INDEX 



Absorption, 145 

 Acacias guarded by ants, 29, 30 

 Acquired characters, 329-336 

 Actions, automatic, 155 



habitual, 155 



innate, 155 



intelligent, 155 

 Alternation of generations, 189 

 Amoeba, 213 

 Amphibians, 9, 256, 257 



parental care among, no, in 

 Amphioxus, 252 

 Angler-fish, 118 

 Animalculists, 191 

 Animals, everyday life of, 1-124 



domestic life of, 95. n6 



industries of, 117-124 



life-history of, 184-203 



past history of, 204-209 



social life of, 67-94 



and plants, resemblances and 

 contrasts, 167-171 



relation of simplest to more 

 complex, 171-174 

 Annelids, 231-234 

 Antlers, 279 

 Ants, 78-84 



and aphides, 119, 120 



and plants, 29 

 Aphides, 82, 312 



multiplication of, 38 

 Arachnida, 243 

 Archoplasm, 183 



Aristotle, 283, 284 

 Armour of animals, 34, 35 

 Artemia, 310, 311 

 Arthropods, 10, 238 

 Atavism, 322 

 Autotomy, 64"66 

 Axolotl, 309 



Backboned animals, 9, 222-247 

 Backboneless animals, 9, 10, 248- 



272 

 Bacteria, 21, 22 

 Balance of nature, 19-21 

 Balanoglossus, 9, 249, 250 

 Bathybius, 219 

 Beauty of animals, 15-17 

 Beavers, 25, 74, 75 

 Bees, 78-84 



Biology, justification of, 34-50 

 Birds, 9, 264-267 



parental care among, 114, 115 

 Blind animals, 305 

 Body, functions of, 144-149 



parts of, 174-183 

 Books, 351-369 

 Boring animals, 25 

 Bower birds, 98 

 Brachiopoda, 235 

 Brine-shrimp, 310, 311 

 Buffon, 286 



Caddis worms, 61 

 Carbohydrates, 134 



