BULIMUS. 43 



H. PYGMJEA. Draparnaud. PL VI, fig. 34. 



Shell minute, rather convex, of a pale brown colour; umbilicus large. 



Zonites pygmaeus, Gray. 



This shell differs from the former in being smaller, 

 having the spire much more depressed, being more 

 transparent, and of a pale colour. It is like the former 

 marked with regular longitudinal striae. Whorls three 

 and a half to four, which are deeply defined. Diameter 

 less than one line. 



Hob. There is every reason to believe this delicate 

 little shell is generally diffused over the British Isles ; 

 but on account of its being so very minute, and of a 

 colour generally resembling the soil it inhabits, it prob- 

 ably has been overlooked in many districts. Unlike 

 the former species, it delights in damp situations, 

 amongst dried leaves and decayed vegetable matter. 

 Often found at the roots of grass in a moderately damp 

 field. 



We reject H. liinbata as spurious, on the authority 

 of Professor Forbes and S. Hanley. It is a continental 

 species. The few specimens which have been found, 

 were probably introduced with foreign plants. 



BULIMUS. Scopoli. 



Shell Spiral, oblong, unpolished, aperture oval, devoid of 



teeth ; colwnella entire. 

 Animal Similar to that of Helix. 



B. ACUTUS. Mutter. PI. VII, fig. 1. 



Turreted, conical, white or clear brown, generally banded ; peris- 

 tome thin, scarcely reflected. 



This beautiful turreted little snail is gregarious in its 

 habits, and locally distributed, being partially if not 

 exclusively confined to calcareous soils. It varies much 

 in colour, being sometimes nearly white and sometimes 

 a light brown, in both cases with the bands more or less 

 perceptible. It is very similar to virgata in its habits. 

 Indeed the distinction between the Bulimi and Helices 

 is nothing more than a little difference in the conform a- 



