x Contents. 



CHAPTER VI. 



MOB 



CHARACTERS AS HEREDITARY AND ACQUIRED (Conclusion) 150 



CHAPTER VIL 

 CHARACTERS AS ADAPTIVE AND SPECIFIC . . . .159 



CHAPTER VIII. 



CHARACTERS AS ADAPTIVE AND SPECIFIC (Continual). 



I. Climate loo 



II. Food 217 



III. Sexual Selection 319 



IV. Isolation 323 



V. Laws of Growth 226 



CHAPTER IX. 



CHARACTERS AS ADAPTIVE AND SPECIFIC (Continued) . . 338 



CHAPTER X. 



CHARACTERS AS ADAPTIVE AND SPECIFIC (Concluded} . .351 

 SUMMARY . 



APPENDIX L ON PANMIXIA ,, 



APPENDIX II. ON CHARACTERS AS ADAPTIVE AND SPECIFIC . 307 



NOTE A TO PAGE 57 333 



NOTE B TO PAGE 89 ? 



