West Indian Cup-and-Saucer
Distribution: South Carolina to Texas; West Indies to Brazil. Size: 25 mm
Description: Color drab white exterior with orange-pinkish, glossy interior; shell cap shaped; sculpture of somewhat short, thick, diagonal ribs that cross at different angles; protoconch smooth, positioned posteriorly almost to the center of the shell on dorsal margin; possesses an inner cup attached to the underside of the apex, whose outer edges are free from the rest of the shell.
Habitat: Shallow-water species that is frequently found attached to scallops or other mollusks. Shells found at depths from 1 to 115 m (3 to
377 ft).
Remarks: Similar to C. striatum Say, 1824, but edges of the inner cup are free and the edges of the outer shell are crenulate (upper left photo shows animal intact). See Warmke and Abbott (1961); Ode and Speers (1969d); Ode (1983a).