196 THE NAUTILUS. 
moderately calloused; adnate portion above very short, somewhat cal- 
loused. Operculum light red, composed of about 3 slowly increasing 
whorls, the nucleus sunken. Alt. 2.7, diam. 2.8, longest axis of aper- 
ture 1.5 mm. 
Ash Meadows, Nye Co., Nevada. 
Like F. fusca in color, and at first referred to that species as a 
stunted local form by Dr. R, E. C. Stearns and myself (see N, A. 
Fauna No. 7, 1893, p. 282); but on renewed examination it was 
noticed that the operculum is very different from that or other known 
members of the genus, in having the latter part of the last whorl far 
narrower, the spiral portion consequently larger, and the nucleus 
nearer the middle. It differs from F. merriami Pils. in the calloused 
inner lip, among other features; and the different operculum and pale 
translucent tint of the shell readily separate it from ‘“ Amnicola” tur- 
biniformis, ‘* Amnicola”’ dalli, and other small varieties ot Fluminicola 
seminalis Hinds. The red color of the operculum seems to be constant, 
and the size varies but little in the large series collected. 
Pomatiopsis californica, n. sp. 
Shell turrited-conic, umbilicate, rather thin, chestnut-brown. Sur- 
face somewhat shining, with slight, irregular growth wrinkles and 
more conspicuous wrinkles or incipient epidermal lamelle at 
unequal intervals, especially on the upper portion. Spire conic, 
the apex slightly obtuse, glossy, generally eroded in adult 
shells. Whorls 53, extremely convex, separated by deep sutures, 
the last whorl short and convex. Aperture vertical, ovate, scarcely 
angular above; peristome continuous, the inner margin less convex 
than the outer, nearly straight where it is in contact with the pre- 
ceding whorl for a short distance posteriorly; edge simple, the col- 
mellar margin a trifle expanded above the umbilicus. Alt. 5, diam. 
3.3, longer axis of aperture 2.14 mm. 
sau Francisco, California (R. E. C. Stearns); Oakland (Beecher 
co 
) 
Two lots of this species are before me from “San Francisco,” one 
received from Dr. R. E. C. Stearns, the collector of the other un- 
known. Another lot (Beecher collection) is from Oakland, collector 
also unknown. Ali were labelled “ P. intermedia Tryon.” 
P. californica resembles the Eastern P. lapidaria and P. hinkleyt 
in color, texture and general appearance. It differs from P. lapidaria 
in being conspicuously wider, less turrited, more Amnzcola-shaped. 
From P. hinkleyi, described from Alabama (NAuTILUS X, 37, Aug. 
