GENETIC TYPE AND THE ENDOCRINES 



561 



shepherd F x s, 251 <$ , 246 9 , 1776 $ and 1780 9 ; two basset- 

 hound-German shepherd F L ,s, 1811 S and 1812 $ ; one basset- 

 hound-English bulldog F 1? 740 $ ; two bassethound-English 

 bulldog' F 2 s, 1909 & and 1310 9; four bassethound-German 

 shepherd F,s, 1297 $ , 1298 <S , 1300 9 and 1304 9 . 



The reactions of the dogs of this group to the preliminary 

 training did not differ to any extent from those of the animals 

 of group A, and the formation of the conditioned salivary 

 reaction followed the same general course. As the experi- 

 ments continued, however, it became evident that these animals 

 were not of the extreme lethargic type, as are those of group 



Text-figure !»6 



A. The conditioned response did not weaken after a period 

 of training as it did in the dogs of group A, and there was 

 no complete inactivity nor refusal of food. During the inter- 

 vals between signals the animals might sit down and remain 

 quiet, but the conditioning- signal always aroused them to 

 action. 



A good example of a dog of this group is 251 $ , a basset- 

 hound-German shepherd F x (text-fig. 96). The training of 

 this animal was continued over a period of 5 years, during 

 which time conditioned salivary responses were formed to 



