INDEX 



PAGE 



Schuchert, Charles, and Walker, H., cited 120 



Science, definition of 9 



Scotch pine, figure showing 146 



Scott, D. H., figure cited from work by 148, 166 



Scott, William Berryman, chapter by 81-101 



Sea urchins in Chalk of England, changes noted in species of 109-110 



variant forms of 117-119 



Seaweeds, fossil 160 



Seed-bearing fern, figure showing 148 



reference to 160 



Segregation, effects of 6-7 



Selaginella amoena, figure showing 146 



Selenka, cited 95 



Seymouria, features of 281 



Shakespeare, quotations from \ii, 186 



Sharks, evolution of 277 



Sheak, cited 309 



Sherrington, Charles Scott, introduction by vii-ix 



Shipley, Arthur Everett, chapter by 186-209 



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



Sigillaria, reference to 165 



Silurian period, events of I6l 



fishes and fish-like forms of 129, 273 



fossils of 258-259 



source of name of 159 



Siwalik region of India, remains of apes found in 267. 



Size of animals, evolutionary increase in 328 



Skulls, human, ape characters of early forms of 133 



Sladen, figure cited from ' 203 



Slime moulds, character of 144, 145 



Smith, G. Elliot, chapter by 311-326 



cited 289, 393 



Smith, William, references to 103, 126 



Snails, evidence of evolution afforded by 15 



subspecific divisions of 115 



Snake, vestigial legs of 36, 37 



vestigial lung of 37 



Solenhofen, Bavaria, fossil reptile-bird from 260-261 



Solitaire, flightless bird of Mauritius, reference to 99 



Solitary bee, cells of 206 



nest of r 195 



Sonoran zoological region, location of 85 



South Africa, climate of, in Permian time 285 



South America, butterflies of, changes of colour in 180-181 



migration of horses from North America to 230 



Pleistocene animals of 90 



Tertiary mammals of 87-91 



Special creation and evolution, comparison of theories of 242 



Specialization in evolution, consequences of 1 58 



examples of 329-332 



good and evil in 336 



Species, an arbitrary, not a natural unit 116 



[389] 



