CUMACEA FROM THE COPENHAGEN MUSEUM. 345 



CuMELLA FORFicuLA, sp. n. (Plate XXXII. figs. 1-0.) 



Description of adult Female. — Total length 1-7 mm. 



Carapace a little less than one-third of total length, compressed, its depth more than 

 half of its length. The dorsal edge is sinuous, concave in its posterior part, convex 

 anteriorly, and with a small convexity just in front of the hinder margin ; commonly, 

 each of these convexities bears a curved spine, but sometimes only the anterior spine 

 is present. The ocular lobe is prominent on the dorsal surface and the eve is well 

 pigmented. The pseudorostrum is long, directed slightly upwards, and acutely pointed ; 

 the lateral plates meet in front of the ocular lobe for a distance greater than the 

 diameter of the lobe. The straight antero-lateral margin slopes backwards and the 

 obtuse antero-lateral angle bears a single minute tooth. The surface of the carapace, 

 as of the rest of the body, bears a number of scattered hairs. 



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

 is of peculiar form ; it is longer than the preceding somite and, as seen from the side, 

 it is inflated, with arched upper and under surfaces ; seen from above, it increases in 

 width posteriorly and is produced as a rounded lobe for some distance between the 

 bases of the uropods. 



The antennules are slender, resembling in proportions those of C. limicola, but the 

 unsegmented inner flagellum is still more minute. 



The mouth-parts appear to difl'cr only in trivial details from those of the type of the 

 genus. 



The first legs resemble those of C. limicola, but have the basis relatively a little 

 shorter, less than two-thirds as long as the remaining segments. In the second legs 

 the basis is a little less than two-thirds as long as the remaining segments, while that 

 of C. limicola is distinctly more. 



The remaining legs are much more slender and have the carpus more elongated than 

 in C. limicola. Those of the last pair are about as long as the carapace and have the 

 carpus more than twice as long as the merus and four-tiftlis as long as the basis. 



The uropods are very short, their greatest length to the tip of the terminal spines 

 being less than that of the last somite. The peduncle is less than half as long as the 

 last somite, tapers a little distally, and is hardly more than twice as long as its greatest 

 width. The rami, especially the endupodites, are curved inwards like the tail-forceps 

 of an earwig. The terminal spines are indistinctly defined from the rami, but to tlie 

 tip of its spine the endopodite is a little longer than and the exopodite equal to the 

 peduncle. There are two spinules on the inner edge of the endopodite and a few 

 set£e on that of the peduncle. 



Adult Male. — Total length 1"85 mm. 



The body is a little more slender and elongated than in the female, the depth of the 

 carapace being less than half its length. There are no spines on the carapace and the 

 inequality of ihe dorsal surface is less marked. The eye is very large, with large and 



