East coast marine shells; descriptions East coast marine shells; descriptions of shore mollusks together with many living below tide mark, from Maine to Texas inclusive, especially Florida . eastcoastmarines00rome Year: 1937 EAST COAST MARINE SHELLS 147 smooth; grayish with brovm bands; whorls ten; aperture narrow, angular, lip acute. Length mm. PI. 55, Fig. 5 PI. 67, Fig. S Tampa Bay, Florida to Florida Keys GENUS DETRACIA Gray 1840 DETRACIA BULLOIDES Montagu. Shell heavy, thick, shining, brownish with white revolv- ing bands; whorls ten, tapering toward base; six to eight elongated ridg
East coast marine shells; descriptions East coast marine shells; descriptions of shore mollusks together with many living below tide mark, from Maine to Texas inclusive, especially Florida . eastcoastmarines00rome Year: 1937 EAST COAST MARINE SHELLS 147 smooth; grayish with brovm bands; whorls ten; aperture narrow, angular, lip acute. Length mm. PI. 55, Fig. 5 PI. 67, Fig. S Tampa Bay, Florida to Florida Keys GENUS DETRACIA Gray 1840 DETRACIA BULLOIDES Montagu. Shell heavy, thick, shining, brownish with white revolv- ing bands; whorls ten, tapering toward base; six to eight elongated ridges inside but not quite reaching outer lip. Length 11 mm. On Big Pine, one of the lower Flor- ida keys, Detracia lives under stones and bits of wood not far from the ocean beach. PI. 55, Fig. 1 PI. 67, Fig. 7 Cedar Keys, West Florida to Florida Keys GENUS SAYELLA Dall 1885 SAYELLA CROSSEANA Dall. Length mm. PI. 67, Fig. 10 Egmont Key, Florida; West Indies SAYELLA HEMPHILLII Dall. Length mm. PI. 67, Fig. 11 Cedar Keys, Florida GENUS BLAQNERIA Shuttleworth 1854 BLAUNERIA HETEROCLITA Montagu. PI. 67, Fig. 14 Tampa, Florida to West Indies; Europe Family Piliidae The 'apple snails' are fluviatile. The breathing cavity being partly closed they are able to remain out of water for long periods, even years in times of drought. The animal's tentacles are long, the lips so modified that they resemble an additional pair of tentacles. On the left side of the mantle is a long siphon; large pulmonary sac on each side of mantle cavity; operculum usually completely closing aper- ture. In the mightiest of rivers sucn as the Amazon and its tributaries, the Ganges, and the Nile, live the largest and finest species. A South American bird has a beak especially designed for entrance under the operculum of a Pomacea. GENUS POMACEA Perry All of the species which inhabit the Western Hemisphere are provided with a horny operculum and are placed under this genus. POMACEA PALUDOSA Say. Spire of sh
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