52 



PIEBALD RATS AND SELECTION. 



Table 51.— Fi offspring of the original "mutant" male, 4763, +5i, mated with females of the 

 plus series, and with the "mutant" female, 51SS,+Bl. 



Table 52. — /i"! offspring of the original mutant male, 4763, -\-5i, mated mth females 



of the minus series. 



