x Contents. 



CHAPTER IX. 



PAGE 



CRITICISMS OF THE THEORY OF NATURAL SELECTION . . 333 



CHAPTER X. 



THE THEORY OF SEXUAL SELECTION, AND CONCLUDING 



REMARKS ... 379 



APPENDIX TO CHAPTER V 421 



NOTE A TO PAGE 2^7 443 



NOTE B TO PAGE 295 44=, 



NOTE C TO PAGE 394 448 



INDEX 



45' 



