VOLUTID. 61 
Genus, COLUMBELLA—Lamark. 
Shell ovato-oblong, triangular or fusiform ; spire acute at the apex ; 
aperture long narrow, contracted in the middle; inner lip curved, 
crenulated or denticulated ; outer lip dentate, gibbous, thickened in the 
middle. . 
C. zebra, Gray; Reeve, Conch. Ic., f. 72. Shell oblong, some- 
what pyramidal, smooth, fulvous, conspicuously striped longitudinally 
with chestnut; aperture rather broad, lip slightly thickened within, 
faintly denticulated (Reeve.) 
C. choava. Reeve; Conch., lc., f 239; Pyrene flexuosa, Hutton, 
Jour. de Conch., 1878, ~. 23. Shell ovate, smooth, yellowish, freckled 
with chestnut brown ; spire obtuse ; whorls convex ; aperture small ; lip 
simple, faintly notched at the upper part (Reeve.) 
A small olive-brown shell, mottled with somewhat obscure waved 
marks of chestnut-brown (Reeve.) Auckland. 
A black variety appears to be nearly as common as the type. The 
teeth on the outer lip are often obsolete, thus bringing it into the genus 
Pyrene. 
Sub-Section—Rhachiglossa. 
Radula with rachis plates only ; head as in Hamzgdossa. 
FAMILY—-VOLUTID. 
Lingual teeth in a single central series, often toothed ; head large, 
with the eyes sessile on the sides below the base of the tentacles ; ten- 
tacles far apart, united by a broad veil over the head ; mantle sometimes 
greatly developed, covering the sides of the shell; siphon re-curved, 
short, with auricles on each side of the base ; foot very large, partly 
hiding the shell; operculum none. Shell with distinct plaits on the 
columella ; apex of spire mamillated. 
Sub-Family— Volutine 
Teeth linear, with a single conical apex, the base angularly diverging; 
mantle margin included, not covering the sides of the shell. 
Genus, VOLUTA—Linneus. 
Shell oval or fusiform ; spire more or less produced ; aperture large, 
without a canal. 
V. pacifiea, Zamoark, lc. x, 399; O. & G., i, p. 625; pF aa, 
f.6; V. arabica, Gml.; Chenu, f. 971. Shell ovato-fusiform ; whorls 
rather flattened in the adult, with a row of tubercles increasing in size 
anteriorly ; shell rather thin; aperture large, widening anteriorly ; col- 
umella with four or five plaits ; fulvous with dark brown or blackish, 
angular, flexuous, anastomosing, transverse markings, which being thicker 
I 
