MAMMALS OF MINNESOTA. 37 
Incisors of the lower jaw, trifid;two anterior premolars very 
small, the third slender. 
Length to anus, 1.8; tail, 1.5;head, nearly 0.7; ear (measured 
from base of opening) 0.6; (from base behind), 0.45; tragus, 
0.3; nose to eye, 0.3; width of gape, 0.3; distance between nares, 
0.1; humeral part of arm, 0.9; radius, 1.5; thumb, 0.3; first 
finger, 1.4; second finger, 2.4; third finger, 2.0; fourth finger, 
1.9; expanse, over 8.0; thigh, 0.5; tibia, 0.75. 
Toes nearly equal, with short claws, slightly webbed, 
sparsely hairy on the back. 
