114 
1590 Pupa (Pupilla) muscorum L. 
Montana. A var. from Nevada. 
1591 Pupa (Pupilla) blandi Morse. 
Montana—Rocky Mts. 
1592 Pupa (Pupilla) signata Mouss. Rocky Mts. 
1593 Pupa hebes Ancey. 
Shell rimate, cylindrical, bluntly rounded at both ends, thin, 
light chestnut colored, not glossy, very slightly striate; whorls 
6144, the earlier 3 rapidly increasing, the rest of about equal 
width, quite convex, the last whorl ascending in front, its latter 
third somewhat compressed, the base showing a blunt projection 
when viewed in profile; a decided contraction behind the outer 
lip, but scarcely any crest; aperture truncate-oval, slightly 
oblique, without lamelle or folds, though there is a slight projec- 
tion on the columella, far within; peristome thin, narrowly ex- 
panded, not in the least thickened within; length 3.5, diam. 1.8 
mm.—Pilsbry & Vanatta. 
Type locality:—-White Pine, Nevada.—Near Jerome, Arizona 
(Ashmun). 
1594 Pupa (Pupilla) sublubrica Anc. Rocky Mts. 
1595 Pupa (Pupilla) sterri Voith. (?7Rocky Mts.) 
1596 Pupa (Pupilla) Sterkiana 
Pilsbry, Phila ac pr 1889, t 12, f 2-3. 
Shell rimate, perforate when young, cylindrical, blunt at both 
ends, chestnut-brown; surface obliquely sculptured with strong, 
rather irregular costule, which often split or branch, suture very 
deeply impressed; whorls 7, the first one smooth, the last 5 of 
about equal diameter, very convex; last whorl a little ascending 
to the aperture, without crest or scrobiculation behind the peri- 
stome; aperture a trifle oblique, rounded, truncate above; lip 
expanded, continuous, thin, white, without teeth or folds; um- 
bilicus deeply impressed, appearing very narrowly perforate. Alt. 
4, diam. 1.5 mm. On Roccella leucophcea both north and south 
of San Quintin bay, Lower California (C. R. Orcutt No. 1322), 
and first distributed as P. chordata Pfeiffer. Named in honor of 
Dr. V. Sterki, whose special studies of these minute species has 
added much to our present knowledge. 
1597 Pupa syngenes Pilsbry. 
‘Shell subcylindrical but wider above, composed of 8 narrow, 
convex whorls, sinistrally convoluted; texture as in P. mus- 
corum, but color rather lighter brown. Last whorl ascending, 
imperforate, bearing a strong high crest just behind the outer 
lip. Aperture shaped as in muscorum, having a single small 
parietal denticle. Alt. 3.75, diam, 1 2-8 mm.’’—Pilsbry, Nau- 
tilus 4:3 (May 1890). 
Type locality:—‘‘Arizona.’ Beaver Creek, Montana. 
1598 Pupa (Leucochila) fallax Say. 
All eastern U. S. to Arizona in the southwest. 
1599 Pupa (Columella) edentula alticola Ing. 
Rocky Mts. Another var. from Wash. and Alaska. 
