5 
PECTEN similis. 
TAB: CCV lige. G: 
Spec. Cuar. Suborbicular, depressed, striated ; 
strie arched, diverging; ears unequal; sides 
straight. 
‘Tis differs from the last in having a straight side be- 
neath the larger ear, in being longer, and having no dots 
in the striz ; but at first sight it much resembles it. 
Upon shelly Limestone, probably belonging to the 
Forest Marble, from Shotover Hill, Oxford. 
PECTEN rigida. 
TAB. CCV.—Fig. 8. 
Spec. Cuar. Orbicular, depressed; strongly 
striated; strize arched, diverging ; ears large, 
unequal, decussated. 
A carcer shell than the last, which it resembles, but is 
shorter, and has fewer and deeper striz. 
From Castle Combe, in Forest Marble, by four of 
the Rev. H. Steinhauer. 
