Roscoe, Sir H.--on artificial production of protoplasm, 62 Salamander, embryological features, 193 _Salix polaris_, its specific stability, 164, 222 Saporta, Comte de--on parallel development of animal and vegetable life, 228; on the problem of Creation, 268 Schoolmen, the--on relation of soul and body, 132 Scorpion, maternal and unfilial instincts, 122 Selous, Mr. E.--exemplifies Monistic doctrines, 139 n. Sensation and consciousness,--origin of, 67 Snakes, embryological features, 194 Species, on evolutionary principles must each derive from a single origin, 210; isolation of, 211; and genera, 244 n. Specific stability in Nature, 164 Spencer, Mr. Herbert--on the beginning of life, 56; his "Formula of Evolution," 145; on the process of organic evolution, 147 Spontaneous Generation. See _Life, origin of_ Stephen, Sir L.--on materialism, 78 Stewart, Prof. Balfour--on finite duration of the world, 1; on dissipation of energy, 25. See also _Stewart and Tait_ Stewart and Tait--on self-evidence of theism, 104, 273 Stirling, Mr.--on protoplasm, 59, 61 Stokes, Sir G. G.--on evidence for design, 104 Suarez--on creative power and natural law, 207 Substance, law of, 13, 14, 22, 23, 33, 41, 118 Survival of the fittest, and organic progression, 186 Tait, Prof. P.--On the scope of science, 18, 20; on force and energy, 23 n.; on the properties of matter, 39; on "pseudoscience," 40; on scientific methods, 47; on mechanical theories of life, 65. See also _Stewart and Tait_. Teleology--98 _seq._ Theism, 97 _seq._, 277 Thiselton-Dyer, Sir W.--on protoplasm, 60-62 _Thyroid_ gland--its lesson, 191 n. Time, as a factor in Evolution, 80, 169 Transformism, 142, etc. See _Evolution, organic_ _Triton alpestris_, 195 Tyndall, Prof.--on the material origin of life, 38; on the beginning of life, 46; on scientific method, 47; on spontaneous generation, 54-56; on the potentialities of matter, 54; on mind and matter, 133 Ungulates, structure of limbs, 241 Variation, the basis of Darwin's calculations, 162; its limitations, _ibid._; minute at each stage, 165 _Verbum mentale_, 76 Vines, Prof. S. H.--on speculations and facts, 185; on the present status of the Darwinian theory, 202; on our present knowledge, 237 Virchow, Prof.--on the beginning of life, 46; on spontaneous generation, 65 Vogt, Carl--on embryology, 194; on Haeckel's genealogies, 264 Wallace, Mr. A. R.--on breaches of natural causation, 64; on the origin of life, _ibid._; on the origin of animal life, 69, 70 Weismann, Prof.--on our intellectual need for causality, 101 Weldon, Prof.--on Huxley's scientific method, 21, 197 Whales, appearance of, 257 Whitney, Prof.--on origin of language, 79 Will, the only cause known to us, 99, 100. See also _Free-will_