- Cerithium palustre.
- C. telescopium.
- C. nodulosum.
- C. obeliscum.
- C. aluco.
- C. giganteum.
- C. sulcatum.
- C. ebeninum.
- C. vulgatum.
- C. granulatum.
- C. echinatum.
- C. subulatum.
- C. zonale.
- C. tortulosum.
- C. morus.
- C. erythræonense.
- C. radula.
- C. decollatum.
- C. semigranosum.
- C. lineatum.
- C. fasciatum.
- C. muricatum.
- C. crassum.
- C. obtusum.
- C. asperum.
- C. vertagum.
- C. literatum.
- C. heteroclites.
- C. semiferrugineum.
- C. tuberculatum.
- C. ocellatum.
- C. atratum.
- C. eburneum.
- C. lima.
- C. zonatum.
- C. rugosum.
- C. mitriforme.
- C. punctatum.
- C. perversum.
- C. petrosum.
- · · · · ·
- C. exasperatum.*
- C. dislocatum.*
- C. Emersonii.*
- C. Nigrocinctum.*
- C. Greenii.*
2. Genus Pleurotoma. Pl. [XI].
Animal. Body oval, spiral above, enveloped in a mantle of which the right edge is furnished with lobes; foot oval and somewhat short; eyes situated at the external base of long, conical, retractile tentacula; mouth having a long extensible proboscis armed with hooked teeth; organs of respiration formed by two unequal branchiæ.
Shell. Fusiform, a little wrinkled, with a turriculated spire; a small oval aperture, terminated by a straight canal more or less long, with the right edge trenchant; a horny operculum. Distinguished from the Cerithium by having a notch in the margin. Twenty-nine living species. Thirty fossil.
- Pleurotoma muricata.
- P. echinata.
- P. flavidula.
- P. imperialis.
- P. auriculifera.
- P. spirata.
- P. bimarginata.
- P. cingulifera.
- P. Babylonia.
- P. marmorata.
- P. crispa.
- P. nodifera.
- P. maculata.
- P. interrupta.
- P. cincta.
- P. crenularis.
- P. unizonalis.
- P. lineata.
- P. fascialis.
- P. buccinoides.
- P. virgo.
- P. undosa.
- P. tigrina.
- P. albina.
- P. mitra.
- P. elegans.
- P. curvirostris.
- · · · · ·
- P. decussata.*
- P. bicarinata.*
3. Genus Turbinella. Pl. [XI].
Animal. Imperfectly known.
Shell. Usually turbinated (but sometimes turriculated), wrinkled, thick; spire slightly variable in form; aperture elongated, terminated by a straight canal, and often rather short; the left edge nearly straight and formed by a callosity concealing the columella, which has two or three nearly transverse and unequal folds; the right edge entire and trenchant. Found in the Equatorial or Australian seas. Twenty-three species.
- Turbinella scolymus.
- T. napus.
- T. pugillaris.
- T. rapa.
- T. pyrum.
- T. leucozonalis.
- T. cingulifera.
- T. mitis.
- T. infundibulum.
- T. lineata.
- T. triserialis.
- T. ocellata.
- T. rustica.
- T. polygonia.
- T. carinifera.
- T. rhinoceros.
- T. cornigera.
- T. ceramica.
- T. capitella.
- T. globulus.
- T. craticulata.
- T. nassatula.
- T. variolaris.