THE TUIVUFH OF LIFE 



type of association if it is to continue. The 

 course of unity here pursues a higher path. The 

 crab with his fully developed eyes sees the sea- 

 anemone. The organ that in the deep sea we 

 found as a weapon in the wild conflict of all 

 against all has here become an organ of sympa- 

 thy. At the same time it makes co-operation 

 possible. Nerve need not grow to nerve or body 

 to body. These beings can understand each 

 other as far as their visual power reaches. 



The crab and the sea-anemone live without 

 being organically connected. But this wonder- 

 ful shining yellow color of the sea-anemone 

 brings us to a new example. It does not belong 

 essentially to the sea-anemone itself. Certain 

 cells in the upper surface of the mass of the 

 body are colored golden yellow. These cells 

 exist loose in the mass. They are living, but 

 they live entirely apart from the anemone. It 

 is an animal. These yellow cells are plants. 

 Nevertheless the anemone has not swallowed 

 them as nourishment, has not killed them, since 

 they are in no way digested. They live happily 

 within it. They live in an absolutely free as- 

 sociation without eating and without being 

 eaten, only deriving advantage from each other. 

 Their respiration is reciprocally supplementary. 

 The sea-anemone as an animal gives the yellow 

 plant cells carbonic acid and proteids. The lit- 

 tle plants on the other hand give oxygen to the 

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