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

Refracted, abruptly bent.

Reniform, kidney-shaped.

Replicated, folded or plaited.

Reticulated, formed like a piece of net-work.

Retuse, ending in an obtuse sinus.

Reversed spire, see Heterostrophe.

Revolute, rolled backward.

Ribbed, having longitudinal ribs.

Ridge, the upper part of a slope.

Rostrum, the beak.