112 



CLAUDE W. MITCHELL 



NeiD races from D 



In a mass culture that had developed from the fourth individual 

 of the forty-second generation of D, mutation had occurred, 

 males had been produced, followed by resting eggs. One hatched 

 on the sixteenth, and from it pedigree series G was bred, consisting 

 of twenty generations; its history is found in table 10. 



Here again as in F, the mutation occurred in the second genera- 

 tion. This repetition, together with mass culture results, would 

 seem to indicate a tendency to mutate in the early generations. 



TABLE 10 



History of Series G 

 Interna. = intermediate 



' One individual died. 



