No. 2194. NORTH AMERICAN PARASITIC CO PEI'ODS— WILSON. 95 



HAEMOBAPHES CYCLOPTERINA (Fabrlcius). 



Plate 14, ngs. 114-118. 



Lemaea cyclopterina Fabricius, Fauna Groenlandica, 17S0, p. 337. — Kb0yer, 

 Naturhistorisk Tiddskrift, 1837, p. 502, pi. 5. fig. 4, a— e.— Baird, Proa 

 Zool. Soc. Loudon, 1861, p. 239. 



ScJiisturus cyclopterimis Oken, Lehrbuch Naturgeschichte, 1810, p. 183. 



Lerneocera cyclopterina Blainville, Jour, de Physique, vol. 95, 1822, p. 376. 



Hacmobaphcs cyclopterina Steenstrup and Lutken (given under genus 

 above). — T. and A. Scott, British Parasitic Copepoda, Kay Society, 1913, 

 p. 147, pi. 44, figs. 5-7.— Wilson, Coutrib, Canadian Biology, 1906-1910 

 (pub. 1912), p. 99. 



Host and record of specimens. — Fifteen females with egg strings 

 were obtained from the gills of Cyclogaster ingens Gilbert, in the Sea 

 of Japan off the Korean coast at station 48G3 of the fisheries steamer 

 Albatross in July, 190G, and have been given Cat. No. 47818, U.S.N.M. 

 Three single females were obtained from the gills of Lycenchelys 

 (Lycodes) verrillii^ the first two by the steamer Speedwell in the 

 Gulf of Maine in August, 1877, the third " near La Have " in 1888. 

 These have been given, respectively, Cat. Nos. 6137, 38331, and 47819, 

 U.S.N.M. 



Specific characters of female. — The specific characters are the same 

 as the generic characters already given, but to them we may add the 

 following details. 



The entire cephalothorax and that portion of the neck in front of 

 the flexure was very soft and easily lacerated, which contrasted 

 strongly Avith the firm and solid condition of the remainder of the 

 body. This is the portion which hangs free within the fish's aorta 

 and doubtless remains soft for that reason. On the dorsal surface 

 the cephalothorax proper is distinctly indicated by a central longi- 

 tudinal ridge, which narrows anteriorly over the mouth parts, but 

 there are no visible traces of a carapace. 



On either side is a long cushion-like process, which narrows into 

 a small knob anteriorly and curls downward and inward over the 

 ventral surface almost to the median line. Dorsally these processes 

 are on a level with the central cephalothoracic ridge, ventrallv they 

 project considerably. In front of them two other cushion processes 

 are given off from the ventrolateral surface, which also project 

 ventrally. 



Between the rounded anterior ends of these processes are found on 

 the anterior margin the two pairs of antennae and on the ventral 

 surface the mouth parts. The cephalothorax is separated from the 

 second thorax segment by a distinct groove, and the second, third, 

 and fourth thorax segments are similarly defined dorsally but are 

 less distinct ventrally. The second and third segments are nearly 

 as wide as the head, including the lateral processes; the fourth seg- 



