Shell. Oblong, slightly arcuated, thick, callous, and somewhat spiral on both sides, singular in formation, and its characteristic unlike most other shells. Inhabits the Isle of France. Two species.
- Dolabella Rumphii.
- D. fragilis.
2. Genus Aplysia. Pl. [X].
Animal. Body creeping, oblong, convex above; bordered on each side by a broad mantle, which covers the back when the animal is in repose; head and neck elevated, with four tentacula, the two upper ones ear-shaped, eyes situated near the mouth; dorsal shield semicircular, subcartilaginous, adhering on one side, and covering the branchial cavity.
Shell. Nearly round, left margin somewhat reflected; outer lip acute; yellowish horn colored, with brown radiations, and two concentric bands. Inhabits the Indian seas. Thirty-seven species.
- Aplysia depilans.
- A. teremida.
- A. gigas.
- A. hassetlii.
- A. punctata.
- A. marmorata.
- A. dolabrifera.
- A. ascifera.
- A. petalifera.
- A. unguifera.
- A. Limacina.
- A. Jeachii.
- A. saviguana.
- A. fasciata.
- A. bresili.
- A. dactycomela.
- A. protea.
- A. sorex.
- A. tigrina.
- A. maculauta.
- A. longicauda.
- A. Kerandrenii.
- A. lessonii.
- A. camelus.
- A. alba.
- A. Napolitana.
- A. viridis.
- A. longicornis.
- A. ecaudata.
- A. virescens.
- A. poliana.
- A. fusca.
- A. pleii.
- A. citrini.
- A. undata.
- A. rosea.
- A. Ferrusacii.
FAMILY VI.
Limacina. Five genera.
1. Genus Limax. Pl. [X].
Animal. Cuvier merely mentions that the animal is “furnished with a coriaceous, subrogose shield, with a flat, longitudinal disk beneath; four tentacula retractile, eyes at the tips; orifice for respiration on the right side.”
Shell. Ovate oblong, both margins reflected; very thin, diaphanous, slightly wrinkled, of a pale yellow colour. Inhabits the gardens in Britain and France. Five species.