4 L Canadian Arctic Expedition, 1913-18 



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^. 

 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. 



