4 
PECTEN laminata. 
TAB. CCV.—Fig. 4 . 
Spec. Char. Suborbicular, depressed, striated; 
striae arched, diverging : ears triangular, un- 
equal ; the largest plaited. 
he striae are slightly undulated; to the naked eye they 
appear smooth, but when carefully examined with a 
lense, minute lines may be traced across them. The 
plaits upon the ear form a strong character, whence the 
name. 
In shelly Limestone (Cornbrash) at Chatley Lodge, 
in Somersetshire. 
PECTEN arcuata. 
TAB. CC V.—Figs. 5 and 7 . 
Spec. Char. Orbicular, depressed, with arched 
punctured and diverging striae upon the sur- 
face : ears large ; the side beneath the largest 
is arched. 
A small shell, prettily marked with arched, dotted, and 
sometimes forked furrows. The ears are dissimilar ; the 
largest is quadrangular ; they are both punctured. 
I have a single valve of this (fig. 7.) in sandstone, 
along with Ostrea gregarea (tab. 111. f. 1 & 3.) from 
Devizes, and another upon Coral rag (fig. 5 *) but not so 
perfect. 
