A PLEA FOR OBSERVATION OF THE HABITS OF FISHES 

 AND AGAINST UNDUE GENERALIZATION 



By Theodore Gill, Ph. D., LL. D. 



Hcmorary Associate in Zoology, Smithso7iian histitutioji 



Address before the Fourth International Fishery Congress 

 held at Washington, U. S. A., September 22 to 26, 1908 



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