Constancy of characters not necessarily due to Natural Selection, 186. _Contemporary Review_, referred to, 60, 65, 95 Continuity of germ-plasm, 44, 61, 133; absolute and relative, 134, 155. _Contributions to the Theory of Natural Selection_, referred to, 2; quoted, 180. COPE, Prof., referred to, 14, 15, 20, 63, 256; quoted, 16. Correlation, 171, 184, 211, 222, 268. COSTA, M., quoted, 217. CUNNINGHAM, Mr. J. T., quoted, 103; referred to, 95, 122. D. DALL, Prof., referred to, 14. DARWIN, Charles, referred to, 1-13, 20-22, 25, 44, 45, 51-53, 56, 66, 67, 74, 87, 88, 93, 95, 96-100, 149, 159, 160, 167, 173, 174, 181-183, 187-191, 193, 195, 198, 200-202, 213-216, 218, 219, 226, 256, 261-265, 268, 271, 277, 283, 287, 291, 305-307, 313-332, 337; quoted, 11, 53, 66, 96, 181, 182, 186-191, 193, 195, 201, 202, 213-215, 261, 262, 265, 313-316, 319-322, 324-326, 328-331, 337. _Darwin et ses Précurseurs Français_, referred to, 234. _Darwinian Theory of the Origin of Species_, quoted, 254. _Darwinism_, quoted, 22, 27, 67, 181, 182, 186, 189-191, 221, 222, 235, 236, 252, 253, 269, 270, 273, 313, 316; referred to, 7, 12, 15, 20, 70. DE CANDOLLE, Prof., referred to, 206. Deep-sea faunas, 212. DELBŒUF, referred to, 224. _Descent of Man_, quoted, 25, 322-324, 331. _Development of the Hard Parts of the Mammalia_, referred to, 14. DE VRIES, Prof., referred to, 122, 174. Diagnostic characters of birds, 176; Marsupials, 178. Divergent Evolution through Cumulative Segregation, quoted, 224. DIXON, Mr. Charles, referred to, 174; quoted, 177, 223. _Doctrine of Descent and Darwinism_, quoted, 260. Dogs, scratching, reflex of, 80; shaking off water, 84; transplantation of ovaries, 143. DORFMEISTER, Dr., referred to, 211. Ducks, use-inheritance in, 96; losing true plumage, 187. DUPUY, Dr., referred to, 105. DYER, Mr. Thistleton, quoted, 325, 327. E. _Effect of External Influences upon Development_, referred to, 66, 95. _Effects of Use and Disuse_, quoted, 50. EIMER, Prof., referred to, 14, 174, 217. _Entomological Society, Trans. of_, quoted, 211; referred to, 217. Epilepsy of guinea-pigs, 104. _Essays on Heredity_, quoted, 56, 91, 97, 107, 152; referred to, 12, 36, 65, 105, 110. EUDES-DESLONGCHAMPS, M., referred to, 188. European and American trees, compared, 201. EVEREST, Rev. E., quoted, 213. _Evolution without Natural Selection_, quoted, 177. _Examination of Weismannism_, referred to, 39-42, 44, 100, 122, 123, 134, 136, 138-140, 156. _Experiments in Pangenesis_, referred to, 145. F. FABRE, M., referred to, 88. Factors of organic evolution: Natural Selection, 2, 5, 6; use-inheritance, 3, 11. _Factors of Organic Evolution_, referred to, 8. Faculties and organs, 29. Fertility, 229. Flat-fish, Mr. Cunningham on, 103. _Floral Structures_, referred to, 19. FOCKE, Dr., referred to, 174. _Fonctions du Cerveau_, referred to, 109. Food, influence of, 217. Foot, of man, 23. Frog, brainless, balancing of, 78.