INDEX. 



Aberrant groups, 419. 



Abyssinia, plants of, 373. 



Acclimatization, 125. 



Adoxa, 193. 



Affinities of extinct species, 334. 



of organic beings, 414. 

 Agassiz, on Ainblyopsis, 125. 

 on groups of species suddenly 



appearing, 325. 

 on prophetic forms, 335. 

 on embryological succession, 344. 

 on the glacial period, 266. 

 on embryological characters, 408. 

 on the latest tertiary forms, 309. 

 on parallelism of embryological 

 development and geological 

 succession, 43S. 

 Agassiz, Alex,, on pedicellariae, 213. 

 Algae of New Zealand, 374. 

 Alligators, males, fighting, 77. 

 Alternate generations, 428. 

 Amblyopsis, blind fish, 125. 

 America, North, productions allied 

 to those of Europe, 370. 

 bowlders and glaciers of, 366. 

 America, South, no modern forma- 

 tions on west coast, 311. 

 Ammonites, sudden extinction of, 



329. 

 Anagallis, sterility of, 262. 

 Analogy of variations, 142. 

 Andaman Islands inhabited by a 



toad, 388. 

 Ancylus, 382. 



Animals, not domesticated from 

 being variable, 15. 

 domestic, descended from several 



stocks, 16. 

 domestic, acclimatization of, 126. 

 Animals of Australia, 99. 

 with thicker fur in cold climates, 



120. 

 blind, in caves, 123. 

 extinct, *»f Vustralia, 346. 



Anomma, 260. 



Antarctic islands, ancient flora oi. 



393. 

 Antechinus, 410. 

 Ants attending aphides, 229. 



slave-making instinct, 239. 



neuters, structure of, 255. 

 Apes, not having acquired intellec 



tual powers, 201. 

 Aphides, attended by ants, 229. 

 Aphis, development of, 431. 

 Apteryx, 157. 

 Arab horses, 29. 

 Aralo-Cas- ian Sea, 345. 

 Archeopteryx, 315. 

 Archiac, M. de, on the succession 



of species, 332. 

 Artichoke, Jerusalem, 127. 

 Ascension, plants of, 385. 

 Asclepias, pollen of, 169. 

 Asparagus, 360. 

 Aspicarpa, 407. 

 Asses, striped, 143. 



improved by selection, 34. 

 Ateuchus, 122. 



Aucapitaine, on land-shells, 391. 

 Audubon, on habits of frigate-bird, 

 159. 



on variation in birds' nests, 230. 



on heron eating seeds, 383. 

 Australia, animals of, 99. 



dogs of, 233. 



extinct animals of, 346. 



European plants in, 374. 



glaciers of,- 371. 

 Azara, on flies destroying cattle, 63. 

 Azores, flora of, 364. 



Babington.Mr..on British plants, 42. 

 Baer, Von, standard of highness, 

 110. 

 comparison of bee and fish, 342. 

 embryonic similarity of the Vej> 

 tebrata, 429, 



I 



