320 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser. 
west in northern California to Trinity and Salmon Mountains, 
east to Warner Mountains (Bailey, N. Amer. Fauna, 17, 1900, 
p. 50; Mus. Vert. Zool.). 
Microtus mordax bernardinus Merriam 
San Bernardino Meadow Mouse 
Original description—Microtus mordax bernardinus Mer- 
riam, Proc. Biol. Soc. Wash., 21, June 9, 1908, p. 145. 
Type locality—Dry Lake, 9000 feet altitude, San Bernar- 
dino Mountains, California. 
Range—High Transition and Boreal zones in the San Ber- 
nardino Mountains, San Bernardino County, California (Mer- 
riam, supra cit.; Mus. Vert. Zool.). 
Microtus mordax angusticeps Bailey 
Northwest Coast Meadow Mouse 
Original description—Microtus angusticeps Bailey, Proc. 
Biol. Soc. Wash., 12, April 30, 1898, p. 86. 
Type locality—Crescent City, Del Norte County, California. 
Synonym—Coast Vole, part. 
Range—Transition and Boreal zones in extreme northwest 
humid coast belt; south to Eureka, Humboldt County (Bailey, 
N. Amer. Fauna, 17, 1900, p. 52; Mus. Vert. Zool.). 
Microtus oregoni oregoni (Bachman) 
Oregon Meadow Mouse 
Original description—Arvicola oregoni Bachman, Journ. 
Acad. Nat. Sci. Phila., 8, 1839, pp. 60, 61. 
Type locahty—Astoria, Oregon. 
Synonym—Oregon Vole. 
Range—Transition and Boreal zones in extreme northwest 
humid coast belt, south to Dyerville, Humboldt County, and 
interiorly to Hoopa Valley (Bailey, N. Amer. Fauna, 17, 1900, 
pe 7 Miasy Vert. Zool): 
Microtus oregoni adocetus Merriam 
Yolla Bolly Meadow Mouse 
Original description—Microtus oregoni adocetus Merriam, 
Proc. Biol. Soc. Wash., 21, June 9, 1908, pp. 145, 146. 
