INDEX 



Neural spine, 147 



Neural tube, Craniata, 73* 



Neurenteric canal, 34, 58, 59, 290 



Neurenteric passage, 183 



Neurocale, 2*, 34, 35, 49, 53, 57, 58 



Neuroglia, 98* 



Neuromast-organs, 107*, 108 



Neuromasts, 107*, 108 



Neuron, 44, 49, 50, 53, 57, 58. 98 



Neuropore, 34, 54, 55, 58, 61, 62 



Newts, 264, 293, 296 



New Zealand, comparison of its physical 

 conditions and fauna with .those of 

 Great Britain, 619 



New Zealand region, 632 



Nictitating membrane, of Elasmobranchii, 

 179 : Frog, 265 : Lizard, 315 : Pigeon, 

 380 : Rabbit, 446 : Mammalia, 580 



Nidicoke, 442* 



Nidifugae, 442* 



Non-Ruminants, 482* 



Nostril, 109 



Notidanidce, 169, 178 



Notochord, 1*: Balanoglossus, 6 : Cepha- 

 lodiscus, 10, 12 : Rhabdopleura, 12, 13 : 

 Appendicularia, 24 : Ascidian larva, 

 34 : Amphioxus, 47, 49, 58, 59 : Crani- 

 ata, 71, 72 See Vertebral column 



Notochordal sheath, 47, 72, 73 



Notochordal tissue, 47, 72, 73 



Nolornis, 426, 430, 620, 642 



Notornis alba, 632 



Notoryctes, 495, 579, 581 



Notoryctes typhlops, 495 



Nototherium, 642 



Nolotherium mitchelli, 603 



Nototrema marsupium, 309, 310 



Nuchal plates, 344* 



Nucleus, of Salpge, 29 * 



Nurse, Doliolum, 39*, 41 











BLIQUE SEPTUM, 400 



Obliquus externus, 274, 275 



Obliquus internus, 274, 275 



Obstetric Toad, 308 



Obturator foramen, 457 



Obturator notch, 392 



Occipital condyle 



Occipital plane, 513* 



Occipital region, 76* 



Occipital segment, 80* 



Oceanic Islands, 632* 



Oceanites, 415 



Octacnemidce, 27 



Octacnemus, 27, 28, 29 



Octochcetus, 621 



Octopods, 634 



Oculomotor nerve, 104 : ganglion, 104 



Ocydromus, 416, 426, 430, 444, 620, 632 



Odontoblasts, 86*, 558 



Odontoceti, 480*, 501, 531, 533, 534, 580, 

 606 



Odontoid process, of Amphibia, 299 : 

 Lizard, 316 



Odontolcse, 413, 443, 444, 445 



Odontopteryx, 434 



(Esophageo-cutaneous duct, Myxinoid. 

 140 



Oikophura, 22, 24 



Oil-bird, 633 



Oil-gland, 380" 



Oken, Lorenz, 680 



Old-world Monkeys, 557 



Olecranon, 321 



Olfactory bulb, 100, 157, 212 



Olfactory capsules, 75* 



Olfactory nerve, 103 



Olfactory peduncle, 194, 239 



Olfactory tracts, 239 



Olfactory lobe, 100* See Brain 



Olfactory lobe, median : Amphioxus, 54 : 

 Craniata, 100 



Olfactory organ, of Amphioxus, 54, 55 : 

 Craniata, 109* : Lamprey, 132, 133, 

 134 : Myxinoids, 139 : Dog-fish, 163 : 

 Elasmobranchii, 179 : Trout, 214 : 

 Ceratodus, 254 : Frog, 284 : Amphibia, 

 308 : Lizard, 331 : Reptilia, 360 : 

 Pigeon, 405 : Mammalia, 580 



Olfactory region, of Skull, 76* 



Olfactory ventricle, 100* See Brain 



Olivary body, 472* 



Omentum duodeno-hepatic, 324 



Omentum gastro-hepatic, 324 



Omentum, great, 403 



Omosternum, 272, 273 



Onychodactylus, 298 

 Opercular, 199 



Operculum, of Balanoglossus, 4 : Crani- 

 ata, 67 : Holocephali, 189 : Trout, 199 : 

 Teleostomi, 225 : Dipnoi, 247, 249 : 

 Tadpole, 291 



Ophidia, 334*, 339, 342, 343, 344, 347, 

 348, 353, 357, 358, 359, 360, 361, 362, 

 367, 368, 370 



Opisthoccelous, 229*, 298 



Opisthocomus, 416, 420, 421, 633 



Opisthotic, 79*, 80 See Skull 



Opossums, 478, 492, 495, 521, 524, 563, 

 584, 598, 602 



Opthalmic nerve, 104, 105 



Opthalmicus profundus, 161 



Optic capsules, 75* 



Optic cup, 112, 113* 



Optic chiasma, 159 



Optic foramen, 452* 



Optic lobes, 102* See Brain 



Optic nerve, 103 



Optic thalamus, 102* See Brain 



Optic vesicle 112* 



Optic ventricle, 102* See Brain 



