Dwarf Shrew 
265 
Skull rather large, with broad palate ; brain-case long as well 
as broad ; unicuspidate teeth broad ; third unicuspid decidedly- 
smaller than fourth. This species has smaller ears, broader palate, 
and broader unicuspidate teeth than 5. dobsoni. The molariform 
teeth are also larger. 
Distribution. — Mountains of British Columbia, Washington, 
Montana, Wyoming, Utah, and Colorado, and south in the high 
Sierras to Mount Whitney, California. Preble took it in British 
America as far north as Fort Simpson, Lat. 62°, In Colorado it is 
found through much of the mountains, and has been reported from 
Long's Peak, Boulder, Nederland, Fort Garland, Cochetopa Pass, 
Silverton, Black Hawk, Crested Butte, Salida, Poncha Pass; 
several points in the mountains near Colorado Springs, and Marvine 
Lodge (Rio Blanco County). It has been taken as high as 11,500 
feet, and down to 7,000 feet. 
FIG. 80. DUSKY SHREW, Sorex ohscuYus 
Photographed from a dead specimen by E. R. Warren 
Sorex tenellus nanus. Dwarf Shrew 
Sorex tenelhis nanus Merriam, N . A. Fauna, No. 10, p. 81 (1895). 
Type locality. — Estes Park, Larimer County, Colorado (Coll. by 
E. A. Preble, Aug. 3, 1895). 
Measurements. — Totallength, 4.12 ;tail vert., 1.65 ;hind foot, 0.43. 
Description. — Upper parts sepia brown, darkest on back; under 
parts and feet grayish ash ; tail bicolor, upper side concolor with back, 
under side whitish. Skull small, slender, and very flat, the brain- 
