Index 



469 



Oscillaria, 320. 

 Ostrich, 203, 354. 

 Oxalis, 290, 404. 

 Oxen, 304. 

 Oxide, 29. 



Packard, 231, 260. 



Pahidina, 320, 322. 



Pangenesis, 233-240. 



Papilio, 158, 360, 388 ; polyxenes, 3. 



Paradisea, 197. 



Paramecium, 395-398, 442-447. 



Parasitism, 352-353. 



Parker, 393. 



Parrots, 6. 



Partridge, 410. 



Passerella, 311. 



Passiflora, 148. 



Pavo, 317. 



Peach, 134. 



Peacock, 200, 317-318. 



Peafowl, 198. 



Pearson, 265, 267, 268-270, 



Peas, 281-286. 



Peckham, 178, 408. 



Pelobates, 421. 



Pfliiger, 424, 430. 



Phosphorescent organs, 22, 133. 



Physa, 320, 322. 



Pigeons, selection in, 102. 



Pipilo, 311. 



Pisum, 278. 



Pithecia, gq.8. 



Planaria, 380. 



Planarians, 394. 



Plants, 403, 415 ; color of, 24; influence of 



light, 17. 

 Plato, 304. 

 Plover, 202. 



Poisons, 13, 14, 15, 18, 20, 377. 

 Polar bear, §. 

 Pollen, 2, 125. 

 Polygon, 262. 

 Porthesia, 389. 

 Primula, 361-365. 

 Prionidas, 182. 

 Probosces of insects, 127. 

 Protective coloration, 5, 6, 16, 158, 159, 

 Proteus, 227. 

 Protohippus, 51. 

 Przibram, 347. 

 Psyche, 419. 

 Ptarmigan, 5. 

 Pyrodes, 182. 



Quetelet, 289. 

 Quiscalus, major, 173. 



Rabbit, Porto Santo, 316-317. 

 Rabbits, 304. 

 Rabbits in Australia, 112. 

 Race-horse, 134. 

 Ranunculus, 305, 

 Ray-florets, 135. 

 Rays, electric organs of, 22. 

 Reaumur, 388. 



Recapitulation theory, 58-83. 

 Reduction division, 432-433. 

 Regeneration, 15, 16, 27, 379. 

 Regulations, 27, 28. 

 Reproductive organs, 19, 

 Rep*tiles, fossil, 52, 53. 

 Reugger, 205. 

 Rhodpdendron, 330. 

 Rhynchaea, 201. 

 Riley, 424. 

 Rivers, 28. 

 Robinia, 404, 



Romanes, 132, 250=256, 412. 

 Rose, 307. 

 Rothert, 398. 

 Rotifers, 118, 353, 424. 

 Roulin, 304. 

 Roundworms, 176, 353. 

 Rudimentary organs, 22. 

 Ryder, 260. 



Sacculina, 353. 



Sachs, 10. 



Salmon, 19. 



Salter, 314. 



Salvin, 201. 



Saphirina, 176. 



Savages, 210. 



Saw-flies, 425. 



Scarlet tanager, 198. 



Schaefer, 244. 



Sclater, 198. 



Scops, 312. 



Scott, 148, 259. 



Sea-anemone, 341. 



Sea-urchin, 341. 



Secondary sexual characters, 21. 



Selection, 116. 



Selection, artificial, 91, 92, 96, 97, 98. 



Self-fertilization, 126. 



Semper, 260, 



Setchel, 320. 



Sexual characters, secondary, 372-374. 



Sexual selection, 167. 



Sharp, 350, 425. 



Sheep, 208. 



Sherrington, 244. 



Shrew mice, 206. 



Silkworm, 428, 447. 



