PORCELLIO ARMAD1LLOIDES. 



ISOPODA. 



NORM All A. 



485 



ONI SCI DM. 



PORCELLIO ARMADILLOIDES. 



Specific character. Elongate-elliptical. Segments very convex and smooth. 

 Lateral lobes of the front of the cephalon minute, obliquely truncated in 

 front. Central lobe very short, angular, and acute. Terminal segment of 

 the pleon acute, flat above, or slightly convex. 



Length, half an inch. 



Porcellio armadillo ides. LEREBOULLET, Mem. Soc. Nat. Hist. Strasbourg, 



iv. 1853. KINAIIAN, Dublin Nat. Hist. Rev. iv. 

 1857, p. 279. 



DE GEER, Mem. Ins. vii. p. 553, pi. 35, f. 11. 

 JOHNSSON, Syn. Frams. Sver. Onisc. p. 32. 



HARTMANN. 



Oniscus convexus. 



Oniscus saxatilis. 



THIS species is well distinguished by its narrow and 

 almost cylindrical form, reminding the observer strongly 

 of the species of the genus Armadillo. The lobes of the 

 head are but slightly developed, the lateral ones having a 



