INDEX 



abdomen, of grasshopper, 2, 5 



of crustaceans, 84-88, 91 

 Acridiidae, 18, 19 

 adductors, 98 

 adrenalin, 281 

 adrenals, 281 

 air bladder, 160, 167, 168 

 air cells, 273 

 air sacs, 188 

 albinos, 372, 376, 377 

 alcohol, how made, 237, 238 



effect on digestion, 257, 258 

 on heart and circulation, 268 

 on kidneys, 279 



general effects, 311-314 



hereditary effects of, 383-384 

 alimentary canal, of bee, 58 



of bird, 187 



of crayfish, 86, 87 



of grasshopper, 6, 7 



of man, 249-251 

 alligators, 176, 180 

 alternation of generations, 135 

 Amazon ant, 68 

 Amia, 161, 167, 338 

 ammonites, 105 

 Amoeba, 146, 147, 151, 240, 241, 



33i 



Amphibians, 157, 169-175 

 Amphioxus, 155, 156, 337 

 amphipods, 94 

 amylopsin, 251 

 anaconda, 179 

 anal fin, 158 



analogous organs, 343 

 Ancon sheep, 356, 372 

 anemones, 130, 1-36 

 Anguilla, 163 

 Annelida, 114 

 Anopheles, 47 

 ant eater, 214, 215 

 Ants, 36, 56, 65-69 

 antelopes, 222 

 antenna cleaner, 58 

 antennae, 3, 68 

 anthropoids, 227 

 antitoxins, 326 

 antlers', 221, 222 

 Anura, 169-175 

 anvil, 310 

 aorta, 263 



arches of, 347 

 apes, 227, 230 

 aphids, 35, 36, 68 

 aqueous humor, 307 

 Arachnida, 18, 76-83 

 Archseopteryx, 350, 351 

 Argentine ant, 69 

 Armadillo, 214, 215 

 arteries, 88, 100, 262-265, 267 

 artificial selection, 356-359 

 Artiodactyla, 220 

 Ascaris lumbricoides, 122 

 Ascaris megatocephala, 122 

 Asellus, 93 

 assassin bugs, 32 

 assimilation, 239, 252 

 asteroids, 108-110 

 astigmatism, 308 

 atavism, 370 



389 



