Table of Contents INTRODUCTION PART ONE Descent or origin of man

1. The evidence of the descent of man from some lower form.
2. On the manner of development of man from some lower form.
3. Comparison of the mental powers of man and the lower animals.
4. Comparison of the mental powers of man and the lower animals (continued).
5. On the development of the intellectual and moral faculties
6. On the affinities and genealogy of man.
7. On the races of man. Note on the resemblances and differences in the structure and the development of the brain in man and apes. by Professor Huxley, F.R.S.

PART TWO Sexual selection

8. Principles of sexual selection. —Laws of inheritance. —Birds. —Fish. —Insects.
9. Secondary sexual characters in the lower classes of the animal kingdom.
10. Secondary sexual characters of insects.
11. Insects, continued: order lepidoptera. —Butterflies and moths.
12. Secondary sexual characters of fishes, amphibians and reptiles.
13. Secondary sexual characters of birds.
14. Birds (continued).
15. Birds (continued).
16. Birds-concluded. —Rules or classes of cases.
17. Secondary sexual characters of mammals.
18. Secondary sexual characters of mammals (continued).

PART THREE Sexual selection in relation to man and conclusion.

19. Secondary sexual characters of man.
20. Secondary sexual characters of man (continued).
21. General summary and conclusion.

SUPPLEMENTAL NOTE On sexual selection in relation to monkeys.