CONTENDS. 



CHAPTER I. 



PAGE 



Preliminary Observations 5 



CHAPTER II. 

 On the Anterior Limbs of Quadrupeds .... 24 



CHAPTER in. 

 Anterior Limbs of Birds, Reptiles, and Fishes ... 65 



CHAPTER IV. 

 On the Equivalents of the Hand as an organ of Toucli . 100 



CHAPTER V. 



On the Spinal Column of Quadrupeds . . . .126 



a2 



