324 



riddle: control of sex ratio 



TABLE 3 

 Fertility in "Family" and "Generic" Crosses 



FAMILY CROSS 



GENERIC CROSS 





Common X 



ring 



Ring X turtle 



Al 



6- 9-15 



infert. 



Dl 



4-27-07 



infert. 



A2 



6-11-15 



infert. 



(?T>2 



4-29-07 



hatch. 



cfBl 



6-23-15 



hatch. 



cfEl 



6- 2-07 



hatch. 



o"B2 



6-25-15 



hatch. 



c?E2 



6- 4-07 



hatch. 



CI 



7- 1-15 



infert. 



' 9F1 



7-14-07 



hatch. 



C2 



7- 3-15 



infert. 



9F2 



7-16-07 



hatch. 



Dl 



7-28-15 



infert. 



cfGl 



8-25-07 



hatch. 



D2 



7-30-15 

 8-13-15 



infert. 

 infert. 



9G2 



8-27-07 



hatch. 



El 



rMl 



2-12-08 



hatch. 



E2 



8-15-15 



infert. 



9A2 



2-14-0S 



hatch. 



Fl 



9-10-15 



infert. 



cfBl 



3-18-08 



hatch. 



cTF2 



9-12-15 



hatch. 



c?B2 



3-20-08 



hatch. 



Gl 



9-26-15 



infert. 



9 CI 



4-17-08 



hatch. 



G2 



9-28-15 



infert. 



9C2 



4-19-08 



hatch. 



HI 



10-10-15 



infert. 



9D1 



5-23-08 



hatch. 



H2 



10-12-15 



infert. 



9D2 



5-25-08 



hatch. 



11 



10-21-15 



infert. 



9 El 



6-26-08 



hatch. 



■c?I2 



10-23-15 



hatch. 



9E2 



6-28-08 



hatch. 



Jl 



11-15-15 



infert. 



9F1 



S- 9-08 



hatch. 



J2 



11-17-15 



infert. 



9F2 



8-11-08 



hatch. 



Kl 



12-13-15 



infert. 



9G1 



9-20-08 



hatch. 



K2 



12-15-15 

 12-28-15 



infert. 

 infert. 



9G2 



9-22-08 



hatch. 



LI 



c?Al 



3- 2-09 



hatch. 



L2 



12-30-15 



infert." 



9A2 



3- 4-09 



hatch. 



" All of the succeeding 64 eggs produced by this pair — under continued "over- 

 work" — have been tested for fertility. Of these 62 were wholly infertile; the 

 other two hatched (both are males). 



