CUMACEA FEOM THE COPENHAGEN MUSEUiM. 349 



posteriorly and projects as a rounded lobe for some distance between the bases of the 

 uropods. 



The antennules have the last segment of the peduncle about three times as long as 

 thick and a little shorter than the preceding. 



The first legs have the basis little more than half as long as the remaining segments ; 

 that of the second legs is little shorter than the remaining segments. 



The posterior legs are rather slender; the last pair are a little shorter than the 

 carapace and have the carpus more than twice as long as the merus and nearly as long 

 as the basis. 



The uropods have the peduncle longer by about one-fourth than the last somite. 

 The endopodite without its stout terminal spine is about two-thirds as long as the 

 peduncle and more than half as long again as the exopodite. There are three spinules 

 on the inner edge of the endopodite and four on that of the peduncle. 



Adult Male. — Total length 2'3 mm. 



Carapace about one-third of total length, its depth about half its length. 'J'he 

 dorsal edge is nearly straight, without teeth. The ocular lobe bears a number of large 

 and prominent lenses, but is without pigment. The pseudorostrum is short, obliquely 

 truncated, with the upper edge slightly concave ; the lateral plates meet in front of the 

 ocular lobe for a distance less than the diameter of the lobe. The antero-lateral 

 margin is oblique and the angle is rounded. The surface of the body is without 

 conspicuous hairs. 



The abdomen is shorter than the cephalothoracic region. The last somite is shorter 

 than the preceding, not inflated ; seen from above it is more than two-thirds as broad 

 as long, increasing slightly in width posteriorly and projecting as a rounded lobe for 

 some distance between the bases of the uropods. The lateral antennal grooves are 

 distinct on all the somites except the last. 



The antennules have the last segment of the peduncle about three times as long as 

 thick and distinctly shorter than the preceding. The flagella of the antennae are about 

 as long as the body. 



The proportions of the legs are much as in the female. The last pair are distinctly 

 shorter than the carapace and have the carpus two and a half times as long as the 

 merus and nearly as long as the basis. 



The uropods have the peduncle longer by one-half than the last somite. The 

 endopodite, without its terminal spine, is less than two-thirds as long as the peduncle 

 and distinctly more than half as long again as the exopodite. There are six spinules 

 on the inner edge of the endopodite and the same number on that of the peduncle. 



Occurrence. — " Cruz Bay, St. Jan (Danish West Indies), 6/96." Chr. Levinsen Coll., 

 Copenhagen Museum. Co-types in British Museum, 



VOL. XVIII. — PART IV. No. 2. — February. 1911. 3 B 



