PARASITIC COPEPODS — WILSON 547 



the third segment longer than the 3 following segments combined, the 

 only setae terminal on the end segment. The maxilliped is 4-seg- 

 mented, the end segment transformed into a stout claw sharply bent 

 at the center. The four pairs of legs are biramose, the rami 2-seg- 

 mented, the exopods longer than the endopods, the basipod segments 

 completely fused. 



Remarks. — This is another new genus infesting annelids at con- 

 siderable depths and it evidently belongs to the family Clausidiidae. 

 Its most striking characteristics are the very large maxillipeds, the 

 rami of the swimming legs, and the jointed caudal rami. Total length, 

 6.24 mm. Ovisacs, 4.16 mm. 



Family ASTEROCHERIDAE 



Genus ASTEROCHERES Boeck, 1859 



ASTEROCHERES LILLJEBORGII Boeck 



Plate 30, Figures 161, 162 



Asterocheres Ullje'borgii Boeck, 1859, p. 176 [6]. 



This species has been noted by many European authors but this is 

 the first record from American coasts. A single female, U.S.N.M. 

 No. 78909, was obtained from the outside surface of a north Pacific 

 starfish {Henricia leviuscula) on the coast of Amlia, one of the 

 Aleutian Islands. 



Suborder Lernaeopodoida 



Family LERNAEOPODIDAE 

 Genus BRACHIELLA Cuvier, 1830 



BRACHIELLA SQUALI, new species 

 Plate 31, Figuees 163, 164 



One of the two females taken from the spiracles of a shark {Squalus 

 mitsukurii) by A. Jacot at Tsinan, China, has been selected as the 

 holotype, U.S.N.M. No. 60565. 



Fertiale. — Cephalothorax nearly as large as the body and turned 

 backward in line with the second maxillae, the two forming an angle 

 of about 60° with the body axis. Body pear-shaped, narrowed an- 

 teriorly where it joins the cephalothorax, broadly rounded and some- 

 what depressed posteriorly. On a level with the dorsal surface at 

 the posterior end of the body is a flattened slightly bipartite genital 

 process. On each side of this process there issues from the dorsal 

 surface of the body somewhat in front of the posterior margin a short 

 conical process, largest at the base and tapering almost to a point 



