32 



PIEBALD RATS AND SELECTION. 



TABLES. 



Table 1.— Classification of the first generation of offspring in the plus selection series. At 

 the head of each column is indicated the grade of the individuals recorded in that column. 

 The figures in the body of the table indicate the numbers of offspring of the several grades 

 indicated. 



Table 2. — Classification of offspring in generation 2, plus selection series. 



