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Getty rer ew CS eke a La eet wwe Hoy CSA WH Fae Ae Say bodied mS oy at orn Gn Hkh te Wars PY te a) HALT OPO AG Waa Se WN fe die ae [i “ Ons ie WALA A, ST ede re We A rep pase AAS Pe Pn Sits vy . We eb yons * ay co PES he & 8 Wy Al Wea ey x Mm Atrer Wot ba eh at un \ seit en ME OG ew ee ey veut Leen ith ec Oe a rt ww tas Ae ew ets A AA es dist ti Sk AA get ot LM Na SUT ead q eda Peer Phe Oo i WOE Fk CE Gt ae Fell a HM oa PHA Sine LV As: APR Tih oe el tg ate Ar Oe ee SE LH NG eae Naw 7 AACS arg Hin ye vat awe ba ede eee We Re ha Oba # ¢ ede ee a aipeet ule AM WE TION PCL " us 4d Kaw, ; Cease wane Few 4% ” nary tre ts Pore i 5a Wrote s ae eA Mh © lide e hehe eee em te ok 4adheay An be x “ WOR eee Ca a 6 Wearere «pees 7 ee a Sey i < ¢ Re j J c \e : i By a j { ie mabe ect i * T nH 2 E sf 1 u é i ae Las 5 S x ; i vf i j ume is issued to the Runeouiers to the Ray Society for he the Year 1913. LONDON: MCMXIII. QL UYY PBS Two THE BRITISH PARASITIC COPEPODA THOMAS SCOTT, LL.D., F.L.S. AND ANDREW SCOTT, A.LS. VOLUME II COPEPODA PARASITIC ON FISHES PLATES LONDON PRINTED FOR THE RAY SOCIETY AND SOLD BY DULAU & CO., LTD., 37, SOHO SQUARE, W. 1913 PRINTED BY ADLARD AND SON LONDON AND DORKING DEC 1955 LIBRARN 2 THE AUTHORS DESIRE, WITH THE MOST SINCERE RESPECT, TO DEDICATE THIS WORK TO THE REV. CANON A. M. NORMAN, M.A., D.C.L., LL.D., F.R.S., F.L.S., ETC., IN GRATITUDE FOR HIS UNFAILING KINDNESS AND ASSISTANCE EXTENDED TO THEM FOR MANY YEARS. ah Std =~ > ean eas! wt y my © ia +AU Py ee ; A eG M t a, at é As al om ~ (8a we get © = 1 ais o tad] 1 3 ,. NOTE BY THOMAS SCOTT. — All the figures, unless otherwise described, have be son, Andrew Scott, from specimens examined by the aut The illustrations have all been engraved by André | Se Watford. % ist OR THE Prate I. 1l.—Ergasilus nanus 2.—Bomolochus zeugopteri 3.—B. solex 4..—B. onosi Prats II. 1-5.—Ergasilus nanus 6-9.—Bomolochus solex Prats IIT. 1—-4.— Bomolochus sole 5-7.—B. onosi 8, 9.—B. zeugopteri Prats IV. 1, 2.—Caligus minimus 3-8.—C. rapax PLatE V. 1-3.—Caligus centrodonti 4, 5.—C. labracis Pruate VI. 1, 2.— Caligus rapax 3.—C. brevicaudatus 4, 5.—Lepeophtheirus hippo- glossi Prats VII. 1.—Caligus zei 2,3.—C. pelamydis 39 PAS: Puate VIII. 1,2.—Caligus gurnardi 3—-9.—C. zei » 10,11.—C. brevicaudatus Puate IX. 1-5.—Caliqus pelamydis 6-9.—-Pseudocaligus brevi- pedes PLATE X. 1, 2.— Pseudocaligus brevi- pedes ‘ 3, 4.—Lepeophtheirus pecto- ralis Prare XI. 1-6.—Scizxnophilus tenuis Prate XII. 1.—Lepeophtheirus nord- manni 2,3.—L. pectoralis '4,5.—Demoleus paradoxus Puate XIII. 1-4.— Lepeophtheirus pecto- ralis Puate XIV. ig. 1-10.—Lepeophtheirus pecto- ralis vill LIST OF Puate XV. Fig. 1-9.—Lepeophtheirus pecto- ralis Puate XVI. Fig. 1-3.—Lepeophtheirus pecto- ralis » 4-11.—D. nordmanni Puate XVII. Fig. 1.—Caligus diaphanus a 2.—Lepeophtheirus hippo- glossi a 3.—L. thompsoni fs 4.—I. salmonis i 5, 6.—L. pollachii Piate XVIII. Fig. 1-3.—Caligus centrodonti af 4, 5.—C. labracis a 6, 7.—C. diaphanus », 8-10.—Lepeophtheirus hippo- glossv » 11,12.—L. salmonis » 13-15.—L. pollachii » 16-19.—Z. sturionis Puate XIX. Fig. 1-9.—Liitkenia asterodermi 5 10.— Elytrophora brachy- ptera », 1l-18.—Phyllothreus cornutus PuatE XX. Fig. 1-8.—Nogaus ambiguus 45 9.—Chondracanthus annu- latus - 10.—C. merluceii Pratt XXII. Fig. 1.—Lepeophtheirus sturi- onis e 2.— Pandarus bicolor . 3, 4.—Cecrops latreillii a 5.—Orthagoriscicola muri- cata THE PLATES. PuateE XXII. Fig. 1, 2.—Trebius caudatus ~ 3.—Dinemoura producta 93 4.— Echthrogaleus coleop- tratus 5 5, 6.—Pandarus bicolor Prats XXIII. Fig. 1, 2.—Hlytrophora brachy- ptera ‘se 3.—Phyllothreus cornutus - 4.—Liitkenia asterodermi . 5, 6.—Anthosoma crasswm Pirate XXIV. Fig. 1,2.—Caligus curtus » 38,4.—Philorthragoriscus ser-) ratus Puate XXV. Fig. 1-6.—Thersitina gasterostet 7-9.—Caligus curtus es 10.—Lepeophtheirus thomp- soni » 11-16.—Caligus minimus Puate XXVI. Fig. 1-3.—Dinemoura producta , 4-19.—Pandarus bicolor Puate XXVII. Fig. 1-8.—Dinemoura producta — » 9, 10.—Cecrops latreillii , 11-24.—Philorthragoriscus ser- ratus Pirate XXVIII. Fig. 1-7.—Cecrops latreillit ,, 8-18.—Orthagoriscicola muri- cata PuatE XXIX. Fig. 1.—Echthrogaleus liitkeni ~ 2-5.—Lernanthropus kroyeri LIST PuaTE XXX. 1-8.—Echthrogaleus liitkeni 9-17.—Lernanthropus kréyeri Puate XXXII. 1-6.—Elytrophora brachy- tera 7-18.—Dichelestium oblongum Puate XXXII. . 1-11.—Hatschekia mulli Pirate XXXIII. 1.—Hatschekia cluthe 2.—fZ. labracis 3, 4.—H. hippoglossi 5).—Thysanote impudica 6.—? Lernxopoda lampri Puate XXXIV. 1-5.— Hatschekia cluthe 6, 7.—H. labracis 8-11.— HH. hippoglossi Pratt XXXV. 1, 2.—Hatschekia cornigera 3—7.—H. pygmexa Pirate XXXVI. 1-5.—Hatschekia cornigera 6-9.—H. pygmexa Prate XXXVIL. 1.—Eudactylina acuta 2,3.—F. acanthii A, 5.—EH. similis 6,7.—EH. minuta Pratt XXXVIII. lth —Eudactylina acuta Gl —F. acanthii OF THE PLATES. Fig. Fig. 29 1x Pratt XXXIX. 1-17.— Eudactylina similis Pruate XL. 1-9.—Eudactylina minuta Pruate XLI. 1.—Congericola pallida 2-4.—Chrondracanthus de- Pressus FO), 2190 6.—C. ornatus Puatt XLII. 1-8.—Lernxa branchialis Pirate XLITI. 1-7.— Lernea branchialis Puate XLIV. 1, 2.— Lerneea luscr 3.—L. minuta 4.— T, lumpi 5-7.— Hexmobaphes cyclo- pterina 8.— Hemobaphoides am- biguus Pirate XLV. 1.—Rebelula edwardsi 2,3.—Philichthys xiphiz 4, 5.— Dichelestium oblongum 6.—Tripaphylus mustelt 7 —Ohondracanthus orna- tus 8.—Brachiella rostrata Pratt XLVI. 1-5.—Lerneenicus spratte 6-9.—L. encrasicola Prats XLVI. 1, 2.— Chondracanthus cor- nutus 3.—C. annulatus x LIST OF THE PLATES. Prate XLVII—continued. 4.—Chondracanthus solex A 5.—C. fluree af 6.—C. limandx E 7.—C. clavatus - 8.—C. merluccii Piuate XLVILII. Fig. 1-3.—Lepeophtheirus thomp- sont % 4,5.—L. pollachii ty, 6.—L. brevicaudatus e 7.—Caligus diaphanus » 8-12.—Lernxopoda salmonea », 13-16 —Chondracanthus nodo- Sus Ps 17:—Ergasilus nanus a: 18.—Brachiella insidiosa Puats XIX, Fig. 1-7.—Tripaphylus musteli » 8-ll.—Thysanote impudica » 12-16.—(?) Lernxopoda lampri Puate L. Fig. 1-5.—Lerneocera cyprinacea oe 6-8.—Achtheres percarum a 9.—Brachiella bispinosa Prats LI. Fig 1.—Tripaphylus musteli Fe 2.—Pennella orthagorisci = 3, 4.—Sphyrion lumpi a 5.—Rebelula edwardsi gi 6.—Thersitina gasteroster - 7.—Clavella lophii Pruate LIT. Fig 1-3.—Chondracanthus nodo- sus i 4..—C. lophii e 5.—C. cornutus . 6.—Medesicaste asellinum Pratt LITII. 1-9.— Chondracanthus cor- nutus » 10,11.—C. flure ,» 12-15.— Creoles » 16-19.—C. merlucci Fig. Pratt LIV. Fig. 1-11.—Trebius caudatus ,, 12-17.—Charopinus dalmanni », 18-22.—C. ramosus Puate LV. Fig. 1-4.—Charopinus dalmanni - 5.—C. dubius Me 6, 7.—C. ramosus Puate LVI. Fig. 1-7.—Chondracanthus de- pressus » 8-10.—C. annulatus » 11,12.—C. limandz * 13.—Cieer » 14,15.—C. clavatus » 16-18.—C. lophia Puatte LVII. Fig. 1-7.—Lernzopoda cluthe » 8-12.—L. bidiscalis , 13-17.—L. elongata , 18, 19.—Medesicaste asellinum Pratt LVILII. 1-8.—Pandarus bicolor » 9-15.—Lernxopoda galei "i 16.—L. cluthe Pirate LUX: 1-6.—Lernxopoda salmonea - 7, 8.—Achtheres percarum Puate LX. . 1-3.—Lernxopoda cluthe < 4-6.—L. galei % 7.—Brachiella ovalis Fig. LIS! OF THE PLATES. Xl Pratt LXI. 1,2.—Lernxopoda bidis- calis 3, 4.—L. elongata 5, 6.—L. similis Prate LXII. 1.—Brachiella trigla 2.—B. insidiosa 3.—B. rostrata 4, 5.—B. merluccit Prate LXITII. 1.—Lernxopoda galei 2-8 —Brachiella rostrata 9-16.—B. insidiosa 17-20.—B. merluccii 21-25.—B. trigle 26-30.-—B. ovalis Pruate LXIV. 1-3.—Achtheres percarum 4-6.—Brachiella thynni 7.—B. parkeri 8.—B. pastinaca 9.—B. bispinosa Pratt LXV. 1.—Clavella brevicollis 2,3.—C. uncinata 4, 5.—C. rugosa 6.—C. (?) wneinata 7.—C. dubia 8, 9.—C. stellata 29 be) 39 a7 Pratt LXVI. 1—-7.—Clavella rugosa 8-11.—C. dubia 12-16.—0. brevicollis 17-20.—C. emarginata 21-23.—C. uncinata Pratt LXVII. Fig. 1-3.—Clavella scombri 9 Fig. 99 29 4-6.—C. paradoxa Pirate LXVIII. 1-7.—Clavella scombri 8-14.—C. paradoxa 15.—C. quadrata Pirate LXIX. 1-3.—Clavella canthari 4—6,—O. alata 7.—C. emarginata Puate LXX. ig. 1-13.—Kroyeria lineata Prate LXXI. ig. 1-12.— Eudactylina insolens 13.—Brachiella pastinaca 14.—Caligus pelamydis Pratt LXXII. ig. 1-10.—Argulus foliaceus (x11) REFERENCE LETTERS TO PLATES IV, XII-XV, XLII, anny XLIII. a. antennules. a’. antenne. an. anus. b. median frontal sucker. c. filament duct. cg. cement gland. dg. digestive gland. e. eyes. f. filament. g. ganglia. i. intestine. ls. lateral frontal sucker. ins. lens. m. mouth. md. mandible. me. first maxilla. mex". second maxilla. map. first maxilliped. maep*. second maxilliped. m. nerves. 0. ovary. od. oviduct. oe. cesophagus. os. ovisac. p'. first pair of feet. p™. second pair of feet. |p". third pair of feet. |p. fourth pair of feet. p*. fifth pair of feet. p'. sixth pair of feet. rs. receptaculum seminis. rt. rectum. rin. retina. s. stomach. sbg. sub-cesophageal ganglion. | spg. supra-cesophageal ganglion. sp. spermatophore. t. testis. u. vulva. vd. vas deferens. Nos. 1-138, NeRveEs, as FOLLOWS :— . optic. . antennules. . antenne. mandibles. . lateral frontal margins. . first maxillee. . second maxille. . lateral cephalic muscles. 00 NT > Or OD DO 9. first maxillipeds. 10. second maxillipeds. 11. first feet and stomach muscles 12. second feet and _ posterio cephalic muscles. 13. third feet, fourth feet, fift feet, genital segment, an abdomen. 5 Plate 1 Priate I, Fias. 1. Ergasilus nanus P. J. van Beneden, 2, dorsal view, x 51. (p. 34.) 2. Bomolochus zeugopteri T. Scott, 2, dorsal view, x 44. p. 40. 3. Bomolochus solee Claus, ? , dorsal view, x 24. (p. 36.) 4. Bomolochus onosi T. Scott, ? ,dorsal'view, x 48. (p. 39.) [Note.—At page 30, vol. I (text), after Hrgasilus nanus read P. J. van Beneden instead of Claus. ] - = — é . . , by ’ : = 4 a Zi < nd Gis > - “A ‘ / i 4 3 ne Pesan u ~< .. . - “lg i . en e ye . - 7 2 Prats II. Fias. 1-5. Ergasilus nanus P. J. van Beneden, ¢?. 1. Antennule. 2. Foot of first pair. 3. Foot of third pair. 4. Foot of fourth pair. 5. Abdomen. 6-9. Bomolochus solewx Claus, ?. (p. 36.) 6. Mandible. 7. First maxilliped. 8. Foot of second pair. 9. Foot of fourth pair. (Figures much enlarged.) (p. 34.) Pirate III. Fies. 1-4. Bomolochus solez Claus, 2. (p. 36.) 1. Antennule. 2. Maxilla. 3. Second maxilliped. 4. Foot of first pair. 5-7. Bomolochus onosi T. Scott. (p. 39.) 5. Antennule, ?. 6. Second maxilliped, ?. 7. Second maxilliped, ¢. 8, 9. Bomolochus zeugopteri T. Scott, 9. (p. 40.) 8. Antennule. 9. Second maxilliped. (Figures much enlarged.) PLATE III Fias. Pirate IV. 1, 2. Caligus minimus Otto. (p. 46.) ib 2. Dorsal view, 2, x it, Dorsal view, ¢, x 11. 3-8. Caligus rapax M. Edwards. (p. 48.) 3. Harly “chalimus” stage attached to fin-ray of a coN ei can young cod, x 54. . Late “chalimus ” stage attached to tail of a young lumpsucker, x 15. . Mature part of a frontal plate, shewing lateral sucker (lunula). . Sternal fork, 2. . Second maxilliped, °. . Foot of fourth pair, ?. (Figures 5-8 much enlarged.) PLATE IV a ee ek es a 4 Pirate V. Figs. 1-3. Caligus centrodonti Baird. (p. 50.) 1. Dorsal view, ¢. (After C. B. Wilson.) 2. Dorsal view, ¢, x 16. 3. Dorsal view of a young individual, g, x 16. 4,5. Caligus labracis T. Scott. (p. 53.) 4. Dorsal view, 9, x 21. 5. Dorsal view, ¢, x 21. PLATE V (| ear PMLA LO Siew Prats VI. Fias. 1, 2. Caligus rapaw M. Edwards. (p. 48.) 1. Dorsal view, ?, x 13. 2. Dorsal view, ¢, x 13. 3. Caligus brevicaudatus A. Scott. (p. 56.) 3. Dorsal view, ?, x 16. 4, 5. Lepeophtheirus hippoglossi (Kroyer). (p. 67.) 4. Dorsal view, ?, x 5 5. Dorsal view, o, x 7°d. : E ‘ Q, 7 Pirate VII. Fias. 1. Caligus zeit Norman & T. Scott. (p. 54.) 1. Dorsal view, 2, x 11. 2,3. Caligus pelamydis Kréyer. (p. 57.) 2. Dorsal view, 9, x 22°5 3. Sternal fork, 2 ery PLATE VII ae: =n aS Sal ae, 2 Pirate VITI. Figs. 1, 2. Caligus gurnardi Kroyer. (p. 52.) 1. Dorsal view, g, x 8. (After Kroyer.) 2. Dorsal view, ?, x 8. (After Kroyer.) 3-9. Caligus zei Norman & T. Scott, 9. (p. 54.) . Antennule. . Antenna. . Sternal fork. . First maxilliped. . Second maxilliped. . Foot of fourth pair. 9. Urosome, ¢. 10, 11. Caligus brevicaudatus A. Scott, 2. (p. 56.) 10. Second maxilliped, ¢. 11. Foot of fourth pair, ¢. CO NT o> Ot ® C9 (Figures 8-11 much enlarged.) PLATE VIII Prats IX. Figs. 1-5. Caligus pelamydis Kroyer, 2. (p. 57.) 1. Antennule. 2. Antenna. 3. First maxilliped. 4, Second maxilliped. 5. Foot of fourth pair. 6-9. Pseudocaligus brevipedes (Bassett-Smith). (p. 61.) 6. Sternal fork, ?. 7. Sternal fork, ¢. 8. Second maxilliped, ?. 9. Foot of fourth pair, ?. (Figures much enlarged.) ~ PRIVATE EX Pirate X. Fias. 1,2. Pseudocaligus brevipedes (Bassett-Smith). 1. Dorsal view, ?, x 22 2. Dorsal view, ¢, x 22. 3,4. Lepeophtheirus pectoralis (O. F. Miller). 3. Dorsal view, 9, x 17. 4. Dorsal view, ¢, x 17. (p. 61.) (p. 64.) PLATE X Figs. 1-6. Scizenophilus tenuis P. J. van Beneden, 2. (p. 63.) . Dorsal view (natural size). . Dorsal view (enlarged). . Dorsal view (cephalothorax only). . Ventral view (cephalothorax, right half only). . Mandible. . Caudal rami. Our wnre Pirate XI. (After P. J. van Beneden.) Hy) a Po Zn Ah cae SI! Sh PLATE XI Pratt XII. Fras. 1. Lepeophtheirus nordmann (M. Edwards). (p. 66.) 1. Dorsal view, ?, x 9. 2,3. Lepeophtheirus pectoralis (O. F. Miiller). (p. 64.) 2. Newly hatched nauplius, x 52. 3. “Chalimus” stage, x 26. 4,5. Demoleus paradoxus (Otto). (p. 79.) 4, Ventral view, 2. (After Otto.) 5. Ventral view, ¢. (After Otto.) (Figures 4 and 5 enlarged.) ——————— PLATE XII Pirate XITI. Figs. 1-4. Lepeophtheirus pectoralis (O. F. Miller), 2. (pp. 9-18 and 64. 1. Ventral view, shewing the various appendages and their muscles, x 17. . Dorsal view, shewing the dorsal muscles, x 17. . Ventral view, shewing the alimentary canal and digestive glands, x 17. . Ventral view, shewing the nervous system in situ, Sal — O bo PLATE XII LS l BARES sg : = BPO a Be eal ibe —— + i - >’ ra i = ‘ Ee : 7 ——_~ i Piate XIV. Fies. . 1-10. Lepeophtheirus pectoralis (O. F. Miiller). (pp. 9-18 and 64.) 1. Ventral view, shewing the reproductive organs, oon fon) Ou Go to SS esl Es . Genital segment and abdomen, ?, immature. . Ventral view, shewing the reproductive organs, Si Khe . Longitudinal section of the ovary. . Transverse section through genital segment, ¢, mature. . Transverse section through genital segment, ¢, mature. . Left anterior digestive gland. - Mouth from the anterior surface, shewing the mandibles in situ, and the ducts from the right and left anterior digestive glands. . Spermatophores detached from the genital openings of a female. . Median longitudinal section of the ganglia, shew- ing the “pinhole” cesophagus passing through . between the supra- and sub-cesophageal parts. (Figures much enlarged.) sheet ee. ay Sets rere aiete Kiy 5 PLATE XIV eA pVVS o, CAS ] R&S DPR te eee © Figs. 1-9. Lepeophtheirus pectoralis (O. F. Miller), 2. (pp. 9-18 wWrPore . Nearly median longitudinal section. . Part of transverse section of the intestine. . Horizontal section of the supra-cesophageal gan- . Transverse section of the eyes. . One of the antennules, shewing the nerve endings. . Transverse section in the region of the eyes. . Transverse section in the region of the second © Orr Dow . The nervous system from the ventral aspect. Pirate XV. and 46.) glion, shewing the crossing of the fibres of the optic nerves. Transverse section in the region of the supra- and sub-cesophageal ganglia. maxillipeds. (Figures much enlarged.) PLATE XV Bark gis AS ad REIN Ae tera Prate XVI. Fies. 1-3. Lepeophtheirus pectoralis (O. F. Miller), 2. (p. 64.) 1. Sternal fork. 2. Second maxilliped. 3. Foot of fourth pair. 4-11. Lepeophtheirus nordmanni (M. Edwards), ? & g. (p. 66.) 4. 3 Dorsal view. (This figure after C. B. Wilson.) 5. 9 Antenna. 6. 2 Sternal fork. 7. 9 Second maxilliped. 8. 9 Foot of fourth pair. 9. 2 Sternal fork. 10. *% Second maxilliped. 11. ¢ Foot of fourth pair. (The last three figures are from a second specimen.) RPIATE, oval wy a Ee pt ae Figs. & 9 ae me ; =| BY i ; s Pirate XVII. 1. Caligus diaphanus Nordmann. (p. 60.) 1. Dorsal view, 2, x 13. 2: 2. Lepeophtheirus hippoglosst (Kroyer). 2. Dorsal view, ? immature. 3. Lepeophtheirus thompsoni Baird. (p.. 3. Dorsal view, 2, x 8°75. 4. Lepeophtheirus salmonis (Kroyer). 4. Dorsal view, 9, x 4. 0, 6. Lepeophtheirus pollaee Bassett Sint @. 5. Dorsal view, 2, x 10. 6. Dorsal view, g, x 13. c » Bea’ js PLATE XVII ? f Yr Se ? ~ ¢ j ’ . _ - - + 7 wg = - . in ihe * a — . ‘ ’ 4 fs ’ - { 2 \ p y ~ _ - a; : — = ' =. : Sone Fa i he i. : ' ry “ . a E a é ‘9 Fias. 11, 12. 13-15. 16-19. Piare XVIII. Caligus centrodonti Baird, 2. (p. 50.) 1. Sternal fork. 2. Second maxilliped. 3. Foot of fourth pair. . Caligus labracis T. Scott, 2. (p. 53.) 4, Sternal fork. 5. Foot of fourth pair. . Caligus diaphanus Nordmann, ?. (p. 60.) 6. Second maxilliped. 7. Foot of fourth pair. . Lepeophtheirus hippoglosst (Kroyer), 2. (p. 67.) 8. Sternal fork. 9. First maxilliped. 10. Second maxilliped. Lepeophtheirus salmonis (Kroyer), 2- (p. 71.) 11. Sternal fork. - 12. Foot of fourth pair. Lepeophtheirus pollachw Bassett-Smith, 2. (p. 73.) 13. First maxilliped. 14, Second maxilliped. 15. Foot of fourth pair. Lepeophtheirus sturionis (Kroyer), 2. (p. 74.) 16. Sternal fork. 17. Second maxilliped. 18. Foot of fourth pair. 19. Furcal joints. (Figures much enlarged.) Figs. Pirate XIX. 1-9. Lnitkenia asterodermi Claus, 9. (p. 76.) 10, Elytrophora brachyptera Gerstaecker. 10. 1. Antennule. 2. Antenna. 3. First maxilliped. 4, Second maxilliped. Ds 6 | 8 9, Foot of first pair. }. Foot of second pair. . Foot of third pair. . Foot of fourth pair. Abdomen and furcal joints. Foot of second pair, ¢. 11-18. Phyllothreus cornutus (M. Edwards), ?. 11. 12. 13. 14, 15. 16. ibe 18. Antennule. Antenna. First maxilliped. Second maxilliped. Foot of first pair. Foot of second pair. Foot of third pair. Foot of fourth pair. (Figures much enlarged.) (p. 83.) (p. 92.) ee SS : ———— ‘oS YZ lip) fy ji = ——s eS i e Q, Puate XX. Fias. 1-8. Nogaus ambiguus T. Scott, g. (p. 78.) . Dorsal view, x 13. . Antennule. . First maxilliped. . Second maxilliped. . Foot of first pair. . Foot of second pair. . Foot of third pair. . Foot of fourth pair. 9. Chondracanthus annulatus Olsson. (p. 169.) 9. Lateral view, ¢, x 50. 10. Chondracanthus merluccw (Holten). (p. 180.) 10. Lateral view, g, x -115. ONoobwnre (Figures 2-8 much enlarged.) PLATE XX Plate 21 Prare XXI. Fias. 1. Lepeophtheirus sturionis (Kroyer). (p. 74.) 1. Dorsal view, 2, x 6°6. 2. Pandarus bicolor Leach. (p. 95.) 2. Dorsal view, ¢ (juv.) =Nogagus latus T. Scott, x 15. 3, 4. Cecrops latreillii Leach. (p. 98.) 3. Dorsal view, 2, x 2. 4. Dorsal view, g, x 2. 5. Orthagoriscicola muricata (Kroyer). (p. 100.) 5. Dorsal view, 2, x 2°5. e, PLATE XxXI PLATE XXII. Fias. 1,2. Trebius caudatus Kroyer. (p. 81.) © 1. Dorsal view, 2, x 6°6. 2. Dorsal view, ¢, x 15. 3. Dinemoura producta (O. F. Miller). 3. Dorsal view, 2, x 3°38. : 4, Echthrogaleus coleoptratus (Guérin). 4. Dorsal view, ?, x 4. 5,6. Pandarus bicolor Leach. (p. 95.) 5. Dorsal view, 2, xX 9. 6.Dorsal view, 6, x 10: PLATE XXII 5 b he - ant > = Ae Pi f * é : a how “. _ ps. 4 a 2 7 vac Pa << se | ae ay > -, 3 od a - % we iy »* a Fr - re 7 : + Sy . . : oe a \ Plate 23 Pirate XXIII. Fies. 1,2. Hlytrophora brachyptera Gerstaecker. (p. 83.) . 1. Dorsal view, 2, x 8. 2. Dorsal view, ¢, x 8. 3. Phyllothreus cornutus (M. Edwards). (p. 92.) 3. Dorsal view, 2, x 4°5. A. Liitkenia asterodermi Claus. (p. 76.) 4, Dorsal view, ? (enlarged). 5, 6. Anthosoma crassum (Abildgaard). (p. 108.) 5. Dorsal view, 92, x 3. 6. Ventral view, 2, x 3. PLATE XxXIlll td : = Lay : = . i Ae od f # * te : 5 Plate 24 La 3 } But ad 7 Puate XXIV. Fias. 1,2. Caligus curtus O. F. Miller. (p. 45.) 1. Dorsal view, ?, x 8. 2. Dorsal view, ¢, x 6°5. 3,4. Philorthragoriscus serratus (Kroyer). 3. Dorsal view, 2, x 12:5. 4. Dorsal view, ¢, x 20. (p. 104.) PLAIE XXIV Pirate XXV. Fias. 1-6. Thersitina gasterostet (Pagenstecher), 2. (p. 42.) Antennule. Antenna. Second maxilliped. Foot of first pair. Foot of fourth pair. Abdomen and furceal joints. 7-9. Caligus curtus O. F. Miller, 2. (p. 45.) 7. Sternal fork. 8. Second maxilliped. 9. Foot of fourth pair. 10. Lepeophtheirus thompsont Baird. (p. 69.) 10. Sternal fork, 9. 11-16. Caligus minimus Otto, 2 & & (p. 46.) 11. Antennule, ¢. 12. Sternal fork, °. 13. Sternal fork, é: 14. Second maxilliped, ¢. 15. Foot of fourth pair, ¢. 16. Second maxilliped, ¢. (Figures much enlarged.) PLATE XXV Piare XXVI. Fics. 1-3, Dinemoura producta (O. F. Miller), 9. (p. 86.) 1. Foot of second pair. 2. Foot of fourth pair. 3. Fifth foot. 4-19. Pandarus bicolor Leach, 9 & g. (p. 95.) 4, 9 Antennule. 5. Antenna. — 6. Maxilla. 7. First maxilliped. 8. Second maxilliped. 9. Foot of first pair. 10. Foot of second pair. 11. Foot of third pair. 12. Foot of fourth pair. 13. g Antennule. 14. Antenna. 15. Maxilla. 16. First maxilliped. 17. Second maxilliped. 18. Foot of first pair. 19. Foot of second pair. (Figures much enlarged.) PLATE XXvVI VE Ws}, . N SS f Pratt XXVIII. Fias. 1-8. Dinemowra producta (O. F. Miller), 2. (p. 86.) . Antennule. . . Antenna. . Mandible. . Maxilla. . First maxilliped. . Second maxilliped. . Foot of first pair. . Foot of third pair. 9,10. Cecrops latreilli Leach, 9. (p. 98.) 9. Antenna. COND oe De 10. First maxilliped. 11-24. Philorthragoriscus serratus (Kroyer), ? & 3. (p. 104.) 11. 2? Antennule. 12. Antenna. 13. Mandible. 14. Maxilla. 15. First maxilliped. 16. Second maxilliped. 17. Foot of first pair. 18. Foot of third pair. 19. Foot of fourth pair. 20. Abdomen and furcal joints. 21. ¢ Antenna. 22. Maxilla. 23. Second maxilliped. 24, Foot of second pair. (Figures much enlarged.) ~ é 2 2 < Q, Prare XX VE Fras. 1-7. Cecrops latreillii Leach, ?. (p. 98.) . Antennule. . Second maxilliped. . Foot of first pair. . Foot of second pair. . Foot of third pair. . Foot of fourth pair. . Fifth foot. 8-18. Orthagoriscola muricata (Kréyer), ?. (p. 100.) 8. Antennule. 9. Antenna. 10. Mandible. 11. Maxilla. 12. First maxilliped. 13. Second maxilliped. 14. Foot of first pair. 15. Foot of second pair. 16. Foot of third pair. 17. Foot of fourth pair. 18. Fifth foot. NI OU 0 Ne (Figures much enlarged.) PLATE XXVIII Fe Plate 29 Prate XXIX. Fias. ! 1. Hchthrogaleus liitkent (Norman). (p. 90.) 1. Dorsal view, ¢ (enlarged). 2-5. Lernanthropus kroyert P. J. van Beneden. (p. 110.) 2. Dorsal view, 9, x 13°4. 3. Abdomen and furcal joints, ? (much enlarged). 4. Dorsal view, ¢, x 13:4. 5. Abdomen and furcal joints, @ (much enlarged). PLATE XXIX . ie > , - j e a - ‘ a ' i t oe I — = > “oP = — , i. - if ree ’ . 1 ‘ “oy . “i - 1 : : “s = 3 < 4 Mail: : : : Pirate XXX. Figs. 1-8. Hchthrogaleus liitkent (Norman), g. (p. 90.) . Antennule. . Antenna. . First maxilliped. . Second maxilliped. . Foot of first pair. Foot of second pair. . Foot of third pair. . Foot of fourth pair. 9-17. Lernanthropus kroyeri P. J. van Beneden, ¢. (p. 110.) 9. Antennule with secondary process. © 10. Antenna. 11. Mandible. 12. Maxilla. -13. First maxilliped. - 14. Second maxilliped. ~15. Foot of first pair. ‘ 16. Foot of second pair. 17. Outer ramus of second foot, ¢. CONT Oe Oo DOE (Figures much enlarged.) pa ‘ * Pirate XXXI, Fias. 1-6. Elytrophora brachyptera Gerstaecker, 9. (p. 83.) 1. Antenna. 2. First maxilliped. 3. Second maxilliped. ‘ 4, Foot of first pair. 5. Foot of fourth pair. 6. Antenna, ¢. 7-18. Dichelestiwm oblongum (Abildgaard), 9 & g. (p. 106.) 7. 9 Antennule. 8. Antenna. 9. Mandible. 10. Maxilla. 11. First maxilliped. 12. Second maxilliped. 13. Foot of first pair. 14, Foot of second pair. 15. Foot of fourth pair. 16. ¢ Antenna. 17. Foot of second pair. 18. Foot of fourth pair. (Figures much enlarged.) = W os Fras. Pirate XXXIT. 1-11. Hatschekia mulli (P. J. van Beneden), 9. (p. 114.) pea yee MOOCDMN OOP WH . Adult female, dorsal view, x 24°d. . Lateral view of head and thorax, adult x 36. . Dorsal view, juv., x 36. . Antennule. Antenna. . Spiniform process at base of antenna. Mandible. Maxilla. . Maxilliped. . Foot of first pair. . Foot of second pair. (Figures 4-11 much enlarged.) PLATE XXXII Plate 33 ——. : ‘ yl a ak 2 ay ¢ es fe, a : \ 4 a d Pratt XXXII. er a Fias. 7 ie i . 1. Hatschekia cluthx (T. Scott). (p. 117) 2 1. Dorsal view, 2, x 58. ; a of 2. Hatschekia labracis (P. J. van Beneden). (j x 2. Dorsal view, 2, x- 28. f a 3,4. Hatschekia hippoglossi (Kroyer). (p. 112.) — : 3. Dorsal view, 2, x 7. ae . 4. Dorsal view, 3, x 34. “a9 4 | 5. Thysanote impudica (Nordmann). (p. 187.) he f : ; 5. Dorsal view, 2, x 10. ; ‘ie fe 6. ? Lernzxopoda lampri sp. nov. (p. 202.) | i 6. Lateral view, ¢, x 14. _ = A =) 2. Pee ene Soe Fara * = ee ee Prate XXXIV. Fies. 1-5. Hatschekia cluthe (T. Scott), 2. (p. 117.) 1. Antennule. 2. Antenna. 3. Maxilla. 4. Second maxilliped. 5. Foot of first pair. : 6,7. Hatschekia labracis (P. J. van Beneden), 2. (p. 115.) _ 6. Antennule. 7. Antenna. 8-11. Hatschekia hippoglosst (Kroyer), 2. (p. 112.) 8. Antennule. 9. Mandible. 10. Second maxilliped. 11. Foot of first pair. (Figures much enlarged.) =! ery Pirate XXXV. Fics. 7 1,2. Hatschekia cornigera T. Scott, 2. (p. 118.) 1. Dorsal view, x 40. 2. Lateral view of head and thorax, x 80. 3-7. Hatschekia pygmexa T. Scott, 2. (p. 119.) y 3. Dorsal view, x 45. a 4, Maxilliped. 5. Foot of first pair. 6. Foot of second pair. 7. Abdomen and furcal joints. (Figures 4-7 much enlarged.) + -s 5 atk aie PLATE XXXV Me we . Pirate XXXVI. | Fras. int ns 1-5. Hatschekia cornigera T. Scott, 2. (p. 118.) ae 1. Antennule. 7 2. Antenna. 3. Maxilliped. 4. Foot of first pair. N 5. Foot of second pair. a 6-9. Hatschekia pygmexa'T. Scott, 2. (p.119.) 6. Antennule. 7. Antenna. 8. Mandible. 9. Maxilla. (Figures much enlarged.) La q Prare XXXVI. Fias. : 1. Eudactylina acuta P. J. van Beneden. (p. 126.) 1. Dorsal view, 2, x 41. ie 2,3. Hudactylina acanthii A. Scott. (p. 12835 ‘ 2. Dorsal view, ?, x 41. 3. Lateral view, 2, x 41. ; 4,5. Hudactylina similis T. Scott. (p. 130.) 4. Lateral view, 2, x 34. 5. Lateral view, ¢, x 34. 6,7. Hudactylina minuta T. Scott. (p. 133.) 6. Dorsal view, 2, x 40. | 7. Lateral view, ¢, x 40. Ud = == Cate Fp oe ee a ~ P tect eal rae tata pe Sart + rl ie eee ee “a i ee a ih a? PLATE XXXVII ; Gack: Lave CL eaiae = Epa, PSs TE Tin a eae Bam panne aies o% os Te : (0 6) : ae) F 2 : S | au, f : ’ | nee” Prats XXXVIII. Fias. 1-5. Hudactylina acuta P. J. van Beneden, ?. (p. 126.) 1. Antennule. 2. Foot of first pair. 3. Foot of second pair. 4. Foot of fifth pair. 5. Part of abdomen, and furcal joints. 6-12. Hudactylina acanthw A. Scott, 9. (p. 128.) 6. Antennule. 7. Antenna. 8. Foot of first pair. 9. Foot of second pair. 10. Foot of fourth pair. 11. Foot of fifth pair. 12. Part of abdomen, and furcal joints. (Figures much enlarged.) PLATE XXXVIII ee ee = Plate 39 cae 5 Figs. Pirate XX XIX, 1-17. Hudactylina similis T. Scott, 2? & o. dx . Antenna. . Mandible. . Maxilla. . First maxilliped. 2? Antennule. Second maxilliped. . Foot of first pair. . Foot of second pair. . Foot of fourth pair. . Foot of fifth pair. . Part of abdomen, and furcal joints. . 6 Antennule. . Second maxilliped. . Foot of first pair. . Foot of second pair. . Foot of fourth pair. . Part of abdomen, and furcal joints. (Figures much enlarged.) (p. 130.) Pratt XL. Fics. 1-9. Hudactylina minuta T. Scott, 2. (p. 183.) COON RHO We . Antennule. . Antenna. . First maxilliped. Second maxilliped. Foot of first pair. Foot of second pair. Foot of fourth pair. . Foot of fifth pair. . Part of abdomen, and furcal joints. (Figures much enlarged.) fe BO 4? Lb yp pjA £2 yy 2 lev Ay bere y LLL PLATE XL teal os & eae! Pirate XLI. Fias. 1. Congericola pallida P. J. van Beneden, 2 dorsal view, x 17 pleas 2-4, Chondracanthus depressus T. Scott. (p. 172.) 2. 9 Dorsal view; x 12, 3. Posterior end of body in dorsal view, x 12. 4, Var. oblongus, ? dorsal view, x 12. (p. 173.) 5. Chondracanthus zei De la Roche, 2 dorsal view, x 5. (p. 177.) ; “= 6, Chondracanthus ornatus ‘Il’. Scott, 2 dorsal view, x 10. (p. 182.) ; : ; PLATE XLI ag) Puate XLII. Fics. 1-8. Lernexa branchialis Linn. (p. 142.) 1. Mature female, side view, x 4. 2. Newly hatched nauplius x 51. (p. 21.) 3. Very young female, unfertilized, dorsal view, x 514, 4. (p. 21, . Fertilizedfemale, after leaving the gills of a flounder, dorsal view x 274. (p. 21.) . Mature male, dorsal view, x 284. (p. 21.) . Fertilized female, ‘ Pennella stage,’ just after attach- ment to the gills of a whiting, dorsal view, x 154 (p. 23.) 6a. A ieee stage than fig. 6; the folding has just been completed ; side view, natural size. (p. 23.) ! 7. Apex of the gill-ray of a flounder, normal, x 18. p. 22. 8. Apex of the gill-ray of a flounder, shewing mal- formation caused by the young Lernwa, x 18. (p. 22.) Od Or PLATE XLII Pirate XLITI. Figs. 1-7. Lernea branchialis Linn. (p. 142.) 1. Fertilized female, ventral view, shewing the appen- dages, the reproductive organs, and the nervous system, x 474. (p. 22.) | 2. Mature female, seen from the right side, shewing the maxilliped and four pairs of feet, the alimen- tary canal, and the reproductive organs; from @ specimen cleared in xylol, x 4. (p. 19.) 3. Transverse section through the middle of the swollen — region, shewing the ovary, the oviducts, cement — glands, and intestine, x 9. (p. 21.) 4. Transverse section through the abdomen, x 20. i

-m PLATE I Al er as wa 55 vo Pratt XLIV. . Lernzxa lusci Bassett-Smith, 2 side view, x 6. (p. 144.) 1 2. Another specimen (2) im sttw on gill-arch of fish, x about 2. 3. Lernea minuta, T. Scott, 2 side view, x about 5. (p. 145.) 4. Lernea lumpi, T. Scott, ¢ side view, x about 2. (p. 146.) 5-7. Hemobaphes cyclopterina (Fabr.). (p. 147). 5. Side view (head wanting), x 9. 6. The head, after Steenstrup & Liitken, enlarged. 7. The same, seen from another position, enlarged. 8. Hemobaphoides ambiguus 'T. Scott, 9 side view, x 7. — (p. 148.) PLATE XLIV Ne aa L Pirate XLV. . Rebelula edwardsi (Kolliker), ¢ dorsal view, enlarged. (p. 162.) . Philichthys wiphie Steenstrup, 2. (p. 139.) 2. A young specimen, dorsal view, enlarged. 3. An older specimen, dorsal view, enlarged. . Dichelestium oblongum (Abildgaard). (p. 106.) 4. Dorsal view, 2, x about 4. 5. Dorsal view, ¢, x about 4. . Tripaphylus musteli P. J. van Beneden, ¢ side view, enlarged. (p. 160.) . Chondracanthus ornatus T. Scott, g side view, greatly enlarged. (p. 182.) . Brachiella rostrata Kroyer, g side view, x about 25. (p. 205.) SRO BS, Of AD il ee ee ee PLATE XLV Prats XLVI. Figs. 1-5. Lerneenicus spratte (Sowerby). (p. 156.) 1. Female in situ in eye of sprat, natural size. 2. Female removed from fish, x about 24. 3. Head and neck of female, more enlarged. 4, Antennule, greatly enlarged. 5. Antenna, greatly enlarged. 6-9. Lernxenicus encrafsicola (Turton). (p. 158.) 6. Female im situ in back of sprat, natural size. 7. Shows head of female penetrating into the abdominal cavity of the sprat, enlarged. . Head of female, ventral view, enlarged. . Head, side view, enlarged. CO OO PLATE XIVI PI eee we on Figs. ap Was « Pratt XLVII. Chondracanthus cornutus (O. F. Miiller), 2, (p. 168.) Chondracanthus cornutus, var. 2, x 6. &. Chondracanthus annulatus Olsson, 25% mee Chondracanthus solex Kroyer, 2, x 7. p. av, Chondracanthus flure Kroyer, ¢, x 6. e Wa Chondracanthus clavatus Bassett- Smith, oy e Chondracanthus merluccit (Holten), 2.” x 1 SP it Coe ps PLATE XLVII cr i Figs. . Lepeophtheirus thompson Baird, 2. (p. 69.) 13-16. es 18. . Lepeophtheirus pollachit Bassett-Smith, $. (p. 73.) — . Caligus brevicaudatus A. Scott, ¢. Sternal fork. . Lernxopoda salmonea (Linn.), ¢. (p. 199.) Prate XLVI. 1. Sternal fork. 2. Sternal fork, another form. 3. Foot of fourth pair. 4. Sternal fork. 5. First maxilliped. (p. 56.) . Caligus diaphanus Nordmann, $. Sternal fork. (p. 60.) 8. Antennule. 9. Antenna. 10. Mandible. 11. Maxilla. 12. First maxilliped. Dy Chondracanthus nodosus (O. F. Miller), 2. (p. 176.) 13. Antennule. 4 14. Mandible and maxilla. 15. Foot of first pair. 16. Foot of second pair. Ergasilus nanus P. J. van Beneden, 2. Antenna. (p. 34.) Brachiella insidiosa Heller, adult male, side view x 18. (p. 206.) a (Figs. 1-17 much enlarged.) PLATE XLVIil Figs. 12-16. Pirate XLIX. Tripaphylus musteli (P. J. van Beneden), g. (p. 160.) Be 13. 14. 15. 16. . Antennule. . Mandible. . Maxilla. . First maxilliped. . Second maxilliped. 7. Abdomen. . Thysanote impudica (Nordmann), 2. (p. 187.) 8. 9. 10. > OU 09 DO (?) Lernxopoda lampri sp.n., 3. (p. 202.) 12. Antenna. Antenna. Antennule. Mandible. Mavxilla. First maxilliped. Mandible. Maxilla. First maxilliped. Second maxilliped. (Figures much enlarged.) es S ~ _ 4 A Prats L. Fies. 1-5. Lerneocera cyprinacea (Linn.), 2. (p. 154.) 1. A specimen seen from the side, x 9. 2. The head, front view. 3. The head, seen from another position, more enlarged than fig. 2. 4, A specimen of L. cyprinacea, x 5. (After Selago.) 5. Another specimen, x about 3. (After Baird.) 6-8. Achtheres percarum Nordmann. (p. 193.) 6. A female, dorsal view, x 18. 7. Distal extremity of second maxillipeds, enlarged. 8. A male, dorsal view, x 85. 9. Brachiella bispinosa Nordmann, ? dorsal view, x 7. (p. 211.) (Figs. 1-3 and 6-9 after Nordmann.) IL, Ue —— = re —| lal — ee ee” ee ee Pratt LI. Fics. 1. Tripaphylus musteli (P. J. van Beneden), ?, x 24 (hes wanting). (p. 160.) . Pennella orthagorisci HE. P. Wright, $, about natural s (head wanting). (p. 150.) (Thomas ‘iaven?aaeeel . Sphyrion lumpi (Kroyer), ?, x about 2. (p. 164.) . A smaller specimen, rather imperfect, x about 4. . Rebelula edwardsi (Ko6lliker), 2, x about 2 (hea wanting). (p. 162.) . Thersitina gasterostei (Pagenstecher), 2, x 27. (p. 42. . Clavella lophu (M. Edwards), ?, x 2. (p. 226.) (All the figures shew dorsal view.) Ou ow iw) ~JI o> PEATE Ey Piare LIT. Fias. 1-3. Chondracanthus eae (O. F. Miller). 1. Adult female, dorsal view, x 83. 2. A young specimen, dorsal’ view, x about 3. An adult male, side view, x 80. is 4, Chondracanthus lophii Johnston, %, x an x about 100. (p. 168.) 6. Me tipicasto asellinum (Linn.), ¢ dorsal. 5 (p. 184.) | Figs. 1-4, 5-9. 10%, 12-15. 16-19. Pirate LIT. Chondracanthus cornutus (QO. F. Miller), 2 & 6. (p. 168.) 1. ¢ Antennule. 2. Mandible. 3. & Foot of first pair. 4. Foot of second pair. Chondracanthus cornutus, var., ? & fg. (p. 169.) 5. 2 Antennule. 6. Mandible. 7. 3d Antennule. 8. Foot of first pair. 9. Foot of second pair. Chondracanthus flure Kroyer, 2. (p. 171.) 10. Antennule. 11. Mandible. Chondracanthus solex Kréyer, 2 & g. (p. 170.) | 12. ? Antennule. 13. Mandible. ; 14. ¢@ Antennule. { 15. Foot of second pair. | Chondracanthus merluccti (Holten), 2 & 3. (p. 180.) 16. 2 Antennule. | 17. Mandible. 18. ¢ Foot of first pair. 19. Foot of second pair. 4 (Figures much enlarged.) IBUWINE » IL JN WV VV WY, 0 ZZ | 12 16 eS) Plate 54 Pruate LIV. Fies. 1-11. Trebius caudatus Kréyer, 2. (p. 81.) 1. Antennule. 2. Antenna. 3. Mandible. 4, Maxilla. 5. Sternal fork. 6. First maxilliped. 7. Second maxilliped. 8. Foot of first pair. 9. Foot of second pair. 10. Foot of fourth pair. 11. Fifth foot. 12-17. Charopinus dalmanni (Retzius), ? & g. (p. 189.) 12. 2 Antennule. 13. Antenna. 14. Mandible. 15. Maxilla. 16. First maxilliped. 17. ¢ Second maxilliped. 18-22. Charopinus ramosus Kroyer, ?. (p. 191.) 18. Antennule. 19. Antenna. 20. Mandible. 21. Maxilla. 22. First maxilliped. (Figures much enlarged.) PLATE LIV SSS iy SSS Prats LV. Figs. 1-4. Charopinus dalmanni (Retzius). (p. 189.) 1. Female, dorsal view, x 2. a 2. Female, side view, x 2. 3. Ends of the second maxillipeds, slightly enlarged. 4. Male, side view, x 36. 5. Charopinus dubius T. Scott, 2, dorsal view, x 34.9) (p. 190.) ‘_ 6, 7. Charopinus ramosus Kroyer, 2. (p. 191.) 6. Dorsal'view, x 4. |; 7. Side view, x 4. PLATE LV Fics. . Chondracanthus depressus T. Scott, ¥. (p. 172.) 5-7, Prate LVI. 1. Antennule. 2. Mandible. 3. Foot of first pair. 4. Foot of second pair. Chondracanthus depressus, var. oblongus, 2. (p. 173.) _ 5. Antennule. 6. Foot of first pair. 7. Foot of second pair. . Chondracanthus annulutus Olsson, § & g. (p. 169.) 8. 2 Antennule. 9. Mandible. 10. g Antennule. . Chondracanthus limande Kroyer, 2. (p. 174.) 11. Antennule. 12. Mandible. . Chondracanthus zei De la Roche, ¢. Antennule. (o, a7.) . Chondracanthus clavatus Bassett-Smith, ?. (p. 175.) 14. Antennule. 15. Mandible. . Chondracanthus lophii Johnston, ?. (p. 179.) 16. Antennule. 17. Mandible. 18. Maxilla. (Figures much enlarged.) DLATE LVI ‘ ‘ a 24 » 4 4 i { ‘ % al * . ‘hal ‘ 2 ; \ ’ ’ ee Pm Figs. 1-7. 8-12. 13-17. 18/19; Priatre LVII. Lernxopoda cluthe T. Scott, $ & g. (p. 198.) 1. ¢ Antennule. . Antenna. ; . Mandible. . Maxilla. . First maxilliped. . 6 First maxilliped. Second maxilliped. F Lernwopoda bidiscalis W. F. de Visme Kane, ?. (p. 200.) | 8. Antennule. 9. Antenna. 10. Mandible. 11. Maxilla. 12. First maxilliped. Lernxopoda elongata (Grant), 2. (p. 195.) 13. Antennule. 14, Antenna. 15. Mandible. 16. Maxilla. 17. First maxilliped. Medesicaste usellinum (Linn.), $. (p. 184.) 18. Antennule. 19. Mandible. (Figures much enlarged.) NI OTe G9 LO PLATE Evil th Pirate LVIII. Fas. 1-8. Pandarus bicolor Leach, ¢ (juv.), (= Nogagus lat T. Scott). (p. 95.) . Antennule. . Antenna. . First maxilliped. Second maxilliped. . Foot of first pair. . Foot of second pair. . Foot of third pair. . Foot of fourth pair. 9-15. Lernxopoda galei Kroyer, 2? & g. (p. 197.) 9. ¢ Antennule. 10. Antenna. 11. Mandible. 12. Maxilla. 13. Pest maxilliped. % 14, Seeond maxilliped. © _ 15. g Second maxillgabae - 16. Lernzxopoda cluthe T. Scott, d. (p. 198.) 16. Abdomen and caudal furca. (Figures much enlarged.) > Plate 59 Pratt LIX. Figs. j 1-6. Lerneopoda salmonea (Linn.). (p. 199.) 1. Female, dorsal view, x 12. — 2. The same, side view, x 12. 3. Another specimen, ? adult, dorsal. shew variation). 4. The same, seen from the side, x 8. 5. A female, somewhat immature, dorsal y vie larged. i. = 6. The same, seen from the side, enlarg 7,8. Achtheres percarum Nordmann, ?. (p. 7. Dorsal view, much enlarged. 8. The same, seen from the side. PLATE LIX Pirate LX. Fas. 1-3. Lernexopoda cluthe T. Scott. (p. 198.) 1. Female, dorsal view, x 8. 2. The same, seen from the side, x &. 3. Male, seen from the side, x about 50. 4—6. Lernzeopoda galet Kroyer. (p. 197.) 4, Female dorsal view, x 4. 5. The same, seen from the side, x 4. 6. Male, seen from the side, x about 50. ‘ 7, Brachiella ovalis (Kroyer), seen partly from the side, x about 12. (p. 210.) PLATE DX a See STS ii = = w ; = Plate 61 Prare LX, Figs. : ‘ 1,2. Lerneopoda bidiscalis W. F. de Visme Kane. (p. 200.) 1. Female, dorsal view, x about 6. 4 2. The same, seen from the side, x about 6. 3,4. Lernxopoda elongata (Grant). (p. 195.) 3. Female, dorsal view, x 2°3. 4. The same, seen from the side, x 2°35. 5,6. Lernxopoda similis sp. n. (p. 202.) 5. Female, dorsal view, x 104. 6. The same, seen from the side, x 104. Note.—Vol. I, p. 195, for Plate LXI, figs. 5,6; read figs. 3, 4; and page 202, for Plate LXI, figs. 3, 4; read figs. 5, 6. , PLATE LxI Prate LXIT. Fies. 7 1. Brachiella trigla Claus, ¢, ventral aspect, x 20. (p. 209.) 2. Brachiella insidiosa Heller, 2, side view, x 5. (p. 206.) 3. Brachiella rostrata Kroyer, ?,side view, x 5. (p.205.) — 4,5. Brachiella merluccit Bassett-Smith, 2, x 6. (p. 207.) 4. Dorsal view. 5.° Side view. PLATE LXII oo @ OSs o2& Sw ee Fics. 17-20. 21-25. 26-30. 1. Lernzopoda galei Kroyer, g, abdomen and caudal — . Brachiella rostrata Kroyer, 9 & g. (p. 208.) . Brachiella insidiosa Heller, 2 & g. (p. 206.) Pirate LXITI, furca, OT Co DO 9. 2 Antennule. 10. Antenna. 11. Mandible. \ 12. Maxilla. 13, First maxilliped. 14. ¢ Antenna. 15. First maxilliped. 16. Second maxilliped. Brachiella merluccwi Bassett-Smith, 9. (p. 207.) 17. Antennule. 18. Mandible. 19. Maxilla. 20. First maxilliped. : Brachiella trigle Claus, 2. (p. 209.) 21. Antennule. 22. Antenna. 23. Mandible. 24. Maxilla. 25. First maxilliped. Brachiella ovalis (Kroyer), 2. (p. 210.) 26. Antennule. 27. Antenna. 28. Mandible. 29. Maxilla. 30. First maxilliped. (Figures much enlarged.) PLATE LXill hag thee Py Prare LXIy. Figs. 1-3. Achtheres percarum Nordmann, 2. (p. 193.) 1. Anterior end, ventral aspect, shewing mouth appendages. 2. First maxillipeds, side view. 3. Second maxilliped, side view. 4-6. Brachiella thynni Cuvier. (p. 204.) 4. Male, seen from the side, x 30. 5. Female, scarcely mature, ne wanting, slightly enlarged. 6. Female, adult, x about 3. 7. Brachella parkert G. M. Thomson, ¢, x 84. (p. 212.) 8. Brachiella pastinace P. J. van Beneden, 2, x 10. (p.c2i1.) 9. Brachiella bispinosa Nordmann, 2, x 7, side view; after Nordmann. (p. 211.) (Figs. 1-3 and 9 after Nordmann; 4-6 after Steenstrup & Liitken; 7 and 8 after Miss Bainbridge.) PLATE LXIV v= Uppy y wy Prats LXV. . . Clavella brevicollis (M. Edwards), 2, si 20: .pi2203 vind . Clavella wneinata (O. F. Miiller). (p. 21 2. 9, Side view, x about 7. 3 a3) 6, Side view, x about 45. _ Clavella TUgosa (Kroyer), 9, side view, ‘A male is shewn attached to the cet . Clavella rugosa (Kroyer), ¢, side view, . Clavella (?) wneinata, 2 (juv.), with two m to the abdomen, enlarged. (p. me ; . Clavella dubia, T. & A. Scott, ey a(n Ley) ef . Clavella stellata (Kréyer), 2. (p. 290.) fish to which the adhesive disk attached, x 44. ie. 9. Adhesive disk, enlarged. PEATE TEX ve Plate 66 12-16. 17-20. 21-28. Pratt LXVI. . Clavella rugosa (Kroyer), ¢ & 3. (p. 216.) ? Antennule. . Antenna. . Mandible. . Maxilla. . First maxilliped. . & First maxilliped. Second maxilliped. ET eaten means . Clavella dubia T. & A. Scott, 2. (p. 217.) 8. Antennule. 9. Mandible. 10. Maxilla. 11. First maxilliped. Clavella brevicollis (M. Edwards), 9. (p. 220.) 12. Antennule. 13. Antenna. 14. Mandible. 15. Maxilla. 16. First maxilliped. Clavella emarginata (Kroyer), ?. (p. 218.) 17. Antennule. 18. Mandible. 19. Maxilla. 20. First maxilliped. Clavella uncinata (O. F. Miller), 9. (p. 214.) 21. Antennule. 22. Maxilla. 23. First maxilliped. (Figures much enlarged.) ™ ce 2 CP) Sy (ax) * == ae Pirate LXVILI. Fies. 1-3. Clavella scombri (Kurz). (p. 218.) . 1. Female, side view, x 12. A male is shewn attached to the cephalothorax. 2. Female, in situ on gill-arch of fish, x about 4. 3. Male, side view, x 56. 4—6. Clavella paradowa (P. J. van Beneden). (p. 222.) 4. Female, dorsal view, x about 20. 5. Female, im situ on gill-filament of fish, x 5. 6. Male, side view, x 25. ‘ PLATE LXVII : "Plate 68 Figs. 1-7. Clavella scombri (Kurz), 9 & g. (p. 218.) 8-14. Clavella paradoxa (P. J. van Beneden), ? & Od. (p. 8. 2. 10. 1B 12. 13. 14, ay Oo . Antenna. . Mandible, apex shewing serrated edge. . Maxilla. . First maxilliped. ere Mie MS 5. Clavella quadrata Bassett-Smith, ?, onkargeil (after 2e Smith). (p. 223.) a Prare LXVIII. ? Antennule. 3 First maxilliped. Second maxilliped. 222.) ? Antennule. Antenna. Mandible, apex shewing serrated edge. Maxilla. First maxilliped. 3d First maxilliped. Second maxilliped. (Figures much oulacende ) PLATE LXVIII Prare LXIX, Figs. 1-8. Clavella canthari (Heller). (p. 224.) 1. Female, dorsal view, x 9:3. 2. ''he same, seen from the side, x 9:3. 3. Male, seen from the side, x about 50. 4-6. Clavella alata Brian. (p. 225.) 4. Female, dorsal view, x 15. 5. The same, seen from the side, x 15. 6. Male, seen from the side, x about 50. 7. Clavella emarginata (Kroyer) ¢, side view, x about les oa epee 2 es) 24 Oe a ag eh 4 be ona a i im fete > Ah a ris a sear of. at mee en os 5 ? 3 “ ae \ ane ie eae r. ys tee Pirate LXX. Fies. Yin 1-13. Kroyeria lineata P. J. van Beneden. o 121 1. Female, dorsal view, x about 24. _ 2. Antennule. . Antenna. 3 4. Mandible. 5. Maxilla. 6 7 8 as ; . First maxilliped. . Second maxilliped. . Foot of first pair. 9. Foot of second pair. the side. 11. One of the cephalic spines. 12. Male, dorsal view, x about 24. 18. One of the cephalic spines. (Figures 2-11 and 13 greatly oulaxpaa ' ““tee : : 4 Q Plate 71 Pirate LXXI, Fias. 1-12. Hudactylina imsolens sp.n., 2. (p. 135.) 1. Dorsal view, x 50. 2. Side view, x 50. 3. Antennule. 4. Antenna. 5. Mandible. 6. Maxilla. 7. First maxilliped. 8. Second maxilliped. 9. Foot of first pair. 10. Foot of second pair. 11. Foot of third pair. 12. Foot of fourth pair. 13. Brachiella pastinaca P. J. van Beneden, ?, side view, x a0. ‘(p-241.) c 14. Caligus pelamydis Kroyer, g, dorsal view, x 24. (p. 58.) 4 (Figures 3-12 greatly enlarged.) Note.—Fig. 13 is not referred to in the text, as the specimen was only recently obtained. PLATE LXXI Plate 72 Pres XT: Fias. 1-10. Argulus foliaceus (Teint. >. fas 227.) 1. Female, dorsal view, enlarged about 64 times. 2. Antenna. 3. Antennule. 4. Mouth, side view. 5. Siphon with retractile stylet. 6. Second maxilliped. 7. First swimming foot. 8. Basiopodite of second foot. 9. Basiopodite of third foot. 10. Basiopodite of fourth foot. (Figures 2-10 much enlarged.) PLATE LXXI RAY SOCIHTY INSTITUTED 1844 FOR THE PUBLICATION OF WORKS NATURAL HISTORY ANNUAL SUBSCRIPTION ONE GUINEA ON OFFICERS AND COUNCIL. 1915-14. TT TT President. Tur Rr. Hon. LORD AVEBURY, P.C., D.C.L., LL.D., For.Src.R.A., E.R.S., F.S.A., F.L.S., Ere. Vice- Presidents. T. A. CHAPMAN, M_D., F.Z.8., F.E.S. A. D. MICHAEL, F.LS., F.Z.S., F.R.MLS. R. F. SCHARFF, Pu.D., B.Sc., F.L.S., F.Z.S. Council. Ropert ADKIN, F.E.S. B. Daypon Jackson, Pu.D., F.L.S. R. AssHeton, M.A., F.L.S., F.G.S. ALBERT H. Jonzs, Treas.E.S. Matcoum Burr, D.S8c., F.L.S.,F.G.S. | G. B. Lonastarr, M.D., F.E.S. Rev. C. RB. N. Burrows, F.E.S. A. W.Oxg, B.A., LL.M., F.L.S., F.G.S. Rev. ALFRED Futumr, M.A., F.E.S. CHARLES OLDHAM, F.L.S., F.Z.S. A. E. Gipss, F.L.S., F.Z.S., F.E.S. C. D. Soar, F.L.S., F.R.M.S. S. F. Harmer, M.A., Sc.D., F.R.S. W. Marx Wess, F.L.S., F.R.MS. Greasurer. F. DuCANE GODMAN, D.C.L., F.R.S., F.LS., F.G.S., F.Z.8., F.E.S. Secretary. 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