Index 
Parrot, 42. 
Parsons, 83. 
Parthenogenesis, 206-207, 322. 
Parthenogenetic species, 372-374. 
Patella, 181. ~ 
Paulmeier, 4o1. 
Peacock, 210, 432, 447. 
Peahen, 432. 
Pearson, 167. 
Pearson's law, 203. 
Peebles, 288, 290, 296. 
Penicillium, 257. 
Penycuik experiments, 60. 
Perez, 353- 
Pergande, 327, 333. 
Peruke antlers, 432. 
Petrunkewitsch, 356, 417. 
Pfeffer, 178. 
Pfliiger, 173, 174, 366, 382. 
Phagocata, 288. 
Phillips, 211, 335, 354. 
Philodenide, 374. 
Philosamia, 205. 
Phototropism, 265. 
Phromali, 358. 
Phylloxera, 273, 274, 322, 332-333) 394 
396. 
Phytopterus, 273. 
Pictet, 27, 29, 30, 32, 341 35) 45, 313-314, 
380-381, 437. : 
Pieris crategi, 34. 
Pigeons, 135-136. 
Pike, 248. 
Planaria, 288, 289. 
Planarians, 254, 295. 
Polar bodies, 397-400. 
Polish, 127-129. 
Polydactylism, 117-121. 
Polygnotus, 411. 
Polyphemus, 338. 
Polyspermy, 182. 
Pomace fly, 190-195. 
Porthesia chrysorrheza, 29. 
Porto Santo rabbits, 41, 42. 
Potts, 241. 
Poulton, 13, 116. 
Poultry, 121-135. 
Pressure, 267-268. 
Primula, 161, 162, 164-165. 
Préscher, 255. 
Prostate, 436. 
Przibram, 421. 
Psyche, 374. 
Punnett, 121, 129, 385. 
Pygera, 401. 
Pyrrhocoris, 401. 
Quetelet, 199. 
453 
Rabbits, 106-110, 245, 257. 
Rana, 173-174, 200, 290, 299, 300, 381~ 
383, 396. 
Rats, 110-113, 188-189, 257, 385. 
Rauber, 261, 367. 
Raynor, 153. 
Réaumur, 322. 
Regeneration, 277-282. 
Reichenbach, 357. 
Reptiles, 246. 
Rhabditis, 369-371. 
Rhodites, 273, 358. 
Rhodocera rhammi, 23. 
Ribbert, 289. 
Riley, 331, 376-377. 
Ritzema Bos, 188, 189. 
Romanes, 42, 52, 53, 54, 63. 
Rorig, 448. 
Rossi, 267. 
Rotifer, 317, 346-350, 374. 
Rough coat, 102-104. 
Roux, 267. 
Rumplessness, 133, 134. 
Rusconi, 173. 
Sacculina, 438. 
Sachs, 240. 
Sadler, 391-392. 
St. Hilaire, G., 42. 
Salamander, 277, 281. 
Salmon, 15, 254, 261. 
Salts, 257-260. 
Samia, 301. 
Samter, 41. 
Sarcophaga, 379. 
Sargent, 259. 
Saturnia, 313. 
Scent glands, 431. 
Schmankewitsch, 41, 339. 
Schultz, O., 256, 408. 
Schultze, 385-386, 392, 393, 394- 
Schuster, 83, 96. 
Scott, 234. 
Secondary sexual characters, 429-447. 
Seeliger, 175, 177. 
Selection, 198-211. 
Semon, 58, 59. 
Senescence, 246-247. 
Sepia, 265. 
Serturella, 265. 
Shad, 15. 
Shank, 125. 
Sheep, 116. 
Shufeldt, 316. 
Shull, 212. 
Sida, 340. 
v. Siebold, 353, 356, 357, 407, 408. 
Silkworms, 141-149. 
