( 491 ) 



INDEX. 



ABERRANT. 



BEES. 



A. 



Ants, neuter, structure of, 236. 



Aphides attended by ants, 211. 



Aberrant groups, 429. 



Aphis, development of, 442. 



Abyssinia, plants of, 375. 



Apteryx, 182. 



Acclimatisation, 139. 



Arab horses, 35. 



Affinities of extinct species, 329. 



Aralo-Caspian Sea, 339. 



of organic beings, 411. 



Archiac, M. de, on the succession of 



Agassiz on Amblyopsis, 139. 



species, 325. 



on groups of species suddenly 



Artichoke, Jerusalem, 142. 



appearing, 302, 305. 



Ascension, plants of, 389. 



on embryological succession, 338. 



Asclepias, pollen of, 193. 



on the glacial period, 366. 



Asparagus, 359. 



on embryological characters, 418. 



Aspicarpa, 417. 



on the embryos of vertebrata, 



Asses, striped, 163. 



439. 



Ateuchus, 135. 



on parallelism of embryological 



Audubon on habits of frigate-bird, 185. 



development and geological succes- 



on variation in birds'-nests, 212. 



sion, 449. 



on heron eating seeds, 387. 



Algae of New Zealand, 376. 



Australia, animals of, 116. 



Alligators, males, fighting, 88. 



, dogs of, 215. 



Amblyopsis, blind fish, 139. 



, extinct animals of, 339. 



America, North, productions allied to 



, European plants in, 375. 



those of Europe, 371. 



Azara on flies destroying cattle, 72. 



— — — , boulders and glaciers of, 



373. 

 , South, no modern formations on 



Azores, flora of, 363. 



B. 



west coast, 290. 



Ammonites, sudden extinction of, 321. 



Babington, Mr., on British plants, 48. 



Anagallis, sterility of, 247. 



Balancement of growth, 147. 



Analogy of variations, 159. 



Bamboo with hooks, 197. 



Ancylus, 386. 



Barberry, flowers of, 98. 



Animals, not domesticated from being- 



Barrande, M., on Silurian colonies, 



variable, 17. 



313. 



, domestic, descended from several 



on the succession of species, 325. 



stocks, 19. 



on parallelism of palaeozoic forma- 





tions, 328. 





of Australia, 116. 



on affinities of ancient species, 



with thicker fur in cold climates, 



330. 



133. 



Barriers, importance of, 347. 



, blind, in caves, 137. 



Batrachians on islands, 393. 



, extinct, of Australia, 339. 



Bats, how structure acquired, 180. 



Anomma, 240. 



, distribution of, 394. 



Antarctic islands, ancient flora of, 399. 



Bear, catching water-insects, 184. 



Antirrhinum, 161. 



Bee, sting of, 202. 



Ants attending aphides, 211. 



, queen, killing rivals, 202. 



, slave-making instinct, 219. 



Bees fertilising flowers, 73. 



