216 



CHABLES R. STOCKAED AXD A. L. JOHNSON" 



matic width the English bulldog is far above the other two, 

 but this is due almost entirely to the general differences in 

 skull size, and the type value of this character is about equal 

 in all three skulls. 



The relation of the total anteroposterior dimensions of the 

 maxillary premolar teeth to the maxillary premolar region 

 is highest in the Boston terrier, next in the French bulldog 

 and low T est in the English bulldog. The same relation holds 

 for the total mandibular premolar anteroposterior dimensions 

 to mandibular premolar region. This means, of course, that 



IBOSTON TERRIER 



t ENGLISH BULLDOG 

 TRENCH BULLDOG 

 BOSTON TERRIER 



a '- 



Text-figure 53. Comparison of skull measurements and indices of the Boston 

 terrier, French bulldog and English bulldog. The values indicated are based 

 on averages of actual measurements of nine English bulldog, four French bulldog 

 and five Boston terrier skulls. 



