1. Columbella. Eighteen species.

The shells of this genus are short, small, and rather thick; found in

the seas of hot countries.

The C. mercatoria is very common on the shores of the Atlantic in warm

latitudes, and was formerly used as money.

Shell thick, turbinated; spire short, obtuse; aperture narrow,

elongated, terminated by a very short canal or notch, rendered narrow by

an inflation at the inner side of the right edge, and by some plaits on

the columella; a very small horny operculum.

Columbella strombiformis.

C. rustica.

C. mercatoria.

C. Hebræa.

C. flavida.

C. semipunctata.

C. bizonalis.

C. reticulata.

C. pardalina.

C. scripta.

C. ovulata.

C. nitida.

C. zonalis.

C. fulgurans.

C. mendicaria.

C. turturina.

C. punctata.

C. unifascialis.

_C. strombiformis._ The Strombus-shaped Columbella. Pl. 29, fig. 6.

The type of this genus, partly characterized by its name.

_C. mercatoria._ The merchant Columbella.

Ovate, white, sulcated, transversely clouded with brown or yellow; outer

lip dentated internally.

A Manual of Conchology According to the System Laid Down by Lamarck, with the Late Improvements by De Blainville. Exemplified and Arranged for the Use of Students. · 第 220 / 258 题