346 DE. W. T. CALMAX OX NEW OE EAEE 



prominent corneal lenses. The pseudorostrum is shorter than in the female and its 

 upper edge is concave. The antero-lateral margin is very short and the angle has no 

 tooth. The last somite of the abdomen is inflated as in the female. The antennal flagella 

 are nearly or quite as long as the body and the lateral grooves are well-marked on all 

 the abdominal somites except the last. 



The pi-oportions of most of the appendages are much as in the female, but the 

 uropods are longer ; their length to the tip of the terminal spines is greater than that 

 of the last somite. The peduncle is more than half as long as the last somite and 

 nearly three times as long as its greatest width. There are four spinules on the inner 

 edge of the endopodite and five spinules interspersed with fine setae on that of the 

 peduncle. 



Occurre7ice.—GiiU o{ Siam, " Koh Kam, 5-10 fathoms, 4-6/2/00," "Between Koh 

 Mesan and Cape Liant, 5-8 fathoms, 7/2/00," " North side of Koh Chang, 1 fathom, 

 o/3/OO." Th. Mortensen Coll., Copenhagen Museum. Co-types in British Museum. 



CUMELLA CLAVICAUDA, sp. n. (Plate XXXII. figs. 7-10.) 



Description of adult Hale. — Total length 1-9 mm. 



Carapace less than one-third of total length, its depth more than half of its length. 

 Dorsal edge slightly sinuous, without spines. The eye is very large, wdth about nine 

 large corneal lenses, of which one is in the middle line in front ; in all the specimens 

 examined the eye-pigment is aggregated into a pair of small lateral spots, so that under 

 a low magnification the eye appears to be paired and the animal is apt to be mistaken 

 for a species of .Kannastacus. Tlie pseudorostrum is very short, the lateral plates 

 hardly meeting, if at all, in front of the ocular lobe and forming a pair of small tooth-like 

 prominences when the carapace is viewed from above. The antero-lateral maro-in is 

 short and nearly straight and the angle is rounded ofi". As in C. forjicula, the last 

 filadominal somite is longer than the preceding and inflated as seen from the side ; seen 

 from above it increases in width postei'iorly, but the hinder edge is broadly convex and 

 hardly produced between the bases of the uropods. The lateral groove is distinct only 

 on the first four abdominal somites and the antennal flagellum is of a corresponding 

 length. 



The antennules have the peduncle shorter aud stouter than in C. forjicula, the inner 

 flagellum minute and unsegmented. 



The basis of the first legs is much more than two-thirds as long as the remaining 

 segments. 



The posterior legs are relatively short ; those of the last pair are little more than 

 two-thirds as long as the carapace and have the carpus about one and a half times as 

 long as the merus and little more than half as long as the basis. 



The uropods are similar to those of C. forjicula. The greatest length to the tip of 

 the terminal spine is about one-third more than that of the last somite. The peduncle 



