76 Coincidence. 



Table 9. — Coincidence in Drosophila virilis (selected data from table 8.) 



Since the loci of crossveinless, vermilion, and vesiculated are so 

 close together, data from experiments involving these characters 

 have been lumped together in some cases (e. g., the second case in 

 table 9), in order to secure larger numbers for the calculations. 

 This introduces a shght error, but one that may safely be ignored for 

 present purposes. 



