Cassis, a genus closely allied to Cassidaria, with a shorter siphon canal and with a closing lid. It is a much larger genus, with 42 living species, but with fewer (25) known fossils in the Tertiary epoch. Some large species are used for cameos. See HELMET-SHELL.
Cassis
Chambers's Encyclopaedia, Volume 2: Beaugency to Cataract, p. 811
Source scan(s): p. 0828