52 SELECTION IN CLADOCERA ON THE BASIS OF 



TABLE 16. Selection data summarized by two-month periods for Line 711 minus. 



TABLE 17. Selection summary for Line 711. 



Time period. 



Apr. 1912- 

 July 31, 1912 



Aug. 1, 1912- 

 July 31, 1 



Strain. 



Plus 



Minus . . 



jPlUB.... 



1 Minus . . 



6-17 



6-18 



18-50 



18-61 



4-1 



488.7 

 688. 

 241.2 

 286.9 



327.7 

 SIB. 1 

 163.3 

 193.8 



30.7 



30.4 



7.2 



9.6 



-45.7 



43.1 



3.84 



TABLE 18. Same-day broods. Summary of data for Line 711. 



Time period. 



Mar. 26, 1912-July 31 

 1912... 



U U13.'. 



1, 1912-July 31 



Strain. 



Plus.. 



Minus 

 Plus.. 



Minus 



4.0 

 f.7 



8.3 



Hi 



477 

 SS3 

 128 



900 

 80 

 398 



348 



680 

 638 

 224 



l| 



ii 



