ATYDAE 279 



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. 



