Antibodies, 14, 15 Antigen, 15 Antirrhinum, majus and molle, 88 Anti-vivisectionists, 236 Ants, 261, 262; leaf-cutting, 261 Ape, 245, 270, 272, 275, 285, 308, 309, 311, 314, 315, 316, 317, 345; anthropoid, 270, 271, 272, 275, 309, 315, 317; cranial capacity, 314; descended from man-like ancestor, 285; descent from, not a doctrine of science, 345; embryonic skull of, 285; foot of, 50, 51 —a hand functionally but not structurally, 50, 51; fossil, 308, 313; giant, geneological tree of, 315; higher, 311; its cranium, 271; large, 315; living, 308 Ape-like features, acquired adaptation, 330 Appalachians, 107 Appetite, 221, 235, 241; rational, 221; sensual, 235, 241 Appendicitis, 295 Appendix, vermiform, 295, 296; useful, 296 Apple-tree, 6, 88, 161 Apterix, 305 Arbacia punctulata, 159 Arboreal life, 271, 308 Arca, 118 Archæan, 104, 117; record, damaged condition of, 117 Archæology, prehistoric, 339 Archæopteryx, 86 Archæozoic, 104, 148; times alleged to have been more favorable to origin of life, 148 Argument, 226; no avail against fact, 226 Art, palæolithic, 340 Artefacts, 154 Artemia salina, 159 Artemisia absynthium, 248 Arthropoda, 61, 119, 261, 284 Artificial illumination, 340 Artistic attainment, high level of, 340 Artists, palæolithic, 335 Asia, 335 Ass, 5, 81, 304 Assimilation, 143 Association, 208, 235, 241, 242 Associationists, 208, 236 Astarte, 118 Asteroidea, 121, 122 Atavism, 303, 304 Atlantis, 114 Atmosphere, 148, 181, 183; coronal of sun, 183; formerly richer in carbon dioxide, 148; of earth, 183 Atoms, 58, 144, 162, 165, 167, 170, 202; structure of, 58 Atrophy, 285, 286, 288, 294, 299, 301, 302, 307; due to misuse, 288; somatic, 307 Attention, 208 Audist, 219 Aurignacian Man, 332 Aurora borealis, 183, 183 _note_, 184 _note_ Australian, 321, 325, 328, 330, 333; blacks, 325, 333 —modern, have brow ridges, 328; modern, 325, 330; skull of, 321 Author of Nature, 193 Autogamy, 158, 159, 161 Automatisms, 238, 240, 262; teleological, 240 Automixis, 161 Autonomy, 174, 202; dynamic, 174; vital, 202 Axiom, 223, 224; of reception, 223, 224 Axon, 213 Azoic bottom, 125 Babylonia, 337 Bacteria, 135, 138, 183, 183 _note_ Barbarism, 337; historically a state of degeneration and stagnation, 337; not a primitive condition, 337; no instance of spontaneous emergence from, 337 Bacteriologists, 183 Baltic Sea, 104, 105 Banana, 162 Basichromatin, 139 Bear Grass quarries, 106 Beaver, 247, 257 Bedding plane, 106 Bees, 257