viii COLOR CHANGES IN ANIMALS 



Carpenter of the Museum of Comparative Zoology for 

 his care in the preparation of the illustrations as well 

 as to the editors of the following publications for the 

 privilege of reproducing the figures accredited to these 

 sources: the Journal of Experimental Zoology , the Bio- 

 logical Bulletin, the Journal of Experimental Biology, the 

 Journal of General Physiology, the Proceedings of the 

 National Academy of Sciences, and the Proceedings of 

 the American Philosophical Society. 



The generous provisions for publication made by the 

 Committee on the Leidy Memorial Lecture are very 

 fully appreciated. 



