INDEX 



449 



respiration, 8. 



,, in Amoeba, 17. 



,, ,, embryos, 270. 



,, ,, plants, 32, 33. 



response to stimuli, 18. 

 Reunion, peach tree3 in, 182. 

 reversion, 261, 262. 



,, Mendelian explanation, 



208. 



rhinoceros, feet, 241. 

 Bhynchocephalia, 259, 295 (see also 



Sphenodon). 

 ribbon- wood, 417. 

 ribs, rneristic variation, 149. 

 right whale, 245, Fig. 101. 

 Bitzema Bos, 179. 

 rock-formation, 282. 

 rodents, 301. 

 "Rodney," brig, 399. 

 Rodriguez, 258. 

 Romanes, G. J., 333, 417, 418. 

 Rontgen rays, 187. 

 root-cap, 50. 



root, growing point, 76, Figs. 33, 34. 

 Rosenthal, 179. 

 rostellum, 360. 



rotifers, parthenogenesis, 144. 

 rudimentary organs (see vestigial 

 organs). 



,, ,, Charles Darwin 



on, 392. 



Rumia crat'<jata, larva, Fig. 169. 

 rust, in wheat, 205. 

 rye, fertilization, 412. 



S. 



SACCULIXA, degeneration, 401, Fig. 



183. 



sage (see. Sal via). 

 Sagitta, origin of germ cells, 130, 



Fig. 63. 



salt, in sea, 287. 

 Salvia, structure of flower and 



fertilization, 358, 359, Fig. 181. 

 Salvinia, 105. 



Sandwich Islands, oceanic, 332. 

 sap, 65. 



,, nuclear, 70. 

 saprophytic nutrition, 34. 

 sarcode, 38. 

 Sarracenia, 262. 

 Sanropsida, 300. 

 Sauropterygia, 297, Fig. 141. 

 scapula, 234, Figs. 89, 90, 93. 

 scents, of flowers, 355. 



B. 



Schleicher, 69. 

 Schleiden, 38. 

 Schcetensack, 423. 

 Schwann, 38. 

 Scrophularia nodosa, 353. 

 scurf, 55. 



sea anemones, 114. 

 ,, coast, selection in, 395. 

 ,, firs, 114. 



,, urchins, artificial partheno- 

 genesis, 145. 



,, ,, blastomeres, 45. 



,, ,, hybridization, 174, 



175. 



,, ,, larva 1 , 276. 



seal, paddles, 244, Fig. 100. 

 Secondary Era, 284, 285. 



,, sexual characters in 



Ccolomata, 125. 

 secretions, controlling growth, 408. 



,, internal, 126. 



sedimentary rocks, 282, 286. 

 sedimentation, rate of, 285, 286. 

 seed, 109, Fig. 56. 

 ,, coat, 109. 

 ,, leaves (ste cotyledons), 

 seedling of Acacia, 280, Fig. 132. 



,, ,, pea, Fig. 56. 

 seeds, dispersal ,321. 

 Seeley, H. G., 297. 

 segmentation, metameric, 149, 266. 

 segmentation of ovum, 45, 263. 

 in Amphioxus, 45, Fig. 13. 

 ,, birds and reptiles, 270. 

 ,, frog, 268, Fig. 119. 

 Hydra, 118. 

 ,, mammals, 271. 

 interpretation of, 265. 

 segregation of germ cells (see germ 



cells, origin), 

 selection, artificial, 395, 396. 



,, ,, Charles Darwin 



on, 387. 



,, by insects, 396. 

 ,, continuous, 411. 

 ,, germinal, 173. 

 ,, natural (see natural selec- 

 tion). 

 ,, not confined to living 



things, 395. 



sexual (see sexual selec- 

 tion). 



,, single, 412. 

 self- fertilization, 351, 352, 353. 

 sematic colours, 336, 342. 

 Seinon, Richard, 186. 

 sensation, 16. 



G G 



