INDEX 
Abiogenesis, 12 
Abraxas, 438, 452 
Acquired characters, inheritance of, 19, 
20, 273; discussion by E. G. Conklin, 
330-36; lack of evidence for, 332, 
333; misunderstandings concerning, 
323-30; other side of the question, 
336-38; statement of the problem, 
323, 331-32 
Adaptation, 11, 30, 188-205; classi- 
fication of adaptations, 195, 1096; 
Osborn’s laws of, 192-95 
Adaptive radiation, law of, 194, 195 
Agassiz, L., 144, 145 
Aggressive resemblance, 201 
Albinos, different kinds, of, 431, 432 
Allelomorphic, characters in heredity, 
433 
Allen, E. J., 209 
Alluring coloration, 201 
Ameghino, F., 86 
Amphioxus, 178 
Amphisbaenidae, 119 
Analogous, versus homologous struc- 
tures, 136 
Anaxagoras, 12 
Anaximander, 11 
Anaximenes, 11, 12 
Ancestral inheritance, Galton’s law of, 
371, 372 
Anti-lens serum, Guyer’s experiments 
with, 338-45 
Antirrhinum, 446 
Apartness of the germ plasm, 31, 295, 
296, 337 
Apotetix, 448 
Appendix vermiformis, in man and 
apes, 154, 155 
Apteryx australis, 142, 143 
Aquinas, Thomas, 8, 15 
Archaesthetism, 35 
Aristotle, 13, 14, 18 
Arithmetical mean, 367 
Armadillo quadruplets: and classifica- 
tion, 122, 123; and sex-determina- 
tion, 451 
Armadillos, 97 
Artificial selection, 25, 26 
Aspergillus niger, 327 
Atavism, 13 
Atropa, 393 
Augustine, 8, 15 
Azores, fauna of, 103 
Babcock, E. B., 287, 307-22, 363, 364, 
401-12 
Bacon, F,, 15, 276 
Balanoglossus, 177, 178 
Bascanion anthonyi, 117 
Bat, wing of, 134 
Bateson, W., 7, 43, 346, 368, 369, 380, 
393, 396, 414, 446 
Bathmism, 35 
Bauer, E., 335 
“Beagle,” Darwin’s voyage on the, 23, 
25, 20 
Beebe, W., 316, 317 
Beeton, M., 485, 489, 491 
Begonia, 337, 338 
Bell, A. G., 474, 491 
Bembidium, 109 
Bequerel, A. H., 275 
Bergson, H., 34 
Bermudas, fauna of, 103-5 
Bibliography, 510-13 
Biffen, R. H., 394 
Bioee and multimodal curves, 368, 
Biametry: discussion of, 365-75; rise 
and vogue of, 38, 39 
Birds: rudimentary teeth of, 
wing of, 134 
Birgus lairo, 138, 139, 140 
Bison antiquus, 85 
Blakeslee, A. F., 417 
Blastoderm, 166 
Blastula, 166 
Blends, in heredity, 416-18 
Blood-transfusion tests, evidences from 
60, 124-28 
Bonnet, R., 16 
181; 
515 
