Marine shell, sometimes confounded with the Cassis, but distinguished by
the canal which terminates the aperture being ascendant, very little
arched, and not suddenly recurved.
Shell sub-globular, ventricose, tuberculated, or fluted; spire short and
pointed; aperture long, oval, sub-canaliculated anteriorly; the right
edge effuse and folded back; the columella covered over with a broad,
smooth callosity, uniting behind to the right edge; operculum horny.
Cassidaria echinophora.
C. Tyrrhena.
C. cingulata.
C. striata.
C. oniscus.
_C. echinophora._ The tuberculated Cassidaria. Pl. 27, fig. 5.
Species oval, sub-globular, canal sub-ascendant, with tuberculated belts
or ribs.
_C. Tyrrhena._ The Tyrrhenian Cassidaria.
Species ovate, grooved transversely, volutions convex; apex with one
tubercle; tawny colour.