CONTENTS, OE SYSTEMATIC INDEX. 



CHAPTER I. 



CHAEACTERS OF TEKTEBBATES. 



SECTION 



1. Developmental character 



2. Structural characters 



3. Piscine modificatiou 



4. Reptilian modification 



5. Avian modification 



6. Mammalian modification 



7. Genetic and thermal distinctions 



8. Sub-classes of Htematocrya, or Cold-blooded Vertebrate 



9. Orders of Hseniatocrya 



PAOK 



1 

 3 



4 

 5 

 6 

 6 

 6 

 7 

 9 



CHAPTER II. 



OSSEOUS SYSTEM OF IlyEMATOCEYA. 



10. Composition of Bone 

 '' H. Development of Bone 



12. Growth of Bone 



13. Classes of Bone 



14. Type-segment, or Vertebra 

 1.5. Archetype Skeleton 



16. Development of Vertebras 



17. Vertebral column of Fishes 



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 Pterosauria 



26. Development of the SkuE 



27. Skull of Plagiostomi 



28. SkuU of Protopteri 



19 

 21 

 23 

 26 



27 



29 



3(1 



34 



46 



60 



51 



S3 



57 



60 



65 



70 



71 



76 



82 



