Fig. 1 



Fig. 2 



Fig. 3 



Fig. 4 



Fig. 5 



Fig. 6 





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Fig. 7 



Fig. 8 



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 Fig. 9 



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Fig. 10 



Fig. 11 



Fig. 12 



Fig. 13 



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Fig. 14 





Fig. 15 



Fig. 16 



Plate I. (From the Journal of Morphologij) 



Figs. 1-5. Nuclei of ova from ovary of rat 5 days post partum. 1, Deutobroch 

 nucleus in germinal epithelium. 2, Leptotene nucleus. 3, Synizesis. 4, Pachynema. 

 5, Diplonema. 



Figs. 6-9. Nuclei of ova from ovary of rat 8 days post partum. 6, Deutobroch 

 nucleus. 7, Synizesis. 8, Stage following 7, evidently modified pachynema. 9, Dip- 

 lonema. 



Figs. 10-13. Nuclei of ova from ovary of rat 10 days post partum. 10, Deutobroch 

 nucleus. 11, Synizesis. 12, Modified pachynema. 13, Diplonema. 



Figs. 14-16. Nuclei of ova from ovary of rat 15 days post partum. 14, Deutobroch 

 nucleus. 15, Modified pachynema. 16, Masses of chromatin changing into loose 

 threads. 



12 



