70 



HAYATO ARAI 



the sake of simplicity, I have averaged these numbers by litters 

 as in table 6, and I shall discuss my findings as they appear in 

 this latter table. 



TABLE 6 



The average number of ova in the left surviving ovary, and in the left ovary of the 



control, together with the number in the right ovary of the test rats, 



removed at twenty days of age. Based on table 5 



WEEKS AFTER 

 OPERATION 



BODY 

 WEIGHT 



WEIGHT 

 OF LEFT 

 SURVIV- 

 ING 

 OVARY 



TOTAL 

 NUMBER 

 OF OVA 



IN LEFT 

 SURVIV- 

 ING 

 OVARY 

 AND LEFT 

 CONTROL 

 OVARY 



NUMBER 

 OF WELL 

 DEVEL- 

 OPED 

 FOLLI- 

 CLES 



NUMBER OF 



DEGENERATE 



FOLLICLES 



Middle- 

 sized 



Large 



CORPORA 



LUTEA 



TOTAL 

 NUMBER 

 OF OVA 

 IN RIGHT 



OVART 



REMOVED 



AT 20 



DAYS 



Series I. With males 



Series II. Without males 



Corpora lutea in control. 



