428 



ISOPODA. 

 NORMAL! A. 



SPH^EROMID^E. 



CYMODOCEA EMARGINATA. 



Specific character. Upper surface of the posterior part of the pereion, and 

 especially also of the pleon, granulose, the latter sparingly clothed with short 

 stiff bristles, having two tubercles on the hind margin of the basal portion, 

 and two larger in the middle of the last segment, which has an oval lobe in 

 the deep apical notch. 



Length, nearly half an inch. 



Cymodocea emarginata. LEACH, Dictionn. Sci. Nat. xii. p. 343. DESMAREST, 

 Cons. Crust, p. 296. MILNE EDWARDS, Crust, 

 iii. p. 214. WHITE, B. M. Cat. Brit. Crust, 

 p. 77. Pop. Hist. Brit. Crust, p. 246, pi. xiii. 

 f. 7. 



THIS species is much more granulose on the upper 

 surface than the preceding; the granules gradually in- 

 creasing in size beyond the middle of the body. The 

 head is very broad, and the eyes large. The basal joints 

 of the antennae are punctured ; the terminal articuli of 



