AUTHOR'S PREFACE.

EDITORS' PREFACE.

CONTENTS.

THE DURATION OF LIFE. PREFACE.

I. THE DURATION OF LIFE.

ON HEREDITY. PREFACE.

II. ON HEREDITY.

LIFE AND DEATH. PREFACE.

III. LIFE AND DEATH.

CONTINUITY OF THE GERM-PLASM, and c. PREFACE.

CONTINUITY OF THE GERM-PLASM, and c. CONTENTS. Introduction 165

IV. THE CONTINUITY OF THE GERM-PLASM AS THE FOUNDATION OF A THEORY OF HEREDITY. Introduction.

SIGNIFICANCE OF SEXUAL REPRODUCTION, ETC. PREFACE.

SIGNIFICANCE OF SEXUAL REPRODUCTION, etc. CONTENTS. PAGE 1 Can

V. THE SIGNIFICANCE OF SEXUAL REPRODUCTION IN THE THEORY OF NATURAL SELECTION.

ON THE NUMBER OF POLAR BODIES AND THEIR SIGNIFICANCE IN HEREDITY. PREFACE.

ON THE NUMBER OF POLAR BODIES, and c. CONTENTS. PAGE I.

VI. ON THE NUMBER OF POLAR BODIES AND THEIR SIGNIFICANCE IN HEREDITY. I. Parthenogenetic and Sexual Egg.

VII.

VIII. THE SUPPOSED TRANSMISSION OF MUTILATIONS.

INDEX.

The cover image was created by the transcriber and is placed in the public domain.