428 



L. V. HEILBEUNN 



TABLE 6 

 Eight-second tests. Temperature, 2^.2'^ 



ACTUAL TIME 



AFTER 



FERTILIZATION 



5 



' 2 



10 

 12 

 14 

 16 

 18 

 20 

 22i 



STANDARD 

 TIME 



26 



28 



30 



321 



35 



371 



40 



42i 

 44f 

 47^ 



53f 

 54i 

 54f 



551 



minutes 



1.8 



4.6 



6.9 



9.2 



11.0 



12.8 



14.7 



16.5 



18.3 



20.6 



23.9 

 25.7 

 27.5 

 29.8 

 32.1 

 34.4 

 36.7 



39.2 

 41.1 

 43.6 

 46.3 



OBSERVATIONS 



Zones show. 



Dark zone shows, but pigment zone does not. 



No zones. Polar bodies just beginning to be lifted off. 



No zones. 



No zones. 



Most eggs lack zones, a very few show dark zone. 



Three zones show plainly. 



Three zones show plainly. 



Dark zone plain, pigment zone not so distinct. 



Most eggs with zones not very distinct. A few eggs 



lack zones completely. 

 No zones. 

 No zones. 

 No zones. 

 No zones. 



No zones. Pronuclei large. 



No zones. Pronuclei large and close to each other. 

 In many eggs zones show quite distinctly. These 



apparently have pronuclei broken down. Some 



eggs lack zones. 

 Three zones show plainly. 

 Three zones show plainly. 

 Three zones show plainly. , 

 No zones. 

 3/50 segmented. 

 7/50 segmented. 

 9/50 segmented. 

 14/25 segmented. 54^ minutes taken as the time of 



segmentation. 

 21 /25 segmented. 



