384 DE. W. T. CALMAN ON NEW OE EAEE 



at the tip. The anus is terminal and the anal valves are placed as in D. tuhulicauda, 

 although they are not so well marked as in that species. The apex of the telson on 

 the dorsal side of the anus is without spines and has only a single lateral pair of fine 

 setfE. 



The antennules are about three-fourths as long as the carapace ; the first segment of 

 the peduncle is a little longer than either of the other two ; the outer flagellum is 

 more than one-third of the length of the peduncle and more than twice as long as the 

 inner. 



The antennae have a large fusiform terminal segment which may possibly represent 

 the developing flagellum of the male sex. 



The mouth-parts appear to present no noteworthy divergences from the usual type. 

 The branchial plates have about four lobules and others in course of development. 



The third maxillipeds have small exopods, without setse, and obscurely divided into 

 two segments; the basis is greatly expanded distally and is produced into a broad lobe 

 which reaches nearly to the end of the carpus. 



The first legs are long and slender, about half of the carpus extending beyond the 

 pseudorostrum ; the basis is a little less than half as long as the distal segments 

 together ; the carpus is a little shorter than the propodus, which is nearly three times 

 as long as the dactylus. 



The second legs have the basis narrowed distally, a little shorter than the distal 

 segments together, the carpus about equal to the dactylus and three times as long as 

 the propodus. 



The third and fourth pairs of legs are long and stout. Each bears an exopod, about 

 one-third of the length of the basis, indistinctly divided into two segments, and carrying 

 a single terminal seta. The fifth pair of legs are only two-thirds as long as the 

 preceding pair, without exopods, and with fewer setse. 



The uropods hardly extend beyond three-fourths of the length of the telson; the 

 peduncle has three minute setse on the distal part of its inner edge. The exopod is a 

 very little longer than the endopod and more than half the length of the peduncle ; its 

 apical setse are long and slender. The endopod has three segments, the first occupying 

 more than half its length, with four small spines on the inner edge and a slender 

 terminal spine. 



In a specimen 1-7 mm. in total length the last thoracic somite is still without 

 appendages, the endopod of the uropods consists of only two segments, and the exopods 

 on the third and fourth pairs of legs and on the third maxillipeds are extremely small. 



A specimen of which the total length cannot have been less than 6 mm. is unfor- 

 tunately represented only by the abdomen and the posterior thoracic somites. It has 

 no exopods on the third and fourth pairs of legs. 



Bemarks. — In the great size and tubular form of the telson this species resembles 

 D. tuhulicauda Caiman (Cumacea, in Fisheries, Ireland, Sci. Invest. 1904, i. (1905) 



