142 



oblong, compressed at the sides, with the apex 

 pointed and near the centre of the shell, inclining 

 towards the narrower end, and turning a little 

 obliquely towards one side. 



In still waters attached to aquatic plants. 



Helix brevipes, we have reason to think, with Mr. 

 Jeffries, is but the young of a species of Vitrina, 

 as the umbilicus is not sufficiently open. 



Bulimus tithe rculatus. Captain Blomcr has surely 

 been mistaken in sending us this species as British. 

 M. De Ferussac, to whose inspection it has been 

 submitted, affirms, that it has never been found 

 within fifteen decjrees of Britain. 



ERRATA. 



p. 9G, last line : for ead read dead. 

 p. 114, hne G from bottom, for also read else. 



