x Contents. 



CHAPTER IX. 



fAGB 



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 257 443 



NOTE B TO PAGE 295 445 



NOTE C TO PAGE 394 . .448 



INDEX ..... 451 



