The Descent of Man, and Selection in Relation to Sex. Charles Darwin

GENEALOGY OF MAN.

       —CONCLUSION—

       CHAPTER VII. — ON THE RACES OF MAN.

       ON THE EXTINCTION OF THE RACES OF MAN.

       ON THE FORMATION OF THE RACES OF MAN.

       PART II. SEXUAL SELECTION.

       CHAPTER VIII. — PRINCIPLES OF SEXUAL SELECTION.

       NUMERICAL PROPORTION OF THE TWO SEXES.

       POLYGAMY.

       THE MALE GENERALLY MORE MODIFIED THAN THE FEMALE.

       LAWS OF INHERITANCE.

       INHERITANCE AT CORRESPONDING PERIODS OF LIFE.

       INHERITANCE AT CORRESPONDING SEASONS OF THE YEAR.

       A SUMMARY AND CONCLUDING REMARKS.

       MAN.

       HORSES.

       DOGS.

       SHEEP.

       BIRDS.

       FISH.

       INSECTS.

       THE PROPORTION OF THE SEXES IN RELATION TO NATURAL SELECTION.

       CHAPTER IX. — SECONDARY SEXUAL CHARACTERS IN THE LOWER CLASSES OF THE ANIMAL KINGDOM.

       THE SUB-KINGDOM OF THE MOLLUSCA.

       SUB-KINGDOM OF THE VERMES: CLASS, ANNELIDA (OR SEA-WORMS) .

       SUB-KINGDOM OF THE ARTHROPODA: CLASS, CRUSTACEA.

       CLASS, ARACHNIDA (SPIDERS) .

       CLASS, MYRIAPODA.

       CHAPTER X. — SECONDARY SEXUAL CHARACTERS OF INSECTS.

       DIFFERENCE IN SIZE BETWEEN THE SEXES.

       ORDER, THYSANURA.

       ORDER, DIPTERA (FLIES) .

       ORDER, HEMIPTERA (FIELD-BUGS) .

       ORDER: HOMOPTERA.

       ORDER, ORTHOPTERA (CRICKETS AND GRASSHOPPERS) .

       ORDER, NEUROPTERA.

       ORDER, HYMENOPTERA.

       ORDER, COLEOPTERA (BEETLES) .

       LAW OF BATTLE.

       STRIDULATING ORGANS.

       CHAPTER XI. — INSECTS, continued.

       ORDER LEPIDOPTERA. (BUTTERFLIES AND MOTHS.)

       DISPLAY.

       MIMICRY.

       BRIGHT COLOURS OF CATERPILLARS.

       A SUMMARY AND CONCLUDING REMARKS ON INSECTS.

       CHAPTER XII. — SECONDARY SEXUAL CHARACTERS OF FISHES, AMPHIBIANS, AND REPTILES.

       AMPHIBIANS.

       URODELA.

       ANURA OR BATRACHIA.

       REPTILES.

       CHELONIA.

       CROCODILIA.

       OPHIDIA.

       LACERTILIA.

       CHAPTER XIII. — SECONDARY SEXUAL CHARACTERS OF BIRDS.

       LAW OF BATTLE.