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 | vii, 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 | 161 |
| 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 | 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 | 158 |
| examples of | 329–332 |
| good and evil in | 336 |
| Species, an arbitrary, not a natural unit | 116 |
[ 389 ]
