Vor. III] GRINNELL—MAMMALS OF CALIFORNIA 323 
ing. An immigrant from Europe. | In west-central California 
a variation has appeared, of possible phylogenetic importance 
(Dice, Science, n. s., 35, 1912, pp. 834-836). 
Family GEOMYIDAE 
Thomomys bottae bottae (Eydoux and Gervais) 
California Pocket Gopher 
Original description—Oryctomys (Saccophorus) bottae 
Eydoux and Gervais, Mag. de Zool., Hel Ssou pe oy plate 
Type locality—Coast of California: Monterey (see Allen, 
Bull. Amer. Mus. Nat. Hist., 5, 1893, p. 57). 
Synonyms—Thomomys talpoides bulbivorus; Thomomys 
bulbwworus. 
Range—Upper Sonoran and Transition zones in the San 
Francisco Bay region, south along the coast to Ventura County, 
and north at least through Marin County; east into Contra 
Costa County (Mus. Vert. Zool.). 
Thomomys bottae pallescens Rhoads 
San Diego Pocket Gopher 
Original description—Thomomys bottae pallescens Rhoads, 
Proc. Acad. Nat. Sci. Phila., March 19, 1895, p. 36. 
Type locality—Grapelands, San Bernardino County, Cali- 
fornia. . 
Synonym—Southern Pocket Gopher. 
Range—Lower and Upper Sonoran zones in the San Diegan 
district, from the Mexican line northwest into Ventura County 
(Mus. Vert. Zool.). 
Thomomys bottae laticeps Baird 
Humboldt Bay Pocket Gopher 
Original description—Thomomys  laticeps Baird: 9) Enoe: 
Acad. Nat. Sci. Phila., 7, April, 1855, p. 335. 
Type locality—Humboldt Bay, Humboldt County, Cali- 
fornia. 
Synonyms—Thomomys bottae, part; Broad-headed Pocket 
Gopher. 
Range—Transition zone in the humid coast belt in the vicin- 
ity of Humboldt Bay (Mus. Vert. Zool.). 
