52 2 READINGS IN EVOLUTION, GENETICS, AND EUGENICS 



Primula kiwensis, 364; P. sinensis, 317, 



394, 445 

 Priority, law of, 117 

 Probable error, 368 

 Procamelus, 74, 75 

 Promise of Race Culture, 497-509 

 Pronucleus: male, 301; female, 302 

 Protective resemblance, 200, 201 

 Protohippus, 72 

 Protylopus, 74, 75 

 Pterodactyl, wing of, 134 

 Punnett, R. C, 385, 395, 396, 446 

 Pure lines, heredity in, 376-79 

 Purity of gametes, 386, 387 

 Python, hind limbs of, 141, 142 



Quadrumana, 148 



Rabl, C, 166 



Race culture and human variety, 504, 



50s 

 Rana syhatica, ^;^;^; R. palustris, 333 

 Recapitulation, doctrine of, 60, 171, 



172; critique of, 173-82 

 Reduction divisions, in maturation, 405 

 Reighard, J., 203 

 Remora, 199 

 Reversion, 13 



Revival of Science, the, 15, 16 

 Rhodeus amarus, 212 

 Rignano, E., 335 

 Robinson, L., 151, 152 

 Rodentia, loss of teeth in, 180 



Romanes, G. J., 35, loi-io, 129-63, 263, 

 264, 329 



Roosevelt, T., 217 

 Rosanoff, A. J., 465 

 Roux, W., 268 

 Rumford, B. T., 277 

 Ruminants, collar-bone of, 180 

 Ruskin, J., 503, 504, 508 

 Ruskin and race culture, 503, 504 

 Rutherford, E., 275 



Sacculina, 171, 181, 198, 453 

 Saleeby, C. W., 497-509 

 Saltatory, variations, 38 

 Sandwich Islands, fauna of, 109, no 

 Saunders, 393 



Scardafella inca, 316, 317; S. dialeucos, 

 316, 317; 5. braziliensis, 316, 317; 

 S. ridgwayi, 316, 317 



Schoetensack, Dr., 89 



Schuchert, C, 67, 68, 69 



Scott, W. B., 5, 6, 62, 63, 73-6, 82, 123- 

 28, 173-82 



Scrophularia, 319, 320 



Seals, comparative anatomy of, 129, 130 



Secondary sexual characters, 453, 454 



Seduni spedahilc, 312-14 



Segregation, Mendel's Law of, 40-42, 



382-85 



Semon, R., 335 



Serolog>', evidences from, 60 



Sex determination, 449-56; chromo- 

 some mechanism of, in Drosophila, 

 410 ff.; in parthenogenetic species, 

 451, 452; nutrition theory of, 449; 

 at time of fertilization, 449, 450; 

 ^'-^arious theories of, 449-51 

 vSex differentiation, 455-56 



Sex, Heredity and, 44, 305, 306 



Sex-linked inheritance, 433, 440 



Sexual coloration, 204 



Sexual Selection, 26, 230-32 



Shelford, V. E., 190 



Shull, A. F., 73, 76-80, 100, lor, 117-20 



Shull, G. H., 43 



Signals and recognition marks, 203, 204 



Sims, G. R., 503 



Smith, E. A., 339 



Smith, G., 453 



Snow, E. C, 493 



Solidago virguarea, 324 



Species, definitions of, 121, 122 



Spencer, H., 4, 19, 28, 29, 264, 325, 508 



Spermatid, 298, 299 



Spermatocyte, 298, 299 



Spermatogenesis, 298, 299 



Spermatogonium, 298, 299 



Spermatozoon, 165, 298, 299 



Spontaneous generation, 12 



Sports, 38 



Sprengel, C. K., 210 



Standard deviation, 367, 368 



Staples-Brown, R., 397 



Statistical study: of variation, 365-70; 

 of heredity, 370-75 



Stegodon, 76, 77, 78, 79 



