28 



EXPERIMENTS WITH DROSOPHILA AMPELOPHILA. 



TABLE 30. Percentage of abnormal offspring in 13 matings 

 of N$ (ex. N$ X A?) X A? (ex. Ns X A$). 



FEMALES. 



TABLE 31. Percentage of abnormal offspring in 9 matings of 

 Ns (ex. A$ X A$) X A$ (ex. At X A$). 



