80 



A. FRANKLIN SHULL 



Fig. 2 Diagram showing results of all experiments described in text (see 

 also fig. 1). M = percentage of male-producers in parthenogenetic line. V 

 = percentage of viable fertilized eggs. VP = percentage viability in family 

 of fertilized eggs from which parthenogenetic line was derived, a = standard, 

 deviation of duration of egg stage. 



reared from the fertilized eggs in C X D and D X C, and these 

 lines were in turn inbred and reciprocally crossed, the following 

 result appeared: the two lots of inbred eggs were approximately 



