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  4. Index of On the Origin of Species 6th Edition by Charles Darwin
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  6. INTRODUCTION.
    CHAPTER I. VARIATION UNDER DOMESTICATION.
    CHAPTER II.  VARIATION UNDER NATURE.
    CHAPTER III.  STRUGGLE FOR EXISTENCE.
    CHAPTER IV. NATURAL SELECTION; OR THE SURVIVAL OF THE FITTEST.
    CHAPTER IV. NATURAL SELECTION; OR THE SURVIVAL OF THE FITTEST.(SUMMARY OF CHAPTER).
    CHAPTER V. LAWS OF VARIATION.
    CHAPTER VI.  DIFFICULTIES OF THE THEORY.
    CHAPTER VII.  MISCELLANEOUS OBJECTIONS TO THE THEORY OF NATURAL SELECTION.
    CHAPTER VIII.  INSTINCT.
    CHAPTER IX.  HYBRIDISM.
    CHAPTER IX. HYBRIDISM. (SUMMARY OF CHAPTER).
    CHAPTER X. ON THE IMPERFECTION OF THE GEOLOGICAL RECORD.
    CHAPTER XI.  ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS.
    CHAPTER XII.  GEOGRAPHICAL DISTRIBUTION.
    CHAPTER XIII. GEOGRAPHICAL DISTRIBUTION—­continued. (FRESH-WATER PRODUCTIONS.)
    CHAPTER XIV. MUTUAL AFFINITIES OF ORGANIC BEINGS: (CLASSIFICATION).
    CHAPTER XV.  RECAPITULATION AND CONCLUSION.