56 
MYTIL, US sublaevis. 
TAB. CCCCXXXIX.- fig. 3. 
Spec. Char. Oblong triangular; rather curved ; 
disk obscurely keelshaped ; front straight- 
ish; beaks acute; lines of growth rather 
prominent 
*Fhe beaks of this are more pointed than those of the 
common Mussel ; it is also flatter towards the front and 
anterior side ; the hinge line is straight, half the length 
of the shell. 
Very imperfect specimens occur in the Cornbrash 
limestone at Felmarshain. 
