CHAPTER 2.23. OUR APE ANCESTORS.


CHAPTER 2.24. EVOLUTION OF THE NERVOUS SYSTEM.


CHAPTER 2.25. EVOLUTION OF THE SENSE-ORGANS.


CHAPTER 2.26. EVOLUTION OF THE ORGANS OF MOVEMENT.


CHAPTER 2.27. EVOLUTION OF THE ALIMENTARY SYSTEM.


CHAPTER 2.28. EVOLUTION OF THE VASCULAR SYSTEM.


CHAPTER 2.29. EVOLUTION OF THE SEXUAL ORGANS.


CHAPTER 2.30. RESULTS OF ANTHROPOGENY.


LIST OF ILLUSTRATIONS.

FIGURE 2.210. THE LANCELET.

FIGURE 2.211. SECTION OF THE HEAD OF THE LANCELET.