104 PRINCIPLES OF ANIMAL BIOLOGY 



References 



Dahlgren, U., and W. A. Kepner. A Textbook of the Principles of Animal His- 

 tology, Chapters III and IV. 

 Huxley, J. S. The Individual in the Animal Kingdom. 

 LoEB, J. The Organism as a WTiole. 

 Morgan, T. H. Regeneration. 

 Thompson, J. A. The Study of Animal Life, Chapter V. 



