52 SELECTION IN CLADOCERA ON THE BASIS OF 



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



Time period. 



Apr. 1912- 

 July 31, 1912 



Aug. 1, 1912- 

 July 31, 1913 



Strain. 



TABLE 17. Selection summary for Line 711. 



f Plus.... 

 1 Minus . . 

 fPlus.... 

 t Minus . . 



6-17 



6-18 



18-50 



18-61 



12 



4.3 



7.1 

 5.3 



II 



I s 



I 1 



.S g> 



52 



235 



190 



4 



s^ 



l-s 



18 





322 

 376 

 129 





727 

 760 

 397 

 419 



8.8 



488.7 



241.2 



327.7 

 3/5. / 

 163.3 

 193.8 



30.7 



30.4 



7.2 



9.5 



-59.5 



-45.7 



43.1 



11.9 



3 



2 



t.31 



3.54 



TABLE 18. Same-day broods. Summary of data for Line 7 1 1 . 



