106 THE NAUTILUS. 



Idaho. 

 Near Franklin (Hemphill). 



Utah. 

 Near Salt Lake City (Yarrow and Hemphill). 



Valvata virens Tryon. 



Valvata virens Trjon, Proc. Acad. Nat. Sci., Phila., 1863, p. 

 148, pi. 1, fig. 11. 



Spire moderately elevated, whorls rounded, umbilicus rather nar- 

 row, sutures moderately deep, shell marked by fine transverse striae, 

 light green to deep green color. 



It has been the custom to refer any western American Valvata of 

 a green color or with an elevated spire to V. virens. The writer 

 does not know of its authentic occurrence north of Clear Lake. 

 Call's Great Basin specimens are V. calli. References to living 

 specimens from northeastern California and southeastern Oregon are 

 probably V. humeralis. 



California. 



* Clear Lake (Tryon, Cooper, Hemphill). 

 Alameda Co. (Cooper). 



Antioch (Carlton). 



* Pond near Watsonville (Laws, Hannibal). 

 ? Willow Creek, Lassen Co. (McGregor). 



Oregon. 

 ? Grant's Lake (Cooper). 



British Columbia. 



? Nanaimo, Vancouver Is. (Dull). 



? Lake Laggan, Rocky Mts. (Taylor). 



Fossil : Santa Clara Beds (Pliocene). 



Gelrich's coal mine, Santa Cruz Mts., Cal. (Cooper). 



* Galabazos Canon, Santa Cruz Mts. (Hannibal). 



Kettleman Beds : 10 miles east of Tulare Lake, west border of 

 Kettleman Plains (Watts). 



Valvata utahensis Call. 

 Valvata sincera var. utahensis Call, Bull. 11, U. S. Geol. Sur., 

 1884, p. 44, pi. vi, fig. 1-3. 



