INDEX 



Abomasum, 421 



Aboral surface, 222 



Absorption, 7, 120 



Abysmal fauna, 330 



Acephala, 206, 309 



Acorn-tongue worm, 306 



Acquired characters, 187 



Aftershaft, 369 



Agassiz, Alexander, 281 



Agassiz, Louis, 448 



Age, of Amphibians, 350; of Coal 

 Plants, 349 ; of Fishes, 331 ; of In- 

 vertebrates, 301 ; of Mammals, 433 ; 

 of Man, 435; of Reptiles, 365; of 

 Science, 449 



Aggressive resemblance, 23, 424 



Agramonte, 102 



Aigrets, 383 



Air bladder, 314 



Air sacs, 8 



Albatross, 380 



Albinism, 411 



Alligators, 354, 364 



Alluring coloration, 23 



Alternation of generations, 272 



Amber, 114 



Ambulacral groove, 222 



Ambystoma, 345 



American Museum of Natural His- 

 tory, 433, 447 



Amoeba, 289-291, 293, 297 



Amoebocytes, 243 



Amoebulae, 297 



Amphibia, 310, 344 ; Age of, 350 



Amphioxus, 304, 309 



Ampulla, 224 



Anabolism, 124 



Anatomy, 441 



Anemone, 275 



Animal kingdom, 109 



Annelida, 251, 255, 308 



Annulus, 154 



Anseres, 382 



Ant, cornfield, 33, 91 



Anteater, spiny, 412 



Antelopes, 418, 419, 420, 433 



Antennae, 2, 146 



Antennules, 146 



Anthozoa, 279, 308 



Antitoxin, 431 



Antlers, 419 



Ants, 89 ; agricultural, 92 ; cornfield, 



33, 90-91 ; honey, 92 ; slave-making, 



92 ; white, 110 

 Anura, 347 

 Apes, 427 



Aphids, 33, 99, 184 ; corn-root, 33, 91 

 Appendages, 2 

 Appendix, vermiform, 408 

 Arachnida, 144, 301, 309 

 Archaean Era, 300 

 Archaeopteryx, 401 

 Aristotle, 442 

 Armadillos, 415 

 Arms of starfish, 221 

 Arthropoda, 157, 171, 309 

 Artificial selection, 173-174 



Asexual reproduction, 127, 262, 270 



Assimilation, 120 



Asteroidea, 308 



Atoll, 281 



Atrium, 304 



Audubon, J. J.-, 447 



Auricles, 194, 206, 313, 334, 352, 354 



Australian realm, 116 



Aves, 310, 377 



Axolotl, 345 



Back swimmer, 41 



Bacon, Roger, 445 



Balancers, 69 



Balancing organs, 146, 274 



Balanoglossus, 306 



Baleen, 417 



Barbels, 323 



Barbs, 369 



Barbules, 369 



Barnacles, 166 



Barrier, 114, 401 



Basipodite, 150 



Basket stars, 231 



Bats, 427 ; vampire, 427 



Beaks, sucking, 30 



Bears, 424 



Beavers, 422, 423 



Beebread, 83 



Bees, bumble, 86; carpenter, 89; 



guest, 86; honey, 83; leaf-cutter, 



89; solitary, 89 



453 



