JOURNAL 



or THE 



Academy of Natural Sciences 



OF 



PHlLAnELPHIV. 



No. 2. JUNE, 1817. Vol. I, 



Description of Seven Species of American Fresh Water 

 and Land Shells^ not noticed in the systems* By Tho- 

 miiS' Say. 



(Concluded.) 



Genus HELIX. 

 Shell subglobose, suborbicular, broader than long; 

 spire convex; aperture wider than long, diminished above 

 by the convexity of the penultimate whorl. 



SPECIES. 



H, Hirsuta, Shell subglobose, brownish, imperfo- 

 rated, covered with short, numerous, rigid hairs; whorls 

 five, but little rounded; suture distinct; aperture very 

 narrow, almost closed by an elongated, lameliiform tooth, 

 situated on the pillar -lip, and circularly joined to the 

 outer-lip at the base. Outer-lip reflected back upon the 

 whorl, and incorporated with it near the base, with a 

 deep sinus in the middle. Breadih one-fourth of an 

 inch. 



Lister, Tab. 93. / 94? 



Inhabits moist places. Common. 



Vol. L B 



