The instance referred to is that presented by bivalve shell-fish.
The mother-of-pearl which lines some shells, both univalve and bivalve.
Flattened sideways and as hard as stone, no bivalve can resist it.
Many persons prefer it to the bivalve, when it is cooked properly.
Bivalve shells are said to gape when the margins do not meet all round.
A bivalve is said to be oblique when it slants off from the umbones.
Also to the angular bendings in the margins of some bivalve shells.
Lunule: An impressed area just below the beaks of bivalve shells.
Teeth: Tooth-like projections on the hinge of a bivalve shell.
In Baltimore as many as 10,000 persons are employed in tinning this bivalve.