Studies in the Theory of Descent, Volume I
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STUDIES IN THE THEORY OF DESCENT.
PREFATORY NOTICE.
TRANSLATOR’S PREFACE.
PREFACE TO THE ENGLISH EDITION.
CONTENTS.
STUDIES IN THE THEORY OF DESCENT.
Part I. ON THE SEASONAL DIMORPHISM OF BUTTERFLIES.
I. The Origin and Significance of Seasonal Dimorphism.
II. Seasonal Dimorphism and Climatic Variation.
III. Nature of the Causes producing Climatic Varieties.
IV. Why all Polygoneutic Species are not Seasonally Dimorphic.
V. On Alternation of Generations.
VI. General Conclusions.
APPENDIX I. EXPERIMENTS.
APPENDIX II.
EXPLANATION OF THE PLATES.
II. Seasonal Dimorphism and Climatic Variation.
III. Nature of the Causes producing Climatic Varieties.
IV. Why all Polygoneutic Species are not Seasonally Dimorphic.
V. On Alternation of Generations.
VI. General Conclusions.
APPENDIX I. EXPERIMENTS.
APPENDIX II.
EXPLANATION OF THE PLATES.
STUDIES IN THE THEORY OF DESCENT.
Part II. ON THE FINAL CAUSES OF TRANSFORMATION.
I. THE ORIGIN OF THE MARKINGS OF CATERPILLARS.
INTRODUCTION.
I. Ontogeny and Morphology of Sphinx-Markings.
II. Conclusions from Phylogeny.
III. Biological Value of Marking in General.
IV. Biological Value of Colour.
V. Biological Value of Special Markings.
VI. Objections to a Phyletic Vital Force.
VII. Phyletic Development of the Markings of the Sphingidæ: Summary and Conclusion.
INTRODUCTION.
I. Ontogeny and Morphology of Sphinx-Markings.
II. Conclusions from Phylogeny.
III. Biological Value of Marking in General.
IV. Biological Value of Colour.
V. Biological Value of Special Markings.
VI. Objections to a Phyletic Vital Force.
VII. Phyletic Development of the Markings of the Sphingidæ: Summary and Conclusion.
II. ON PHYLETIC PARALLELISM IN METAMORPHIC SPECIES.
INTRODUCTION.
INTRODUCTION.
FOOTNOTES
Transcriber’s Notes
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