126 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. 2.3, 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 haying 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 " Amni'cola" tur- 

 biniformis, " Amnicola" dalli, and other small varieties of Flwminicola 

 scminaltK Hinds. The red color of the operculum seems to be constant, 

 and the size varies but little in the large series collected. 

 Pomatiopsis calif ornica, n. sp. 



Shell turrited-conic, uinbilieate, rather thin, chestnut-brown. Sur- 

 face somewhat shining, with slight, irregular growth wrinkles and 

 more conspicuous wrinkles or incipient epidermal lamellae at 

 unequal intervals, especially on the upper portion. Spire conic, 

 the apex slightly obtuse, glossy, generally eroded in adult 

 shells. Whorls 5, 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, diaui. 

 3.3, longer axis of aperture 2.14 mm. 



San Francisco, California (R. E. C. Stearns); Oakland (Beecher 

 coll.) 



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. All were labelled " P. intermedia Tryon." 



P. californica resembles the Eastern P. lapidaria and P. hinkleyi 

 in color, texture and general appearance. It differs from P. lapidaria 

 in being conspicuously wider, less turrited, more ^m/nco/a-shaped. 

 From P. hinkleyi, described from Alabama (NAUTILUS X, 37, Aug. 



