The Inheritance of Forms of Behavior 283 



and in course of time a male and female, chosen at random 

 from their first litter, were similarly trained. All the individ- 

 uals were trained in the same way and under as nearly the 

 same conditions as could be maintained, and accurate records 

 were kept of the behavior of each animal and of the number 

 of errors of choice which it made in series after series of tests. 

 What do these records indicate concerning the influence of ) 

 individually acquired forms of behavior upon the behavior/ 

 of the race ? 



I have records for four generations in the 200 line and for 

 three generations in the 400 line. 1 As the results are prac- 

 tically the same for each, I shall present the detailed records 

 for the former group alone. In Table 53 are to be found the 

 number of errors made in successive series of ten tests each 

 by the various individuals of the 200 line which were trained 

 in this experiment. The most careful examination fails to 

 reveal any indication of the inheritance of a tendency to avoid 

 the black box. No. 240, in fact, chose the black box more 

 frequently in the preference series than did No. 210, and he 

 required thirty more tests for the establishment of a perfect 

 habit than did No. 210. Apparently descent from individuals 

 which had thoroughly learned to avoid the black box gives 

 the dancer no advantage in the formation of a white-black 

 discrimination habit. There is absolutely no evidence of 

 the inheritance of this particular individually acquired form 

 of behavior in the dancer. 



1 This experiment was interrupted by the death of the animals of both 

 lines of descent. 



