K.rperhneitfiil Embrij'.ilmjij. 



result that each n& 

 the medullary folt 





Lioux sees in many of the above 



the importance of self differentiatioi 

 ology, and also emphasizes the self 

 as the most essential conn o cl 1 . 



The interaction of the various pa 

 under various heads not understood 

 methods insisted upon by Roux. 1 

 tation, struggle of organs, and mech 



This last factor was emphasized b 

 upon the elasticity of the germ lave 



resulted if there had been a tens 

 a chick forty hours old the ren: 

 any gaping open of the rnedu 

 expected if lateral pressure had 

 a younger embryo proceeded 



evidently. 



