The shells of this genus are marine, inhabited by mollusca, that, by
frequently moving in and out of the shell while wandering on the shore
in search of food, produce singular callosities on the two edges of the
aperture. They generally resemble the Murex and Buccinum, but are
distinguished by a thickened marginal lip on the right side.
Shell ovate, spire produced; aperture sinuous, terminated at the base by
a very short canal; straight, and without a notch; columellar edge
callous and effuse; right edge with a thickened varix.
Struthiolaria nodulosa.
Struthiolaria crenulata.
_S. nodulosa._ The nodulous Struthiolaria. Pl. 25, fig 1.
Ovate, grooved and striated transversely; top of volutions flattened and
nodulous; cream-coloured, with undulated, brownish-yellow longitudinal
lines; interior of lip yellowish.