Ceratostoma monoceros is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
References
External links MNHN, Paris: syntype Sowerby, G. B., I; Sowerby, G. B., II. (1832-1841). The conchological illustrations or, Coloured figures of all the hitherto unfigured recent shells. London, privately published