CONIDZ. 187 
the tentacles. Mantle enclosed, with an elongate siphon at the 
fore-part. Foot simple, undivided, oblong, with a conspicuous 
aquiferous pore on the middle of the under surface. 
Operculum, when present, rather small, ovate or unguiform, 
with apical nucleus. 
The great family of Cones, characterized by the peculiar 
structure of the mouth, no less than by the similarity in the 
form of the shell, are principally inhabitants of the equatorial 
seas. Haunting the holes and fissures of rocks, and the laby- 
rinths of coral-reefs, they lead a predatory life, boring into the 
shells of other mollusks and sucking the juices from their bodies. 
In the Asiatic region the species seem greatly to predominate, 
whilst but two or three inhabit European seas, and about fifty 
the tropical shores of America. Low-water to 30 or 40 fathoms. 
The teeth of Conus (x, 5) serve for attack or defense. Mr. 
Arthur Adams ( Voy. Samarang, ii, 356) relates that, at the 
Moluccas, Sir Edward Belcher was bitten by a Cone, which sud- 
denly exserted its proboscis as he took it out of the water with 
his hand, and he compares the sensation he experienced to that 
produced by the burning of phosphorus under the skin. The 
bite leaves a small, deep, triangular mark, which is succeeded by 
a watery vesicle. 
Conus, Linn. 
Distr.—About 300 recent sp.,and nearly 100 fossil forms. 
Cretaceous—. C. marmoreus, Linn. (lviii, 42). 
Shell thick, obconic, whorls enrolled upon themselves, the 
spire short, or not elevated, smooth or tuberculated ; aperture 
elongated, narrow, the margins parallel, truncated at the base ; 
the outer lip with a slight sutural sinus. The typical group is 
limited by H. and A. Adams to species with regularly conic 
shell, short or depressed spire and coronated whorls. 
STEPHANOCONUS, Mirch. Spire elevated, sutures concave. C. 
cedonulli, Linn. (lix, 44). 
PUNCTICULIS, Swains. Spire slightly elevated, coronated, last 
whorl ventricose. C. pulicarius, Brug. (Iviii, 43). 
CORONAXIS, Swains. Shella little turbinated, spire elevated, 
convex, coronated. C. vermiculatus, Lam. (lviii, 45). 
CYLINDRELLA, Swains. Cylindrically conic, with revolving 
strie ; spire elevated, concave. C. sulcatus, Brug. (lvili, 46). 
NUBECULA, Klein. (Tuliparia, Swains.) Shell light, subeylin- 
drical; spire short, but pointed at the summit, whorls slightly 
coronated ; aperture effuse, emarginate in front, columella 
smooth ; outer lip with a wide but not deep notch at the suture. 
M. Quoy observes of this group that the foot is very large, 
and not entirely retractile within the shell, as in other members 
of the family; the anterior marginal groove conceals a large 
pore, the aperture of an aquiferous canal; the tubular veil is 
