PORCELLIO SCABER. 



ISOPODA. 



NORMALIA. 



0NI8CID.E. 



POKCELLIO SCABEl?. 



Specific character. Elongate -ovate, rugose. Lateral processes of the 

 cephaloB pery promiuent, with the external angle rounded. The middle pro- 

 cess triangular. Last joint of the pleon ending in a sharp triangular point, 

 deeply sulcated down the middle. 



Length, nearly half an inch. 



Porcellio scaler. Latreille, Hist. Nat. Crust, et Ins. vii. p. 45. 



Gen. Cr. et Ins. i. p. 70. Leach, in Trans. Linn. 

 Soc. xi. p. 375. Edinb. Enc. vii. p. 406. Suppl. 

 Enc. Brit. 1429. Samouelle, Ent. Comp. p. 112. 

 Desmakest, Cons. Crust, p. 321. Guerin-Menev. 

 Icon. R. An. Crust, t. 31, f. 7. Milke Edwards, 

 Crust, iii. p. 1C7. Cuvier, Rfegne An. (Edit. 

 Crochard), t. 71, f. 1. Kinahan, Nat. Hist. Rev. 

 vol. 4, 1857, p. 277, pi. xxi. figs. 2 and 8. Koch, 

 in Cont. Panzer Heft. 180, n. 6 and 7. White, B. 

 M. Cat. Brit. Crust, p. 72. Pop. Hist. Brit. Crust, 

 p. 237, pi. xiii. fig. 2. Brandt and Ratzeburg, 



