THE 
HEART CHAMA. 
Generic Character. 
Animal allied to a Tethys. 
Shell bivalve, strong. 
Hinge with a gibbose callus obliquely inserted 
into an oblique fossule. 
Specific Character, &c. 
CHAMA with smooth roundish shell, with re- 
curved tips, and gaping orifice. 
The Smooth OX-HEART CHAMA, 
The present shell is a native of the European 
seas, and is sometimes found of a larger size than 
represented on the annexed plate. 
