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Book contents
- Frontmatter
- Contents
- INSTRUCTION TO BINDER
- ADDITIONS AND CORRECTIONS, TO THE SIXTH EDITION
- HISTORICAL SKETCH
- 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 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 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
- CHAPTER XIV MUTUAL AFFINITIES OF ORGANIC BEINGS: MORPHOLOGY: EMBRYOLOGY: RUDIMENTARY ORGANS
- CHAPTER XV RECAPITULATION AND CONCLUSION
- GLOSSARY OF SCIENTIFIC TERMS
- INDEX
- Plate section
CHAPTER XI - ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS
Published online by Cambridge University Press: 29 August 2010
- Frontmatter
- Contents
- INSTRUCTION TO BINDER
- ADDITIONS AND CORRECTIONS, TO THE SIXTH EDITION
- HISTORICAL SKETCH
- 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 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 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
- CHAPTER XIV MUTUAL AFFINITIES OF ORGANIC BEINGS: MORPHOLOGY: EMBRYOLOGY: RUDIMENTARY ORGANS
- CHAPTER XV RECAPITULATION AND CONCLUSION
- GLOSSARY OF SCIENTIFIC TERMS
- INDEX
- Plate section
Summary
Let us now see whether the several facts and laws relating to the geological succession of organic beings accord best with the common view of the immutability of species, or with that of their slow and gradual modification, through variation and natural selection.
New species have appeared very slowly, one after another, both on the land and in the waters. Lyell has shown that it is hardly possible to resist the evidence on this head in the case of the several tertiary stages; and every year tends to fill up the blanks between the stages, and to make the proportion between the lost and existing forms more gradual. In some of the most recent beds, though undoubtedly of high antiquity if measured by years, only one or two species are extinct, and only one or two are new, having appeared there for the first time, either locally, or, as far as we know, on the face of the earth. The secondary formations are more broken; but, as Bronn has remarked, neither the appearance nor disappearance of the many species embedded in each formation has been simultaneous.
Species belonging to different genera and classes have not changed at the same rate, or in the same degree. In the older tertiary beds a few living shells may still be found in the midst of a multitude of extinct forms.
- Type
- Chapter
- Information
- The Origin of SpeciesBy Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life, pp. 290 - 315Publisher: Cambridge University PressPrint publication year: 2009First published in: 1859