367 

 GEN. XXVIII. 



HELIX. 



Animal a LIMAX. 

 SHELL, univalve, fpiral, fub-diaphanous, fragile. 



Aperture contra6ledj either fub-rotundj or femi- 

 lunart. 



*OVATE, OR TURRITED. 



Helix ftagnalis. Lin. Syjl. p.l249.— Gw/. .S>^.p.3657.l2S. Stagnalis.' 



Chan. Conch, ix. t. 135. f. 1237. 1238. Tab. 16. f. 8. 



Midler Verm. ii. p. 132. No. 327. 



Liji. Conch. 1. 123. L2\.—Id. Angl t.2.f.21 . 



Schroet. Flujfconch. p.304. t.7. f. 1. to 4. — t. 



Min. C.i.l. 



Helix 



^ t The very great connexion between the Turho and Helix of the Linnoean 

 genera, has frequently occaiioaed a removal of fpecics from one to the other. 

 Indeed, if none were to be placed in the former, but what had the aperture 

 ftrictly orbicular, and entire ; nor in the latter, any but thofe polfeiling afub- 

 lunar or roundifh mouth, we fliould be at a lofs where to place a great many 

 fpeciesof both thefe genera. We have, however, followed the Svvedifti natu- 

 ralift pretty clofely, except in a few inllances ; particularly that of placing 

 all the deprelled fpecies without any regard to the fliape of the mouth, in the 

 Helix genus. 



