Smith, W., influence of his teaching on Geological Society, [27]
Sollas, W. J., on Evolution and Uniformitarianism, [152], [153]
Species, origin of idea of, [9];
number of species of animals, [10];
of plants, [11]
Struggle for existence, Lyell on, [103], [107];
de Candolle on, [107]
Theory of the Earth, Hutton's, [17];
Scrope's, [36]
Thompson, G. P., see Scrope, [33]