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Genus Haminoea Turton and Kingston 1830 Key to the Atlantic Species (To determine on which side of the apical perforation the lip arises, hold the shell with the apex toward you and the apertural lip facing to the right.) a. Apertural lip arising on the left side of the perforation, and angled near its insertion: b. Shell with numerous fine spiral grooves; % inch; yellowish to whitish; southeast Florida and the West Indies . elegans Gray bb. Shell smooth; % inch; West Indies .... glabra A. Adams aa. Apertural lip arising on right side; not angled: c. Well-grooved spirally: d. Sides of whorls globose; % inch; amber to whitish; Cape Cod to North Carolina; common solitaria Say (pi. 26s) dd. Sides of whorls flattish; % to V2 inch, translucent-white; west Florida to Texas; common succinea Conrad cc. Spiral striae absent or excessively fine; % inch; translucent greenish yellow; globose; Gulf to West Indies . antillarum Orbigny Pacific Coast Species Haminoea virescens Sowerby Sowerby's Paper-bubble Puget Sound to Mexico. Yo inch in length, very fragile, a translucent greenish yellow in color. Aperture very large and open. Upper part of outer lip high and narrowly winged. No apical hole. A common, littoral species on the open coast. H. cy?7ibi^orviis Cpr. and H. olgae Dall are the same. Haminoea vesicida Gould Gould's Paper-bubble Alaska to the Gulf of California. % inch in length, very fragile, similar to virescens, but with a barrel- shaped whorl (from an apertural view), proportionately smaller aperture, with a tiny apical perforation, and with a lower, more rounded wing on the upper part of the outer lip. Shell color much the same, but the thin peri- ostracum is often rusty-brown or yellowish orange. A common, littoral bay species.