PORCELLIO CINGENDUS. 



ISOPODA. 



NORMALIA. 



489 

 ONISCID^B. 



PORCELLIO CINGENDUS. 



Specific character. Elongate-ovate, smooth or but slightly scabrous, glossy. 

 Lateral lobes of the front margin of the cephalon minute and deflexed ; the 

 median one nearly obsolete. Terminal segment of the pleon broadly trian- 

 gular, flat above, with the apex acute. 



Length, nearly one-third of an inch. 



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

 p. 279, pi. xix. figs. 1, 2, 4, 6, 8, and 9. 



THE minute development of the lateral and frontal 

 lobes of the anterior margin of the head, the narrowness 

 of the segments of the tail, and the broadly triangular 

 terminal segment of that part of the animal, well dis- 

 tinguish this species from most of its congeners ; whilst 

 the smooth shining body, and the rounded postero-lateral 

 angles of the segments of the body, serve to separate it 



