278 



ISOPODA. 



NORMAL1A. 



BICARINATA. 



Specific character. Animal depressed, terminal segment of the pleon wide 

 at its extremity, bearing on its upper side two diverging carinated lines, 

 which terminate at the posterior angles, the intervening space nearly straight 

 or slightly emarginate. Uropoda with the inner division larger than the outer, 

 truncated at the inner extremity. 



Length, 1^ inch. 



licarinata. LEACH, Dictionn. Sci. Nat. xii. p. 349. DESMAREST, 

 Cons. Crust, p. 305. MILNE EDWARDS, Crust, iii. 

 p. 241. CUVIER, Reg'ne An. (Edit. Crochard), Crust. 

 t. 67, f. 2. RATHKE, in Nov. Acta Cses. Leop. Nat. 

 Curios, vol. xx. pi. 6, f. 1 12. WHITE, B. M. 

 Cat. Brit. Crust, p. 79. Pop. Hist. Brit. Crust. 

 p. 251, pi. xiv. f. 5. GOSSE, Man. Mar. Zool. 1, 

 fig. 232. 



THIS is one of the largest species of known Isopods, 

 some individuals measuring about one inch and a half in 

 length. It is at once distinguished by the two elevated 

 divergent lines on the terminal segment of the tail and by 



