LYMNIDZ OF NORTH AMERICA. 363 
Type Locatity: San Francisco, Cal. 
ANIMAL, JAW, RApULA and GENITALIA: Not examined. 
RANGE: (Figure 40) Washington south to California. A species 
of the Transition life zone and appears to be mainly restricted to the 
Californian and Columbian regions west of the Sierra Nevada range. 
It may have been recorded as palustris from the region between the 
latter and the Rocky Mountains, but no authentic specimens have been 
examined. 
RECORDS. 
CALIFORNIA: Mountain lake near San Francisco, San Francisco Co. (But- 
ton; Cooper; Dall; Hemphill; Dr. Horning; Lea; Rowell; Stearns; Tryon; 
Wood); San Francisco; Lower Klamath Lake, Siskiyou Co. (Gabb); Contra 
Costa Co. (Hemphill) ; Oakland, Alameda Co. (Rowell). 
WasuHincton: Lake Osoyoos, Okanogan River, Okanogan Co. (Cooper). 
Orecon: Dallas, Polk Co. (Stearns). 
GEOLOGICAL DisTRIBUTION: Unknown... 
Ecotocy: Probably the same as that of prosima. 
REMARKS: Galba proxima rowellii appears to be a modification 
of the proxima type rather than of the palustris form. It is easily 
separated from proxima by its more flat-sided whorls and its more 
elongated and narrower aperture. (Compare the figures on the plate.) 
The sutures, also, are less heavily impressed. There are connecting 
links, however, which show its relation to proxima, a notable locality 
being Mountain Lake, near San Francisco. It is liable to be confused 
with elodes, but that species has a rounder aperture and rounder and 
less oblique whorls. It is probable that western references to reflexa 
havc been based on forms of this shell, as no authentic specimens of 
reflexa have been seen from west of the Rocky Mountains. Rowellii 
may be known from long spired specimens of palustris occupying the 
same area, by its more acute spire, with more flat-sided whorls, and 
by its less obese, flat-sided body whorl. 
Tryon’s types in the Philadelphia Academy of Sciences are well 
illustrated by his figures in American Journal of Conch, and in the 
continuation of Haldeman’s Monograph. The material examined 
shows that the variety may be narrower or wider than figured by 
Tryon and the outer lip may flare markedly. (Pl. XX XVIII, figs. 15, 
15.) 
Galba leai (Baker). Plate XXXIX, figures 1-3. 
Lymnaea leat Baker, Nautilus, XX, p. 126, March, 1907—HeEnperson, Univ. 
Colo. Studies, IV, pp. 167, 180, 1907. 
?Limnea nuttalliana INGERsoLL, Bull. U. S. Geol. Surv., I, p. 138, 1875; 
Rep. U. S. Geol. & Geog. Surv. Ter., p. 406, 1876. 
