270 



CHARLES R. STOCKARD AND A. L. JOHXSOX 



The lower chart, which represents the upper facial index, 

 indicates a close parallel between this index and the snout 

 index. 



The indices of the various skull features and the relative 

 proportions between certain linear dimensions in the skulls 

 of the French bulldog and the dachshund, along with the 



SNOUT INDEX 



Text-figure 62. Dachshund-French bulldog cross. Each vertical line represents 

 an index based on exact measurements of the skull. The series of skulls for 

 these two charts is the same as used for text-figure 61. A, dachshund; B, French 

 bulldog; C, F I; D, F 2 ; E, F, X F 2 . 



averages for these characters in the F l and F2 hybrids, are 

 indicated clearly by the curves in text-figure 63. The curve 

 of values for the dachshund is drawn in continuous line, for 

 the French bulldog in a dash-dot line, for the F x in a dashed 

 line and for the F 2 in a dotted line. The magnitudes of the 

 indices and the relative linear proportions are indicated by 



