The Conchologist's First Book / A System of Testaceous Malacology, Arranged Expressly for the Use of Schools, in Which the Animals, According to Cuvier, Are Given With the Shells, a Great Number of New Species Added, and the Whole Brought Up, as Accurately as Possible, to the Present Condition of the Science.

by Edgar Allan Poe; Thomas Brown

Vertex, the top of a most prominent part.

Verrucose, warted.

Verticulated, whorled.

Umbilicated, having a depression in the centre.

Umbo, the round part which turns over the hinge.

Undulated, waved.

Ungulata, shaped like a horse’s hoof.

Unilocular, chambered singly.

Univalve, shells of one valve only.

Volutions, the turnings of univalves.