CONTENTS. |
|
PART II. |
SEXUAL SELECTION—continued. |
| CHAPTER XII. |
| Secondary Sexual Characters of Fishes, Amphibians,and Reptiles. |
| Fishes: Courtship and battles of the males—Larger size of thefemales—Males, bright colours and ornamental appendages;other strange characters—Colours and appendages acquired bythe males during the breeding-season alone—Fishes with bothsexes brilliantly coloured—Protective colours—The less conspicuouscolours of the female cannot be accounted for on theprinciple of protection—Male fishes building nests, and takingcharge of the ova and young. Amphibians: Differences instructure and colour between the sexes—Vocal organs. Reptiles:Chelonians—Crocodiles—Snakes, colours in some casesprotective—Lizards, battles of—Ornamental appendages—Strangedifferences in structure between the sexes—Colours—Sexualdifferences almost as great as with birds | [1-37] |
| CHAPTER XIII. |
| Secondary Sexual Characters of Birds. |
| Sexual differences—Law of battle—Special weapons—Vocalorgans—Instrumental music—Love-antics and dances—Decorations,permanent and seasonal—Double and single annualmoults—Display of ornaments by the males | [38-98] |
| CHAPTER XIV. |
| Birds—continued |
| Choice exerted by the female—Length of courtship—Unpairedbirds—Mental qualities and taste for the beautiful—Preferenceor antipathy shewn by the female for particular males—Variabilityof birds—Variations sometimes abrupt—Laws of variation—Formationof ocelli—Gradations of character—Case ofPeacock, Argus pheasant, and Urosticte | [99-153] |
| CHAPTER XV. |
| Birds—continued. |
| Discussion why the males alone of some species, and both sexesof other species, are brightly coloured—On sexually-limitedinheritance, as applied to various structures and to brightly-colouredplumage—Nidification in relation to colour—Loss ofnuptial plumage during the winter | [154-182] |
| CHAPTER XVI. |
| Birds—continued. |
| The immature plumage in relation to the character of the plumagein both sexes when adult—Six classes of cases—Sexual differencesbetween the males of closely-allied or representative species—Thefemale assuming the characters of the male—Plumage ofthe young in relation to the summer and winter plumage of theadults—On the increase of beauty in the Birds of the World—Protectivecolouring—Conspicuously-coloured birds—Noveltyappreciated—Summary of the four chapters on birds | [183-238] |
| CHAPTER XVII. |
| Secondary Sexual Characters of Mammals. |
| The law of battle—Special weapons, confined to the males—Causeof absence of weapons in the female—Weapons common to bothsexes, yet primarily acquired by the male—Other uses of suchweapons—Their high importance—Greater size of the male—Meansof defence—On the preference shewn by either sex in thepairing of quadrupeds | [239-273] |
| CHAPTER XVIII. |
| Secondary Sexual Characters of Mammals.—continued. |
| Voice—Remarkable sexual peculiarities in seals—Odour—Developmentof the hair—Colour of the hair and skin—Anomalouscase of the female being more ornamented than the male—Colourand ornaments due to sexual selection—Colour acquiredfor the sake of protection—Colour, though common to bothsexes, often due to sexual selection—On the disappearance ofspots and stripes in adult quadrupeds—On the colours andornaments of the Quadrumana—Summary | [274-315] |
| CHAPTER XIX. |
| Secondary Sexual Characters of Mammals.—continued. |
| Differences between man and woman—Causes of such differencesand of certain characters common to both sexes—Law of battle—Differencesin mental powers—and voice—On the influenceof beauty in determining the marriages of mankind—Attentionpaid by savages to ornaments—Their ideas of beauty in woman—Thetendency to exaggerate each natural peculiarity | [316-354] |
| CHAPTER XX. |
| Secondary Sexual Characters of Man—continued. |
| On the effects of the continued selection of women according to adifferent standard of beauty in each race—On the causes whichinterfere with sexual selection in civilised and savage nations—Conditionsfavourable to sexual selection during primevaltimes—On the manner of action of sexual selection with mankind—Onthe women in savage tribes having some power tochoose their husbands—Absence of hair on the body, and developmentof the beard—Colour of the skin—Summary | [355-384] |
| CHAPTER XXI. |
| General Summary and Conclusion. |
| Main conclusion that man is descended from some lower form—Mannerof development—Genealogy of man—Intellectual andmoral faculties—Sexual selection—Concluding remarks | [385-405] |
| Index | [406] |