CONTENTS. 



1. Description of the gross structure of the vertebral column. ... 5 



2. The minute structure of the vertebral column 15 



3. Discussion of the vertebral column of fossil fishes 20 



4. Discussion of the vertebral column of the higher vertebrata. . .24 



5. The origin and development of the vertebrae of Amia dur- 



ing its earlier stages 25 



6. Further consideration of the vertebral column of fossil fishes.. 39 



7. Further discussion of the vertebral structure of Teleostei 42 



8. Further consideration of the vertebral column of living and 



extinct Amphibia 45 



