A Manual of Conchology / According to the System Laid Down by Lamarck, with the Late Improvements by De Blainville. Exemplified and Arranged for the Use of Students.

by Thomas Wyatt

Formed from the Strombus, being distinct from it by not having the canal at the base shortened or truncated. It greatly resembles the Rostellaria, but the sinus of the right margin is distant from the body. From its digitation or long recurved claws it has often been called the Spider Shell.

Shell oblong-ovate, ventricose, canal elongated, attenuated, and often closed; right margin dilating by age into an expanded, digitated wing, attached to and covering a short spire, with a sinus in the lower part not contiguous to the body.

Pteroceras truncata.

P. lambis.

P. millepeda.

P. pseudoscorpio.

P. scorpio.

P. aurantia.

P. chiragra.

P. chiragra. The Devil’s Claw. Pl. [28], fig. 3.