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

Valves erect, triangular, acute, with muricated ascending spines.

5. Creusia. Three species.

The shells of this genus are generally small; found in the seas of hot countries attached to madrepore and other marine substances.

Shell sessile, thin, Patella-shaped; aperture oval, rather large, closed by a large sub-pyramidal bivalve operculum; a considerable calcareous support, funnel-shaped, penetrating the bodies to which the animal is attached.

Creusia stromia.

C. spinulosa.

C. verruca.

C. spinulosa. The spiny Creusia.

Very depressed, striated, sometimes with marks of division into four pieces; operculum bivalve.

C. verruca. The warted Creusia. Pl. [4], fig. 2.