44 



CHARLES A. COBURN 



wildness in Series A, which show a decrease in wildness in the 

 successive generations, and the averages of the third, fourth 

 and fifth tests for savageness in Series B, which indicate a sHght 

 increase in savageness in each succeeding generation. 



The grades in wildness and savageness attained by the 

 females of Series B are generally in excess of those attained by 



TABLE 30 



Summary of Results of Second Generation Hybrids, F2, of Series A ,from Matings of Parental 

 Generation, Wild Female with Tame Male 



Average number tests, 

 Range of tests, 3-5 

 Average age in days: 

 First test, 38.07 

 Last test, 104.2 



39 Faa Males 

 and Females 



Average number tests, 

 Range of tests, 4-5 

 Average age in days: 

 First test, 3L53 

 Last test, 97.0 



13 Foa 

 Males 



Average number tests. 

 Range of tests, 3-5 

 Average age in days: 

 First test, 41.34 

 Last test, 100.68 



26F2a 

 Females 



4.10_ , 



First test . 



Average 1 and 2. . 



Average all 



Average 3, 4 and 



5 



Last test 



4.30 _ 



First test . 



Average 1 and 2. . 



Average all 



Average 3, 4 and 



5 



Last test 



First test 



Average 1 and 2. 



Average all 



Average 3, 4 and 



5 



Last test 



DJs 



tribution of mice 

 in grades: 



Av. 



3.96 



3.84 



3.1 



2.4 

 2.43 



4.0 



3.8 



2.92 



2.16 

 2.46 



3.96 

 3.86 

 3.2 



2.53 

 2.42 



12 3 4 5 



SAVAGENESS 



Distribution of mice 

 in grades: 



Av. 



3.97 



3.52 



2.76 



2.04 

 0.86 



4.23 



3.76 



2.83 



2.03 

 1.25 



3.84 



3.4 



2.73 



2.05 

 0.72 



the males. In Series A, however, the males graded higher in 

 wildness in the first generation and higher in savageness in the 

 third generation. In the case of the averages for savageness 

 of Fi, Series A, tame female by wild male, and of F2, Series B, 

 tame female by wild male, and also in the case of the averages 

 for wildness of F3, Series B, wild female by tame male, the males 



