CONTENTS. 



Tortoise 



Structure of the Skull of the Python 



The Maxillary Arch 



Skull of the Boa-Constrictor 



The Mandibular Arch . 



Skull of Poisonous Serpents 



Vertebrae of the Rattlesnake 



Vertebrae of Serpents . 



Osteology of Lizards . 



Skeleton of the Crocodile 



Vertebrae and Skull of the Crocodile 



Limbs of the Crocodile 



Osteology of Chelonian Reptiles 



Carapace of the Turtle 



Plastron of the Turtle 



Vertebrae, Skull, and Limbs of th 



The Skeleton of Birds 



Of the Swan 



Of the Duck Tribe 



Pelvis and Leg of Birds 



Structure of the Foot in Birds 



Mechanism of Flight in Birds 



Forms of the Skeleton in the Class Mammali 



Various Forms of Limbs in Mammals . 



Skeleton of the Whale ... 



Of the Dugong ..... 



Of the Seal . . . . • 



Of the Walrus 



Skeletons of Hoofed Quadrupeds . 



Of the Horse ..... 



Of the Rhinoceros .... 



Of the Giraffe 



Skeletons of Herbivorous Quadrupeds . 

 Of the Camel ..... 

 Of the Hippopotamus .... 

 Ostcological Characters of even-toed Hoofed 

 The Nature of Limbs .... 

 The Protopterus ..... 

 Law of Simplification of Feet 

 The Amphiuma and the Proteus . 

 The Tarsal Bones of the Horse and the Ox 



and T 



urtle 



Beasts 



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