44 



HEREDITY IN RABBITS, RATS, AND MICE. 



Table 25. — Grade distribution of the Fi young produced by the cross of 

 dark I}utch with tan Dutch. 



Table 26. — Grade distribution of the Fi young produced by the cross of white 

 Dutch unth tan Dutch. 



Table 27. — Grade distribution of the Fi young from crosses of dark Dutch with 

 self and of white Dutch with self. 



