Valve, the whole of univalve shells, of shells in one piece; and the
half of bivalves, or shells in two divisions, &c.
Varices, longitudinal ribs in univalve shells.
Variety, is when one species differs some little degree from that of
another.
Vaulted, like the roof of one’s mouth.
Venter, the belly, situated in the body of the shell; being the most
prominent part when the aperture is turned to the observer.
Ventral, belonging to the belly.
Ventricose, inflated, swelled in the middle.
Vermiform, worm-shaped.
Vertex, in the Patella the top or most prominent part, situated in
general nearly in the middle. In the genus Bulla it is used for the
apex.
Verrucose, warted.
Verticulated, whorled.
Umbilicated, having a depression in the centre like a navel.
Umbo, in bivalve shells, the round part which turns over the hinge.