Clethrionomys californiens (Merriam, 1890) . N. Am. Fauna, 4:26.

TYPE LOCALITY: USA, California, Humboldt Co., Eureka .

DISTRIBUTION: Pacific-coast coniferous forest from the Columbia River south through W Oregon to NW California, USA.

SYNONYMS: mazama, obscurus .

COMMENTS: The name occidentalis was formerly applied to this species (e.g., Hall and Cockrum, 1953), but populations north of the Columbia River, which include occidentalis and caurinus, have been reassigned to C. gapperi (Cowan and Guiguet, 1965; Johnson and Ostenson, 1959).