326 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER. 
Range—Lower and Upper Sonoran zones on the Mohave 
Desert, north through the Inyo region, south to north base 
of San Bernardino Mountains, west to Antelope Valley, in 
northern Los Angeles County (Mus. Vert. Zool.). 
Thomomys albatus Grinnell 
Imperial Valley Pocket Gopher 
Original description—Thomomys albatus Grinnell, Univ. 
(Calne Jebiok Zoolk, Woy Iie 7, IOIZ. oro WAZ. 7S) 
Type locality—California side of lower Colorado River at 
the old Hanlon Ranch, near Pilot Knob, Imperial County. 
Synonyms—Thomomys fulvus, part; Thomomys perpal- 
lidus, part. 
Range—Lower Sonoran zone in the delta area on the 
Colorado Desert in Imperial County, from near Pilot Knob 
west to Carrizo Creek and north to Salton Sea (Grinnell, 
supra cit., pp. 173, 174). 
Thomomys perpallidus Merriam 
Palm Springs Pocket Gopher 
Original description—Thomomys talpoides perpallidus Mer- 
riam, Science, 8, December 24, 1886, p. 588. 
Type locality—Palm Springs, Riverside County, California 
(see Stephens, Calif. Mammals, 1906, p. 138). 
Synonyms—Thomomys fulvus perpallidus; Pallid Pocket 
Gopher ; Pale-colored Gopher. 
_ Range—Lower Sonoran zone at extreme northwest border 
of Colorado Desert in vicinity of Palm Springs, Riverside 
County (Grinnell, Univ. Calif, Publ. Zool., 10, 1912, p. 173). 
Thomomys cabezonae Merriam 
Cabezon Pocket Gopher 
Original description—Thomomys cabezonae Merriam, Proc. 
BHO Storey Weisinns Nah rey WO MOOI, yey JUNO) 
Type locality—Cabezon, San Gorgonio Pass, Riverside 
County, California. 
Range—Lower and Upper Sonoran zones in San Gorgonio 
Pass and adjacent foothills, Riverside County (Mus. Vert. 
Zool.). 
