PORCELLIO PRUINOSUS. 



ISOPODA. 

 NORM ALIA. 



487 

 ONISCIBjE. 



PORCELLIO PRUINOSUS. 



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. 



PorceUio 2^ruinosns. Brandt, Conspectus Mon. Onisc. Bull. Mosc. vi. p. 181. 



KiNAHAN, Dublin Nat. Hist. Rev. vol. iv. 1S57, 



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

 PorceUio frontalis. Lereboullet, Mem. Soc. Hist. Nat. Strasbourg, iv. 



1853 (not of Milne Edwards). Johhsson, Syn. 



Framst. Sver. Onisc. p. 30. 

 {Yht.'.) P.maculicornis. Koch, Cont. Panz. Heft. 180, n. 16. Bukgersdijk, 



Annot. p. 48. 



This species, although one of tlie commonest of our 

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



