344. CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser. 
Family ERETHIZONTIDAE 
Erethizon epixanthum epixanthum Brandt 
Yellow-haired Porcupine 
Original description—‘Erethizon epixanthus Brandt, Mem. 
Acad Sit Retersburo, 1835,(p) 390" pisn Ta Ol: 
Type locahity—California (or Unalaska).” 
Synonym—Erethizon dorsatus epixanthus. 
Range—High Transition and Boreal zones along the Sierra 
Nevada, from Mount Shasta (Merriam, N. Amer. Fauna, 16, 
1899, p. 98) to the vicinity of Mount Whitney (Mus. Vert. 
Zool. ). 
Family APLODONTIIDAE 
Aplodontia californica (Peters) 
Sierra Mountain Beaver 
Original description—Haplodon leporinus var. californicus 
Peters, Monats. K. Akad. Wiss. Berlin, 1864, pp. 177-179. 
Type locality—The Sierra of California. 
Synonym—A plodontia major Merriam, Ann. New York 
Acad. Sci., 3, May, 1886, p. 316 (type from Sierra Nevada, 
in Placer County, California) ; Haplodontia rufa californica; 
California Sewellel; California Mountain Beaver. 
Range—High Transition and Boreal zones on the central 
Sierra Nevada, Mount Shasta, and the Trinity and Siskiyou 
mountains (Mus. Vert. Zool. ; Stephens, Calif. Mammals, 1906, 
p. 94). 
Aplodontia phaea Merriam 
Point Reyes Mountain Beaver 
Origmal description—Aplodontia phaea Merriam, Proc. 
Biol. Soc. Wash., 13, January 31, 1899, p. 20. 
Type locality—Point Reyes, Marin County, California. 
Synonyms—Haplodontia phaea; Dark Sewellel; ?Haplodon 
rufus. 
Range—Transition and Boreal zones in the humid north- 
west coast belt, south as far as Lagunitas, Marin County (Mus. 
Mer Zool): 
