Plate II. 



Perivitelline Space. 



|p Cells of the discus 

 W proligerus. 



" Oorona radiata. 

 - Germinal 



Protoplasmic Zone 



Cortina radiata 



Zona pellucida. 



Deutoplasmic Zone. 



Perivitelline Space. 



( G-erminal Vesicle, 

 } with an amoeboid 

 ^germinal Spot. 



FIG. 2. 



Clear Outer Zone. 

 FIG. l.Deutoplasm- forming ovum from a Graaftan follicle of a woman 27 years old (Nagel). 



FIG. 2. -Fresh ovum from Graafian follicle of a woman 30 years old; slightly reduced from 

 the original figure (Nagel). 



