Lamarck formed this genus from the Strombus of Linnæus on account of
having a sinus in the lower part of the right margin contiguous to the
canal. The beak is generally curved, and short in comparison to the
length of the spire, but sometimes it is straight, and equal in length
to the other part of the shell.
The R. rectirostris is one of the most rare shells known.
Shell sub-depressed, turreted, with spire produced and pointed; aperture
oval by the excavation of the columellar edge; the right margin dilating
by age, and having a sinus contiguous to the pointed canal which
terminates the shell.
Rostellaria curvirostris.
R. rectirostris.
R. pes-Pelicani.
_R. curvirostris._ The curved beak Rostellaria. Pl. 27, fig. 2.
Species with the right edge digitated.
_R. pes-Pelicani._ The Pelican’s foot Rostellaria.
Species turreted, with four digitations on the right edge; body and
volutions ribbed longitudinally and crowned with papillæ; flesh-coloured
or white.