HELIX. 123 



Occurs fossil in the Natchez Postpleiocene bluff. 



The existence of the tooth within the aperture has been 

 overlooked by all other authors but Binney. The position 

 of the species in the artificial systems is materially altered 

 by its presence. 



Pfeiffer quotes Ferussac's pi. 86, fig. 1, for this species, 

 and places pi. 79, fig. 7, in the synonymy of H. striatella. 

 The former is said by Deshayes to be filiola, a species 

 from Tonga, while the latter was figured from a speci- 

 men furnished by Say himself. 



Potiez and Michaud give Austria as the habitat of per- 

 spectiva, having confounded it with solaria Menke (Gal. 

 p. 99.) 



HELIX MULTIDENTATA Binney, vol. ii. p. 258, pi. xlviii. fig. 3. 



Helix rmtUideniaia Chemnitz, ii. 202. 

 Pfeiffer, iii. 142. 

 Reeve, Con. Icon. No. 729, (1852). 



Found also in Ohio (Anthony), and in Maine (Morse). 



Gould is erroneously quoted as authority for the spe- 

 cific name by all the foreign writers referred to in the 

 synonymy. 



HELIX LINEATA Say vol. ii. p. 261, pi. xlviii. fig. 1. 



Helix lineaUi Say, (Binney's ed.) pp. 9, 24. 

 Chemnitz, ii. 20.3. 

 Pfeiffer, iii. 142. 

 Deshayes, in Fer. i. 80. 

 Reeve, Con. Icon. No. 724, (1852). 



Found also in Virginia, and in "Washington Co., Texas, 

 (Moore.) 



SPURIOUS SPECIES. 



Helix arbustorum Lin. was found some years since in the neighbor- 

 hood of Cincinnati ; it veas living in a situation from which it 



