INDEX 
Abraxas grossulariata, 94 
Acquired characters, transmission of, 16, 
22, 33, 90, 118, 139, 179, 180, 428, 429 
Acraea johnstoni, 290 
Adaptation, 19, 21, 26, 33-35, 45, 61-65, 
99, 100, 272-275 
Adloff, 133 
Adlumia cirrhosa, 388 
Agassiz, A., 369, 370 
Agassiz, L., 171, 174 
Alexander, 461 
Allen, C. A., 110? 
Alternation of generations, 106, 107, 217 
Ameghino, 131, 182, 136 
Ammon, O., Works of, 470 
Ammonites, Descent of, 197, 198 
Amphidesmus analis, 286 
Anaea divina, 53 
Andrews, C. W., 1941 
Angiosperms, evolution of, 205-212, 313- 
316 
Anglicus, Bartholomacus, 487 
Ankyroderma, 31 
Anomma, 35 
Antedon rosacea, 249 
Antennularia antennina, 262, 263 
Anthropops, 127 
Ants, modifications of, 34-36, 39 
Arber, E. A. N., 213, 214 
— and J. Parkin, on the origin of Angio- 
sperms, 221 
Archaeopteryx, 196 
Arctic regions, velocity of development of 
life in, 257 
Ardigo, 453, 454 
Argelander, 556, 560 
Argyll, Huxley and the Duke of, 488 
Aristotle, 5, 487, 490 
Arrhenius, 249 
Asterias, Loeb on hybridisation of, 249 
Autogamy, 415 
Avena fatua, 78 
Avenarius, 456 
Bacon, on mutability of species, 5, 6 
Baehr, von, on Cytology, 94 
Baer, law of von, 175 
Bain, 444 
Baldwin, J. M., 41, 428% 
Balfour, A. J., 490, 566 
Ball, J., 316} 
Barber, Mrs M. E., on Papilio nireus, 280 
Barclay, W., 5241 
Barratt, 461 
Bary, de, 226 
Bates, H. W., on Mimicry, 54, 58, 275, 
276, 286, 287, 290 
— Letters from Darwin to, 287, 288, 296 
— 484 
Bateson, A., 421 
Bateson, W., on Heredity and Variation 
in Modern lights, 85-101 
— on discontinuous evolution, 23, 238 
— on hybridisation, 242 
Bateson, W. and R. P. Gregory, 411! 
Bathmism, 13 
Beche, de la, 361, 362 
Beck, P., 498, 501, 509, 510 
Becquerel, H., 569 
Beebe, OC. W., on the plumage of birds, 280, 
281 
— on sexual selection, 297 
Beguyer de Chancourtois, 566 
Bell’s (Sir Charles) Anatomy of Expression, 
432 
Belopolsky, 560 
Belt, T., on Mimicry, 293 
Beneden, E. van, 103° 
Benson, M., 2197, 220 
Bentham, G., on Darwin’s species-theory, 
307 
— on geographical distribution, 298, 309 
Bentham, Jeremy, 461 
Bergson, H., 454, 498, 5052, 507? 
Berkeley, 448 
Berthelot, 480 
Betham, Sir W., 514 
Bickford, E., experiments on degeneration 
by, 40 
Bignonia capreolata, 390 
Biophores, 36, 37 
Birds, geological history of, 196 
Blanford, W. T., 322, 377 
Blaringhem, on wounding, 237, 244 
