Fig. 283.—Oliva porphyria Lam., Panama.
Fam. 11. Harpidae.—Foot large, with a transverse groove, separating off a semi-lunar propodium; mantle partly reflected over the shell; shell ventricose, polished; spire short, strongly longitudinally ribbed, ribs prolonged over the suture, columella callous; no operculum. Eocene——. Single genus, Harpa (subg., Silia).
Fam. 12. Olividae.—Propodium semi-lunar, with a longitudinal groove above, mesopodium reflected laterally over the shell; central tooth of radula tricuspid on a very broad base, lateral simple, hooked; shell sub-cylindrical or fusiform, polished; aperture narrow, operculum present or absent. Cretaceous——. Principal genera: Oliva (Figs. [283], and [98], p. 199), Olivancillaria (including Lintricula and Agaronia), Olivella, Ancilla (subg., Ancillina).
(e) Toxoglossa (p. [218]).—Radula with normal formula 1·0·1, teeth large; oesophagus with a large poison gland; animal carnivorous, exclusively marine.
Fig. 284.—Terebra subulata L., Ceylon.
Fig. 285.—Pleurotoma tigrina Lam., E. Indies.
Fam. 1. Terebridae.—Eyes at the end of the tentacles, shell subulate, many whorled, operculum with terminal nucleus. Eocene——. Single genus, Terebra, with several sections.
Fam. 2. Conidae.—Eyes on outer side of tentacles, siphon prominent; shell conical or fusiform, aperture narrow. Cretaceous——. Principal genera: Conus, shell solid, spire short, aperture narrow, straight, internal partitions partly absorbed; Conorbis, Genotia (with several sections, chiefly Tertiary), Pusionella, Columbarium, Clavatula, Surcula, Pleurotoma; Borsonia (Eocene), Drillia (subg., Spirotropis), Bela, Mangilia (including Daphnella, Clathurella, and others), Halia.