NO. 2194, NORTH AMERICAN PARASITIC COPEPODS— WILSON. 77 



on the dorsal surface and inclined dorsally; egg strings attached 

 near the dorsal surface, large in diameter, and coiled into a wide 

 spiral. 



Antennae reduced to mere Imobs on the dorsal surface of the head, 

 comparatively wide in diameter but elevated very little. Mouth 

 parts also reduced to rounded chitin knobs, one on the midline in 

 front of the base of the median frontal process, and behind this two 

 on either side of the midline. First two pairs of swimming legs 

 toward the posterior end of the cephalothorax biraniose, the rami 

 very indistinctly jointed; third pair posterior to the center of the 

 third segment, uniramose, the ramus also indistinctly jointed; fourth 

 pair on the posterioi* margin of the fourth segment also uniramose, 

 but with a single joint; all the rami are well armed with setae. 

 The basal joints of the first two pairs of legs are close together on 

 the midline, those of the third pair are a little farther apart, while 

 those of the fourth pair are widely separated, one on either side of 

 the ventral horn. 



Color (preserved material) a uniform dark brown, almost black, 

 the frontal processes and lateral horns lighter brown. 



Total length, 11 mm. Head and neck, 5 mm. long; third thorax 

 segment, 0.80 mm. in diameter. Trunk, 6 mm. long, 2 mm. wide, and 

 3 mm. thick at the posterior end. Egg strings, 3.50 mm, long, 1.35 

 mm. wide. 



{tHangulus, triangular, alluding to the outline of the trunk.) 



Remarks. — In the type-specimen it is possible that the antennae 

 may have been broken off, since these minute appendages, when 

 chitinized, are extremely brittle, but no scars of such a break could 

 be found. 



One of the lateral horns was broken, leaving a short stump, but 

 it is assumed that this horn corresponded to the one on the opposite 

 side. 



In both the other specimens the head and anterior neck were 

 lacking. 



PHRIXOCEPHALUS DIVERSUS, new species. 

 Plate 10, figs. 86 and 87. 



Host and record of specimens. — A single female with egg strings 

 was taken from the eye of Callion]/inus virgis Jordan, at a depth of 

 65 fathoms in Totomi Bay, off Hamamatsu, Japan, at station 3713, 

 b}' the Bureau of Fisheries steamer Albatross. 



This is made the type of the new species with Cat. No. 47809, 

 U.S.N.M. 



Specific characters of female. — Head, first, second, and third thorax 

 segments missing; fourth segment present and armed with two pairs 



