626 W. T. JAMES 



Fj. Both these animals were of the round bodied type. In 

 the food taking experiments, animal 248 9 became completely 

 inhibited after 50 signals had been applied with food, and 

 a conditioned salivary reaction was never formed. The second 

 animal, 336 9 , developed a weak response, lasting for a short 

 time only, and became completely inhibited after 100 signals 

 had been applied with food (pi. 100, fig. 3). It was evident 

 that in the salivary situation both dogs fell into the inactive 

 group. 



These two animals were also trained with the motor re- 

 sponse. No. 248 9 failed to develop a conditioned avoiding 

 reaction. Animal 336 9 formed a conditioned avoiding move- 

 ment, but, as shown in text-figure 104, the percentage of 

 responses was extremely low. This places the dogs in the 

 round bodied group for the motor reaction as well as the 

 salivary reaction. It is reasonable to assume, on the basis 

 of the behavior of these two dogs, that the dachshund is like 

 the bassethound in general behavior. 



Boston terrier. The next type to be considered from this 

 point of view was the Boston terrier. This breed has the 

 same general physical abnormalities, including the undershot 

 jaw, screw tail, round head, and very round body, as the 

 English bulldog. The bodily index of the dog trained, 434 9 , 

 was 92 (pi. 105, fig. 4). 



This Boston terrier was first trained with the food taking- 

 situation. In addition to the clicker signals, visual, tactile 

 and other auditory stimuli were employed, and the animal 

 developed good salivary responses to all (text-fig. 100). She 

 appeared to be as excitable in these experiments as the 

 English bulldog, but the conditioned salivary reaction was 

 smaller. This is due to the fact that the Boston terrier is 

 smaller in size and consequently has a smaller food intake. 

 The total amount of food consumed by this dog in one ex- 

 perimental period is only a little more than that consumed 

 by the English bulldog for two signals. Thus the value of 

 the conditioned salivary reaction alone is misleading. The 

 English bulldog has a larger mouth, as well as a larger 



