INDEX 



Abiogenesis, 12 

 Abraxas, 438, 452 



Acquired characters, inheritance of, 19, 

 20, 273; discussion by E. G. Conklin, 

 33°~3^'>^ lack of evidence for, 332, 

 33S; 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, 196; 

 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, 45 1 



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, 26 



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 



Billen, R. H., 394 



Bimodal and multimodal curves, 368, 



369 

 Biometr}': discussion of, 365-75; rise 

 and vogue of, 38, 39 



Birds: rudimentary teeth of, 181; 

 wing of, 134 



Birgus lalro, 138, 139, 140 



Bison antiquus, 85 



Blakeslee, A. F., 417 



Blastoderm, 166 



Blastula, 166 



Blends, in heredity, 416-18 



Blood-transfusion tests, evidences from 



Oo, 124-2S 



Bonnet, R., 16 



515 



