GENERIC CHARACTER.

Animal a Limax. Linn.[[28]] Shell univalve, spiral, gibbous, flattish at the bottom: aperture semi-orbicular and semi-lunar, pillar lip transversely truncated.

*** Perforated with the lips denticulated.

SPECIFIC CHARACTER
AND
SYNONYMS.

Shell thick, glabrous, variously coloured, crown obliterated: lip toothed each side.

* Var. Variegated with white, red, and black.

Nerita Polita: testa crossâ, glabrâ, colore variâ vertice obliterato, labio utroque dentato.

* Ex albo rubro nigroque variegata.

Nerita Polita: testa lævi: vertice obliterato, labio utroque dentato. Linn. Mus. Lud. Ulr. 678. n. 392.

Linn. Syst. Nat. edit. 12. 2. 1254. 731.