TABLE 21 



Number of eggs laid by the offspring of the crosses between the low-producing truncates 

 and the high-producing Woods Hole stock. These are the same females given in 

 table 18 



(A) A9X Acf (B) B 9X B d^ 



Average per day 21.12 



Average per day 24.4 

 * Escaped 



TABLE 22 



Showing the total output of eggs of the Woods Hole stock and their hybrid children 



WH9 X WHcf 



tohen crossed to the truncate stock 

 A9 X Acf 



B9 X Bcf 



Average number of eggs Average number of eggs 



laid per day 25.63. laid per day 25.09. 



i — 



Average number of 

 eggs laid per day 12.02. 



Average number of 

 eggs laid per day, not 

 considering number 15, 

 13.61. 



205 



THE JOURNAL OF EXPERIMENTAL ZOOLOGY, VOL. 17, NO. 



