69 
CHAMA recurvata. 
TAB. XXVI. — Fig. I. 
Spec. Char. Deep valve conical, curved; beak 
subinvolute. 
The hollow valve is a roundish deep shell, the surface is 
smooth, and the beak turned to one side. Hinge indistinct. 
I have not met with the other valve, but I suppose it to be 
hatter. 
This also is composed of Silex, and is impregnated with 
a coarse ochraceous oxide of Iron. It is from Ilalldown, 
near Exeter, by favour of T. J. L. Baker, Esq. 
CHAMA conica. 
TAB. XXVI. —Fig. 3. 
Spec. Char. Oblong, curved; larger valve deep, 
with a blunt conical beak, and a small wing; 
lesser valve oval, flat, with a crenated margin 
and wing. 
Deep valve mudi larger than the other, about an inch 
long, and three-fourths wide. The hinge is peculiar, 
somewhat resembling a ball and socket. 
