CONTENTS, OR SYSTEMATIC INDEX. 



CHAPTER I. 

 CHARACTERS OF VERTEBRATES. 



SECTION PAGE 



1. Developmental characters 1 



2. Structural characters .......... 3 



3. Piscine modification .......... 4 



4. Reptilian modification .......... 5 



5. Avian modification .......... 6 



6. Mammalian modification ......... 6 



7. Genetic and thermal distinctions ........ 6 



8. Sub-classes of Hasmatocrya, or Cold-blooded Vertebrates ... 7 



9. Orders of Hsematocrya 9 



CHAPTER II. 



OSSEOUS SYSTEM OP HSEMATOCRYA. 



10. Composition of Bone 



11. Development of Bone 



12. Growth of Bone 



13. Classes of Bone 



14. Type-segment, or Vertebra 



15. Archetype Skeleton 



16. Development of Vertebrae 



17. Vertebral column of Pishes 



18. Vertebral column of Batrachia 



19. Vertebral column of Ichthyopterygia 



20. Vertebral column of Sauropterygia 



21. Vertebral column of Ophidia 



22. Vertebral column of Lacertia 



23. Vertebral column of Chelonia 



24. Vertebral column of Crocodilia 



25. Vertebral column of Ptcrosauria 



26. Development of the Skull 



27. Skull of Plagiostomi 



28. Skull of Protopteri 



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