INDEX. ABBEVILLE, discoveries at, 199. Abbott, Dr. C. C., palæolithic implements discovered by, 203. Acceleration, law of, 46-48. Africans, eastern, morals of, 191. Agassiz, Professor Louis, on embryonic reminiscences, 114. Allen, Grant, on primitive man, 218, 220. Allen, J. A., on variation among birds, 20. Amblystoma, 44, 45. Ammonites, variation among, 149–155. Amœba, 105, 106. Ancon sheep, 15, 16. Animal kingdom, partial classification of, 243–245. possible remoteness of, 213-218. Ants, intelligence of, 184, 185. maintenance of, by acacias, 96. Apes, physical resemblances of, to man, 180-183. Archæopteryx, 135–137. Arietidæ, Professor Alpheus Hyatt on genesis of, 150-155. Australia, extinction of species in, 72-74. fauna of, 167. rabbit in, 73, 74. Axolotl, 43, 44, 45. BABBITT, Miss Franc. E., on palæolithic implements, 212. Baer, Von, on similarity of young embryos, 113, 114. Baker, Dr. Frank, on human maladaptations, 186. Bates, H. W., discoverer of mimicry among butterflies, 87. Belt, Mr., on tree-frogs, 85. on ants on acacias, 96. Birds, color changes in, 39. Blood-corpuscles of sea snails, 110. Boundaries of zoological regions, 162-164. Brain-development, history of, 173-176. Branchipus, 32-34. Brine-shrimps, 32-34. Schmankiewitsch on, 32-34. British Isles, fauna of, 168. Brontotherium, brain of, 174. Brown-Sequard, Prof., on inheritance of epilepsy by guinea- pigs, 48. Burton on morals of eastern Africans, 191. CANSTADT race, 214-218. Carboniferous age, life of, 128. Carpenter, Dr. W. B., on variation among the foraminifera, 21. Cat, crosses of, 49. length of intestine in, as related to food, 36. of Mombas, 34, 35. Cats of Paraguay, 35. Cave-animals, color, etc., of, 10. Prof. A. S. Packard on, 40. Chalk sponges, Haeckel on, 22. Chesapeake Bay compared to pre-historic Delaware Bay, 210. Classification of animal kingdom, partial, 243-245. vegetable kingdom, partial, 246. Claypole, Prof. E. W., on Croll's theory, 196. Clevenger, Dr. S. V., on disadvantages of the upright posi- tion, 188, 189. Climate, effect of, on fur, 35. Clover-leaf, sport in, 17, 18. Coccyx, an injurious aborted organ, 120. Codfish, rate of reproduction of, 59. Color-changes in birds, 39. Comprehensive types, 137-140. Conditions of life, changes produced by, 31-48. Connecticut River, terraces of, 198. Cope, Prof. Edward D., on man as a mammal, 175, 176. on acceleration and retardation, 46-48. Correlated variation, 54-56. Creation, Linnæus's views of, 5. Milton's views of, 6. special, inconceivable, 238. Creation-theory, and distribution, 172. Cresson, Hilborne T., on palæolithic implements. 212. Cultivation, effects of, on plants, 13, 14. Cycads, 141, 142. DALTON, on wild men of Borneo, 190. Dana, Prof. James D., on early life of the globe, 7. on geological time-ratios, 125. Danaidæ, 84, 85. Darwin, Charles, on coloration of fruits, 88, 89. announcement of principle of natural selection by, 229, 230. on early views of origin of species, 224. on destruction of birds by cold, 66. on effects of food on structure of animals, 36, 37. on black-shouldered peacock, 53. on Porto Santo rabbits, 60, 61. on destruction of beans by frost, 68. on law of succession of types, 144, 145. on struggle for existence, 58. on tuco-tuco, 41. position of, as an investigator, 230-234. Darwin, Erasmus, on origin of species, 226. on sexual selection, and struggle for existence, 231, 232. De Candolle, A., on oaks, 19. Decoy resemblances, 84. Deer, relation of, to wolves, 62, 63. Delaware Bay, condition of, at close of glacial period, 206-212. 203-212. Development theory, general acceptance of, 237–241. definition of, 8. Devonian age, life of, 128. Distribution, laws of, 166, 167. in relation to special-creation theory, 171, 172. Dog, crosses of, 49. origin of, 14. varieties of, 49. Domesticated animals running wild, 75. Domestication, variation of animals under, 15. Double flowers, 13. Doubtful species, 19. Dove, Mr., on Tasmanians, 191. EARTH's crust, age of, 123, 124. mammalian, 109-113. Egypt, permanence of species in, 4. Ehrenberg, failure of, to distinguish nature of volvox, 109. Embryos, similarity of all young, 111-114. Eohippus, 147-149. Eozoic age, life of, 125. Europe, extent of, during tertiary, 193, 194. testimony of vegetable kingdom to, 247-251. Eye, human, defects of, 187, 188. FERTILIZATION of flowers, 92-96. protective coloration among, 80. fertilization of, 92-96. Fly attacking quadrupeds of Paraguay, 64. Food, effect of, in producing variation, 35-39. Forests, alternation of, 65, 66. Four-handed, monkeys not, 181, 182. Fracture, zone of, 160. Fruits, coloration of, 88-89. Fur, effect of climate on, 35. GAR-PIKES, number of species of, 21. survival of, 138. Gastrula-stage of embryos, 111, 112. Genus, definition of, 3. Geological record, imperfection of, 156. Gilbert, G. K., on age of Niagara gorge, 196. Gill-arches, 118, 119. Glacial period, first, date of, 195, 196. Glacier, Greenland, 195. Glaciers of Europe in quaternary, 194, 195. of North America in quaternary, 194. Gray, Dr. Asa, on natural selection, 69. Guyot, Prof. Arnold, map of zone of fracture, 161. HAECKEL, Prof. Ernst H., contributions of, to the develop- |