VENUS lentiformis. 
Cytherea, Lam. 
TAB. CCIII. 
Spec. Cuar. Orbicular, depressed, with concen- 
tric, reflected, minute, imbricated, ridges ; 
anterior slope depressed, terminated by an 
angle in the margin. 
Syn. Venus exoleta. Parkinson IIT. 189. 
A. suett that at first sight might be taken for the Venus 
exoleta, from which it is distinguished by the flat space 
upon the anterior slope, and the angle upon the margin. 
The striz are few and much elevated near the anterior 
slope, but soon are doubled, or even trebled, as they pro- 
ceed: upon comparison it is found to be thinner, flatter, 
more closely striated, and rounder on the posterior side. 
The lunette is also more pointed with straight sides. 
From the Crag of Essex and Suffolk, Mr. Parkinson’s 
cabinet. 
