CONTENTS. v 



CHAPTEK VII. 



ON THE RACES OF MAN. 



The Nature and Value of Specific Characters. — Application to the Races 

 of Man. — Arguments in favor of, and opposed to, ranking the So- 

 called Kaces of Man as Distinct Species. — Sub-species. — Monogenists 

 and Polygenists. — Convergence of Character. — Numerous Points of 

 Eesemblance in Body and Mind between the most Distinct Kaces of 

 Man. — The State of Man when he first spread over the Earth. — Each 

 Pace not descended from a Single Pair. — The Extinction of Paces. — 

 The Formation of Paces. — The Effects of Crossing. — Slight Influence 

 of the Direct Action of the Conditions of Life. — Slight or no Influence 

 of Natural Selection. — Sexual Selection, .... page 206 



PAET H. 



SEXUAL SELECTION. 

 CHAPTER VIII. 



PRINCIPLES OF SEXUAL SELECTION. 



Secondary Sexual Characters. — Sexual Selection. — Manner of Action. — 

 Excess of Males. — Polygamy. — The Male alone generally modified 

 through Sexual Selection. — Eagerness of the Male. — Variability of 

 the Male. — Choice exerted by the Female. — Sexual compared with 

 Natural Selection. — Inheritance, at Corresponding Periods of Life, at 

 Corresponding Seasons of the Year, and as limited by Sex. — Relations 

 between the Several Forms of Inheritance. — Causes why one Sex and 

 the Young are not modified through Sexual Selection. — Supplement on 

 the Proportional Numbers of the two Sexes throughout the Animal 

 Kingdom. — On the Limitation of the Numbers of the two Sexes 

 through Natural Selection, -..«..... p. 245 



CHAPTER IX. 



SECONDARY SEXUAL CHARACTERS IN THE LOWER CLASSES OF THE ANIMAL 



KINGDOM. 



These Characters absent in the Lowest Classes. — Brilliant Colors. — Mol- 

 lusca. — Annelids. — Crustacea, Secondary Sexual Characters strongly 

 developed; Dimorphism; Color; Characters not acquired before 

 Maturity. — Spiders, Sexual Colors of; Stridulation by the Males. — 

 Myiiapoda, p. 312 



