36 



THE EGGS OF MAMMALS 



That the growth of the folHcle beyond the antrum stage 

 is independent of the growth of the ovum is amply evident 

 from the data presented by Brambell (1928), Parkes (1931) 



90 



P 70 



fe 60 

 O 



g 50 



H 

 W 

 S 40 



< 



SO 



20 



(b) 



• OBSERVATIONS 



X CALCULATED POINTS 



100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 

 DIAMETER OF FOLLICLE, fx. 



Fig, 10. Same as Fig, 7, Data on the pig, (From the Proceedings of the Royal 



Society.) 



and Pincus and Enzmann (19366). In Table III are presented 

 the data collected by Parkes on the relation of ovum size 

 to body weight and follicle size in seven species of mammals. 



200 400 



600 



800 



1000 1200 1400 1600 1800 



DIAMETER OF FOLLICLE 

 Fig, 11. Same as Fig. 7. Data on the rabbit. The lower curve represents 

 ovum diameter plotted against folhcle diameter for the nine types of follicles 

 (see Plate III) distinguished by Pincus and Enzmann, 19366. 



Figures 7 to 10 relate the various diameters of ova to the 

 diameters of the enclosing follicles. In the rabbit, Pincus 

 and Enzmann (19366) have identified 9 types of follicles 

 each distinguished by characteristic features of the develop- 

 ing ovum, granulosa and theca (see Plate III). When the 



