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Chapter I - The Evidence of the Descent of Man from some Lower Form
Chapter II - On the Manner of Development of Man from some Lower Form
Chapter III - Comparison of the Mental Powers of Man and the Lower Animals
Chapter IV - Comparison of the Mental Powers of Man and the Lower Animals (continued)
Chapter V - On the Development of the Intellectual and Moral Faculties
Chapter VI - On the Affinities and Genealogy of Man
Chapter VII - On the Races of Man
Chapter IX - Secondary Sexual Characters in the Lower Classes of the Animal Kingdom
Chapter X - Secondary Sexual Characters of Insects
Chapter XI - Insects, Continued- Order Lepidoptera. Butterflies and Moths
Chapter XII - Secondary Sexual Characters of Fishes, Amphibians,and Reptiles
Chapter XIII - Secondary Sexual Characters of Birds
Chapter XIV - Birds- Continued
Chapter XVII - Secondary Sexual Characters of Mammals
Chapter XVIII - Secondary Sexual Characters of Mammals- Continued
Part Three - Chapter XIX - Secondary Sexual Characters of Man
Chapter XX - Secondary Sexual Characters of Man- Continued
Chapter XXI - General Summary and Conclusion
Supplemental Note - On sexual Selection in Relation to Monkeys