40 



CHARLES A. COBURN 



The results of tests of the group of first generation hybrids 

 of Series A from matlngs of tame females with wild males are 

 presented in table 25, and from matlngs of wild females with 

 tame males In table 26, while those of Series B are to be found 

 in tables 27 and 28, respectively. In the same order the results 

 from the second generation hybrids are given In tables 29, 



TABLE 26 



Summary of Results of First Generation Hybrids, Fi, of Series A, from Matings of Parefital 

 Generation, Wild Female liith Tame Male 



Average number tests, 

 Range of tests, 4-5 

 Average age in days: 

 First test, 35.84 

 Last test, 62.38 



50 Fia Males 

 and Females 



Average number tests, 

 Range of tests, 4-5 

 Average age in days: 

 First test, 3L53 

 Last test, 62.16 



23 Fia Males 



Average number tests, 

 Range of tests, 4-5 

 Average age in days: 

 First test, 34.44 

 Last test, 62.57 



27 Fia Females 



4.52 

 First test . 



Average 1 and 2. 



Average all 



Average 3, 4 and 



5 



Last test 



4.52 

 First test . 



Average 1 and 2. 



Average all 



Average 3, 4 and 



5 



Last test 



4.51 

 First test. 



Average 1 and 2 . . 



Average all 



Average 3, 4 and 



5 



Last test 



WILDNESS 



Distribution of mice 

 in grades: 



Av. 1 2 3 4 5 



4.0 



3.91 



3.36 



2.93 

 3.02 



4.08 



4.04 



3.48 



3.03 

 3.17 



3.92 

 3.79 

 3.27 



2.85 



2 



SAVAGENESS 



Distribution of mice 

 in grades: 



Av. 1 2 3 4 5 



4.0 



3.63 



2.96 



2.42 

 2.07 



3.65 

 3.34 

 2.81 



2.39 



2.25 



4.29 



3.87 



3.08 



2.45 

 1.92 



30, 31, and 32; and those from the third generation hybrids in 

 tables ?)d), 34, 35, and 36. 



The differences in the results of the tests of these mice are so 

 slight that no attempt will be made to discuss each table sepa- 

 rately. The essential points from all the tables have been 

 brought together and are presented in table 37. In the first 



