11 
Cran. 
Skel. 
1356. 
Cran. 
967, 
968, 
969, 
970, 
Skel. 
Cran. 
Skel. 
597, 
1328. 
1406. 
Cran. 
608, 
1040, 
1404. 
Skel. 
Cran. 
228, 
229, 
230, 
1194. 
Skel. 
Cran. 
Skel. 
681, 
1137. 
Cran. 
990. 
Skel. 
Cran. 
719, 
827. 
Skel. 
Cran. 
Skel. 
1310. 
Cran. 
1001, 
1002. 
Skel. 
Cran. 
Skel. 
220, 
1081, 
221, 
794, 
822. 
1082. 
Cran. Skel. 
975. 1357. 
Neotoma cinerea (Ord.), Baird. Rocky Mountain Rat. 
Sigraodon hispidus (Say), Ord. Cotton Rat. 
Hesperomys ( Vesperimus ) leucopus (Raf.). White-footed 
Mouse. 
Sub-Family Arvicolince: Field Mice. 
Arvicola (Myonomes) riparius, Ord. Field Mouse. 
Fiber zibethicus (Linn.), Cuvier. Musk Rat. 
Family Saccomyim : Pouched Mice. 
Sub-Family Dipodomyince. 
Dipodomys phillipsi ordi (Woodh.), Cs. Kangaroo Rat. 
Cricetodipus flavus, Baird. Western Mouse. 
Family Geomyid.®: Gophers. 
Geomys bursarius, Shaw. Pouched Gopher. 
Thomomys talpoides (Rich.), Baird. Fort Union Gopher. 
Thomomys talpoides umbrinus (Rich.), Cs. Black-faced 
Gopher. 
Family Castorid,® : Beavers. 
Castor canadensis, Kuhl. American Beaver. 
Family Sciurid m : Squirrels , etc. 
Sub-Family Sciurince : Typical Squirrels. 
Sciurus aberti, Woodh. Tuft-eared Squirrel. 
