a ADAPTATION 

 INTRODUCTORY KEMARKS ON EEGULATIONS IN GENERAL 



WE have finished our long account of individual morpho- 

 genesis proper. If we look back upon the way we have 

 traversed, and upon those topics in particular which have 

 yielded us the most important general results, the 

 material for the higher analysis which is to follow, it 

 must strike us, I think, that all these results relate to 

 regulations. In fact, it is " secondary ' form-regulations, 

 according to our terminology, that we have been study- 

 ing under the names of equifinality, back-differentiation, 

 restitution of the second order, and so on, and our harmonious- 

 equipotential systems have figured most largely in processes 

 of secondary form-regulations also. But even where that 

 has not been the case, as in the analysis of the potencies of 

 the germ in development proper, form-regulations of the 

 other type have been our subject, regulations of the primary 

 or immanent kind, the connection of normal morphogenetic 

 events being regulatory in itself. It was not the pheno- 

 menon of organic regulation as such that afforded us the 

 possibility of establishing our proof of the autonomy of 

 morphogenesis : that possibility was afforded us by the 

 analysis of the distribution of potencies ; but upon this 



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