The Brain of the Savage shown to be Larger than he Needs it to be Size of Brain an important Element of Mental Power Comparison of the Brains of Man and of Anthropoid Apes Range of intellectual power in Man Intellect of Savages and of Animals compared The use of the Hairy Covering of Mammalia The Constant absence of Hair from certain parts of Man's body a remarkable Phenomenon Savage Man feels the want of this Hairy Covering Man's Naked Skin could not have been produced by Natural Selection Feet and Hands of Man considered as Difficulties on the Theory of Natural Selection The Origin of Some of Man's Mental Faculties, by the preservation of Useful Variations, not possible Difficulty as to the Origin of the Moral Sense Summary of the Argument as to the Insufficiency of Natural Selection to account for the Development of Man The Origin of Consciousness The Nature of Matter Matter is Force All Force is probably Will-force Conclusion I. ON THE LAW WHICH HAS REGULATED THE INTRODUCTION OF NEW SPECIES.[A] +--------------------------------------------------------------+ | [A] Written at Sarawak in February, 1855, and published in | | the "Annals and Magazine of Natural History," September, | | 1855. | +--------------------------------------------------------------+ _Geographical Distribution dependent on Geologic Changes._ Every naturalist who has directed his attention to the subject of the geographical distribution of animals and plants, must have been interested in the singular facts which it presents. Many of these facts are quite different from what would have been anticipated, and have hitherto been considered as highly curious, but quite inexplicable. None of the explanations attempted from the time of Linnaeus are now considered at all satisfactory; none of them have given a cause sufficient to account for the facts known at the time, or comprehensive enough to include all the new facts which have since been, and are daily being added. Of late years, however, a great light has been thrown upon the subject by geological investigations, which have shown that the present state of the earth and of the organisms now inhabiting it, is but the last stage of a long and uninterrupted series of changes which it has undergone, and consequently, that to endeavour to explain and account for its present condition without any reference to those changes (as has frequently been done) must lead to very imperfect and erroneous conclusions.