vi COLOR CHANGES IN ANIMALS 



he had awakened in them for even so dry a topic. With 

 his pencil he pointed out the chief apertures in the bony 

 brain-case and told the children of their uses. When 

 he came to the largest opening he called it by its tech- 

 nical name, the foramen magnum. He then remarked 

 that this sounded very learned but he would warn them 

 not to be overawed by such high-flown names and to 

 remember that to an old Roman the Latin words merely 

 meant a big hole. This simple experience in the use of 

 scientific terms was a revelation to me and gave me a 

 respect for the common English equivalents which I 

 have never lost. A lesson of this kind meant more to 

 me in my subsequent life as a teacher of zoology than 

 pages of pedagogics. 



Would that in the delivery of this discourse I could 

 reawaken in you the childlike, lifelong enthusiasm that 

 Dr. Leidy had for the study of Nature in all its fasci- 

 nating aspects, and would that I could stir in you the 

 generous impulses that in a second Dr. Leidy made these 

 lectures possible. 



G. H. Parker 



Harvard Biological Laboratories 

 March, 1936 



