246 



HOLMES 



less than twice as long as deep and armed above with three pairs of 

 spines, of which the middle pair is the largest ; fifth segment with two 

 pairs of dorsal spines, the two following segments with a single pair of 

 dorsal spines near the middle, the last segment with an additional pair of 

 smaller spines or tubercles at the posterior end of the upper side. Eyes 

 small and round. Antennae of subequal length and less than half as long 

 as the body ; the first pair with the first joint of the peduncle about three 

 fourths as long as the second and but slightly longer than the third ; 

 flagellum scarcely as long as the peduncle. Second antennse fringed 

 posteriorly with long setae, the last joint of the flagellum but slightly 

 longer than the preceding one ; flagellum two-jointed and about as long 

 as the last joint of the peduncle. Gnathopods more or less scabrous 



FIG. 128. Caprella kincaidi. Ab.d. dorsal side of abdomen and last thoracic segment; 



Ab.v. ventral side of abdomen. 



with minute short spinules such as occur on the surface of the body, tha 

 hand of the second pair broadly ovate and furnished with a tooth at the 

 upper end of the palm and a smaller tooth a little below the middle. 

 Gills nearly round. Palm of the posterior perseopods occupying three 

 fourths of the posterior margin of the propodus, and defined above by a 

 prominence bearing a pair of serrated spines. Penes median ; the suc- 

 ceeding abdominal appendages apparently one-jointed. 



Length, 7 mm. 



This species is easily distinguished from most members of the genus 

 by its short, stout, subequal antennae, the arrangement of spines on the 

 head, and the very short first segment of the thorax. 



