BIO-DYNAMICS 79 



world came into existence because of some use the bio- 

 economic use in particular being in the long run the chief 

 determinant of survival. Organisms, moreover, live not only 

 by virtue of, but also in spite of, what they are. In other 

 words, there are both positive and negative confluents in the 

 dynamic make-up of organisms and of species. Every organism 

 thus has bequeathed to it a legacy of positive as well as nega- 

 tive ancestral dynamics, the former being connected with the 

 original bio-economic use (and the resulting symbiogenesis), 

 answerable for the evolution of the particular species, and the 

 latter with subsequent anti-symbiotic developments and their 

 correlations. 



For brevity's sake, instead of speaking of original positive 

 ancestral dynamics and subsequent negative ancestral 

 dynamics, I propose to introduce the terms " symbiotics" and 

 " anti-biotics " respectively for the particular kinds of 

 influences with which I am here more especially concerned. 



That there is a need for these terms is apparent in many 

 ways. Prof. G. Klebs thinks that a special term is necessary to 

 account for the fact that the systems of two allied species or 

 varieties show a constant difference in their reaction to a 

 similar environment. This he proceeds to do by saying that 

 the "specific structure" is different in each case as, indeed, 

 it must be. 



In the original (italics mine) cell, eventually also in every 

 cell of the plant, the characters which afterwards become 

 apparent, must exist somewhere; they are integral parts of the capaci- 

 ties or potentialities of specific structure. Thus not only the characters 

 which are exhibited under ordinary conditions in nature, but also many 

 others which become apparent only under special conditions, are to be 

 included as such potentialities in cells; the conception of specific struc- 

 ture includes the whole of the potentialities of a species; specific 

 structure comprises that which we must assume without being able to 

 explain it. 



Seeing that we are here concerned with "potentialities" 

 and with the " inner world " of organisms, with functions and 

 conditions of relatedness, it seems that a dynamic conception 



