INDEX 



315 



hammerhead, 66 ; the human, 168, 

 170, 171 ; of birds, reptiles, am- 

 phibia, 171 ; human hemispheres 

 of brain like adult cat or dog, 

 215. 



Embryology, 32, 33, 34 ; of no form 

 fully understood, 57 ; general prin- 

 ciples of, 57-67 ; embryonic agree- 

 ment, 65 ; of insects, 67 ; weight 

 of facts of, 69 ; comparative, a 

 distinct division of zoology, 70, 

 71 ; 76, 94, 100 ; evidence of, 170 ; 

 of mind, 202, 214 ; in early stages 

 of human, no nervous system 

 present, 214 ; development of, 

 215. 



English sparrow, 123, 127. 



Environment, 111, 112; influences 

 of, 126 ; determines mode of life 

 of a race, 213. 



Epoch, Glacial, 86 ; Silurian and 

 Devonian, rich array of types, 93 ; 

 Cenozoic, 96. 



Erosion, 89. 



Eskimo, picture-writing, 223. 



Ethics, 281 ; biological, 283 ; natural, 

 284 ; evolution of, 285. 



Ethnology, 177. 



Evolution, the Doctrine of, 1 ; is it a 

 science, 3 ; the conception of, 8 ; 

 organic, 10-12; 31, 32; evidence 

 of, 54, 95 ; of amphibia, 62 ; of 

 birds, 63 ; of protozoa, 69 ; theory 

 of, supported by palaeontology, 76 ; 

 cosmic, 84 ; biological evidence of, 

 91 ; three important elements of, 

 109 ; adaptation, variation and 

 inheritance, 110; mechanical, 109; 

 dynamics of, 109 ; second element 

 of, 122; human, 150-196; 174; 

 physical, of man, falls into two 

 groups, 153 ; of human races, 176 ; 

 racial, 177, 178; mental, 197-240; 

 human faculty as a product of , 212 ; 

 mental as real as physical, 214; 

 of brain, 214-217 ; of art of writ- 

 ing, 223 ; method of mental, 231 ; 

 social, 241 ; of societies of insects, 

 268 ; himian, biological interpre- 

 tation of, 267-274; of higher 

 human life, 278-311 ; of ethics, 

 285; final conception of, 307-311. 



Factors, primary, secondary, 110; 

 three kinds. 111; congenital, 113. 



Falls of St. Anthony, 86. 



Fishes, lowest among common ver- 

 tebrates, 46 ; trunk-fish, cow-fish, 

 pufT-fish, mouse-fish, flounder, 46 ; 

 most primitive backboned animals, 

 92 ; 94 ; 157 ; embryos of, 171. 



Fiske, 139. 



Flies, may, 259. 



Flounder, a variant of the fish 

 theme, 66. 



Fossilization, conditions of, 77-78. 



Fossils. 73-105 ; remains of, 73 ; 

 groups, 77 ; 78, 79 ; order of suc- 

 cession, 91 ; oldest rocks devoid 

 of, 92 ; forms, 99. 



Fowl, game cock, 138 ; pigeons, 138. 



Frog, 45 ; eggs of, larva, develop- 

 ment of, 58, 59, 60, 68. 



Galapagos Islands, 102, 103, 104. 



Galton, 142, 147; heredity of mental 

 qualities, 232. 



Gametes, 252. 



Gastrula, 68. 



Gemmules, 143. 



Genera, 32. 



Generation, spontaneous, 78. 



Geographical distribution, 32. 



Geological agencies, rain, rivers, 

 glaciers, 88 ; construction, volca- 

 noes, 88. 



Geology, data of, 83, 84. 



Germ, Bonnet's idea of, 70; cells, 

 144, 146 ; plasm, 145, 146. 



Gibbon, 163. 



Gills, 58, 62. 



Gill-slits, bars, clefts, 61, 62, 64; 

 in embryos of lizards, birds, mam- 

 mals, 69 ; 171. 



Giraffe, 133. 



Glaciers, alterations made by, 87. 



Goats, 157. 



GoriUa, 163, 165, 195. 



Grand Cafion of the Colorado, 85, 90. 



Gravitation, 155. 



Guinea-pigs, Brown-S6quard'8, 148. 



GuUck, 103. 



Haeckel, 63, 71, 184. 

 Haemoglobin, 22. 



