This genus of shells has two rows of varices or thickened bands,
arranged on either side in rows, so that it forms a distinct division
between the Struthiolaria and the Murex.
Shell oval, as if depressed by the preservation of each side of a
longitudinal thickened band; aperture oval, almost symmetrical by the
excavation of the columellar edge, terminating anteriorly by a short
canal, often a little sloping; a sinus at the posterior junction of the
two edges.
Ranella gigantea.
R. leucostoma.
R. candisata.
R. Argus.
R. ranina.
R. spinosa.
R. bufonia.
R. granulata.
R. granifera.
R. semigranosa.
R. bitubercularis.
R. crumena.
R. anceps.
R. pygmæa.
_R. ranina._ The froglike Ranella. Pl. 25, fig. 2.
Species not umbilicated.
_R. granulata._ The granulated Ranella.
Species not umbilicated.
_R. spinosa._ The prickly Ranella.
Species of which the varices have elongated spines; beak sulcated; outer
lip internally crenated; acute, short, distinct muricated tubercles;
fawn coloured.