Part 36

Sociology, Darwinism and, 264-280 --History and, 255

Sollas, W. J., 134

Sorley, W. R., 217

Species and varieties, 100

Spencer, H., on evolution, 204-209 --on the theory of Selection, 41

Spencer, H., on Sociology, 268 --on the transmission of acquired characters, 149 --on Weismann, 41, 150 --2, 17, 217, 231, 268

Sphingidae, variation in, 37

Spinoza, 153, 206

Standfuss, 82

Stephen, L., 217

Sterility in hybrids, 104-106

Sterne, C, Foot Note 10

Struggle for existence, 25, 26, 272-274

Sutton, A. W., Foot Note 73

Synapta, calcareous bodies in skin of, 38-41

Syrphus, 75

Tarde, G., 279

Tennant, F. R., Foot Note 218

Tetraprothomo, 138, 144

THOMSON, J. A., on Darwin's Predecessors, 1-22 --150 --and P. Geddes, 276

Treschow, 201

Treviranus, 8, 14, 15

Turgot, 249

Turner, Sir W., 150

Tylor, 267

Tyndall, W., 267

Tyrrell, G, Foot Note 222

Uhlenhuth, on blood reactions, 135