Shell. Oval, more or less ventricose; the first whorls of the spire rounded into a teat; aperture generally much longer than wide and sloping anteriorly; the right edge bent outwardly, entire and soft; the columellar edge garnished with large folds more or less oblique, and slightly varying in number with age. Found chiefly in the seas of the Torrid Zone. Forty-four species.
- Voluta nautica.
- V. armata.
- V. tesselata.
- V. cymbia.
- V. proboscidalis.
- V. diadema.
- V. ducalis.
- V. Neptuni.
- V. olla.
- V. porcina.
- V. pellis-serpentis.
- V. chlorosina.
- V. polyzonalis.
- V. magnifica.
- V. Magellanica.
- V. fulminata.
- V. scapha.
- V. mitis.
- V. Braziliana.
- V. Guinaica.
- V. undulata.
- V. festiva.
- V. Æthiopica.
- V. imperialis.
- V. vespertilio.
- V. musica.
- V. levigata.
- V. nodulosa.
- V. ancilla.
- V. Pacifica.
- V. Junonia.
- V. melo.
- V. Hebræa.
- V. serpentina.
- V. carneolata.
- V. fulva.
- V. nuclea.
- V. Lapponica.
- V. volvacea.
- V. mitræformis.
- V. nivosa.
- V. thiarella.
- V. sulcata.
- V. vexilla.
4. Genus Marginella. Pl. [XII].
Animal. Oval, involuted; foot elliptical, very large, and widest in front, where its edge presents a transverse furrow; head small, distinct, with two long, very sharp tentacula, the eyes at the external part of their base; mouth provided with a trunk.
Shell. Smooth, polished, oval-oblong, a little conical, with a short mammelonated spire; aperture somewhat narrow, slightly oval on account of a light curve of the right edge, which is dilated outwardly; the columellar edge marked with three oblique distinct folds. Inhabits the Indian Ocean. Twenty-four living species and nine fossil, according to Defrance.
- Marginella radiata.
- M. limbata.
- M. lifasciata.
- M. dentifera.
- M. bullata.
- M. avellana.
- M. glabrella.
- M. quinqueplicata.
- M. rosea.
- M. faba.
- M. dactylus.
- M. cornea.
- M. nubeculata.
- M. aurantia.
- M. longivaricosa.
- M. eburnea.
- M. persicula.
- M. tessellata.
- M. cærulescens.
- M. bivaricosa.
- M. muscaria.
- M. formicula.
- M. lineata.
- M. interrupta.
5. Genus Volvaria. Pl. [XII].
Animal. As above.
Shell. Cylindrical, convolute; spire obsolete or concealed; aperture narrow, extending the whole length of the shell, with one or more folds on the lower portion of the columella. Inhabits the Indian Ocean. Seven species.
- Volvaria pallida.
- V. monilis.
- V. miliacea.
- V. triticea.
- V. oryza.
- V. bulloides.
- V. canaliculata.