This genus was formed from the Buccinum, from which it is easily
distinguished; the latter having only a notch at the base, and the
Cassis with a canal abruptly turned towards the back of the shell.
Shell inflated oval, sub-involute, spire very little projecting;
aperture long, oval, sometimes very narrow, terminated anteriorly by a
very short canal, sloped and recurved obliquely towards the back; the
right edge more or less concave, reflected backward, and often dentated
within; the columella covered with a large callosity, denticulated or
wrinkled in all its length; operculum horny.
Cassis cornuta.
C. tuberosa.
C. Madagascariensis.
C. flammea.
C. fascinata.
C. glauca.
C. rufa.
C. pennata.
C. testiculus.
C. achatina.
C. crumena.
C. plicaria.
C. areola.
C. zebra.
C. decussata.
C. abbreviata.
C. sulcosa.
C. granulosa.
C. saburon.
C. canaliculata.
C. pyrum.
C. Ceylanica.
C. semigranosa.
C. vibex.
C. erinaceus.
_C. tuberosa._ The tuberous Cassis. Pl. 28, fig. 5.
Species in which the aperture is long, the external edge almost
straight, and the spire with thickened bands.
_C. flammea._ The flaming Cassis.
Species in which the aperture is sub-oval, and the external edge
excavated; spire short, base triangular; columella rugose; outer lip
thickened.
_C. areola._ The draught-board Cassis.
Smooth, shiny, white, with square orange tesselated spots; spire short
and conical, with decussated striæ; lower part of columella rugose.