:;7S MARGARET FLOY WASHBURN 



Lund (16) contributes a brief report of observations on the 

 reactions to light of animals which themselves produce light. 

 Some of the behavior which he studied was that of insects, but 

 among the lower invertebrates he noticed that certain luminous 

 ostracods respond to the stimulus of light by emitting a luminous 

 secretion, and that some of the Cirratulidae and Syllidae are 

 attracted to a source of light and to each other when emitting 

 light. Thus in these forms the self -produced light cooperates 

 with a positive phototropism to bring about reproduction. 



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