145 
PECTEN dentatus. 
TAB. DLXXIV.—fig. 1. 
Spec. Cuar. Nearly orbicular, convex, minutely 
striated concentrically, ribbed ; ribs about 
twenty close, large, angular, obtuse ; ears 
defined, small; margin deeply toothed ; valves 
similar. 
Tue peculiar characters of this Pecten are, the sharp 
projection of the edge between each rib and the flat in- 
clined sides of each rib. 
Several specimens of this fossil are in the collection of 
Miss Baker, who found them in transported fragments 
of limestone, in what are there called gravel-pits, at 
Bugbrook and Staverton, in Northamptonshire. It also 
occurs in the valley of Catmus in Rutlandshire. The 
figure is taken from a specimen which has both valves, 
but wants the ears; they are supplied from another, in 
other respects inferior, individual. 
