I 
Ubc /IDammals of /llbouut /IDasama, ©rcGon. 
C. FIART MERRIAM. 
The mammal fauna of Mount ]\Iazama is one of more than or- 
dinary interest. In addition to the fact that no list of the mammals 
of any part of the Cascade Range has ever been published, and that 
the number of species inhabiting the region is rather large, it is of 
geographic interest to note that several peculiar west coast types 
occur here in company with species which do not occur farther 
west; and that certain northern and southern species find on this 
mountain, so far as now known, the extreme limits of their ranges. 
Among the west coast types referred to are the Sewellel (Aplodon- 
tia\ Gibbs' Mole (Neurotrichus), the large Water Shrews of the 
subgenus Atophyrax^ and Voles of the subgenus Chilotus. Besides 
these, a number of characteristic west coast species — as the Colum- 
bia Deer {Cariacus columbianus), Oregon Bassarisk (Bassariscus 
raptor)^ the large gray tree Squirrel (Sciurus fossor)^ Allen's Chip- 
munk (Eutamias senex)^ and round-tailed Woodrat (Neotoma fus- 
cipes) — also inhabit Mount Mazama or the Fort Klamath plain, 
where they meet or slightly overlap the ranges of species character- 
istic of the mountains and plateaus farther east. Among the latter 
are the Rocky Mountain Black-tail Deer {Cariacus heniionus\ 
Sierra Marmot {Arctomys Eaviventer)^ Pika, or Little Chief Hare 
{Ochotona schisticeps)^ Golden-mantled Ground Squirrel (Spermo- 
philus chrysodeirus)^ small Chipmunk {Eutamias awoenus)^ 
Belding's Ground Squirrel {Spermophilus beldingi\ the sage plains 
Jackrabbit {Lepus catnpestris)^ and the Cottontail {Lepus nuttalli). 
A Boreal genus of Voles, Phenacomys^ not previously known from 
the Cascade Range south of British Columbia, a Boreal subgenus of 
Voles {Arvicola proper*), not previously known from Oregon, the 
Alpine Flying Squirrel, and several undescribed species were found 
inhabiting the higher slopes about Crater Lake. Here, also, in 
* The animal here referred to is the large Mountain Water Rat, Microius {Arvicola) arvicoloides. 
