h the kinds now arranged as subspecies of
_Clethrionomys gapperi_. Although we are aware that Dalquest (_op.
cit._:101-102) did not find actual intergradation between _nivarius_
and _Clethrionomys occidentalis occidentalis_--a ten-mile gap separated
their ranges--we prefer to use the name combination _Clethrionomys
occidentalis nivarius_. In doing so we recognize that intergradation
ultimately may be found between the two species _C. occidentalis_ and
_C. gapperi_; in that event the name _gapperi_ will apply as the name
of the species because it has priority over _occidentalis_.

The following named kinds of _Clethrionomys_ are considered to be
subspecies of _Clethrionomys occidentalis_:

CLETHRIONOMYS OCCIDENTALS OCCIDENTALIS (Merriam).

1890. _Evotomys occidentalis_ Merriam, N. Amer. Fauna, 4:25,
October 8, type from Aberdeen, Chehalis County, Washington.

1894. _Evotomys pygmaeus_ Rhoads, Proc. Acad. Nat. Sci.
Philadelphia, p. 284, October 23, type from mouth of Nisqually
River, Pierce County, Washington.

1929. _Evotomys gapperi occidentalis_, Taylor and Shaw, Occas.
Papers Charles R. Conner Mus., Washington State College, 2:23.

1948. _Clethrionomys californicus occidentalis_, Dalquest,
Univ. Kansas Publ., Mus. Nat. Hist., 2:344, April 9.

CLETHRIONOMYS OCCIDENTALIS CALIFORNICUS (Merriam).

1890. _Evotomys californicus_ Merriam, N. Amer. Fauna, 4:26,
October 8, type from Eureka, Humboldt County, California.

CLETHRIONOMYS OCCIDENTALIS CAURINUS (Bailey).

1898. _Evotomys caurinus_ Bailey, Proc. Biol. Soc. Washington,
12:21, January 27, type from Lund, east shore of Malaspina
Inlet, British Columbia.

1935. _Clethrionomys gapperi caurinus_, Racey and Cowan, Rept.
British Columbia Prov. Mus. for 1935, p. H 25.

CLETHRIONOMYS OCCIDENTALIS MAZAMA (Merriam).

1897. _Evotomys mazama_ Merriam, Proc. Biol. Soc. Washington,
11:71, April 21, type from Crater Lake, 7000 ft., Mount Mazama,
Klamath County, Oregon.

1936. _Clethrionomys californicus mazama_, Bailey, N. Amer.
Fauna, 55:192, August 29.

CLETHRIONOMYS OCCIDENTALIS NIVARIUS (Bailey).

1897. _Evotomys nivarius_ Bailey, Proc. Biol. Soc. Washington,
11:136, May 13, type from northwest slope of Mount Ellinor,
4000 ft., Olympic Mts., Mason County