CONTENTS PREFACE TO THE SECOND EDITION. DETAILED TABLE OF CONTENTS INTRODUCTION. THE DESCENT OF MAN; AND SELECTION IN RELATION TO SEX. INTRODUCTION. PART I. THE DESCENT OR ORIGIN OF MAN. CHAPTER I. THE EVIDENCE OF THE DESCENT OF MAN FROM SOME LOWER FORM. CHAPTER II. — ON THE MANNER OF DEVELOPMENT OF MAN FROM SOME LOWER FORM. CHAPTER III. — COMPARISON OF THE MENTAL POWERS OF MAN AND THE LOWER ANIMALS. CHAPTER IV. — COMPARISON OF THE MENTAL POWERS OF MAN AND THE LOWER ANIMALS, continued. CHAPTER V. — ON THE DEVELOPMENT OF THE INTELLECTUAL AND MORAL FACULTIES DURING CHAPTER VI. — ON THE AFFINITIES AND GENEALOGY OF MAN. CHAPTER VII. — ON THE RACES OF MAN. PART II. SEXUAL SELECTION. CHAPTER VIII. — PRINCIPLES OF SEXUAL SELECTION. CHAPTER IX. — SECONDARY SEXUAL CHARACTERS IN THE LOWER CLASSES OF THE ANIMAL KINGDOM. CHAPTER X. — SECONDARY SEXUAL CHARACTERS OF INSECTS. CHAPTER XI. — INSECTS, continued. CHAPTER XII. — SECONDARY SEXUAL CHARACTERS OF FISHES, AMPHIBIANS, AND REPTILES. CHAPTER XIII. — SECONDARY SEXUAL CHARACTERS OF BIRDS. CHAPTER XIV. — BIRDS—continued. CHAPTER XV. — Birds—continued. CHAPTER XVI. — BIRDS—concluded. CHAPTER XVII. — SECONDARY SEXUAL CHARACTERS OF MAMMALS. CHAPTER XVIII. — SECONDARY SEXUAL CHARACTERS OF MAMMALS, continued. PART III. — SEXUAL SELECTION IN RELATION TO MAN, AND CONCLUSION. CHAPTER XIX. — SECONDARY SEXUAL CHARACTERS OF MAN. CHAPTER XX. — SECONDARY SEXUAL CHARACTERS OF MAN, continued. CHAPTER XXI. — GENERAL A SUMMARY AND CONCLUSION. THE VARIATION OF ANIMALS AND PLANTS UNDER DOMESTICATION. By Charles Darwin IN TWO VOLUMES.-Vol. I. WITH ILLUSTRATIONS CONTENTS OF VOLUME I. FOOTNOTES INTRODUCTION ... Page 1 CHAPTER I. DOMESTIC DOGS AND CATS. ANCIENT VARIETIES OF THE DOG—RESEMBLANCE OF DOMESTIC DOGS IN VARIOUS COUNTRIES TO NATIVE CANINE SPECIES—ANIMALS NOT ACQUAINTED WITH MAN AT FIRST FEARLESS—DOGS RESEMBLING WOLVES AND JACKALS—HABIT OF BARKING ACQUIRED AND LOST—FERAL DOGS—TAN-COLOURED EYE-SPOTS—PERIOD OF GESTATION—OFFENSIVE ODOUR—FERTILITY OF THE RACES WHEN CROSSED—DIFFERENCES IN THE SEVERAL RACES IN PART DUE TO DESCENT FROM DISTINCT SPECIES—DIFFERENCES IN THE SKULL AND TEETH—DIFFERENCES IN THE BODY, IN CONSTITUTION—FEW IMPORTANT DIFFERENCES HAVE BEEN FIXED BY SELECTION—DIRECT ACTION OF CLIMATE—WATER-DOGS WITH PALMATED FEET—HISTORY OF THE CHANGES WHICH CERTAIN ENGLISH RACES OF THE DOG HAVE GRADUALLY UNDERGONE THROUGH SELECTION—EXTINCTION OF THE LESS IMPROVED SUB-BREEDS. CATS, CROSSED WITH SEVERAL SPECIES—DIFFERENT BREEDS FOUND ONLY IN SEPARATED COUNTRIES—DIRECT EFFECTS OF THE CONDITIONS OF LIFE—FERAL CATS—INDIVIDUAL VARIABILITY ... Page 15 CHAPTER II. HORSES AND ASSES.