INDEX 



Abiogenesis, 12 



Abraxas, 415 



Acer, 494 



Acquired characters: inheritance of , 19- 

 20, 445-47; discussion by E. G. Conk- 

 lin, 456-62; lack of evidence for, 458- 

 59; misunderstandings concerning, 

 449-56; other side of the question, 

 462-64; recent experiments appar- 

 ently favoring, 464-74; statement of 

 the problem, 449, 457-6o 



Adaptation, 11, 30, 194-214; classifica- 

 tion of adaptations, 199-200; Osbom's 

 laws of, 211-14 



Adaptive radiation, law of, 81-2 



Agassiz, L., 213-14 



Albinos, different kinds of, 389-90 



AUelomorphic, characters in heredity, 

 345, 393 



Allen, E. J., 191 



Altenburg, 448 



Amphioxus, 127 



Amphisbaenidae, 103 



Analogous, versus homologous struc- 

 tures, 64-65 



Analogy, principle of, 64-65; versus 

 homology, 64-65 



Anaxagoras, 12 



Anaximander, 11 



Anaximenes, 11-12 



Ancestral inheritance, Galton's law of, 

 436-37 



Angioslomum nigrovenosum, 402 



Anti-evolution campaign, 45-46 



Anti-lens serum, Guyer's experiments 

 with, 464-72 



Apartness of the germ plasm, 31, 308, 



463, 464 • 

 Aphids, 401 



Appendix vermiformis, in man and apes, 



91-92 

 Apleryx aiislralis, 79-So 

 Aquinas, Thomas, 8, 15 

 Aristotle, 13-14, 18 



Arithmetical mean, 432 



Armadillo quadruplets: and classifica- 

 tion, 106-7; and the fundamental 

 assumption about evolution, 62-63; 

 and the relative potency of heredity 

 and environment, 536-38; and sex- 

 determination, 397-98 



Armadillos, 62-63, 16S 



Artificial selection, 25-26 



Asexual reproduction, 300 



Aspergillus nigcr, 453 



Assortment, independent, 392-93 



Atavism, 13 



Atropa, 352 



Augustine, 8, 15 



Autosomes, 400, 403-4 



Azores, fauna of, 174 



Babcock, E. B., 295, 323-38, 383-94, 399 



Bacon, F., 15, 285 



Bagg, H. J., 472, 503 



Bakewell, R., 511 



Balanoglossus, 126-27 



Bascanion antlionyi, loi 



Bat, wing of, 71 



Bateson, W., 7, 21, 43-46, 339, 355, 372, 



434-35, 475 

 Bathmism, 35 

 Bauer, E., 500 

 "Beagle," Darwin's voyage on the, 23, 



25-26 



Beebe, W., 332-33 



Beeton, ]\I., 462, 468 



Begonia, 463 



Bell, A. G., 464, 471, 473 



Bellamy, A. W., 427 



Belling, 496 



Bembidium, 180 



Bequerel, A. H., 284 



Bergson, H., 34 



Bermudas, fauna of, 174-76 



Bibliography, 594-96 



Bimodal and multimodal curves, 434-35 



607 



