51 
615 Acmea pediculus Philippi. 
Gulf of California to Acapulco, Mexico. 
616 Acmea pelta Eschscholtz. 
Aleutian Islands to Santa Barbara, Cal. 
617 Acmzea rosacea Carpenter. 
Monterey to San Diego, California. 
Synonymy:—Acmea pileolus rosacea Cpr. 
618 Acmea testudinalis Muller. 
Circumpolar—south to England, New York, and Sitka. 
619 Acmea triangularis Carpenter. 
Balenas bay to Monterey, Cal. 
620 Acroloxus nuttalli Haldeman. 
Shell fuscous, oval, elevated, apex % of the entire length from 
one end. Length 8, width 6.25, height 3 mm. 
Living: Snake river, Idaho; Oregon; Washington. 
621 Admete viridula O. Fabricius. 
Circumboreal—south to Massachusetts and Vancouver Island. 
622 olus crassicornis Eschscholtz. 
Sitka, Alaska. 
623 olis subrosaceus Eschscholtz. 
Sitka, Alaska. 
624 Alderia? albopapillosa Dall. 
Sitka, Alaska. 
625 Alexia myosotis Draparnaud. 
Oval-elongate, thin, smooth and shining; spire produced, apex 
acute, suture distinct; whorls 7-8, slightly convex, the last about 
three-fourths of the total length of the shell; aperture long and 
narrow, lip thin, sometimes slightly dentate-ridged within, ap- 
pressed at the base and slightly reflected over the minute per- 
forated umbilicus. A sharp transverse tooth on parietal wall and 
a smaller one above it; columella folded. Dark horn color, 
sutures narrowly banded with red. Length 8, diameter 4 mm. 
Living: Sea coast of New England to New York. Europe, 
(and Asia?). 
626 Var. setifer J. G. Cooper. 
Humboldt bay to San Francisco bay, Cal. 
627 Amnicola dalli Call. 
Mountain streams, Nevada. 
628 Amnicola longingua Gld. 
Shell elongate ovate, horn colored, surface quite smooth; apex 
obtuse; whorls 5, well rounded; sutures deep, aperture elliptical, 
broadly rounded posteriorly; lip simple, copiously incrusting the 
pillar margin, which is profoundly arcuate; umbilical region 
nearly perforate. Length one-eighth, breadth one-tenth inch. 
Living: Utah (Henry Hemphill). 
Quaternary: Cienega Grande, Colorado desert (W. P. Blake). 
Lahontan basin, Lassen county, Cal., Nevada. 
