GENETIC TYPE AND THE ENDOCEINES 



173 



range from 98 mm down to only 10 mm, the longest being 

 to the shortest as 9.8:1. Some breeds of dogs have long 

 noses, while in other breeds the nose is extremely short. 

 The series of measurements for nasal lengths accords very 

 closely with the series for the two other facial features 

 represented in text-figures 20 and 21. 



7o — 



to 



7o — 



to 



So 



& — 



3o - 

 20 - 

 /O- 



Text-figure 22. Sequence F. Nasal length. Same skull sequence as text- 

 figure 20. 



The lengths of mandibles in the same sequence of skulls are 

 represented in text-figure 23. The method used in measuring 

 mandibular length is shown in plate 35 (fig. 4, H-I) ; that 

 is, the mandible was placed in a vertical position with the 

 condyles resting on a flat surface, and the distance from this 



