INDEX 



Abiogenesis, 12 



Acquired characters: inheritance of, 19- 

 20, 401-25: discussion by E. G. Conk- 

 lin, 408-14; lack of evidence for, 410- 

 11; misunderstandings concerning, 

 401-8; other side of the question, 

 414-16; recent experiments appar- 

 ently favoring, 423-25; statement of 

 the problem, 401, 409-12 



Adaptation, n, 30, 344-45, 34Q-6 9 ; 

 . classification of adaptations, 354-56; 

 Osborn's laws of, 366-69 



Adaptive radiation, law of, 73-74, 270- 

 7i 



Agouti, 272 



Albinism, heredity of, 454 



Allen, E. J., 373 



Altenburg, 209, 336 



Amphioxus, 119 



Amphisbaenidae, 95 



Analogous, versus homologous struc- 

 tures, 56-57 



Analogy, principle of, 56-57; versus 

 homology, 56-57 



Anaphase of mitosis, 195 



Anaxagoras, 12 



Anaximander, 11 



Anaximenes, n-12 



Ancestral inheritance, Galton's law of, 



473 

 Angiostomum nigrovenosum, 225 



Anti-lens serum, Guyer's experiments 

 with, 416-23 



Apartness of the germ plasm, 31, 201, 

 414-16 



Aphids, 224 



Appendix vermiformis, in man and apes, 

 83-84 



Apotcttix, 297 



Apteryx australis, 71-72 



Aquinas, Thomas, 8, 15 



Aristotle, 13-14, 18 



Arithmetical mean, 558 



Armadillo quadruplets: and classifica- 

 tion, 98-99; and the fundamental 

 assumption about evolution, 54-55; 



611 



bearing of, on origin of human iden- 

 tical twins, 478-80; and sex-deter- 

 mination, 220-21 



Armadillos, 54-55, 160, 220-21, 478-80 



Artificial propagation, 198 



Artificial selection, 25-26 



Ascaris, germ tract in, 201-2 



Asexual reproduction, 197-99 



Aspergillus niger, 405 



Assortment, independent, 223, 273-74 



Atavism, 13 



Atropa, 245 



Augustine, 8, 15 



Autosomes, 223, 226-27, 286 



Azores, fauna of, 166 



Babcock, E. B., 222, 3S3-94, 561-72 



Bagg, H. J., 340, 424 



Bakewell, R., 305 



Balanoglossus, 1 18-19 



Bascanion anthonyi, 93 



Bat, wing of, 63 



Bateson, W., 7, 21, 43-46, 232, 248, 



253, 3i3, 469 

 Bathmism, 35 

 Bauer, E., 338, 413 



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

 25-26 



Beebe, W., 438 



Begonia, 415 



Belling, 233, 334 



Bembidium, 172 



Bergson, H., 34, 187, 428 



Bermudas, fauna of, 166-67 



Bibliography, 600-602 



Bimodal and multimodal curves, 554-55 



Biometry: discussion of, 555-60; rise 



and vogue of, 38-39; short lesson in, 



210-n 



Birds: rudimentary teeth of, 122; wing 

 of, 63 



Birgus latro, 67-68, 70 



Bison antiquus, 148 



Blakeslee, A. F., 257, 327, 334, 336 



