CONTENTS. V 



CHAPTER VII. 



ON THE RACES OF MAN. 



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

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

 called Eaces 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 Eaces of 

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

 Eace not descended from a Single Pair.— The Extinction of Eaces. — 

 The Formation of Eaces. — The Effects of Cx*ossing. — Slight Influence 

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

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



PART II. 



sexual selection: 



CHAPTEE 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. — Eelations 

 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 



CHAPTEE 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. — Spidei-s, Sexual Colors of; Stridulation by the Males. — 

 Myiiapoda, p. 312 



