No. 612] GENESIS OF ORGANIZATION OF INSECT EGG 707 



in size the secondary nuclei increase in number until they 

 entirely surround the primary nucleus, forming several 

 layers. When the oocyte has nearly reached its full 

 growth they begin to migrate from the group near the 

 anterior end of the oocyte and become scattered through- 



tance beneath the periphery. The further history of 

 these bodies is not certain, but they undergo changes by 

 which they lose their identity, since they can not be found 

 in fully grown eggs. Their function is likewise prob- 

 lematical. They may take part in the formation of germ- 

 line determinants which probably occur in the eggs of 



