468 

 ISOPODA. 



NORM ALIA. 



ONISCIM. 



ONISGIDJE. 



ONISCUS ASELLUS. 



Specific character. Broadly ovate, sub-depressed, shining ; covered with 

 smooth granules. Lateral lobes of the cephalon large, inclined backwards. 

 Frontal line somewhat emarginate. Terminal segment of the pleon elongate- 

 triangular, convex above. Intermediate segments of the pleon terminating 

 in acute angles. 



Length, three and a half to eight lines. 



Oniscus asellus. LINN., Syst. Nat. ii. p. 1061. DE GEEK, Ins. vii. t. 35, 

 f. 1. GEOFFROY, Ins. Paris, ii. t. 22, f. 1. LATREILLE, 

 Hist. Nat. Crust, et Ins. vii. p. 42. LEACH, Edin. Enc. 

 vii. 406. SAMOUELLE, Ent. Compend.p. 111. JOHNSSON, 

 Syn. Framst. Sver. Onisc. p. 15. WHITE, B. M. Cat. 

 Brit. Crust, p. 71. Pop. Hist. Brit. Crust, p. 234. 



Oniscus murarius. CUVIER, in Journ. d'Hist. Nat. ii. t. 26, f. 11. 

 FABRICITJS, Ent. Syst. Suppl. p. 300. BRANDT and 

 RATZEB., Arzn. Thiere, ii. t. 12, f. 7. BRANDT, in 

 Bull. Mosc. vi. p. 182. MILNE EDWARDS, Crust, iii. 



