PORCELLIO L^VIS. 



ISOPODA. 

 NORM ALIA. 



483 



ONISCIDjE. 



PORCELLIO L.EVIS. 



Specific character. Very convex, smooth. Lobes of the sides of the front 

 of the cephalon slightly prominent, small, and rounded at the outer angle ; 

 middle lohe very short. Terminal segment of pleon rounded at the tip, 

 deeply sulcate down the middle. Uropoda considerably elongated. 



Length, three-quarter.s of an inch. 



PorcelUo loivk. Latreille, Hist. Nat. Crust, et Ins. vii. p. 46 ; Gen. Cr. 

 et Ins. i. p. 70. Lamarck, Anim. s. Yertebr. t. 5, 

 p. 154 (Omscus I.). Milne Edwards, Crust, iii. 

 p. 169. KiNAHAN, Nat. Hist. Rev. vol. iv. 1857, 

 p. 278. White, B. M. Cat. Brit. Crust, p. 72. Pop. 

 Hist. Brit. Crust, p. 237. Johnsson, Syn. Framst. 

 Sver. Onisc. p. 27. Zaddach, Syn. Crust. Pruss. p. 13. 



Cylisticus Icevis. Schnitzlek, Onisc. Agri Bonn. p. 25. 



This is the largest Britisli species of the genus, and 

 is well distinguished by the smooth upper surface of the 

 animal, the small lateral lobes of the face, and the great 



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