In this genus the varices are in longitudinal rows or series, but
alternating, few in number, sometimes only one on each whorl. They are
never spinous or foliated, though frequently plaited or tuberculated.
The Triton variegatus type of this genus is one of the largest spiral
shells.
Shell oval, with spire and canal straight, middling, generally rough,
garnished with varices, rare, scattered, and preserved in longitudinal
rows; aperture sub-oval, elongated, terminated by a short, open canal;
the columellar edge less hollowed than the right, and covered with a
callosity; operculum horny, oval, rounded, and rather large.
Triton variegatus.
T. nodiferus.
T. Australis.
T. lampas.
T. scrobiculator.
T. Spengleri.
T. corrugatus.
T. succinctus.
T. pilearis.
T. lotorium.
T. femoralis.
T. subdistortus.
T. cancellatus.
T. maculosus.
T. clandestinus.
T. pyrum.
T. cynocephalum.
T. tripus.
T. canaliferus.
T. retusus.
T. clavator.
T. tuberosus.
T. vespaceus.
T. chlorostomus.
T. anus.
T. clathratus.
T. rubecula.
T. cutaceus.
T. dolarius.
T. Tranquebaricus.
T. undosus.
_T. variegatus._ The trumpet Triton. Pl. 26, fig. 5.
The smoothest species, oblong, ventricose, tubiform; aperture dilated;
suture of the spire crenulated; pillar lip grooved obliquely; colour
pale purple, clouded and spotted with brown.
_T. cutaceus._ The rough-skin Triton.
Species with spire rather short, always very tuberculated, often
umbilicated; a sinus at the posterior junction of the two edges.
_T. anus._ The grinning Triton.
Species similar to the T. cutaceus, but having the aperture surrounded
by a thin dilated membrane and irregular teeth.
FAMILY XVII.
ALATA. Three genera.