Polinices bifasciatus
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| Polinices bifasciatus | |
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| Showing aperture | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Naticidae |
| Genus: | Polinices |
| Species: | P. bifasciatus |
| Binomial name | |
| Polinices bifasciatus (Gray in Griffith & Pidgeon, 1833) | |
| Synonyms | |
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Polinices bifasciatus, or two-banded moon snail, is a species of gastropod mollusc. The animal was first described to science in a work authored by English biologists Edward Griffith and Edward Pidgeon.[1] This was a multi-volume translation of George Cuvier's, Le Règne Animal (1830). The Griffith and Pidgeon work went beyond translation and added a supplement that included the description of Polinices bifasciatus. The description of Polinices bifasciatus is attributed to John Edward Gray.[2] It reads, in its entirety, "Pale brown, with two narrow bands".
The shell is smooth. The exterior is tan or light brown with two widely separated, narrow white bands. There are about four whorls and a low spire. The shell has a large aperture. The shell is a darker brown at the inside edge of the aperture. The interior is white. The shell reaches a height of 40 mm (1.6 inches) and a diameter of 26 mm (1 inch). The operculum is brown.[3][4]