308 



CHARLES R. STOCKARD AND A. L. JOHXSOX 



The snout index for the nine F t hybrid skulls is low, over- 

 lapping and extending only a little above the bassethound 

 range. The thirty-seven F 2 skulls range in snout index from 

 the bassethound low level of 58 up to almost 120, or, in 

 other words, from long, narrow skulls to those in which the 

 width of the jaw is greater than its length. However, this 

 maximum for the F 2 falls far short of the pure bulldog 

 proportion with a length of only two-thirds to one-half as 



SNOUT INDEX 



D 



E F 



Text-figure 66. Bassethound-English bulldog cross. Each vertical line repre- 

 sents an index based on exact measurements of the skull, and the series includes 

 those used in text-figure 65 as well as a number of additional skulls. A, basset- 

 hound; B, English bulldog; C, Fjj D, F 2 ; E, backcross of F t with bassethound; 

 F, backcross of F t with English bulldog. 



great as the width for the upper jaw. Almost half the F 2 

 skulls again fall for this index within the Fj range. The 

 trend of F 2 indices is considerably closer to that of the basset- 

 hound than to that of the bulldog. 



The two skulls measured for this index from backcross 

 bassethound hybrids have the exact values of those for the 

 pure bassethound. In contrast, the two backcross bulldog 

 hybrids have short snouts with high indices of 115 and 133. 

 The higher of these is only 6 units below the lowest index 



