46 



HEREDITY IN RABBITS, RATS, AND MICE. 



Table 31. — Grade distribution of young sired by English male 2711, grade 4, generation 1, 

 ancestor of all English in the selection series. 

 A. Mother English. 



B. Mother Self. 



Table 32. — Grade distribution of young sired by English male 6086, grade 4i, generation 1 i- 



A. Mother English. 



