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UNIVERSITY OF CALIFORNIA PUBLICATIONS 
IN 
ZOOLOGY 
Vol. 17, No. 14, pp. 423-430 April 25, 1918 
SIX NEW MAMMALS FROM THE MOHAVE 
DESERT AND INYO REGIONS OF 
CALIFORNIA 
BY 
JOSEPH GRINNELL 
(Contribution from the Museum of Vertebrate Zoology of the University of California) 
Field work carried on under the auspices of the California Museum 
of Vertebrate Zoology during 1917 in southeastern California brought 
to light many new facts in regard to the general distribution and 
speciation of the endemic vertebrate animals. Some of these facts, as 
concerning certain of the mammals, are set forth in the present paper. 
Scapanus latimanus monoensis, new subspecies 
Mono Mole 
Type—Female adult, skull (with teeth worn) and skin (in summer 
pelage) ; no. 25834, Mus. Vert. Zool.; Taylor Ranch, two miles south of 
Benton Station, Mono County, California; August 29, 1917; collected 
by H. G. White; original no. 1376. 
Diagnosis—A small-sized member of the Scapanus latimanus group 
of moles (see Jackson, 1915, pp. 64-75) ; similar to its near neighbor 
on the south, S. 1. grinnelli, but color mouse gray (of Ridgway, 1912, 
pl. 51) instead of fuseous-black, and size slightly less. Resembles 
S. Ll. dilatus in color but size very much less. 
Measurements.—Average of eight adults (the first three features as 
taken by the collector in the field) : total length, 150 millimeters; tail 
vertebrae, 33; hind foot, 20.6; greatest length of skull, 32.9; mastoid 
breadth, 16.2; interorbital breadth, 7.5. Extremes are shown in the 
accompanying table (1). 
Distribution—Known only from two localities, both in Mono 
County, California: vicinity of Williams Butte. near Mono Lake; and 
vicinity of Benton. The total available material representing this form 
is listed in the accompanying table. 
