38 
VENUS planus. 
TAB. XX.—Lower Figures. 
Spec. Cuar. Rather depressed, subcordate, slightly 
angular towards the anterior side; surface 
smooth; edge entire. 
ne 8 FE 
Asovr two inches and an eighth in length, and two inches 
and three-eighths in width; a strong but not thick shell; 
the cicatrix is lanceolate. 
A dull corneus appearance, with a semitransparency and 
plainness of form, have given rise to the name; it is also 
from Blackdown, by favour of the same Lady as the above. 
The black particles of sand seem to have decomposed into 
a kind of ochre. 
