ISOPODA. 



NORM All A. 



PORCELLIO PRU1NOSUS. 



487 

 ON/SCIDJZ. 



PORCELLIO PRU1NOSUS. 



Specific character. Subovate, oblong, slightly rugose, and downy. Lateral 

 lobes of the front of the cephalon small and rounded. Central lobe minute, 

 almost linear. Pleon narrow, with the terminal segment triangular, acute at 

 the apex. Pereiopoda long. 



Length, about one-third of an inch. 



Porcellio pruinostis. BRANDT, Conspectus Mon. Onisc. Bull. Mosc. vi. p. 181. 



KINAHAN, Dublin Nat. Hist. Rev. vol. iv. 1857, 



p. 278, pi. 19, figs. 3, 5, 7, pi. xxi. fig. 1. 

 Porcellio frontalis. LERBBOULLET, Mem. Soc. Hist. Nat. Strasbourg, iv. 



1853 (not of MILNE EDWARDS). JOHNSSON, Syn. 



Framst. Sver. Onisc. p. 30. 

 (Var.?) P.maculicornis. KOCH, Cont. Panz. Heft. 180, n. 16. BUKGERSDIJK, 



Annot. p. 48. 



THIS species, although one of the commonest of our 

 British wood-lice, was first detected by the late Professor 



