674 



INDEX 



Notidanidcv, 156 



Notochord, 1*: Balanoglossus, 3 : Cepha- 

 lodiscus, 9 : Rhabdopleura, 10 : As- 

 cidian larva, 31 : Amphioxus, 41, 53 : 

 Craniata, 66 See Vertebral column 



Notochorclal sheath, 41, 66 



Notochordal tissue, 41, 66 



Notorni*, 398, 402 



Notornis alba, 596 



Notary ctes, 467, 546, 548 



Nototherium, 605 



Nototherium mitclidli, 569 



Xototrema marsupium, 288 



Nuchal plates, 323* 



O 







BLIQUE SEPTUM, 371 



Obstetric Toad, 288 



Occipital plane, 482* 



Occipital region, 69* 



Occipital segment, 73* 



Oceanic Islands, 596* 



Oceanites, 387 



Octacnemidw, 19 



Octacnemus, 19, 25, 26 



Otiopi, 598 



Ocydromus, 388, 398, 402, 416 



Odontoblasts, 80*, 526 



Odontoceti, 451*, 501 



Odontoid process, of Amphibia, 279 : 



Lizard, 294 



Odontolcae, 385, 415, 416 

 Odontopteryx, 406 

 (Esophageo-cutaneous duct, Myxinoid, 



130 



Oikopleura, 19, 21, 25, 26 

 Oil-bird, 597 

 Oil-gland, 351* 

 Oken, Lorenz, 640 

 Old-world Monkeys, 525 

 Olfactory capsules, 69* 

 Olfactory lobe, 94* See Brain 

 Olfactory lobe, median: Amphioxus, 48 : 



Craniata, 94 



Olfactory organ, of Amphioxus, 48 : 

 Craniata, 101 : Lamprey, 124 : Myxi- 

 noids, 130 : Dog-fish, 150 : Elasmo- 

 branchii, 165 : Trout, 199 : Ceratodus, 

 231 : Frog, 265 : Amphibia, 287 : 

 Lizard, 308: Reptilia, 335: Pigeon, 

 378 : Mammalia, 547 

 Olfactory region, of Skull, 69* 

 Olfactory ventricle, 94* See Brain 

 Onychodactyhis, 277 

 Opercular, 192 



Operculum, of Balanoglossus, 2 : Crani- 

 ata, 60 : Holocephali, 175 : Teleostomi, 

 209 : Tadpole, 271 : Birds, 410 

 Ophidia, 311, 312*, 313, 320, 328, 332 

 Opisthoccelous, 213* 



Opisthocomm, 388, 392, 393 



Opisthotic, 72* See Skull 



Opossums, 449, 466, 489, 492, 531, 552, 



564, 568 



Optic capsules, 69* 

 Optic lobes, 94* -See Brain 

 Optic thalamus, 96*- -See Brain 

 Optic ventricle, 94* See Brain 

 Optoccele, 94* See Brain 

 Oral hood, 39* 

 Oral siphon, 13 



Orang, 460, 520, 522, 524, 525, 566, 57-3 

 Orbicular, of Rabbit, 426 



Orbito-sphenoid, 72* See Skull 



Orca, 450, 451 



Orca gladiator, 472 



Oriental region, 594 



Ormthorhynchus, 448, 461, 464, 465, 485, 

 486, 488, 489, 530, 543, 546, 547, 564 



Ornithosauria, 415, 416 See Pterosauria 



Orthayoriscus, 217 



Orthotomus, 408 



Orycteropodidw, 450 



Orycteropus, 492, 493, 532 



Orycteropus capensis, 471 



Oscordis, 543 



Ossicula auditus, of Rabbit, 426 



Ossification, centres of, 72* 



Osteo-dentine, 79* 



Osteostraci, 244 



Ostranon, 207 



Ostracodermi, 243 



Ostrich, 392, 394, 401, 404, 407, 408, 416 



Otariidce, 456, 475 



Otis, 388 



Otocyst, 32 



Otters, 456, 475 



Ovidffi, 453 



Ovis aries, 507 



Ovulists, 631 



Owen, R., 641, 646 



Owls, 388, 394, 402, 406 



Oxen, 453, 472, 526, 550, 565 



Oyster-catchers, 388 



^EDOGENESIS IN AXOLOTL, 289 



Pachyornis, 402 



Pacinian corpuscles, 100*, 101 



Paleearctic region, 592 



Pal^ohatteria, 343 



Pah.t'omscux macropomus, 228 



Palajontological evidence of evolution, 610 



Palwospondylus ganni, 133 



Palamtdea, 388 



Pallas, 634 



Palatine, 74* See Skull 



Palato-quadrate, 71*- -See Skull 



Pallium, 96* 



Pancreas, 81* -See Digestive system 



