624 W. T. JAMES 



Bassethound-German shepherd F^ by English bulldog- 

 bassethound FI. Thus far we have dealt only with the first 

 and second generation hybrids obtained by breeding the 

 physical types A (bassethound) and B (German shepherd) 

 together, and the mixed English bulldog and bassethound. 

 A bassethound-shepherd Fj and a bulldog-bassethound F,, 

 which had been employed in the above experiments, were 

 crossed to determine the variability in behavioral patterns 

 when all parent types are involved. Three dogs, theoretically 

 one half bassethound, one quarter German shepherd, and 

 one quarter English bulldog, resulted from this mating. One 

 offspring, 1502 9 , was short legged and round bodied with 

 a chest index of 78. The other two, 1504 9 and 1503 9 , were 

 long legged and thin bodied with chest indices of 58 and 63, 

 respectively. Animal 1502 9 was classed with the inactive 

 group in behavior, but since she did not become completely 

 passive under laboratory conditions, was considered A-plus 

 rather than A. Animal 15049 was much more excitable and 

 developed vigorous conditioned salivary reactions and a stable 

 negative. The general course of its behavior was similar 

 to that of the B-minus group. This dog was also trained 

 with the motor reflex, and in this situation her behavior was 

 precisely like that of the bassethound. She was unable to 

 form a continued avoiding reaction, although more than 400 

 signals were applied and reinforced. She was never disturbed 

 by the shock. This behavior was unexpected and could not 

 have been anticipated on the basis of her performance in 

 the salivary situation. The third dog of the group, 1503 9 , 

 was different from the other two. This animal was unable 

 to make even the initial adjustment to the laboratory situa- 

 tion or the experimenter. She became hysterical and frightened 

 by every change in the environment, and when anyone entered 

 the kennel would attempt to jump the fence. It is possible 

 that in this animal the excitable nature of the shepherd and 

 the bulldog are dominant over the lethargic nature of the 

 bassethound, although theoretically the bassethound is domi- 

 nant in inheritance. 



