f 



166 



PARMACELLA. 



Cuvier t Ann. duMus. 5, p. 442, pi. 29,/. 12, 15. 



A terrestrial mollusca, nearly allied to the Slug, 

 and discovered by Olivier in Mesopotamia; its organs 

 of respiration, however, are defended by a fleshy shield, 

 in the thickness of which is a solid crustaceous body, 

 assuming the form of a shell. In Sowerby's Genera, 

 No. 13, plate 4, this shell is figured and described. 

 Parmacella Olivieri. 



LIMAX. 

 limax rufus. — Linn. 



A naked terrestrial mollusca or common slug, on 

 whose back exists a tough or fleshy shield, beneath 

 which the animal screens its head and a portion of the 

 body when contracted, containing, in its internal part, a 

 small flat detached osseous substance, not exhibited on 

 the exterior surface, and in some instances only compos- 

 ed of corpuscular grains, or elementary parts of bone. 



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