81 
PECTEN vimineus. 
TAB. DXLIIl.—fgs. 1 & 2. 
Spec. Cuar. Convex, rather longer than wide, 
concentrically striated ; ribs about 20, promi- 
nent, closely beset with thick elevated scales, 
which are less numerous upon the left valve ; 
ears nearly equal. 
Syn. P. varius. Geol. Survey of the Yorkshire 
Coast, p. 233. t. 9. fig. 9. excl. Syn. 
A Few of the ribs are obscurely tripartite towards the 
edge, the rest are very round and (especially upon the 
left valve where they resemble rods of wire) much ele- 
vated. About 2 inches wide and 23 long. It differs from 
the recent P. varius in the number and size of the ribs, 
the thickness of the scales, and the disposition of the 
striz between the ribs. Some specimens have small ribs 
between the principal ones. 
Plentiful in, and indeed characteristic of, the Oolitic 
Limestone of Malton. It also occurs at Ely, and in Glou- 
cestershire. 
