22 BOVALLIUS. NEW ISOPODA. 



the two first segments are nearly rectangvilar, tliose of tlic 

 tliird and fourth truncated, tliose of the three last oues 

 rounded. 



The epimerals (Pl. W fig. 42,) of the second and third 

 segments are broader at the posterior end, bent downwards at 

 the anterior. That of the second segment occupies the whole 

 eide of the segment; those of the third and fourth segments 

 scarcely more than two thirds of it, those of the fifth and 

 sixth segments fully three fourths of it, and the last one the 

 whole of the segment. The epimerals of the fourth, fifth, 

 and sixth segments are broader at the anterior margin, narrower 

 behind. The last one is oblong with rounded ends. 



The first pair of per-eiopoda (Pl. IV fig. 44) have the 

 tibia broadly extended, the dactylus short. The two following 

 pairs are subequal, with the femora much longer than broad. 

 The following four pairs have much broader femora and strongly 

 developed carinae. In the seventh pair (Pl. IV fig. 45) the 

 femur is as broad as long, the hinder margin is straight. 



The pleon is as broad at the base as long. The first 

 segment longer than the second, but narrower than half of 

 the fifth (2 : 5). The three last pleonal segments are broader 

 than the urus (10 : 9) and a little narrower than the fifth (or 

 fourth) segment of the pereion (10 : 11). The whole pleon 

 equals the fifth pereional segment in length. 



The lams is broad, nearly semicircular, not quite twice as 

 broad as long (9 : 5); the upper side is perfectly plain and 

 smooth. 



The pleon and urus together are about a third of the 

 length of the pereion with the head (18 : 51). 



The uropoda (Pl. IV fig. 46) reach a little beyond the 

 jDOSterior margin of the urus. The peduncles are long and 

 stout, nearly as long as the inner ramus (14 : 17). The inner 

 ramus reaches a little beyond the outer. It is oblong-lanceo- 

 late. The exteriör one is falciform. 



Colour. Bright yellow. 



Length. 18 m. m. 



Hab. The coast of Hayti, West-Indies. (C. B). 



From the harbour of Jacmal; captured April 1883. 



