Nerve or nerves, 264 abducens, 70 accessorius spinalis, 274 acoustic, 271 afferent, 300 alveolar, 270 anterior coraco-brachialis, 284 spinal branches, 281 thoracic, 284 axillaris, 283 brachial plexus, 282 brachialis longus inferior, 284 superior, 283 cells, 280 centers, 30 ciliary, 304 cranial, 265 crural plexus, 285 cutaneous brachialis et inferior brachialis, 284 brachii superior, 283 dorsal spinal, 281 dorsalis plexus, 282 dorso-cutaneous plexus, 283 efferent, 300 ethmoidalis, 269 facialis, 286 function, 300, 301 furcularis, 286 glosso-pharyngeal, 272 hypoglossal, 27, 37, 274 intercostal, 285 ischiadic, 49, 286 latissimus dorsi, 282 lumbo-sacral, 285 median, 284 medullated, 277 motor oculi, 267 neurolemma, 277 non-medullated, 277 obturator, 286 olfactorius, 34, 265 optic, 267 patheticus, 268 peroneus profundus, 287 plexus pedundus, 288 pneumogastric, 273 posterior coraco-brachialis, 284 ramus secundus, 269 recurrent cardiacus, 274 externa, 269 hepatici, 274 infra-orbitale, 269 laryngeus, 274 linguales, 273 pharyngeus, 272 pulmonale, 274 subcutaneous, 270 ventralis, 281 rhomboideus profundus, 282 superficialis, 282 scapulo-humeralis, 282 serratus plexus, 282 spinal cord, 275 sterno-coracoideus, 284 subcoraco-scapularis, 282 superficialis peroneus, 287 serratus, 282 supra-coracoideus, 283 trifacial, 31, 268 ulnar, 284 vagus, 27, 31, 273 group, 273 Nerve trunks, structure of, 277 Nervous system, 264, 300 Neural arch, 38 spines, 38, 39 Neurofibrils, 280 Neurones, 268, 279 Nostril, 193 Notocord, 322 Oblique process, 39 Obliquo-transversales muscle, 86 Obliquus abdominis externus muscle, 90 internus muscle, 91 dorsalis, 125 inferior, 127 superior, 125 ventralis muscle, 121 Obturator externus, 116 internus, 116 nerve, 286 Occipital artery, 215 bone, 23, 25 Occipitale laterales bone, 25 Occipitalis inferius bone, 25 profunda artery, 215 sublimis artery, 215 superioris bone, 25 Odontoid process, 37 Oil gland, 41 Olecranon, 46 Olfactory cavities, 322 cerebral crura, 295 glomeruli, 265 nerve, 265 Oögenesis, 319 Ophthalmic vesicle, 322 Ophthalmica externa, 216 Optic chiasm, 289 lobes, 322, 289 nerve, 267 Orbicularis oculi, 124 palpebrarum muscle, 124 Orbit, 323 Orbital process, 30 Orbito-nasal ganglion, 270 Organ of hearing, 304, 322 of sight, 303 of smell, 307 of taste, 307 of touch, 307 Os angulare, 30 articulare, 30 transversale, 105 Osseous structure, 17 tissue, 17 Ostium tubæ abdominale, 183 Otocrane, 323 Otoliths, 322 Ovarian artery, 226 pocket, 189 Ovary, 325 Oviduct, 182, 325 Ovum, 318 Palatal papillaries, 141 Palatine glands, 141