- Triton variegatum.
- T. lampas.
- T. corrugatum.
- T. lotorium.
- T. cynocephalum.
- T. retusum.
- T. vespaceum.
- T. clathratum.
- T. maculosum.
- T. cutaceum.
- T. undosum.
- T. nodiferum.
- T. scorbiculator.
- T. succinctum.
- T. femorale.
- T. tripus.
- T. clavator.
- T. chlorostomum.
- T. subdistortum.
- T. clandestinum.
- T. dolarium.
- T. australe.
- T. Splengleri.
- T. pileare.
- T. pigrum.
- T. canaliferum.
- T. tuberosum.
- T. anus.
- T. cancellatum.
- T. rubecula.
- T. tranquebaricum.
FAMILY XVIII.
Alata. Three genera.
1. Genus Rostellaria. Pl. [XI].
Animal. Entirely unknown.
Shell. Subdepressed, turriculated, with a produced and pointed spire; aperture oval on account of a rather large excavation of the columellar edge, the right margin dilating with age and having a sinus contiguous to the pointed canal which terminates the shell; an operculum. This genus is distinguished from the Strombus by having a sinus in the lower part of the right margin contiguous to the canal. Inhabits the European seas; four living species. Three fossil.
- Rostellaria curvirostris.
- R. rectirostris.
- R. pespelicani.
- R. cancellata.
2. Genus Pteroceras. Pl. [XII].
Animal. See Strombus, below.
Shell. Oblong-ovate; canal elongated, attenuated and often closed; right margin dilating by age into an expanded digitated wing, attached to and covering a short spire with a sinus in the lower part not contiguous to the body. Distinguished from the Strombus by not having the canal at the base shortened or truncated, and from the Rostellaria by having the sinus of the right margin distant from the body. Found in the Equatorial seas. Seven species. Five fossil.
- Pteroceras truncata.
- P. lambio.
- P. scorpio.
- P. chiragra.
- P. millepeda.
- P. pseudoscorpia.
- P. aurantia.