228 MANUAL OF THE MOLLUSCA. . 
Distribution, 23 species. Red Sea, India, Madagascar, Aus- 
tralia, Pacific. 
Fossil, 21 species. Eocene—. Britain, France, &c. 
Famity [Y.—Conip@, Cones. 
Shell inversely conical; aperture long and 
narrow; outer lip notched at or near the suture ; 
operculum minute, lamellar. 
Animal foot oblong, truncated in front; with a 
conspicuous (aquiferous ?) pore in the middle. Head 
produced. Tentacles far apart. Eyes on the ten- 
tacles. Gills 2. Lingual teeth (wncini ?) in pairs, 
Fig. ae elongate, subulate, or hastate. 
Conus, L. Cone-shell 
Types, ©. marmoreus, Pl. VII., Fig. 1. OC. geographicus, 
antediluyianus, &c. 
Shell conical, tapering regularly ; spire short, many-whorled ; 
columella smooth, truncated in front; outer lip notched at the 
suture ; operculum pointed, nucleus apical. 
Distribution, 371 species. All tropical seas. 
Fossil, 84 species. Chalk—. Britain, France, India, Jaya, &c. 
The cones range northward as far as the Mediterranean, and 
southward to the Cape; but are most abundant and yaried in 
equatorial seas. They inhabit fissures and holes of rocks, and 
the warm and shallow pools inside coral-reefs, ranging from 
low water to 30 and 40 fathoms; they move slowly, and some- 
times (C. aulicus) bite when handled; they are all predatory. 
(Adams.) | 
Sub-genus Conorbis, Sw. C. dormitor, Pl. VII., Fig. 2. 
Eocene—. Britain, France. 
PLEUROTOMA, Lam. 
Litymology, pleura, the side, and toma, a notch. 
Synonym, Turris, Humphrey. 
Types, P. Babylonica, Pl. VII., Fig. 3. P. mitreeformis, &e. 
Shell fusiform, spire elevated ; canal long and straight ; outer 
lip with a deep slit near the suture. Operculum pointed, nucleus 
apical. 
Distribution, 430 species. World-wide. Greenland, Britain, 
17; Mediterranean, 19; Africa, 15; Red Sea and India, 6; 
China, 90; Australia, 15; Pacific, 0? West America, 52; West 
* Fig. 88. Lingual teeth of Bela turricula (after Lovén). 
