CONTENTS 



PAGE 

 INTRODUCTION: MUTATION, MENDELISM, AND NATURAL 



SELECTION ....;.... xiii 



I. A NATURALIST'S CONTRIBUTION TO THE DIS- 

 CUSSION UPON THE AGE OF THE EARTH 

 (Liverpool, 1896) : i ' I 



Ifc-'WHAT is A SPECIES?' (London, 1904) . . 46 

 life- THEORIES OF EVOLUTION (Boston, 1894) . . 95 

 IV. THEORIES OF HEREDITY (Oxford, 1889) .120 



V. THE BEARING OF THE STUDY OF INSECTS UPON 

 THE QUESTION 'ARE ACQUIRED CHARAC- 

 TERS HEREDITARY?' (London, 1905) * .139 



VI. A REMARKABLE ANTICIPATION OF MODERN 



VIEWS ON EVOLUTION (1897) . . . .173 



VII. THOMAS HENRY HUXLEY AND THE THEORY 



OF NATURAL SELECTION (Birmingham, 1905) . 193 



VIII. NATURAL SELECTION THE CAUSE OF MIMETIC 

 RESEMBLANCE AND COMMON WARNING 

 COLOURS (London, 1898) 220 



IX. MIMICRY AND NATURAL SELECTION (Berlin, 1901) 271 



X. THE PLACE OF MIMICRY IN A SCHEME OF 



DEFENSIVE COLORATION (Leeds, 1890) . . 393 



APPENDIX : A CLASSIFICATION AND INDEX OF THE 

 EXAMPLES OF MIMICRY QUOTED IN THE TEXT . 383 



ANALYTICAL INDEX 395 



