OF NORTH AMERICA. 363 



TYPE LOCALITY : San Francisco, Cal. 



ANIMAL, JAW, RADULA 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). 



WASHINGTON: Lake Osoyoos, Okanogan River, Okanogan Co. (Cooper). 



OREGON: Dallas, Polk Co. (Stearns). 



GEOLOGICAL DISTRIBUTION : Unknown. 



ECOLOGY : Probably the same as that of proximo,. 



REMARKS: Galba proximo, rotvcllii appears to be a modification 

 of the proximo, type rather than of the palustris form. It is easily 

 separated from proximo, 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 proximo, 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 

 ha\c 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. (PI. XXXVIII, figs. 15, 

 19.') 



Galba leai (Baker). Plate XXXIX, figures 1-3. 



Lymn&a leai BAKER, Nautilus, XX, p. 126, March, 1907. HENDERSON, Univ. 

 Colo. Studies, IV, pp. 167, 180, 1907. 



tLimnaa nuttalliana INGERSOLL, Bull. U. S. Geol. Surv., I, p. 138, 1875; 

 Rep. U. S. Geol. & Geog. Surv. Ter., p. 406, 1876. 



