The umbilicus of this species is rather narrow and usually open, but the specimen from G-866 has the umbilicus filled with callus, leaving only a pit-like umbilical depression. Abbott (1974) suggests that this is only a form of C. psyche. However, C. hendersoni can easily be distinguished from C. psyche by its generally open umbilicus, smooth basal cords and completely different radula (see Clench & Turner, 1960: pi. 7, figs. 1 & 4). The two species are also found in the same geographical area (the Florida Keys) and the same depth range (about 200 m). I must therefore consider C. hendersoni a distinct species.

C. hendersoni is found only along the Florida Keys, from off Alligator Reef (Bayer, 1971) to SE of Key West.
Bathymetric range: This species has a possible depth range of 133 to 288 m, but seems to be found most frequently near 200 m.