Death-bed of Mrs. Erasmus Darwin, 178 Deed, illustration drawn from a very intricate, 28 Definite, with Lamarck the variations are, 341, 344 _Degenerations_, 87 Demand and supply, like power and desire, 222, 300 Demonstrative case, "this demonstrative case of neuter insects, &c.," 249, 298, 314 Descent, with modification, spoken of as though synonymous with natural selection, 248, 356 Design, and organism, shall we or shall we not connect these ideas? 2 ---- Aristotle denied, Plato upheld, Haeckel on, 4 ---- Prof. Clifford's denial of, 6, 7 ---- does certainly involve a designer who has an organism, who can think, and make mistakes, 6, 24 ---- a belief in both design and evolution, commonly held to be incompatible, 9 ---- Sir W. Thomson and Sir J. Herschel on, 11 ---- Paley on, 12, &c. ---- light thrown by embryology on the method of, 25 ---- G. H. Lewes opposes, 26 ---- the three positions in respect to, taken by Charles Darwin, Paley, and the earlier evolutionists, 31 ---- the first evolutionists did not see that their view of evolution involved design, 34 ---- from within as much design as from without, 36 ---- was equivalent to theological design, with the early evolutionists, 36 ---- if each step is taken designedly, the whole is done designedly, 52, 384 ---- and accident, the line between them hard to draw; shaking the bag, &c., 53, 384 ---- instinct originated in, 54 ---- as much lost sight of with old-established forms of the steam-engine as with birds' nests or the wheel, 55 ---- Dr. E. Darwin's failure to see that evolution involves design, 195 ---- we feel the want of, as much as we do of evolution, 407 ---- evolution not only tolerates, but cannot get on without, 408 Designer, "I believe in an organic and tangible designer of every complex structure," 6 ---- "where is he? show him to us," &c., 29, 30 ---- the, of any organism, the organism itself, 30, 31, 40 Desire and power, interaction of, 44, 45, 47, 127, 217, 221, 300, 322 ---- and power, like wealth, 222 ---- as a means of modification, Dr. Erasmus Darwin on, 226, 228, 259 Development, the history of organic, the history of a moral struggle, 45 ---- always due to making the best of the present, 50 Devils, 20,000, dancing a saraband on the point of a needle, 216 Dew drop, or lens, the, and Lord Rosse's telescope, 44, 47 Diaphragm, Buffon on the, 129 Dice, accidental variations thrown for as with, 3 Difference between animal and ordinary mechanism, 24 ---- the main, between the manufacture of tools and that of organs, 39 Dilemma, C. Darwin's, 346 Direct action of changed conditions, Buffon on the, 105, 145, 147, 160 Discontinuity in continuity, 47 Disease, accidents followed by, 303 Disintegration, Protestantism tends towards, 397 Distribution, geographical, changed, Buffon on, 145, 164 Disuse, and the winglessness of Madeira beetles, we are almost surprised to find that they are connected at all, 375