38 THE NAUTILUS. 



larger size do not seem very dififerent from Seattle specimens of 

 pugetensis. 



BiFIDARIA PENTODON (Say). 



Mill Creek Canyon, alt. 4600 feet (1 specimen, S. S. B., 

 July, 1910). 



BiFIDARIA HEMPHILLI Sterki. 



Waterman Canyon (S. S. B., Nov., 1913), This species does 

 not seem to have been reported previously north of San Diego. 

 It is a common form in this canyon. 



Vertigo modesta parietalis Ancey. 



Common in Bluff Lake Meadow, alt. 7550 feet (S. S. B., 

 July, 1910), and other alpine cienagas. 

 Vertigo modesta castanea Sterki. 



Holcomb Meadows, east of Sugarloaf Peak, at altitude of 8300 

 feet (S. S. B., Aug. 18, 1913). 

 Vertigo ovata (Say) var. 



Mill Creek Canyon, alt. 4600 feet (S. S. B., July, 1910). 



PUNCTUM CONSPECTUM PASADEN.E Pilsbry, 



Walnut Avenue, Redlands (S. S. B., Jan. 21, 1916). 

 Agriolimax campestris occidentalis Cooper. 



Cienagas above Bear Lake, alt. about 7000 feet (S. S. B., 

 Aug., 1910). Determined by Mr. Vanatta. 

 SucciNEA stretchiana Bland. 



Should replace the name <S. oregoneiinis in my former lists. 



Ancylus sp. 



Prospect Park, Pvedlands (A. G. Smith, Dec, 1910); road- 

 side pool, near San Bernardino (S. S. B., Aug., 1911). A 

 small species which it is not yet possible to identify satisfac- 

 torily with any of the named forms. I have not chanced upon 

 any previous records of this genus for the entire southern sector 

 of California. 

 Planorbis opercularis Gould var. 



Marsh at Knight's Ranch, Bear Valley, alt. 6750 feet (Mrs. 

 Kate Stephens, Aug., 1903). The specimens are not typical. 

 According to Dall's synopsis of the races of opercularis in his 

 Land and Fresh Water Mollusks of the Harriman Alaska Ex- 



