Vor. IIT] GRINNELL—MAMMALS OF CALIFORNIA 329 
Synonyms—Perognathus panamintinus arenicola Stephens, 
Proc. Biol. Soc. Wash., 13, June 13, 1900, p. 153 (type from 
San Felipe Narrows, eastern San Diego County, California) ; 
Perognathus pericalles Elliot, Field Col. Mus., Zool. ser, 3, 
December, 1903, pp. 252, 253 (type from Keeler, Inyo County, 
California). 
Range—Lower Sonoran and low Upper Sonoran zones in 
the Colorado and Mohave desert region, west to the eastern 
margin of the San Diegan district, and north through the Inyo 
region to the head of Owens Valley (Osgood, N. Amer. 
Fauna, 18, 1900, pp. 29, 30; Mus. Vert. Zool.). 
Perognathus panamintinus brevinasus Osgood 
Short-nosed Pocket Mouse 
Original description—Perognathus panamintinus brevinasus 
Osgood, N. Amer. Fauna, 18, September, 1900, p. 30. 
Type locality—San Bernardino, San Bernardino County, 
California. 
Synonym—Perognathus longimembris, part. 
Range—Lower Sonoran, and low Upper Sonoran zones in 
the San Diegan district, from the Mexican line northwest at 
least to San Fernando Valley, Los Angeles County (Osgood, 
supra cit., p. 31; Mus. Vert. Zool.). 
Perognathus elibatus Elliot 
Mount Pinos Pocket Mouse 
Original description—Perognathus elibatus Elliot, Field 
Col. Mus., zool. ser., 3, December, 1903, p. 252. 
Type locality—Lockwood Valley, altitude 5500 feet, near 
Mount Pinos, Ventura County, California. 
Range—Upper Sonoran zone, in Lockwood Valley, near 
Mount Pinos, Ventura County (Elliot, supra cit.; also ibid., 
March, 1904, p. 307). 
Perognathus pacificus Mearns . 
Pacific Pocket Mouse 
Original description—Perognathus paciicus Mearns, Bull. 
Amer. Mus. Nat. Hist., 10, August 31, 1898, p. 299. 
August 26, 1913. 
