700 



INDEX 



Nikolski, 255 



Niskoubina, 344 



Nitabuch, 477 



Nolf, 367, 419, 460 sqq. 



Noorden, von, 68, 354, 356, 497, 510, 



513, 515 

 Nudibranchs, 14 

 Nussbaum, 141, 312 sq., 632 

 Nycticebus, 408 

 Nylghau, oestrous cycle in, 49 



O 



Oceanu and Babes, 356, 567 

 Ocneria dispar, 307 

 Oddl and Vicarelli, 519 



OSstrus or OEstrum, defined, 36 



ffistrous cycle, chap, ii., 335 



Offergeld. See Kruieger and Ofler- 

 geld 



OUver, 83, 85, 138, 614 



Onchorhynchus, 30 n. 



Onuf, 253 



Oogenesis, chap. iv. 



Ophelia, 221 



Ophiothrix fragilis, 204 n. 



Opossum, 385, 484 



Orang-utan, oestrous cycle in, 63 



Ornithodelphia, 380 



Ornithorhynchus paradoxus, 149 



Orton, 653 



Orycteropus, 375 



Osborne and Campbell, 275 



Oser and Schlesinger, 537 



Osbima, 512 



Ostwald, 300 sq. 



Ott, 67, 68 



Otter, breeding season of, 59 ; 416 



Oudemans, 239, 307 



Ovariotomy, 314, 316 sqq. ; and 

 menstruation, 330 sqq. ; and preg- 

 nancy, 341 sqq. 



Ovary, changes in, during the 

 oestrous cycle, chap. iv. ; in- 

 fluence of, 314 sqq. ; Man, 314, 

 316 sq., 330 sqq. ; deer, 314 ; 

 poultry, 315 sg. ; rabbit, ZIT sqq. ; 

 guinea-pig, 320 ; rat, 321 sqq. ; 

 internal secretions of, chap. ix. 

 passim ; innervation of, 526 



Overlach, 366 



Ovis, 150 



Ovis ammon, 43 



Ovis argali, 43 



0ms hurrhel, 42 sq. 



Ovis canadensis, 43 



Ovis musimon, 42 



Ovis poli, 43 



Ovis traxjela/phus, 42 



Ovis vignei, 43 



Ovulation, 125 sqq. ; rabbit, 134 ; 

 mouse, 135 ; rat, ih. ; guinea-pig, 

 ih. ; dog, ih. ; sow, i6. ; ferret, 

 136, mare, ib. ; donkey, ib. ; cow, 

 ib. ; sheep, ib. ; bat, 136 sq. ; 

 Primates, 137 ; Man, 137 sqq. ; 

 Invertsbrata, 137 n. ; and men- 

 struation, 330, 333 n., 335 



Ovum, formation of, 160 sq. ; 

 chap. X., part ii., passim ; the 

 ovarian, 370 sq. ; the fertiUsed, 

 371 sqq. 



Owen, 31, 42, 61, 247, 359 



Ox, 288, 296, 306, 349, 486 



Pachyuromys duprasi, 41 



Paladino, 146 



Palolo worms, 10 sq., 134 



Paludina, 175, 633 



Papio, 63 



Pa/pio porcarius, 64 



Paramoecium, 6, 212 sqq. 



Paramcecium, catidatum, 211 



Parthenogenesis, 216 sqq. 



Parturition, 527 sqq. ; human, 



531 sqq., 538 ; other Mammalia, 



535 sqq. ; nervous mechanism of, 



537 sqq. 

 Patella, 14, 216, 224 n. 

 Paterson, 143, 365 

 Paton, Noel, 18, 19, 278 sq., 349, 



496, 508 

 Paton, Kerr, and Watson, 434, 508 

 Payer, 511, 520 sq. 

 Payne, 634 



Pgopl 211 



Pearl' and Surface, 333, 605, 651 

 Pearson, Karl, 202, 605, 684 

 Pearson, Lee, and Bramley-Moore, 



605 

 Peel, 681 

 Pelican, 30 

 Pellkann, 235 

 Pelodytes, 203 

 Pembrey, 272 

 Pepere, 349 



Perameles, 39, 339, 384 sq. 

 Perch, 277 sq. 

 Perez, 158, 176, 217, 629 

 Peripatus, 11 

 Perry-Coste, 72 

 Peters, 361, 366, 466 sq., 469, 471, 



473, 479, 515 

 Petrel, stormy, 26 

 Petrunkewitsch, 628 sq. 

 Plannenstiel, 264, 368 

 Pleffer, 215 



