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

Cassidaria echinophora.

C. Tyrrhena.

C. cingulata.

C. striata.

C. oniscus.

C. echinophora. The tuberculated Cassidaria. Pl. [27], fig. 5.

Species oval, sub-globular, canal sub-ascendant, with tuberculated belts or ribs.

C. Tyrrhena. The Tyrrhenian Cassidaria.

Species ovate, grooved transversely, volutions convex; apex with one tubercle; tawny colour.

2. Cassis. The Helmet Shell. Twenty-five species.