JvERA ALBIFRONS. 



ISOPODA. 



NORM ALIA. 



317 



ASELLIDJi. 



ALBIFRONS. 



Specific character. Subovate, very depressed, sides of the cephalon, pereion, 

 and pleon margined. Colour cinereous, with the anterior margin of cephalon 

 whitish. 



Length, about one-sixth of an inch. 



Oniscus albifrons. MONTAGU, MSS. in Brit. Mus. 



Jcera albifrons. LEACH, Edinb. Encycl. vii. p. 434. Trans. Linn. Soc. 



xi. p. 373. Suppl. Enc. Brit. i. 428. SAMOUELLE, 



Ent. Compend. p. 110. DESMAREST, Cons. p. 316. 



MILNE EDWARDS, Crust, iii. p. 150. W. THOMPSON, 



in Ann. Nat. Hist. xx. p. 245. WHITE, B. M. Cat. 



Brit. Crust, p. 69. Pop. Hist. Brit. Crust, p. 231. 



GOSSE, Man. Mar. Zool. i. fig. 243. 

 Jcera nivalis ? KROYER, Gronlands Amfipod. p. 75, pi. 4, fig. 21a k. 



MILNE EDWARDS, 0. C. p. 149. 

 Oniscus marinusl 0. FABRICIUS, Fn. Groenl. p. 252, n. 229. 



