Animal. See Purpura, hereafter.
Shell. Oval or globular, wrinkled; spire middling and pointed; aperture wide, ovate, grooved, and sometimes canaliculated anteriorly; the right edge concave and trenchant; the left nearly straight and marked in the middle with two or three folds; operculum horny. Inhabits the Indian Ocean. One species only is found in America. Forty-nine living species. Twenty fossil.
- Cancellaria crispa.
- C. costifera.
- C. articularis.
- C. brevis.
- C. pusilla.
- C. bullata.
- C. tuberculosa.
- C. pulchra.
- C. cancellata.
- C. similis.
- C. chrysostoma.
- C. rugosa.
- C. hæmastoma.
- C. rigida.
- C. costata.
- C. goniostoma.
- C. trigonostoma.
- C. levigata.
- C. spirata.
- C. obliquata.
- C. scalata.
- C. contabulata.
- C. crenifera.
- C. scalarina.
- C. littoriniformis.
- C. elegans.
- C. asperella.
- C. oblonga.
- C. tesselata.
- C. nodulifera.
- C. cassidiformis.
- C. Australis.
- C. reticulata.
- C. candida.
- C. ovata.
- C. Obesa.
- C. acuminata.
- C. solida.
- C. gemmulata.
- C. decussata.
- C. indentata.
- C. alba.
- C. clavatula.
- C. uniplicata.
- C. mitriformis.
- C. tritonis.
- C. granosa.
- C. piscatoria.
- · · · · ·
- C. buccinoides.*
5. Genus Fasciolaria. Pl. [XI].
Animal. Entirely unknown.
Shell. Separated from the Murex on account of having no varix fusiform or subfusiform; spire middling; aperture oval, elongated, nearly symmetrical, terminated by a rather long, straight tube, the external edge trenchant, the columellar edge having two or three oblique folds. Inhabits the Indian Ocean and Mediterranean Sea. Eight living species. Seven fossil.
- Fasciolaria trapezium.
- F. aurantica.
- F. filamentosa.
- F. coronata.
- F. ferruginea.
- F. tarentina.
- F. tulipa.
- F. distans.
6. Genus Fusus. Pl. [XI].
Animal. Entirely unknown.
Shell. With an epidermis, wrinkled, fusiform or dilated in the middle, prolonged posteriorly by the spire, and still more so anteriorly by the canal; aperture oval; the columellar edge straight or nearly so, the exterior trenchant; a horny and oval operculum. Inhabits the Indian and American seas. Forty-six living species. Thirty-seven fossil.