THE GEOGRAPHICAL DISTRIBUTION OF MAMMALS 



163 



dea), three genera of skunks, pumas, several species of lynx 

 and some bears (Ursus) represent the Garni vora, though one 

 species each of raccoon, skunk, badger, puma and lynx range 



Fig. 75. — Kangaroo-Rat (Dipodoniijs philippii). — By permission 

 of the N.Y. Zoolog. Soc. 



into the Boreal. The American types of shrews (Blarina) 

 and moles (Scalops and Scapanus) are characteristic of the 

 Sonoran, though partially shared with the Boreal. A great 



Fig. 76. — Thirtecn-lined Spermophile {S/Hrmupliilu.-s trcdecimUnealii.-i). 

 — B>- permission of tlie X.V. Zoolog. Soc. 



many peculiar rodents inhabit the Sonoran ; cotton-rats (Sig- 

 modon), pocket-gophers {Geomys, etc.), several genera of the 

 beautiful little kangaroo-rats (Dipodomys, etc.) ; while the 



