Appendix 1 -- THE LOCALITY AND RANGE OF THE SEVEN RACES 
OF THE MOUNTAIN BEAVER 
Brown mountain beaver, Aplodontia rufa rufa (Rafinesque) 
Type Locality. Neighborhood of the Columbia River, Oreg. 
Specimens from Marmot, west slope of Mount Hood, Clackamas 
County, regarded as typical by Taylor (1918). 
Range. From Chilliwack-Sumas region on western side of Cascade 
Mountains in southwestern British Columbia southward through 
western Washington, between Puget Sound and Cascade Mountains, 
to Columbia River; marginal localities are Bellingham, Forks of 
Skykomis River, north bend and mouth of Kalama River. 
Mount Rainier mountain beaver, Aplodontia rufa rainieri (Merriam) 
Type Locality. Paradise Creek, south side of Mount Rainier, 
Pierce County, Wash, Altitude 5,200 feet, 
Range. Cascade Mountains in southwestern British Columbia, from 
Skagit on western slope near international boundary north to Hope}; 
only two records from drier eastern slope of Cascades -- east side 
of summit of Hope-Princeton Trail at 5,600 feet, and Stirling Creek 
near Headley in middle Similkmeen Valley at 1,700 feet (Anderson, 
loc. cit.); southward through higher Cascade Mountains of Washington 
(Dalquest, loc. cit.) and Oregon to Siskiyou and Trinity Mountain 
regions of northwestern California, and thence southwest as far as 
Rio Dell, Eel River, Humboldt County, regarded as rufa by Grinnell 
(1933). 
Pacific mountain beaver, Aplodontia rufa pacifica (Merriam) 
Type Locality. Newport, mouth of Yaquina Bay, Lincoln County, Oreg. 
Range. Coast region of Oregon from Columbia River (Astoria) 
southward to near Smith River, Del Norte County, Calif. Finley (1941). 
Humboldt Bay mountain beaver, Aplodontia rufa humboldtiana (Taylor) 
Type Locality. Carlotta, Humboldt County, Calif. 
Range. Extreme northern humid coast belt, from Requa, Del Norte 
County, south to vicinity of Carlotta, Humboldt County, and in- 
teriorly to vicinity of Weitzpek, Humboldt County; vertical range, 
below 1,000 feet; zonal range, Canadian and Transition, Grinnell 
(1933). 
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