MUBID^— ARVICOLIN^— EVOTOMYS RUTILU8. 



141 



TABI.E XXXVII.— Jlfea«iirem«n<« ofaixty-smen (oh<1 list of other) specimen) of Evotoxyb nuTiLUs/rom Alia, 

 Europe, and North America — Coutinued. 



Observations made just now regarding the identity of the measurements 

 of Lapland and Massachusetts skulls *may be here repeated respecting meas- 

 urements of Asiatic, European, and American skins: there are discrepancies, 

 but only those of individual variability. 



The distance from nose to eye averages half an inch; from nose lo ear, 

 about nine-tenths; the length of the head about an inch. The average 

 length of the body we cannot make out precisely, as all our specimens are 

 dried skins, and many of them stretched or otherwise distorted. Doubtless 

 the average derivable from the table, as the figures stand, is a little too high. 

 We doubt that any one of the specimens exceeded 3.75 in life, and think 

 that few touch this dimension, which we are inclined to fix as about the 

 normal maximum; the average is probably just about 3.33, while the normal 

 minimum of adults may be a trifle under 3.00. The tail-vertebrse run between 

 O.SO and 1.2.5, with an average of iiard upon 1.10; the pencil of hairs at the 

 end is the fullest and longest of any North American representative of the 

 subfamily, a Lemming hardly excepted. It is rarely under a third of an 

 inch, averages upward of four-tenths, and sometimes reaches the half-inch. 

 The tail to end of hairs averages clo.se upon \.hO. The palms are within an 

 inappreciable fraction of a third of an inch, while the soles correspondingly 

 bear upon 0.70, with two-thirds and ihree-fourths as apparently minima and 

 maxima. The ears run between barely over a third to little more than hall 

 an inch, averaging nearer the latter dimension. 



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