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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 .
Pacific Coast Species
antillarum
Orbigny
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 barrelshaped
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.