"Darwin's view that the original ancestor of the Equidæ was a dun-coloured animal, striped all over, was based, not merely on the occurrence of stripes in horses, but on his belief that such stripes were common in dun horses, and that there was a tendency in horses to revert to dun colour. But it must be confessed that the facts do not warrant his conclusion.... It is clear that stripes are at least as often a concomitant of dark as of dun colour. Moreover, if Darwin's hypothesis of a dun-coloured ancestor with stripes is sound, dark colours such as bay and brown must be of more recent origin, and accordingly there ought to be a great readiness on the part of a progeny of a light-coloured animal when mated with a dark to revert to the light. But Professor Ewart's zebra stallion has never been able to stamp his own peculiar pattern or his own colours on his hybrid offspring. The ground colour has been determined by the dams of the hybrids." INDEX _Abiogenesis_, 49-51 _Ætiology_, 197 Agnosticism, Huxley's first principle of, 4 Its fundamental principle unreasonable, 272 American Museum and the pedigree of the Horse, 248 Amphibians, embryology, 195 "Anthropomorphism," 274, 275 _Archæopteryx_, 171 _Archebiosis_, 53 Argus pheasant, ornamentation, 175 _Arsinoetherium_, 267 Atlantic cable, an illustration from, of chance and purpose, 115 Atoms, 37, 41, 88, 89, 90, 136 Augustine, St.--on creation _causaliter et seminaliter_, 141, 207 _Axolotl_, 195 Baden-Powell, Prof.--on the nature of the First Cause, 276 Bastian, Dr. H. C.--on spontaneous generation, 21, 50, 53 _Bathybius Haeckelii_, 21 Batrachians, appearance of, 225 Bats, an evolutionary puzzle, 229, 257 Bee, cell-making instinct, 156, 179 Bickerton, Prof.,--on dissipation of energy, 27 n. _Biogenesis_, 49, 50 Blanchard, M.--on variation, 164; on Darwinian argumentation, 181; on fecundity as a factor in survival, 188; on the problem of creation, 268 Bolingbroke, Viscount,--on the nature of the first cause, 273 Bridgman, Laura, 77 Bunsen, Chevalier,--on animal sounds and language, 74 Butler, Bishop,--on intelligence as a factor in cosmogony, 100 Carruthers, Mr. W.--on specific stability of _Salix polaris_, 164; on classification of plants, 214; on the geological record, 216, 265; on past history of plant-life, 216 _seq._; on an assertion of Haeckel's, 221; on the evidence supplied by fossil plants, 223 Case, Prof.--on the meaning of "fortuitous," 125 Causation, principle of, 2, 87, 94, 107 Cause, the First. See _First Cause_ Chance, 110 _seq._, 151, 174 Cicero--on the evidence for a Deity, 103 Clerk-Maxwell, Prof.--on force and energy, 23n; on Molecules, 90, 104; on evidence of design, _ibid._ Clifford, Prof. W. K.--on design in Nature, 101 Clodd, Mr. E.--on atoms, 41 Comte, Auguste--on materialism, 278 Consciousness, origin of, 67