HELICIDJE. 205 



b. VERTIGO Mutter. 



Shell cylindrical fusiform, sinistral ; mouth margined 

 externally. 



75. 7. VERTIGO pusilla. Wry-necked Whorl Shell. 



(t. 7. f. 86.) Shell ventricose, attenuated, bald, 

 rather shining, very brittle, pale brown ; whorls 

 five; mouth subquadrate, rounded beneath; 

 plaits six or seven, white, two or three on the 

 column, and four on the lips; peristome thin; 

 umbilicus rather narrow. 



Vertigo pusilla. Muller, Verm. ii. 124.; Alder, 

 Mag. Zool.fyBot. ii. 112.; Jeffreys, Linn. Trans. 

 xvi. 361. 



Jaminia heterostropha. Risso, iv. p. 93. 



Vertigo heterostropha. Leach, Mollusc, p. 130. 



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



Inhab. moist woods, under stones. 



Animal grey, paler beneath ; foot slender. 



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 peristome 

 thin, white, and slightly reflected, forming an umbili- 

 cus behind the pillar ; behind the outer lip is a longi- 

 tudinal rib, and two or three transverse pale lines, 

 being the reflection of the internal teeth ; teeth two 

 above, and five round the mouth, with sometimes an 

 eighth tooth on the pillar lip. 



76. 8. VERTIGO angustior. Narrow Whorl Shell. 



(t. . f. 142.) Shell ventricose, barrel-shaped, 



