242 HOLMES 



ment with two pairs of dorsal spines or tubercles ; tubercles on the sides 

 of the body at the antero-inferior angles of the third and fourth segments 

 and at the postero-inferior angle of the fifth segment. Palm of the 

 anterior gnathopods straight ^and pectinated with regularly spaced, up- 

 turned spines ; inner margin of the dactyl furnished with small jagged 

 teeth. Second gnathopods situated almost at the posterior extremity of 

 the segment ; basal joint short, broad, distally expanded, and somewhat 



FIG. 125. Caprella alaskensis. The posterior thoracic segments were missing 

 in the specimen figured. 



produced at the anterior angle ; anterior margin roughened with small 

 tubercles such as occur elsewhere on the appendage ; ischium produced 

 anteriorly into a long, narrow-pointed process; hand narrow, much 

 longer than all the preceding segments ; the palm devoid of a spine or 

 tubercle at the upper end, somewhat tumid a little below the middle of 

 the hand, and armed inferiorly with a large narrow spine separated by a 

 deep narrow sinus from a broad tooth below; dactyl large, rather 

 abruptly curved upward near the middle, slightly swollen in the basal 

 half, where the inner margin is furnished with some small irregular 

 denticulations. Gills narrowly oval. 



The specimen from which the description and figures of this species 

 were made had lost the posterior peraeopods and last two segments of 

 the thorax. In the elongation of the anterior part of the body and the 

 insertion of the second gnathopods this species resembles Caprella 



