4. Marginella. Twenty-four species.

Distinguished from the Voluta, from which it was taken, by having the

outer lip thickened.

Shell smooth, polished, ovate, oblong, sub-conic, spire short and

papillary; aperture narrow, sub-ovate, by a light curve of the right

edge, which is inflated or reflected, slightly notched anteriorly; the

columellar edge marked with three distinct oblique plaits.

Marginella glabrella.

M. radiata.

M. quinqueplicata.

M. limbata.

M. rosea.

M. lifasciata.

M. faba.

M. dentifera.

M. dactylus.

M. bullata.

M. cornea.

M. avellana.

M. nubeculata.

M. cærulescens.

M. aurantia.

M. bivaricosa.

M. longivaricosa.

M. muscaria.

M. eburnea.

M. formicula.

M. persicula.

M. lineata.

M. tessellata.

M. interrupta.

_M. lineata._ The lineated Marginella. Pl. 30, fig. 3.

Species with aperture as long as the shell; spire not projecting,

sometimes sunk or umbilicated.

_M. faba._ The Bean Marginella.

Species with aperture shorter than the shell, and the spire projecting.

_M. cærulescens._ The cerulean Marginella.

Species with surface bluish white; spire short and acute; four plaits on

the columella; interior lip brownish purple.

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 223 / 258 题