . ..... 705 
N ee BR Du ER 
danai (Allorchestes). . . . .... 566 
a) A 360 
danai (Pontogeneia). . -. . .. . 360 
danai (Stenothoe). . . . :.»...- 198 
RES. ar nee 360 
danica (Chimaeropsis) . . .. .. - 277 
danielsseni (Ambasia) . .. . . . 51, 719 
danielssenii (Ambasia) . . . . . 5l 
danmonensis (Mierodeutopus). . . . 786 
danmoniensis (Lembos) . . . . . - 593 
danmoniensis (Mierodeutopus) 592 
DERNIDER re 208 
N RE RE 208 
darwinii (Oyrtophium). . . .».... 703 
darwimii (Orchestia). . . ...... 545 
darwinii (Platophium) . .... . . 703 
darwini (Talorchestia) . . . . . 545 
Dautsenbergia= . . '. 2... 2. 728 
debilis (Panoploea) . .. ..... 294 
debruynü (Anonyx) . -. » ...». 172 
debruynii (Chironesimus) . . . . 72 
delaplata (Elasmopus). . . .. .- 444 
delebeequei (Gammarus) 475 
dellavallei (Eusiroides) . . . . - 346 
dellavallei (Haploops) . . . 116, 722 
dellavallei (Leptocheirus) . . . . 628 
dellavallei (Liljeborgia) . . . . . 234 


dellavallei (Lysianella) - . . .. 32 
dellavallei (Siphonoecetes) 
demimutus (Gammarus) . . . . . 


Das Tierreich. 21. Lief.: T.R.R. Stebbing, Amphipoda I. 48 


754 

page 
demissus (Monoculodes). . . . - 267 
dentalii (Concholestes) . . . . . 663 
dentallii (Concholestes) . . .» . . - 663 
dentata (Ampithoe) . ....... 575 
dentata (Atylopsis) . . ..... 299 
dentata (Dexiocerella) - . . .». .. . 706 
dentata(Gammaropsis). . » » » . . 738 
dentata (Hyalella). . ...:.. 575, 578 
dentata (Megamoera) . . .».... - 427 
deäatetea (Mellta) 3:5. 400 
dentata (Melita) . ..:... 429, 487 
dentata (Orchestia) -. -. ». . ... 537 
dentatum (Corophium) . .... 692 
dentatum (Cyrtophium) . .».... . 706 
dentatus (Allorchestes) . . .. . - 575 
dentatus (Atylopsis). - » :».. .- 299 
dentatus (Eurystheus) . . .. . . 738 
dentatus (Gammarus) . . .. . 427, 427 


dentatus var. gracilicornis (Allorchestes) 578 
dentatus var. inermis (Allorchestes) . 578 


ASRLELWAHEH) 2.2, 653 
dentex (Podocerus) » .». .: . . ... 653 
dentieulata (Leueothoe) ..... . 165 
dentieulatus (Anonyx). - ..... 59 
dentieulatus (Hippomedon) . . . 59 
dentieulatus (Hippomedon). . . . . 60 
dentifera (Gammaropsis) . . . . . - 615 
dentifera (Moers) . . .. . . x... 615 
dentifera (Paranaenia). . .. . 615, 616 
dentifer (Eurystheus) . . ... . 615 
dentimanus (Cheirimedon). . . 720 
depressa (Autonoe) ........ 622 
depressa (Goösia). . . ..... 622 
TOO ee een 604 
ERDE 3 a a a 208 
deshayesii (Orchestia) . . . . . 545, 545 
deshayesii (Örchestoidea). . . . . . 735 
deshayesii (Talorchestia) . . 545,735 
desmarestii (Amphithoe) . . . . . . 639 
Dasssbplilus 22... 2.2 vlt rein 208 
devismesi (Bathyonyx) . ... - 729 
in 11 ER IR 514 
DORAmariUns,: nn 514 
Doxsasmiuae. 4.2.0... 0,0% . 514 
Doxsmiine age au 514, 735 
Dezaminidae... .. ..... 514 
Dexasshndl 2 2 210, 514 
Dexiocerella ..... DER Tales 700 
diadema (Ampelisca) . ..... 107 
diadema (Ampelisca) . . 109, 109, 110, 110 
diadema (Araneops). . ».».... 107 


dichraas (Pleuracanthus borowskii var.) 733 
dichrou (Gammarus borawkii var.) 733 
dichrous (Gammarus borowskii var.) 498, 733 
didacetyla (Calliope) -. -. ...... 741 
diemenensis (Aspidophoreia) . . . . 581 
diemenensis (Elasmopus) . . . . 


r 


Alphabetical Index 


page 

diemenensis (Leucothoe). . . . . 168 
diemenensis(Megamoera). . .» .. . 442 
diemenensis (Örchestia) . .»..... 548 
diemenensis (Talorchestia) 548 
difformis (Cerapus) . . ».2.... 672 
difformis (Erichthonius) 671, 672, 672, 672, 
673, 673, 674, 674, 715 

difformis (Eriehtonius). . » » . . .» 672 
difformis (Eriethonius) . . . . . 671,673 
difformis (Eriethonius) . . . . . 672 
Dikerogammarus . . ...... 458 
dilatata (Orchomenella) . . . . .- 720 
dilatatus (Gammarus pachytus var.) . 404 
ET EN EN EIN FINEN 791 
diplodactyla (Hyale). . ..... 562 
diplodaetylus (Hyale) . . . . . . . 562 
dispar (Orehöstis) . Kiss 532 
distinguendus (Aceros). ». » .»» . » 255 
distinguendus (Halimedon). . . - . 255 
diversimanus (Maera) . ...... 741 
doliehocarpus (Eusirogenes) . . . 728 
dolichonyx (Dexamine) ...... 518 
dolichonyx (Tritaeta) ...... . 518 
dollfusi (Stenothoe) . . . . . 196, 725 
donatol (Maets) 7. a: ts. Ten 435 
drechselii (Cheiroeratus) . . . . - » 420 
drepanocheir (Acanthonotosoma) . . 298 
drepanocheir (Harpinioides) . . . 298 
DOBE ER EAN ne 676 
Diyspolder, Ze wn tay 601 
Diyabe: 2 3. 3 Beni "078 
Dryopöldes' 2 ak en 601 
dryshenskii (Dybowskia). .». . .. » 730 
dryshenski (Pallasea). .. .. .- 730 
duabeni (Gammarus). . »... » "2.2408 
dubia (Ampelisca). . . »..... 100 
dubia (Amphithoe) . ....... 643 
dubia (Amphitopsis). . » ».... 741 
Auy3a (OPABBRA}:; 2.0: Eu 191 
dubıa (Oressa) 2.2.2.0. 12:25 0 192, 192 
dubia (Dansis) u u. a, ae 191 
dubia (Liljeborgia) . .» - . » 233 
dubla-(@Maera): 2. re 1732 
dubia (Sunamphithoe). . ». »..». 643 
dubius (Anisopus). ». . . . - 0 
dubius (Elasmopus). . ..... 732 
dobius (Eusirus) . „ae ste nsar 233 
dubius (Gammäarus). . ..... 512 
dubius (Montagua). . ». . 2... 191 
dubius (Pleonexes) . ». .... . 643 
duebeni (Gammarus). . . »»... . 473 
duebenii (Gammarus) . . . . 478,733 
duebenii var. wilkitskii (Gammarus) . 733 
dugesii (Gammarus). . ...... 425 
Dustohla ea. Se a ea 708 
Dolichidaer..=.:, 0. 2203 Kara 694 
Dalichifkr,.,2 u... SE 694 


: 
Be 
3 
4 
t 
. 


, Alphabetical Index 755 
page page 
Dalschiidse 2.372 Hr. N 741 
Dybawskıe 2 4.04 9.0 780,786 | Ephipphors  . „2... EN 
dybowskii (Hyale). »........ 579 | ephippiatus(Gammarusaraneolusvar.) 479 
dybowskii (Hyale (Allorchestes)) . . 579 | Ephippiphora . . » 2... 2.2... 56 
dybowskii (Hyalella) . ..... Es 7 329 
dybowskii (Pallasea) .. .. . . 978:1 MDImBBle: a ek 321, 728 
Dyopedidae ..... an, era  nimermae: ae 320 
DR ar EN EEE wei Beimerimaeıy su... 2% 320 
dytiseus (Lepidactylis) . - ».. . TE 792 
eblanae (Iphimedia) . ». »...... DIR Bnchkonien 22 0. 0 en 670 
eblanae (Iphimediopsis) . -» . . 212,741 | Erichtonius . . ...:...... 670 
eblanae (Panoploea). . . . ... 213 7 Wmiethonius u 0, 670, 740 
Echinogammarus . . »..... rn. ee 2 A ee PER 411 
echinus (Allorchestes) . . . » .. . BIO. BPIODRRE On 5 niet 411,732 
echinus (Hyalella). ....... Re re TR 4ll 
Barlophtihelme, a: 2... l | ermannii (Crangonyx). . . . - - 373 
edvardsi (Amphithoe) . . ... . . 348 | ermannii (Gammarus) . . »...- 373 
edvardsii (Talitrus) . ». . .» .... 848 | erosa (Tryphosa) .. -. .». »..... 741 
edwardsi (Anonyx) . » » 2... 45 | erythraea (Amphithoe) ..... - 639 
edwardsii (Amphithoe) . . .... 848 | erythraea (Moera). .. .».....- 446 
edwardsii (Amphithonotus) . . . . . 348 | erythraeus (Elasmopus) . . . . - 446 
edwardsii (Amphitonotus) . . . . . 349 | erythrophthalma (Autonoe) . . . . 618 
edwardsii (Anonyx) . . . . 25,27,28,45 | erythrophthalma (Eurystheus). . . . 618 
edwardsii (Onesimus) . » 2.2... 25 | erythrophthalma (Gammaropsis) . . 618 
edwardsii (Onisimus) . . ... - 25 | erythrophthalma (Maera). .. ..» . 618 
edwardsi (Monoculodes). . . . - 727 | erythrophthalmus (Gammaropsis) . . 618 
NE A a RE EL RR RE 128 | erythrophthalmus (Gammarus (Gam- 
egregia (Ceina) . . ».. 2»... 554 Je er 618 
Ouresie (Nivea). EB 554 | erythrophthalmus (Phoxocepha- 
N ae EN Pe 606 A EN 136 
BMlasmopus :. ns 441,782 | erythrophthalmus (Phosus). . . - - 136 
elegans (Amphithopsis). . . -» .» . » 306 | erythrophthalmus (Socarnes) . . 57 
elegans (Anonyx) . ....... 86 | erythrops (Byblis) ....... 112 
elegans (Halirages) . -. ..... . 292 | eschriehti (Ampelisca) . . . 100,117, 721 
elegans (Niphargus). .... . . 409 | eschrichtii (Ampelisca). . 100, 721, 722 
elegans (Paramphithoe) . .... . 806 | eschriehtii (Ampelisca) ... ... 101 
elegans (Pherusa) .. . . ...... 806 | eschrichtii (Opis) - . - - +...» 20 
elegans (Rachotropis) . » . .» ». .» 350 | eschriehtii(Opisa). - - » -- . - 20 
elegans (Rhachotropis) . . . . - 850 | eschrichti (Opisa). . » »».. IE. 
elegans (Urothoe) . . ...... 131 | esmarkii (Metopa). ». . ..».. 173 
elegans var. imperfeetus (Niphargus) 409 | esmarki (Metopa) .. . -...- .» 173 
elliptious (leilius). . 2.2.2.2... 707 | euacantha (Paramphithoe) . . . . - 312 
elongata (Amphithoe) . ..... . 644 | euacanthus (Pleustes) . .... - - 812 
elongata (Eriopis). - » -» ».... #47 7 Boandanls’...2.....0.. ie. 97 
elongata (Eriopisa) . ...... 411 | euchore (Orchestia) . . » ».... 532 
elongata (Eriopsis) . . » .... . 411 | Euerangonyx . . ... . . . 388, 730 
elongatus (Gammarus). . . 2... a a 19 
elongatus (Niphargus) . . . . 2... 411 | europaeus (Gammarus kesslerii var.) . 377 
elongatus (Niphargus plateaui) . . . 731 | europeus (Dybowskia kesslerii var.) .. 730 
emarginata (Atylopsis) . . . . . BI Bey mer Nenn ee 356 
emarginatum (Acanthonotosoma) . . 800 | euryonyx (Leucothoe).. . . - » - 724 
emarginatus (Atylopsis) . . . ... BET Ineyporea. . .» ee 72 
emissitius (Dereothoe) . . . . . 605,674 | Burystheus. . ....... 610, 738 
emissitius (Dereotho& (Cerapus)) . . 605 | Eurytenes . ... 22:22... 72 
emissitius (Gammarus). . . . . -..605 | Eurythenes .. .. . 2... ... 12 
emissitius(Mieroprotopus). . . . 6058 | Eurytheus . . ...: 2.2... 610 
emistuis (Dereothoe) . .... . OR: Dumnus =. 2 at 338 


756 
page 
Bueiridsas. u. 2.2.0... 338, 728 
MUMLORENEB 5 re Be 728 
BuBioidaan ee 3415, 729 
WEHTOBBIB NE Es 343 
en ER 338, 729 
excavata (Harpinia). . . . . 142, 723 
excavata (Naeniä). - . 2». ..5... 620 
excavata (Noeniae). . .. 2.2... 620 
excavata(Orchestia). . . . ... 735 
excavata (Örchomenopsis) . . . . . 721 
excavata (Podoceropsis) . . .. » - 621 
excavatum (Corophium) . . .». .» 664 
excavatum (Paracorophium) 664 
excavatus (Örchomene) . ..... 85 
exigua (Paramphithoe). .. ... . 318 
EIzuus KANOnyEH.. u 86 
exiguus (Anonyx). ... +... 0,.% 87 
exiguus (Hoplonyx) . . »..... 720 
exiguus (Tmetonyx) .-.... 720 
REN (Mole) 7.2, Senann e 423 
Bxoediceroß : „in. 4m nn. 239 
exsertipes (Eurystheus). . .. - 614 
exsertipes (Gammaropsis) . » » » - 614 
exsertipes (Protomedeia) . . . . - 614 
N 206 
falcata (Bruzeliella)........ 739 
faleata CDulichisy: ns. 2275. 712 
Faleata Fassa). ie 656 
faleatiformis (Jassa) . .» .....653 
faleatiformis (Podocerus). . . : . » 653 
falcatus (Astacus). ». . ». 2. c.». 656 
falcatus (Atylus) ... =.“ wm. 3530 
falcatus (Cancer (Gammarus)) 656 
faleatus (Dyopedos). -». ».»..». 712 
Tlonten KIREB) in mis ai 656 
faleatus (Leptophoxus) . ... . 136 
faleatus (Monoeulodes) . .... - 266 
faleatus (Nototropis) . - -» - » . 8330 
falcatus (Paratylus) . . .. » . 330 
falcatus (Phoxocephalus). .. . . » 136 
faleatus (Phoxzus) . . . . ».... 136 
faleatus (Podocerus) 585, 649, 651, 653, 654, 
655, 656, 657, 658, 662 
falklandi (Amphithoe) . .. .... 637 
faroensis (Oyelocaris) . -. ..... 717 
fasciata (Brandtia) . .....».. 398 
fasciata (Protomedeia) . . :.. » 623 » 
fasciata (Protomedeia). .. .».. 628 
fasciata (Xenocheira) -. . ... .. 624 
faseiatus (Ceradocus) . 481, 432,442, 612 
faseiatus (Cerapus) . x»... 2... 674 
fasciatus corallinus (Gammarus) 432 
fasciatus (Dikerogammarus) . . . 460 
fasciatus (Eriethonius) . ... . 674 
fasciatus (Gammarus) . . . 482,513, 460 
fasciatus violaceus (Gammarus) . . . 482 
fasciculata (Hyale) . .... . .... 565 


Alphabetical Index 


page 
faseiculata (Maera) . » 2.2.2... 74 
fasciculata (Megamaera) .. ... . 741 
fascieulata (Nicea) - ....... 565 
fasceigera (Parhyale) ...... 556 
faseciger (Parhyale) .. . 2...» 556 
feminaeformis (Orchestia bottae var.) 534 
femorata (Amphithoe). . . - . "2 = ‚636 
femorata (Ampithoe) . ..... 636 
femorata (Pontoporeia) . .... 128 
femorata (Pontoporeia) . .....» 128 
femoratus (Anonyx) ...... 86 
ferox (Pleonexes) . . ...... 738 
festäva (Moera) . .- sm ae 43] 
filieornis (Amphithoe) . . . -»...» 641 
filieornis (Ampithoe) . ..... 641 
flieornis (Anonyxk) . » +» sr. 87 
filieornis (Lysianassa) . ». » .».. 39 
filieornis (Lysianassina) - -» .... 39 
filieornis (Pontiporeia) 128 
filigera (Amphithoe). . ». » .»... 641 
filigera (Ampithoe) - . . .... 641 
BHSET CARORIEY 4 a 86 
filosa (Amphithoe) . :» »:...x. 641 
Btosa (Ampithoe) wi. m: 0% 641 
Mosa (Uymadusa) : =: 4.4... ..8 % 641 
fimbriata (Hyale) . x . s ..5...5% 564 
Ruabriate (Nices) 2... 2, a. 564 
fimbriata (Protomedeia) . .. . . - 627 
fimbriatus (Gammarus) . »....» 627 
fimbriatus (Syrrhoe). . .. . .». 280 
fimbriatus (Syrrhoites) . . . . - 280 
fingalli (Calliope). ». » » 2.2... 317 
fingalli (Calliopius) . -» » +...» 317 
fiseherii (Orchestia).. . »..»..» . 528 
fischerii (Orchestoidea) . . . -. 528 
fisheri (Lysianassa). . . 87, 721 
fisheri (Lysianassa) -. . .. 2... 719 
fissicauda (Amphithoe) . . .» . . 361 
fissicauds (Atylus)  » =... u. 861 
fissieauda (Iphimedia) . ...... 861 
fissieauda (Pontogeneia) 361 
fissiecornis (Gammarus) . .».... 231 
fissicornis (Iduna) . .. 22... ..281 
fissiecornis (Liljeborgia) . - . - - 231 
fissicornis (Lilljeborgia) . » » . » » 232 
fissispinosa (Orchestia) . ».... 526 
fissispinosus (Talitrus) . . .. . 526 
fixsanii (Akylus) ., » a»... 00% 402 
fixsenii (Gammarus). » »..... 402 
fixsenii (Mieruropus) . . . .. . 402 
flabellifer (Gammarus) . .. .. 513 
flagellatus (Crangonyx) . . . 371,730 
flagelliformis (Spinifer) . ». .... 134 
flavus (Acanthogammarus) 734 
flavus (Gammarus) . » 2.2.2... 455 
flavus (Ommatogammarus) . . . 455 
flavus (Polyacanthus) . . .»....:. 734 


ee er A THF : 
re a 


Alphabetical Index 


page 
flindersi (Amphithoe) . .. .... 635 
flindersi (Ampithoe) . . .... 635 
flindersi (Cerapus) . ... . 668, 740 
flindersi (Dexamine). . ». ... . 522 
fSlindersi (Guernea) . . .».... 522 
flindersi (Leueothoe) . . . .». . - 167 
floresiana (Orchestia) . . . . - - 539 
ee 496 
flori (Heterogammarus) . . . » . 496 
florii (Gammarus). - ....... 496 
flori var. albula (Gammarus) . . . . 496 
fluvialis (Lockingtonia) . . . . . . 575 
Aluviatilis (Calliope) . . ». »:. 297 
fluviatilis (Calliopius) . » ... » » 297 
fluviatilis (Carinogamımarus) . . . . 506 


fluviatilis (Gammarus) 410, 454, 455, 455, 
456; 456, 469, 474, 475, 475, 477, 478, 
479, 482, 484, 485, 485, 486, 486, 487, 
488, 488, 489, 490, 490, 491, 492, 494, 
495, 496, 496, 497, 502, 503, 503, 504, 
504, 506, 506 


fluviatilis (Paracalliope) z 297 
fluviatilis var. manophtalmus (Gam- 
nn A Re RR ER er 409 
fontana (Atyloides) : » : » :... 729 
fontanus (Atyloides) : .» . .. .- 729 
fontanus (Niphargus) . . . 408, 731 
fontanus (Niphargus) . » . »... 732 
fontinalis (Gammarus) . .... 513 
foraminiferum (Lepidepecreum) . 79 
forbesii (Parambasia) . . .. . . 718 
forelii (Gammarus puteanus var.). . 406 
forelii (Niphargus) . . . .... 406 
forelii (Niphargus puteanus var.) . . 406 
forellii (Niphargus puteanus var.) 406 
formosa (Melita) : : : 2:2... 427 
fossarum (Gammarus) . « -» .»... 474 
fossor (Exoediceros) . . .»... 239 
fossor (Oedicerus) . » :..... 239 
fougneri (Cheirimedon) . . . . . 720 
fragilis -(Gammarus) . . » ..... 454 
fragilis (Paramphithoe) . . .:... 354 
fragilis (Phreatogammarus) . . . 454 
fragilis (Rhachotropis) . : .. . - 354 
fragilis Rozinante) . . . .... 354 
fragilis (Tritropis) . - : : : 2... 354 
franciscana (Megalorchestia) . . . . 528 
franklini (Orchomenella) . . .. 721 
frauenfeldti Xenodice) . . .. - 700 
frauenfeldti (Zenodicee) . ..... 700 
frequens (Jasse) .....:2..% 656 
frequens (Podocerus) . . .» .»... 656 
fresnelii (Amphithoe) . . ..... 423 
fresnelii (Gammarus) . . ..... 425 
fresnelii (Melita) . :. ...... 423 
fresnelli (Melita) . 2 . 2...2..... 423 
fueicola (Amphithoe) . . . 2... 449 


757 

page 
fucieola (Cerapus) .. ...... 658 
Maienis (Mehi) 2°. .......-. 4... 449 
fueicola (Pherusa) . . ..... 449 
füricols (Pheras) . .....,... 307 
fuegeensis (Moera) . .. .»..... 600 
fuegensis (Orchestia) . - .». ... . 539 
fuegiensis (AnonyxX): . .» :» .... 88 
fuegiensis (Gammarus) . .». .. .. 600 
fuegiensis (Lembos). . . . . . . 600 
fuegiensis (Moera) . . »..... 600 
fultoni (Metaphoxus) . . . .. . 139 
fultoni (Neoniphargus) . . . . . 731 
fultoni (Phoxocephalus) . . . .. . 139 
fülva (Birtonna)' ..:,...°...2. 205 
fulvoeineta (Acanthozone) 291,293, 305, 306, 

308 
fulvoeineta (Amphithoe) -. . . . . 291 
fulvoeineta (Paramphithoe) . . . . 29 -»- 
fulvoeinetus (Halirages). . . -. . 291 
fulvus (Bircenna) :.- : ..: #... 205 
fureicornis (Gammarus) . . .».. 437 
fureicornis (Maera) . . . ...».. 437 
fureieornis (Moera) . . ...... 437 
fureigera (Pontoporeia) . . ... . 128 
furina (Leucothoe) . . .. . 165, 724 
furina (Leucothoe) . . .»...... 167 
furina (Lycesta) : » 2:2: 2.... 165 
fusea (Ampelisca). . . » -.». 102 
fuscea (Maera) . 22.2.2... 0.8.% 440 
Abe (Moers) 2: We 440 
kuss -(keridium) 2% 72. 080%: 201 
fuscus (Eehinogammarus) . . . . 486 
fuseus (Gammarus) : . . .» -»:.. 486 
fusiformis (Harpina) . . ..... 144 
fusiformis (Phoxus) . . . ..... 144 
gabrieli (Atyloides) . - . . - =» - 729 
gaimardi (Byblis). - ... 2. ...».. 113 
gaimardii (Allorchestes) . . . .. - 581 


gaimardii (Ampelisca) 107, 109, 112,113, 
113, 113, 114, 114 


gaimardii (Ampelisia) . - .». ... - 113 
gaimardii (Amphitoe) . . »... - 556 
gaimardii (Byblis) . - . ....- 113 
gaimardii (Neobule) . ..... 556 
GRlanthie; u mar ee 559 
galatese. (Hyale) 1:2... 563 
ET a ER EEE 723 
gallensis (Stenothoe) . ». .» .. - 725 
Gammaraeanthus . -. .. 2... 501 
Gammaracanthus . . . - 507 
Bee N RER 449 
Gammarellus 1, 89, 163, 321, 374, 460, 479, 

524, 530 
Gammarellus +. u ni 386 
gammarellus (Cancer) . .». .» 2... 532 
gammarellus (Gammarus) . . .. - 532 
gammarellus (Öniscus) . . » » . . . 5832 


758 


page 

gammarellus (Örchestia) 528, 529, 529, 533, 

634, 534, 588, 588, 539, 540, 540, 542, 
543, 548, 550, 550, 551, 551, 557 


gammarellus (Orchestia) 532 
Keanmaridae.". uns 5 
G&eammaridaß:......,r, 364, 729 
Gammearidea era . 5 
ET TE RER 88, 364 
GANMELIURS: 21... 0 nn 1, 364 
RU RFInE 5 2 ae ne alas 5 
gammaroides (Amphithoe) . .. . . 642 
gammaroides (Pleonexes) . . . 642 
gammaroides (Sunamphithoe). . . . 642 
Gammaropsis. .. :... 594, 610, 623 
GERINGER 2 a un rn 1 
TE er 460, 733 
gammeroides (Amphithoe) . . . . . 642 
gardineri (Eurystheus) ..... 738 
gardineri (Gammaropsis) . .... 738 
EIN a BE PELFE TEE | 
gaudichaudii (Amphitoe) ..... 636 
gayi (Amphithoe). ....2.... 428 
gayi (Amphitoe) .. 2.2... 2... 428 
BAT CME) a 428 
gayi (Orchestis) .. - .. „2... 741 
gazella (Allorchestes) ...... . 572 
gazella (Amphithoe) ....... 572 
gusella. (Hysle) 2.0; 565 
gazella' CHyB8le), - . . 1.2: ei 572 
geelongi (Hippomedon) . . . . . 60 
genieulata (Iphimediopsis) . . . . . 741 
geniculatus (Phoxocephalus). . . 136 
genieulatus (Phoxus). . ...... 136 
georgiana (Apherusa) . . . . . . 308 
georgiana (Hyale). ....... 572 
georgianus (Allorchestes) . . . . . 572 
georgianus(Calliopius). . . » ... 308° 
gerstaeckeri (Gammarus). . . . . . 446 
gerstaeckeri (Plesiogammarus) 446 


gerstfeldtii (Dybowskia cancellus var.) 730 
gerstfeldtii (Gammarus cancellus var.) 377 


gerstfeldtii (Pallasea) . . . . 377,730 
gibba (Ampelisca). . . ..... 101 
gibba (Amphithoe) . ...... 296 
gibbosa (Dexamine). ....... 513 
gibbosa (Lampra). . . 2. ..... 517 
gibbosa (Phippsia) . . ..... 90 
gibbosa (Tritaeta). -. . ..... 517 
gibbosus (Aspidopleurus). . . . . MM 
gibbosus (Atylus) . . : 2......... 517 
gibbosus (Monoculodes) . . . 259, 726 
gibbosus (Stegocephalus) . . .. . 90 
gigantea (Alicella) . . ..... 63 
gigantea (Andania) . .»....... 97 
gigantea (Bovallia) . . ..... 357 
gigantea (Euandania) . ..... 97 
giganteus (Stegocephalus) . .. . . 97 


Alphabetical Index 


page 
gigas (Anonyz). : von nu .....64 
zigas (Uristes) .:: „an re, 64 
RER SEN 155 
GitanopBisE: een 153 
glaber (Amphithopsis). .. ... . 318 
glaber (Atylus). .... . | 
glaber (Gammarus) . . ... 2... 401 
glaber (Miceruropus). ...... 401 
glaber (Parapleustes) ....... 318 
glaber (Pleustes) .. ..... se. 818 
glaber (Sympleustes) . .... . 318 
glabra (Paramphithoe) . . .... . 318 
glacialis (Amphithopsis) . . . . . . 307 
glacialis (Apherusa) . -. ..... 807 
glaeialis (Leucothoe) . ... . { 189 
glaeialis (Metopa).-.. .. . 2... 189 
glaeialis (Montagua), . .. .... 183 
glacialis (Proboloides). . ... . 189 


glacialis (Pseudalibrotus) . . . . 718 
glacialis var. leucopis (Pseudalibrotus) 718 


glaeilis (Parapleustes) . ...... 320 
gladiosa (Melita) . ...... . 428 
KSUEDROER a re 676 
N SEELE EEE 60 
aiyoertin. a TE RITTENL, 
ET EEE . 412 
Gmelinopeis!. 2 Zn are 414 
godeti (Niphargus) . ...... 409 
godlewskii(Acanthogammarus) 510,734 
godlewskii (Ceradocus) . . :... 510 
godlewskii (Gammarus) . . »... 510 
godlewskii (Polyacanthus) . .. . . 734 


godlewskii var. vietorii (Gammarus) . 510 
godlewskii var. vietorii (Polyacanthus) 734 


RB; ir ser a a 
goes (ABHNYX) u... 4 ie 45 
go (Meiste) 2». mia ae 427 
goesii (Nannonyx) .. ...... 36 
goesii (Orchomene) . .:....... 36 
go&esi (Melphidippa). ...... 335 
goniamera (Jassa). -..-..... 739 
Baplane A era 368 
gordoniana (Dexamine) ...... 330 
KORBRR 2, e 304 
gracilicornis (Allorchestes dentatus 

N EEE 578 
graeilis (Allorchestes) . . . . .» » 572 
graeilis (Amphithoe). . . .» . ..». 641 
grachhe (Adre) wie Su 587 
gracilis (Apherusa) . . ..... 727 
graeilis (Bathyporeia) . . . ... 121 
gracilis (Crangonyx). ». ». »....- 390 
gracilis (Eucrangonyx) . -.... 390 
gracilis (Gammarus). .. ..... 472 
gracilis (Hyalsyı. a ER 572 
gracilis (Leucothoe). .. .... 168 
gracilis (Lonchomerus) . . . ».. 587 


Alphabetical Index 759 

page page 

gracilis (Orchestia (Talorchestia)). . 55l | grimmi (Niphargoides) .. . . . 452 
gracilis (Paramphitho@) . . . . 313,320 | griseus (Monoculodes).. . . : . - 262 
gracilis (Parapleustes).. -. . - „ . 320 | griseus (Oediceros) . . . 2.2... 262 
graeilis (Rachotropis) . . .» » . » - 353 | groenlandica (Metopa). ... . 190, 725 
gracilis (Rhachotropis) . . . . . 853 | groenlandica (Örchomene) . . .. . 83 
graeilis (Schraderia). . . .» : » » 308 | groenlandica (Orchomenella) . . 83 
gracilis (Synopia) . - » »»..-». 271 | groenlandieus (Anonyx) . ....» 83 
gracilis (Talitrus) . . . .»-..... 55l | groenlandicus (Proboloides) . 190, 725 
gracilis (Talorchestia). . . . . . 55l | grossimana (Maera). .... 5480 
graminea (Allorchestes) . ... . . 564 | grossimana (Maera) ........ 438 
graminea (Hyale)........ 564 | grossimana (Moera) . .»..... 435 
gramineus (Allorchestes). . . . » . 564 | grossimanus (Astacus). . . :.. 435 
grandicornis (Allorchestes) . . . . » 566 | grossimanus (Cancer (Gammarus)) . . 435 
grandicomis (Halice) . . . .» .. - 229 | grossimanus (Gammarus). . ... -» 435 
grandieornis (Hyale) . .... . 566 | grossimanus (Moera) . . ».... 435 
grandicornis (Orchestia) . .. . . » - 566 | grossipes (Cancer) . .».»..... 686 
Grandidierella . ... . 2... 739 | grossipes (Corophium). . . ».. - 686 
grandimana (Amphithoe). . ... - 645 | grossipes (Gammarus) . . .... 686 
grandimana (Amphithopsis) . . . . 318 | grubei (Monoeulodes) . . .... - 237 
grandimana (Autonoe). ..... - DW GRUDIAN HE er 5 644, 738, 739 
grandimana (Dautzenbergia) . . . 728 | grubii (Crangonyx) . » .» x...» - 379 
grandimana (Leucothoe).. . . . . 168 | grubii (Dybowskia) . ..»..»..... 730 


grandimana (Protomedeia) . . . 738 
grandimanum (Probolium) . . . . . 187 


grandimanus (Amphithoe) . . . . . 634 
grandimanus (Chevreuxius) . . . 670 
grandimanus (Leucothoe) . . . . » 168 


grandimanus (Microdeutopus) . . . 
grandimanus (Proboloides) . . . 187 
grandimanus (Sympleustes) . 318, 728 


grandis (Phoxocephalus) . . . . . . 147 
grandis (Phoxus) . . ....... 147 
grandis (Pontharpinia) . ... .» 147 
grandoeulis (Calliope) -. . .» »..» . 296 
granulosus (Nototropis). . . - . 728 
granulosus (Paratylus). . . ... » . 728 
EN EB 386 
er a ee 386 
gregaria (Metopa). - » .:.... 189 
gregaria (Pontogeneia) . .» »...- 358 
gregaria (Stebbingia) . . . .» . . 358 
gregarium (Probolium) . . .... 189 
gregarius (Proboloides) . . . . . 189 
grewingkii (Brachyuropus) . . . 393 
grewingkii (Crangonyx) . .» ... . 393 
grewingkii (Gammarus) . » ... 393 
grillus (Orchestia) . : ..... 540 
geillas (Taliteus) .. + =... 2..22840 
ee re Et ME 162 
grimaldii (Hyale) . ..... 567, 736 
grimaldii (Orehomene) . .... 88 
grimaldii (Rachotropis) . . .» . . » 729 
grimaldii (Rhachotropis) 350, 729 
grimaldii (Tritropis). . » . ». . . 350 
grimaldii (Urothoe) . . ..... 130 


grimmi (Dikerogammarus). . . . 459 
grimmi (Gammarus). . »..:..2.459 


grubii (Gammarus) . » 2»... . 8379 
grubii (Pallasea) . . . . . . 379, 730 
gryliotalpa (Mierodentopus) . . . . 59 
gryllotalpa (Mierodeutopus) . . . 590 


gryllotalpa (Mierodeutopus) 590, 593 
gryllus (Euryporeia). . ...... 73 
gryllus (Eurythenes) . ..... 73 
gryllus (Gammarus). . .»...... 73 
gryllus (Lysianassa). ». .». ».... 73 
gryllus (Orchestia) . . . .. » ... 540 
gryllus (Talitrus) . . .. . . «55 
gryphus (Orchestia) . . x. .... 545 
N ee RR FEN 12 
a A 717 
BE ER 12 
guerinii (Montagua) . . »..... 19 
guerinii (Stenothoe). . .». .».... 199 
EFICHHOTHER A Ne ers 521 
guernei (Byblis). .. ...-.. 114, 722 
guernei (Gammarus) 462, 733 
guernei (Orchestia) . » ». :» .. 536 
guilelmi (Cyclocaris) . . . . . 31, 717 
guilliamsonia (Bathyporea). .... . 120 
guilliamsoniana (Bathyporeia).. . 120 
guilliamsoniana (Thersites).. . - . » 120 
guilliamsonia (Thersites). . . . . » 120 
Galbarchisia 2 HN en 238 
gulliveri (Talitrus) . . » »... 526 
gulosa (Lysianassa) . » . : »... 74 
gulosus (Anonyx) ., . x... ... 74 
guttata (Protomedeia) . . » ».. - 629 
guttatus (Acanthonotus) . . - » » » 331 
guttatus (Amphithonotus)-. . . . .» 331 


guttatus (Amphitonotüs). » . . . „ 831 
guttatus (Leptocheirus) . . . . . 629 


760 Alphabetical Index 

page page 
guttatus (Nototropis) : - -» . » - 331 | hawaiensis (Parorchestia) . . 558,735 
haasei (Gdammarus) . . .» :» » - - 733 | heibergi (Dexamine). . . ..... 516 
haemobaphes (Dikerogammarus) 458 | Heiscladius. . . 2» 2. ..% 606 
haemobaphes (Gammarus) . . . »- - 458 | Heiseladus . . .. »- BIRPEREPUEN - 606 
Hoakonbosckia ; ;.......8.2:. 080 1 als Zu, ee 675 
Halbroiie x... u a ne 85 1. Hialella 04 2 2 een ee 675 
EN N ER BR], ZUR 398: Bellaiss2 2,3, 2.22. er 521 
Malieniden 7 een 221 | helleri (Allorchestes) . . . . ,... 575 
Halicreion EEE SENEEER 247 | helleri (Eiyale): - =. 3.0 mia #238 578 
Halierion +. 222.8. 2.0.88 % . -.. 247 | helleri (Rhachotropis).... - . . . B5l 
nmdan „u, al re 249,255 | helleri (Rhachotropis) . . .: . . . 352 
REITEN 290 | helleri (Tritropis) . . :. -»»...» 351, 352 
Kelisagon 5 Sr a 304 | helvetiae (Eusirus) -. ».: 2.2... 341 
Hallragoiden ... 4.0... 4 303 | helvetioe (Eusiru) .».. . er, DR 
Helirhages . . . .r...u.. 00 ne 794 | herdmani (Platyischnopus) . . . 722 
hamatipes (Argissa). ... - » - 277 | herdmani (Podocerus) . . .».... 653 
hamatipes (Syrrho@). . . » » » » . 277 | heteroclitus (Pephredo) .... .» . 715 
hamifera (Colomastix). -. . . . - 207 | Heterogammarus . . ..2....% 494 
hamifer (Colomastix) . - .». .»: »- » 207 | heuglini (Amathilla). .. . .... 381 
hamigera (Maera). . . .» . .» . » 4387 | heuglinii (Amathilla) . » :.... 381 
hamigera (Moera). . ». 2... 437 | heuglini (Wayprechtia) ..... . 730 
hamulus (Amphithoe) . ...... 645 | heuglini (Weyprechtia) .. . 381,730 
hamulus (Sunamphithoe). . . . 643,645 | Hippias . .» 2... 2... . 795 
hamulus (Sunamphitoe) . ... » . 645 | Hippomedon  ..„ sn... ..% 42,65 
hamulus (Synamphithoe). . . . . - 845 | Eippomedeoen‘ . sry 58, 719 
hanseni (Anamixis).. . ».. . . 170 |; Hirondella. . 2.2.2.2... ee? 
hanseni (Monoculodes) . . . . . 29:3 imondellen. ru. 16 
hanseni (Orchomene) . . ». ... 46 | hirondellei (Maera) . . . .... 732 
hansoni (Cheirimedon) . . . . . 720 | hirsuts (Grubia) : » 2.2... 738 
Maploeheira: 5. reinlesen 609 | hirsuticornis (Dereothoe) . .. . . 605 
haplocheles (Kroyeria). .. . - 242,243 | hirsutieornis (Dercotho& (Cerapus)). . 605 
haplocheles (Pontoerates) . . . . - 243 | hirsutiecornis (Dulichia) . ..... zıl 
haplocheles (Synchelidium) . . . 242 | hirsuticornis (Gammarus). . .. . - 605 


haplocheles (Synchelidium) . . . . 243 


N ee re EERESNAR 609 
ne Kara 720 
BEBDIOODE. 2.0 e 116, 722 
Harmomia . . „nn mie 383 
ER a ee 383 
BEBLIIDR a 140 
BRD an a nie 140, 723 
Herginioides . . ... 2.0.00 3. 298 
BEREIBOdBE ia ie 298 
hastata (Tessarops) . . ......» 276 
haswelli (Amaryllis) . ..... 23 
haswelli (Cyrtophium) . .. . .. » 704 
haswelli (Liljeborgia) . . . : . » -» 233 
haswelli (Maera) . .. : 2... ...648 
haswelli (Megamoera) . . ....» » 442 
haswelli (Mierodeutopus) . . . . 591 
haswelli (Nicippe).. . -..... 233 
haswelli (Wyvillea). ...... 648 
Haustorlidae. 2. 4% 118 
BHaustorius u ae 124 
hawaiensis (Allorchestes). . . . » - 573 
hawaiensis (Hyale) .. . . ...... 578 
hawaiensis (Orchestia). .. . . ...» 558 


hirsuticornis (Mieroprotopus) i «605 
hirsutimana (Protomedeia). #_. . . 627 


hirsutimanus (Leptocheirus) te A 


hirsutimanus (Protomedeia) . . . .. 627 


hirsutimanus (Ptilocheirus) . . » „ . 628. 


hirsutipes (Lembos). . 
hirsutus (Eurystheus). . . . 615,737 


hirsutus (Eurystheus) . . .».. - 737 
hirsutus (Gammaropsis) ». » » - . - 615 
hirticornis (Dulichia) . . . . - - 7ıl 
hirtipalma (Allorchestes) . ... . 564. 
hirtipalma (Hyale) .. ..... 564 
hirtipalma (Hyale (Allorchestes)) . . 564 
bispans. {Opis).:.. ou. el ya a 22 
hispana (Opisa). ..»- -.v. .. 22 
hispana (Sophrosyne) TR 
hoeki (Barentsia) ..» ». .... 238 
hoeki (Gulbarentsia) . . ..» - 238 
hoeki (Podocerus) . ». x... ...- 661 
holbölli (Anonyx) . -» 2.2.» 58,59 
holbölli (Hippomedon) ... . - 58 
holbelli (Hippomedon) . . . . . 59,69 
heibollii (Phase) 4... .=..%..0: aa ;6. 154 


holbölli (Lysianassa) . . . 


Alphabetieal Index 


" page 
holbölli (Phoxocephalus) . . . . 134 
holbölli (Phoxus) . .. . . ET . 
holmii Eusirus) . ». »...... 342 
homari (Amathilla) . . . - 387,387, 392 
homari (Astacus) . ». 2... ...- 387 
homari (Oancer (Astacus)) . .» » . - 387 
homari (Cancer(Gammarellus)) . . . 387 
homari (Gammarellus) . . . . . 887 
homari (Gammarellus) .....- 388 
homari (Gammarus) . .».....-. 387 
homoehir (Atylus) ...:.... 333 
homochir (Nototropis) . . . - - 333 
hopei (Callisoma) ...... .» » 62,62 


hopei (Scopelocheirus) . . .» . .. 62 


Be ran 73,75 
höaringii (Tryphosa). ..... . 71 
Ve 728 
hornelli (Leucothoe) . . .. . - 724 
hörringii (Tryphosa) ....... 71 
hörringii (Tryphosella)..... . . 71 
hoyi (Pontoporeia) . ..:...». 128 - 
humeralis (Amphithoe) . . .. ..- 636 
humeralis (Ampithoe).. . - 636 
humicola (Orchestia) . . ... . 539 
humilis (Allorchestes) . . . . . 584 
Blie CRROBNE en 45 
humilis (Lysianassa) ...... . 45 
hunteri (Cerapus) . .. . 2. ... 673 
hunteri (Erichthonius). . . . . ER 3} 
hunteri (Eriethonius) . . . . 673,740 
huxleyana (Acanthozone) . . . ..- 291 
huxleyanus (Atylus) .. ...... 291 
huxleyanus (Halirages) . . .. - 291 
huxleyanus (Halirages) ... : . . 292 
hyaeinthinus (Gammarus) 475 
ee ee 559, 735 
a a 584 
Blale ne 574, 736 
NN EEE RER 374 
hyalina (Westwoodilla) . ....». 250 
Hyperiopsidae....... ...114 
EDORIOHBIR.: nee 714, 741 
hystrix (Acanthosoma) . ..... 325 
hystrix (Acanthozone). . - . . 324, 325 
bystrix (Amphithoe) . ...... 325 
hystrix (Boeckia) . . ... . n 391 
hystrix (Cyrtophium) . . ..... 697 
hystrix (Laematophilus) . . .»... 697 
hystrix (Laetmatophilus) 697 
hystrix (Paramphithoe) . . . . . 325 
ibex (Echinogammarus) . . .. . 492 
Sabex (Gsmmarıs) - .u3'2:, „055 492 
BRENODRME. ae ee a 52 
Ainopün si... ee 86 
lehthyomyzocus  .......,... 208 
ee SP 706 
en PR | 


761 

page 
ER ER . 230,231 
DB eye 234 
N a FRE .. 234 
ignotus (Gammarus). ». ».. 2... 495 
ignotus (Heterogammarus) 495 
imbricata (Graya). . . . 2.2. 387 
imbricata (Grayia) . . 2.2...» 887 
imbricats (Hyale) . 2,7. 2... 568 
imbricatus (Allorchestes). . . . 568, 578 
imparicornis (Leucothoe). .. . . . 167 
imperfectus (Niphargus elegans var.) .. 409 
impostii (Gammarus) . ...... 435 
inaequalis (Orchestia). . ... . 542 
inaequimanus (Gammarus) . . . . . 425 
inaequipes (Amphithoe) ..... . 435 
inaequipes (Maera) ....... 435 
inaequistylis (Amphito& (Melita)) . . 429 
inaequistylis (Melita)). . . 429, 732 
inea (Allorchestes) ........ 564 
incerta (Hornellia) . . ..... 728 
iuserta (Mvers) 2. 2... 24. 445 
incerta (Podoprionides) . .... . 741 
incerta (Unciola) ........ 681 
ineisa (Acanthozone) .-...... 287 
ineisa (Leucothoe) . .... 167, 724 
ineisimana (Orchestia). - .... . 540 
ineisus (Chosroes). . .. .... 287 
ineonspieuum (Platophium). .. . . 702 
inconspicuus (Podocerus) . . . . 702 
inda (Amphithoe). . . .. 2... 640 
1988 (Ampithoe) 2.20.00... 640 
indiea (Amphithoe) . ....... 640 
indica (Amphitoe). -.. . 2... 640 
IBdiea(MBEL8). ie, 440 
indica (Megamoera) . . . ..... 440 
indieus (Anonyx) .. ...... 86 
indieus (Gammarus) . . ..». 2... 440 
inermis (Allorchestes dentatus var.) . 578 
inermis (Amphilochus). .. .».. - 154 
inermis(Amphithoe). ... ..... 359 
inermis (Atylas).. : - nie:a are 359 
inermis (Epimeria) .. ..... 128 
inermis (Gitanopsis) . . . ... 154 
inermis (Halirages) . - ». » : ... 303 
inermis (Haliragoides) . . . -. » - 803 
inermis (Hyalella) . -..... 578 
inermis (Paramphithoe) . . ..» .- 359 
inermis (Pontogeneia). . . -. - - 359 
inflata (Rhachotropis) . . .. . - 351 
Na 1) ee er 351 
inflatum (Acanthonotosoma) . . . - 219 
'inflatum (Acanthonotozoma). . 219 
inflatus (Acanthonotus) . . ..» » » 219 
se CAbvlas) u... 01. u a 399 
inflatus (Gammarus). . . . . 399 
inflatus (Mieruropus) . . ... » 399 


inflatus (Stegocephalus). . . . - 91 


762 
page 
inflatus (Vertumnus) . .» .» 2... 219 
ingens (Ampelisca) . .: .. . $ 100 
ingens (Jassa). . ». - : - 658 
ingens (Podocerus) : . » . .- .. 653 
ingens (Pseudophthalmus) . . . . » 100 
ZUEOBA a et 726 
Inzui1Hellldae:. 7275227 725 
innominata (Seba). :. . ..... 162 
insatiabilis (Melita) . .. .».... 741 
inseulpta (Orchestia (Talitrus)) . . . 527 
inseulptus (Talitronus). . . . .. . 527 
insignis (Elasmopus) . ..... 732 
insignis (Tryphosa) . ...... 69 
integricauda (Ambasia) . . . ... 85 
integrieauda (Nannonyx) . . . . 535 
integrimana (Maera). .. ..... 435 
intermedia (Amphitho@) . . . . . . 738 
intermedia (Ampithoe) . . . . . 738 
intermedia (Protomedeia) ß 621 
intermedium Eyncheläiun). 243 
intermedius (Amphilochoides) . 153 
intermedius (Byblis). . . .»..... 113 
intermedius (Cheirocratus) . . . 419 
intermedius (Gammarus smaragdinus 
1 2 DET a rg 398 
intermedius (Paroediceros) 245 
intrepida (Allorchestes) .. .. . - 581 
invalıda (Metopa) 22.3, 0.70% 182 
Re 447 
IDHISBENDHaE 2 2 447 
EN ES gr ee 204 
TONIDadIB. 7.2... 2 nes 214 
T5n1m641088.,.,.%.:... 327 0% 210 
EURER EHE 210 
Tolımiedkomeis 2-0 3. 21l 
Ipiinarun 1:2, Rn 204 
TORSRIBLBIRN NN NER THE 203 
a a 680 
itroraks: (Dryope) ; .7.,.7. 572728; 680 
irrorata (Uneiola)'. 67 7, 678, 679, 680, 681 
irrorata (Undiola) - 42% 678 


irrostrata (Urothoe) 129, 130, 130, 131,131, 
131, 132, 146 


irrostrata (Urothoe). . . ... . 132 
irrostratus (Urothoe) . .». .. ... 132 
N 2 RE REN ET NEE 630 
ABRGIAHB.. ne 630 
IBSsInan: „EU 650 
ischnus (Gammarus) . . .... 470 
Jachyrocaras SE 796 
Ischytoeeridas.. : Am 2 5% 647 
ISsehyrocerüß: 20 en 657, 739 
Jöchyrocerus. nt een 602 
Tnopaa 2 Ta ae Das LT 630 
BE GERA I WE 796 
180108. u 796 
isopus (Podocerus) . .. :.... 658 


Alphabetical Index 


page 
istrica (Amphithöe (Hyale)) 584 
Istrien (Niose) ".. 0. ie ee ee 584 
istrieus (Allorchestes) . . . . . . 584 
JUBEL, 2.2220, ER rt 649 
japonica (Allorchestes) .. ... . 584 
japonieca (Ampelisca) ...... 111 
Japonica (Amphithoe) .. . .... 638 
japonica (Ampithoe). . . .... 638 
japonicus (Allorchestes) . . . - - 584 
ER a EEE Te 649 
RE 1 RN NE Nr 652, 759 
N RR 647 
JOEt CHIYRBB)T 2.0 ee een . 578 
jelskii (Hyale (Allorchestes)) . . . . 578 
jelskii (Hyalella) . .. .. . a 578 
jurinei (Amphithoe). . .. 2... 307 
jurinei (Apherusa) . . .» .. .. 307 
jurini (Amphithoe) . ....... 307 
jarinii (Apherusa). . . ». 2... 307 
jurinü (Pherusa) ....... : 307 
kallarthra (Byblis) °. 2 %2722,.:% 115 
kallarthrus (Ampeliseca) . . ... » 115 
kallarthrus (Byblis) . . . ..... 115 
bt a 721 
Barguplenia. ea 11 
kergueleni (Acanthozone) ..... 349 
kergueleni (Acontiostoma) . . - - . 16 
kergueleni (Amphithoe) . . .. . . 638 
kergueleni (Ampithoe) . . .. . 638 
kergueleni (Anonyx). . » » »... 69 
kergueleni (Aora). . . 2. 1.°.%% 587 
kergueleni (Autonoe) ....... 598 
kergueleni (Hippomedon) .. . . . 69 
kergueleni (Hoplonyx). . ». ...» » 720 
kergueleni (Lembos) . ..... 598 
kergueleni (Lysianassa) . .». .».. 69 
kergueleni (Phoxocephalus) . 135 
kergueleni (Phoxus). . . »... . 135 
kergueleni (Rhachotropis) . . . . 349 


kergueleni (Socarnoides) . . .. 47 


kergueleni (Tritaeta) . ..... . 520 
kergueleni (Tryphosa) 69, 720 
kergueleni (Zaramilla). . . .. . 36l 
kermadeeci (Podoceropsis) . . 619 
kervillei (Parametopa) . : .. . 725 
kesslerii (Amathilla). .. ..... 378 
kesslerii (Dybowskia) . . .». ... 730 
kesslerii (Gammarus) . . .»..... 378 
kesslerii (Pallasea) . ... . 378, 730 


kesslerii var. europaeus (Gammarus) 877 
kesslerii var. europeus (Dybowskia) 730 


kessleri (Stegocephalus) . . . . . . 90 
kidderi (Lysianassa) . . ». .» 2... 36 
kidderi (Nannonyx). . . .... 36 
kietlinskii (Gammarus) . . . . . 469 
kinahani (Liljeborgia) . . . . - .- 233 

233 


kinahani (Lilljeborgia). . . » » . » 


Dal re at 5 TE nr 


RES 


R 
2 
3 
N 
} 

j 
k 
N 


Ex Sr ae 
Ba FR 


ie, ar r EN 


Alphabetical Index 


. ‚page 
kinahani (Phaedra) . . .».....-. 233 
klukii (Atylus) . . 2»... - PH 
klukii (Gammarus) . » . 2... 403 
klukii (Mieruropus) . . »- » . - .» 403 


knickerbockeri (Allorchestes). . . . 575 
kochianus (Niphargus) . . . 408, 731 
korotneffii (Acanthogammarus) . 734 


korotneffii (Polyacanthus) . - . - - 734 
N ee 258 
er er ih 
kröyeranus (Siphonocetus) . . . . » 684 
kröyeranus (Siphonoecetes) . . . 684 
ee 258 
mer (Anonyz) . 2... +». %% 62 
kröyeri (Callisoma) . . ...... 62 
kroyeri (Ephippiphora) . ... . 087 
kroyeri (Gammarus) . . » 2 2... 436 
kröyeri (Glauconome) . ». .».... 679 
 kröyerii (Gammarus) . . .:.... 472 
Bye (PROZOB). ev a 136 
kroyeri (Lysianassa) . - » » » . . 86,57 
ser (Meere). ei 436 
kröyeri (Megamoera) . ..... - 436 
kröyeri (Monoculodes) . . . . . 261 
Beyer (Phozus) 12%. u. 134 
kroyeri (Socarnes) . . ..... 57 
kuhliana (Secamballa) . . ..... 545 
kükenthali (Anonyx) . » ..... 54 
kürgensis (Amathilla) . . ..... 440 
kürgensis (Gammarus). - » ». .» . 440 
kürgensis (Maera) . . ..... 440 
a nr TR 
kuriensis (Hyale nilssoni var.) . . . 736 
kusnezowi (Gammarus) . ».... 413 
kusnezowi (Gmelina) . . ... . 413 
labbei (Acanthogammarus) . . . 734 
lacertosa (Amphithoe) ..... 633 
lacertosa (Ampithoe) . . .... 633 
lachneessa (Urothoe) ...... . 132 
lachneössa (Urothoides) . . . . - 132 
laeteus (Gammarus) . . 2... .. 410 


laeustris (Gammaracanthus). . . 507 
lacustris (Gammaracanthus loricatus 


a EP LE 07 
laeustris (Gammarus) . . .. . . 474, 733 
en 5 NER 741 
ladmiraulti (Niphargus). . . .. 731 
Bsemsatophilus "1. uni 695 
Laetmatophilus . . . » 2... ..69 
eimophbilas ..... ee 695 
laeve (Cyrtophium) . . . .... 698 
laeve (Platophium) : .. ... - 704, 741 
laevigata (Ampelisca) . . . . . 100, 110 
lJaevis (Apherusa) . . .. .... 308 
laevis (Dexiocerella). . . . 2... 704 
laevis (Busirus). . . . ..... 729 


laevis (Gammarus) 


763 

page 

laevis (Guernea) . ..»... 521, 735 
laevis (Haploops) . . . ..... 117 
isevis (Harpinia) . . 2... 145 
lasvis (Orchestia). . 2, 2.2. 531 
laevis (Orchomenella) . . . .. . 8l 
Iuavis (PHOrOBB) 0 308 
laevis (Podocerus). . ... . 704, 741 
laeviuscula (Acanthozone) . . . 296, 297, 
304, 307 

laeviuseula (Amphithoe) .. . .. . 296 
laeviuseula (Amphithopsis) . . . . . 296 
laeviuseula (Calliope) . .». ». ». .» .» 296 
laeviusceula (Gmelina). . . . .. 413 
laeviuscula (Paramphithoe). . . - . 296 
laeviusculus (Calliopius) 296 
laeviuseulus (Calliopius) . . .» .. . 296 
Hafystildae,; m. Dr 208 
TBEVBHUBSS TEN WS a era 208 
lagena’(Anonyz): 372... 74% 54 
lagena (Anonyx) . .»:...... 54 
lagena (Lyeianassa) . . ». .» »...- 54 
lagena (Lysianassa) . . ..... 54, 54 
lagowskii (Ceradocus) . » » .. .» » 498 
lagowskii (Gammarus) . . » : .» 498 
lagowskii (Parapallasea) 498, 733 
lagowskii (Pleuracanthus) . . . . . 733 
5 ar jr + 587 
DT BR 2 ir 587 
EN er 517 
a er 286 
IAOTEOOB 2 ae Ve es 286 
Bapkyssiidse SFr a ee 208 
Laphystiopsidae. ...... 209 
baphystiopsis 7.22 209 
Baphyatine: 208 
largimana (Amphithoe) . ..... 644 
largimanus (Podocerus) . 644 
tata (Brandtiay 2.2... 22235 396 
latibrachium (Elasmopus).. . 733 
laticorne (Acidostoma) . » . . - 14 
laticornis (Acidostoma) . » »... 14 
laticornis (Uneciola) . . ..... 677 
latimana (Hyalella) . ...... 577 
latimana (Metopa) . ...... 177 
latimana (Normanfd) . »..... 67 
latimanus (Allorchestes) . . . . . . 577 
latimanus (Cerapus) . . -. » 2... 671 
latimanus (Cheirimedon) 67 
latimanus (Hyalella) ....... 577 
latimanus (Monoculodes) 264 
latimanus (Oediceros) . . . - 264 
latior (Gammarus) .... v2... 396 
latipalpus (Atylopsis) . . . . . - 727 
latipes (Acanthozone) . 817, 318,319, 319 
latipes (Aceroides) . .. .. - - 255 
latipes (Aceropsis) . » » 2... 255 
latipes (Amphithoe). . ». .».... 317 


764 
page 
latipes (Amphithopsis). . . « . . . 817 
latipes (Elasmopus) . » » » 2... 444 
latipes (Halicreion) ©.» 2... 255 
latipes (Harpinia). . - . - ; 723 
latipes (Ischyrocerus) . . . - - 660 
latipes (Parapleustes) . . » - -. 817 
latipes (Podocerus) . x... - 656, 660 
latipes (Sympleustes) . . : . . - 817 
latissima (Brandtia). . . : - - . 396 
latissima (Pontogeneia) . .». :. . - 396 
latissimus (Gammarus). . .  ... -» 396 
latrans (Oediceros) . ». .» -» »» .» 245 
latrans (Oedicerus) - » » . 2... 245 
latreillii (Gammarus) . ». 2... 376 
Bu Are ee 396 
iatus (Gammarus)'; =... . ee 396 
latus (Stegocephalus) . . . .- . . 97 
leschii (Oaliape) ...:.. « ... #4 296 
leachii (Cerapus) - -. . » 2.2... 673 
leachii (Podocerus) . » » 2... 672 
LSIDBULODUB: „ren ei 698 
Lemboides . . .. u... ER '.) 
BR a 5 Rn Male 588 
DEBBBEE HN. ea 594, 757 
.lendenfeldi (Corophium) . » . » . -» 609 
leonis (Melita) . .» .».» . Sr 741 
ANDIGBERTER. ee a 124 
Eammasebylus ss Nana 796 
Lepidepecreum . . . 2... .% 78 
Iopleurus. . nat ers Kr 715 
lepta (Ampelisca) -. ... .. . Pen 
Papa TREU, FE. 115 
Ieptamphopus. 52,25 2933 
leptocarpa (Metopa)... ..... 178 
leptocarpus (Eusirus) . . . . .. 341 
leptocerus (Echinogammarus) . . 490 
leptocerus (Gammarus) » » . :. - 490 
leptocerus var. nematocerus(Gammarus) 490 
MEDtoch@lruß u. Atari 625 
Ieptochela.; „an ern 19,19 
leptochela (Opis) . =... 2... 19 
Dastoohirns 2 ae ee 625 
leptonyx (Amphithöe (Amphitonotus)) 517 
kilkonyx (Atylas) m: ll; 517 
leptonyx (Dexamine) . .: ... 517 
Lptophozus: a Satire een 136 
DRSIIBBB 2 re 433 
leueopes (Uneiola) . .».... 678, 679 
leucophtalmus (Hoplonyx) . . . » . 720 
leucophthalma (Rhachotropis) . . 353 


leueophthalmus (Hoplonyx) . . .. 76 
leucophthalmus (Tmetonyx).. . 76, 720 
leucopis (Anonyx (Onisimus)) . . . 28 
leueopis (Glaueonome). . . 2... 
* leueopis (Önesimus) . » 2 2... 28 
leuceopis (Onisimus). . . 2.....328 
leucopis (Pseudalibrotus glacialis var.) 718 


- page 
leucopis (Unciola) . ...... 678 
MBUaHtHo0. ee 163, 724 
Keupothaidae. . ii 161 
Koneothoides . wu 161 
Leusothoine. nu ya 161 
Leueothoinae. . v2. 20a. 161 
leris (Amphithonotus) . . » .. » - 741 
less (Moera) ; «441400 ne 443 
Bun ASyErhoB). 2 0.25 281 
levis (Syrrhoites) . . ». 2... ..281 
Iskeborgia u 2 417 
Eseborgie nn RER 230 
Bijehorgiiuaa... weni 229 
illiebasih. x mars 230 
Hlljeborgii (Anonyx) . ..... 5> 
lilljeborgii (Leucothoe) . . 167, 724 
limieola (Ampelisca) . ..... 111 
limieola (Orchestia) . . 2.» .... 547 
limicola (Pseudophthalmus) .... . 111 
limicola (Talorchestia) . -. ... 547 
limieolus (Pseudophthalmus) . . . . 111 
limnaeus (Gammarus). . .... 733. - 
lindahlii (Podoceropsis) . . . . . 619 
lindahli (Podoceropsis) . x»... - 619 
lindströmi (Bathyporeia) 122 
linearis (Astacus) . . -» - . rc 686 
lineata (Cyproidea) . . 2. ..°0.. 160 
lineata (Cyproidia) ». ». 22... 160 
lineata (Paracyproidea) . . .. . 160 
kippus (Atylus) sie aan en 346 
lippus (Eusiroides) . . .:.... 346 
BASISTONSIdE er 8 
Siisijanassipii. u er 8 
litoralis (Alibrotus) . . . ». » ’ 33 
litoralis (Anonyx) «2. 2.0... 33 
litoralis (Lysianassa) . » » » 2... 33 
litoralis (Onesimus) . » » 2.2... 33 
litoralis (Onisimus) . » 2». 2... 33 
litoralis (Pseudalibrotus) . . . . 33 
littoralis (Alibrotus). - . 2. ... 33 
littoralis (Allorchestes) . . . 585,736 
ittoralis: (Anaaya) nn 33 
littoralis (Atylus) . u. ..0u..0% 401 
littoralis (Gammarus) . » ..... 401 
littoralis (Hyale) .. 22... 585, 736 
littoralis (Ingolfiella) . ..... 726 
littoralis (Mieruropus) . .... 401 
littoralis (Orchestia) . . » » .»... 532 
littoralis (Psammylla) . ..... 716 
littoralis (Pseudalibrotus) . . . . 27,28, 33 
Yitoralia ZRalitrus)i schen 525 
littores (Orchestes) . . 2.2... . 532 
littorea (Orchestia) 532, 583, 534, 542 
BitoreusfAstacme)... .. zu na 532 
littoreus (Cancer (Gammarus)) . . . 582 
littorina (Amphithoe) . . 2.2... 689 
littorina (Amphitoe). . . 2... 639 


u hen a a 


lividus (Eehinogammarus) . RISSE 


lividus (Gammarus) . . » -» 2... 483 
lobata (Dexiocerella) -. ». - »... » 703 
lobatum (CGyrtopbium) . . 2... 703 
lobatum (Platophium) . . » ...» . 703 
lobatus (Podocerus) . . » . » - 708 
Lockingtonia . .-..... EEE), 
loeusta (Cancer)... » 2... 476, 525 
locusta (Cancer (Gammarellus)) . . . 525 
locusta (Cancer (Gammarus)) . . . . 476 


loeusta forma mediterranea (Talitrus) 525 
locusta (Gammarus) 234, 234, 415, 446, 159, 
463, 463, 473, 493, 513, 518, 518, 525 


loeusta (Gdammarus) . . .. ....476 
loeusta (Oniscw) . . » .... wu.» 525 
Joeusta (Talitrus) -.. . 2... 525 
loeustoides (Gammarus) . . 2... - 472 
Eeachömerns ar. ar 587 
longieauda (Gammarus) . . . . 410,429 
longieauda (Maera) . . » 2...» . 429 
longicauda (Megamoera). . ...» - 429 


longicaudata (Acanthozone) . . 289,316 
longieaudata (Amphithopsis) . . 289 


longicaudata (Photis) . . . . - » 608 
longieaudatus (Eiseladus) . . . . - 608 
longicaudatus (Gammarus) . . » » - ‘410 
longicaudatus (Haliereion) . . - . . 247 
longicaudatus (Heiscladius). . . » . 608 
longicaudatus (Heiseladus). . . . .- 608 
longieaudatus (Niphargus) . . . 410 
longicaudatus (Niphargus) . . . . - 410 
longieaudatus (Photis). . .... . 608 


longicorne (Corophium) . » » » . . 686 
longieorne (Lepidepecreum) . . . 80 


longieornis (Allorchestes) . . . . . 574 
longiecornis (Amphithoe) . ». . . . . 644 
longieornis (Amphithoides) . . . 645 
longieornis (Anonyx) 799,79, 80 
longieornis (Byblis) . . . .... 113 
longicornis (Gammarella) .... . 449 
longicornis (Gammarus) . . 498,513, 686 
longicornis (Grubia). . . .... 738 
longicornis (Lysianassa). . .. . 39 
longicornis (Lysianassa) . . . . - 45,53 
longicornis (Lysianassina) . . . . . 39 
longieornis (Lysianax). . -» ».. . 39 
longieornis (Metopa) . . .... 179 
longicornis (Monoeulodes) . . . . . 258 
'longicornis (Monoculopsis) . . . 258 
longieornis (Montagua) ...... 200 
longieornis (Nicea) . . 2... . 561 
longieornis (Örchestia). . . . . 549, 566 
longicornis (Podocerus) . . . . 660,644 
longicornis (Scamballa) . . . . . . 549 
longicornis-(Sunamphithoe) . . . . - 643 
longieornis (Talitrus) . .. ... . 549 


longieornis (Talorchestia) . . . . 549 


Alphabetical Index 765 


r page 
longieornisvar.polyarthrus(Gammarus) 493 
longidigitans (Autonoe) . .» 2... 594 
longidigitans (Lembos) . . . . - 594 


longimana (Acanthozone) 293, 294, 307, 308 


longimana (Amphithoe) 634, 788 
longimana (Amphithopsis) . . . . - 293 
longimana (Ampithoe).. . . 634, 738 
longimana (Kuria). . . .... 726 
longimana (Megamoera) .. . .. . 438 
longimana (Metopa). . ... - 184, 185 
longimana (Metopella). . . . . . 185 
longimana (Montagua). . . . . 200 
longimana (Oradarea) . . . . . . 727 
longimana (Photis) . . ....... 738 
longimana (Protomedeia) . .» . . - 621 
longimana (Stenothoe) . . . . . . 200 
longimana (Wyvillea) .. .... 648 
longimanum (Probolium) . » . . . » 200 
longimanus (Amphilochoides) . . 723 
longimanus (Amphilochus) 151, 723 


longimanus (Bathymedon).. . . . 257 


longimanus (Cerapus) . ..» 2... 673 
longimanus (Eurystheus) . . . . 616 
longimanus (Gammaropsis) . . » » - 616 
longimanus (Gammarus) . . . -» ». 438 
longimanus (Halimedon). . . . . » 257 
longimanus (Hippomedon) . . . 60 
longimanus (Kuria) . 2. ...» 726 
longimanus (Leptamphopus) . . 293 
longimanus (Microprotopus). . . 605 
longimanus (Monoeulodes) . . » . . 237 
longimanus (Oediceros) 237,238, 258 
longimanus (Paranaenia). . . . . . 616 
longimanus- (Perioculodes) . . . 237 
longimanus (Photis) . . ... 2...» 738 
longimanus (Platamon) . . ....» 60 
longimanus (Podocerus) . . ... . 648 
longimanus (Wyvillea). . ...... 648 
longipalma (Hyalella). .. .. . 577 
longipalmus (Allorchestes) . . . - . 577 
longipalmus (Hyalella). . » :..» . 577 
longipes (Allorchestes). . . » -» - « 576 
longipes (Anonyx) ... . 2» 2... 77 
longipes (Autonoe) 593, 596, 597, 598, 598, 

= 599, 601 
longipes (Cerapopsis) . . . : ..« 674 
longipes (Cleonardo) . ». .» .. . 847 
longipes (Eusirus) . .. . 2... 340 
longipes (Eusirus) . . »...... 341 
longipes (Gammarus) . .. 2... 597 


longipes (Gammarus (Gammaropsis)) . 597 


longipes (Hyalella) . ...... 576 
longipes (Lembos) . ..: .:.».. 597 
longipes (Melphidippa) . » . . . . 337 
longipes (Mierodentopus) . .« . . 597 
longipes (Pontogeneia). . » .» .» - . 847 


longipes (Tryphosa). ....... 77 


766 Alphabetical Index 
page page 

longipes (Tryphosites). . - . . - 71: | mineer KAtylas) 12:2 23: 0 9rin 837 
longirostris (Monoculodes) . . . 260 | macer (Ceradocus) . .» » 2... ..837 
longirostris (Oediceros) . » . .. . 260 | macleayana (Orchestia) ....». . 538 
longirostris (Peltocoxa) . . ».. . 159.1 Mala 5. Reue 648 
longirostris (Stegoplax) . . . - - 159 | macra (Melphidippa) . »..... . 337 
longistila (Hyalella). ...... 577 | macra (Melphidippella) . . . » . 837 
longistilus (Allorchestes). . . . - - 577 | macrocarpa (Photis) . .... . 607 
longitarsis (Lalaria). . ...... 587 | macerocarpus (Photis) .. »....» 607 
lophii (Dermophilus) . .. .... 208 , macrocephala (Ampelisca) . . . 101 
loricata (Epimeria) . - ....». 322 | macrocephala (Amphithoe) . . . . 306 
loricata (Lysianassa) . . ..».. 39 | macrocephalus (Dikerogammarus) 458 
lorieatus (Ceradoeus) . . . 2... 508 | macrocephalus (Gammarus) . . . . 458 
lorieatus (Gammaracanthus) . . 508 | macrocheir (Oediceros) . . .» - » - 245 
lorieatus (Gammarus) . . .. . 507,508 | macrocheir (Oedicerus) . . .... 245 
lorieatus var. lacustris (Gammar- macrocheir (Paroediceros) .. . 245 

Atanthun. 2 aan 507  macrodactyla (Hyale) . . . . 564, 736 
loughrini (Dexamine) . ...... 330 | macrodaetylus (Cerapus) . . » » . . 672 
loveni (Gammarus) . . .. 2... 438 | macrodactylus (Erichthonius) . . 672, 740 
lovenii (Gammarus) . . 2... 378 | macrodactylus (Eriethonius). 672, 740 
lovenii (Pleuracanthus) .... . . 730 | macrodactylus (Hyale). . . . . 564,736 
10v8n1- (Maers) 68 een 438  macrodaectylus (Pyetilus). . . .. . 672 
USERLAMOHER) 2 es 438 | macrodactylus var. pontica (Cerapus) 673 
lubbockiana (Galanthis) . . .. . - 568: | Macrohectopus . .... 2...» 394 
lubbockiana (Hyale) -»...... 568 | macronyx (Autonoe) . » 2.2... 623 
lubbockiana (Nicea). .:..... 568 | macronyx (Gammarus (Gammaropsis)) 623 
lubomirski (Hyale) .. ...... 579 | macronyx (Hyale) ... 2.2... 570 
lubomirskii (Hyale (Allorchestes)) . 579 | macronyx (Liljeborgia) . .. - - 231 
lubomirskii (Hyalella) ..... 579 | macronyx (Lilljeborgia) . . » - - » 231 
eh A ICaI rt 566 | macronyx (Mierodentopus). . . » . 623 
lueidus (Sperchius) . .. ...». 716 | macronyx (Microdeutopus) . . « . . 623 
lueifugax (Allorchestes) . . ... . 576 | -macronyx (Nicea)...... 2... ‚570 
lueifugax (Hyalella) ....... 576 | macronyx (Orchomenella). . . . 721 
lueifugus (Apocrangonyx).. . . . 370 | maeronyx (Synopioides) . . . . 227 
lueifugus (Crangonyx) . . . : .. . 370 | macrophthalma (Amaryllis). .. 24 
ET NE RE Re RE TE 715 | macrophthalmus (Amaryllis) . . . 24,24 
iatkanı (Eholie). u 608 | macrophthalmus (Amathilla) . . . . 506 
TR 2 2 a HE 163 | maerophthalmus (Carinogam- 
ET 7 RER RE ER FRTUSTER 37 3 1) VRR ee ee 506. 
lynceus (Oediceros) 245, 245,246, 246,246 | macrophthalmus (Ceradoceus) . . . . 506 
lynceus (Paroediceros) . . . . . 246 | macrophthalmus (Gammaracanthus) . 506 
Iytlanassa 5.2.50 37,718 | macrophthalmus (Gammarus). . . . 506 
INNERER 85 | macropus (Rhachotropis) . . . . 352 
Lysianassidae ........ 8 | macrura (Melphidippa) . . . . - 336 
TE BREMEN. ea a 8 | macrurus (Gammarus) . ... . 464 
USMIRDREBIne 2,21, 8,88 | maculata (Amphithoe). . .».....» 641 
Lana 87 | maculata (Ampithoe) . .... . 641 
UYSIARBENIUAR u 8 | maculata (Protomedeia) 605, 605, 615, 617, 
N NE re wer 87 657 
Lyslanelar sn an: . 38] | maculatum (Synchelidium) . . . 242 
Lysianopsis Wan 718 | maculatus (Eurystheus). . . . - 617 
Lysisssidäes: na 8 | maculatus (Gammaropsis) . . »- » . 617 
Irina EN 715 | maculatus (Gammarus) 426, 617, 618. 
maackii (Echinogammarus) . . . 483 | maculatus (Mierodentopus) . . - . 587 
maacki (Gammarus) ..-..... 483 | maculatus (Mierodeutopus) . . . . . 587 
macera (Dulichia). . -...... 710 | maculatus (Mieroprotopus) . . . 604 
macera (Melphidippella) ...... 337 | maculatus (Mieroprotopus). . . » - 605 
macera (Palasiella) -. ... 2... 412 | maculatus (Paraphoxus) . . 138,723. 


FB Eee ea Pitt et ein ans nr 2 ae Linde 
ae HR LSCh Se a TE N 


Alphabetical Index 767 

page page 

maculatus (Phoxocephalus) . . . . 138 | marmorata (Talorchestia) . . . ... 536 
maculatus (Phoxus) . . » ». +»... .138 | maroubrae (Hyale) . ...... 563 
maeoticum (Corophium). .. . . 740 | martensi (Anonyx) . . -..... 87 
maeoticus (Gammarus) . . . » .- 467 | martensii (Örchestia) - ...... 553 
Er En Se a EN 433, 732 | martensii (Talorchestia). ... . 553 
En Me Er NE 610 | martensi (Lysianassa). ..... 87 
N 797 | massavensis (Maera) . ..... 440 
magellanica (Lysianassa) . .. . . 73 | massayensis (Moera). . . .»... 440 
magellanica (Metopa) . ». - » .». . 185 | massiliensis (Grubia taurica var.) - . 644 
magellanica (Pontogeneia) . . . 360 | mastersii (Maera). ....... 439 
magellanica (Stenia) - - -» » =. 88 | mastersii (Megamoera). ...... 439 
magellanicum (Acontiostoma) . . 15 | maximovicezi (Amathillina) . . . 500 
magellanicus (Anonyx) -» » 2... 88 | maximovitschi (Amathillina) . . . . 500 
magellanicus (Atylopsis) . - - . -» . 360 | maximus (Acanthogammarus) . . 734 
magellaniceus (Atylus) . ». ».... 360 | maximus (Polyacanthus) .. ... . 734 
magellanieus (Eurytenes) . .. . . 73 | media (Allorchestes) . ...... 569 
magellanicus (Metopoides) . . . 185 | media (Hyale). . . ... 2... 569 
mahafalensis (Grandidierella) . . 739 | media (Hyale (Allorchestes)). . . . 569 
major (Hyale nilsoni var)... . - 566 | media (Paramphithoe). . ..... 3ll 
malleolus (Allorchestes) . . . . 582 | mediterranea (Orchestia) . . . . 53l 
malmgreni (Acanthostepheia) . . 254 | mediterranea (Örchestia). .. .. . 542 
malmgreni (Acanthostephia) . . . . 254 ! mediterranea (Talitrus locusta forma) 525 
malmgreni (Amphithonotus) . . . . 254 | medius (Allorchestes) . ...... 569 
malmgreni (Amphithopsis) . . . . - ölö | medius (Pleustes) . ....... all 
malmgrenii (Acanthostepheia) . . . 254 | medusarum (Hyperia) ....... 512 
malmgrenii (Oediceros) 254,254 | megacheir (Autonoe) ....... 596 
malmgreni (Stenopleustes) . . . 3l6 | megacheir (Ischyrocerus) . . . . 659 
mammillifera (Pallasiella) .. . . - 415 | megacheir (Lembos). . . .... 596 
manophtalmus (Gammarus fluviatilis megacheir (Metopa) . .. ..... 197 
EEE "2.2... 409 | megacheir (Parapleustes). .. . . . 817 
mantis (Cheiroeratus) . ». » ... .» 419 | megacheir (Podoceropsis) 616, 659, 659 
manudens (Amphilochus) . . . . 150 | megacheir (Podocerus) . . 658, 659 
manuidens (Amphilochus) . .. . . 150 | megacheir (Stenothoe).. .... . . 197 
margaritaceus (Gammarus) . . . . . 457 | megacheir (Sympleustes) .... . 317 
margaritaceus (Odontogammarus) 457 | megacheles (Cheiriphotis).. . . . 737 
marina (J,ysianassa) ..... 87,721 | megacheles (Melita). ....... 737 
marina (Lysianassa) . ....... 719 | megacheles (Probolium) ..... . 194 
marina (Stenothoe) . .. . . 198, 725 | megachir (Xenoclea). ....... 621 
anarina (Urothoe) . x 2. ......:.180 | Megalonours . . . . :..2 2... 420 
_ marina var. sinhalensis (Stenothoe) .. 725 | megalophthalma (Orchestia) . . . . 549 
marinum (Probolium) ....... 198 | megalophthalma (Talorchestia) . 549 
marinus (Gammarus) 387, 428, 473, 484, 505, | megalophthalmos (Orchestia) . . . . 549 
5l4 | megalophthalmus (Atylus) .. .. . 363 

marinus (Gammarus) . .. . . - 472 | megalophthalmus (Orchestia). . . . 549 
marinus (Montagua). . . ..... 198 | megalophthalmus{Scamballa). . . . 549 
marinus (Suleator) . ». »..... 130 | megaloprotopus (Amphithoe). . . . 633 
marinus (Urothoe) ...... 130,132 | megaloprotopus (Ampithoe) . . . 633 
marinus var. pectinatus (Urotho@) . . 130 | megalops (Apherusa) . .. . . . 306 
marioni (Peltocoxa). ...... 160 | megalops (Aristias) .. ..:... öl 
marionis (Acontiostoma) . . . . 15 | megalops (Cerapus) . . .. 2... 673 
marionis (Amphilochus).. . . 151,723 | megalops (Eriehthonius) . . . . . . 673 
marionis (Amphithoe) .. . .... 515 | megalops (Eriethonius) . .. . . 673 
marionis (Amphithonotus) . . . . . 515 | megalops (Halimedon). ...... 250 
marionis (Pardalisca) .. .. . . 224 | megalops (Halirages) . . . . . . 293 
marionis (Peltocoxa). . .. .».. 160 | megalops (Halirages) ....... 306 
marmorata (Jassa) . .. 2...» 739 | megalops (Ischyrocerüs). . . . - 660 
marmorata (Orchestia) . ... . 536 | megalops (Paramphithoe) . .. . ... 293 


768 

page 
megalops (Westwoodilla) . . . . 250 
Megalorchestes . . . . »... 527, 549 
Megalorchestia . ........ 527, 549 
nn VRR . +. 420 
Megaluropus ne rn 420 
br tn. ER RE RE 430 
Megamoera . ....... 430, 433, 441 
Megamphopus: nr en 621 
megapleon (Monoceulodes) . . . . . 238 
megapleon (Perioculodes) . . . . 238 
megnae (Mierodeutopus) . . . . . 592 
meinerti (Hyalella) . . . ... . 579 
meinertii (Thoelaos). . ...... 286 
meinerti (Laothoe) . . ...... 286 
meinerti (Laothoes) . . . . ... 286 
melanophthalmus (Anonyx). . . . . 46 
melanops (Amphilochus) . . 152, 723 
melanops (Gammaropsis). . . . . » 618 
DER: en ee a 421, 732 
b 0.1 REES Er .. 798 
Melphidippa  : . . ».\. :. 835 
BERN 337 
Meiphidippells 7... 222°. 02L% 3837 
Melphidippidae ..... 334, 728 
WEHTMETBIOR EN en 48 
Mesopleustes . er 315 
messalina (Melita). . ..»...... 742 
IURREHDOSUB.: 2 er le 138 
DENODB TTS TE REN 7... 1072, 724 
Ma EEE 182, 187, 193 
MHOBEBR N 182 
MESTOPIARO: ET 171 
BERRRIRRE 3 6 ER EN 724 
Bemporden. NEN 182 
Metopdides: N. 185 
meyerii (Dybowskia) . ... . 730 
meyeri (Pallasea). . . . 2... 730 
Mishchalan. "0 214 
mierodentopa (Gossea). ». » » +.» 307 
Mierodentonus: 2 an 588 
Microdeuteropus . . 2». 2. 2%. 588 
mierodeuteropus (Atylu) . ... . 364 
mierodeutopa (Gossea). . » . .. .- 307 
IMerodsutopie "u.a 588 
Nywodentopne N: NE FR 600 
WISFOTBBRRE NAHE TER RS EN 651 
mieronyx (Cyphoearis) . . .. .. . 29 
mierophthalma (Grubia). . . . - 738 
micerophthalma (Pontoporeia) . . 127 


mierophthalmus (Allorchestes) . . . 571 
microphthalmus (Gammarus rhodoph- 


thalmus ar) ala 504 
Mieroplax ...... ut 230 
Mieroprotopus . ... »......604 


mierops (Aristias) . - 7. ...2.%..49 
mierops (Oediceros). . .» . . « 245, 246 
mierops (Stenothoe) . . .... 


Alphabetical Index 


page 
mierura (Amphithoe) . . . 2... 489 
MASTUTODUB 52. . 2 en 398 
miersi (Anonyx) +. 2 2.....% 70 
miersi (Elasmopus) . . . .. . . 446 
miersi (Hippomedon) . ...... 75 
mierst (Anonyx) .:. ....:424020.00% 75 
miersii (Dexamine) . . ... .... 517 
miersii (Meers) ; .::.°.°, 2.4. 29% 429 
miersii (Megamoera) . » ..... 429 
miersii (Montagua) . . . 2». .... 200 
miersii (Montaguana) . . .».... 200 
miersii (Paraceradocus) . . . . - 429 
miersii (Probolium) . . . . » ee 
miersii (Stenothoe) . . . .... 200 
miersi (Leucothoe) . . . .... 165 
Ed 7°, 3 WE RE 446 
miersi (Tmetonyx) . ......2 
mihiwaka (Chiltonia) . - . .» . 555 
mihiwaka (Hyalella) . ..... 555 
mine (Oerapusy: > 5 4 5 7 2 671 
minax (Eriehthonius) . .. .... 740 
minax (Mierodeutopus) . . ».. .» 590 
miniatus (Gammarus aheneus subvar.) 487 
minikoi (Nototropis) Br, 
minikoi (Paratylus) . . ». 2... 728 
minimus (Gammarus) . . 2... 513 
minor (Hyale nilsoni var.). . . . . 566 
minus (Gammarus) . . ..... 513 
minuta (Cressa) . +... .... 192 
mente (Dansia) 4... 00 192 
minuta (Iphimedia) . . .. ...».- 213 
minuta (Lysianassa). . . :.... 82 
minuta (Orehomenella) . . . . - 82 
minuta (Panoploea) . .....» 213 
minuta (Stenothoe) . . . .»... 725 
minutieornis (Ampelisea) . ... . 114 
minuticornis (Byblis) . . .....» 114 
minutum (Cyrtophium) . . . . . 698 
minutum (Platophium) . . 2... 698 
minutus (Adonyn) .. 82 
minutus (Busirus) . ...... 342 
minutus (Gammarus) . »..... 466 
minutus (Gammarus pulex) . . . . 410 


minutus (Ichnopus) . . 2.2 ....52 


minutus (Ischyrocerus) . . . » . - 658 
minutus (Microprotopus) 605 
minutus (Niphargus) . . . .. . 410 
minutus (Örchomene) . . ..... 82 
minutus (Örchomenella) . » : ... 82 
minutus (Podocerus) . „2... 655 
mirabile (Lepidepeereum) . . . . . 80 
mirabilis (Platyisehnopus) 123 
mirabilis- (Platyschnopus) . . . . . 123 
mirabilis (Weyprechtia) . . .. . » 381 
mitsukurii (Amphithoe) . .. ... » 635 
mitsukurii (Ampithoe) . .. . . 635 
Moera-........ . MEER 433 


a a 


Pi 
E 
3 
. 
E 
7 
[ 
2 
; 
i 


Alphabetical Index 


page 

moggridgei (Amphithoe). . . » . . 387 
malleri (Halimedon) ....... 250 
monacantha (Dulichia) .. . . . 710 
moniezi (Neoniphargus). . . - - 405 
moniezi (Niphargus) -. » ..... 405 
Monoeulodes . . .. 2... 258, 727 
monoeuloides (Atylus). - -. .. - « 345 
monoeuloides (Cancer (Gammarus)) . 196 
monoculoides (Eusiroides) . . . 345 
monoeculoides (Gammarus) . . » - . 196 
- monoculoides (Montagua) . . . . . 196 
monoeuloides (Probolium) . . . - . 196 
monoculoides (Stenothoe) . . . . 196 


monoculoides (Stenothoe) . 197,198, 200 


Monoetulopsis.. .. Hi. are 257 
monocuspis (Neopleustes) 313 
monoeuspis (Paramphitho£) 313 
monodon (Corophium) ..... 690 
monodon (Ischyrocerus) 662 
monodon (Podocerus) . » » » 2... 662 
monstronn (Helay): „cn naiis venie 675 
monstrosa (Helella) . -. ...... 675 
monstrosa (Neohela) . . .... 675 
monstrosa (Neohela) . . .» .... 676 
Se 193 
montagua (Iscoea) -. -». .»..:.... 630 
ee ee 193 
montagui (Isaea) . » »... - 630 
montagui (Orchestia) . . ». .» - 533 
montagui (Örchestia) . » »... - 542 
montana (Orchestia) . . ... . 542; 
montanus (Gammarus). » » ... .» 410 
montanus (Niphargus) . . . - - 404, 731 
montanus (Niphargus) . .... 410 
monticulosa (Eurymera) 357 
morawitzii (Atylu) - » .. . „2... 397 
morawitzii (Brandtia) . - . - .- . 397 
morawitzii (Gammarus) . ». ».- .» 397 
morrhuae (Ichthyomyzocus) 208 
mortoni (Microdeuteropus) . . . - - 587 
mortoni (Mierodeutopus) . » -.» » 587 
mortoni (Niphargus) . .... . 731 
muecronata (Harpinia). -. -. - - - 141 
mucronatum (Corophium) . . . . 689 
mueronatus (Amathilla) . ....% 506 
mucronatus (Carinogammarus) 

506, 734 
mucronatus (Crangonyx) . . . . 388,731 
muceronatus (Eucrangonyx) . 388,731 
mucronatus (Gammaracanthus) . . . 506 
mucronatus (Gammarus) . - . . - « 506 
mucronatus (Siphonoecetes) . . - . 683 
TE ee ar? , . 
mülleri (Halimedon) . . . .»... 250 
multidentata (Megamoera) . . . . . 436 
multifaseiatus (Gammarus)!. .. . . 742 
multispinis (Iphimedia) . .. .. . 212 


page 

muricatus (Oniseus) -. -. »-. .... 376 
murinus (Echinogammarus) . . . 486 
murinus (Gammarus) . » 2»... . 486 
murmanica (Ambasia). . ... . 719 
murrayi (Sophrosyne)‘. .. .. . 21 
murrayi (Tryphosa). . . .... 720 
musculosa (Orchomenopsis) . . . 84 
museulosus (Anonyx) . » ».... 84 
musculosus (Orchomene). . . . . . 84 
mutatus (Gammarus) . » ».... 476 
mutilus (Cancer (Gammarellus)) 493 
mutilus (Echinogammarus) 493 
mutilus (Gammarus) . ...... 493 
a ER 618 
Baus. CARABIRI I. 32 ee 
nana (Gammaropsis) . - -» 2... 616 
I: Wane (HlarDinid) 2.0 a, 141 
nana (Örchomenella) .. ..... 8l 
BABE CENORISN: 4a ei 738 
nass (Iryphosa). ih sa 5% 70, 81 
MARDORVE 4 re SE sr 34 
nanoides (Anonyx) .» 2...... 71 
nanoides (Ischyrocerus) . . . . . 657 
nanoides (Podocerus) . » ». . . . 657 
‚nanoides (Tryphosa) . ..... 71 


nanoides (Tryphosella) ...... nn 


nanseni (Pseudalibrotus) Pe 9. 
EB TARNORNEN 71, 81,87 
nanus (Orchomenella). . ... . sl 
nanus (Tryphosa).-» »... » 8l 
Hardonis (Ananyx)..... 5.47% 86 
nasuta (Boeckia) . -. . ». +. 39 
nasuta (Lysianassa). -. =... 40 
nasuta (Lysianax). - - » ». we 
nasuta (Metopa) .». » »- 0x. 182, 183 
nasuta (Metopella) -. . ..... 182 
nasutigenes (Metopa) . » » 2.2. 183 
nasutigenes (Metopella) ....;:. .: 183 
nasutigenes (Proboloides). . . . . - 183 
natator (Gammarus) . » .... 463 
neapolitanus (Amphilochus) . 150, 723 
neglecta (Harpinia) . . . . 142,143,143 
neglecta (Metopa) -. » 2»... .. 184 
neglecta (Metopella) .... .. 184 
neglectus (Aristias). .. .- - . 50 
neglectus (Gammarus) . .. . 2. 474 
nematocerus .(Gammarus leptocerus 
ne EEE RENTE FR, 
DIERBGRIBR 2. =. 7. 1. 2 inet 693 
N RE U EB VER 556 
RIED: ne ae 556 
OT er 675 
Neoniphargus ......% 404, 73] 
Neopleustes . . ». » 0. . 811,728 
neozelanica (Allorchestes) . . . » . 581 
neozelanica (Nicea) . .». ».....- 567 
neozelanica (Pherusa) » . » .».. «= 294 


Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 49 


770 

page 
neozelanieus (Oedicerus). . .» . . » 270 
neozelanicus (Platyischnopus) . 123 
nesaeoides (Nemertes). - » » ». - 693 
neveu-lemairei (Hyalella) . . . . 786 
newnesi (Oediceros) . » -» .. - 726 
nieasense (Trischizostoma) . . 13,717 
nicaeensis (Guerina). . - -»....- 13 
nicaeensis (Guerinella) . ."... . 717 
nieaeensis (Guerinia) . » 2...» .- 13 
nicaeensis (Trischizostoma) . ... 13 
Nasa REN ET 557,559 
TIeraaypen. =. KERSEURE  AUNE 8 225 
nidrosiensis (Orchestia) -. -. » . . - 566 
niger (Allorchestes) . - . . - - en  } | 
niger (Pleuracanthus) .. . .».. .» 730 
nigra XHyale) 2 nl 571 
nigra IEALBROB) 42.0 730 
nilsoni (Hyale). .. ..... 566, 568 
nilsoni INIGBR) 18 +... 0. 0, 6 585 
nilsoni var. major (Hyale) . ... . 566 
nilsoni var. minor (Hyale). ... . 566 
nilssoni (Halirages) . -. . . . . . 290 
nilssoni (Hyale) . .... .» 566, 736 
nilssonii (Allorchestes) . . » .. . 566 
nilssonii (Amphithoe) . ...... 566 
nilssonü (Hyale) . »....:.... 568 
nilssoni var. kuriensis (Hyale) . . 736 
Niphargoides :: :..: .-.. ..%.4°5% 450 
Mäiphargus ». ai. ist 405, 731 
Nivbamus s= 4 wu Saas} 472 
nitens (Anonyx) - . .- - A 88 
nüitens (Lysianassa) . -. ». .»... 88 
Be (Melita) iz 424 
zaäitida (Orchestia). -. . . ». ... 539 
mitida (Podoceropsis) . - » . » . 620 
nitidus (Podocerus) . . : .» » 2...» 620 
nobile (Corophium) . . . ... . 687 
RabNis. LAHnONyz) 7.2.0.0 iu 
nodifera (Acanthozone) -. . . .. . 316 
nodifera (Amphithopsis) . . . . - . 816 
nodifer (Stenopleustes) . . . . . 316 
nodimana (Orchomenopsis) . . . 721 
nodimanus (OÖrchomenopsis) . . . . 721 
nodosa (Acanthosoma) . .» :»... 216 
nodosa (Amphitoe) . 2. ..... 216 
nodosa (Iphimedia) . . . .... 216 
Hospia nn 5 NE a, R 618 
nolens (Anonyx) » ».» 22...» 742 
nolens (Gammarus) . . . RES, 
nordenskiöldii EREEERN RR | 
nordenskiöldii (Prinassus) . . . . . 522 
nordlandica (Andania) . ..... 93 


nordlandica (Andaniopsis) . -. . 9 
nordlandica (Dulichia) . ... . 
nordlandieus (Atylus) . .. 2... 
nordlandieus (Nototropis). . . - 
nordlandieus (Paratylus). .. .. . 


Alphabetical Index 


page 
nordlandieus (Stegocephaloides) . . 93 
nordmannii (Acanthonotus) . . . . 111 
nordmanni (Ampelisca). . .. . 11l 
nordmannii (Protomedeia) . . . . . 742 
NOriania 0 En 41 
normani (Anonyx) . ». 2.2... 26 
normani (Dulichia) . . . .... 711 
normani (Euonyx) . :...... 19 
normani (Iphimedia) . . .... 217 
normani (Metopa) ....... 190 
Nöormanion "aM 41,718 
normani (Önesimus) . » » 2.2... 26 
normani (Onisimus) . ......% 
normanni (Gammarella) . . .... 449 
normanni (Liljeborgia) . ». » .. » 418 
norvegica (Amphitho@) . ..... 307 
norvegica (Bathyporeia) . . . .. . 120 
norvegica (Calliope) - ».».... 307 
norvegica (Leucothoe) ...... 177 
norvegica (Metopa) . . ..... 177 
norvegica (Montagua) . . . . . 177,178 
norvegica (Paramphithoe) . .. . . 307 
norvegica (Podoprionella). ... 17 
norvegica (Urothoe). . .. . . 131,132 
norvegieus (Anonyx) .». » 2»... 74 
norvegicus (Calliopius). - » ».». . 307 
norvegieus (Monoculodes) . .» . - . 264 
norvegicus (Monoculodes). . . . 265 
norvegieus (Oedicerus). . . . . 241,265 
norvegieus (Pontocrates) . . . . 240,241 
INototropis 272: 329, 728 
Notzotopis - 2 SE RER 329 
novaehollandiae (Leueotho£) . 169 
novaehollandiae (Paraleucothoe) . 169 
novaehollandiae (Talorchestia) 5583 
novaezealandiae (Allorchestes) . . . 581 
novaezealandiae (Hyale) . . . .. 567 


novaezealandiae (Leptamphopus) 294 
novaezealandiae (Nicea) . ... . - 567 
novaezealandiae (Oedicerus) . . 270,297 


novaezealandiae (Orchestia) . . . 542 
novaezealandiae (Pherusa) . . . ... 294 
novizealandiae (Allorchestes) . 581 
novi-zealandiae (Oedicerus) . 270 
novizealandiae (Orchestia (Talitrus)) . 547 
novizealandiae (Örchestoidea) . . . 547 
novizealandiae (Talitrus). . . » . . 547 
nubilatus (Monoeulodes) . . . » . - 246 
nubilatus (Oediceros) 261, 262, 264, 264, 265, 

265, 266, 266 
nudicornis (Hyale) .. ..... 573: 
nudicornis (Nicea). . » -» - »... 573. 
nugax (Anonyx) ..... 54,719, 721 
nugax (Anonyx) . 54, 55, 55, 66, 75 
nugax (Cancer)... . . . er EEE RE 
nugax (Gammarus) . » ..... 54, 56 
nugax (Ichnopus) . ..». .. . » 48, 52, 57 


u  # a HB a 


se Sl ae Te oe U re ee 


EEE EEE ELEND 


Alphabetical Index 


page 
nugax (Lysianassa) » » 2... 56 
nugax (Talitrus) . ..-..... 54 
nugax (Tryphosa) .. ...... 720 
obesa (Charcotia) - - . -» ...» . 718 
obesa (Iphimedia) . . . - - 213, 213, 217 
obesa (Iphimedia). . . .». .» .» - 214 
obesum (Aeidostoma) . . -» » . - 14 
obesum (Aeidostoma) . .» ..... 14 
obesus (Anonyx) . » 2.2... 14 
obesus (Gammarus). . ..... 464 
ob8aBu8 (Katlue)...2:,. 00 721 
obtusa (Orchomenopsis) . . . - - 85 
obtusa (Polyeheria) .. . ».... 520 
obtusata (Amphithoe) . . . .».. - 426 
obtusata (Melita) . - ». »..:.-. 426 
obtusata (Melita) . .. . . 426, 427, 428 
obtusatus (Cancer (Gammarus)) . . - 426 
obtusatus (Gammarus). - » .»... 426 
obtusifrons (AnonyxX) . » ... - » 48 
obtusifrons (Bathymedon). . . . 256 
obtusifrons (Halimedon) . . . . . .» 256 
obtusifrons (Harpinia) ... - - 143 
obtusifrons (Menigrates). -. - - » 48 
obtusunguis (Gammarus) . . . . 426,449 
obtusus (Anonyx). .... +... 85 
obtusus (Oediceros) . . - » »...» 248 
obtusus (Oedicerus) .. . -»... - 248 
obtusus (Phoxocephalus) . . . . 136 
allaue (Ehaxas) - : zu. 2 sh 136 
oceidentalis (Amphithonötus). . . . 311 
occidentalis (Pleustes) . . . . . 8ll 
ochotensis (Allorchestes) . . . . . . 561 
ochotensis (Echinogammarus) . . 484 
ochotensis (Gammarus) . . .».. . 484 
ochotensis (Hyale) . . ..... 561 
ochotensis (Orchestia) . . . 543 
oeis (Bruzeliella) . ........ 739 
Baus: GJABBEN: ae 655, 739 
oeius (Podocerus). . » .». . - 653, 655 
oculata (Rhachotropis) . . . . - 350 
Öeulats (Tritropis) +... #0 350 
oculatus (Amphilochus) . . . . . 152 
oculatus (Paraphoxus) . ... . 137 
oculatus (Phoxocephalus) . . . . . 137 
oeulatus (Phoxus). .. ... 2... 137 
ar ee 210 
Odontogammarus . . :: 2... 456 
odontonyx (Amphilochoides) . . . . 152 
odontonyx (Amphilochoides) 153 
odontonyx (Amphilochus) . . . . . 153 
odontonyx (Podocerus) . . . . . . 658 
odontoplax (Ampelisca) . .. . - 103 
a ET 5 FT er 235 
a Re 235 
Ne VE Pe RER 235 
BERISEINSE 2 nee 235 
N er 267 


771 
paga 
WOHMGEFODBIS +. 0. 1 ae 252 
BBBISOEOH - 2. ee dee . 243, 726 
Oedicerotidae ........., 235 
a EEE 243 
olivaceus (Gammarus viridis var.). . 484 
GUYE (dammarus) .... 2. 5... 22%, 472 
olriki (Amphithopsis) .. ..... 319 
olrikii (Amphithopsis) . . . ... . 319 
| olrikii (Sympleustes) . . .... 319 
Ommatogammarus: . „7... 454 
onesiensis (Niphargus puteanus var.) .. 406 
ONESIMOIGBR 4... 42: en, a :} 
RE Sr re 25,33 
ongureni (Dybowskia armata var.) 735 
I EL 1 
Onlsimuasr. 22 Wera N TRATEN 25 
N EN re 33 
a 20 
ER a NE 20 
EHBARTOR: 2 2 02 Se ee ae 727 
RE Be ee 530, 799 
orchestes (Gammarus) . . . ... . 478 
orchestes (Poekilogammarus) . . 478 
N N ER WE RE 530, 735 
BRRREBI TARGA r 523 
BROHESEIOD Eu. 523 
orchestiformis (Gammarella) . . . . 449 
Orchastildae 2... 0. 2 523 
orchestiipes (Ceradocus) 432 
orchestiipes (Maera) . . ...... 432 
orchestipes (Megamoera). . . . . . 432: 
orchestipes (Melita).. ..... . . 432- 
@#chestoldes. au. Nr, 527 
RE RE 44° 
34, 78,81 
DESBOMeNe, 2. 44 
Orehomenalla 7.2..2:2.27 3 67,68 
Orchomenella . ... .2..7.272% 81, 720 
orchomenipes (Eusiroides) . . 729 
Orchomenopsis . - . ..... 83, 721 
oreinus (Gammarus). -. -...... 408 
oreinus (Niphargus). .. .... 408 
orguion (Paradryope) . ..... 602 
orientale (Cratophium). . . ... . 657 
orientale (Cyrtophium) . . . . . 698 
orientale (Platophium) 698, 702,703, 705,706 
.orientalis (Allorchestes) . . . . » . 573 
orientalis (Amphithoe). . . . .. . 641 
orientalis (Ampithoe) . . . . . . 641 
orientalis (Gammarus) . . - .. . » 657 
orientalis (Hyale) . . . ..... 573 
orientalis (Jassa) -. ». ». . 2.2.» 657 
orientalis (Podocerus) . . ».. . » 657 
orientalis (Siphonoecetes) . . . . 740 
orientalis (Synopia) . -. .». .»».. 273 
ornata (Acanthostepheia) . . . . . 270 
ornata (Cyproidea) . . ..... 158 


772 
page 
ornata (Öyproidia) .... 2... 158 
orrats WRABBO): RE ar 657 
ornata (Oediceroides) . » . .. » - 270 
ornata (Orchestia).. . . . - re | 
ornatus (Gammarus). ». 2»... .. 476 
ornatus (Halimedon) . ...... 270 
ornatus (Ichthyomyzocus) . . . .- - 742 
ornatus (Oediceroides) . . . . . 270 
ornatus (Podocerus). . » - 2»... - 657 
ornatus (Talitrus). .» 2... 4 527 
Orthopslame : in 3 Nr 604 
osborni (Polycharia). . . ... - . 520 
osborni (Polycheria) . ...... 520 
ossiani (Balliope).., u. 0. ).% 817 
ossiani (Calliopius) . » » 2... 317 
ostroumowi (Eurystheus) . . . . 614 
ostroumowi (Protomedeia) . . . . » 614 
otakensis (Cyproidea). . . .. » 723 
otakensis (Cyproidia) . » .»....- 723 
othonides (Maera). . ...... 132 
othonis (Gammarus). . .». » ....- 438 
othonis (Maera). . . » ».2.2.%. 438 
othonis (Megamoera) . . .»..... 439 
TREE AT ET ee 210 
ovalipes (Apherusa). . . .... 1727 
GEE TEOLINBN no. er tan 707 
ovalis (Socarnes) . » . x...» 56 
aaa (Metopa). - 1. 19% 222855 183 
ovata (Metopella) . . .:» 2... 183 
ovatus (Metopoides). . » » »..» . 183 
oweniüi (Acanthonotus). » » .» - . - 323 
oxyura (Melita):. 21... 2% R.2392% 429 
pachycera (Leucothoe) . . . . -» 164 
"pachytus (Atylus). .........:00% 404 
pachytus (Gammarus) . . ..... 404 
pachytus (Micruropus) . . . .» » 404 
pachytus var. dilatatus (Gammarus). 404 
pacifica (Dexamine). . . »..»... 518 
pacifica (Iphimedia). . . .» ... 215 
 pacifica (Paradexamine). . .. . 518 
pacifiea (Paramphithoe) . . .. . . 728 
pacificus (Neopleustes) . . .. . 728 
packardii (Orangonyx). - » .... 389 
packardii (Eucrangonyx) 389 
packardi (Monoculodes) . . . . . 266 
Pausndras N SE 202 
REDABeR 23.2 av. a 374, 750 
Bi 1a. 1 TERRA ENTER 374 
Palsstells BRETT REN 374 
pallida (Liljeborgia). . . . .. . 230 
pallida (Liljeborgia) . »... 2... 23l 
pallida (Lilljeborgia) . ». 2... 281 
pallida (Melita).. „NEE 422 
pallida (Nieippe) . . .. . 232, 232, 234 
pallidus (Anonyx). ....... 86 
pallidus (Concholestes) . . . 2... 742 
pallidus (Gammarus) . .... 230, 232 


Alphabetical Index 


page 
pallidus (Monoculodes) . . . . . 261 
pallidus (Siphonoecetes). . . . . 683 
palmata (Gammaropsis) . » x.» » 616 


palmata (Melita) . 422, 424, 427, 429, 505 


palmata (Melita) . . . : 2... 425 
palmata (Metopa) . ... . . . 174,724 
palmata (Metopina) . . ».» 2... 724 
palmata (Podoceropsis) - » » » .» - 616 
palmata (Sthenometopa) . » . . » » 724 
palmatus (Astaeus) . . » 2.2... 425 
palmatus (Cancer). . ». . 2.2... 425 
palmatus (Burystheus) . . .. -» 616 
palmatus (Gammarus) . . . 2... 425 
palmatus (Podoceropsis) . . .» . » - 616 
palmeta (Melita) ... » 2... 425 
palustris (Orchestia). . . -».... 540 
Pinttara , RE TER 448 
PURBBriteB 2. RER 448 
panopla (Acanthozone) . . . . 310,311 
panopla (Amphithoe) . . .».... 310 
panopla (Amphitoe). . ..» 2...» 310 
Poboplass EEE . 211 
panopla (Paramphithoe) . . . . 310,311 
panopla (Pleustes) ...... 310, 311 
Panopldea u. re. ee ER 
Pohoploea . EN ET 293 
panoploides (Amphithoe) . . .. - all 
panoplus (Pleustes) . . . . . ..» 310 
panoplus (Pleustes) . . .». » 2... 311 
papyracea (Syrrhoe) ...... 283 
Paraoalliode: 2. ES BRITEN 2397 
Paracalisoma.:. Ay RN 719 
Paraceradoeus Va NER RER 429 
Päarseorophium 7; TREFF IREER 663 
Paracrangonyz ..:. DREIER 369 
Paracyphocaris- Wr ES 717 
Paraeyproidea  .... an u 160 
Paradexamine .. PT 518 
ZEESRHE: REN 602 
Persäulichie , YORE 713 
Poragrubis m. N Ba Nr 739 
Porajassa u ERENN 649 
Paraleptamphopus . . . . .» 3 294 
Paralencothoe „3 EEE 
parallelocheir (Metopa) . a 186 
parallelocheir (Metopoides) . 186 
Parambasia . EI TR 
Parsniara TRENNEN 368 
Parametope..: NT ER 725 
Paramieruropus. . . ... ER... 
Pasampvera u... wm es 368 
PRRRDORE EEE TAI 421, 423 
Paramphithoe . 295, 296, 304, 309, 311, 329 
Paramphithoe. ...... : . 324 
Paramphithoidae ..... ° 309 
Paramphithoidae . ..... 320 
Paranaenia. .. . . EIER 


J 
3 


A ee il mh 0 4 ne Dan Li? al a mi u en ae 
WITT FRE aa ö Ber 


te A LE aa rl m Kl rd u u ae ann 
= RT 


u Bu a 


‚peetinatus (Anonyx). - ..... 45, 46 


Alphabetical Index 773 

page page 

Parandania . ..2 2, ss 95 | peetinatus (Leptocheirus) . . . . 629 
Parapallasea ... . - .» . . 497,753 | pectinatus (Metaphoxus) . . . . 139 
Parapheruss .. . u... 1%. 383 | peetinatus (Örchomene) . ..»... 45 
Paraphoxus. ........ 137,723 | pectinatus (Phoxocephalus). . . . . 139 
SRmmplouslen » ats an as 319 | peetinatus (Ptilocheirus) . . . . . . 629 
PS EN RE 320 | pectinatus (Stegocephaloides). . . . 9 
ET Re 40 | peetinatus (Stegocephalus) ... .. 9 
parasitica (Acanthosoma) . . : . . 821 | pectinatus (Urotho& marinus var.). . 130 
parasitica (Amphithoe) . .... . 321 | pectinierus (Moera) . ....... 445 
parasitica (Epimeria) . . ... . 821 | peeulans (Amphitoe) . ...... 674 
parasiticum (Cyrtophium) . . . . . 699 | peculans (Eriethonius) .... . . 674 
parasiticum (Platophium) 699, 702,704 | pelagica (Ampelisca) . . . . 111,722 
parasiticus(Acanthogammarus)511,735 | pelagiea (Ampelisca) . . . .. al 
parasiticus (Acanthonotus) . . . . - 321 | pelagica (Amphithoe) : ...... 645 
parasiticus (Ceradoeus) . ..... 511 | pelagica (Amphitoe). ....... 645 
parasiticus (Gammarus) : .... . 511 | pelagica (Bathyporeia) . ... . 120 
' parasiticus (Leipsuropus) . . . . 699 | pelagica (Jassa). . »..... 649, 656 
parasiticus (Polyacanthus) . . . . . 735 | pelagica (Parajassa). . ..... 649 
Zurauyphosites. . . : . . 2. 42 | pelagica (Sunamphithoe). . ... . 739 
829 | pelagica (Sunamphitoe) . . . 645,739 
EEE a EL TRER FIRE -.:281 | pelagiea (Thessites). . - . .... 120 
AR 224 | pelagieus (Cerapus) . » .» 2... 742 
Nr A EP 227 | pelagieus (Podocerus) . . » .». .. . 654 
zaräsliscidae . 2... 03: 220 | pelagicus (Pseudophthalmus) . . 111, 721 
Bardaliscinae:... 0; sack 220 | pellueida (Melita) . . - ..... 424 
Paraslnonlden’:, Cr 224 | peloponnesiacus (Gammarus) . . . . 513 
Bar6läsmopus,. 2 417,732 | peloponnesius (Gammarus) . . . 513 
RP, sen a 900 147 | peltata (Stenothoe) . . ..... 194 
BrarBunlor 22, ae or 0 A 157 
Parosedioceron . ı. „2.2, DIET EBERBOER 2 2: 2 EN 159 
en) Ve EEE: 43 | penieillata (Allorchestes) ... . .. . 585 
en RE BE ee GR SER RER 21 | penieillata (Amphithoe) . ..... 639 
Bevarcheatia. 2:2, 947 ,7.2..084.% 557 | penicillatus (Allorchestes) . . . . 585 
parvexii (Echinogammarus) . . . 493 | Pephredo . . .. : 22... 715 
parvexii (Gammarus) . . . 2... 493 | pepinii (Acontiostoma) . .» .... 16 
parvimana (Melita) . . ..... 732 | pepinii (Stomacontion) . . . . . 16 
parvimanus (Halimedon). . . . . . 250 | peregrina (Amphithoe). . . ... 637 
parvimanus (Oediceros) . .. .. . N. Peeblonoims. : 2. eye 201 
parvispinosa (Orchestia) . . . . 541 | ‘pereiri (Allorchestes) . . . . . 565, 570 
parvus (Pleustes) . - -....... 742 | perieri (Allorchestes) -. . -» . .. . 570 
patagonicus (Allorchestes) . . . 585 | perieri (Hyale) . .. ...... 570 
paulensis (Allorchestes). . . . - 685 }: peren (Nivea)... 1 en 570 
paurodactylus (Cardenio) . . . . 126 | perieri (Örchestia). . -» » 2... . 570 
paurodactylus (Cardenis). . -» » . . 126 | perieri var. breyicornis (Nicea) . . . 570 
pausilipae (Amphithoe) .. ... . 641 | perieri var. pontica (Nicea) . . . . 570 
pausilipae (Ampithoe). .. . .. . 641 | Perioculodes . . ..»..... 237, 726 
pausilipii (Amphitoe) . ...... BL I perla (Alylas) =... 2.2000 403 
pausilippii (Amphithoe) . .... . 641 | perla (Gammarus). .. .. 2... 403 
pausylipi (Amphithoe). . .. .. . 641 | perla (Mieruropus) . ». ..... 403 
pauxillus (Gammarus). . . .. . 469 | pernix (Allorchestes) . . .... - 736 
peetenierus (Moera) . . 2. .... 443 | pernix (Hyalella) .. .. . a 
peetinata (Andania). ....... BB 4 Parrierella . „a... 2.002 % 40 
pectinata (Andaniella). . .... 93 | perrieri (Stenothoides) . . . - - 1725 
pectinata (Harpinia). . .. . . . 142 | persetosus (Elasmopus) . .... - 441 
pectinata (Orchomene) . . . . . 45 | peruviana (Allorchestes) . .. .. - 566 
peetinata (Protomedeia) . . . .. . . 629 | peruviana (Amphithoe) . ..-.. 446 
peruvianus (Elasmopus).. . . . » 446 


774 


page 
peruvianus (Gammarus) .. .... 446 
peruviensis (Megamoera).. . . 446 
petalocera (Glauconome) . . . .. . 681 
petalocera (Lysianella) . . . . . 3l 
petalocera (Unciola) . ..... 681 
petalocerus (Anonyx) . » .».... 32 
petersii (Echinogammarus) 491 
petersii (Gammarus) . . . . . 2... 491 
polrial (Moers) =. 00 a 441 
Dhasdra ur ne 727 
phasma (Neohela). . . ..... 676 
PHOFRER 42.0 son en ae 449 
philacantha (Autonoe). . ..... 598 
philacantha (Lembos) . .»: . . .» . 598 
philacanthus (Lembos) . . ... 598 
BPRIPDNA 0. ae De 89 
SRUSGIABB. .. . 2... Grant 200 
FRLSDUUGSB. 2... 200 
a TE A 200 
Photidap.. an... 603, 737 
en ET 605, 738 
PROXKGaR, 2... uwaln.E Bl 133 
a ee T WR 133 
FROKkIuR er at en 133 
TE, Re 133 
Phozxocephalidae .n:....2% 133 
Thoxocephalus :: 3. 2.2.2:2% 134 
Phoxocenhales . .. .„. su.:3..; 145, 147 
a OT 134, 140 
Phreatogammarus. . . ..».. 453 
phyllonyx (Aceros) . ....... 248 
phyllonyx (Arrhis) . ...... 248 
phyllonyx (Halimedon) ...... 248 
phyllonyx (Leueothoe). . . . . ._- 248 
phyllonyx (Montagua) . ...... 248 
pickeringii (Orchestia) . . -. - . 588 
pickeringi (Orchestia) ... ... . 538 
picta (Amphithoe) ......... 639 
piece Aaunela) vn usa 235 
pieta (Lilljebörgia) . ..:.. .. 235 
pietus (Calliopius). . ...... 297 
pietus (Gammarus) 478, 478, 478, 479 
pietus (Parapleustes) . .. .... 297 
pietus (Poekilogammarus) . . . . 478 
piedmontensis (Allorchestes) . . . 573 
piedmontensis (Hyale) . .. . . 573 
piedmontensis (Hyale (Allorchestes)) 573 
pilicornis (Lysianassa) . .... 40 
pilosa (Bathyporea) ... .. ... 120 
pilosa (Bathyporeia) 120, 120, 121, 121,122 
pilosa (Bathyporeia) . ...... 121 
pilosus (Gammarus (Maera)) . . . . 423 
pilosus (Leptocheirus) . . . 628, 628, 629 
pilosus (Leptocheirus) . . ... . 630 
pinguides (Orchomenella) . . . . 721 
pinguis (Amathia) . .........»% 382 
pinguis (Amathilla) . ... ....% 382 


Alphabetical Index 


page 
pinguis (Auonya) . .:. ern 82 
pinguis (Harpinie) :. .... „8 a 146 
pinguis (Leptocheirus) 627, 738 
pinguis (Orchomenella) . .. . . 82 
pinguis (Pontharpinia) . .. . . 146 
pinguis (Protomedeia) . . . . . . . 627 
pinguis (Ptilocheirus) . . . . . 627, 738 
Dinpals (Eryphosa) =... 90.05 82 
Dinguie I1]rothob) .. 2... 0 2 146 
pinguis (Weyprechtia). . ... . 382 
pingvis (Amathilla) . .. . ..... 382 
pingvis (Gammarus). ... . SE. | 
pingvis (Örchomene). . 2». 2... 82 
pingvis (Örchomenella) . . .... 82 
plaeidus (Gammarus) . . .... 470 
planifrons (Laphystiopsis) . . . 210 
planipes (Glaueonome). . ..... 681 
planipes (Uneciola). . ...... 679 
Blaksmon: „5.270. names 58 
plateaui elongatus (Niphargus) . . . 731 
plateaui (Niphargus) . . : .. . 731 
plateaui robustus (Niphargus) 731 
platensis (Orchestia) . . . . .» .- 540 
platichelis (Talitrus) . . . . .... 525 
Plsiophinme 2 700 
platyceras (Onesimus) . . » .».. 34 
platyceras (Pseudalibrotus) . . . 54 
platycereus (Gammarus wahlii var.) . 402 
platycheir (Gammarus) . . . . . 471 
platycheles (Talitrus) .. - .. - - 525 
Platyischnopus .: ..,0...5% 122, 722 
platynotus (Sancho) . . . ... . 288 
Platyachnopns : 2... , 9% 122 
plauta (Lysianassa) . ».. -»... 26 
plautus (Anonyx) . .:. . 0% 26, 26, 87 
plautus (Onesimus) . . »..... 26 
plautus (Onisimus) . . . ...». 26 
TUOONEKRR 2. a 642, 738 
Plesiogammarus 2.3 446 
Pionracaniäus : .. 3:0 „un 730, 733 
Ploustee u. 2 en 309 
Pleustidas: vr ne 8 309 
Pleustinae ..... EA 309 
Piazaura .. 2. 4:0. 0 OO 
plumicornis (Allorchestes) 583 
plumieornis (Gammarus) . . .» . . . 742 
plumicornis (Nicea) . ». ». .. +. - 583 
plumosa (Autonoe) . . . ».. . 597 
plumosa (Haplocheira). . ». . . . » 609. 
plumosa (Harpina) ........ 144 
plumosa (Harpinia) . -. ».... 143 
plumosa (Harpinia) . . .- ». - 144 
plumosa (Lysianassa) . ». .... 38 


plumosus (Phoxus) . . . . . . 148,144 


plumulosus (Allorchestes) . . - 585 
poeillimanus (Elasmopus).. . . . 443 
poeillimanus (Maera) . . ..».. 443 


E- 
3 
3 
| 
; 
ia 


page 
poeillimanus (Moera) . »..... 443 
modager (Melite)" 4-8. 742 
Podoceridse >. ... 0... 694 
podoceroides (Amphithoe) . . . . - 639 
podoceroides (Lembos) . . . . . 737 
podoceroides (Pandorites) . . . . 448 
podoceroides (Sunamphithoe). . . . 639 
ENCEFODRIR: 5 nee na 618 
EOROBOTOBNN Se een 621 
N 2 ee Ce 802 
a a 428 
BSIDCHFNE: ee 700, 741 
BORODHMan >. = se 18 
Podoprionella .2.°.22.2 22%:..; 17 
ee re 742 
podura (Amphithoe) . .»...... 513 
Dogors (Pheruss) . . 22. ..2.% . 513 
podurus (Cancer (Gammarellus)) 513 
podurus (Gammarus) . . ... . 513 
poeeilurus (Gammarus) . » ... . 472 
2o6ekllogammarußs.." 2. 2,2... i. 477 
Bonus (ABOByE) ... 512 0 86 
pollexiana (Metopa). . - .»..... 177 
pollexiana (Montagua) . ..... 177 
pollexiana (Stenothoe) ..... . 177 
‘ pollexianum (Probolium) . .... 177 
pollexianus (Montagua) . » .... 177 
RE 5 11 27) Bee a 607 
pollieifera (Orchestia) . -. . .. . . 550 
pollieifera (Talorchestia) . . . . 550 
poloniea (Goplana) . ....... 369 
polonica (Synurella). . .. . 369 
polyacantha (Acanthozone) . . . . . 325 
polyacantha (Paramphithoe) 325: 
ER Ur Pe a 734 
polyarthrus (Echinogammarus) . 495 
polyarthrus (Gammarus longicornis 
BR eg ns 493 
a ee a 519 
N A EN 519 
ee 519, 735 
lu) ter Ge PER 3%. 
polyprion (Probolium) . . . . . 194,195 
polyprion (Stenothoe) . . .»... . .. 194 
pompeü (Eusiroides) -. .»...... 845 
pomposus (Onesimus) . » 2»... . 34 
Pontharpilar... 2 2, 5 145 
pontica (Amphithoe vaillantii var.) . 639 
pontiea (Amphitoe) . .... .. . 568 


pontica (Cerapus macrodactylus var.) 673 
pontiea (Chelura) . . -...... 693 
pontica (Dexamine spiniventris var.) 515 


pontica (Hyale) . 561,568, 569, 574, 574, 

581, 584 
2onWoR Aiyaler 2... 2 568 
pontica (Nicea). . .. . BE | 


pontica (Nicea perieri var.) . . . . 


Alphabetical Index 


775 

page 
ponties: (Pherusa) .: 4... 1.2.24, 4 306 
pontieus (Niphargus) . . . .. . 410 
ne De 127 
POBLOCFBIBB.: 0... u 239 
Pontoerätent . 2 2 2 2 waren 241 
POntogonels; - east ra 359 
Pontogeneia . ...... 308, 347, 394 
Pontogeneiidae ....... 356 
N er 359 
PORtODOrBlar 2 Senat 127 
Ponfopereiidse: .. . .u..0u.5% 118 
HORBDBOHBG a Te 127 
porreceta (Dulichia) . . . .... 712 
porrecta (Dulichie) . . ..... . 712 
porreetus (Dyopedos) . . .».... 712 
poseidonis (Urothoe) . . . ... 122 
potamogeti (Pephredo) . . . . . 715 
poucheti (Urothoe) . .... . 131, 722 
praedator (Paracyphocaris) . . . 717 


pravidactyla (Talorchestia) 546 
prevosti (Allorchestes) . . ... . 565 
Deavosli (Biyvalo). 22.04.14 4025 736 
prevostii (Amphithoe). . . ... .- 565 


prevostii (Hyale) . 564, 564, 565, 566, 567, 
567, 570, 570, 571, 572, 572, 572, 572, 
572, 572, 573, 578, 573, 578, 573, 573, 
574, 581, 581, 583, 584, 584, 584, 585, 


585, 585, 585, 585 
prevostii (Hyale) ...... 565, 736 
prevöstii (Niees) . v.. . .:.. 565, 570 
N Re 521 
ET PL 126 
Prischline ...u.2.20.02%% 126 
a 192 
Proboloides. 2. 2.4, u 187, 725 
Proböleides 55 °2.420,.3,773. 03 182 
procera (Leucothoe) . ...... 165 
producta (Lysianassa) . - » » » .» 66 


products. (Photis) : . . :. 
produetus (Centromedon) . . . . 66 


produetus (Dereothoe) . . ... . 609 
propinqua (Ampelisca) ...... 102 
propingua (Harpinia) . . .... 143 
propingua (Metopa). . ..... 174 
propinguus (Eusirus) . . .. . .» 340 
propinguus (Gammarus) 733 
propinquus (Hippomedon) . .. . . 59 
propinguus (Micerodeutopus). . . 592 
propinquus (Oediceros) . . » . . » 246 
propinguus (Paroediceros) BE 
propinqva (Ampelisca). . » ... . 100 
propingva (Harpinia) . ...... 143 
propingva (Metopa). ..... .  EE 
propingvus (Eusirus) . ». » .».. . 340 
propingvus (Hippomedon) . .. 59 
propingvus (Mierodeutopus) 592 
propinqvus (Paroediceros) . . ,„ » .„ 246 


776 

page 
Prostomatas... „us unuieiare Sr 5 
Prostomatldae sin ir n/a} 3365 8 
Protomiedaia* 8.0 an el 615, 616 
Protomedeia. . . . .....»» 623, 738 
pröxima (Melita). . . . ». ...2 426 
proxima (Oediceroides) . » » .» - 269 


proxima (Orchomenopsis) . . . 72] 


proximus (Oediceroides) . . . . 269 
uesieylis 58.30 a 716 
Pusudslbrotus '.. cr 5:.2 2.0 983 25 
Pseudalibrotus . . :...%.» 33, 718 
Pseudoniphargus . . . ..... 729 
Pseudophthalmus . ». ». 2...» 98 
Proudotiron rl 22 0% 284 
Pseudotryphosa . . 1». Wu ia 63 
BISFSEOCBPB, ce ara 124,125 
Piorygocefus:.. ee 124, 125 
Eaipehelfos: 0. 625 
pubescens (Amphithoe) . .... . 440 
pubescens (Elasmopus) . » .».. - 440 
pubescens (Gammarella) ..... . 440 
pubescens (Gammarus). . » .»..» 440 
pubescens (Maera) . . ..... 440 
Daella (Ati) > 5 399 
puella (Gammarus) . . ...».... 399 
puella (Mieruropus). . . .... 399 
pugetensis (Gammarus) . . . .. 234 
pugetica (Ampelisca) ...... 111 
pugeticus (Ampelisca) .. ». ... -» 111 
pugettensis (Allorchestes) . . . . - 573 
pugettensis (Gammarus) . . . . 234,726 
pugettensis (Grayia). . . .»....- 742 
pugettensis (Hyale). ...... 573 
pugettensis (Iphimedia) . . . . . » 728 


pugettensis (Liljeborgia) . . 234,726 


pugettensis (Neopleustes) . . . . 728 
pugettensis (Örchestia) .. ... - 529 
pugettensis (OÖrchestia (Talitrus)) . . 529 
pugettensis (Orchestoidea) 529 
pugettensis (Paramphithoe) 728 
pugnax. (Cerapus). » . . 2.2...» 672 
pugnax (Eriehthonius). . » .».. . 672 
pugnax (Eriethonius) .. .... 672 
pugnax .(Pyctälus) 03. 2,52% 672 
pulchella (Acanthozone) 311, 312, 312, 313, 

314, 318, 320 
pulchella (Amaryllis) . . .... 24 
pulchella (Amphithopsis) . ... . 319 
pulchella (Amphitoe) .. ..... 312 
pulchella (Egidie) u... 28 130 
pulchella (Jassa) . . .... 654, 739 
pulchella (Paramphithoe) .. .. . 312 
pulchella (Pherusa) ........ 312 
pulchella (Urothoe) . .. .... 130 
pulchellus (Amaryllis) .. ..... 24 
pulchellus (Carinogammarus) . . 508 
pulchellus (Gammarus) ...... 503 


Alphabetical Index 


page 
pulchellus (Neopleustes) . . . . 312 
pulchellus (Niphargus) . . . .. 731 
pulchellus (Parapleustes). . . . . . 319 
pulchellus (Pleustes) . . .. - 312, 312 
pulchellus (Podocerus). . . - . . . 654 
pulchellus (Sympleustes) Rn, 
pulchra (Acanthostepheia) 254, 726 
pulchra (Ambasia) . .. . . 52,719 
pulchra (Schisturella) . . . . .. 719 
pulchra (Tryphosa) . --..... 52 
pulchridentata (Iphimedia) . . . 215 
yulexz KAstscus). -.. 2:2... ... 474 
pulex (Dander). . x. 2... 8 458, 474 
pulex (Cancer (Gammarellus)) . . . 474 
pulex (Cancer (Gammarus)) 474 
pulex (Gammarus) . . ....» 474 
pulex (Gammarus) . »..... 476, 506 
pulex minutus (Gammarus). . .. » 410 
pulex (Oniscus). ..». 2 .... 458, 476 
palex (Samills) u.a 474 
pulieiformis (Oedicerus) . »... - 742 
pullns (Atylos).. 0, 20.8 88 208 416 
pullus (Baikalogammarus). . . . 416 
pullus (Gammarus) . .». 22.2... 416 
pumilus (Anonyx). ». »..».. 0...» 66 
pumilus (Centromedon) . . . . . 66 
punetata (Amphithoe) . . . . . 642, 643 
punetata (Amphitoe) ... . » ee 
punctata (Ampithoe) . . . .. . 642 
punetata (Autonoe) . . .»....» 587 
punetata (Callisoma) ....... 40 
punctata (Emone) . ... 2.2...» 742 
punctata (Lysianassa). . ... 40 
punetatum (Callisoma). . -..»... - 40 
punctatus (Anonyx). . »..... 86 
punetatus (Cerapus) . . » 2... 672 
punctatus (Dercothoe). . . ... . 672 
punetatus (Gammarus). . . - - 449,639 
punetatus. (leilius). .:4. .. 0... 707 
punctatus (Lysianax) . -. 2... 40 
punetatus (Podocerus). . .» » ..» .» 672 
punctimanus (Gammarus) . . .». - 449 


pungens (Gammarus) . 400,410, 462, 481, 
482, 483, 483, 484, 494, 495 


pungens (Gammarus) . ..... 471 
pungens (Gammarus (Niphargus)).. . 472 
pungens (Niphargus) . . -» .».. 472 
purpurascens (Gammarus) . . .. 733 
purpuratus (Gammarus) . . ». . . 427 
purus (Laetmatophilus) . . . . - 696 
pusilla (Amathillina) . ..... 500 
pusilla (Ampelisca) . . . . ....105 
pusilla (Bruzeliella) ........ 739 
pusilla (Colomastix) . . ».» » 206, 207 
pusilla (Colomastix). -. . » . .... 207 
pusilla (Gmelina) . . ....... 414 
Dusilla :@a8sa) 25 Sr 655, 739 


Fi I 3 
ker 


Sc 


A ee 


u ne a Zn 


a ee Zur ee ee N at: 


page 
pusilla (Metopa) . » ..».:.. 179 
pusilla (Tryphosa) . » . . . - 470 
pusillus (Amphilochoides) . . - - » 153 
pusillus (Anonyx (Tryphosa)). . . . 70 
pusillus (Cratippus) . « » ».... 207 
pusillus (Podocerus). . ». » ».. - 655 
puteanus (Gammarus)405, 406,407, 409, 409 
puteanus (Niphargus) . . - . . » 407 
puteanus var. forelii (Gammarus) . . 406 
puteanus var. forelii (Niphargus) . . 406 
puteanus var. forellii (Niphargus) . . 406 


puteanus var. onesiensis (Niphargus) 406 
puteanus var. vejdovskyi (Niphargus) 407 


puzyllii (Ceradoeus) . . . . 498 
puzyllii (Gammarus). . ». » - . . .» 498 
puzyllii (Parapallasea) . . - 498, 734 
puzyllii (Pleuracanthus) . .... - 734 
Sn A U 670 
pygmaea (Amphithoe) . . ..... 607 
quadrangula (Metopa). . . . . . 724 
quadriceps (Corophium). . . . . 692 
quadricuspis (Cleippides) . . . . 301 
quadridentata (Acanthozone) . . 292, 303 
quadridentatus (Halirages) . . 292 
quadrifidus (Talitrus) . . . . . . - 549 
quadrimana (Ampithoe) . .. . . 635 
quadrimana (Maera) ...... 434 
quadrimana (Opis) . ». 2». .... 42 
quadrimana (Orchestia) . . .». . - 548 
quadrimana (Talorchestia). . . . 548 
quadrimanus (Amphithoe) . . . . - 635 
quadrimanus (Gammarus) . .. . - 434 
quadrimanus (Moera) . »..... 434 
quadrimanus (Niphargoides) 452 
quadrimanus (Normanion) . .. 42 
quadrispinosa (Melita) . ... . 422 
quadrispinosa (Pallasea) 377, 730 
quinquefasciatus (Gammarus araneolus 

Be A 479 
quoyana (Orchestia). .. ».... 547 
quoyana (Orchestia (Talorchestia)) . 547 
quoyana (Talorchestia) . . .. . 547 
qvadridentatus (Halirages) . . . . . 292 
qvadrimana (Normania) . . ... . 42 
qvadrimanus (Niphargoides) . . . . 452 
qvadrimanus (Normanion) . . . . . 42 
qvadrispinosa (Pallasea) .... . . 377 
qvadrispinosa (Pallasea cancelloides 

RE NE ER Dur 1 1 Sr 377 
qvadrispinosa (Pallasia) . . - . . . 377 
qvadrispinosa (Pallasiella) . . . . . 377 
ange en, ir 347 
radoszkowskii (Acanthogam- 

ZBABUR). ua au een 510, 735 
radoszkowskii (Geradocus) . . . - . 510 
radoszkowskii (Otenacanthus). . . . 785 
radoszkowskii (Gammarus). . . - . 510 


Alphabetical Index 


777 

page 
ramondi (Amphithoe) . » .» » . » . 642 
ramondi (Ampithoe). . . ...». 642 
ramsayi (Melita) . : . :... ae: 
ramsayi (Moera) . » 2 2.2.2.%0% 431 
FaDex (Üsrspns) cc. 671 
rapax (Elasmopus) . . . . 442,444, 446 
rapax (Elasmopus) . ...... 444 
rapax (Erichthonius) . . ..... 671 
raschii (Trischizostoma) . . .» - ». - 13 
rathkei (Calliopius) - - » » ...» 296 
rathkii (Amphithoe) . . » . ...» - 296 
rathkii (Calliopius) . - . . . .» . 296 
ratisbonensis (Niphargus) . . . . . 407 
recens (Allorchestes) . ». » .».. » 557 
rectimana (Orchestia). . . - - - 543 
rectirostris (Halimedon) . . . . . 251 
rectirostris (Westwoodilla) 251 
recurvatus (Crangonyx) . » ....» 373 
recurvus (Crangonyx). » » - »- » 373 
reeurvus (Gammarus) . » » 2... 373 
redmanni (Gammarus) . » »...».. 742 
reicherti (Orangonyx) - - » .». .» - 393 
reichertii (Brachyuropus) . . . . 39 
reichertii (Gammarus) . . .» 2... - 393 
reinhardi (Amphithoe). . . .... 607 
reinhardi (Photis) . 606, 607, 608, 608, 609 
reinhardi (Photis). . » ........ 607 
reisnerüü (Pallasea) .. . -....- 376 
reissnerii (Gammarus) . . » 2... .- 376 
reissnerii (Pallasea). . . . ... 376 
reissneri (Pallasea) . : ... 2... 376 
relietus (Gammaracanthus) . . - 507 
reynaudii (Amphithoe). . . . ..» - 557 
reynaudii (Neobule). . ..... 557 
Bhschotropisr 347 
rhipidiophorus (Gammarus) 410, 732 
rhipidiophorus (Niphargus) . 410,732 
rhodophthalmus (Carinogamma- 

2 13 RR SELTEN U RE Re Re Kal 504 
rhodophthalmus (Gammarus) . . . . 504 
rhodophthalmus var. mierophthalmus 

(dammarus) - ...  % 2.00%, 504 
richardi (Cyphocaris) . . . . . . 717 
richardi (Hyalella) .......- 736 
richardi (Melita) . : : . -... 732 
riehardi (Stenothoe). . . .» -» . » 194 
richiardii (Leucothoe).. . - . - - 167 
richiardii (Leueothoe) . . - -» . » » 168 
riisei (Eusiropsis). - » » - ...» 343 
rimapalma (Naenia) . .»..... 620 
rimapalma (Noenia). .......- 620 
rimapalmata (Naenia) . ...... 620 
rimapalmata (Noenia) . . 2»... - 620 
rimapalmata (Podoceropsis) 620 

 rissoanum- (Ieridium) 201 
rissoanus (Phlias) . . -. »...... 201 
rivularis- (Lepleurus) . . .. . . 715 


778 
page 
robertsoni (Bathyporeia) . . . . 121 
robertsonü (Bathyporeia). .. - : » 121 
robertsoni (Sophrosyne). . . . . 21 
robusta (Haploops) . . ». -»... 118 
robusta (Metopa) . . . ... 173, 724 
robusta (Metopina) . ..»...... 724 
robusta (Sthenometopa) -. » . - »- . 724 
robustoides (Gammarus) . . ... - 458 
robustum (Corophium) . .... 689 
robustus (Cheirocratus) . . 419 
robustus (Gammarus) . . . ... - 742 
robustus (Hippomedon) . :. . . . 59 
robustus (Niphargus plateaui) 731 
roeselii (Carinogammarus) 506 
roeselii (Gammarus). » . : 2... 506 
röseli (Gammarus) . ... 2... 506 
roseus (Carinogammarus) . . . . 734 
roseus (Ütenacanthus) . . . . .. .» 734 
rossi (Orehomenopsis) . . . . .» 721 
vrostrata (GHHtans) nie 156 
rostrata (Oediceroides). -. - . .. 268 
rostrata (Oediceropsis). -. » » ..» » 268 
rostrata (Pontharpinia) . . .. .- 146 
rostrata (Rachotropis),. . » » » » » 353 
rostrata (Rhachotropis) . . . . . 353 
rostratus (Halimedon) . . . ... » 268 
rostratus (Oediceroides) . . -. - - 268 
rostratus (Phoxocephalus) . ... . 146 
rostratus [Phoxzus). + us: 5% 146 
rostratus (Urothoe) . . . . 146 
Hominsne rauen 354 
rubella (Ampelisca) . . .. . 104, 722 
rubella (Ampelisca) » » 2... . 107 
rubella (Amphithoe). . ...... 640 
ruber (Carinogammarus) 734 
ruber (Otenacanthus) .. .. 2... 734 
» Tuber fUrALB68) 0,9... 132 
rubiformis (Cerapus). . . .. - 673, 740 
subre Iyalo)! en 572 
rubra (Nicea). ... . Eee Ale SOER 
Tubr& (Urothos) :, u... ,% 132 


rubricata (Amphithoe) 557, 634, 634, 635, 
635, 635, 636, 637, 637, 638, 638, 639, 639, 
640, 641, 641, 641, 641, 642, 644 


rubricata (Ampithoe) . . . . . 639 
rubricatus (Astacus). .....».. 639 
rubricatus (Cancer (Gammarus)) 639 
rubricornis (Allorchestes) . . . . 585 
rubrieornis (Cerapus) . . .. . 673, 740 
rubricornis (Erichthonius) . . . . - 740 
rubrieornis (Eriethonius) . . . . 740 
rubrieornis (Hyale (Allorchestes)) . . 585 
rubromaeulata (Maera) ...... 430 
rubromaeulata (Moera) ...... 430 
rubromaeculatus (Ceradocus) . . . 430 
rubromaeulatus (Ceradocus) 439 
rubromaculatus (Gammarus) 430 


Alphabetical Index 


page 
rubropunectatus (Talitrus) . . . . . 742 
rubrovittata (Metopa). . ... . 180 
rudis (Hyale) . : . . „2... 573 
FRA TNIGBM).. u. 202: A ER 573 
ragoans (Atylas).. . serie 402 
rugosus (Gammarus) » » » 2... 402 
rugosus (Mieruropus) . . ... . 402 
runeicorne (Corophium). . . . . 689 
runeinatum (Corophium) . . .» . . . 689 
rupicola (Allorchestes) . .... .- 573 
uplcola «Hyale):: ::.2..0%..% 573 
sabatieri (Siphonoecetes) ..684 
sabini (Amathilla) ...... 387, 387 
ssbinl (Oammarus). . sun mut 387 
sabinii (Amathia) . » 2... 1.2. 387 
sabrinae (Amphilochus) . . ... » 155 
saginatus (Oediceros) . . » .. . 244 
saginatus (Oediceros) » » ».. - . 24 
salenskii (Amphithoe) . . ».. .. . 590 
salmonis (Corophium). . . .. . 692 
saltator (Cancer (Gammarus)) 525 
saltator (Talitrus) =: 2, 2% 525 
Sancho ... u. % a ee 288 
saphirinus (Echinogammarus) . . 482 
saphirinus (Gammarus) . ».... 482 
sarmatus (Echinogammarus) . . 487 
sarmatus (Gammarus) ». ..... 487 
sarsi (Ampelisea) . .ü.i. 54% 111 
sarsi (Busiroides)i:: +... 205% 729 
sarsi (Gitana) a 155 
sarsi (Gammarus) .. .....» 733 
sarsii (Gitana) - » « » ... .. 155,156 
sarsii (Metopa) . »- - » 2.2... 190 
sarsii (Proboloides) . ». . .... 190 
sarsi (Normanion) . ...... 42 
sarsi-(Iryphosa)- + 2°... 248% 70 
sarsi (Iryphosella) » ».. ».. 0.2... 70 
saundersii (Seba) . . .. . - 163, 724 
saussurei (Bathymedon).. . . . » 256 
saussurei (Halimedon). . . . » 256, 256 
savi (dammarus). . . » 2... 513 
Bay (Maera) - - 5 wir nn ne 6 DAR 
sayıı (Moera).... wi nes . 513 
sayana (Scamballa) . . ...... 540 
sayi (Allorchestes) . . . . . .. 585 
scabripes (Ampelisca) . .. . . 722 
scabripes (Megalorchestia) . . - . - 528 


scabripes (Orchestia (Talitrus)).. . . 528 
scabripes (Orchestoidea) . . . . . » 
Bosmballs 2 00, 55% 530, 543 
schamanensis (Echinogammarus) 489 


schamanensis (Gammarus) . . » . . 489 
scheeleana (Synopia) . . . . . . 272 
schiedtei (Oressa) . . ». 2... 191 
Schisturella 2... um Te. 719 
schmardae (Anonyx) . . .. . 87,721 
schmardae (Iehnopus) . » .» ....» 87 


ee a a nn a nn HE lat kin im nes nach Ih ar 


page 
schmardai (Socarnes) ee 
schmidtii (Hyale) . . »...... 571 
s6hmidtii (Niees) 2... ©. 571 


schneideri (Carolobatea) . . . . 252 
schneideri (Halimedon) . . . . . . 252 
schneideri (Monoculodes) . . . . 263 
a a Se ar 308 
schwammerdamü (Atylu) . ... . 330 
seirtes (Gammarus sophianosii var.) . 494 
seissimana (Maera) . » . 2... 485 


seissimana (Moers) . - . . 2... 435 
seissimanus (Gammarus) . » ».. 435 
seitulus (Dexamine) . ..... 517 
Moomelocherrus . cu: a. 61 
seutigerula (Orchestia) . .» .... 544 
seutigerula (Talorchestia) . . . . 544 
N 162, 724 
sechellensis (Eriopisa) . . » . . 732 
Becunda (Batea): . .....2..2% 129 
secundus (Synopioides) . -. . . . 227 
seidlitzii (Carinogammarus) . . . 503 
seidlitzii (Gammarus) . . ..... 503 
selkirki (Orchestia) . . . . .. . 538 
semicarinata (Amphithoe) .. . . - 449 
semicarinatus (Gammarus) . . . - » 504 
seminuda (Allorchestes) . . .. . - 574 
semmuda (Hyalo). ... 2 = 20.% 574 
semiserrata (Maera) . .. ..... 431 
semiserrata (Megamoera) . . ... 48] 
semiserrata (Syrrhoe) . . . .. . 283 
semiserratus (Ceradocus) . . . . 431 
semmiserrata (Megamaera) . . . . » 431 
septentrionalis (Dulichia) . . . . . 713 
septentrionalis (Lysianax) . . . . . 38 
serra (Acanthonotus) . . .. . 50918 
serra (Amphithoe) .. .. . : 218 
serra (Perioculodes) . . . . . . 726 
serrata: (Bruzelia).. .....0.. 2... 279 
ne a 113 
Berrata (Byblisy 2....2.22.0, en 
serrata (Harpinia)....:2. 2%, 142 
serrata (Megamoera) .... . .. 4831 
‘ serrata (Melphidippa) . . . .. . 337 
serrata.(Neohela) ». 2. ...... 337 
serrata (Orchomene) ...... 44 
serrata (Syrrhoites) -. ...... . 279 
serraticandata (Ampelisca) . . .. . 107 
serraticarpa (Leucothoe). . . . . . 167 


serraticauda (Atyloides). . . 362, 729 
serraticauda (Atylu) . ». ..... 862 


serraticaudata (Ampelisca) . 107, 722 
serraticornis (Amphithoe) . .. . . 296 
serratierus (Dexamine) . . .. . 735 


serratipalma (Leucothoe) . . . » . 724 
serratipes (Amphilochoides) . . 723 
serratipes (Probolium) . . .. . 161 
serratipes (Probolium) . . . . ... 723 


Alphabetical Index 779 


page 
Sören, (Eryphoss) 2... 2 2.4055 62 
serratum (Acanthonotosoma) . . 218, 219 


serratum (Acanthonotozoma) . . 218 


serratus (Acanthonotus) . . . . 218,219 
MUEREBGe LAROBSEN. ee 4 
serratus (Hippomedon) . ... . 719 
serratus (Oniscus) : . ...... ".. 218 
serratus (Örchomene) . . . ».. 44,46 
Borratus hlas): 5 2022 201 
serratus (Syrrhoites) . . ... . 279 
serratus (Vertumnus) . . „2... 218 
serrula (Elasmopus) . . .... 733 
serrulata (Orchestia) . . .... 535 
setiger (Parelasmopus) . ... . 732 
setipes (Gammarus (Maera)) . . . . 423 
sehen. (Maars) . u.a 423 
BOLIDOR CEOUEB) 2 45 26.0 a ae 425 
setosa (Amphithoe) . . 2... . 644 
386983. (Grubis)?4:272 10, 644 
setosa (Haploops). ». ...... 117 
setosa (Haploops) u „2... . 118 
setosa (Stenothoe) . . .» .... 125 
setosus (Gammarus aheneus var.) . . 487 
shetlandica (Liljeborgia) . . . - - . 418 
similis (dammarus): . ... 12:..0% 466 
min (Hoplonye) 127202722, 220 76 
similis (Stegocephalus) . ... . 91 
similis (Tmetonyx) . ...... 76 
simoni (Gammarus) . ... . 3222408 
simplex (Amphitoe (Iphimedia)) . . 3683 
Bimpiez (Akylus) „u... 04 2% 364 
simplex (Iphimedia). .. ..... 364 
simplex (Monoculodes) . . . . . 264 
simplex (Paramoera) . ..... 363 
simplex (Phoxocephalus) . . . . 136 
simplex (Phoxocephalus) .... -» 139 
simplex (Phoxus) ... . 2..:.% 136, 136 
sinhalensis (Stenothoe marina var.) 725 
sinuata Metopa) : - . 2. 2.2, 174 
Siphonaecetes . .... R . 682 
Siphonaecetus ..... ver 682 
Siphonocetus . . .....  } 
Binhonoodelus 2. ee ne. 682 
Siphöonoeeetes ..n . 2... .% 663, 663 
Siphonoecetes . ...... 681, 740 
Siphonoeeetus . ».... rer IR 
sismithi (Cerapus) . . .. .» s 666 
sitchensis (Gammarus) . . » .» ». » 476 
smaragdina (Brandtia) . . . . » 3% 
smaragdinus (Atylus) . . . . » = 898 
smaragdinus (Gammarus) . ... » 398 
smaragdinus var. intermedius (Gam- 
a re 398 
smithianus (Siphonoecetes) . . . 740 
smithi (Autonoe) . ».» 2... . 737 
smithi (Lembos) . »...... . 737 
smithi (Paratylus). . -» .» 2... 332 


780 

page 
smitti (Atylus) » » ..-...» Pe 332 
smaittil (Atylus) ss a rn 332 
smitti (Nototropis) - - .». »...- 332 
smitti (Paramphitho@) . ». ».... 332 
smitti (Paratylus) . « » » 2...» 332 
Soosinella . 2 ee 719 
Socames . » »«. .... R ....86 
Sosarnioides s 8 0. vn NEN 47 
B66arnöldes ı :. 1.3 Zen ai 47 
sokotrae (Elasmopus) . . » ...» 732 
sölsbergi (Metopa) - ». ..... 181 
solskii (Amathilla) . .». ...... 382 
solskii (Gammarus) . . ... 2... 382 
solskii (Paramieruropus) ...882 
sophiae (Echinogammarus) . . . 485 
sophiae (Gammarus) . ». » . 2... - 485 
sophiae(Podoceropsis) 619, 620,621, 660, 661 
sophianosii (Gammarus) . » ». +» 494 
sophianosii (Heterogammarus) 494 
sophianosii var. sceirtes (Gammarus) . 494 
sophia (Podoceropsis) . .». . .. . 620 
BODHLOBYDE u r8s SE 21 
speciosus (Gammarus) » » » 2... 515 
spectabilis (Metopa).. . »..... 176 
speculans (Cerapus) . . » » » ee ; 
speculans (Dereothoe) . . » »». . 674 
spencebatei (Amphilochus) . . . . » 161 
spence-batei (Amphilochus) . . . 723 


spence-batei (Probolium) . . 161,723 
spenceri (Neoniphargus) . . . . 73l 


spenceri (Unimelita). . » ».... 731 
ee ET EN a RR 716 
spetsbergensis (Gammarus) . . . - - 742 
spinata (Amathillina cristata var.). . 501 
spinescens (Andania) -» 2». .... 95 
spinescens (Andaniexis). . . . - 95 


spinicarpa (Leucothoe) . . . . . 165 
KRISE (Leueothoe) 164, 165, 165, 166, 

166, 168, 168, 168, 168 
spiniearpus (Cancer (Gammarellus)) . 165 


spinicarpus (Gammarus) . . .» ..». 165 
spinicorne (Corophium) . ».... 691 
spinicorne (Corophium) . . . . . 692 
spinicornis (Ichnopus) . .... 52 
spinicornis (Lysianassa) . . .. - 89, 52 
spinidigitus (Urothoe). . . .. . 722 
SpESHar. en a en, 134, 140 
spinifera (Lysianassa) . . ..... 742 
spinigera (Amathilla) 384, 385, 385 
spinigera (Amathillopsis) . . 384 


spinimana (Ampelisca) . . . 109, 722 


spinimana (Amplisca) . . 2... 109 
spinimana (Orchestia) - - 2... ... 531 
spinimanus (Elasmopus) 733 
spinimanus (Nannonyx). .... 35 
spinipalma (Orchestia). .» .... 552 
spinipalma (Talorchestia) . . . . 552 


Alphabetical Index 


page 

spinipes (Ampelisca) . .... . 106 
spinipes (Gammarus) . ». . 2... 742 
spiniventris (Amphithonotus). . . . 516 
spiniventris (Autonoe) . . . . » . . 595 
spiniventris (Dexamine). - . . . 516 
spiniventris (Lembos). . .. . . 595 
spiniventris var. pontica (Dexamine) . 515 
spinosa (Acanthonotus) » » . .. . 515 
spinosa (Amathillina) . . . . .. 501 
spinosa (Amphithoe) . ...... 515 
spinosa (Axelboeckia). . ... . 391 
spinosa (Boeckia) . . ... . 5; 
spinosa (Dexamine) 831, 331, 516, 516, 517, 
517,518 

spinosa (Dexamine). . .... +51 
spinosa (Iphimedia) . ». » 2... 212 
spinosa (Melphidippa) . . . . . . .. 385 
Beinase: (Moers) 7002 Br 431 
spinosa (Panoplaea) . » »».... 212 
spinosa (Panoploea) . . .».... 212 
spinosissima (Dulichia) . . . . - 709 
spinosissimus (Laetmatophilus) . . . 697 
spinosissimus (Spinifer) » . » .. » 134 
spinosus (Cancer (Gammarus)) . . . 515 
spinosus (Öeradocus) » 2» 2... 355 
spinosus (Gammarus) . »..». 335,515 
spinosus (Paraphoxus) . .... 723 
spinulicauda (Nototropis) - » » .'. 331 
spinulicauda (Notrotopis) . » » . - 331 
spinulosum (Corophium) 688 


squamosus (Amphilochus). . . . 161 


squamosus (Hippomedon) . . ... 59 
squatinae (Ichthyomyzocus) 742 
stagnalis (Gammarus) . » » .».. 474 
stanislavi (Gammarus) . « » 2... 494 
stanislavii (Gammarus). .....».. 494 
stanislavii (Heterogammarus) . . 494 
stationis (Mierodeutopus) . . . . 590 
Stebbingia . ... - ER RNE 358 
stebbingi (Anamixis) . . » ». » 724 
stebbingi (Argissa) . . -..... 277 
stebbingi (Hoplonyx) . ».».... 720 
stebbingi (Hyale) . - . . . . 574,736 
stebbingi (Lysianax). . » ».. .» SER 
stebbingi (Socarnoides) . . . . -» 47 
stebbingi (Tmetonyx) . . ... . 720 
steenstrupi (Glaueonome) . » . . . 679 
Stegocephalidae........ 88 


Stegocephalinae. ....2.....88 
Stegocephaloides 
Stegocephalus. . .». ».... TE 


stegoceras (Leucothoe) . . . . . 724 
BERODER EEE ER TREE 
BER 1 en a TE SER 68. 
BLEDIe area rar 2 88 
stenophthalmus (Echinogamma- 
TUST U NR LI I U 


Alphabetical Index 781 


: page page 
stenophthalmus (Gammarus) . . . . 489 | suensis (Megamoera). ». »..... 442 
Stenopleura. -. » » v2 0. GIRL BUISBEOR' 5.0 a 22 ra 124 
1 N RE 816 | sulensoni (Orchestia) - -» » .» . . 541 
Stenothoe . . » =». * 2... . 192,725 | suluensis (Gammarus) . . . 2»... 417 
Stenothoidae. ... . . . 192,725 | suluensis (Megamoera). . »... . 417 
Stenothoides . » » » 2... +. 725 | suluensis (Parelasmopus) . . 417,732 
Stenöthoinsae *.:.:.. ... .....: 192 | Sunamphithoß s° -- .: „> ce. fer 2 645 
a re 804 | Sunamphitoe . » » 2... .. 645 
stewarti (Allorchestes) . -. » . » .» - 574 | sundevalli (Cheiroeratus). . » . » . 418 
Brawarti (Eiyalö) 2.0... 574 | sundevallii (Cheirocratus) . . . . 418 
Sthenometopa . ..»..- ... 0. 724 | sundevallii (Gammarus) . . .... 418 
stilipes (Exunguia) . . ». . : . » 207 | sundewalli (Cheiroeratus) . . . » . 418 
Biimpsonella.... . „2. 0 ....% 588  swammerdamei (Amphithoe) . . . . 330 
a 588 | swammerdamei (Nototropis) . . 330 
stimpsoni (Amphithoe). . .» . . . .» 642 | swammerdamii (Amphitoe). . . . . 330 
stimpsoni (Ampithoe) . . .. . . 642 | swammerdamii (Atylus) . . 330, 832, 332, 
stimpsoni (Iphimedia) - . -. . - - 217 333, 334 
stimpsoni (Monoculodes) . . . . » - 261 | swammerdamii (Paratylus) .. .. . 330 
stolzmani (Hyale) . . .».... - 574 | swammerdami (Paratylus) . . . . . 330 
8tomacontion . » :» - ......» 16 | swammerdammii (Atylus) . ... . 330 
strauchi (Gammarus) . .» ..... 415 | sylvatieus (Talitrus). . .... . 524 

strauchii (Gammarus) . . . .. . .» 415 | sylviecola (Orchestia). . 524, 542, 557, 558 
; strauchii (Hakonboeckia) . . . . 415 | sylvicola (Parorchestia) . . . . - 558 
3 stroemianus (Oniseus) . . ...... . 742 | Sympleustes . ....... ER BET 
sturionis (Lafystius) - » .». - ».» 208 | Synamphithoe. . ». .» .... SE 8° 
sturionis (Laphystius) . . »... 208 | synaptochir (Platophium) . . ... 741 
stygius (Gammarus) . . „ ...... 407 | symaptochir (Podocerus). . . - . 741 
stygius (Niphargus) . . . » 2... . 406 | Synchelidium . . . » 22... 241 
stygius (Niphargus) . . ... ... 7 1 BHoDle EEE 271 
Stygobromus .. . 2... 48870 I Synopidae . 2. wie ein a 270 
ee Fe ar da RL 870 | Synopiidae ..... 2 ...% 270 
EONBEHER 7 TE 229 | Synopinae - “vn 270 
stylifera (Leucothoe) . . . . . - 108 | Bynopieides..; tr 226 
stylifer (Allorchestes) . . . . - - Se>:; Spturella 277 368 
subcarinata (Elasmopus) . . . - . » 441 | syriacus (Gammarus) . . - . » .» 475 
subearinata (Megamoera). . . . . . BAT | Swechos: .; 2er: ut 2878 
subcarinata (Moers). . 2... ....44l | Syrrhoe. . 2... 281 
subearinatus (Carinogammarus) . 505 | Syrrhoidae. .... 22... 273 
subearinatus (Blasmopus) . . . . 441 | Syrrhoinae. .... 2.2.2... 273 

„. subcarinatus (Gammarus) . ..... . 505 | Syrrhoites . . 2... 2.2.20. 279 
a RT N 206 | taczanowskii (Acanthonotosoma) . . 382 
subnudus (Gammarus) . . ».. 465 | taezanowskii (Gammarus) ... ..- 382 

. subnudus (Monoculodes) . . . . 266 | taczanowskii (Paramieruropus) . 382 
subtener (Gammarus) . . ....” 742 | tahitensis (Cyelocaris). -. . . »- - 30 
subtenuis (Chiltonia) . . .. . . 735 | tahitensis (Orchestia) . » .... .- 543 
subterranea (Calliope) . -». ... . 294 | Talitridae . ........ .. 523 
subterraneum (Acanthonotosoma) 294,295 | Talitrini. ».. 2. 2.2.2220. 523 
subterraneus (Caliopius) .i.-.’*:. . 294 | Palitroides . - ... 2... 2 0... 527 
subterraneus (Crangonyx). . . . 371 | talitroides (Atylus) . » » 2... 400 
subterraneus (Crangonyx) . » » . . 389 | talitroides (Gammarus) . » ».. .» 400 
subterraneus (Gammarus) . . . . . 410 | talitroides (Micruropus). . . - - 400 
subterraneus (Niphargus) 407,408, 408,408, | Talitronus .. .. 22.2220... 527 
410,410 | Talitrorchestia ...’... ...% 524, 526 

subterraneus (Niphargus) . . 410,732 | Talitrus . : » ».. .. 218,218, 530, 532 
subterraneus (Paraleptamphopus) 29 | Talitrus. ... 220. een... 524 
suceineus (Gammarus aheneus var.) 487 | talitrus (Gammarus) . » 2... ... 478 
‚suensis (EBlasmopus) . .... . 442 | talitrus (Poekilogammarus) . . -» 478 


782 

page 
Tlorchestes*. 2. Ger 543 
Talorchesua 1, 0 ee ae ar 536 
Talorchestia . -. .»..... R 545 
tasmaniae (Atyloides) . ». .».»- 361 
tasmaniae (Pontogeneia) 361 
tatrensis (Niphargus) . . . . » - 410 
tauriea (Brubis) .. .+. .-... 00% 644 
taurica var. massiliensis (Grubia) . . 644 
taurus (Ichnopus) . ». ». » >»... 52 
taurus (Ichnopus). . » »..»... 53 
teeticauda (Gallea) . . .....- 723 
telluris (Orchestia) . » » » » » 537,551 
telluris (Talorchestia). . -» »- - » D5l 
tenebrarum (Boruta) . - .... 368 
tenella (Amphithoe). . » »»». 574 
tenella (Hyale) . ... +»... 574 
tenella (Maera) . . - . .....%» 434 
ten6ls (Mae) 36 5 438 
tenella (Moera) ». ». .....».. 434, 438 
tenella (Stenothoe) . . .». »... 196 
tenellus (Gammarus). . . .. - 438, 470 
tenellus (Pardaliscoides) 225 
tenera (Maers) ...14.35 0 434 
tenuieorne (Corophium) . » »» .» » 688 
tenuicornis (Ampelisca) . » . » - 110 
tenuicornis (Amphithoe) . . . . 429,515 
tenuiecornis (Amphito& (Melita)) . . 429 


tenuicornis (Dexamine) . . . . 515,516 


tenuicornis (Eurystheus) . . . . 738 
tenuicornis (Gammaropsis). » » »- » 738 
tenuicornis (Gammarus) . » » x... 429 
tenuieornis (Glycera) . »....».» 6l 
tenuicornis (Glycerina) . ». ».. 6l 
tenuicornis (Ischyrocerus) . . . . 660 
tenuicornis (Maera) . » »».».» . 732 


tenuicornis (Melita) . . -» .» . . 429,429 


tenuicornis.(Moera) .- . . - 429 
tenuicornis (Paramoera) . . ... » 429 
tenuieornis (Photis). - - - » » » 608 
tenuicornis (Podocerus) . - .» » . . 660 
tennimana (Maeraä) . , . .:..2...486 
tenuimana (Metopa). . . - ... 181 
tenuimanum (Synchelidium) . „ . 243 
tenuimanus (Amphilochus) . . . 150 


tenuimanus (Amphilochus) . . . 151,152 


tenuimanus (Gammarus) -..... 436 
tenuipes (Bathyporeia). -. » .».. . 120 
tenuipes (Uratippus). » x x...» 207 
tenuipes (Mierodeuteropus) . . . . » 587 
tenuipes (Mierodeutopus) . . .» . . 587 
tenuipes (Pardalisca) . . . . .. 223 
tenuipes (Polycheria) -. . . . . . 520 
tenuipes (Vijaya) .- . .. Sri 
tenuirostratus iimiohee) Br Yo 
tenuis (Autonöß) ..,: =. 0.0.» 600 
tenuis (Crangonyx) - . -» . » . ..372 
tenuis (Gammarus) . ». 2»... .. 600 


Alphabetical Index 


page 
tenuis XL:8m7b08) 2.2 3.05 20255 600 
tenuis (Mierodentopus) . ».... 600 
tenuis (Mierodeutopus) . . » x.» „ . 600 
tenuls (Orchestia) - .. - 2 ». 2.5 557 
tenuis (Parorchestia) . .... . 557 
Doraleuier 23; 0,252, 2a 162 
terebans (Chelura) . ...:.... 693 
terebrans (Chelura) . . ..... 693 
tergestinum (Probolium) . .... . 196. 
terraereginae (Talorchestia) . . . . 552 
terschellingi (Orthopalame) 604 
Eossarope 2:0 ee 275 
tesselatus (Monoculodes) 264 
tessellatus (Monoculodes) .. .. . 264 
testaceus (Echinogammarus) 485 
testaceus (Gammarus) . » » 2... 485 
testudo (Acanthonotus) . ».... 323 
kestudo (Vpiseus) ... is ars 201 
testudo (Pereionotus) . . . . 201, 726- 
tetrachantus (Gammarus) . . . . 733 
PBetradsion:. +, nee 
Tetromatides ... ru eu 97 
Taomalae: 32.4 a re 98 
Thalitros, 2 >... msn aan 524 
Thelorcheslia . . sin un Di 
thea (Dexamine) . ....... 516 
Ihersites 7.34 422.00 a ie Alp Foren 
N re . 805 
DUOOlAOR . >, 4 0, ia ER 
thompsoni (Eurystheus). . . . » 612 
thompsoni (Gammaropsis) . . . » . 612 
thompsoni (Maeroides) . . ». . . . . 612 
thompsoni (Tirop)...:... .. 2.5: „2 701 
thomsoni (Eurystheus) . .... 613 
thomsoni (Gammaropsis). . . .. .» 613 
thomsoni (Megamoera) . . » . . . .. 439 
thomsoni (Nannonyx). . ». . ... 36 
thomsoni (Neoniphargus) . . 404,731 
thomsoni (Palinnotus) . . -. . . . 202 
thomsoni (Pereionotus) . » » » » » 202 
tiberiadis (Orchestia) . . . . . .. 540 
FEOB ee re EEE 
Pironidao . 1... 00.0.0: re 
titii (Mierodeutopus) . . . .. . 594 
SIIDEIORVE rn 73, 720 
tongensis (Amuhiikbe a SO 
tongensis (Amphitoe) . . ». » ... 642 
tongensis (Ampithoe) . .... . 642 
topsenti (Aristias). - . -» 2... 718 
torelli (Ceradocus) . . .». » . ... 432 
torelli (Gammarus) . ».....x. 432 
toreli KMaBie). ee »: ...488 
torelli (Megamoera) . » » » .... . 482 
toxophthalmus ass 490 
toxophthalmus (Gammarus) . . . . 490 
traillii (beucothoe) . . » ». . . 164 
translucens (Apherusa) . . . » . 308 


EEE 


Alphabetical Index 783 

page page 

translucens (Panoplaea) . .». ... - 308 | tubereulata (Pleustes) . - ..... all 
traskiana (Orchestia) . - - -» » » 534 | tubereulatus (Atylus) . »..... 397 
triaenonyx (Corophium). . .. » 740 | tubereulatus (Gammarus) . .... 397 
triearinata (Acanthozone) . .» .. - 326 | tuberculatus (Ischyrocerus) . . . 6#1 


tricarinatus (Acanthechinus) . . . . 326 
triecarinatus (Actinacanthus) . . . 326 


triehobostryehus (Aora) . » ». » 587 
trieristata (Acanthosoma) . . . . - 321 
trieristata (Epimeria) - » ».... 323 
trieristatus (Leptocheirus) . . . . 629 
trieristatus (Ptilocheirus). . » » » » 629 
trieuspis (Acanthonotus) . .». .» .. » 301 
trieuspis (Acanthozone) . . . . 301,301 
trieuspis (Cleippides) . - . : » » 301 
trieuspis (Dexamine) . » ».... 301 
trieuspis (Paramphithoe) . . .». . .» » 301 
krieuspis (Pheruss) - . ...:..-.... 291 
tridens (Ampelisca) . . : . ... 722 
tridens (Leucothoe) . . . ... . 166 
tridentata (Amphithopsis) . . . »- - 305 
tridentata (Apherusa) . .. ... 305 
tridentata (Dexamine) . .».... 305 
tridentata (Paramphithoe) .. . . - 305 
tridentata (Talorchestia) . . . . . 546 
tridentatus (Eurystheus) . . . .. . 618 
tridentatus (Halirages) . -».... 305 
trigonica (Tryphosa) ..... . 70 
trigonieus (Hippomedon). . » . . » 70 
trigonocheirus (Orchestia) . . .». . . 5831 
trioculata (Hirondellea) . ... . 16 
tripudians (Talitrus). . . ..... 742 
Trischizostoma . . ...... 12, 717 
Trischizostomatina ...... 8 
tristanensis (Ischyrocerus) . . . . . 650 
tristanensis (Parajassa) . . .. . 650 
tristanensis (Podocerus) . .... . 650 
a an 330 
a KL ER TE RER 517 
a Er 347,354 
truneata (Harpinia) . . . .... 144 
truncatipes (Amphithoe) . . . .. - 435 


truncatipes (Maera) . . 434, 435,440, 445 


truncatipes (Moera) . . . . . . 435,512 
truneatus (Gammarus) .. . ... .- 742 
en RER nr 68, 720 
en 77, 81,86 
Zusphosella‘ .. 2. ....'. re 1: 
ERNTDBOBOHB:. 2722 ee. 67, 720 
BERSDHORILEN: 4. ee, 77 
tubereulata (Brandtia) . . . . . 397 
tuberculata (Bruzelia). . .... 275 
tubereulata (Dulichia) . . . . 710, 710 
tuberculata (Dulichia). . . . . - 713 
tubereulata (Epimeria) ..... 323 
tuberculata (Gmelinopsis) . . . . 414 
tubereulata (Orchestia) . -» . . . . 527 


tuberculata (Orchestoidea) . . . 5297 


tuberculatus (Laetmatophilus) . . 696 
tuberceulatus (Laetmatophilus) . 696, 697, 


697, 703 

tuberceulatus (Monoculodes) . . . 265 
tubereulatus (Pleustes) . .. . . 311 
tubereulatus (Podocerus). . . . . . 661 
tubereulosa (Naenia) . .. 2... 620 
tubereulosa (Noenia) . ». ».... 620 
tubicola (Haploops) . . ». . . . 116, 117 
-tubieola (Haploops) . ». ». » .. . 117 
tubularis (Cerapus) . . . . . 667.740 
tueuratinga (Örchestia) . .» .» . » . 534 
tucurauna (Orchestia) . . . . . - 534 
tumida (Nieippe) . . »».... 226 
tumida (Örchestia) . . ... . 550, 554 
tumida (Rhachotropis). . . » .». » 851 
tumida (Talorchestia) . . . . . - 550 
tumidus (Anonyx). ». 2» 2... 49, 50 
tumidus (Aristias). . -» ».... 41,50 
tumidus: (Aristiasy‘,". . . ...22% 49 
tunetanus (Gammarus) . . . .. 477 
turgidus (Anonyx (Onisimus)) . » » 26 
turgidus (Onisimus). . . .»..». 26 


typhlops (Anonyx) -. »».2.....66 
typhlops (Centromedon).. . .» . . 66 
typhlops (Lepidepecreum). . . . 78 


a NEE... 
typica (Ampelisca) . ». ..... 109 
%96108.(A0r8): Sa 587 
fypica (Argassa).  .. 22: 2 877 
typiea -(Boeckia) . .-.:... 2... 628 
typica (Bruzelia) . -. ...... 274 
typica (Haplocheira) . .. . . . 609 
typica (Iphigenia) . ..... . . 204 
typiea (Iphinotus)... » . 2»... 726 
typica (Opis) . » » » - el TI 
typica (Paradulichia) . ..... 714 
typiea (Paranaenia) . »....... 615 
iypiea (Bebay. Sr rn 163. 
typieum (Teratieum) . . » .» 2... 163 
typieus (Iphinotus) . . -. . - 204, 726 
typicus (Metaphoxus). . . . . » 138 
typicus (Siphonoecetes) . . . . » 682 
typieus (Siphonoecetes) 683, 683, 684 
typieus (Tetromatus) . » ».... 109 
ultramarina (Synopia). . » .»» .» 271 
ultramarina (Synopia) . 272, 272, 273, 273 
umbo (Anonyx).. . . 0. +... 80 
umbo (Lepidepecreum) . . . » . 80 
umbo (Lysianassa) . »..... a: ) 
umbonata (Pseudotryphosa) . . » . 64 
umbonatus (Anonyx) . ..... . 64 


umbonatus (Ichnopus). . » .» ». 64 


’ 


784 


umbonatus (Uristes) . « .....64 
umbo (Orchomene) ä 
uneinata (Ampelisca) . . . . 105,721 
uneinatus (Atylu) -. »-..»... 
uncinatus (Paratylus) 
Uneiola. . 
uneirostrata (Pontharpinia) . 
uneirostratus (Leptophoxus) . . + » 
uneirostratus (Phoxocephalus) . . . 
uneirostratus (Phoxus). ». » . » » » 147 


676 
147, 723 
723 


undata (Naenia) -. » «2»... . 620 
undata (Noenia) ».. » v2... 0.% 620 
unguiserratus (Gammarus) . . . »- - 742 
Unimelitae '. . =. +. SEE A RR 
Ueistan 2.0 ee 63 
urodus (Lysianax) -. » » 2... 718 
TEROEHOO.L: 2 ana ba 128, 722 
Teikae 2 war 35 sr 
Urothoides . ». .....- . 132 
ussolzevi (Gammarus) . » »...- 488 
ussolzevii (Gammarus) . . » 2... 488 
ussolzewii (Echinogammarus) . . 488 
ussolzewii (Gammarus) . ».... 488 


ussolzewii var. abyssorum (Gammarus) 488 


uzzolzewii (Echinogammarus) . . . . 488 
vablıi (Anonya) 2. in. ee 57 
vahlii (Ephippiphora) . . » »... 57 
vahlii (Lysianassa) . » » 2.2... 57 
vahlii (Socarnes) -» » ». .». 2... 57 
vahli (Lysianassa) -. ..: 2.2... 56 
vahli (Soearnes) . - »...... 56, 57 
vaillantii (Amphithoe). »...... 639 
vaillantii (Ampithoe) .. ... . 639 
‚vaillantii var. pontica (Amphithoe) . 639 
BR URL, ir A 
WIERHGRB. a. er 8 
valida (Amphithoe) . . . . 635, 643, 738 
valida (Ampithoe). ..... 635, 738 
valida (Masera) .. ...... N 423 
valida (Melita) . . -. . er 423 
valida (Stenothoe). . » ..... 194 
valida (Stenothoe) . » » . . . 195,19. 
valida (Sunamphithoe) ...... 643 
validum (Cratophium) . » 2 2... 654 
validus (Gammarus (Maera)) . . . . 423 
validus (Pleonexes) . . .». .... 643 
validus (Podocerus) ». ». ».. 2...» 654 
validus (Stenothoe) . » » » 2... 19 
variegata (Janassa) - » 2». 2... 689 


variegata (Lysianassa) . . ... 39 
variegatus (AnonyxX). ©» 2 2.2... 
variegatus (Lysianax) - . » 2» 2...839 
variegatus (Podocerus) . »... 
vedlomensis (Atylus) - 2 2... 
vedlomensis (Dexamine) . ..... 
vedlomensis (Nototropis) . . . » 
vedlomensis (Paratylus) .. 2»... 


Alphabetical Index 


page 
vejdovskyi (Eucrangonyx) . . . 389 
vejdovskyi (Niphargus puteanus var.) 407 
veneris (Gammarus) . . . . » 472 
verrauxii (Gammarus) . =» 2 2.2... 459 
verreauxii (Dikerogammarus) . . 459 
verreauxii (Gammarus) . » » 2... 459 
verrucosus (Echinogammarus) 481 
verrucosus (Gammarus) . » 2... 481 
versiculatus (Coremapus) . - . . 786 
versiculatus (Lembos) . » » ... . . 593 
versiculatus (Mierodentopus) . . . . 5% 
versiculatus (Mierodeuteropus) . . . 593 
versiculatus (Microdeutopus) 593,736 


De, Kat ° 


verticellatus (Allorchestes) . . . » » 566 
vertieillata (Allorchestes) . . . . . 566 
vertieillatus (Allorchestes) . . . . - 566 
RR UN ie ee RR 321 


vietorii (Gammarus godlewskii var.). 510 
vietorii (Polyacanthus godlewskii var.) 734 


Vijaya ......» RIEF EEE 717 
vaillosa (Hiyale) ten RT RE 574 
villosa (Parharpinia) . . .... 147 
villosus (Atylas) .. Sau 334 
villosus (Nototropis) - . . .. . 334 
villosus (Phoxocephalus) . . . . . De 7 
vilbosus: (Phoxüs) .. ur 147 
violaceus (Echinogammarus) . . 492 
violaceus (Gammarus) ». » .».2... 492 
violaceus (Gammarus faseiatus). . . 432 


violaceus_ var. virescens (Gammarus) 492 


virei (Niphargus) . . ... . 408, 731 
virescens (Amphithoe). . .».... 643 
virescens (Gammarus violaceus var.) 492 
virescens (Pleonexes) . . .... 643 
viridis (Dybowskia) ». . 2 2.2.2... 730 
viridis (Echinogammarus).. . . . 484 
viridis (EBlasmopus) . ...... 445 
viridis (Gammarus) . . 0... 484 
NUISTHLDOFR) = 1er u ia eat era 445 
viridis (Pallasea) . » .....% 730 
viridis var. canus (Gammarus) . . . 484 
viridis var. olivaceus (Gammarus) . . 484 
vitreus (Crangonyx). . . .:... 372 
vitreus (Crangonyx) -. » » 2.2... 389. 
vitreus (Stygobromus). . . 2... 372 
vittatus (Eehinogammarus) . . . 491 
vittatus (Gammarus). ». » » 2... 491 
voeringii (Hyperiopsis) . »»... 715 
volutator (Corophium) . . . .. .» 686 
volutator (Oniseus) » . 2.2... 686 
vorax (Paragrubia) . »...... 739 
vöringi (Hyperiopsis) -. ». 2»... 715 
vßsringii (Hyperiopsis). . .». .».. 715 
vortex (Gammarus) . . »....- . 400 
vortex (Mieruropus). -. - » » . . 400 
vulgaris (Iphimedia). ....... 742 


wagii (Carinogammarus) . . 502,734 


Alphabetical Index 785 


wagüi (Ceradoeus). » » 2.2... 
wagii (Ötenacanthus) . » » .... 
wagii (Gammarus) » ».... ee 
wahlii (Atylus) . ». .. 2-2... 


wahlii (Gammarus) © » » 2.2... 
wahlii (Mieruropus) . ». ».».. 
wahlii var. platycercus (Gammarus) . 
walkeri (Atylus) . . ..... x 
walkeri (Syrrhoites). . » »..».. 
warmingi (Hyalella). . . . De 
warpachowskyi PEERETEN 

N 
websteri (Autonoe) -. » » 2... . 
websterii (Lembos) . . » . » dei 
websterii (Mierodentopus) . . » » » 
websterii (Mierodeutopus) ». . » . » 
websteri (Mierodeuteropus) . . . » » 
websteri (Mierodeutopus) . . » . » 
weidemanni (Gammarus) . . .. 


BWEStWoDden ren ee 
Westwoodia . -... ER 
westwoodi nee, Ba Re 
westwoodü (Dryapoides). . ».. . 
Westwoodilla. . ». 2.... RT, 
westwoodi (Maera) . . ».... 
ANOSDFOCHUIBE nennen 
whitei (Cerapus) . » ........ 
whitei (Protomedeia) . ...... 


whitei (Siphonoecetes) . ». ..... 
whitei (Siphonoecetus). . » .... 


whiteleggei (Iphiplateia) . .. - 203 
wilkitskii (Gammarus duebenii var.) . 733 
woodmasoni (Lysianassa) . . . .. 88 


Wyvvillea 2. 42, N ee NT 
Xenocheira . .... N BE 624 
EHRE ea OLE 624 
Benoclon- Zt ea EEE HLE 
Xenodice . . . . ET BEER 699 
xylophaga (öunoris):: 3010. 698 
VE EEE I ER 806 


zamboangae (Ampelisca) . . . . 110 
RTOROHE a ae te ae 


Zaramilla.. . ..... RE: e) 
zebra (Atylus) ..... ee n/..:808 
zebra (Gammarus) . » . . . .. 398,658 
zebra (Ischyrocerus). . » ».... 658 
zebra (Podoeerus) .  : ........%....058 
DER re ie a se a ar 699 


zeylanica (Melita). . . :.. .. »... 733 
zeylanieum (Platophium). ..... 741 
zeylanieus (Eurystheus) . . . . . 738 
zeylanieus (Gammaropsis) . . . . . 738 
zeylanicus (Podocerus) . . . .. 741 
zienkoviezii (Ceradocus) . . . » . . 509 
zienkowiezii (Acanthogammarus) 509, 

734 
zienkowiezii (Ötenacanthus) . . . . 734 
zienkowiezii (Gammarus). . . » » . 509 
zschanti (Anonyz) .. ..* 0... 04.1, 88 
zschauii (Orchomenopsis) . . .» . 85 


Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 50 


Nomenclator generum et subgenerum. 


Acanthechinus Thomas R.R. Stebbing 
in: Rep. Voy. Challenger, v. 29 p. 883. 
1888. Sp.: A. tricarinatus. „üxavda, 
a spine, and &yxivoc, a hedge-hog or 
sea-urchin“. 


Acanthogammarus Thomas R.R. Steb- 
bing in: Tr. Linn. Soc. London, ser. 2 
v. 7 p. 430. 1899 V. Sp.: A. cabanisii, 
A. zienkowiezü, A. godlewskü, A. 
rodoszkowskii, A. armatus, A. para- 
siticus. „alludes to the dentate carinae“. 


Acanthonotosoma/[pro: Acanthonotozoma' 
A. Boeck 1876]. W. S. M. D’Urban 
in: Ann. nat. Hist., ser. 5 v. 6 p. 255. 
1880. 


Acanthonotozoma Axel Boeck, Skand. 
Arkt. Amphip., ©. 2 p. 237. 1876. Sp. 
typ.: Acanthonotus cristatus. „ükavda 
(Torn), vorog (Ryg), oö@ua (Legeme)“. 


Acanthonotus ([Richard] Owen in MS.) 
James Clark Ross in: John Ross, 
App. sec. Voy., nat. Hist. p.90. 1835. 
Sp.: A. cristatus. 


Acanthosoma ([Richard] Owen in MS.) 
James Clark Ross in: John Ross, 
App. sec. Voy., nat. Hist. p. 91. 1835. 
Sp.: A. hystrix. 


Acanthostepheia Axel Boeck in: Forh. 


Selsk. Christian., 1870 p. 163. 1871. 
Sp.: A. malmgreni. 
Acanthostephia [pro: Acanthostepheia 


A. Boeck 1871]. Eduard von Martens 
in: Zool. Rec., v.8 p.190. 1873. 


Acanthozoma pro: Acanthonotozoma A. 
Boeck 1876. Axel Boeck, Skand. 
Arkt. Amphip., %.2 p.229, 712. 1876. 


Acanthozone Axel Boeck in: Forh. 
Selsk. Christian., 1870 p. 184. 1871. 
Sp.: A. cuspidata. 


Aceroides G. O.Sars, Crust. Norway, v.1 
p- 340 t. 120. 1892. Sp.: Aceropsis 
latipes. 


Aceropsis Anton Stuxberg in: Bih. 
Svenska Ak., 0.5 nr. 22 p.63. 1880. 
[nom. nud.] 


Aceropsis pro: Aceroides O. Sars 1892. 
G.O. Sars, Crust. Norway, v.1 t. 120. 
1892. 


Aceros Axel Boeck in: Forh. Skand. 
Naturf., Mede 8 p. 651. 1861. Sp.typ.: 
Oedicerus obtusus. 


Acidostoma William Lilljeborg in: N. 
Acta Soc. Upsal., ser.3 v.&nr. 1 p.18 
(tabell.), 34. 1865. Sp.: A. obesum. 
„From 4kig a point and oröua mouth“. 


Acidostomum pro: Acidostoma W. Lillje- 
borg 1865. Antonio Della Valle in: 
F. Fl. Neapel, ©.20 p.19, 916. 1893. 


Acontiostoma Thomas R. R. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 709. 
1888. Sp. typ.: A. marionis. „from 
akxövrıov, a dart, otöua, a mouth“. 


Actinacanthus 
Stebbing 1888. 
in: Tierreich, v. 21 p. 326. 
„aktic, ray, ükavda, spine“. 


pro: Acanthechinus T. 
T. R. R. Stebbing 
1906 IX. 


Aedicerus [pro: Oediceros Kroyer 1842]. 
William A. Haswell, Cat. Austral. 
Crust., p. 238, 315. 1882. 


Aglaura C. S. Rafinesque, Anal. Nat., 
p-101. 1815. [nom. nud.] 


Alibrotus[Henri] Milne Edwards, Hist. 
nat. Crust., ©. 3 p. 23. 1840. Sp.: A. 
chauseicus. 

Alicella Ed. Chevreux in: Bull. Soe. 


zool. France, v.24 p.154. 1899. Sp.: 
A. gigantea. 


Nomenclator generum et subgenerum 787 


Allorchestes Jacobus D. Dana in: Amer, 
J. Sei., ser. 2 0.8p.186. 1849 VII. — 
Jacobus D. Dana in: P. Amer. Ac., 
v.2 p.205. 1852. Sp.: A. compressa, 
A.verticillata, A.hirtipalma, A.gracilis, 
A. perwviana, A. humilis, A. australis, 
A. brevicornis, A. novi-zealandiae, A. 
intrepida, A. orientalis, ? A. graminea. 


Allorchestina Subgen. J. F. Brandtin: 
Bull. phys.-math. Ac. St.-Petersb., v. 9 
p.141. 185119. Sp.: Orchestia nidro- 
siensis, ?O. perieri. 

Amanonyx (. Spence Bate in: Rep. Brit. 
Ass., Meet. 25 p.58. 1856. Sp.: A. 
guerinianus. [nom. nud.] 


Amaryllis William A. Haswell in: P. 
Linn, Soc. N.S. Wales, v.4 p.253. 1879. 
Sp.: A. macrophthalmus, A. brevicornis. 


Amathia Heinrich Rathke in: Mem. 
pres. Ac. St.-Petersb., v.3 p. 375. 1837. 
Sp.: A.carinata. „nach einer Meer- 
nympfe“. 

Amathilla pro: Amathia H. Rathke 1837. 
C. Spence Bate and J.O. Westwood, 
Brit. sess. Crust., v.1 p.359. 1862 VII1, 


Amathillina G. O.Sars in: Bull. Ac. 
St.-Pötersb., ser.5 v.1 p. 201, 203. 1894. 
Sp. typ.: A. cristata. 


Amathillinella pro: Amathillina G. O. 
Sars 1894. ([O.] Grimm in MS.) G. O. 
Sars in: Bull. Ace. St.-Pötersb., ser. 5 
v.1 p.201. 1894. 


Amathillopsis Camil Heller in: Denk. 
Ak. Wien, v.35 p.35. 1875. Sp.: A. 
spinigera. 


 Ambasia Axel Boeck in: Forh. Selsk. 
Christian., 1870 p. 97. 1871. Sp.: A. 
danielssenii. 

Ampelisca Henrik Kreyer in: Naturh. 
Tidsskr., v.4 p.154. 1842. Sp.: A. 
eschrichtii. „Nomen wmulieris apud 
Plautum in Rudente“, 


Ampelisia [pro: Ampelisca Kreyer 1842]. 
' H.Kreyer in: Voy. Nord, Crust. t. 23 
f. 1. 1846. 


Amphilochoides G. O. Sars, Ürust. 
Norway, v.1 p. 220. 1892. Sp. typ.: 
Amphilochus odontonyx. 


Amphilochus C. Spence Bate & J.O. 
Westwood, Brit. sess. Crust.,. v.1 
p.179. [186211.] Sp.: A. manudens. 


Amphitho& [pro: Ampithöe Leach 1813/14]. 
[Pierre Andrö] Latreille in: Nouv. 
Dict., ed.2 v.1 p.470. 1816. 


Amphithoides Robby Kossmann, Reise 
Roth. Meer., v.21 Malacost. p.135. 1880. 
Sp.: A. longicornis. 

Amphithonotus (A. Costa in:) F. G. 
Hope, Cat. Crost. Ital., p. 45. 1851. 
Sp.: A. marionis, A. panopla, A. cari- 
natus, A. acanthophthalmus, Acantho- 
notus guttatus. 


Amphithopsis Axel Boeck in: Forh. 
Skand. Naäturf., Mode 8 p.661. 1861. Sp.: 
A. bicuspis, A. elegans, A. laeviuscula, 
A.tridentata, A. glaber, A.longicaudata. 


Amphitoe [pro: Ampithöe Leach 1813/14]. 
F. E. Guerin-M£neville, Ieconogr. 
Regne an., v.3 Crust. p.23. 1836. 


Amphitonotus [pro: Amphithonotus A. 
Costa 1851]. Adolph Eduard Grube, 
Ausfl. Triest, p. 136. 1861. 

Amphitopsis [pro: Amphithopsis A. Boeck 
1861]. Julius Vosseler in: Arch. 
Naturg., 0.551 p.156. 1889. 


Ampithöe [William Elford Leach in:] 
Edinb. Ene., v.7 p.403, 432. [1813/14.] 
Sp.: A. rubricata. 

Amplisca [pro: Ampelisca Kroyer 1842]. 

Edouard Chevreux in: Bull. Soe. 
zool. France, v.12 p.574. 1887. 


Anamixis Thomas R.R. Stebbing in:- 
Tr. Linn. Soe. London, ser. 2 v.7 p.35.. 
1897 V. Sp.: A. hanseni. 


Andania Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.128. 1871. Sp.: A. 
abyssi, A. nordlandica. 


Andaniella G.O.Sars, Crust. Norway, v. 1 
p-210. 1891. Sp.: A. pectinata. 


Andaniexis pro: Andania A. Boeck 1871. 
T.R.R.Stebbing in: Tierreich, v.21 
p- 94. 1906 KX. 


Andaniodes [pro: Andaniotes T. Stebbing 
1897]. J. Vietor Carus in: Zool. Anz,, 
Bibliogr. v.2 p.622. 1897 XI 29. 


Andaniopsis G. 0. Sars, Crust. Norway, 
v.1 p.208. 1891. Sp.: A. nordlandica, 


Andaniotes Thomas R. R, Stebbing in; 
Tr. Linn. Soe. London, ser. 2 v.7 p. 50. 
1897 V. Sp.: A. corpulentus. 


Anisopus Robert Templeton in: Tr. ent. 
Soe. London, v.1 p.185. 1836. Sp.: 
A. dubius. 


50* 


788 


Anonyx Henrik Kröyer in: Danske 
Selsk. Afh., v.7 p. 242. 1838. Sp.: A. 
vahlii, A. lagena, A. appendiculosus. „Af 
a priv. og ovuf, Negl“. 

Aora Henrik Kreyer in: Naturh. Tidsskr., 
ser.2 v.1 p.328, 335. 1845. Sp.: A. 
typica. „Navnet paa en Nymfe“. 

Aoroides Alfred O. Walker in: Tr. 
Liverp. biol. Soe., v.12 p.284. 1898. 
Sp.: A. columbiae. 


Apherusa Alfred O.: Walker in: Ann. 
nat. Hist., ser. 60.8 p.83. 1891. [Sp.: 
Pherusa jurinii.] 


Apocrangonyx Thomas R. R. Stebbing 
in: Tr. Linn. Soc. London, ser, 2 v.7 
p.422. 1899 V. Sp. typ.: A. lucifugus. 


Araneops Achille Costa in: Rend. Soe, 
Borbon., n. ser. 0.2 p.169, 171. 1853. 
Sp.: A. diadema, A. brevicornis. 


Argissa Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.125. 1871. Sp.: 
A. typica. 

Aristias Axel Boeck in: Forh. Selsk. 
Christian, 1870 p. 106. 1871. Sp.: 


A. tumidus. 


Arrhis pro: Aceros A. Boeck 1861. T. 
R. R. Stebbing in: Tierreich, v.21 
p. 248. 1906 IX. „Aßpıs, without nose*. 


Asope Ü. S. Rafinesque, Anal. Nat., 


p.101. 1815. [nom. nud.] 

Aspidophoreia William A. Haswell in: 
P. Linn. Soc. N. S. Wales, ».5 p. 101. 
1880. Sp.: A. diemenensis. 


Aspidopleurus G. O. Sars, Crust. Nor- 
way, v.1 p.203. 1891. Sp.: A. gibbosus, 
? Stegocephalus kessleri. 

Astyra Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.133. 1871. Sp.: A. 
abyssi. 

Atyloides Thomas R. R. Stebbing in: 
Rep. Voy.Challenger, v.29 p.913. 1888. 


Sp.: A. australis, A. assimilis, A. serrati- 


cauda. 


Atylopsis Thomas R. R. Stebbing in: 
Rep. Voy. Challenger, v.29 p.924. 1888. 
Sp.: A. magellanicus, A. dentatus, A. 
emarginatus. 

Atylus William Elford Leach, Zool. 
Mise., ©.2 p.21. 1815. Sp.: A. carinatus. 


Audouinia (A. Costa in:) F.G. Hope, 
Cat. Crost. Ital., p.24. 1851. Sp.: A. 
acherusica. [nom. nud.] 


Nomenclator generum et subgenerum 


Audulla Ed. Chevreux in: M&m. Soe. 
zool. France, v.14 p.431. 1901. Sp.: 
A. chelifera. „Anagramme de Alluaud*“. 


Autonoe Ragnar M. Bruzelius in: 
Svenska Ak. Handl., n. ser. &.3 nr.l 
p-23. 1859. Sp.: A. punctata, A. ano- 
mala, A. grandimana, A. erythroph- 
thalma, A. longipes, A. macrony&. „En 
dotter af Nereus och Doris“, 


Axelboeckia pro: Boeckia G. O. Sars 
1894. Thomas R. R. Stebbing in: 
Tr. Linn. Soe. London, ser.2 v.7 p.423. 
1899 V. „in honour of the late Axel 
Boeck“. 


Bactrurus William Perry Hay in: P. U. 
S. Mus., 0.25 p.430. 1902 IX 23. Sp.: 
Crangonyx mucronatus. 


Baikalogammarus Thomas R. R. Steb- 
bing in: Tr. Linn. Soc. London, ser. 2 
v.7 p.425. 1899 V. Sp.typ.: B. pullus. 
„alludes to Lake Baikal“. 


Barentsia Thomas R. R. Stebbing in: 
Bijdr. Dierk., v.17/18 p.25. 1894. Sp.: 
B. hoeki. „Willem Barents“. 


Batea Fritz Müller in: Ann. nat. Hist., 
ser.3 v.15 p.276. 1865. Sp.: B. catha- 
rinensis. 


Bathymedon G.O.Sars, Crust. Norway, 
v.1 p.332. 1892. Sp.: B. longimanus, 
B. saussurei, B. obtusifrons. 


Bathyonyx Fr. Vejdovskyin: SB. Böhm. 
Ges., 1905 nr.28 p.2. 1905. Sp.: B. 
devismesi. r 


Bathyporea [pro: Bathyporeia Lindström 
1856]. ©. Spence Bate in: Ann. nat. 
Hist., ser.2 v.19 p.271. 1857. 


Bathyporeia G. Lindström in: Öfy. Ak. - 
Förh., #.12 p.59. 1855. Sp.: B.pilosa. 


Bellia U. Spence Bate in: Ann. nat. Hist., 
ser.2 v.7 p.318. 1851. Sp.: B.arenaria. 


Biancolina Antonio Della Valle in: F. 
Fl. Neapel, v.20 p.562. 1893. Sp.: B. 
algicola. „in omaggioalsig. S. Lobianco*“. 


Bircenna Charles Chilton in: Tr. N. 
Zealand Inst., v.16 p.264, 265. 1884 V. 
Sp.: B. fulvus (B. fulva). 


Boeckia A..W. Malm in: Öfv. Ak. Förh., 
v.27 p.543. 1871. Sp.: B. typica. 


Boeckia ([0.] Grimm in MS.) G.O. Sars 

in: Bull. Ae. St.-Pötersb., ser. 5 v.1 

p.182. 1894. Sp.: B. spinosa. „the 
name of... Boeck“. 


-Callisoma Oronzio - Gabriele 


a Se eh We ee 
u ’ is 


"Bonnierella Ed. Chevreux in: Rösult. 


Camp. Monaco, v.16 p.97. 1900. Sp.: 
‚B. abyssi. „Jules Bonnier*. 

Boruta L. Wrzesniowski in: Pam. Fi- 
zyjogr., v.8 p.264. 1888. Sp.: B.tene- 
brarum. 

Bosecia [pro: Melita Leach 1813/14]. [Wil- 
liam Elford Leach in:] Edinb. Ene., 
0.7 p.435. [1813/14.] 


Bouvierella Ed. Chevreux in: Rösult. 


Camp. Monaco, v.16 p.70. 1900. Sp. | 
typ.: B.carcinophila. „E.L.Bouvier“, 


Bovallia Georg Pfeffer in: Jahrb. Ham- 
burg. Anst., 0.5 p:95. 1888. Sp.: B. 
gigantea. 

Brachyuropus Thomas R. R. Stebbing 
in: Tr. Linn. Soc. London, ser.2 v.7 
p. 424. 1899 V. Sp.: B. grewingki, 
B. reichertii. „alludes to the shoriness 
of the third uropods“. 

Brandtia C. Spence Bate, Cat.. Amphip. 
Brit. Mus., p. 129. 1862. Sp.: B. la- 
tissima. 

Bruzelia Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.149. 1871. Sp.: B. 
typica. 

Bruzeliella A. M. Norman in: Ann. 


nat. Hist.,. ser.7 v.16 p.83. 1905 VII. 
Sp. typ.: B. falcata. 
Byblis Axel Boeck in: Forh. Selsk. 


Christian.,. 1870 p.228. 1871. Sp.: B. 
gaimardi. 

Callimerus T. R. R.Stebbing in: Ann. 
nat. Hist., ser. 4 v. 18 p. 445. 1876. 
Sp.: ©. acudigitata. 


Calliope (Leach in MS.) ©. Spence Bate 
in: Rep. Brit. Ass., Meet.25 p.58. 1856. 
Sp.: C. leachii. 

Calliopius pro: Calliope Bate 1856. Wil- 
liam Lilljeborg in: N. Acta Soc. Up- 
sal., ser.38 ©.6 nr.1 p.18 (tabella), 19. 
1865. 


Costa, 
Fauna Reg. Napoli, Crost., Cat. p.5. 
[1840.] Sp.: ©. punctata. [nom. nud.] 


Callisoma Achille Costa, Fauna Reg. 
Napoli, fasec. Marz. 1851 p.1. 1851. 
Sp.: ©. punctatum, C. hopei. „xakoc 
pulcher bello, e owua. corpus corpo*. 

Camacho Thomas R. R. Stebbing in: 
Rep. Voy. Challenger, v. 29 p. 1178. 
1888. Sp.: ©. bathyplous. „from a per- 
sonage mentioned in Don Quixote*. 


Nomenclator generum et subgenerum 


789 


Cancer Carolus Linnaeus, Syst. Nat., 
ed.10 p.344, 625. 1758. Sp.: ©. cur- 
sor, C. raninus, C. mutus, ©. minutus, 
C. ruricola, C. vocans, 0. craniolaris, 
C. philargius, ©. rhomboides, C. macu- 
latus, ©. pelagicus, C. nucleus, C. lacta- 
tus, C. maenas, C.depurator, C. feriatus, 
C. granulatus, ©. pagurus, ©. chabrus, 
C. araneus, C. cuphaeus, Ü. muscosus, 
©. personatus, ©. maja, C. longimanus, 
C. horridus, C. eristatus, ©. supereciliosus, 
©. cornutus, C, longipes, ©. spinifer, C. 
eruentatus, C. hepaticus. C. calappa, ©. 
grapsus, ÜO. aeneus, ©. punctatus, C. 
dorsipes, ©. symmysta, Ü. bernhardus, 
©. diogenes, C. gammarus, C. astacus, 
C. careinus, C. pennaceus, Ü. squilla, ©. 
crangon, C. carabus, C. cancharus, (. 
pilosus, C. norvegieus, O. homarus, Ü. 
arctus, C. mantis, C. seyllarus, ©. pulex, 
C. locusta, ©. salinus, C. stagnalis. 


Cardenio Thomas R. R. Stebbing in: 
Rep. Voy. Challenger, v.29 p.806. 1888. 
Sp.: C. paurodactylus. „Ihe generic 
name is taken from a character in Don 
Quixote*. 


Cardenis [pro: Cardenio T. Stebbing 
1888]. Cecil Warburton in: Zool. 
Ree., v.25 Crust. p.18. 1890. 


Cardiophilus G. O. Sars in: Bull. Ac. 
St.-Pötersb., ser.5 v.4 p. 474. 1896. 
Sp.: ©. baeri. 


Caridophilus [pro: Cardiophilus O. Sars 
1896]. J. V. Carus in: Zool. Anz,, 
Regist. 16—20 p.89. 1899. 


Carinogammarus Thomas R. R. Steb- 
bing in: Tr. Linn. Soc. London, ser. 2 
v.7 p.429. 1899 V. Sp.: ©. cinnamo- 
meus, C. wagii, ©. pulchellus, ©. seid- 
litzii. C. rhodophthalmus, C. caspius, 
C. atchensis, ©. subcarinatus, ©. fluvia- 
tilis, ?C. macrophthalmus, ?C. mucro- 
natus. 


Carolobatea Thomas R.R. Stebbing in: 
Ann. nat. Hist., ser.7 v.4 p.208. 1899. 
Sp. typ.: Halimedon schneideri. „in 
recollection of the late Charles Spence 
Bate“. 


Ceina Antonio Della Valle in: F. Fl. 
Neapel, v. 20 p. 530. 1895. Sp.: €. 
egregia. „‚derivato con una leggiera 
trasposizione di lettere dal primitivo 
Nicea“. 


Centromedon G.O.Sars, Crust. Norway, 
v.1 p.99. 1891. Sp. typ.: CO. pumilus 


790 Nomenclator generum et subgenerum 


Ceradocus Achille Costa in: Rend. Soe. | 


Borbon., n. ser. v.2 p.170, 177. 1853. 
Sp.: C. orchestiipes. 


Cerapodina [Henri] Milne Edwards, 
Hist. nat. Crust., v.3 p.62. 1840. Sp.: 
©. abdita. 


Cerapopsis Antonio Della Valle in: 
F. Fl. Neapel, v.20 p. 356, 388. 1893. 
Sp.: (©. longipes. 


Cerapus Thomas Say in: J. Ac. Philad., 
v.1ı p.49. 1817 VIII. Sp.: ©. tubularis. 
„kepog, a horn, and tous, a foot“. 


Chareotia Ed. Chevreux in: Bull. Soc. 
zool. France, v. 30 p. 163. 1906I 31. 
Sp.: ©. obesa. ‚Dr. Chareot‘“. 


Cheirimedon Thomas R. R. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 638. 
1888. Sp.: ©. crenatipalmatus. ,xeip, 
the hand, and uedwv, a lord“*. 


Cheiriphotis Alfred OÖ. Walkerin: Herd- 
man, Rep. Ceylon Pearl Fish., v. 2 
p: 234, 283. 1904. Sp.: C. megacheles. 


Cheirocratus Alfred Merle Norman in: 

. Nat. Hist. Tr. Northumb., ®. 1 p. 12. 

1867. Sp.: CO. mantis. „xeip and xparew, 
strong in the hand“. 


Chelura A. Philippi in: Arch. Naturg., 
v.51 p.120. 1839. Sp.: C. terebrans. 


Chevalia Alfred O. Walker in: Herd- 
man, Rep. Ceylon Pearl Fish., v. 2 
p. 234,288. 1904. Sp.: CO. aviculae. 


Chevreuxius Jules Bonnier in: Ann. 
Univ. Lyon, v. 26 p. 663. 1896. Sp.: 
©. grandimanus. 


Chiltonia Thomas R. R. Stebbing in: 
Tr. Linn. Soc. London, ser.2 ©.7 p.397, 
408. 1899 V. Sp.: C. mihiwaka. „in 
eompliment to Dr. Charles Chilton“. 


Chimaeropsis Fr. Meinert in: Udb. 
Hauchs, v.3 p.167. 1890. Sp.: C.danica. 


Chironesimus G.O.Sars, Crust. Norway, 
v.1 p.108. 1891. Sp.: ©. debruymii. 


Chloris William A. Haswell in: Ann. 
nat. Hist., ser.5 ©.5 p.33. 1880. 


Chosro&s Thomas R. R. Stebbing in: 
Rep. Voy. Challenger, v. 29 p. 1208, 
1888. Sp.: C. ineisus. „An Armenian 
King“. 

Cleippides Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.201. 1871. Sp.: €. 
tricuspis. 


Cleonardo Thomas R. R. Stebbing in: 
Rep. Voy. Challenger, v.29 p.959. 1888. 
Sp.:. ©. longipes, Tritropis appendieu- 
lata. „from a personal name in Don 
Quixote*. 


Colomastix Adolph Eduard Grube, 
Ausfl. Triest, p.125, 137. 1861. Sp.: 
C. pusilla. 


Concholestes G. M. Giles in: J. Asiat. 
Soc. Bengal, v.57 p.237. 1888 X 10. 
Sp.: ©. dentalii. 


Constantia B. N. Dybowsky in: Ho- 
rae Soc. ent. Ross., ®.10 suppl. p. 186. 
1874. Sp.: ©. branickiü, C. b. var. 
alexandri. 


Coremapus A. M. Norman in: Ann. nat. 
Hist., ser. 7 v.16 p.78. 1905 VII. Sp. 
typ.: ©. versiculatus. „xöpnua, a brush, 
and moUc, a foot“. 


Corophia [pro: Corophium Latreille 1806]. 
H.Milne-Edwardsin: Ann. Sei. nat., 
v.20 p.384. 1830. 


Corophium P.A. Latreille, Gen. Crust. 
Ins., v.1 p.58. 1806. Sp.: ©. longicorne. 


Corophrium [pro: Corophium Latreille 
1806]. [William Elford Leach in:] 
Edinb. Ene., v.7 p.432. [1813/14.] 


Costantia [pro: Constantia B. Dybowsky 
1874]. B. N. Dybowsky in: Horae 
Soe. ent. Ross., v.10 suppl. p.50. 1874. 


Crangonyx C. Spence Bate in: P. Dublin 
Univ. zool. bot. Ass., ©.1 p.237. 1859. 
Sp.: C.subterraneus. „kpayyWwv and vbE“. 


Cratippus Ü. Spence Bate, Cat. Amphip. 
Brit. Mus., p.275. 1862. Sp.: ©. tenuipes. 


Cratophium James D. Dana in: Amer. 
J. Sei., ser.2 v.14 p.309. 1852XI. — 
James D. Dana in: U.S. expl. Exp., 
v.1311 p.832, 840. [1853.] Sp.: ©. vali- 
dum, ©. orientale. 


Cressa Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.145. 1871. Sp.: ©. 
schigdtei, ©. minuta. 


Ctenacanthus W. Garjajeff in: Trudui 
Kazan. Univ., 0.35 nr.6 p.15. 1901. 
Sp.: ©. ruber, C. roseus, ©. carpenterii, 
C. wagiüi, CO. cabanisi, C. ziehkowiezüi, 
C. radoszkowskii. 

Cuvieria [pro: Leucothöe Leach 1813/14]. 
[William Elford Leach in:] Edinb. Enc., 
v.7 p.435. [1813/14.] 


Cychreus ©.S. Rafinesque, Anal. Nat., 
p-101. 1815. [nom. nud.] : 


Cyclocaris Thomas R. R. Stebbing in: 
Rep. Voy. Challenger, v.29 p.664. 1888. 
Sp.: ©. tahitensis. „from xUxkog, a cirele, 
and xdpa, head“. 


Cymadusa [Subgen.?] Jules-Cesar Sa- 
vigny, M&m. An.s. Vert., v.1 p.109. 
1816I. Sp.: C. filosa. 


Cymothoa Joh. Christ. Fabrieius, Ent. 
syst., 0.2 p.503. 1793. Sp.: C. para- 
doxa, C. imbricata, C. falcata, U. asilus, 
Ü. guadeloupensis, Ü. oestrum, (©. ento- 
mon, O. aquatica, C.marinus, CO. linearis, 
C. chelipes, ©. bicaudata, C. scopulorum, 
C. americana, C. psora, C. physodes, ©. 
spinosa, (©. acuminata, ©. emarginata, 
©, albicornis, C. ceti, C. oceanica, Ü. 
serrata, Ü. assimilis. 


Cyphocaris (Lütken in MS.) Axel Boeck 
in: Forh. Selsk. Christian., 1870 p. 103. 
1871. Sp.: ©. anonys. 


Cypridoidea pro: Cyproidea Haswell 
[1880]. Edward CUaldwell Rye in: 
Zool. Ree., v.16 Index p.4. 1881. 


Cyproidea [pro: Cyproidia Haswell 1879]. 
William A. Haswell in: Ann. nat. 
Hist., ser.5 v.5 p.31. 1880. 


Cyproidia William A. Haswell in: P. 
Linn. Soe. N. S. Wales, v.4 p.820. 1879. 
Sp.: ©. ornata, C. lineata. 


Cyrtophium James D. Dana in: Amer. 
J. Sci., ser.2 v.14 p.309. 1852XI. — 
James D. Dana in: U.S. expl. Exp., 
v.131 p.831, 839. [1853]. Sp.: ©. 
orientale. 


Danaia Ü. Spence Bate in: Ann. nat. 
Hist., ser.2 v.19 p.137. 1857. Sp.: 
D. dubia. 


Darwinea Ü. Spence Bate in: Rep. Brit. 
Ass., Meet. 25 p.58. 1856. Sp.: D. 
compressus. [nom. nud.] 


Darwinia [pro:. Darwinea Bate 1856]. 
0. Spence Bate in: Ann. nat. Hist., 
ser.2 v.19 p.141. 1857. Sp.: D. com- 
pressa. 


Dautzenbergia Ed. Chevreux in: Rösult. 
Camp. Monaco, v.16 p.73. 1900. Sp.: 
D. grandimana. „Dautzenberg“. 


Dereothoe James D. Dana in: Amer. 
J. Sci., ser.2 v.14 p.313. 1852XI. — 
James D. Dana in: U.S. expl. Exp., 


Nomenclator generum et subgenerum 791 


v.131 p.911, 968. [1853.] Sp.: D. 
emissitius, D. speculans, ?D. hirsuti- 
cornis. „depkw, to look“. 


Dermophilus Edouard van Beneden 
& Emile Bessels in: Möm. eour. Ac. 
Belgique, v.34 nr.4 p.26. 1870. Sp.: 
D. lophii. 


Desmophilus [pro: Dermophilus E. 
Beneden & Bessels 1870]. Thomas 
H. Huxley, Man. Anat. Invert., 
p- 367. 1877. 


Dexamene pro: Dexamine Leach 1813/14. 
L. Agassiz, Nomenel. zool., Index 
p.121. 1846. 


Dexamine [William Elford] Leach in: 
Edinb. Ene., 2.7 p.432. [1813/14.] Sp.: 
D. spinosa. 


Dexiocerella William A. Haswell in: 
P. Linn. Soc. N. S. Wales, v.10 p. 107. 
1885 VI. Sp.: D. dentata, D. lobata, 
D. laevis. 


Dikerogammarus ThomasR.R.Stebbing 
in: Tr. Linn. Soc. London, ser.2 v.7 
p.428. 1899 V. Sp.: D. macrocephalus, 
D. haemobaphes, D. grimmi, D. ver- 
reausxii, D. fasciatus. „alludes to the 
two horn-like elevations on the pleon“. 


Dinoa C. S. Rafinesque, Anal. Nat., 
p.101. 1815. [nom. nud.] 


Driope [pro:.Dryope Bate 1862]. C. Spence 
Bate, Cat. Amphip. Brit. Mus., t. 47. 
1862. 


Dryapoides [pro: Dryopoides T. Stebbing 
1888]. Cecil Warburton in: Zool. 
Ree., v.25 Crust. p.19. 1890. 


Dryope C. Spence Bate, Cat. Amphip. 
Brit. Mus., p.276. 1862. Sp.: D. irro- 
rata, D. crenatipalma. 


Dryopoides Thomas R. R. Stebbing in: 
Rep. Voy. Challenger, v. 29 p. 1145. 
. 1888. Sp.: D. westwoodi. „Dryope ... 


and eidog, likeness*. 


Dulichia Henrik Kroyer in: Naturh. 
Tidsskr., ser.2 v.1 p.512, 521. 1845. 
Sp.: D. spinosissima. „doArgog (lang)“. 


Dybowskia W. Garjajeff in: Trudui 
Kazan. Univ., v.35 nr.6 p.16. 1901. 
Sp. & Subsp.: D.viridis, D. dryshenkii, 
D. meyerü, D. armata, D. a. var. 
ongureni, D. grubi, D. kessleriü; .D. k. 
var. europeus, D.brandti, D. cancellus, 
D. c. var. gerstfeldtii, D. cancelloides. 


792 


Dyopedos C. Spence Bate in: Ann. nat. 
Hist., ser. 2 v. 19 p. 150. 1857. Sp.: 
D. porrectus, D. falcatus. 


Echinogammarus Thomas R. R. Steb- 
bing in: Tr. Linn. Soc. London, ser. 2 
v.7 p.428. 1899 V. Sp.: E. berilloni, 
E.verrucosus, E.maackii, E.ochotensis, 
E. saphirinus, E. czerskü, E. lividus, 
E. viridis, E. eyaneus, E. testaceus, 
E sophiae, E. fuscus, E. murinus, E. 
aheneus, E. sarmatus, E. capreolus, E. 
uzzolzewiüi, E. stenophthalmus, E. scha- 
manensis, E. leptocerus, E. toxophthal- 
mus, E. vittatus, E. petersiü, E. viola- 
ceus, E.ibex, E.parvexii, E.polyarthrus, 
?Gammarus mutilus. „alludes to the 
numerous spines on the body“. 


Egidia Achille Costa in: Rend. Soc. 
Borbon., n. ser. v.2 p.170, 172. 1853. 
Sp.: E. pulchella. 


Eiscladus C. Spence Bate & J.O. West- 
wood, Brit. sess. Crust., v. 1 p. 411. 
[1862 XI 1.] Sp.: E. longicaudatus. 
„Eis one, KxAadog branch“. 


Elasmopus Achille Costa in: Rend. Soe. 
Borbon., n.ser. v.2 p.170, 175. 1858. 
Sp.: E. rapax. 


Enone A.Risso, Hist. nat. Eur. mörid., 
v.5 p. 96. 1826. Sp.: E. punctata. 


Ephipphora [pro: Ephippiphora White 
1847]. J. D. Dana in: Amer. J. Sei., 
ser.2 v.8 p.428. 1849 XI. 


Ephippiphora Adam White in: P. zool. 
Soe. London, v.15 p.124. 1847 [XI 
10]. Sp.: E. kroyeri. 

Epidesura Axel Boeck in: Forh. Skand. 
Naturf., Mode8 p.659. 1861. Sp. typ.: 
Amphithoe compressa. 


Epimeria (A. Costa in:) F. G. Hope, 
Cat. Crost. Ital., p.46. 1851. Sp.: E. 
trieristata. 


Eratea C. S. Rafinesque, Anal. Nat., 
p-101. 1815. [nom. nud.] 


Erichthonius [pro: Eriethonius H. Milne 
Edwards 1830]. Hermann Burmeister, 
Handb. Naturg., p. 569. 1837. 


Erichtonius [pro: Eriethonius H. Milne 
Edwards 1830]. [Hippolyte] Lucas 
in: Hist. An. artie., Crust. Arach. Myr. 
p. 231. 1840. ! 


ErietHonius H. Milne Edwards in: 
Ann. Sei. nat., v.20 p.382. 1830. Sp.: 
E. difformis. 


Nomenelator generum et subgenerum 


Eriopis Ragnar M. Bruzeliusin: Svenska 


Ak. Handl., n. ser. 0.3 nr. 1 p.37, 64. 


1859. Sp.: E. elongata. „En dotter af 
Jason och Medea“, 


Eriopisa pro: Eriopis R.M. Bruzelius 1859. 
Thomas R, R. Stebbing in: Ann. nat. 
Hist., ser. 6 v.5 p.193. 1890. 


Eriopsis pro: Eriopis R.M. Bruzelius 1859. 
August Wrzesniowski in: Z. wiss. 
Z00l., v.50 p. 632. 1890 X 10. 


Euandania Thomas R. R. Stebbing in: 
Ann. nat. Hist., ser.7 v.4 p. 206. 1899. 
Sp. typ.: Andania gigantea. 


Euerangonyx Thomas R.R.Stebbing 
in: Tr. Linn. Soe. London, ser. 2 0.7 
p. 423. 1899 V. Sp.: E. mucronatus, 
E. vejdovskyi, E. packardü, E. gracilis, 
E. antennatus. 


Euonyx Alfred Merle Norman in: Rep. 
Brit. Ass., Meet. 36 p.197, 202. 1867. 
Sp.: E. chelatus, 


Eurymera Georg Pfeffer in: Jahrb. 
Hamburg. Anst., 0.5 p.102. 1888. Sp.: 
E. monticulosa. 


Euryporeia pro: Eurytenes W. Lilljeborg 
1865. G.O. Sars, Crust. Norway, v.1 
p. 85. 1891. 


Eurystheus C. Spence Bate in: 
Brit. Ass., Meet. 25 p. 58. 
E. tridentatus. [nom. nud.] 


Rep. 
1856. Sp.: 


Eurystheus (©. Spence Bate in: Ann. nat. 
Hist., ser.2 v.19 p.148. 1857. Sp.: 
E. tridentatus. 


Eurytenes William Lilljeborg in: N. 
Acta Soc. Upsal., ser.3 ©.6 nr.1 p.11. 
1865. Sp.: E. magellanicus. „elputevng, 
which signifies widely stretched“. 


Eurythenes [pro: Eurytenes W.Lilljeborg 
1865]. (S. I. Smith in:) Samuel H. 
Scudder, Nomencel. zool., suppl. L. 
p- 1385. 1882. 


Eurytheus [pro: Eurystheus Bate 1857]. 
Augustus de Marschall, Nomenel. 
zool., p.409. 1873. 


Eusinus [pro: Eusirus Kroyer 1845]. 
Augustus de Marschall, Nomenel. 
zool., p.409. 1873. 


Eusirogenes T. R. R. Stebbing in: Tr. 
Linn. Soe. London, ser.2 v.10ı p.13, 
15. 1904 XI. Sp.: E. dolichocarpus. 


T 


en 


Yard 


re re ey ein 


u a 


ne 2” L 
r EUR 


Nomencelator generum et subgenerum 


Eusiroides Thomas R.R. Stebbing in: 
Rep. Voy. Challenger, v. 29 p. 969. 1888. 
p-: E. caesaris, E. pompeüi, E. crassi, 

? Atylus monoculoides, ? A. lippus. 


Eusiropsis Thomas R. R. Stebbing in: 
Tr. Linn. Soc. London. ser. 2 v.7 p. 39. 
1897 V. Sp.: E. riisei. 


Eusirus Henrik Kreyer in: Naturh. 
Tidsskr., ser.2 v.1 p.501, 511. 1845. 
Sp.: E. cuspidatus. „Euoeipog, en Sen 
af Poseidon og Okeaniden Idothea“. 


Exoediceros Thomas R. R. Stebbing 
in: Ann. nat. Hist., ser. 7 v.4*p. 208. 
1899. Sp. typ.: Oedicerus fossor. 


Exunguia (Alfred Merle Norman in:) 
George Stewardson Brady & David 
Robertson in: Ann. nat. Hist., ser 
4 v.3 p.859. 1869. Sp.: E. stilipes. 
„ex and unguis, without a nail“. 


Galanthis Ü©. Spence Bate in: Rep. Brit. 
Ass., Meet. 25 p.57. 1856. Sp.: @. 
lubbockiana. 


Gallea Alfred O. Walker in: Herdman, 
Rep. Ceylon Pearl Fish., v. 2 p.232, 
256. 1904. Sp.: @. teeticauda. „From 
the port of Galle“. 


Gammaracanthus C. Spence Bate, Cat. 
Amphip. Brit. Mus., p.201. 1862. Sp.: 
@. loricatus, G. mueronatus, G. ma- 
crophthalmus. 


Gammarella ©. Spence Bate in: Ann. 
nat. Hist., ser. 2 v. 19 p.143. 1857. 
Sp.: @. orchestiformis. 


Gammarellus [Subgen.] Johann Friedrich 
Wilhelm Herbst, Naturg. Krabben 
Krebse, v.2 p.106. 1795. Sp.: Cancer 
(@.) setiferus, C©. (G.) chinensis, C. (@.) 
pedatus, ©. (G.) armiger, ©. (G.) ocula- 
tus, C. (@.) bipes, C. (@.) trixapus, C. 
(@.) homari, C. (G.) harangum, (. 
flexuosus, ©. (G.) ampulla, C. (@.) nu- 
gax, C©.(@.) paludosus, ©. (G.) podurus, 
©. (@.) mutilus, ©. (@.) stagnalis, CO. 
(@.) grossipes, ©. (@.) cancellus, 0. (@.) 
locusta, ©. gammarellus, C. (G.) pulex, 
C. (@.) arenarius, C. (@.) crassicornis, 
©. (@.) strömianus, (©. (@.) spinicarpus, 
©. (G@.) sedentarius, ©. (G.) eicada, ©. 
(@.) serratus, ©. (G.) medusarum, ©. 
(@.) eorniger, ©. (G.) abyssinus, C. (6) 
. linearis, ©. (G.) ventricosus. 


r% 


793 


Gammaropsis [Subgen.] V. [Wilhelm] 
Liljeborg in: Vetensk. Ak. Handl., 
1853 p. 455. 1855. Sp.: Gammarus 
erythrophthalmus, @. anomalus, @.lon- 
gipes, G@. macrony«. 


Gammarus Io. Christ. Fabrieius, Syst. 
Ent., p. 418. 1775. Sp.: @. locusta, 
@G. pulex, @. linearis, G. salinus, @. 
stagnalis. 


Forh. Selsk. 
Sp.: @. 


Gitana Axel Boeck in: 
Christian., 1870 p.132. 1871. 
sarsi, @. rostrata. 


Gitanopsis G. O. Sars, Crust. Norway, 
v.1 p.223. 1892. Sp.: @. bispinosa, 
@G. inermis, @. arctica. 


Glauconome Henrik Kreyerin: Naturh. 
Tidsskr., ser.2 v.1 p.491, 501. 1845. 
Sp.: G. leucopis. „En af Nereiderne“. 


Glycera William A. Haswell in: P. Linn. 
Soc. N.S.Wales, v.4 p.256, 322. 1879. 
Sp.: @. tenwicornis. 


Glycerina William A. Haswell, Cat. 
Austral. Crust., p.233. 1882. Sp.: @. 
tenuicornis. „Altered from Glycera*. 


Gmelina ([O.| Grimm in MS.) G. ©. 
Sars in: Bull. Ace. St.-Pötersb., ser. 5 
v.1 p.191. 1894. Sp.: @. costata, @. 
kusnezowi. 


Gmelinopsis G. 0. Sars in: Bull. Ace. St.- 
Pötersb., ser.5 v.4 p.434. 1896. Sp.: 
@. tuberculata, @. aurita. 


Goesia Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.231. 1871. Sp.: @. 
depressa. 


Goplana [August] Wrzesniowski in: 
Zool. Anz., v.2 p.299. 1879 V19. Sp.: 
@. polonica, @. ambulans. „In pol- 
nischer Sprache bezeichnet Goplana 
eine Wasser-Nympbe“. 


Gossea Ü. Spence Bate (& J. O. West- 
wood), Brit. sess. Orust., v. 1 p. 276. 


[1862 IV 1.] Sp.: @. mierodentopa. „in 
compliment to Mr. Gosse“. 
Grandidierella H. Couti®re in: Bull. 


Soe. philom., ser. 9 v. 6 p. 166. 1904. 
Sp.: @. mahafalensis. 


Graya [pro: Grayia Bate 1862]. C. Spence 
Bate, Cat. Amphip. Brit. Mus., t. 14a, 
16. 1862. 


794 


Grayia Ü. Spence Bate (& J. O. West- 
wood), Brit. sess. Crust., v.1 p.15l. 
[1862 I 1.] Sp.: @. imbricata. „in 
compliment to Dr. J. E. Gray“. 


Grimaldia Ed. Chevreux in: Bull. Soe. 
zool. France, v.14 p.283. 1889, Sp.: 
G. armata. „Grimaldi“. 


Grubia Voldemarus Czerniavski in: 
Syezda Russ. Est., Syezdal Zool. p. 103. 
1868. Sp.: @. taurica. „Dedicata cel. 
A. E. Grubio“. 


Guerina pro: Guerinia A. Costa 1853, 
Antonio Della Valle in: F. Fl. Neapel, 
v.20 p.775. 1893. 


Guerinella pro: Guerinia A. Costa 1853. 
Ed. Chevreuxin: Bull. Mus. Monaco, 
nr.85 p.[7]. 1905 V 5. 


Guerinia (Hopein MS.) Achille Costa, 
Deser. 3 Crost. dal Hope, p. 3. 1853. 
Sp.: @. nicaeensis. 


Helleria A. M. Norman 
Bull. 
1887. 


Guernea pro: 
1868. Edouard Chevreux in: 
Soc. zool. France, v.12 p. 302. 
„Jules de Guerne‘. 


Gulbarentsia pro: Barentsia T. Stebbing 
1894. Thomas R. R. Stebbing in: 
Bijdr. Dierk., v.17/18 p.2. 1894. 


Hakonboeckia Thomas R. R. Stebbing 
in: Tr. Linn. Soe. London, ser.2 v.7 
p.425. 1899 V. Sp.typ.: H. strauchü. 
„in eompliment to Hakon Boeck“. 


Halibrotus pro: Alibrotus H. Milne Ed- 
wards 1840. L. Agassiz, Nomenel. 
zool., Index p. 14,171. 1846. 


Halice Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.152. 1871. Sp.: H. 
abyssi, H. grandicornis. 


Halicoides Alfred O. Walker in: Ann. 
nat. Hist., ser. 6 v. 17 p. 344. 1896. 
Sp.: H. anomala. 


Halicreion Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.173. 1871. Sp.: H. 
longicaudatus. 


Halierion[pro: Halicreion A. Boeck 1871]. 
Eduard von Martens in: Zool. Reec., 
v.8 p.190. 1873. 


Halimedon Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.169. 1871. Sp.: H. 
molleri, H. saussurei, H. longimanus, 
H. brevicalcar. 


Nomenclator generum et subgenerum 


Halirages Axel Boeck in: Forh. Selsk, 
Christian., 1870 p.194. 1871. Sp.: H. 
bispinosus, H. borealis, H. tridentatus, 
H. fulvoeinetus. 


Haliragoides G. O. Sars, Crust. Norway, 
v.1 p.432. 1893. Sp.: H. inermis. 


Halirhages[pro: Halirages A. Boeck 1871]. 
Anton Stuxberg in: Bih. Svenska Ak., 
v.5 nr.22 p.64. 1880. 


Haplocheira William A. Haswell in: 
P. Linn. Soe. N.S. Wales, v. 4 p. 273. 
1879. Sp.: H. typica. 


Haplochira pro: Haplocheira Haswell 
1879. Eduard von Martens in: Zool. 
Ree., v.16 Crust. p.32. 1881. 


Haplonyx [pro: Hoplonyx O. Sars 1891]. 
[Alfred Merle] Norman in: Ann. nat. 
Hist., ser.7 v.5 p.209, 211,212. 1900 IL 


Haploops [William] Liljeborg in: Öfv. 
Ak. Förh., v.12 p.135. 1855. Sp.: H. 
tubicola, H. carinata. 


Harmomia [pro: Harmonia Haswell 1879]. 
William A. Haswell in: P. Linn. Soe. 
N.S. Wales, v.4 p. 330. 1879. 


Harmonia William A. Haswell in: P. 
Linn. Soc. N.S.Wales, v.4 p.330, 349. 
1879. Sp.: Harmomia crassipes (Har- 
monia c.). 


Harpina Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.135. 1871. Sp.: H. 
plumosa, H. crenulata. 


Harpinia pro: Harpina A. Boeck 1871. 
Axel Boeck, Skand. Arkt. Amphip., 
v.2 p.218. 1876. „Apmwvıa (et graesk 
Kvindenavn)“. 


Harpinioides Thomas R. R. Stebbing 
in: Rep. Voy. Challenger, v. 29 p. 936. 
1888. Sp.: H. drepanocheir. „Har- 
pinia, Boeck, and eidog, likeness“. 


Harpinoides [pro: Harpinioides T. Steb- 
bing 1888]. Ceeil Warburton in: Zool. 
Ree., 0.25 Crust. p.19. 1890. 


Haustorius P. 1. St. Müller in: Slabber, 
Phys. Belustig., p.48. 1775. Sp.: H. 
arenarius. 


Heiscladius [pro: Eiscladus Bate & West- 
wood 1862]. W.C.M’Intosh in: Ann. 
nat. Hist., ser.4 v.14 p.269. 1874. 


Heiscladus [pro: Eiscladus Bate & West- 
wood 1862]. Alfred Merle Norman in: 
Rep. Brit. Ass., Meet. 38 p.255, 259, 284. 
1869. 


Nomenelator generum et subgenerum 795 


Hela Axel Boeck in: Forh. Skand. Naturf., 
Mode8 p.668. 1861. Sp.: H.monstrosa. 


Helella[pro: Hela A.Boeck 1861]. (Smith 
in MS.) G. O. Sars in: Forh. Selsk. 
Christian., 1882 nr. 18 p.31. 1882. 


Helleria Alfred Merle Norman in: Ann. 
nat. Hist., ser.4v.2 p.418. 1868. Sp.: 
H. coalita. „dedicated to Prof. Heller“. 


Heterogammarus Thomas R. R. Steb- 
bing in: Tr. Linn. Soc. London, ser. 2 
v.7 p.429. 1899V. Sp.: H. stanislavii, 
H. sophianosü, H.capellus, H.ignotus, 
H. flori, H. bifasciatus, H. branchialis, 
H. albulus. „alludes to the character 
of the genus as a second self to Gam- 
marus“. 


Hippias C.S. Rafinesque, Anal. Nat., 
p. 101. 1815. [nom. nud.] 


Hippomedon Axel Boeckin: Forh. Selsk. 
Christian., 1870 p.102. 1871. Sp.: H. 
holbglli, H. abyssi. 


Hirondella [pro: Hirondelles« Chevreux 
1889]. J. V. Carus in: Zool. Anz., 
Regist. 11—15 p.142. 1893. 


Hirondellea Ed. Chevreux in: Bull. 
Soc. zool. France, v. 14 p. 285. 1889. 
Sp.: H. trioculata. „Hirondelle“. 


Hoplonyx G. O. Sars, Crust. Norway, 
v.1 p.91. 1891. Sp.: Anonyx cicadoides, 
Hoplonyx eicada, H.similis, H.acutus, 
H. albidus, H. leucophthalmus, H. cae- 
eulus. 


Hornellia Alfred O. Walker in: Herd- 
man, Rep. Ceylon Pearl Fish., v.2 p.233, 
268. 1904. Sp.: H.incerta. „after Mr. 
Jas. Hornell“. 


Hyale Heinrich Rathke in: Mem. pres. 
Ac. St.-Pötersb., v.3 p.377. 1837. Sp.: 
H. pontica. „nach. einer Nympfe aus 
dem Gefolge der Diana“. 


Hyalella Sidney I. Smith in: Rep. U. 
S. Fish Comm., v.2 p.645. 1874. Sp.: 
H. dentata. 


Hyalellopsis Thomas R. R. Stebbing in: 
Tr. Linn. Soe. London, ser.2 v.7 p.422. 
1899V. Sp. typ.: H. czyrnianski. 

Hyperiopsis G.O.Sars in: Norske Nord- 
havs-Exp., v.6 Crust.1p.231. 1885. Sp.: 
H. voringü. 

Ichnopus Achille Costa in: Rend. Soc. 
Borbon., n. ser. v.2 p.169, 172. 1853. 
Sp.: I. taurus. 


N 


Ichthyomyzocus [C. E.] Hesse in: Ann. 
Sei. nat., ser.5 v.17 nr.7 p.1,5. 1873. 
Sp.: I. ornatus, I. morrhuae, I. lophii, 
I. squatinae. „De ix%05, poisson ; ulZw, 
je suce*. 


Icilius James D. Dana in: Amer. J. Sei., 
ser.2 v.8p.140. 1849 VII. — Jacobus 
D. Dana in: P. Amer. Ae., v.2 p.220. 
1852. Sp.: I. ovalis. 


Icridium [Adolph Eduard] Grube in: 
Jahresber. Schles. Ges., v.41 p.58. 1864. 
Sp.: I. fuscum. 


Iduna AxelBoeck in: Forh. Skand. Naturf., 
Mode 8 p.656. 1861. Sp.: Gammarus 
brevicornis, G. fissicornis (Iduna f.). 


Idunella G. O. Sars, Crust. Norway, v.1 
p.536. 1894. Sp.: I. aegvicornis. 


Idurella [pro: Idunella O. Sars 1894]. 
R.I.Pocoekin: Zool. Rec., v.32 Urust. 
p.41. 1896. 


Ingolfiella H. J. Hansen in: J. Linn. 
Soc., v.29 p.118, 128. 1908 X.91, Sp.: 
3: abyssi, I. littoralis. 


Iphigeneia pro: Iphigenella G. O. Sars 
1896. ([O.] Grimm in MS.) G.O. Sars 
in: Bull. Ac. St.-Petersb., ser.5 ®. 4 
p-478. 1896 V. 


Iphigenella G. O. Sars in: Bull. Ac. St.- 
Petersb., ser.5 v.4 p.478. 1896 V. Sp. 
typ.: I. acanthopoda. 


Iphigenia George M. Thomson in: Tr. 
N. Zealand Inst., v.14 p.237. 1882V. 
Sp.: I. typica. 


Iphimedia Heinrich Rathke in: N. Acta 
Ace. Leop., v. 201 p.85. 1843. Sp.: 
I. obesa. „Nach einer Geliebten Nep- 
tuns*. 


Iphimediopsis Antonio Della Valle in: 
F. Fl. Neapel, v.20 p.585, 933. 1893. 
Sp.: I. eblanae (I. geniculata). 


Iphinotus Thomas R. R. Stebbing in: 
Tr. Linn. Soc. London, ser.2 v.7 p.414, 
419. 1899 V. -Sp.: I. chiltoni. „from 
the prefix ipı-, and vortog, back“. 


Iphiplateia Thomas R. R. Stebbing in: 
Tr. Linn. Soe. London, ser.2 v.7 p.414. 
1899 V, Sp.: I. whiteleggei. „from the 
prefix ipı-, signifying strength, and rAo-, 
teia, broad“. 


Isaea H. Milne Edwards in: Ann. Sei. 
nat., v.20 p.380. 1830. Sp.: I.montagui. 


796 


Ischyroceras [pro: Ischyrocerus Kröyer 
1838]. James D. Dana in: Amer. J. Sei., 
ser.2 0.8 p.138. 1849 VII. 


Ischyrocerus Henrik Kröyer in: Danske 
Selsk. Afh., v.7 p.283, 287. 1838. Sp.: 
I. angvipes. „Af ıoxupog, staerk, og 
xepac, Horn“. 


Iscoea [pro: Isaea H.Milne Edwards 1830]. 
C. Spence Bate, Cat. Amphip, Brit. 
Mus., t.22 f.1. 1862. 


Isoea |pro: Isaea H. Milne Edwards 1850]. 
[Hippolyte] Lucas in: Hist. An. artie., 
Crust. Arach. Myr. p.230. 1840. 


Isolus C. S. Rafinesque, Anal. Nat., 
p.101. 1815. [nom. nud.] 


Janassa Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.249. 1871. Sp.: J. 
variegata. 

Jassa [William Elford] Leach in: Edinb. 
Ene., ©.7 p.433. [1813/14]. Sp.: J. 
pulchella, J. pelagica, ? Cancer (Gam- 
marus) falcatus. 


Katius Ed. Chevreux in: Bull. Mus. 
Monaco, nr. 35 p.1. 1905V 5. Sp.: 
K. obesus. „mot arabe Kat, chat“. 


Kerguelenia Thomas R. R. Stebbing 
in: Rep. Voy. Challenger, v.29 p.1219. 
1888. Sp.: K. compacta. 


Kroyea [pro: Kröyera Bate 1857]. ©. 
Spence Bate, Cat. Amphip. Brit. Mus., 
t. 17. 1862. 


Kröyera Ü. Spence Bate in: Ann. nat. 
Hist., ser.2 v.19 p.140. 1857. Sp.: 
K. carinata. 


Kroyeria|pro: Kröyera Bate 1857]. Adolph 
Eduard Grube, Lussin, p. 72. 1864. 


Kuria A. O. Walker & Andrew Seott 
in: H. O. Forbes, Nat. Hist. Sokotra, 
p- 217, 228. 1903. Sp.: K. longimanus. 


Lada [August] Wrzesniowski in: Zool. 
Anz., v.2 p.322. 1879 V123. Sp.: L. 
chalubihskiü. „in der slavischen Mytho- 
logie die Liebesgöttin“. 


Laematophilus [pro: Laetmatophilus R. 
M, Bruzelius1859]. William A.Haswell 
in: P. Linn. Soc. N.S.Wales, v.10 p. 107, 
110. 1885. 

Laetmatophilus Ragnar M. Bruzelius 
in: Svenska Ak. Handl., n. ser. v.3 nr.1 


p. 10. [1859.] Sp.: L. tuberculatus. 
„Adituo och @PiXkoc“. 


Nomencelator generum et subgenerum 


Laetmophilus [pro: Laetmatophilus R. 
M. Bruzelius 1859]. Augustus de Mar- 
schall, Nomenel. zool., p.411. 1873. 


Lafystius Henrik Kreyer in: Naturh. 
Tidsskr., v.4 p.156. 1842. Sp.: L. 
sturionis. „Napuouog, gulosus“. 


Lalaria [Hereule Nicolet in:] Gay, Hist. 
Chile, v.3 p.240. 1849. Sp.: L. longi- 
tarsis. 


Lalasia [pro: Lalaria H. Nicolet 1849]. 
C. Spence Bate in: Ann. nat. Hist., 
ser.2 v.20 p.525. 1857. 


Lampra Axel Boeek in: Forh. Selsk. 
Christian., 1870 p.188. 1871. Sp.: L. 
gibbosa. 


Laotho& pro: Laothoes A. Boeck 1871. 
G.O.Sars, Crust. Norway, v.1 p. 453. 
1893. 


Laothoös Axel Boeck in: Forh. Selsk. 
Christian., 1870 p. 202. 1871. Sp.: L. 
meinerti. 


Laphystiopsis G.O.Sars, Urust. Norway, 
v.1 p.386. 1893. Sp.: L. planifrons. 


Laphystius pro: Lafystius Kroyer 1842. 
L. Agassiz, Nomenel. zool., Index 
p- 200, 202. 1846. 


Leipsuropus Thomas R. R. Stebbing 
in: Ann. nat. Hist., ser. 7 e.3 p.241. 
1899. Sp.: Cyrtophium parasiticum. 
„signifying an omission of a uropod“. 


Lemboides Thomas R. R. Stebbing in: 
Ann. nat. Hist., ser. 6 v.16 p.209. 1895. 
Sp.: L. afer. 


Lembos (. Spence Bate in: Rep. Brit. 
Ass., Meet. 25 p. 58. 1856. Sp.: L. cam- 
briensis, L. damnoniensis, L. versi- 
culatus, L. websterii. |nom. nud.?] 


Lembos (C. Spence Bate in: Ann. nat. 
Hist., ser. 2 0.19 p.142. 1857. Sp.: 
L. cambriensis, L. versiculatus, L. web- 
sterii, L. damnoniensis. 


Lepidaetylis Thomas Say in: J.Ae. 
Philad., v.lır p.379. 1818. Sp.: L 
dytiscus. z 

Lepidaetylus|pro: Lepidaetylis Say 1818]. 
Fr. Meinert in: Udb. Hauchs, ®. 3 
p. 160. 1890. 

Lepidepecreum (. Spence Bate & J. 
O0. Westwood, Brit. sess. Crust., ©.2 
p-. 509. 1868 [XII 31]. Sp.: Z. cari- 
natum, Anonys longicornis. 


Nomenelator generum et subgenerum 


Lepleurus C.S.Rafinesque, Ann. Nat., 
p-6. 1820. Sp.: L. rivularis. 


Leptamphopus G.O.Sars, Crust. Norway, 
v.1p. 458. 1893. Sp.: L. longimanus. 


Leptocheirus Ernestus Gustavus Zad- 
dach, Syn. Crust. Pruss., p.7. 1844. 
Sp.: L. pilosus. 

Leptochela Axel Boeck, Skand. Arkt. 
Amphip., v.2 p.190. 1876. Sp.: Opis 
leptochela. 

Leptochirus [pro: Leptocheirus Zaddach 
1844]. James D. Dana in: Amer. J. 
Sei., ser. 2 v.8 p.137. 1849 VIL. 


Leptophoxus G@.O. Sars, Crust. Norway, 
v.1 p.146. 1891. Sp.: L. falcatus. 


Leptothoe William Stimpson in: Smith- 
son. Contr., v.6 nr.5 p.46. 1853. Sp.: 
L. danae. 

Leuceothöe [William Elford Leach in:] 
Edinb. Ene., v.7 p.386, 403, 432, 435. 
[1813/14.]Sp.: L.articulosa ( Cuvieria a.). 


Liljeborgia Ü. Spence Bate (& J. O. 
Westwood), Brit. sess. Crust., v. 1 
p:202. [1862 IL 1.] Sp.: L. pallida, 
L. shetlandica. „in compliment to.... 
Professor Liljeborg“. 

Lilljeborgia [pro: Liljeborgia Bate 1862]. 
Axel Boeck in: Forh. Selsk. Christian., 
1870 p.154. 1871. 


Lockingtonia W.G. W. Harford in: P. 


Calif. Ac., v.7 p.53. 1877. Sp.: L. 
flwialis. „dedicate...to Mr. W. N. 
Lockington“. 


Lonchomerus Ü. Spence Bate in: Rep. 
Brit. Ass., Meet. 25 p.58. 1856. Sp.: 
L. graeilis. [nom. nud.] 

Lonchomerus C. Spence Bate in: Ann. 
nat. Hist., ser.2 v.19 p.143. 1857. Sp.: 
L. graeilis. 

Lusyta Gio. Domenico Nardo, 
Fauna Venet., p.20. 1847. Sp.: 
algensis. 

Lycesta Jules-Cösar Savigny, M&m. An. 
s. Vert., ©. 1 p. 109. 1816I. Sp.: L. 


Prosp. 
Cancer 


furina. 
Lyeianassa [pro: Lysianassa H. Milne 
Edwards 1830. Thomas Bell in: 


Belcher, Last aret. Voy., v.2 p. 406. 
1855. 


Lysianassa H. Milne Edwardsin: Ann, 


Sci. nat., v.20 p. 364. 1830. Sp.: L. 
costae, L. chauseica. 


797 


Lysianassina Subgen. Achille Costa in: 
Annuario Mus. Napoli, v.4 p.43. 1867. 
Sp.: Lysianassa filicornis, L. longicornis. 


Lysianax pro: Lysianassa H. Milne Ed- 
wards 1830. Thomas R. R. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 681, 
1676. 1888, 

Lysianella G. O. Sars in: Forh. Selsk. 
Christian., 1882 nr.18 p.78. 1882. Sp.: 
L. petalocera. 


Lysianopsis S. J. Holmes«in: Amer. 
Natural., v. 37 p. 276. 1903IV. Sp.: 
L. alba. 


Lysita pro: Lusyta Nardo 1847. Gio. 
Domenico Nardo in: Mem. Ist. Yanpio, 
v.14 p. 283, 340. [1869]. 


Macleayia William A. Haswell in: Ann. 
nat. Hist., ser.5 v.5 p.32. 1880. 


Macrohectopus pro: Constantia Dybows- 
ky 1874. T.R.R. Stebbing in: Tier- 
reich, v.21 p. 394. 1906 IX. „Moaxpös, 
long, Extog, sixth, molc, foot“. 


Maera [William Elford Leach in:] Edinb. 
Ene., v.7 p.386,403,452,436. [1813/14.] 
Sp.: M. grossimana (Mülleria g.). 


Maeroides Alfred O. Walker in: P. 
Liverp. biol. Soe., v. 12 p. 282. 1898. 
Sp.: M. thompsoni. 

Maerza [pro: Maera Leach 1813/14]. 
[Pierre Andre] Latreille in: G. Cu- 
vier, R£gne an., v%.3 p.47. 1817. 


Megalonoura ([Alfred Merle] Norman 
in MS.) (A. O. Walker in:) W. A. 
Herdman in: P. Liverp. biol. Soc., 
v.3 p.39. 1889. Sp.: M. agilis. 


Megalorchestes J. F. Brandt in: Bull. 
phys.-math. Ac. St.-Pötersb., v.9 p.142. 
185119. Sp.: M. californianus, ?Or- 
chestia longicornis. 


Megalorchestia [pro: Megalorchestes F. 
Brandt 1851]. J. F. Brandt in: Bull. 
phys.-math. Ace. St.-Pötersb., v.9 p.310. 
1851 V31. Sp.: M. californiana, ?M. 
longicornis. 

Megaloura pro: Megaluropus [Hoek 1889]. 
(A. Merle Norman in MS.) P.P.C. 
Hoek in: Tijdschr. Nederl. dierk. Ver., 
ser.2 v.2 p.198. 1889 Ill. 

Megaluropus (A. Merle Norman in MS.) 
P. P. C. Hoek in: Tijdschr. Nederl, 
dierk. Ver., ser.2 v.2 p.197. 1889 IIT. 
Sp.: M. agilis. 


798 Nomenclator generum et subgenerum 


Megamaera [pro: Megamoera Bate 1862]. 
C. Spence Bate, Cat. Amphip. Brit. 
Mus., t.39. 1862. 


Megamoera C. Spence Bate (& J.O. | 
ı Microdeuteropus pro: Microdeutopus A. 


Westwood), Brit. sess. Orust., vo. 1 
p.400. [1862 XI1.] Sp.: M. semiser- 
rata, M. longimana, M. othonis, ?M. 
alderi, M. brevicaudata. 


Megamphopus Alfred Merle Norman in: 
Rep. Brit. Ass., Meet. 38 p. 282. 1869. 
Sp. typ.: M. cornutus. 


Melita [William Elford Leach in:] Edinb. 
Enc., .7 p.386,403,432,435. [1813/14.] 
Sp.: M. palmata (M. palmeta) (Boscia 
nigricans). 


Melite [pro: Melita Leach 1813/14]. [Pi- 
erre Andr&] Latreillein: G. Cuvier, 
Regne an., v.3 p.47. 1817. 


Melphidippa Axel Boeckin: Forh. Selsk. 
Christian., 1870 p.218. 1871. Sp.: M. 
spinosa, M. longipes, M. borealis. 


Melphidippella G. O. Sars, Crust. Nor- 
way, o.1 p.487. 1894. 'Sp.: M. macera. 


Menigrates Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.113. 1871. Sp.: M. 
obtusifrons. 


Mesopleustes ThomasR.R.Stebbingin: 
Ann. nat. Hist., ser. 7 v.4 p.209. 1899. 
Sp. typ.: Pleustes abyssorum. 


Metaphoxus Jules Bonnier in: Ann. 
Univ. Lyon, v. 26 p. 630. 1896. Sp.: 
M. typicus. 


Metopa Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.140. 1871. Sp.: M. 
clypeata, M. glacialis, M. alderi, M. 
bruzelii, M. affinis, M. longicornis, M. 
megacheir, M. longimana, M. nasuta. 


Metopella @. 0. Sars, Crust. Norway, 
v.1 p.274. 1892. Sp.: Metopa longi- 
mana, M. neglecta, M. nasuta. 


Metopina [Alfred Merle]l Norman in: 
Ann.nat. Hist., ser. 7 0.6 p.45. 1900 VL. 
Sp. typ.: Metopa palmata. 


Metopoides Antonio Della Valle in: 
F. Fl. Neapel, v.20 p. 907. 1893. Sp.: 
Metopa magellanica, M. parallelocheir, 
M. ovata, M. compacta. 


Microcheles Henrik Kreyer in: Naturh. 
Tidsskr., ser.2 v.2 p.58,66. 1846. Sp.: 
M. armata. 


Microdentopus pro: Microdeutopus A. 
Costa 1853. C. Spence Bate (& J. O. 
Westwood), Brit. sess. Crust., ®v, 1 
p. 287. [1862IV 1.] 


Costa 1853. C. Spence Bate & J.O. 
Westwood, Brit. sess. Crust., v.1 
p- 287. [1862IV1.] 


Microdeutopus Achille Costa in: Rend. 
Soc. Borbon., n. ser. ©.2 p. 171, 178. 
1853. Sp.: M. gryllotalpa. 


Microjassa Thomas R. R. Stebbing in: 
Ann. nat. Hist., ser.7 v.3 p.240. 1899. 
Sp.: Podocerus cumbrensis. 


Microplax pro: Iduna A. Boeck 1861. 
William Lilljeborg in: N. Acta Soe. 
Upsal., ser.3 v.6 nr.1 p.18 (tabella), 
19. 1865. 


Microprotopus Alfred Merle Norman 
in: Rep. Brit. Ass., Meet. 36 p.197, 203. 
1867. Sp.: M. maculatus. 


Micruropus Thomas R. R. Stebbing in: 
Tr. Linn. Soc. London, ser.2 v.7 p.424. 
1899V, Sp.: M. puella, M. inflatus, 
M. vortex, M. talitroides, M. littoralis, 
M. glaber, M. rugosus, M. wahlii, M. 
fiesenii, M. perla, M. klukii, M. pachy- 
tus. „refers to the smallness of the 
third uropods“. 


Moera [pro: Maera Leach 1813/14]. 
[Henri] Milne Edwards, Hist. nat. 
Crust., v.8 p.54. 1840. 


Monoculodes William Stimpson in: 
Smithson. Contr., ©.6 nr. 5 p. 54. 1853. 
Sp.: M. demissus. 


Monoculopsis G.O.Sars, Crust. Norway, 
v.1 p.810. 1892. Sp.: M. longicornis. 


Montagua (. Spence Bate in: Rep. Brit. 

Ass., Meet. 25 p.57. 1856. Sp.: M. 

' monoculoide, M. marinus, M. pol- 
lexianus, M. dubius. 


Montaguana pro: Montagua Bate 1856. 
Charles Chilton in: Tr. N. Zealand 
Inst., v.15 p.78. 1883. 


Mülleria [pro: Maera Leach 1813/14]. 
[William Elford Leach in:] 
Ence., v.7 p.436. [1813/14.] 


Naenia [pro: Noenia Bate 1862]. ©. 
Spence Bate, Cat. Amphip. Brit. Mus., 
p.271. 1862. | 


Nannonyx G. O. Sars, Crust. Norway, 
v.1 t.24. 1890. Sp.: N. goösii. 


ur 


dal a 4 6 ee ze 


ya 
” Si 
Bi: 


Edinb. 


an 


er un 


Nomencelator generum et subgenerum 799 


Nemertes (jWilliam Elford] Leach in 
MS.) [Adam White], Crust. Brit. Mus., 
p. 90. 1847. Sp.: N. nesaeoides. [|nom. 
nud.] 


Neobula [pro: 
J. Vietor Carus in: 
p-291. 1880 VI 21. 


Neobule William A. Haswell in: P. 
Linn. Soc. N. S. Wales, ©. 4 p. 255. 
1879. Sp.: N. algicola. 


Neohela pro: Hela A. Boeck 1861. S. 
IL Smithin: P.U.S. Mus., v.3 p.448. 
1881. 


Neoniphargus Thomas R. R. Stebbing 
in: Tr. Linn. Soc. London, ser. 2. v,7 
p.424. 1899V. Sp. typ.: N. thomsoni. 


Neopleustes T. R. R. Stebbing in: 
Tierreich, e.21 p. 311. 1906 IX. Sp. 
typ.: Amphitoe pulchella. ‚veoc, new, 
and Pleustes“. 


Nicea [Hereule Nicolet in:] Gay, Hist. 
Chile, v.3 p.237. 1849. Sp.: N. lucasiüi, 


Nieippe Ragnar M. Bruzelius in: Svenska 
Ak. Handl., n. ser. ©.3 nr. 1 p.37, 99, 
[1859]. Sp.: N. tumida. ,„.Namn pä en 
dotter af Pelops“. 


Neobule Haswell 1879]. 
Zool. Anz., vu. 3 


Niphargoides G.O.Sars in: Bull. Ae. 


St.-Pötersb., ser.5 v.1 p.371. 1894 XII. 
Sp. typ.: N. caspius. 

Niphargus J. C. Schiödte in: Danske 
'Selsk. Skr., ser. 5 v.2 p. 26. [1849.] 
Sp.: N. stygius. „Nipapyos“. 

Noenia C. Spence Bate (& J.O. West- 
wood), Brit. sess. Crust., ®. 1 p. 471. 
[1862 XII 1.] Sp.: N. tuberculosa, N. 
rimapalmata, N.excavata, N. undata, 
?Gammarus spinipes. 

Normania Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.119. 1871. Sp.: N. 
qvadrimana. 


Normanion pro: Normania A.Boeck 
1871. Jules Bonnier in: Bull. sei. 
France Belgique, v. 24 p. 167. 1893 V 5. 


Nototropis Achille Costa in: Rend. Soe. 
Borbon., n. ser. v.2p.170, 173. 1853. 
Sp.: Notrotopis spinulicauda. 


Notrotopis [pro: Nototropis A. Costa 1853]. 
Achille Costa in: Rend. Soc. Borbon., 
n. ser. v.2 p.173. 1853. 


Odius pro: Otus Bate & Westwood 1862. 
William Lilljeborg in: N. Acta Soc. 
Upsal., ser.3 0.6 nr.1 p.18 (tabella), 19. 
1865. 


Odontogammarus Thomas R. R. Steb- 
bing in: Tr. Linn. Soc. London, ser. 
2 0.7 p.427. 1899 V. Sp.: O. calca- 
ratus, O. margaritaceus. „alludes to 
the tooth on the fifth sideplates‘“. 


Oediceroides Thomas R. R. Stebbing 
in: Rep. Voy. Challenger, v.29 p.843. 
1888. Sp.: O. rostrata (O. conspieua), 
O. cinderella, O. ornata. 


Oediceropsis William Lilljeborg in: N. 
‘ Acta Soc. Upsal., ser.8 v.6 nr. 1 p.18 
(tabella), 19. 1865. Sp.: O. brevicornis. 


Oediceros Henrik Kroyer in: Naturh. 


Tidsskr., v.4 p.155. 1842. Sp.: ©. 
saginatus. „Orldew, tumeo et xepag, 
eornu*. 


Oedicerus [pro: Oediceros Kreyer 1842]. 


James D. Dana in: Amer. J. Sci., ser. 2 
v.8 p.138. 1849 VII. 


Ommatogammarus Thomas R. R.Steb- 
bing in: Tr. Linn. Soc. London, ser. 2 
v.7 p.427. 1899 V. Sp.: O. albinus, 
O. flavus, O. carneolus, O. amethystinus. 
„alludes to curious character of the 
eyes“. 


Onesimoides Thomas R. R. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 647. 
1888. Sp.: O. carinatus. „to call atten- 
tion to the relationship between this 
genus and Onesimus, Boeck“. 


Onesimus [pro: Onisimus A. Boeck 1871]. 
xel Boeck. Skand. Arkt. Amphip., 
v.1 t.4,5,6. 1872. 


Onisimus Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.111. 1871. Sp.: ©. 
litoralis, O. plautus, O. edwardsii. 


Opis Henrik Kroyer in: Naturh. Tidsskr., 
v.4 p.149. 1842. Sp.: O. eschrichtii. 
„Nomen virginis Hyperboreae“. 


Opisa Axel Boeck, Skand. Arkt. Amphip., 
v.2 p.190. 1876. Sp. typ.: Opis typica 
(Opisa eschrichti). „Qmoa (en Pige 
hos Herodot)‘. 


Oradarea Alfred OÖ. Walker in: J. Linn. 
Soe., v.29 p.40,56. 1903 VIL 30. Sp.: 
O.longimana. „Ora= beach, and Adare“. 


Orchestes [pro: Orchestia Leach 1813/14]. 
[William Elford Leach in:] Edinb. 
Ene., v.7 p.402. [1813/14.] 


Orchestia [William Elford Leach in:] 
Edinb, Ene., v.7 p.402,432. [1813/14.] 
Sp.: O. littorea. 


800 


Orchestoidea [Hereule Nicoletin:] Gay, 
Hist. Chile, e.3 p.229. 1849. Sp.: O. 
tuberculata. 


Orchomena [pro: Orchomene A. Boeck 
1871]. Eduard von Martens in: Zool. 
Reec., v.8 p.188. 1873. 


Orchomene Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.114. 1871. Sp.: O. 
pingvis, O.serratus, O.minutus, O. goesii, 
O. umbo. 

Orchomenella G.O.Sars, Crust. Norway, 
v.1 p.66. 1890. Sp.: O. minuta, 0. 
pingvis, O. ciliata, O. groenlandica, 
? Tryphosa barbatipes. 

Orchomenopsis G. OÖ. Sars, Urust. Nor- 

. way, v.1 p.73. 1891. Sp.: Orchomene 
musculosus, ©. abyssorum, ? 0. exca- 
vatus, Orchomenopsis obtusa. 


Orthopalame P.P.C.Hoek in: Tijdschr. 
Nederl. dierk. Ver., ».4 p.123. 1879. 
Sp.: O. terschellingi. „Von öptog (recht, 
gerade) und TTaAdun (palma, Palme)“. 


Otus ©. Spence Bate & J.O. Westwood, 
Brit. sess. Crust., v.1 p.223. [1862111.] 
Sp.: O. carinatus. „son of Iphimedia“. 


Palinnotus Thomas R. R. Stebbing in: 
Ann. nat. Hist., ser.7 v.5 p.16. 1900. 
Sp. typ.: P. thomsoni. 


Pallasea C. Spence Bate, Cat. Amphip. 
Brit. Mus., p. 200, 380. 1862. Sp.: P. 
cancellus, P. cancelloides. 


Pallasia [pro: Pallasea Bate 1862]. Axel 
Boeckin: Forh. Selsk. Christian., 1870 
p- 206. 1871. 


Pallasiella [pro: Pallasea Bate 1862]. 
G.O.Sars, Crust. Norway, v.1 p. 508. 
1894. 


Pandora pro: Pandorites G. O. Sars 1895. 
([0.] Grimm in MS.) G. O. Sars in: 

x Bull. Ace. St.-Petersb., ser.5 v.3 p. 287. 
1895X. 


Pandorites G. O. Sars in: Bull. Ae. St.- 
Pötersb., ser.5 v.3 p.287. 1895X. Sp. 
typ.: P. podoceroides. 


Panoplaea [pro: Panoploea G.M. Thomson 
1880. G. M. Thomson in: Tr. N. 
Zealand Inst., v.13 p.212. 1881. 


Panoploea George M. Thomson in: Ann. 
nat. Hist., ser.5 v.6 p.2. 1880. Sp.: 
P. spinosa, P. debilis. 

Paracalliope Thomas R. R. Stebbing 
in: Ann, nat. Hist., ser.7 v.4 p.210. 
1899. Sp. typ.: Calliope fluviatilis. 


Nomenclator generum et subgenerum 


Paracallisoma Ed. ÖÜhevreux in: Bull. 
Soe. zool. France, v.28 p.84. 1903II. 
Sp.: P. alberti. 


Paraceradocus Thomas R. R. Stebbing 
in: Tr. Linn. Soe. London, ser.2 ©.7 
p: 426. 1899 V. Sp. typ.: P. miersüi. 


Paracorophium Thomas R. R. Stebbing 
in: Ann. nat. Hist., ser.7 v.3 p. 350. 
1899. Sp.: Corophium excavatum. 


Paracrangonyx ThomasR.R. Stebbing 
in: Tr. Linn. Soc. London, ser. 2 v.7 
p- 422. 1899 V. Sp. typ.: P. compactus. 


Paracyphocaris Ed. Chevreuxin: Bull. 
Mus. Monaco, nr.32 p.1. 1905 IV 15. 
Sp. typ.: P. praedator. 


Paracyproidea Thomas R. R. Stebbing 
in: Ann. nat. Hist., ser. 7 v.4 p. 207. 
1899. Sp. typ.: Oyproidea lineata. 


Paradexamine Thomas R. R. Stebbing 
in: Ann. nat. Hist., ser.7 v.4 p.210. 
1899. Sp. typ.: Dexamine pacifica. 


Paradryope Thomas R. R. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 1151. 
1888. Sp.: .P. orguion. 


Paradulichia AxelBoeckin: Forh. Selsk. 
Christian., 1870 p.265. 1871. Sp.: P. 
typica. 

Paragrubia Ed. Chevreux in: Mem. 
Soc. zool. France, v. 14 p. 426. 1901. 
Sp.: P. vorax. 


Parajassa pro: Janassa A. Boeck 1871. 
Thomas R. R. Stebbing in: Ann. nat. 
Hist., ser.7 e.3 p.240. 1899. 


Paraleptamphopus Thomas R. R. Steb- 
bing in: Ann. nat. Hist., ser. 7 ».4 
p- 209. 1899. Sp.: Calliope subter- 
ranea, Pherusa caerulea. 


Paraleucothoe Thomas R. R. Stebbing 
in: Ann. nat. Hist., ser.7 v4 p.208. 
1899. Sp. typ.: Lencothoe novae-hol- 
landiae. 


Parambasia A. O0. Walker & Andrew 
Seott in: H.O.Forbes, Nat. Hist. So- 
kotra, p.217,221. 1903. Sp.: P. forbesii. 


Paramera [pro: Paramoera Miers 1875]. 
(Edward J. Miers in:) Samuel H. 
Scudder, Nomenel. zool., suppl. L. 
p.247. 1882. 


Parametopa Ed. Cheyreux in: Bull. 
Soe. Rouen, v. 36 p. 233. 1901. Sp.: 
P. kervillei. 


E 
4 
A 


* 


Paramicruropus Thomas R.R.Stebbing 
in: Tr. Linn. Soc. London, ser.2 v.7 
p-423. 1899V. Sp.: P. solskii, P. tac- 
zanowsküi. 


Paramoera Edward J. Miers in: Ann. 
nat. Hist., ser.4 v.16 p.75. 1875. Sp.: 
Melita fresnelii, M. tenwicornis, Para- 
moera australis. 


Paramphithoe Ragnar M. Bruzelius in: 
Svenska Ak. Handl., n.ser. &.3 nr.1 
p. 87, 68. 1859. Sp.: P. panopla, P. 
pulchella, P. hystrix, P. compressa, P. 
bicuspis, P. tridentata, P. elegans, P. 
laeviuscula, P. norvegica. 


Paranaenia Charles Chilton in: Tr. N. 
Zealand Inst., v. 16. p. 258. 1884 V. 
Sp.: P. typica, P. dentifera, P. longi- 
manus. 


Parandania Thomas R.R. Stebbingin: 
Ann. nat. Hist., ser.7 v.4 p.206. 1899. 
Sp. typ.: Andania boecki. 


Parapallasea Thomas R. R. Stebbing 
in: Tr. Linn. Soe. London, ser. 2 
v.7 p.429. 1899V. Sp.: P. borowski, 
P. lagowskit, P. puzyllii. 


Parapherusa pro: Harmonia Haswell 
1879. T. R. R. Stebbing in: Tier- 
reich, v. 21 p. 383. 1906IX. „TTapd, 
beside, Pherusa“. 


Paraphoxus G@. O.Sars, Crust. Norway, 
v.1 p.148. 1891. Sp.: P. oculatus. 


Parapleustes R. Buchholz in: Zweite 
D. Nordpolarf., v. 2 p. 299, 337, 398. 
1874. Sp.: P. glacilis (P. graeilis). 


Pararistias David Robertson in: P. 
nat. Hist. Soe. Glasgow, n.ser. v.3 p.201. 
1892. Sp.: P. audouinianus. 


Paratryphosites ThomasR.R.Stebbing 
in: Ann. nat. Hist., ser.7 v.4 p. 206. 
1899. Sp. typ.: Lysianassa abyssi. 


Paratylus G. O. Sars, Crust. Norway, 
v.1 p. 462. 1893. Sp.: P. swammer- 
dami, P. falcatus, P. vedlomensis, P. 
smitti, P. nordlandicus, et aliae. 


Pardalisca Henrik Kroyer in: Naturh. 
Tidsskr., v.4 p.153. 1842. Sp.: P. eus- 
pidata. „Nomen ancillae apud Plau- 
tum in Casina“*., 


Pardaliscella G. O.Sars, Urust. Norway, 
v.1 p.407. 1893. Sp.: P. boeckii. 


Nomenelator generum et subgenerum 80 


Pardaliscoides Thomas R. R. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 1725. 
1888. Sp.: P. tenellus. 


Parelasmopus Thomas R. R. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 1029. 
1888. Sp.: P. suluensis. 


Parharpinia Thomas R. R. Stebbing 
in: Ann. nat. Hist., ser.7 o.4 p. 207. 
1899. Sp. typ.: Phoxus villosus. 


Parhyale Thomas R. R. Stebbing in: 
Tr. Linn.-Soc. London, ser.2 v.7 p.26. 
1897 V. Sp.: P. fasciger. 


Paroediceros G.O.Sars, Crust. Norway, 
v.1 p.291. 1892. Sp.: Oediceros macro- 
cheir, O. curvirostris, O. sp., Paroedi- 
ceros Iynceus, P. propingvus. 


Paronesimus Thomas R. R. Stebbing 
in: Bijdr. Dierk., v.17/18 p.2,14. 1894. 
Sp.: P. barentsi. „near to ÖOnisimus“. 


Paropisa Thomas R. R. Stebbing in: 
Ann. nat. Hist., ser.7 v.4 p.206. 1899. 


Sp. typ.: Opisa hispana. 


Parorchestia Thomas R. R. Stebbing 


in: Tr. Linn. Soc. London, ser.2 ®.7 
p- 397, 402. 1899V. Sp.: Orchestia 
tenuis, O. hawaiensis, O0. sylvicola. 
„mapd, near, and ÖOrchestia“. _ 


Peltocoxa J. D. Catta in: Rev. Sci. nat., 


v.4 p.161. 1875. Sp.: P. marioni. 


Pephredo C.S.Rafinesque-Schmaltz, 
Preeis Decouv. somiol., p.26. 1814. 
Sp.: P. heteroclitus. [nom. nud.] 


Pephredo C.S. Rafinesque in: Amer. 
monthly Mag., v.2 p.41. 1817 XI. Sp.: 
P. potamogeti. 


Pereionotus ©. Spence Bate & J.O. 
Westwood, Brit. sess. Crust., v.1 
p-226. 1862111. Sp.: P. testudo. 


Perioculodes G.O. Sars, Crust. Norway, 
v.1 p.812. 1892. Sp.: P. longimanus. 


Perrierella Ed. Chevreux & E.-L. 
Bouvier in: Bull. Soe. zool. France, 
v.17 p.50. 1892. Sp.: P. erassipes. 


Phaedra C. Spence Bate in: Quart. J. 
geol. Soe., v.15 p.138, 140. [1858.] 
Sp.: P. antiqua. 


Pherusa [William Elford] Leach in: 
Edinb. Enc., 0.7 p.432. [1813/14.] 
Sp.: P. fueicola. 


Das Tierreich. 21.Lief.: T. R. R. Stebbing, Amphipoda I. 51 


802 


Phippsia pro: Aspidopleurus O. Sars 1891. 
T.R. R. Stebbing in: Tierreich, o. 21 
p. 89. 1906 IX. „After Constantine 
John Phipps“. 


Phlias E. Gu6rin[-Möneville] in: Mag. 
Zool., C1.7 t.19. 1836. Sp.: P. serratus. 
„Phlias, ’un des Argonautes“. 


Photis HenrikKreyer in: Naturh, Tidsskr., 
v.4 p.155. 1842. Sp.: P. reinhardi. 
„Nomen ancillae apud Apuleium in 
Asino aureo‘“. 


Phoxocephalus pro: Phoxus Kroyer 1842. 
Thomas R.R.Stebbing in: Rep.Voy. 
Challenger, v.29 p. 810. 1888. 


Phoxus Henrik Kroyer in: Naturh. 
Tidsskr., v.4 p.150. 1842. Sp.: P. 
holbölli, P. plumosus. ,„®oEoc, capite 
acuto*. 


Phreatogammarus Thomas R. R. Steb- 
bing in: Tr. Linn. Soc. London, ser, 2 
v.7 p.427. 1899 V. Sp. typ.: P. fragilis. 
„means a well-Gammarus“. 


Platamon Thomas R. R. Stebbing in: 
Rep.Voy. Challenger, v.29 p.642. 1888. 
Sp.: P. longimanus. „from the Greek 
word mAarauıv, a broad space“. 


Platophium James D. Dana in: Amer. 
J. Sei., ser.2 v.14 p.309. 1852XI. — 
James D. Dana in: U.S. expl. Exp., 
v.13m p.831, 837. [1853.] Sp.: P. 
brasiliense. 


Platyischnopus Thomas R. R. Stebbing 
in: Rep. Voy. Challenger, v.29 p.830. 
1888. Sp.: P. mirabilis. „nAarlc, broad, 
ioxvög, narrow, molc, a foot“. 


Platyschnopus [pro: Platyischnopus T. 
Stebbing 1888]. Antonio Della Valle 
in: F. Fl. Neapel, v.20 p.784. 1893. 


Pleonexes (. Spence Bate in: Rep. Brit. 
Ass., Meet. 25 p. 59. 1856. Sp.: P. 
gammaroides. |nom. nud.] 


Pleonexes C. Spence Bate in: Ann. nat. 
Hist., ser.2 v.19 p.147. 1857. Sp.: 
P. gammaroides. 


Plesiogammarus Thomas R.R.Stebbing 
in: Tr. Linn. Soe. London, ser.2 v7 
p. 426. 1899V. Sp. typ.: P. gerst- 
aeckeri. 


Pleuracanthus W. Garjajeff in: Trudui 
Kazan. Univ., v.385 nr.6 p.16. 1901. 
Sp. & Subsp.: P. niger, P. lovenü, P. 
borowski, P.b. var. abyssalis, P. b. var. 
dichraas, P. puzyllü, P. lagowskii. 


Nomenclator generum et subgenerum 


Pleustes C. Spence Bate in: Ann. nat. 
Hist., ser.3 v.1 p.862. 1858. Sp.: P. 
tuberculata. . 


Plexaura C.S. Rafinesque, Anal. Nat., 
p.101. 1815. [nom. nud.] 


Podoceropsis Axel Boeck in: 
Skand. Naturf., Mode 8 p. 666. 
Sp.: P. sophia. 

Podoceros[pro: Podocerus Leach 1818/14]. 


A.Goös in: Öfv. Ak. Förh., v.22 p.582. 
1866. 


Podocerus [William Elford Leach in:] 
Edinb. Ene., 0.7 p.433. [1813/14.] Sp.: 
P. variegatus. 


Forh. 
1861. 


Podoprion Edouard Chevreuxin: Möm. 
Soe. zool. France, v.4 p.6. 1891. Sp.: 
P. bolivari. 


Podoprionella G.O.Sars, Crust. Norway, 
v.1 p.687. 1895. Sp.: P. norvegica. 


Podoprionides Alfred O. Walker in: 
Ann. nat. Hist., ser. 7 ©.17 p.457. 1906 V. 
Sp.: .P. incerta. 


Poekilogammarus Thomas R. R. Steb- 
bing in: Tr. Linn. Soc. London, ser. 2 
v.7 p.428. 1899 V. Sp.: P.pietus, P. 
orchestes, P. talitrus, P. araneolus. 
„alludes to the variegated colouring 
of the several species“. 


Polyacanthus W. Garjajeff in: Trudui 
Kazan. Univ., ®. 385 ar. 6 p. 16. 1901. 
Sp. & Subsp.: P. belkinii, P. maximus, 
P. flavus, P. korotneffü, P. albus, P. 
godlewskü, P. g. var. vietoriü, P. para- 
siticus. 

Polycharia [pro: Polycheria Haswell 
1879]. W.T.Calmanin: Ann.N. York 
Aec., v.11 p.288. 1898 VIII 31. 


Polychelia pro: ‚Polycheria Haswell 1879. 

' George M.Thomsonin: Tr.N. Zealand 

Inst., v.14 p.283. 1882 V. ‚from its 
many claws‘“. 


Polycheria William A. Haswell in: P. 
Linn. Soc. N. S. Wales, v.4 p.345. 1879. 
Sp.: P. tenuipes, P. brevicornis. 


Polychiria pro: Polycheria Haswell 1879, 
Eduard von Martens in: Zool. Reec., 
v.16 Crust. p.31. 1881. 


Pontharpinia Thomas R. R. Stebbing 
in: Tr. Linn. Soe. London, ser. 20.7 


p. 82. 1897 V. Sp.: P. pinguis. 


Pontiporeia [pro: Pontoporeia Kroyer 
. 1842]. James D. Dana in: U. S. expl. 
Exp., v.13u1 p. 912. [1853]. 


Pontocrates AxelBoeckin: Forh. Selsk. 
Christian., 1870 p. 171. 1871. Sp.: 
P. norvegicus, P. haplocheles. 


Pontogeneia Axel Boeckin: Forh. Selsk. 
‘ Christian., 1870 p. 193. 1871. Sp.: 
P. inermis. 


Pontogenia [pro: Pontogeneia A. Boeck 
1871]. Eduard von Martens in: Zool, 
Ree., v.8 p.190. 1873. 


Pontoporeia Henrik Kreyer in: Naturh. 
Tidsskr., v.4 p.152. 1842. Sp.: P. 
femorata. „TTovronöpeia (pontivaga), 
nomen Nereidis apud Hesiodum‘“. 


Pontoporia pro: Pontoporeia Kroyer 1842. 
L. Agassiz, Nomenel. zool., Index 
p. 305. 1846. 


Prinassus H.J.Hansen in: Vid. Meddel., 
ser 4 v.9 p.82. 1887. Sp.: P. norden- 
skiöldii. „TTpwaooöc, graesk Bynavn‘. 


Priscilla Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.124. 1871. Sp.: P. 
armata. 


Priseillina pro: Priscilla A. Boeck 1871. 


Thomas R.R.Stebbing in: Rep. Voy. 
Challenger, v.29 p.1680. 1888. 


Probolium Achille Costa in: Rend. Soe. 
Borbon., n. ser. v.2 p.170, 173. 1853. 
Sp.: P. polyprion. 

Proboloides Antonio Della Valle in: 
F. Fl. Neapel, v.20 p.907. 1893. Sp.: 
Metopa gregaria, M. calcarata, M. ere- 
natipalmata, M. nasutigenes. 

Protomedeia Henrik Kroyer in: Naturh. 
Tidsskr., ©. 4 p. 154. 1842. Sp.: P. 
fasciata. „Tpwrouedeia, filia Nerei et 
Doridis“. 


'Psammylla C.S. Rafinesque in: Amer. 


monthly Mag., v.2 p.41. 1817 XI. Sp.: 
P.littoralis. „abbreviated from Psammo- 


psylla*. 


* Pseudalibrotus Antonio Della Valle in: 


F. Fl. Neapel, v.20 p.798. 1893. Sp.: 
P. littoralis. 


Pseudoniphargus Ed. Chevreux in: 
Bull. Soc. zool. France, v.26 p.211. 
1901XIL. Sp.: P. africanus. 


Pseudophthalmus William Stimpson in: 
Smithson. Contr., 0.6 nr.5 p.57. 1853 Ill. 
Sp.: P. pelagicus, P. limicola. 


"Ptilocheirus 


Nomenclator generum et subgenerum 803 


Pseudotiron Ed. Chevreux in: Bull. Soe. 
zool. France, v.20 p.166. 1895. Sp.: 
P. bouvieri. 


Pseudotryphosa@.O.Sars, Crust.Norway, 
v.1 p.83. 1891. Sp.: P.umbonata, Try- 
phosa antennipotens. 


Pterygocera [pro: Pterygocerus Latreille 
1825]. [Pierre Andr&| Latreille in: 
G. Cuvier, Regne an., n. ed. v.4 p.124. 
1829. 


Pterygocerus [Pierre Andre] Latreille 
in: Ene. meth., v.10 p.236. 1825. Sp.: 
Oniscus arenarius. 


William Stimpson in: 
Smithson. Contr., v.6 nr.5 p.55. 1853. 
Sp.: P. pinguis. 


Pyctilus Jacobus D. Dana in: P. Amer. 
Ac., v.2 p.218. 1852. Sp.: Erichthonius 
macrodactylus (P.m.), E. pugnax (P.p.): 
„TüKtng, pugil“. 


Rachotropis [pro: Rhachotropis S.1. Smith 
1883]. Jules Bonnier in: Ann. Univ. 
Lyon, v.26 p.653. 1896. 


Rhachotropis pro: Tritropis A. Boeck 
1871. Sidney I. Smith in: P. U. S. 
Mus., 0.6 p.222. 1883 X5. „Poaxig et 
por“, 


Rozinante Thomas R. R. Stebbing in: 
Bijdr. Dierk., v.17/18 p.2, 38. 1894. 
Sp. typ.: Paramphitho& fragilis. „Don 
Quixote’s famous charger“. 


Sancho Thomas R. R. Stebbing in: Tr. 
Liun. Soe. London, ser. 2 v.7 p.42. 
1897 V. Sp.: S.platynotus. „from a 
character famous in fietion“. 


Scamballa ([William Elford) Leach in 
MS.) [Adam White], Crust. Brit. Mus., 
p. 86. 1847. Sp.: 8. longicornis, 8. 
kuhliana, S. sayana, S.tristensis, 8. 
megalophthalmus. 


Schisturella [Alfred Merle] Norman in: 
Ann. nat. Hist., ser. 7 v.5 p.208. 1900 II. 
Sp.: 8. pulchra. oxıorös, divided, obpd, 
tail“. 

Schraderia Georg Pfeffer in: Jahrb. 


Hamburg. Anst., .5 p. 41 t.2 £.5. 
1888. Sp.: 8. graeilis. 


Scopelocheirus Ü. Spence Bate in: Rep. 
Brit. Ass., Meet. 25 p.58. 1856. Sp.: 
S. breviatus. 
51* 


804 Nomenclator generum et subgenerum 


“ 

Scopelocheirus Ü. Spence Bate in: Ann. 
nat. Hist., ser. 2 ©.19 p.138. 1857. 
Sp.: S. erenatus. 


Seba (A. Costa in MS.) C. Spence Bate, 
Cat. Amphip. Brit. Mus., p. 159. 1862. 
Sp.: S. innominata. 


Siphonaecetes [pro: Siphonoecetes Kroyer 


1845). Edouard Chevreux in: Bull. 
Soe. zool. France, ®. 12 p. 290, 817. 
1887. 


Siphonaecetus [pro: Siphonoecetes Kreyer 
1845]. ©. Spence Bate & J.O. West- 
wood, Brit. sess. Crust., v.1 p.463,467. 
1862 XII 1. 


Siphonocetus [pro: Siphonoecetes Kroyer 
1845]. C. Spence Bate in: Ann. nat. 
Hist., ser. 2 0.19 p. 149. 1857. 


Siphonocoetus [pro: Siphonoecetes Kroyer 
1845]. Augustus de Marschall, No- 
mencl. zool., p.420. 1873. 


Siphonoecetes Henrik Kroyer in: 
Naturh. Tidsskr., ser. 2 v.1 p.481, 491. 
1845. Sp.: $. typicus. „Zıpwv, tubus, 
et oıkerng, incola“. 

Siphonoecetus [pro: Siphonoecetes Kroyer 


1845]. CO. Spence Bate, Cat. Amphip. 
Brit. Mus., p. 268. 1862. 


Socarnella Alfred O. Walker in: Herd- 
man, Rep. Oeylon Pearl Fish., v. 2 
p: 231, 239. 1904. Sp.: S. bonnieri. 


Forh. Selsk. 
Sp.: 8. 


Socarnes Axel Boeck in: 
Christian., 1870 p.99. 1871. 
vahli. 


Socarnioides [pro: Socarnoides T. Steb- 
bing 1888]. Frank E. Beddard in: 
Zool. Rec., 0.25 Index p.15. 1890. 


Socarnoides Thomas R. R. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 690. 
1888. Sp.: S. kergueleni. 


Sophrosyne Thomas R.R. Stebbing in: 

Rep. Voy. Challenger, v. 29 p. 652. 
1888. Sp.: 8. murrayi. „from ow- 
@PpooÜlvn, temperance“. 

Sperchius C.S. Rafinesque, Ann. Nat., 
p.6. 1820. Sp.: $. lueidus. 

Spinifer ([Carl] Holbell in MS.) Henrik 
Kreyer in: Naturh. Tidsskr., 0.4 p. 151. 
1842. Sp.: S. spinosissimus, 8. flagelli- 
formis, Phoxus plumosus. 

Stebbingia Georg ER effer in: Jahrb. 
Hamburg. Anst., v.5 p.110. 1888. Sp.: 
S. gregaria. 


Crust, 
Sp.: :8. 


Stegocephaloides G. O. Sars, 
Norway, v. 1 p.201. 1891. 
christianiensis, S. auratus. 


Stegocephalus Henrik Kroyerin: Naturh. 
Tidsskr., v.4 p.150. 1842. Sp.: S. in- 
flatus. „Zteyw, tego et epaAn, Caput“. 

Stegoplax G. O. Sars in: Forh. Selsk. 
Christian., 1882 nr. 18 p. 88. 1882. 
Sp.: $. longirostris. 

Stenia James D. Dana in: Amer. J. Sei., 
ser.2 v.8 p.136. 1849 VII. — Jacobus 
D. Dana in: P. Amer. Ac., ©.2 p.209. 
1852. Sp.: S. magellanica. 


Stenopleura Thomas R. R. Stebbing in: 
Rep. Voy.Challenger, 0.29 p.949. 1888. 
Sp.: S.atlantica. „from oTevög, narrow, 
and rAeupd, side“. 


Stenopleustes G.O.Sars, Orust. Norway, 
v.1 p.354. 1893. Sp.: $S. malmgreni, 
S. nodifer. 


Stenothoe James D. Dana in: Amer. J. 
Sci., ser.2 v». 14 p. 81l. 1852XI. — 
James D. Dana in: U.S. expl. Exp., 
e.1311 p.923. [1853.] Sp.: S. validus. 


Stenothoides Ed. Chevreux in: Rösult. 
Camp. Monaco, v.16 p.55. 
typ.: 9. perrieri. 

Stenyolus C.S. Rafinesque, Anal. Nat., 
p.101. 1815. [nom. nud.] 


Sthenometopa pro: Metopina A. M.Nor- 
man 1900. A.M. Norman in: Ann. 
nat. Hist., ser.7 v.10 p.480. 1902XIH. 


Stimpsonella pro: Stimpsonia Bate 1862. 
Antonio Della Valle in: F, Fl. Neapel, 
v.20 p.421. 1893. 


Stimpsonia Ü©.Spence Bate (&J.O.West- 
wood), Brit. sess. Crust., ©. 1 p.284. 
[1862 IV 1.] Sp.: 8. chelifera. „in 
compliment to the distinguished natu- 


ralist of the United States’ Exploring _ 


Expedition to the North Paeifie“. 


Stomacontion 'Thomas R. R.Stebbing 
in: Ann. nat. Hist., ser. 7 v.4 p.205. 
1899. Sp. typ.: Acontiostoma pepinü. 

Stygobromus E. D.Cope in: Amer. Na- 
tural., ©. 6 p.409, 413,422. 1872. Sp.: 
S. vitreus. 

Stygodromus [pro: Stygobromus E. D. 
Cope 1872]. Eduard von Martens 
in: Zool. Rec., ©. 10 p.189. 1875. 

Stygonectes William Perry Hay in: P. 
U. S. Mus., ©.25 p. 430. 1902IX 23 
Sp. typ.: Orangonyx flagellatus. 


1900. Sp. 


er! , 
DT En 


Suleator pro: Bellia Bate 1851. ©. Spence 
Bate in: Ann. nat. Hist., ser.2 v.13 
p. 504. 1854. 


Sunamphithoö [pro: Sunamphitoö Bate 
1857]. ©. Spence Bate (& J.O. West- 
wood), Brit. sess. Crust., v.l p.429. 
1862 XI 1. 


' Sunamphitoö (©. Spence Bate in: Rep. 
Brit. Ass., Meet. 25 p.59. 1856. Sp.: 
8. hamulus, S. conformatus. |nom. nud.] 


a Sunamphitoö C. Spence Bate in: Ann. 
nat. Hist., ser.2 v.19 p.147. 1857. Sp.: 
S. hamulus, S. conformata. 


Sympleustes Thomas R.R.Stebbing in: 
Ann. nat. Hist., ser.7 v.4 p.209. 1899. 
Sp.: Amphithoe latipes, Amphithopsis 
glaber, A. pulchella, A.olrikii, A. grandi- 
mana. 


Synamphithoe [pro: Sunamphitoe Bate 
1857]. Adam White, Hist. Brit. Crust., 
p.201. 1857. 


‚Synehelidium G. O.Sars, Crust. Norway, 
v.1 p.317. 1892. Sp.: S. brevicarpum, 
S. haplocheles, 8. intermedium. 


Synopia James D.Dana in: Amer. J.Sci., 
- ser.2 v.14 p.315. 1852. — James D. 
Dana in: U. S. expl. Exp., v. 1311 
p- 994. [1853.] Sp.: $. ultramarina, 

S. gracilis, 8. angustifrons. 


Synopioides Thomas R. R. Stebbing 
in: Rep. Voy. Challenger, v.29 p. 999, 
1224. 1888. Sp.: $. macronyx, 8. se- 
cundus. 


Synurella (A. W. Wrzesniowski in:) 
Hoyer in: Z. wiss. Zool., v.28 p.403. 
18771118. Sp.: 8. polonica. 


Syrrho& A. Goösin: Öfv. Ak. Förh., 0.22 
p-527. 1866. Sp.: S. crenulata, 8. bi- 
cuspis [?]. 

Syrrhoites G. O. Sars, Crust. Norway, 
v.1 p.391. 1893. Sp.: 8. serrata. 


Talitroides (J. Bonnier in:) Victor 
Willem in: Ann. Soc. ent. Belgique, 
v.42 p.208. 1898. Sp.: —. 


Talitronus J. D. Dana in: Amer. J. Seci., 
ser.2 v.9 p.295. 1850V.— Jacobus 
D. Dana in: P. Amer. Ac., v.2 p. 202. 
1852. Sp.: T. insculptus. 


. Talitrorchestia Subgen. J. F. Brandt in: 


Bull. phys.-math. Ac. St.-Pötersb., v.9 ' 


p- 137. 185119. Sp.: Talitrus cloquetii. 


Nomencelator generum et subgenerum 


805 


Talitrus ([Pierre Andrö] Latreille in:) 
L. A. G. Bose, Crust., v.1 p.78 [& 
v.2 p.148, 152]. X [1802]. Sp.: Gam- 
marus locusta, Oniscus gammarellus; 
[Talitrus locusta, T. grillus]. 


Talorchestes [pro: Talorchestia J. D. 
Dana 1852]. H. Filhol in: Recu. 
Passage Venus, v.311 Zool. p.459. 1885. 


* Talorchestia Subgen. James D. Dana in: 


Amer. J. Sei., ser. 2 v. 14 p. 310. 1852 
XI. — James D. Dana in: U. S. expl. 
Exp., v. 1311 p. 851, 861. [1853.] Sp.: 
Orchestia (T.) gracilis, O. (T.?) quoyana. 


Teraticum Charles Chilton in: Tr. N. 
Zealand Inst., v.16 p.257. 1884 V. Sp.: 
T. typicum. 


Tessarops Alfred Merle Norman in: 
Ann. nat. Hist., ser. 4 v. 2 p. 412. 
1868. Sp.: T. hastata. 


Tetradeion Thomas R. R. Stebbing in: 
Ann. nat. Hist., ser. 7 v.4 p.207. 1899. 
Sp. typ.: Cyproidia crassa. „from the 
Greek rerpadeiov, a set of four“. 


Tetromatus Ü. Spence Bate in: Rep. 
Brit. Ass., Meet.25 p.58. 1856. Sp.: 
T.typieus, T. bellianus. — U. Spence 
Bate in: Ann. nat. Hist., ser.2 v.19 
p-139. 1857. Sp.: T. typieus, T. bel- 
hianus. 


Thalitrus [pro: Talitrus Latreille 1802]. 
[Felix Edouard] Gu£rin [-Meneville] 
in: Exp. Moree, Atlas p.3. 1835. 


Thalorchestia [pro: Talorchestia J. D. 
Dana 1852]. H. Filhol in: Reecu. 
Passage Venus, ve. 31m Zool. p. 461, 
Planches p.28. 1885. 


Thersites C. Spence Bate in: Rep. Brit. 
Ass., Meet. 25 p.59. 1856. Sp.: .T. 
guilliamsonia, T. pelagica. [nom. nud.] 


Thersites C. Spence Bate in: Ann. nat. 
Hist., ser.2 v.19 p.146. 1857. Sp.: 
T. guilliamsoniana, T. pelagica. 


Thiella C. S. Rafinesque, Anal. Nat, 
p.101. 1815. [nom. nud.] 


Thoelaos pro: Laothoes A. Boeck 1871. 
Antonio Della Valle in: F. Fl. Ne- 
apel, v.20 p.592. 1893. 


Tiron William Lilljeborg in: N. Acta 
Soe. Upsal., ser.ö v.6 nr.1 p.18 (ta- 
bella), 19. 1865. Sp.: T. acanthurus. 
„Teipwv Proper name“. 


806 


Tmetonyx pro: Hoplöony® O. Sars 1891. 
T. R.R. Stebbing in: Tierreich, v. 21 
p. 73, 720, 1906IX. : ;„tunrtdg, shaped 

‘ by eutting, övuf, nail“. 


Trischizostoma Axel Boeck in: Forh. 
Skand. Naturf., Mode 8 p.637. 1861. 
Sp.: T. raschii. 


Tritaeta pro: Lampra A. Boeck 1871. 
Axel Boeck, Skand, Arkt. Amphip., , 
v.2 p.817. 1876. „Tpıraia, et Egennavn“. 


Tritropis Axel Boeek in: Forh. Selsk. 
Christian., 1870 p.158. 1871. Sp.: T. 
aculeata, T. helleri, T. fragilis. 


Tryphosa Axel Boeck in: Forh. Selsk. 
Christian., 1870 p.117. 1871. Sp.: T. 
nanus, T. höringiüi, T. nanoides, T. lon- 
gipes. 

Tryphosella Jules Bonnier in: Bull. 
sei. France : Belgique, v.24 p.170, 174. 
1893 V 5. Sp.: T.sarsi, T. compressa, 
T. hörringii, T. angulata, T. nanoides, 
T. antennipotens, T. barbatipes. 


Tryphosites G. O. Sars, Ürust. Norway, 
e.l p.81. 1891. Sp. typ.: Anonya 
longipes. 


Typhosa [pro: Tryphosa A.Boeck 1871]. 
Jules Bonnier in: Bull. sei. France 
Belgique, v.24 p.170. 1893 V 5. 


Uneiola Thomas Say in: J. Ac. Philad., 
v.lıı p.388. 1818. Sp.: DT. irrorata. 


Unimelita. 0. A. Sayce in: P.R. Soc. 
Vietoria, v.13 p.237. 1901 III. Sp.: 
U. spenceri, Niphargus montanus. 


Uristes James D. Dana in: Amer. J. Sei., 
ser.2 v.8 p.136. 1849 VII. — Jacobus 
D. Dana in: P. Amer. Ac., v.2 p. 209. 
1852. Sp.: TU. gigas. 


Urothoe James D. Dana in: Amer. J. 
Sei., ser.2 v.14 p.3ll. 1852 XL. — 
James D. Dana in: U. S. expl. Exp., 
v. 1311 p. 920. [1853.] Sp.: U. rostratus, 
U. irrostratus. 


Urothoides Thomas R.R. Stebbing in: 
Tr. zool. Soe. London, v. 131 p. 26. 1891. 
Sp.: U. lachneessa. 


Valettia Thomas R. R. Stebbing in: 
Rep. Voy. Challenger, v.29 p.723. 1888. 
Sp.: V. coheres. „in compliment to the 
Baron Adolphe de la Valette*. 


Nomenelator generum et subgenerum 


Vertumnus (Leach in MS.) [Adam 


White], Crust. Brit. Mus., p.89. 1847. 
Sp.: V. eranchiü. [nom. nud.] 


Vijaya Alfred OÖ. Walker in: Herdman, 
Rep. Ceylon Pearl Fish, ®.2 p.231, 
241. 1904. Sp.: V.tenuipes. „Vijäya, 
an ancient king in Oeylon“. 


Wayprechtia [pro: Weyprechtia Stuxberg 
1880]. A. Birula in: Annuaire Mus. 
St.-Pötersb., v.4 p. 426, 442. 1900, 


Westwoodea Ü.Spence Bate in: Rep. 
Brit. Ass., Meet. 25 p.58. 1856. Sp.: 
W. caeculus, W.carinatus. [nom. nud.] 


Westwoodia |pro: Westwoodea Bate 
1856]. C. Spence Bate in: Ann. nat. 
Hist., ser.2 v.19 p.139. 1857. Sp.: 
W. caecula. 


Westwoodilla pro: Westwoodia Bate 1857. 
C. Spence Bate & J.O. Westwood, 
Brit. sess. Crust., v.1 p.154. [1862 1 1.] 


Weyprechtia Anton Stuxberg in: Bih. 
Svenska Ak., v5 nr.22 p.27. 1880. 
Sp.: W. mirabilis. 

Wyvillea William A. Haswell in: P. 
Linn. Soe. N. S. Wales, v4 p. 336. 
1879. Sp.: W. longimanus. „in honour 
of Prof. Sir ©. Wyville Thomson“. 


Xenocheira William A. Haswell in: P. 
Linn. Soe. N. S. Wales, v.4 p.272. 1879. 
Sp.: X. fasciata. 


Xenochira pro: Xenocheira Haswell 1879. 
Eduard von Martens in: Zool. Ree., 
v.16 Crust. p.31.: 1881. 


Xenoclea Axel Boeck in: Forh. Selsk. 
Christian., 1870 p. 234. 1871. Sp.: 
X, batei. 
Xenodice Axel Boeck in: Forh. Selsk. 


Christian., 1870 p. 266. 1871. Sp.: X. 
frauenfeldti. Pu 


Zacoreus Ü.S. Rafinesque, Anal. Nat., 
p.101. 1815. [nom. nud.] 


Zaramella |pro: Zaramilla T. Stebbing 
1888]. Frank E. Beddard in: Zool. 
Ree., v.25 Index p.17. 1890. 


Zaramilla Thomas R. R. Stebbing in: 
Rep. Voy. Challenger, v.29 p.866. 1888. 
Sp.: Z. kerqueleni. „from an imagi- 
nary personage in Don Quixote“*. 

Zenodice |pro: Xenodice A. Boeck 1871]. 


[Alfred Merle] Norman in: Ann. N 
nat. Hist., ser. 6 v.15 p.493. 189. 


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