428 U. S. NATIONAL MUSEUM BULLETIN 205 



Castor canadensis baileyi Nelsonf * 



1927. Castor canadensis baileyi Nelson, Proc. Biol. Soc. Washington, vol. 40, 

 p. 125, Sept. 26, 1927. 



Type Locality. — Humboldt River, 4 miles above Winnemucca, Humboldt 

 County, Nev. Range. — Humboldt River drainage in Nevada (Hall, Mammals of 

 Nevada, p. 488, July 1, 1946) ; in southeastern Oregon, from headwaters of 

 Blitzen River north to Malheur Lake, and northward in Silvies River and Steens 

 Mountains drainage (V. Bailey, North Amer. Fauna No. 55 (June), p. 224, 

 Aug. 29, 1936). 



Castor canadensis taylori Davis* 



1939. Castor canadensis taylori Davis, The Recent mammals of Idaho, p. 273, 

 Apr. 5, 1939. 



Type Locality. — Big Wood River, near Bellevue, Blaine County, Idaho. 

 Range. — Snake River drainage basin in southern Idaho (Davis, loc. cit.) , north- 

 ern Nevada in streams tributary to Snake River drainage (Hall, Mammals of 

 Nevada, p. 488, July 1, 1946), and possibly in western Utah (Long., Journ. 

 Mamm, vol. 21, No. 2, p. 177, May 16, 1940) . 



Castor canadensis pacificus Rhoads* 



1898. Castor canadensis pacificus Rhoads, Trans. Amer. Philos. Soc., new ser., 

 vol. 19, p. 422, September 1898. (Regarded as valid by Taylor, Univ. 

 California Publ. Zool., vol. 12, No. 15, p. 442, Mar. 20, 1916, and by 

 Benson, Journ. Mamm., vol. 14, No. 4, pp. 323-324, Nov. 13, 1933; and as 

 identical with leucodontus by Dalquest, Univ. Kansas Publ. Mus. Nat. Hist., 

 vol. 2, p. 322, Apr. 9, 1948.) 

 Type Locality. — Lake Keechelus, Cascade Mountains, Kittitas County, Wash. 

 Altitude, about 3,000 feet. Range. — From Rogue River Valley northward 

 through Willamette Valley, and eastward along Columbia River and its tribu- 

 taries in northern Oregon (V. Bailey, North Amer. Fauna No. 55 (June), pp. 

 218-219, August 29, 1936) ; Washington (regarded as leucodontus by Dalquest, 

 Univ. Kansas Publ. Mus. Nat. Hist., vol. 2, p. 322, Apr. 9, 1948), except south- 

 west corner; northern Idaho (Rust, Journ. Mamm., vol. 27, No. 4, p. 320, Nov. 25, 

 1946) ; and an undetermined distance northward in southwestern British Co- 

 lumbia (Anderson, Nat. Mus. Canada Bull. 102 (1946), p. 133, Jan. 24, 1947). 



Castor canadensis idoneus Jewett and Hall* 



1940. Castor canadensis idoneus Jewett and Hall, Journ. Mamm., vol. 21, 

 No. 1, p. 87, Feb. 15, 1940. 



Type Locality. — Foley Creek, tributary to Nehalem River, Tillamook County, 

 Oreg. Range. — Probably humid coastal area in Oregon west of Willamette 

 drainage, but definitely known only from type locality and from Blaine, Tillamook 

 County; in Washington, lowlands near mouth of Columbia River and also Puget 

 Island (Dalquest, Univ. Kansas Publ. Mus. Nat. Hist., vol. 2, p. 322, Apr. 9, 1948) . 



Castor canadensis leucodontus Gray* 



1869. Castor canadensis leucodonta Gray, Ann. Mag. Nat. Hist., ser. 4, vol. 4, 



p. 293, October 1869. 

 1907. Castor canadensis leucodontus Osgood, Proc. Biol. Soc. Washington, 



vol. 20, p. 47, Apr. 18, 1907. 



