CONCHOLOGY. 93 



FAMILY Vri. 



Colimacea. Eleven genera. 



i. (>enus Ifelix. PI. X. 



Animal. Of a slightly variable form, the mantle forming at its 

 free edge a kind of ring or thick collar, especially in front, and 

 faintly divided into two lips ; foot oval, plane, smooth beneath, 

 inflated and granular below, joined to the visceral club by a nar- 

 row peduncle ; head sufficiently distinct ; anterior tentacula very 

 evident and inflated at top, the posterior very long ; the mouth a 

 vertical cleft provided with two labial lobes, a sort of marginal 

 tooth, and with a small, oval, lingual club. 



Shell. The name Helix was given to this genus from the 

 spiral shape of the shell, which varies much in form, but generally 

 globular, and ventricose, conoid but never turriculated ; summit 

 generally obtuse, aperture varying much in size, sometimes very 

 large, sometimes small, always regulated by the turn of the spire ; 

 oval, semilunar, more wide than long, edges disunited, entering 

 little into the interior ; right lip or margin thickened ov reflected. 

 Inhabits the groves and woods of Europe. One hundred antl 

 sixty-eight species. 



Helix vesicalis. Helix cepa. 



H. gigantea. H. heteroclites. 



H. polyzonaUs. H. discolor. 



H. monozonalis. H. lactea. 



H. pulla H. zonaria. 



H. lineolata. H. guttata. 



H. mutata. H. Madagascarensis. 



H. pomatia. H. Javanica. 



H. aspersa. H. Peruviana. 



H. vermiculata. H. simplex. 



H. Alonensis. H. cidaris. 



H. vesicolor. H. citrina. 



H. naticoides. H. algira. 



H. picta. H. verticellus. 



