448 



INDEX 



progress, human, 426, 427. 

 progressive development, E. Cham- 

 bers on, 384. 

 ,, evolution, 334. 



,, cause of, 192. 



Wallace on, 390. 

 series, 232, 234. 



pronuclei, 131, 145, 146, Pig. 64. 

 protandrous, 353, 363. 

 protective resemblance, 337 342. 

 ,, and fluctuating varia- 



tion, 415. 

 ,, ,, natural selection, 



396, 405. 

 proteids, 7, 22. 



Proterotherium, 253, Fig. 109. 

 Proteus, 183. 

 prothallus, of fern, 103. 



,, ,, flowering plant, 108. 

 Protista, 38. 



,, dispersal of, 327. 

 ,, immortality of, 161. 

 protogynous, 353. 

 Protohippus, 310. 

 Protophyta, 38, 95. 



, , sexual differentiation in, 



91. 

 protoplasm, 2, 38. 



chemical composition, 



22, 23. 



controlling power, 23. 

 energy in, 7. 

 physical properties, 21. 

 selective action, 26. 

 sensitive to stimuli, 188. 

 streaming, 62. 

 Protopterus, 255, 291. 

 Protorohippus, 310, Fig. 153. 

 Prototheria, 301, 302. 

 Protozoa, 38, &c., Figs. 3, 4, 9, &c. 

 ,, non-adaptive characters, 



419. 



,, nuclear reduction, 139. 

 ,, powers of multiplication, 



81. 



,, sexual differentiation, 89. 

 Prozeuglodon, 318, Fig. 163. 

 prunes, stoneless, 204. 

 Pseudopanax cliathamicum, 417. 

 crassifolium, 417. 



ferox, 417. 



pseudopodia, 15. 

 Pteranodon, 299, Fig. 147. 

 Pteraspis, 290. 

 Pterichthys, 290, Fig. 136. 

 Pterosauria (pterodactyls), 236, 242, 

 299, Figs. 99, 147. 



Pterostylis trullifolia, fertilization, 



362. 



Pterygotus osiliensis, Fig. 137. 

 PulchripJiyllium crurifolium, 338, 



Fig. 170. 



Punnett, E, C., 208. 

 purity of gametes, 200, 206. 

 putrefaction, 218. 



Pyrenees, arctic vegetation ou, 333. 

 pyrenoids, 32, Figs. 5, 42. 



a 



QUADRTTMANA, 424. 

 quartz, 24. 



E. 



EABBIT, embryo, 265, Fig. 117. 



shoulder girdle, 234, Fig. 90 , 

 racial characters, transmission, 175. 

 radial canals, 120. 

 Eadiolaria, 25, Fig. 3. 

 radius, 237. 



rafts, dispersal by, 324. 

 range in time of animal groups, 284. 

 Ranunculus aquatilis and Ranunculus 



hederaceus, Lamarck on, 379. 

 rats, 179, 182, 325. 

 recapitulation hypothesis, 265 281. 

 ,, anticipated 



by Erasmus Darwin, 372. 

 receptor, 18. 



recessive characters, 197, 207. 

 recognition marks, 337. 

 red blood corpuscles, 52, 53, Fig. 15. 

 clover, robbed by humble bee, 



355, 356. 



Eed Sea, fauna, 323. 

 red snow, 27. 



reduction of chromosomes (reducing 

 division), 132139, 206, 207, Figs. 

 6568. 



regeneration, 167. 

 regression, filial, 210. 

 rejuvenescence, 92. 

 reproduction, 10. 

 Eeptilia, compared with Amphibia, 



294. 

 compared with Mammalia, 



232, 235. 



fossil, 295299. 



,, geological range, 284. 



giant, 406. 



limbs, 235. 



origin, 294, 295. 



