NO. 2194. NORTH AMERICAN PARASITIC COPEPODS— WILSON. 69 



The only other species which closely resembles it is polynemi 

 Bassett-Smith, but in that species the head is in line with the neck 

 instead of at right angles to it, the basal joints of the legs are nar- 

 row-oblong instead of triangular and have no pigment spots, the 

 abdomen is shorter than the genital segment, while the egg strings 

 are two or three times as long as the abdomen and bright green in 

 cx)lor, 



LERNAEENICUS PROCERUS (Lcidy). 



Lemeonema proccra Leidy, Proe. Acad. Nat. Sci. Phihi., 188S, p. 165. — 

 Fowler, Report of New Jersey State Museum, 1911 (1913), p. 125. 



Host and record of spechnens. — Several of these parasites were 

 obtained by Leidy from the shark, Carcharias littoralis^ caught at 

 Beeseleys Point, New Jersey. They were hanging from the upper 

 lip on either side of the mouth, and were thickly covered with hy- 

 droids, Eiicope parasitica. 



S,pecifc characters of female. — Head horizontal, semioval, convex 

 above, with three short and blunt occipital tubercles; anterior part 

 well rounded, excavated beneath and inclosing the mouth, antennae, 

 and maxillipeds ; neck long, linear, and cylindrical ; trunk short, fusi- 

 form, and truncated posteriorly; abdomen longer than the genital 

 segment, linear, cylindrical; Qgg strings long, linear, and cylindrical. 



Color, a uniform pale yellow. 



Total length, 70 mm. ; including the egg strings, 90 mm. Length 

 of head, 3 mm. ; of neck, 30 to 45 mm. ; of genital segment, 10 to 12 

 mm. ; of abdomen, 12 to 15 mm. ; of egg strings, 20 mm. Diameter 

 of neck, 0.375 mm. ; of genital segment, 1.75 mm. ; of abdomen, 0.50 

 mm. ; of o^gg strings, 0.25 mm. 



{procerus, long.) 



Remarks. — This parasite is known only from Leidy's description 

 and the original specimens have been lost. Fowler in the reference 

 given above repeated Leidy's description, placing the species for 

 some unaccountable reason in the family of the Ergasilidae, although 

 he speaks of the parasites as " lerneans." Since the original speci- 

 mens are lost we must be guided by the above description (no figures 

 were published) and the species must remain as Leidy left it until 

 rediscovered at some future time. It is closely related to longiven- 

 tris, vorax, and polynemi, but does not agree well enough with either 

 of them to be identified with it. 



Genus SARCOTRETES Jungersen. 



Surcofretes Jungeksen, Vitlensk. Medclel. fra naturh. Foren., vol. 64, 1911, 

 33 pages, 2 plates, 6 text figures. 



External generic characters of female. — Cephalothorax in line 

 with the body axis and considerably enlarged; eye so deeply buried 

 as to be invisible; two lateral horns ventral to the carapace, large, 



