480 



ONISCID/E. 



TSOPODA. 



NOBMALIA. 



ONISCIDJS. 



PORCELLIO PICTUS. 



Specific character. Slightly elongated, moderately granulated, upjjer sur- 

 face glossy. Lateral lobes of the cei^halon very prominent, curved outwards and 

 downwards ; the median lobe small and curvilinear. Terminal segment of 

 the pleon triangular, acute at the apex, sulcated above. 



Length, about one-third of an inch. 



PorcelUo pirtus. 



(Var.) P. serialis. 

 (Var.) P. crassicornis. 

 (Var. ?) P. conspersus. 



PorcelUo melanocephalus. 



Brandt and Ratzebukg, Arzne-thiere, ii. pi. 12, 

 f. 5. Conspect. Mon. Onisc. Bull. Mosc. vi. 

 p. 176. Milne Edwards, Crust, iii. 166. 

 KiNAHAN, Dublin Nat. Hi.st. Rev. vol. 4, 1857, 

 p. 278. JoHNSSON, Syn. Framst. Sver. Onisc. 

 p. 22. BuRGERSDijK, Aunot. p. 46. 



Koch, Cont. Panz. Heft. 180, n. 18. 



Koch, Cont. Panz. Heft. 180, n. 19. 



Koch, Cont. Panz. Heft. 180, n. 17. Zaddach, 

 Syn. Crust. Pruss. p. 12 (?). 



ScHNiTZLER, Onisc. Bonn. p. 24 (and Koch ?). 



Finely-marked specimens of this species are amongst 

 the handsomest of the British Isopods. The general 



