132 
MEGALODON cucullatus. 
TAB. DLXVIII. 
Spec. Char . 
A smooth, ovato-lanceolate, thick shell with pointed in- 
curved beaks, the surface is uniformly convex. We have 
not seen a perfect specimen, so cannot describe the po- 
sition of the posterior muscle or tendon ; for the recep- 
tion of the anterior one, there is a sharply excavated 
pit close to the thick plate that supports the hinge teeth. 
For the knowledge of this remarkable shell we are 
indebted to our friend H. T. De la Beche, Esq., who 
obtained the specimens from the limestone of Bradley, 
near Newton Bushel, Devonshire. The decomposed 
state of the stone has much facilitated the development 
of the hinge. The shells accompanying this are Car- 
dium alas forme, Terebratulae, Spiriferae, Buccina, Tur- 
ritellae, &c., — a list of which will be laid before the Geo- 
logical Society by Mr. De la Beche. 
