169 



4 



HELIX. 



helix pom ati a. — Linn. 



Chem.9$, table 96, 128, Jfy. 1138. A. B. C. 



The shells of this genus are terrestrial, and the families 

 of them innumerable; all parts of the globe not covered 

 with water affording nutriment to the immense variety 

 of different species, which every where abound. Their 

 number, diversity, and beauty can only be equalled by 

 some classes of Entomology, in which a similar extent of 

 species is observable. Lamarck has pointed out the in- 

 dispensable necessity of making considerable and im- 

 portant divisions of the G. Helix of Linnaeus, which he 

 has therefore separated into the genera Helix, Auricu- 

 la, Carocolla, Cyclostoma, Planorbis, Achatina, Anosto- 

 ma, Ampullaria, Bulimus, Janthina, Paludina, Pupa, 

 Lymnaea, Succinea, Sigaretus, some of the Naticae, &c. 

 each of which possesses consistent, natural, and charac- 

 teristic generic distinctions, sufficiently strong and pre- 

 cise, most fully to authorize their separation and dis- 

 tinct classification from the G. Helix of Linnaeus, in 

 which they were blended and confounded together in 

 strange disorder; the marine, land, and fresh water 

 species, so intermixed, both with regard to the habi- 





