POCKET GOPHERS—GRINNELL 347 
distribution in California, of this type of rodent. Now we come to 
deal with the observation that while our pocket gopher as a genus 
exists in every county of California, from below sea level to almost 
the highest altitudes, from the hottest to the coldest portions of the 
State, and from the driest to the wettest belts, yet the species rep- 
resented under all these varying conditions is not the same; the genus 
122 
7 : 
LAA 
yi 
| T. bottae bottae 14.7. jacinteus 
2.T_ b. minor 15. T. altivallis 
3.T b laticeps 16. T. neglectus 
4.T. b. leucodon 17, T. alpinus alpinus 
5.7 b navus 18. T. a awahnee 
6.7 b mewa 19. T. perpallidus perpaliidus 
7.1. b. diaboli 20. T. p. albatus 
8.T b angularis . T. p. mohavensis 
9.T. b pascalis . I p. amargosae 
(0. 7. b infrapallidus . I p. perpes 
1. T b pallescens 4. T. p. melanotis 
12.T. b. nigricans . T p canus 
13.1. b. puertae . 7. scapterus 
y . TI operarius 
. T. cabezonae 
29. T. quadratus quadratus 
30. T. Q fisheri 
31. T. monticola monticola 
32. T. m. premaxillaris 
. Tm. mazama 
SS ,* 
Serene PNR ST ANN 
f fr. h 
= 4 i 
5 el Ci 
DISTRIBUTION MAP ac 
MUSEUM OF VERTEBRATE ZOOLOGY 
UNIVERSITY OF CALIFORNIA 
SCALE 
25 
MILES 
Fic. 1.—Map showing the distribution of the species and subspecies of pocket gopher 
in California 
is broken up, as indicated on the accompanying map, into not less 
than 33 different races (species or subspecies), no two of them 
occupying precisely the same territory. And this fact signifies that 
the varying combinations of conditions resulting from the topo- 
graphic and climatic diversity in California have made their im- 
press upon the gopher substocks, which are more or less isolated 
