67 
CHAMA. 
GeNo ChaRo An attached unequal bivalve with 
unequal incurved beaks ; hinge with one thick 
oblique and sometimes crenated tooth; two 
muscular impressions. Often crenated around 
a great part of the inner margin of the shell 
CHAMA haliotoidea* 
TAB. XXV. 
Spec. Char. Flattish; oval; uneven^ with one 
longitudinal curved line outside; and a deep 
curving hollow within the deepest valve., ex 
tending from the beak around one side; the 
remainder very shallow^ margin thin; broad., 
slightly fringed^ crenate within. Muscular 
impression large. 
About an inch and an half long, and an inch broad; 
beaks subinvolute ; anterior side of the upper valve marked 
with a long curved suture, and not fringed, whence it much 
resembles an Haliotis. Under valve attached by nearly its 
whole surface. 
Figs, 1 and 3 represent the under valve; 2 and 4 the 
upper valve ; and fig. 5 the cast of the inside, showing the 
crenated edge* 
