INDEX. 



431 



Neomeris, 408. 

 Neomylodon, 383. 

 Nephridia, 116. 

 Nephrostomes, 117. 

 Nephrotome, 103. 

 Nerve, abducens, 61. 



" accessory of Willis, 

 64. 



" afferent, 47. 



" auditory, 63. 



" buccalis, 62. 



" cranial, 58. 



" efferent, 47. 



" glossopharyngeal, 63. 



" general cutaneous, 64. 



" hyomandibularis, 62. 



" intestinalis, 64. 



" lateralis, 64. 



" lingualis, 63. 



" mandibularis, 61. 



" maxillaris, 61. 



" mixed, 59. 



" motor, 46. 



" oculomotor, 61. 



*' olfactory, 60. 



" ophthalmicus, 61, 62. 



" optic, 60. 



" palatine, 62. 



" patheticus, 59. 



** pneumogastric, 64. 



" post-trematic, 63. 



" pretrematic, 63. 



*' roots of, 46. 



" sensory, 46. 



•' somatic, 64. 



" spinal, 46. 



" spinal accessory, 59. 



" sympathetic, 47. 



" trifacial, 59. 



" trigeminal, 61. 



" trochlearis, 61, 



" vagus, 63. 



" visceral, 64. 



" cells, 10. 

 Nervous tissue, 10. 

 Nesodon, 402. 

 Nesopithecid^, 415. 

 Nesopithecus,4i5. 

 Neural arch, 138. 



" crest, 47. 

 plate, 43. 



" process, 135. 



'• spine, 138. 

 Neurapophysis, 135. 



Neurilemma, 11. 

 Neuroglia, 12, 

 Neuromeres of brain, 49, 

 Neuropore, 44. 

 Newt, 285. 



Nictitating membrane, 82. 

 Night hawk, 348. 

 Noctilio, 388. 

 Nomarthra, 382. 

 Nondeciduata, 374. 

 Non-elastic tissue, 13, 

 Norway haddock, 259. 

 Nothosaurus, 306. 

 Notidanidae, 238. 

 Notochord, 17, 134. 

 Notochordal sheath, 135. 

 Notodelphys, 287. 

 Nototherium, 380. 

 Nototrema, 287. 

 Notropis, 255. 

 Nycteris, 387. 



Oblique muscle of eye, 84, 



114. 

 Oblique muscles of trunk, 



113- 

 Obturator foramen, 170. 

 Occipital bone, 356. 

 Octodon, 391. 

 Octodontidse, 391, 

 Oculomotor nerve, 61. 

 Odontoblasts, 16, 19. 

 Odontoceti, 408. 

 Odontoholcas, 344. 

 Odontoid process, 143. 

 Odontormss, 344. 

 Odontornithes, 344. 

 CEsophagus, 34. 

 Oil bird, 348. 

 Oil gland, 98. 

 Olecranon process, 360. 

 Olfactory lobe, 52. 



" nerve, 60. 



" organ, j^. 



" tract, 60. 

 Oligobunus, 412. 

 Oligosoma, 320, 

 Omasum, 35. 

 Omentum, 105, 106. 



" gastro-hepatic, 41. 

 Omosternum, 148. 

 Omphalomesaraic vein, 180, 



192. 

 Oncorhynchus, 256. 



Onychodus, 249. 

 Operculum, 23, 161. 

 Ophiderpeton, 283. 

 Ophidia, 322. 

 Ophidiidae, 261. 

 Ophidium, 261. 

 Ophidioida, 261. 

 Ophiocephalida5, 262. 

 Ophisaurus, 320. 

 Ophthalmicus nerve, 61, 62, 

 Opisthocoelous, 139. 

 Cpisthocomi, 349. 

 Opis^hoglypha, 325. 

 Opisthomyzon, 263. 

 Opisthotic, 158. 

 Opoderodonta, 326. 

 Opossums, 379. 

 Optic chiasma, 61. 

 Optic lobes, 50. 

 Optic nerves, 60. 

 Optic stalk, 78. 

 Optic thalami, 49. 

 Optic tract, 61. 

 Optic vesicle, 78. 

 Orang-utan, 416. 

 Orbitosphenoid, 158. 

 Orca, 408. 

 Oreodon, 398. 

 Oreodontidse, 398. 

 Organ of Corti, 73. 

 Organ of Giraldi, 130, 

 Organ of Jacobson, 'jj.. 

 Origin of muscle, 112. 

 Omithopoda, 317. 

 Ornithodelphia, 376. 

 Ornithorhynchidse, 376. 

 Ornithorhynchus, 376. 

 Ornithosauria, 329. 

 Oronasal groove, 76. 

 Orthagoriscus, 267. 

 Orthopoda, 316. 

 Orycteropodidse, 382. 

 Orycteropus, 382. 

 Oryx, 399. 

 Os en ceinture, 278. 

 Os entoglossum, 161. 

 Os lenliculare, 159. 

 Os magnum, 177. 

 Os orbiculare, 159. 

 Os transversum, 163. 

 Oscines, 351. 

 Osmerus, 256. 

 Osphromenus, 262. 

 Ossicula auditus, 158^ 



