INDEX 



PAGE 



Abreu, Madame, observations of behaviour of apes by 303, 308-309 



Abyssinia, butterflies from 184 



Adaptive radiation, dejfinitions of 157, 330 



Africa, ant from, figure showing 221 



butterflies of 184 



elephants of 238 



Africa, South, Permian climate of 285 



Agassiz, Louis, cited 69, 102, 103 



Alaska, former connection of, with Siberia 86, 91-92, 227-229, 230 



remains of horses found in 230 



Alga, figures showing 146 



Allantois, advantages of evolution of 331 



Allen, Joel A., cited 1 



Amauris niavius, figure showing 184 



Amazon region, butterflies of 180 



Amnion, advantages of evolution of 331 



Amoeba, nature of 145 



studies of evolutionary changes in 26-33 



views of 27 



Amphibia, features and habits of 259, 279-280 



origin of 278-281 



Amphioxus, reference to 274, 332 



Ancestral features of embryo, discrimination of 70-71 



Anchitherium, geological age of 226 



Andrews, Roy C, cited 287 



Animals, development of structure of 124-127 



domestic breeding of, significance of 112 



earliest known 257 



evolutionary increase in size and efficiency of 328-332 



expressions of emotions of 295 



geographic distribution of 81-101 



Ant, figure showing Tertiary form of 215 



vestigial wings of - 35, 36 



Ants, colony of, figure showing 218 



distribution of 217-218 



diversity in form and habits of 218-219 



evolution of, chapter on 210-224 



feeding habits of 219 



figures showing 215, 217-222 



fossil, study of 214-216 



fungus chamber of, figure showing 219 



habits of 217-218 



[373] 



