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W. B. KIRKHAM AND H. S. BURR 







Fig. 2 Earliest observed maturation phenomena — increase in size of follicle. 

 X 90. 



Fig. 3 Follicle of egg with first polar spindle shown in figure 10 of Plate II. 

 X90. 



Fig. 4 Follicle of egg with first polar body and second polar spindle shown 

 in figure 11 of Plate III. X 90. 



