56 Proceedings of the Biological Society of Washington. 
Scapanus latimanus grinnelli suixsp. nov.* 
Tijpe., adult cJ', skiu and skull, No. 17,785, Museum of Vertebrate 
Zoology, University of California, from Indei)endence (altitude, 3,900 
feet), Inyo County, California; collected May 8, 1912, by JI. A. Carr. 
General characters—H 'xzq small; slightly larger than S. 1. occuUus or 
S. 1. minusculus, smaller than S. 1. sericntus ; color dark; skull short 
and high, broad interorbitally and through mastoids; rostrum short aiid 
wide. 
Color. —Type, in worn and somewhat faded winter pelage: Upperparts 
between fuscous and fuscous-black; ventral j)arts slightly more grayish, 
stained on throat and chest with Dre.sden brown. 
Measurements.—Type, measured in the flesh: Total length, 150; 
tail vertebra', 2)1 ; hind foot, 21. Skull of type: Condylohasal length, 
32.8; greatest length, 33.0; palatilar length, 13.1 ; breadth across mas¬ 
toids, 17.0; interorbital constriction, 7.8; maxillary tooth row, 10 . 4 ; 
mandibular molar-premolar row, 10.0. 
Remarhs .—This subspecies is apparently the darkest form of the lati¬ 
manus gi’oup. It is known only from the type locality and only two 
specimens have been examined; the characters in these two, except for a 
supernumerary maxillary premolar in the topotype, are remarkably 
uniform. 
♦ Named for ])r. .toseph Grinnell in recognition of Ids valuable studies upon the 
I’acific coast fauna, and who has kindly granted me the privilege of describing this 
form from the collection of the Museum of Vertel)rate Zoology, University of California. 
