INDEX 



449 



respiration, 8. 



,, ia Amoeba, 17. 



,, ,, embryos, 270. 



,, plants, 32, 33. 

 response to stimuli, 18. 

 Reunion, peach trees in, 182. 

 reversion, 261, 262. 



Mendelian explanation, 



208. 



rhinoceros, feet, 241. 

 Rhynchocephalia, 259, 295 (see also 



Sphenodon). 

 ribbon-wood, 417. 

 ribs, meristic variation, 149. 

 right whale, 245, Fig. 101. 

 Ritzema 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 crattryata, larva, Fig. 169. 

 rust, in w>eat, 205. 

 rye, fertilization, 412. 



S. 



SA< CULIXA, degeneration, 401, Fig. 



183. 



sage (see Salvia). 

 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. 



Schleicher, 69. 

 Schleiden, 38. 

 Schoetensack, 423. 

 Schwann, 38. 

 ticrophularia nodosa, 353. 

 scurf, 55. 



sea anemones, 114. 

 ,, coast, selection in, 395. 

 ,, firs, 114. 



,, urchins, artificial partheno- 

 genesis, 145. 



,, ,, blastoineres, 45. 



,, ,, hybridization, 174, 



175. 



larva-, 276. 



seal, paddles, 244, Fig. 100. 

 Secondary Era, 284, 285. 



,, sexual characters in 



Coelomata, 125. 

 secretions, controlling growth, 408. 



internal, 126. 



sedimentary rocks, 282, 28(5. 

 sedimentation, rate of, 285, 286. 

 seed, 109, Fig. 56. 

 coat, 109. 

 ,, leaves (sfe cotyledons), 

 seedling of Acacia, 280, Fig. 132. 



,, ,, pea, Fig. 56. 

 seeds, dispersal ,321. 

 Seeley, II. 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. 



