INDEX. 



Abbreviation of embryological 

 history, 131 



Aborted organs, 80 



Absence of generalized forms, 99 



Abstract ideas, 311 



Accelerated development, 265 



Activity as a modifying cause, 

 262 



Agassiz and classification, 55 



Agassiz, A., work on embryol- 

 ogy, 124 



Age of the world, 97, 215 



Air-bladder of fishes and lungs, 

 83, 84 



American birds, change in color, 

 25 



Amoeba, 270 



Amphioxus, 64 



Ancon sheep, 226, 257 



Annelid development, 129 



Apes, 188, 291, 310 



Application of embryology to 

 whole animal kingdom, 147 



Archeopteryx, no 



Arctic and Alpine flora, 183, 186 



Are species stable ? 32 



Artemia, 26, 33 



Ascidians, 64 



Australia, 172, 175, 184, 198 



B 



Barriers limiting specific distribu- 

 tion, 183 

 Bats, 1991, 34 



Beginnings of life, 7 

 Beginnings of organs, 226 

 Bermudas, 192 

 Bermuda lizard, 199 

 Birds of paradise, 181 

 Blind cave animals, 274 

 Boa-constrictor crossing the 



ocean, 194 

 Bobolink, 195 

 Brain of mammals, development 



of, 114 



Breaks in continuity, 7, 8, 9 

 Broca, on fertility of human race, 



35 

 Brooks' theory of heredity, 277 



Camels, distribution of, 181 



Carnivora, 66 



Causation, 313 



Cetacea, 66 



Classification, 55 ; significance 

 of, 53 



Colorado potato beetle, 166 



Comparison of arguments of Ag- 

 assiz and Darwin, 57 



Composgnathus, no 



Condylarthra, no 



Congenital variations, 274 



Connecting links, 63 ; among fos- 

 sils, 65, 91, 107 ; geological 

 position of, ill 



Consciousness, 266, 308 



Conscience, 315 



Contradiction between embryo- 

 logical histories, 127 



339 



