INDEX. 



Abberant groups, 447. 

 Abyssinia, plants of, 401. 

 Acclimatization, 133. 

 Adoxa, 205. 

 Affinities of extinct species, 



of organic beings, 445. 



Agassiz, on Amblyopsis, 133. 

 , on groups of species 



356. 



sud- 



denly appearing, 343. 

 — , on prophetic forms, 357. 

 -, on embryological succession, 



366. 



— , on tlie Glacial period, 389. 

 — , on embryological charac- 

 ters, 434. 



on the latest tertiary forms. 



329. 



— , on parallelism of embryo- 

 logical development and geo- 

 logical succession, 466. 

 — , Alex., on pedicellarise, 226. 



Algse of New Zealand, 399, 



Alligators, males, fighting, 81. 



Alternate generations, 456. 



Amblyopsis, blind fish, 133. 



America, North, productions al- 

 lied to those of Europe, 393. 



' , , bowlders and glaciers 



of, 395. 



^ , South, no modern forma- 

 tions on west coast, 322. 



Ammonites, sudden extinction of, 

 351. 



Anagallis, sterility of, 279. 



Analogy of variations, 150. 



Andaman Islands inhabited by a 

 toad, 413. 



Ancylus, 407. 



Animals, not domesticated from 



being variable, 15. 

 , dome«tic, descended from 



several stocks, 16. 



acclimatization of, 134. 



Animals of Australia, 106. 



with thicker fur in cold cli- 

 mates, 127. 



, blind, in caves, 131. 



extinct, of Australia, 367. 



Anomma, 273. 



Antarctic islands, ancient flora of, 

 419. 



Antechinus, 440. 



Ants attending aphides, 245. 



, slave-making instinct, 255. 



, neuters, structure of, 272. 



Apes, not having acquired intel- 

 lectual powers, 214. 



Aphides, attended by ants, 245. 



Aphis, development of, 460. 



Apteryx, 166. 



Arab horses, 30. 



Aralo-Caspian Sea, 367. 



Archeopteryx, 335. 



Archiac, M. de, on the succession 

 of species, 353. 



Artichoke, Jerusalem, 135, 



Ascension, plants of, 410. 



Asclepias, pollen of, 180. 



Asparagus, 383. 



Aspicarpa, 433. 



Asses, striped, 152. 



, improved by selection, 86. 



Ateuchus, 129. 



Aucapitaine, on land-shells, 417. 



Audubon, on habits of frigate- 

 bird, 16©. 



