The grey foxes (_Urocyon_), Coyote (_Canis latrans_), large Timber Wolf (_Canis occidentalis_), the Caxomistle (_Bassariscus_), the Coati (_Nasua_), Raccoon (_Procyon_), Badger (_Taxidea_), three genera of skunks, pumas, several species of lynx and some bears (_Ursus_) represent the Carnivora, though one species each of raccoon, skunk, badger, puma and lynx range 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 many peculiar rodents inhabit the Sonoran; cotton-rats (_Sigmodon_), pocket-gophers (_Geomys_, etc.), several genera of the beautiful little kangaroo-rats (_Dipodomys_, etc.); while the prairie-dogs (_Cynomys_), the white-footed mice (_Sitomys_), wood-rats (_Neotoma_) and one genus of pocket-gophers (_Thomomys_) are chiefly Sonoran, but have Boreal representatives. The flying squirrels (_Sciuropterus_), true squirrels (_Sciurus_), ground-squirrels (_Spermophilus_), rabbits (_Lepus_), wolves (_Canis_) and otters (_Lutra_) have a very wide range through both the Boreal and Sonoran, but have many more species in the latter region. [Illustration: FIG. 77.—Grey Squirrel (_Sciurus carolinensis_).—By permission of the N.Y. Zoölog. Soc.] The Sonoran region may be divided into the upper and lower Sonoran zones, which are demarcated by temperature and are of transcontinental extent. Each of these zones may, in turn, be subdivided into _arid_ and _humid_ provinces, but our purpose does not necessitate entering into such refinements. [Illustration: FIG. 78.—Grey Fox (_Urocyon virginianus_).—By permission of the N.Y. Zoölog. Soc.] [Illustration: FIG. 79.—Prairie Wolf or Coyote (_Canis latrans_).—By permission of the N.Y. Zoölog. Soc.] [Illustration: FIG. 80.—Raccoon (_Procyon lotor_).—By permission of the N.Y. Zoölog. Soc.] [Illustration: FIG. 81.—Virginia Deer (_Odocoileus virginianus_).—By permission of the N.Y. Zoölog. Soc.] [Illustration: FIG. 82.—Skunk (_Mephitis mephitis_).—By permission of the N.Y. Zoölog. Soc.] [Illustration: FIG. 83.—Mule Deer (_Odocoileus hemionus_).—By permission of the N.Y. Zoölog. Soc.] [Illustration: FIG. 84.—Badger (_Taxidea americana_).—By permission of the N.Y. Zoölog. Soc.] [Illustration: FIG. 85.—Puma or Mountain Lion (_Felis concolor_).—By permission of the N.Y. Zoölog. Soc.] [Illustration: FIG. 86.—Lynx (_Lynx rufus_).—By permission of the N.Y. Zoölog. Soc.] [Illustration: FIG. 87.—Prairie-Dog (_Cynomys ludovicianus_).—By permission of the N.Y. Zoölog. Soc.]