62 



SUPER-ORGANIC EVOLUTION 



Haeckel says, " ontogeny amounts to an abbrevia- 

 tion of phylogeny." The thousands of years which 



FIG. 12. 



Cellular series to show the evolutive phases through which the pyramidal cell 

 of the brain passes, a, neuroblastoderm, in which there is a sketch of 

 the cylindric axis, but without any protoplasmic shoot ; b, commencement 

 of the protoplasmic shoot and of the ramifications which will form the 

 terminal tuft ; c, the protoplasmic shoot and the ramifications advance 

 to a certain development ; d, appearance of the collaterals of the cylindric 

 axis ; e, formation of the protoplasmic expansions in the trunk and in 

 the shoot. (After S. R. y Cajal. ) 



the animal organisation has required to rise up to 

 man are fulfilled by man in the short space of nine 

 months. 



