PAGE NOTE. By R. A. Streatfeild viii INTRODUCTION. By Professor Marcus Hartog ix AUTHOR’S PREFACE xxxvii CHAPTER I. Introduction—General ignorance on the subject 1 of evolution at the time the “Origin of Species” was published in 1859 CHAPTER II. How I came to write “Life and Habit,” and 12 the circumstances of its completion CHAPTER III. How I came to write “Evolution, Old and 26 New”—Mr Darwin’s “brief but imperfect” sketch of the opinions of the writers on evolution who had preceded him—The reception which “Evolution, Old and New,” met with CHAPTER IV. The manner in which Mr. Darwin met 38 “Evolution, Old and New” CHAPTER V. Introduction to Professor Hering’s lecture 52 CHAPTER VI. Professor Ewald Hering “On Memory” 63 CHAPTER VII. Introduction to a translation of the 87 chapter upon instinct in Von Hartmann’s “Philosophy of the Unconscious” CHAPTER VIII. Translation of the chapter on “The 92 Unconscious in Instinct,” from Von Hartmann’s “Philosophy of the Unconscious” CHAPTER IX. Remarks upon Von Hartmann’s position in 137 regard to instinct CHAPTER X. Recapitulation and statement of an objection 146 CHAPTER XI. On Cycles 156 CHAPTER XII. Refutation—Memory at once a promoter and a 161 disturber of uniformity of action and structure CHAPTER XIII. Conclusion 173 Note