FAMILY XXI.
Convoluta. Six genera.
1. Genus Cypræa. Pl. [XII].
Animal. Oval, elongated, involute; head provided with two very long conical tentacula; eyes at the extremity of an inflation which forms a part of them; a transverse buccal orifice at the extremity of a kind of cavity, at the bottom of which is the true mouth between two thick vertical lips; a lingual band, bristled with small teeth, and prolonged into the abdomen.
Shell. Oval, convex, very smooth, involute; spire entirely posterior, very small, often concealed by a calcareous layer deposited by the lobes of the mantle; aperture longitudinal, very narrow, slightly arcuated, as long as the shell, and with the edges internally dentated, and notched at each extremity. Inhabits the W. Indian seas and Sandwich Islands. One hundred and eighteen species.
- Cypræa princeps.
- C. mappa.
- C. tigris.
- C. pantherina.
- C. mauritania.
- C. stercoraria.
- C. aurora.
- C. leucodon.
- C. sulcidentata.
- C. Arabica.
- C. lynx.
- C. vitellus.
- C. carneola.
- C. cinerea.
- C. Reevi.
- C. obscurus.
- C. achatina.
- C. arenosa.
- C. nivosa.
- C. Broderipii.
- C. exanthema.
- C. cervus.
- C. testudinaria.
- C. talpa.
- C. exusta.
- C. argus.
- C. scurra.
- C. pulchra.
- C. Isabella.
- C. controversa.
- C. lurida.
- C. dediculus.
- C. oryza.
- C. coccinella.
- C. Australis.
- C. Childrini.
- C. depauparata.
- C. solandri.
- C. Californica.
- C. suffusa.
- C. Pacifica.
- C. pediculus.
- C. nivea.
- C. oryxa.
- C. stercus-muscarum.
- C. pulex.
- C. fusca.
- C. Europea.
- C. sanguinea.
- C. quadripunctata.
- C. rufescens.
- C. maugeriæ.
- C. aperta.
- C. Adansonii.
- C. caput-serpentis.
- C. Lamarchii.
- C. Cumingii.
- C. Goodalii.
- C. Humphreysii.
- C. Walkeri.
- C. Listeri.
- C. pulchella.
- C. microdon.
- C. Scottii.
- C. mus.
- C. tessellata.
- C. annulata.
- C. Margarita.
- C. cicercula.
- C. globulus.
- C. staphylæa.
- C. tigrina.
- C. cerina.
- C. Argus.
- C. histrio.
- C. alba.
- C. zonata.
- C. icterina.
- C. lota.
- C. ovulata.
- C. helvola.
- C. Arabicula.
- C. pustulata.
- C. nucleus.
- C. limacina.
- C. moneta.
- C. obvelata.
- C. annulus.
- C. radians.
- C. oniscus.
- C. pyriformis.
- C. piperita.
- C. algoensis.
- C. edentula.
- C. similis.
- C. fusco-dentata.
- C. gangrenosa.
- C. bicallosa.
- C. poraria.
- C. guttata.
- C. Xanthodon.
- C. nigro-punctata.
- C. pallida.
- C. zigzag.
- C. moneta.
- C. aurantia.
- C. fimbriata.
- C. variolaria.
- C. erosa.
- C. miliaris.
- C. ratta.
- C. asella.
- C. turda.
- C. adusta.
- C. moniliaris.
- C. ursella.
- C. hirundo.
- C. olivacea.
2. Genus Ovula. Pl. [XII].
Animal. As above.
Shell. Oblong, convex, distinguished from the Cypræa by the want of a spire, and by not having teeth on the columellar lip; the two extremities of the aperture notched, and more or less prolonged like a tube; left margin dentated. Inhabits the Indian seas. Twelve species.
- Ovula oviformis.
- O. carnea.
- O. verrucosa.
- O. spelta.
- O. angulosa.
- O. hordacea.
- O. birostris.
- O. gibbosa.
- O. volva.
- O. lactea.
- O. triticea.
- O. acicularis.