105 



in the same position, in V. pygmcea ; and two in 

 V. sexdentata. 



Found in marshy situations in the neighbourhood of 

 Scarborough : whence we have received specimens 

 from our valuable correspondent Mr. Bean. 



86. Vertigo heterostropha. Aperture reversed, 7- 

 toothed, with a rib behind the outer hp. 



Vertigo heterostropha. Leach, Mollusc, p. 130. 

 Pupa Vertigo. Drap. p. 61. t. 3.f. 34, 35. 

 Turbo Vertigo. Mont. 2^' 363. t. 12. f. 6. 



Shell half a line long, pale chestnut-brown, semi- 

 transparent, striolate : spire composed of five much 

 rounded volutions: aperture reversed, somewhat 

 triangular, obliquely truncate, with the peritreme 

 thin, white and slightly reflected, forming an um- 

 bilicus behind the pillar : behind the outer lip is a 

 longitudinal rib, and two or three transverse pale 

 lines, being the reflection of the internal teetli : 

 teeth two above, and five round the mouth, with 

 sometimes an eighth tooth on the pillar-lip. 



In the woods about Scarborough, not uncommon : 

 whence we have received it from Mr. Bean. 



