CHAPTER 1.8. THE GASTRAEA THEORY.


CHAPTER 1.9. THE GASTRULATION OF THE VERTEBRATE.


CHAPTER 1.10. THE COELOM THEORY.


CHAPTER 1.11. THE VERTEBRATE CHARACTER OF MAN.


CHAPTER 1.12. THE EMBRYONIC SHIELD AND GERMINATIVE AREA.


CHAPTER 1.13. DORSAL BODY AND VENTRAL BODY.


CHAPTER 1.14. THE ARTICULATION OF THE BODY.


CHAPTER 1.15. FOETAL MEMBRANES AND CIRCULATION.



LIST OF ILLUSTRATIONS.

PORTRAIT OF ERNST HAECKEL FROM THE PAINTING BY FRANZ VON LEUBACH, 1899
(REPRODUCED BY "JUGEND").