276 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



It results, then, from the two lines of numbers at the bottom of Table A 

 that, in spite of the somewhat inaccurate values of this coefficient, in from 

 two tiiirds to four fifths of the comparisons, that dimension in any pair 

 ■which is the more variable among individuals of the same race is likewise 

 the dimension which is the more diverse in the various races. Inciden- 

 tally it may be noted, too, that the measurements of the face have, in 

 general, the largest coefficients, and thus the high value for personal 

 identification which has long been accorded to photographs of the face 

 alone is justified. 



TABLE C. 



C. V. OF Various Dimensions of Skulls of a Genus (Lepus) of Rodents. 

 (Based on Cones and Allen, 77, pp. 222-226.) 



Total length 



Greatest width 



Distance between orbits 



Nasal bones, length 



Nasal bones, width behind 



Nasal bones, width before 



Upper incisors to molars 



Upper incisors to hinder margin of palate 



Upper incisors, height 



Upper incisors, width 



Length of upper molars 



Width between upper molars 



Lower jaw length 



Lower jaw height 







q; O 



Cases of Agreement 



Cases of Disagreement 



0.121 



O.O'.iSu 



0.0825 



0.122 



0.150 



0.178 



0.125 



0.0799 



0.146 



146 



0.0958 



0.14 



0.124 



0.122 



■« 

 p. 



3 

 P. 



1^ 



in 



0.0438 



0272 



0.0691 



0.0732 



0.0084 



0.0700 



0.0527 



0.0477 



0.0364 



0.0502 



0.0459 



0.0348 



0.0491 



0.0329 



55 



30 



0.0178 

 0.0239 

 0.0475 

 0.0348 

 0.0327 

 0.0405 

 0.0280 

 0.0238 

 0.0568 

 0.0434 

 0.0393 

 0.0452 

 0.0240 

 0.0174 



Q. 

 CO 



s 



59 



0.0308 

 0.0255 

 0.0583 

 0.0.540 

 0.0505 

 0.0582 

 0.0403 

 0.0357 

 0.0466 

 0.0408 

 0.0426 

 0.0400 

 0.0365 

 0.0251 



60 



31 



Table C shows for a genus of rodents what Table A shows for races of 

 mankind. The first column is computed from the means of twelve species 

 and subspecies of the genus Lepus. This gives, therefore, the relative 

 value of these dimensions as specific and subspecific differences. The 



