1 
PECTEN cornea. 
TAB. CCIV. 
Spec. Char. Orbicular, much depressed, smooth ; 
ears small, nearly equal ; two obtuse teeth 
near the ears within each valve. 
A tmN fragile shell whose valves are very nearly alike, 
being* both of them very flat and shining : the beak is 
acute ; the ears prominent and well defined ; at the base 
of each within the valves is an oblong blunt tooth : a 
slight difference observable in the relative position of 
these teeth points out the two valves most readily. Well 
preserved individuals retain some traces of the original 
markings ; such are of a deep brown colour with a horn- 
like transparency on the sides, and of an opaque pale 
brown from the front to the beak, near which the colours 
are very distinct : other specimens are altogether of a 
pale brown colour, these are the most tender. 
Found in the Blue Marie stratum below high water 
mark, at Stubbington, in Hampshire. It has much affi- 
nity with Peeten Pleuronectes, but is more slender, and 
otherways distinct* Perfect specimens are very rare, and 
difficult to preserve ; I am therefore much obliged to 
Mr. Holloways for the pains he has taken to procure me 
such as exhibit clearly all the characters. 
