TABLE 3. Measurements (in mm) of Microtus pennsylvancus first lower molars from Golliher B. N = number of specimens, s = standard deviation, O.R. = observed range.
N
Mean
s
O.R.
Length m1
47
2.97
0.19
2.55-3.51
Width m1
48
1.14
0.07
0.96-1.36