338 SYMBIOGENESIS 



behaviour," i.e., as I would also call it, a preservation of 

 cosmic loyalty. 



It is precisely from such a symbiogenetically loyal, and 

 therefore well-balanced, and not over-specialised animal as this 

 Marsupial, that, in my opinion, long lines of ascending species 

 possibly man himself may well have sprung. We have 

 seen that organisms in order to become progenitors of per- 

 manent races, must make their adaptations congruous with the 

 general symbiogenetic advance of the world, and that this 

 advance gives the chief direction to their evolutionary process. 

 Adaptations and specialisations, per se, we found to be not 

 enough, and we have seen further, that they may be actually 

 injurious (in a permanent sense) when attended by loss of vital 

 symbiogenetic correspondence. 



Nature works with long, i.e., with symbiogenetic roots, 

 and an organism which is oblivious of these roqts and attempts 

 to live by short cuts, will eventually find itself deprived of its 

 main support. Wherever great and permanent good results 

 are to be achieved, therefore, loyalty to great bio-moral 

 principles is required, and this does not permit of over- 

 adaptation in any particular direction, but requires restraint 

 and harmonious adaptation. That a progressive species does 

 not live for itself merely is expressed by its harmonious, i.e., 

 cosmic adaptation and by its well-balanced structure. 



It is significant that, according to Albertina Carlsson 

 (Knowledge, June, 1914), one tree-kangaroo, Dendrolagus 

 dorianus, is distinguished from the typical members of the 

 family (Macropodidce) in not showing the usually conspicuous 

 disproportion between fore limbs and hind limbs. It some- 

 times walks on the ground with both hands down, or with only 

 one; it sometimes climbs with its hands gripping the branches. 



This example seems again to indicate that physiological 

 change precedes morphological, and, we may add, that if this 

 change happens to be a symbiogenetic change it does more ; it 

 predetermines subsequent variation and subsequent evolution 



