67 
CHAMA. 
Gen. Cuar. 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. 
CHAM A Haliatiden, 
TAB. XXV. 
Spec. Cuar. 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. 
ee 
Asour 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. 
