236 HOLMES 



a pair of spines. Second gnathopods with the carpus broad and strongly 

 bulging posteriorly ; hand oblong, with the lower angle produced below 

 the dactyl. The three posterior peraeopods short, the basal joints very 

 broad and nearly as long as the rest of the appendage, the posterior 

 margin smooth and furnished with a few very short setae. First pair of 

 uropods with the rami shorter than the peduncle ; rami of the second 

 pair about equal to the peduncle ; inner ramus of the terminal uropods 

 devoid of spines or setae and reaching the tip of the first joint of the 

 outer ramus ; outer ramus devoid of spines, with the exception of a few 

 at the tip of the first joint. Telson longer than wide, cleft nearly to the 

 base, the lobes diverging toward the tip, armed distally with a pair of 

 spines, and a spine near the middle of the outer margin. 



Length 3 mm. 



This species may be distinguished from the other members of the 

 genus by the short first joint of the flagellum of the first antennae. The 

 depression on the dorsal side of the fourth abdominal segment is much 

 less deep than in most of the other species of Tryp/wsa. 



Family STENOTHOIDM. 

 STENOTHCE ALASKENSIS sp. nov. 



Type from St. Paul Island, Pribilof Islands, Alaska (one specimen, 

 collected by Prof. Trevor Kincaid). 



First antennae about two thirds as long as the second ; the first joint of 

 the peduncle twice the length of the second ; third joint scarcely half as 

 long as the second ; flagellum not as long as the peduncle and composed 

 of about ten joints. Second antennae not half as long as the body, the 

 last joint of the elongated peduncle about the length of the preceding 

 one ; flagellum scarcely exceeding the last joint of the peduncle and 

 composed of few segments, of which the first is nearly as long as all the 

 others combined. Palp of the first maxillae consisting of a single joint, 

 the distal and inner margins of which are armed with short spines, 

 Maxillipeds with the inner plates comparatively short and broad, the 

 lobes armed distally with a pair of short spinules ; outer plate represented 

 by the projecting inner angle of the ischium ; palp rather stout. First 

 gnathopods with the merus produced and rounded at the lower end ; 

 carpus broad, the posterior margin somewhat projecting near the middle, 

 where a pectinate spine and several strong setae are inserted ; lower pos- 

 terior angle also armed with pectinate spines ; hand twice as long as 

 wide, much narrower than the carpus, tapering distally on both sides 

 from near the middle ; palm armed with short spinules ; dactyl pectinate 



