GENETIC TYPE AND THE ENDOCRINES 



601 



types. The measurement for the indices involved, first, the 

 greatest saggital length of the chest. This gives the largest 

 vertical diameter of the chest. The measurement is made 

 from the dorsum of the chest to a point on the ventral side 

 which gives the greatest measurement. The region varies to 

 some extent among the dogs, but it is as a rule around the 

 eighth rib. The second is the greatest transverse measure- 

 ment through the same area. By dividing the transverse 

 measurement by the sagittal measurement and multiplying 



Text-figure 105 



the quotient by 100, an index is obtained which separates 

 the dogs into round bodied and thin bodied types. As a rule, 

 the round chested dogs are also thick in the abdominal 

 region, and the thin chested dogs are thin in this region. 

 Chest indices of three animals of each group are shown in 

 text-figure 105, and photographs of each type appear in 

 plates 100 (figs. 1, 2, 4) and 101 (figs. 2, 3, 4). The bodily 

 indices of all animals trained are shown in text-figure 106, with 

 the round bodied dogs at the right and the thin bodied animals 

 at the left. 



