ohL REPORT OF THE CANADIAN ARCTIC EXPEDITION 1913-18 VOLUME VII: CRUSTACEA PART L: PARASITIC COPEPODA By CHARLES BRANCH WILSON SOUTHERN PARTY, 1913-16 OTTAWA THOMAS MULVEY PRINTER TO THE KING'S MOST EXCELLENT MAJESTY 1920 J^-- Issued August 6th 1920 Report of the Canadian Arctic Expedition, 1913-18. VOLUME VII: CRUSTACEA Part A: DECAPOD CRUSTACEANS. By Miss Mary J. Rathbun. (Issued August 18, 1919). Part B: SCHIZOPOD CRUSTACEANS. By Waldo L. Schmitt. (Issued September 22, 1919). Part C: CUMACEA. By W. T. Caiman (In press). Part D: ISOPODA. By Miss P. L. Boone (In press). Part E: AMPHIPODA. By Clarence R. Shoemaker (Issued 1920). Part F: PANTOPODA. By Leon J. Cole (In press). Part G: EUPHYLLOPODA. By Frits Johansen (In preparation). Part H: CLADOCERA. By Chancey Juday (Issued July 23, 1920). Part I: OSTRACODA. By R. W. Sharpe (In preparation). Part J: FRESHWATER COPEPODA. By C. Dwight Marsh (Issued April VI, 1920). Part K: MARINE COPEPODA. By Arthur Willey (Issued June 25, 1920). Part L: PARASITIC COPEPODA. By Charles B. Wilson (In press). Part M: CIRRIPEDIA. By H. A. Pilsbry (In preparation). REPORT OF THE CANADIAN ARCTIC EXPEDITION 1913-18 VOLUME VII: CRUSTACEA PART L: PARASITIC COPEPODA By CHARLES BRANCH WILSON SOUTHERN PARTY, 1913-16 OTTAWA THOMAS MULVEY PRINTER TO THE KING'S MOST EXCELLENT MAJESTY 1920 Issued August 6th 1920 Report on the Parasitic Copepoda collected during the Canadian Arctic Expedition, 1913-18. By CHARLES BRANCH WILSON, D.Sc., PH.D. State Normal School, Westfield, Massachusetts. While the parasitic copepods collected by Mr. Frits Johansen during the Canadian Arctic Expedition do not include any forms new to science, they are still of peculiar scientific interest for two reasons. The first of these has already been stated in connection with both the fresh-water copepods and the free swimming marine forms, namely the fact that they were collected in a region hitherto practically unexplored for such crustaceans. The present author has reported a few species collected by Alaskan and Siberian fishermen and presented to the United States National Museum; but they were nearly all marine forms and included only a few straggling specimens from the Salmonidae that spawn in fresh water. The present collection supplements these in a very decisive manner and indicates that the genus Salmincola is as well represented in the polar as in temperate regions. In fact we are now justified in concluding that these crustacean parasites are as widely distributed as their fish hosts, and wherever the hosts are found we may well expect to discover also the copepods which infest them. LERNAEOPODID^E. Salmincola gibber (Wilson). From mouth of salmon, Port Clarence, Alaska, Station 20 d. From tongue and gills of Salvelinus malma at Bernard harbour, Dolphin and Union strait, Northwest Territories, Station 41 v. From mouth of Salvelinus malma, Bernard harbour, Dolphin and Union strait, Northwest Territories, Station 49 p. Salmincola siscowet (Smith). ' From tips of gill filaments of Salvelinus malma at Bernard harbour, North- west Territories, Station 37 h. Same host and locality, but Station 37 v (lake). From tips of gill filaments of Cristivomer namaycush at Bernard harbour, Northwest Territories, Station 40 / (lake). Same host and locality, but Station 40 g. Same host and locality, but Station 40 i. From tailfin of Cristivomer namaycush at Bernard harbour, Northwest Territories, Station 40 o (lake). Salmincola falculata (Wilson). From mouth of Salvelinus malma at Bernard harbour, Northwest Territories, Station 37 v (lake). Same host and locality, but Station 49 m (Dolphin and Union strait, North- west Territories). 75870— 1J 4 L Canadian Arctic Expedition, 1918-18 LERNAEID^). Haemobaphes cyclopterina (Miiller). Among fish remains found in the stomach of Phoca hispida Schreber, captured at Collinson point, Alaska, Station 27 j. Amother specimen was obtained from the gills of Coitus (Myoxocephalus) scorpioides in Hudson strait, Northwest Territories, September, 1897, by the Diana Expedition under Messrs. Low and Wakeham, and has been identified by the present author. HERPYLLOBIID^E. Selioides bolbroei Levinsen. Cat. No. 1213. On the back of two Polynoids, Actinoe sarsi Kinberg, outer part of Bernard harbour, Dolphin and Union strait, in 3 fathoms of water, Station 41, July 20, 1915. This species was described and figured, but not named, by Dr. R. Horst in 1878, in a paper entitled "Ueber zwei neue Schmarotzerkrebse" published in Tijdschrift der Nederlandsche Dierkundige Vereeniging, vol. 4, p. 51-55, pi. III. He had but a single female specimen which was taken from the annelid, Polynoe rarispina in the North Sea, and it was ruined before he had completed his examination of it. But the figure of the ventral surface, which he published, leaves no doubt of its identity. On May 15 of the same year (1878) G. M. R. Levinsen published a paper "Om nogle parasitiske Krebsdyr, der snylte hos Annelider," Vidensk. Meddel. Natur. Foren., Copenhagen, 1877 (1878), p. 351-380; pi. 6, fig. 1-22. After giving a list of the species previously found upon Annelids, he described a new genus and species, to which he gave the name Selioides bolbroei. The specimens were found upon the Annelid Harmothoe imbricata (Linnaeus) on the coast of Greenland, and included both sexes, the females with fully developed egg strings. This is identical with the species figured by Horst and with the present specimens, and is especially noteworthy for two reasons. The swimming legs are all uniramose; those of the first and third pairs are widely separated and close to the lateral margins of the cephalothorax, while the third pair have their basal joints fused across the midline. The egg strings are attached to the sides of the genital segment not by their ends, as is the usual mode, but by the centre of one of the lateral margins. In consequence, as much of the egg string projects forward alongside the thorax as backward alongside the abdomen. Levinsen found upon Polynoe cirrosce Pall, a single specimen of a second species of this same genus, whose egg strings possessed the added peculiarity of each being four-lobed. He did not name this species because he had but a single mutilated specimen. The presence of this genus in North West Canada, here recorded, and the occurrence of another species of the genus in the Antarctic ocean, recorded below, suggest that there are likely to be many other new forms, when the Annelids of these regions become better known. In view of the increased interest recently shown in the biology of the Arctic and Antarctic regions, and the noteworthy discoveries which have been made, it does not seem out of place to publish a list of the parasitic copepods which have thus far been reported from these regions. One hundred and forty years ago (1780) Otto Fabricius compiled the first list of this kind, which he called "Fauna Grcenlandica," and which, of course, was restricted to the one area mentioned. Fabricius was chaplain at Frederiks- haab, Greenland, for six years, and most of the species he mentioned were obtained from Kvanefjord, which is near by. They included one species referred to the old genus Binoculus, one Cyclops and seven Lernseans. Not one of the entire number is known to-day by the name given to it in Fabricius' list. Parasitic Copepoda 5 L Kr^yer was the next to present a " Conspectus Crustaceorum Groenlandise 't in the Naturhistorisk Tidsskrift, vol. 2, 1838-39, p. 249. This portion did not include any copepods, but the second and third portions published in Danske Videns. Selskab. Natur. og Math. Afhand., vol. 7, 1839, included both free swimming and parasitic forms, but only a few species. In 1857 H. Rink published in Copenhagen a volume entitled "Gr<£nland geographisk og statistisk beskrevet," to which various authors contributed. The Natural History supplement contained (p. 28-49) a list of Greenland Crustacea, Annelids and Worms by J. Th. Reinhardt. In 1875 T. R. Jones published in London a similar " Manual of the Natural History, Geology and Physics of Greenland and the Neighbouring Regions." In the Appendix, p. 146-165, appeared a list of the Crustacea of Greenland by Chr. Liitken, which embraced both free swimming and parasitic forms. And finally, in 1913, K. Stephensen presented in the Meddelelser om Gr^nland, vol. 22, a " Conspectus Crustaceorum et Pycnogonidorum Groelandise," which included all that had previously appeared and added many new species. These publications were concerned with the fauna of a single country which had been studied far more often and in greater detail than any other portion of the polar regions. But there have also been the reports of numerous expeditions sent by the various nations of the world either to the North or the South Polar regions. Great Britain, the United States, Norway, Sweden, Denmark and Germany have all taken part in these polar explorations and each has contributed its quota to our knowledge of their fauna and flora. And there have been a few reports on collections made by private individuals or by various museums. From all of these the following list has been compiled. Probably it could be augmented by some of the species found in northern Norway and Sweden, if their geographical distribution were sufficiently known. The Kara Sea and the Murman Coast also suggest promising possibilities, but while the Russian author, Birula, has written several papers upon the Decapod Crustacea from those localities and from Spitzbergen, practically no attention at all has been given to the parasitic copepods. As here given the list includes 28 Lernseopodoida, 20 Monstrilloida, 18 Caligoida, 11 Notodelphyoida and 2 Harpacticoida, all the groups which possess any parasitic forms being represented. There are also two species which cannot be referred to any of the groups with certainty or even probability. The name Lernseopodoida has been substituted for the group designated as Lernseoida by Sars in 1901, in accordance with a suggestion made by Rev. T. R. R. Stebbing in his General Catalogue of South African Crustacea, published in the Annals of the South African Museum, vol. 6, 1910, p. 561. The life history of the genus Lerncea as given by the present author in Bulletin U.S. Bureau of Fisheries, vol. 35, 1917, p. 165-198; pi. 6-15, shows conclusively that this genus and the family Lernaeidse belong to the Caligoida. Hence the name cannot be used to designate another of the groups or divisions. PARASITIC COPEPODS FROM POLAR REGIONS. COPEPODA LERNSEOPODOIDA. Chondracanthus cornutus (Muller). Lerncea cornuta, MULLER, 0. F. "Zoologiae Danicse Prodromus," 1776, p. 227. Chondracanthus cornutus, LUTKEN, CH. "The Crustacea of Greenland." T. R. Jones' Manual of Greenland, 1875, Appendix, p. 162. Found on the gills of various flounders on the coasts of Greenland and Labrador. GL Canadian Arctic Expedition, 1913-18 Chondracanthus nodosus (Muller). Lerncea nodosa, FABRICIUS, OTHO. "Fauna Grcenlandica," 1780, p. 341; no. 331. Chondracanthus nodosus, LUTKEN, CH. "The Crustacea of Greenland." T. R. Jones' Manual of Greenland, 1875, p. 162. Found on the gills of Sebastes norvegicus (Cuv. & Val.), on the Greenland coast. Chondracanthus radiatus (Muller). Lerncea radiata, FABRICIUS, OTHO. " Fauna Groenlandica," 1780, p. 340; no. 330. Chondracanthus radiatus, LUTKEN, CH. "The Crustacea of Greenland. " T. R. Jones' Manual of Greenland, 1875, p. 162. Found on the gills of Coryphcenoides rupestris (Gunner), on the coast of Greenland. Clavella agilis (Kr^yer). Anchorella agilis, VANHOFFEN, E. "Crustaceen." Drygalski, Gronland Expedition der Gesellschaft fur Erdkunde zu Berlin, 1891-93, 1897, vol. 2, p. 280. Found on the skin between the fin rays of Gadus agilis Reinhardt, on the coast of Greenland. Clavella canaliculata Wilson. Clavella canaliculata, WILSON, C. B. "The Lernaeopodidse." Proc. U. S. Nat. Museum, vol. 47, 1915, p. 675; pi. 46, fig. 149-151. Taken from the pectoral fin of a tomcod, Microgadus proximus (Girard), on the coast of Alaska. Clavella irina Wilson. Clavella irina, WILSON, C. B. "The Lernaeopodidse." Proc. U. S. Nat. Museum, vol. 47, 1915, p. 685; pi. 49, fig. 177-181. Found in the gill cavity of Gadus macrocephalus Tilesius, from the Alaskan coast. Clavella perfida Wilson. Clavella perfida, WILSON, C. B. "The Lernseopodidae." Proc. U. S. Nat, Museum, vol. 47, 1915, p. 672; pi. 45, fig. 140-143. Found on the gills of Theragra chalcogramma (Pallas), from the coast of Alaska. Clavella recta Wilson. Clavella recta, WILSON, C. B. "The Lernseopodidse." Proc. U. S. Nat. Museum, vol. 47, 1915, p. 684; pi. 50, fig. 183-184. From the dorsal and caudal fins of Sebastodes melanops (Girard), on the Alaskan coast, Clavella stichaei (Kryer). Anchorella stichcei, KR<£YER, H. "Snyltekrebsene." Naturhistorisk Tidsskrift' ser. 3, vol. 2, 1863, p. 298; pi. 16, fig. 1, a-g. Anchorella stichcei. STEPHENSEN, K. "Gr^nlands Krebsdyr." Meddel. om Greenland, vol. 22, 1913, p. 339. Obtained from the pectoral fins of Stichceus punctatus (Fabricius), on the coast of Greenland. Clavella uncinata (Muller). Lerncea uncinata, FABRICIUS, OTHO. "Fauna Grcenlandica," 1780, p. 338; no. 328. Parasitic Copepoda 7 L Anchorella uncinata, STEPHENSEN, K. "Gr<£nlands Krebsdyr." Meddel. om Greenland, vol. 22, p. 338. 1913. Found upon the gills of Gadus ogac Richardson, and Gadus callarias Linnaeus, on the coast of Greenland. Clavellodes intermedia (Quidor). Anchorella intermedia, QUIDOR, A. "Sur les Copepodes recueillis par la mission Jean Charcot dans les mers antarctiques." Bull. Mus. d'Hist. Nat., 1906, p. 29; pi. 3, fig. 37-44. Found in the mouth of a species of Nothostenia in the Antarctic ocean. Clavellodes rugosa (Kr^yer). Anchorella rugosa, STEPHENSEN, K. "Gr^nlands Krebsdyr." Meddel. om Gr0nland, vol. 22, 1913, p. 338. Found on the gills of Anarrhichas minor Olafsen, and A. lupus Linnaeus, on the Greenland coast. Diocus gobinus (Miiller). Lerncea gobina, FABRICIUS, OTHO. " Fauna Groenlandica," 1780, p. 339; no. 329. Lerncea (Chondracanthus, Cuv.) gobina, KR<£YER, H. "Snyltekrebsene." Naturhistorisk Tidsskrift, vol. 1, 1835, p. 280; pi. 2, fig. 8; pi. 3, fig. 12, a-d. Diocus gobinus, STEENSTRUP & LUTKEN. "Snyltekrebs og Lernseer." Kongl. Danske Vidensk. Selsk. Skrifter, ser. 5, vol. 5, 1861, p. 423; pi. 15, fig. 39, a-d. Found in the gill cavity and on the under surface of the Greenland sculpin, Gymnocanthus tricuspis (Reinhardt), and sufficiently abundant to have received a common name from the local fishermen. Eubrachiella antarctica (Quidor). Brachiella antarctica, QUIDOR, A. " Copepodes recueillis par la mission Jean Charcot dans les mers antarctiques." Bull. Mus. d'Hist. Nat., Paris, 1906, p. 30; pi. 3, fig. 45-48. From the gills of Dissostichus eleginoides, an antarctic fish. Eubrachiella gaini (Quidor). Brachiella gaini, QUIDOR, A. Deuxieme Expedition Antarctique Franchise. " Copepodes Parasites.'' Sci. Nat.; Documents scient., 1912, p. 211; pi. 2, fig. 24; pi. 3, fig. 27. , From the gills and gill cavity of a species of Trematodus, an antarctic fish. Lernaeopoda elongata Grant. Lernceopoda elongata, MIERS, E. J. "On a small collection of Crustacea made by Edward Whymper, Esq., chiefly in the N. Greenland Seas." Jour. Linn. Soc., vol. 15, 1880, p. 71. Lernceopoda elongata, STEPHENSEN, K. "Gr^nlands Krebsdyr." Meddel. om Greenland, vol. 22, 1913, p. 336. Found attached to the eye of various Greenland sharks. Lernaeopoda sebastis Kn/>yer. Lernceopoda sebastis, KR<£YER, H. "Snyltekrebsene." Naturhistorisk 8L Canadian Arctic Expedition, 1913-18 Tidsskrift, ser. 3, vol. 2, 1863, p. 279; pi. 17, fig. 7, a-h. From the gill cavity of Sebastes norvegicus (Cuv. & Val.), from the Greenland coast. Naobranchia occidentalis Wilson. Naobranchia occidentalis, WILSON, C. B. "The Lernaeopodidse." Proc. U. S. Nat. Museum, vol. 47, 1915, p. 663; pi. 44, fig. 136-139. From the gills of Gadus macrocephalus Tilesius, from the coast of Alaska. Parabrachiella rostra ta (Kr<£yer). Brachiella rostrata, STEPHENSEN, K. "Gr<£nlands Krebsdyr." Meddel. om Greenland, vol. 22, 1913, p. 338. From the gills of the halibut, Hippoglossus hippoglossus (Linnaeus), on the Greenland coast. Probrachiella anserina (Wilson). Brachiella anserina, WILSON, C. B. "Parasitic Copepocls of the Pacific Coast." Proc. U. S. Nat. Museum, vol. 35, 1908, p. 467; pi. 78-79. From the gill cavity of the rockfish, Sebastodes glaucus (Hilgendorf) taken at Bering island, Siberia. Salmincola arcturi (Miers). Lernaeopoda arcturi, MIERS, E. J. "Crustacea." Nares, Narrative of a Voyage to the Polar Sea, 1875-76," Appendix, no. 7, p. 240. From the gills of Salmo arcturus Giinther, from the Greenland coast. Salmincola bicauliculata (Wilson). Lernaeopoda bicauliculata, WILSON, C. B. "Parasitic Copepods of the Pacific Coast." Proc. U. S. Nat. Museum, vol. 35, 1908, p. 472; pi. 82. From the gills of the Dolly Varden trout, Salvelinus malma (Walbaum), at Bering island, Siberia. Salmincola carpionis (Kr^yer). Lernaeopoda carpionis, KR<£YER, H. "Snyltekrebsene." Naturhistorisk Tidsskrift, vol. 1, 1837, p. 268; pi. 2, fig. 6. Lernaeopoda carpionis, STEPHENSEN, K. "Gr^nlands Krebsdyr." Meddel. om Grnland, vol. 22, 1913, p. 337. From the mouth and gills of Salmo carpio Fabricius, on the Greenland coast. Salmincola extumescens (Gadd). Lernaeopoda extumescens, WILSON, C. B. "Parasitic Copepods of the Pacific Coast." Proc. U. S. Nat. Museum, vol. 35, 1908, p. 475. From the gill cavity of the hump-backed whitefish, Coregonus nelsonii Bean, in the Yukon river, Alaska. Salmincola gibber (Wilson). Lernaeopoda gibber, WILSON, C. B. "Parasitic Copepods of the Pacific Coast." Proc. U. S. Nat. Museum, vol. 35, 1908, p. 469; pi. 80. From the gills of the Dolly Varden trout, Salvelinus malma (Walbaum), ort the coast of Alaska. Salmincola inermis (Wilson). Lernaeopoda inermis, WILSON, C. B. "The Lernaeopodidse." Nat. Museum, vol. 47, 1915, p. 614; pi. 32, fig. 47-51. Proc. U. S. Parasitic Copepoda 9 L From the gills of the hump-back whitefish, Coregonus nelsonii Bean, in the Yukon river, Alaska. Salmincola siscowet (Smith). Salmincola siscowet, WILSON, C. B. "The Lernaeopodidav" Proc. U. S. Nat. Museum, vol. 47, 1915, p. 608; pi. 30, fig. 23-29. Three females belonging to this species were taken from the mouth of Salyelinus alpinus alipes (Richardson), at Etah, Greenland, and are now in the United States National Museum, Cat. no. 49767. Sphyrion lumpi (Kr<£yer). Sphyrion lumpi, STEPHENSEN, K. "Gr<£nlands Krebsdyr." Meddel. om Gr^nland, vol. 22, 1913, p. 340. From the fins of the lumpfish, Cyclopterus lumpus Linnaeus, on the Greenland coast. COPEPODA MONSTRILLOIDA. Bactropus cystopomati Gravier. Bactropus cystopomati, GRAVIER, C. "Sur un type nouveau' de Crustace parasite d'un Serpulien de TAntarctique sud-americaine." Bull, du Mus. Hist. Nat., Paris, vol. 18, 1912, p. 67; 1 text figure. Bactropus cystopomati, GRAVIER, C. Deuxieme Expedition Antarctique Francaise. "Crustaces Parasites." Expedition Charcot, p. 55; text figs. 42-52. 1912. Taken from the abdominal portion of the digestive tube of a new Serpulid Polychaete, Cystopomatus macintoshi Gravier, from Petermann island, Antarctic ocean. Choniostoma hanseni Giard & Bonnier. Choniostoma hanseni, GIARD, A. & BONNIER, J. " Contributions a 1'etude des Epicarides." Bull. Sci. France et Belgique, vol. 25, 1895, p. 479. Found on Spirontocaris polaris (Sabine) in the Kara Sea. Choniostoma hanseni, VANHOFFEN, E. "Crustaceen." Drygalski, Gronland Expedition der Gesellschraft fur Erdkunde zu Berlin, 1891-93, 1897, vol. 2, p. 281. Found in the gill cavity of two Greenland shrimps, Spirontocaris gaimardii (H. M. Edwards) and Sp. polaris (Sabine). Choniostoma mirabile Hansen. Choniostoma mirabile, HANSEN, H. J. "Oversigt over de paa Djimphna Togtet indsamlede Krebsdyr." Djimphna-Togtets zoolog.-bot. Udbytte, 1886, p. 271; pi. 24, fig. 7 a-h. Choniostoma mirabile, GIARD, A. & BONNIER, J. "Contributions a 1'Etude des Epicarides." Bull. Sci. France et Belgique, vol. 25, 1895, p. 479. Found in the gill cavity of the shrimp, Spirontocaris gaimardii (H. M. Edwards), in the Kara sea. Crypsidomus terebellae Levinsen. Crypsidomus terebellce, LEVINSEN, G. M. R. "Om nogle parasitiske Krebsdyr, der snylte hos Annelider." Vidensk. Meddel. Naturh., Kj<£benhavn, 1878, p. 375; pi. 6, fig. 19-20. Found on the Annelid Thelepus cincinnatus Fabricius, on the coast of Greenland. The name Crypsidomus was used by Giinther for a genus of reptiles in 1864, and by Ausserer for a genus of arachnids in 1871, both of which are prior to the 10 L Canadian Arctic Expedition, 1913-18 appearance of Levinsen's paper in 1878. Hence it cannot stand for a copepod genus, and in its place is suggested the name Aphanodomus, from 'Aavrjs hidden and 8d»vs house, meaning dwelling in secret places, and thus having the same significance as Crypsidomus. Eurysileniopsis sarsi Gravier. Thylacoides sarsi, GRAVIER, CH. "Sur un nouveau genre Crustace" parasite d'un Syllidien de 1'Antarctique sud-ame*ricaine (Thylacoides, nov. g., sarsi, nov. sp.)." Bull. Mus. d'Hist. Nat., Paris, 1912, p. 71, 2 text figs. Eurysileniopsis sarsi, GRAVIER, CH. Deuxi&me Expedition Antarctique Franchise. "Crustaces Parasites." Sci. Nat.; Documents scient., 1912, p. 51; text figs. 33-41. Found on the back of Trypanosyllis gigantea (Macintosh), an antarctic annelid. Eurysilenium oblongum Hansen. Eurysilenium oblongum, HANSEN, H. J. "Oversigt over de paa Djimphna Togtet indsamlede Krebsdyr." Djimphna-Togtets .zool.-botan. Udbytte, 1886, p. 82 (264) ; pi. 24, fig. 1-10. Found on the annelid Harmothoe badia Theel, from the Kara sea. Herpyllobius affinis Hansen. Herpyllobius affinis, HANSEN, H. J. Oversigt over de paa Djimphna Togtet indsamlede Krebsdyr." Djimphna-Togtets zool.-bot. Udbytte, 1886, p. 81 (263); pi. 24, fig. 2. Herpyllobius affinis, GIARD, A. & BONNIER, J. "Contributions a 1'Etude des Epicarides." Bull. Sci. France et Belgique, vol. 25, 1895, p. 480. Found on Harmothoe badia Theel, an annelid from the Kara sea. Herpyllobius arcticus Steenstrup & Liitken. En ny . . . Lernaea, KR^YER, H. "Gr^nlands Amfipoder." Kongl. Danske Vidensk. Selsk. math.-naturvid. Afhand., vol. 7, 1838, p. 321; no. 58. Silenium polynoes, KR^YER, H. "Snyltekrebsene." Naturhistorisk Tidsskrift, ser. 3, vol. 2, p. 403; pi. 18, fig. 6, a-g. 1863. Herpyllobius arcticus, STEENSTRUP, J. & LUTKEN, CH. "Snyltekrebs og Lernaeer." Kongl. Danske Videns. Selsk. Skrifter, ser. 5, vol. 5, 1861, p. 426; pi. 15, fig. 40. Herpyllobius arcticus, LEVINSEN, G. M. R. "Om nogle parasitiske Krebsdyr, der snylte hos Annelider." Vidensk. Meddel. Naturh. Foren., Kjoben- havn/1878, p. 363; pi. 6, fig. 12-18. Herpyllobius arcticus, JENSEN, S. "Nogle Oplysninger om . . . Her- pyllobius arcticus." Oversigt Kongl. Danske Vidensk. Selsk. Forhand., 1900, p. 84; pi. 1, fig. 8-9; pi. 2, fig. 10-18. Herpyllobius arcticus, STEPHENSEN, K. "Gr0nlands Krebsdyr." Meddel. om Gr^nland, vol. 22, 1913, p. 343. Found on the outside surface of Harmothoe imbricata (Linnaeus) , Harmothoe spinosa Kinberg, Harmothoe gourdoni Gravier, Enipo rhornbigera Ehlers, Polynoe cirrata Fabricius, Polynoe scabra Oersted, Nychia amondseni Malmgren, arctic annelids found in the Kara sea and on the Greenland coast. Saccopsis terebellidis Levinsen. Saccopsis terebellidis, LEVINSEN, G. M. R. "Om nogle parasitiske Krebsdyr, der snylte hos Annelider." Vidensk. Meddel. Naturh. Foren., Kjobenhavn, 1878, p. 374; pi. 6, fig. 21-22. Parasitic Copepoda L ] 1 Saccopsis terebellidis, GIARD, A. & BONNIER, J. "Contributions a 1'Etude des Epicarides." Bull. Sci. France et Belgique, vol. 25, 1895, p. 481. Saccopsis terebellidis, STEPHENSEN, K. "Gr<£nlands Krebsdyr." Meddel. om Gr^nland, vol. 22, 1913, p. 343. Saccopsis terebellidis, STEPHENSEN, K. " Zoogeographical Investigation in Southern Greenland." Meddel. om Greenland, vol. 53, 1916, p. 305. Found on Terebellides stroemii Sars and Leucariste arcticus Sars, Greenland annelids. Selioides bolbroei Levinsen. Selioides bolbroei, LEVINSEN, G. M. R. "Om nogle parasitiske Krebsdyr, der snylte hos Annelider." Vidensk. Meddel. Naturh. Foren., Kj<£benhavn, vol. 31, 1878, p. 353; pi. 6, fig. 5-11. From the outer surface of Harmothoe imbricata (Linnaeus), a Greenland annelid, Selioides tardus Gravier. Selioides tardus, GRAVIER, CH. Deuxieme Expedition Antarctique Franchise. "Crustaces Parasites." Sci. Nat.; Documents scient., 1912, p. 43; text figs. 19-32. From the outside surface of Hermadion rouchi Gravier, an antarctic annelid. Sphaeronella acanthozonis Hansen. Sphceronella acanthozonis, HANSEN, H. J. "The Choniostomatidae." Copenhagen, 1897, p. 141; pi. 7, fig. 5, a-d. In the marsupium of Acanthozone cuspidata (Lepech) from the Kara sea. Sphaeronella argissae Hansen. Sphceronella argissce, HANSEN, H. J. "The Choniostomatidse." Copen- hagen, 1897, p. 123; pi. 4, fig. 3, a-n. From the marsupium of Argissa typica Boeck, a Greenland amphipod. Sphaeronella bonnieri Hansen. Sphceronella bonnieri, HANSEN, H. J. "The Choniostomatidse." Copen- hagen, 1897, p. 136; pi. 6, fig. 4; pi. 7, fig. 1. From the marsupium of Protomedeia fasciata Kr<£yer, a Greenland amphipod. Sphaeronella curtipes Hansen. Sphceronella curtipes, HANSEN, H. J. "The Choniostomatidae." Copen- hagen, 1897, p. 164; pi. 10, fig. 2, a-g. From the marsupium of Janira spinosa Harger, a Greenland isopod. Sphaeronella decorata Hansen. Sphceronella decorata, HANSEN, H. J. "The Choniostomatidae." Copen- hagen, 1897, p. 150; pi. 8, fig. 3; pi. 9, fig. 1. From the marsupium of Diastylis rathkei (Kr<£yer), a Greenland cumacean. Sphaeronella holboelli Hansen. Sphceronella holboelli, HANSEN, H. J. "The Choniostomatidae." Copen- hagen, 1897, p. 127; pi. 5, fig. 2, a-g. From the marsupium of Paramphithoe boeckii Hansen, a Greenland amphipod. Sphaeronella metopae Hansen. Sphceronella metopce, HANSEN, H. J. "The Choniostomatidse." Copen- hagen, 1897, p. 125; pi. 4, fig. 4; pi. 5, fig. 1. From the marsupium of Metopa bruzelii (Goes), a Greenland amphipod. 12 L Canadian Arciic Expedition, 1913-18 Sphaeronella munnopsidis Hansen. Sphceronella munnopsidis, HANSEN, H. J. "The Choniostomatidae." Copenhagen, 1897, p. 168; pi. 10, fig. 4, a-d. Found in the marsupium of Munnopsis typica M. Sars, a crustacean living in the Kara sea. Stenothocheres egregius Hansen. Stenothocheres egregius, HANSEN, H. J. "The Choniostomatidae." Copen- hagen, 1897, p. 89; pi. 1, fig. 1, a-l From the marsupium of Metopa borealis G. O. Sars, and Metopa bruzelii (Goes), Greenland amphipods. COPEPODA CALIGOIDA. Caligus curtus Miiller. Torske-luus, STROM, HANS. "Physisk og Oeconomisk Berkrivelse." Copenhagen, 1762, p. 167; pi. 1, figs. 4-6. Binoculus piscinus oculis marginalibus , FABRICIUS, OTHO. "Fauna Groenlandica," Hafniae et Lipsias, 1780, p. 264; No. 239. Found on the cod and haddock along the Greenland coast and known among the fishermen by the name bestowed upon it by Strom, "Torskeluus". Dinematura ferox Kr^yer. Dinematura ferox, MIERS, E. J. On a "small Collection of Crustacea made by Edward Whymper, Esq., chiefly in the N. Greenland Seas." Jour. Linn. Soc., vol. 15, p. 71. 1881. From the shark, Somniosus microcephalies (Bloch), at Umanak, Greenland, usually attached to the eye of the fish. Echthrogaleus coleoptratus (Guerin). Echthrogaleus coleoptratus, WILSON, C. B. "The Pandarinse and Cecropinae." Proc. U. S. Nat. Museum, vol. 33, p. 367. Found on an unidentified shark captured near Unalaska^ Alaska. Haemobaphes cyclopterina (Miiller). Lernaea cyclopterina, FABRICIUS, OTHO. "Fauna Groenlandica", 1780, p. 337; No. 326. Found on the gills of the following arctic fish, Cyclopterus spinosus Miiller, Myoxocephalus groenlandicus (Cuvier & Valenciennes), Myoxocephalus bubalis (Euphrasen), Pholis fasciatus (Bloch & Schneider), Sebastes marinus (Linnaeus), Merluccius merluccius (Linnaeus). Hatschekia hippoglossi (Kr$yer). Clavella hippoglossi, STEPHENSEN, K. "Grnlands Krebsdyr." Meddel. om Gr^nland, vol. 22, 1913, p. 341. From the gills of a species of Hippoglossus on the Greenland coast. Lepeophtheirus hippoglossi (Kr^yer). Binoculus piscinus, FABRICIUS, OTHO. "Fauna Groenlandica", 1780, p. 264; No. 239. Caligus hippoglossi, KR<£YER, H. "Snyltekrebsene." Naturhistorisk Tidsskrift, vol. 2, 1837, p. 625; pi. 6, fig. 3. Lepeophtheirus parviventris Wilson. Lepeophtheirus parviventris, WILSON, C. B. "The Caliginae." Proc. U. S. Nat. Museum, vol. 28, 1905, p. 635; pi. 23, fig. 275-284. On the gills of Gadus macrocephalus Tilesius, from Alaska. Parasitic Copepoda 13 L Lepeophtheirus robustus Kr<£yer. Lepeophtheirus robustus, KR<£YER, H. "Snyltekrebsene." Naturhistorisk Tidsskrift, ser. 3, vol. 2, 1863, p. 135; pi. 6, fig. 6, a-c. Found on the gills of various rays from the Greenland coast. Lepeophtheirus salmonis Kr^yer. Lepeophtheirus salmonis, WILSON, C. B. " Pacific Coast Copepods." Proc. U. S. Nat. Museum, vol. 35, 1908, p. 440. From the outer skin of the hump-backed salmon, Oncorhyncus gorbuscha, and the Dolly Varden trout, Salvelinus malma, at Karluk, Alaska. Lernaeocera branchialis (Linna3us). Lernaea gadina, FABRICIUS, OTHO. " Fauna Groenlandica", 1780, p. 336: No. 325. Lernaea branchialis, STEPHENSEN, K. "Gr<£nlands Krebsdyr." Meddel. om Gr^nland, vol. 22, 1913, p. 348. Found on the gills of various Gadidse from the Greenland coast. Lernaeocera godfroyi (Quidor). Lernaea godfroyi, QUIDOR, A. Deuxieme Expedition Antarctique Frangaise. "Copepodes parasites." Sci. Nat.; Documents scient., 1912, p. 210; pi. 2, fig. 23. From the gills of Cottoperca dolloi (?), at Tuesday bay, Antarctic ocean. Nesippus borealis Steenstrup & Liitken. Nogagus borealis, STEENSTRUP, J. & LUTKEN, CH. "Snyltekrebs og Ler- naeer." Kongl. Danske Vidensk. Selsk. Skrifter, ser. 5; vol. 5, 1861, p. 387; pi. 11, fig. 21. Nesippus borealis, WILSON, C. B. "The Pandarina3 and Cecropina?." Proc. U. S. Nat. Museum, vol. 33, 1907, p. 438; pi. 37. From the coast of Alaska, host unknown. Peniculus clavatus (Muller). Peniculus clavatus, KRYER, H, "Snyltekrebsene." Naturhistorisk Tidsskrift, ser. 3, vol. 2, 1863, p. 266; pi. 14, fig. 8, a-g. From the fins of Sebastes norvegicus (Cuv. & Val.), on the Greenland coast. Pennella antarctica Quidor. Pennella antarctica, QUIDOR, A. Deuxieme Expedition Antarctique Frangaise. " Copepods Parasites." Sci. Nat.; Documents scient., 1912, p. 206; pi. 1, fig. 15-17; pi. 4, fig. 29-34. From the skin and blubber of whales belonging to the genera Bal&noptera and Megaptera, in the antarctic ocean. Pennella balaenopterae Koren & Danielssen. Pennella balcenopterce, QUIDOR, A. Deuxieme Expedition Antarctique Frangaise. "Copepodes Parasites." Sci. Nat.; Documents scient., 1912, p. 205; pi. 1, fig. 14; pi. 4, fig. 32. From the skin of Balcenoptera sibbaldi, in the antarctic ocean. Pennella charcoti Quidor. Pennella charcoti, QUIDOR, A. Deuxieme Expedition Antarctique Frangaise. "Copepodes Parasites." Sci. Nat.; Documents scient., 1912, p. 207; pi. 1, fig. 13; pi. 2, fig. 25; pi. 4, fig. 33. Found on the skin of a species of Balcenoptera in the antarctic ocean. 14 L Canadian Arctic Expedition, 1913-18 Pennella liouvillei Quidor. Pennella liouvillei, QUIDOR, A. Deuxieme Expedition Antarctique Franchise. "Copepodes Parasites." Sci. Nat.; Documents sclent., p. 209; pi. 1, fig. 1; pi. 2, fig. 26; pi. 3, fig. 28; pi. 4, fig. 37. From the skin and flesh of a species of Exocoetus, in the antarctic ocean. Sarcotretes scopeli Jungersen. Sarcotretes scopeli, JUNGERSEN, H. "On a new Gymnoblastic Hydroid (Ichthyocodium sarcotretis) epizoic on a new Parasitic Copepod (Sarcotretes scopeli) infesting Scopelus glacialis Reinhardt ." Vidensk. Meddel. Naturh. Foren., Kj0benhavn, vol. 64, 1911, p. 1; pi. 1, fig. 1-27. Found burrowing in the flesh of Scopelus glacialis on the Greenland ma-i. COPEPODA NOTODELPHYOIDA. Buprorus loveni Thorell. Buprorus loveni, AURIVILLIUS, C. W. S. "Bidrag till Kannedomen om Krustaceer som lefva hos Mollusker och Tunikater." Akademisk Afhandling som med tillstand af vidtberomda filosofiska Facultetens i Upsala, matemat.-natur. sektion, Stockholm, 1883, p. 33; pi. 1, fig. 13. "Krustaceer hos arktiska Tunikater." Vega-Expeditionens Vetensk. lakttag., vol. 4, 1885, p. 236. On Phallusia mentula Mtiller and Ascidia obliqua Alder, arctic tunicates from Lapland. Doropygus arcticus Aurivillius. Doropygus arcticus, AURIVILLIUS, C. W. S. "Krustaceer hos arktiska Tunikater." Vega-Expeditionens Vetensk. lakttag., vol. 4, 1885, p. 233; pi. 8, fig. 1-11. Found in the branchial sac of Chelysoma macleyanum Sow. et Brod., an arctic tunicate. Doropygus demissus Aurivillius. Doropygus demissus, AURIVILLIUS, C. W. S. "Krustaceer hos arktiska Tunikater." Vega-Expeditionens Vetensk. lakttag., vol. 4, 1885, p. 230; pi. 7, fig. 14-24. Found in the branchial sac of Cynthia echinata Linn, an arctic tunicate. Doropygus gibber Thorell. Doropygus gibber, THORELL, M. T. "Krustaceer som lefva i arter af Slagtet Ascidia, Linn." Kongl. Svensk. Vetensk. Handl., vol. 3, 1859, no. 8, p. 52; pi. 8, fig. 11. Found in a species of Phallusia, an arctic ascidian. Enteropsis dubius Schimkewitsch. Enteropsis dubius, SCHIMKEWITSCH, W. M. "Embryogenie des Copepodes parasites" (Russian). Trav. Soc. Nat. St. Petersbourg, vol. 20, 1889, part 2, p. 75; pis. 3-5. Found in Molgula groenlandica, an arctic ascidian. Enteropsis sphinx Aurivillius. Enteropsis sphinx, AURIVILLIUS, C. W. S. "Krustaceer hos arktiska Tunikater." Vega-Expeditionens Vetensk. lakttag., vol. 4, 1885, p. 233; pi. 8, fig. 1-11. Found in the branchial sac of Molgula ampulloides Beneden, an arctic ascidian. Parasitic Copepoda 15 L Haligryps aculeatus Aurivillius. Haligryps aculeatus, AURIVILLIUS, C. W. S. "Krustaceer hos arktiska Tunikater." Vega-Expeditionens Vetensk. lakttag., vol. 4, 1885, p. 244; pi. 9, fig. 11-20. Found in the branchial sac of Molgula ampulloides Beneden, an arctic ascidian. Haligryps teres Aurivillius. Haligryps teres, AURIVILLIUS, C. W. S. "Krustaceer hos arktiska Tunikater." Vega-Expeditionens Vetensk. lakttag., vol. 4, 1885, p. 243: pi. 9, fig. 1-10. Found in the gall bladder of Molgula ampulloides Beneden, an arctic ascidian. Notodelphys agilis Thorell. Notodelphys agilis, AURIVILIUS, C. W. S. "Krustaceer hos arktiska Tunikater." Vega-Expeditionens Vetensk. lakttag., vol. 4, 1885. p. 230. From the branchial sac of Phallusia mentula Miiller on the north coast of Finland. Schizoproctus inflatus Aurivillius. Schizoproctus inflatus, AURIVILLIUS, C. W. S. "Krustaceer hos arktiska Tunikater." Vega-Expeditionens Vetensk. lakttag., vol. 4, 1885, p. 248; pi. 9, fig. 21-32. From the branchial sac of a species of Phallusia from the arctic ocean. Zanclopus antarcticus Gravier. Zanclopus antarcticus, GRAVIER, CH. Deuxieme Expedition Antarctique Frangaise. "Crustaces Parasites." Sci. Nat.; Documents scient., 1912, p. 68; text figs. 53-62. On Cephalodiscus anderssoni Gravier, an antarctic ascidian. COPEPODA HARPACTICOIDA. Canthocamptus hippolytes Kr^yer. Canthocamptus hippolytes, KR^YER, H. "Snyltckrebsene." Naturhistorisk Tidsskrift, ser. 3, vol. 2, p. 334; pi. 17, fig. 9. Found on the gills of a Greenland shrimp which Kr<£yer called Hippolyte aculeata, but which Stephensen afterward changed to Spirontocaris groenlandica. This parasite cannot be located definitely. If it is really a Canthocampius it belongs in the Harpacticoida, but even Kr^yer himself placed a question mark after the genus name. Idyaea furcata (Baird). Idyafurcata, AURIVILLIUS, C. W. S. "Krustaceer hos arktiska Tunikater." Vega-Expeditionens Vetensk. lakttag., 1885, vol. 4, p. 229. Idya furcata, VANHOFFEN, E. "Crustaceen aus dem Kleinen Karajakfjord in W.-Groenland." Zool. Jahrb., Abth. f. Syst., vol. 25, 1907, p. 507; pi. 20-22. Found in Molgula ampulloides Beneden, an arctic tunicate. 16 L Canadian Arctic Expedition, 1913-18 COPEPODA OF UNCERTAIN POSITION. Psilomallus hippolytes Kryer. Psilomallus hippolytes, KRYER, H. "Snyltekrebsene." Naturhistorisk Tidsskrift, ser. 3, vol. 2, 1863, p. 336; pi. 17, fig. 10. From a crustacean called by Kr^yer Hippolyte aculeata (O. Fabric! us j, and by Stephensen (1913) Spiroritocaris groenlandica (J. C. Fabricius), on tin- Greenland coast. With the meager description and the single figure given by Kryer it is impossible to locate this species anywhere with certainty. It is even doubtful whether it is a true copepod. Tanypleurus alicornis Steenstrup & Lutken. Tanypleurus alicornis, STEENSTRUP, J. & LUTKEN, CH. "Snyltekrebs og Lernaeer." Kongl. Danske Vidensk. Selsk. Skrifter, ser. 5, vol. 5, 1861, p. 425; pi. 15, fig. 38. From the gills of Cyclopterus spinosus Miiller, and the mouth of Somniosus microcephalus (Bloch), Greenland sharks. This species' was not definitely located by Steenstrup & Lutken, but Bassett- Smith in 1899 placed it in the Chondracanthidse. It cannot possibly belong there if the original description is correct, for its attachment apparatus consists of two stalks or arms, separate or fused, joined at the tips with a cirrhose bulla. If these arms correspond to the second maxillae the species must belong to the Lernaeopodidae, but until this can be determined we must leave it unlocated. Report of the Canadian Arctic Expedition, 1913-18. Volume I: General Introduction, Narrative, Etc. Part A: Northern Party, 1913-18. PartB: Southern Party, 1813-16. By Rudolph Martin Anderson. (In preparation) . Volume II: Mammals and Birds. Part A: Mammals. By Rudolph Martin Anderson. (In preparation). Part B: Birds. By R. M. Anderson and P. A. Taverner. (In preparation). Volume HI: Insects. Introduction. By C. Gordon Hewitt. (In press) Part A: Collembola. By Justus W. Folsom. (Issued). Part B: Neuropteroid Insects. By Nathan Banks. (Issued). Part C: Diptera. By Chas. W. Alexander, Harrison G. Dyar. and J. R. Malloch. (Issued). Part D: Mallophaga and Anoplura. By A. W. Baker, G. F. Ferris, and G. H. F. Nuttali. (Issued). Part E: Coleoptera. By J. M. Swaine. H. C. Fall, C. W. Leng, and J. D. Sherman, Jr. (Issued). Part F: Hemiptera. By E. P. Van Duzee. (Issued). , Part G: Hymenoptera and Plant Galls. By Alex. D. MacGillivray, Charles T. Brues, F. W. L. Sladen. and E. Porter Felt. (Issued). Part H: Spiders, Mites, and Myriapods. By J. H. Emerton, Nathan Banks, and Ralph V. Chamberl'"n (Issued). Part I: Lepidoptera. By Arthur Gibson. (Issued). Part J: Orthoptera. By E. M. Walker. (In press). Part K: General Observations on Insect Life in the Arctic. By Frits Johansen. (In preparation). Volume IV: Botany. Part A* Freshwater Algae and Freshwater Diatoms. By Charles W. Lowe. (In preparation) Part B' Marine Algae. By F. Collins. (In preparation). Part C: Fungi. By John Dearness. (In preparation). Part D: Lichens. By K. L. Merrill. (In preparation). Part E: Mosses. By R. S. Williams. (In press). Volume V: Botany. Part A: Flowering Plants and Ferns. By James M. Macoun and Theo. Holm. (In preparation). Part B: General Notes on Arctic Vegetation. By Frits Johansen. (In preparation). Volume VI: Fishes, Tunlcates, Etc. Part A: Fishes. By F. Johansen. (In preparation). Part B : Ascidians, etc. By A, G. Huntsman. (In preparation). Volume VII: Crustacea. Part A: Decapod Crustaceans. By Mary J. Rathbun. (Issued). Part B: Schizopod Crustaceans. By Waldo L. Schmitt. (Issued). Part C: Cumacea. By W. T. Caiman. (In press). Part D: Isopoda. By Miss P L. Boone. (In press). Part E: Amphipoda. By Clarence R. Shoemaker. (In press). Part F: Pycnogonida. Leon J. Cole. (In press). Part G: Euphyllopoda- By F. Johansen. (In preparation). Part H: Cladocera. By Chancey Juday. (Issued). Part I: Ostracoda. By R. W. Sharpe. (In preparation). Part J: Freshwater Copepoda. By C. D wight Marsh. (Issued). Part K: Marine Copepoda. By A. Willey. (Issued). Part L: Parasitic Copepoda. By Chas. B. Wilson. (In press). Part M: Cirripedia. By H. A. Pilsbry. (In preparation). Volume VIII: Afollusks, Echlnoderms, Coelenterates, Etc Part A' Mollusks, Recent and Pleistocene. By Wm. H. Dall. (Issued). Part B: Cephalopoda and Pteropoda. By S. S. Berry and W. F. Clapp. (In preparation). Part C: Echinoderms By Austin H. Clark. (Issued). Part D: Bryozoa By R. C. Osburn. (In preparation). Part E: Rotatoria By H. K. Harring. (In preparation). Part F: Chaetognatha By A. G. Huntsman. (In preparation). Part G: Actinozoa, and Alcyonaria. By A. E. Verrill. (In press). Part H: Medusae and Ctenophora. By H. B. Bigelow. (Issued). Parti: Hydroids. By McLean Fraser. (In preparation). Part J: Porifera. Volume IX: Annelids, Parasitic Worms, Protozoans, Et. Part A: Oligochaeta. By Frank Smith and Paul S. Welch. (Issued). Part B: Polychaeta. By Ralph V. Chamberlin. (In press). Part C: Hirudinea. By J. P. Moore. (In press). Part D: Gephyrea. By Ralph V. Chamberlin. (Issued). Part E: Acanthocephala. By H. J. Van Cleave. (Issued). Part F: Nematoda. By N. A. Cobb. (In preparation). Part G: Trematoda By A. R. Cooper. (In preparation). Part H: Cestoda. By A. R. Cooper. (In preparation). Part I: Turbellaria. By A. Hassell. (In preparation). PartJ: Gordiacea. Part K: Nemertine. Part L: Sporozoa. By J. W. Mavor. (In preparation). Part M : Foraminifera. By J. A. Cushman. (Issued). Volume X: Plankton, Hydrography, Tides, Etc. Part A: Plankton. By Albert Mann. (In preparation). Part B: Marine Diatoms. By L. W. Bailey. (In'preparation.) Part C: Tidal Observations and Results. By W. Bell Dawson. (In press . Part D: Hydrography. (In preparation)