PLATE 111. 



OVA Ob' THE COMMON STICKLEBACK. 

 PRODUCTION OL 1 ' NEW LIVING CENTRES IN PRE-EXISTING LIVING MATTER. 



varian ova undergoing <U:- 



the midst of a 

 ed of cells. Magnified 6W 

 diameters. 



U\ arian ovum, with large terrainal vesicle. 

 The yolk cracked and exhibiting fissures ra- 

 diating outwards. Magnified 100 diameters. 



Fig. 9. 



Wig. lo. 



>. 11. 



n:il spots, 

 centres within them, x 1 



Germinal spots, with new centres (micleoh) 



witljin them, and more mmut.- -_V ruiinal soots 



in the interval." between th<;m. X 500." 



ICOOth of an i 



215. 





