522 



INDEX. 



(Esophagus, 299, 398, 431, 433, 441 



445, 447, 448, 463. 

 Olecranon, 149, 150, 165, 167, 168. 

 Olfactory angle, 92, 135, 136. 



lobe, 369, 375, 377, 379, 382, 384. 



nerve, 368, 369, 380, 390. 



organ, 380. 

 Olivary body, 367. 

 Omentum, 458, 459. 

 Omohyoid muscle, 287, 288, 313, 315 



3 X 7- 



Omosternum, 147, 160, 161. 

 Omphalo-meseraic veins, 423, 425. 

 Oolite, bird of the, 18. 

 Opah Fish (a Teleostean), 159, 194. 

 Opening of external auditory meatus, 



Operculum, 103, 476. 



muscles of, 319. 

 Opetiorhynchus (a Carinate Bird), 



trachea of, 470. 

 Ophidia, 18. 

 Ophiodes (a Saurian), 187, 188, 199, 



203, 204, 210, 212. 

 Ophiomorpha, 19. 



lungs of, 464. 



trachea of, 468. 

 Ophthalmic artery, 413. 



nerve, 391. 



Opisthoccelous vertebrae, 39. 

 Opisthotic, 8 1, 100, 106, 227. 

 Opossums, alimentary canal of, 448. 



limb-bones of, 212. 



mammary glands of, 489. 



muscles of, 343, 353, 356. 



skull of, 105, 122, 137. 



spine of, 43, 50. 



teeth of, 260. 



Opponens digiti minimi muscle, 296, 

 297, 336 



nallucis muscle, 359. 



muscles, 362. 



pollicis muscle, 294, 296, 297, 336. 

 Optic commissure, 369. 



foramen, 76, 82, 108, no, 137. 



lobes, 382 385. 



nerve, 83, 368, 371, 384, 387, 390. 



nerves, chiasma of, 285. 



thalamus, 373, 374, 378, 390. 



tracts, 369, 387. 

 Orang, 15. 



larynx of, 474. 



limb-bones of, 169, 197, 201, 207, 

 212. 



mouth of, 435. 



muscles of, 332, 356, 359, 362. 



skull of, 1 1 6, 132. 



spine of, 50, 66. 



thyroid gland of, 484. 



tongue of, 441. 

 Orbicularis oris muscle, 283, 285. 



palpebrarum muscle, 283, 284, 309. 



Orbital muscles, 310. 



plate of frontal, 90. 



plate of sphenoid, 109. 



wings of sphenoid, 82, 83, 90. 

 Orbi to-sphenoid, 98, no, 130, 227. 

 Orbits, 76, 138. 

 Order, 5. 

 Organic world, 5. 

 Organisms, 5. 

 Organs of man's body, 21. 



of sense, 365. 

 Origin of muscles, 281. 

 Ornithodelphia, 18. 



ureters of, 482. 

 Ornithorhynchus, 18. 



alimentary canal of, 449, 460. 



brain of, 366. 



cutaneous glands of, 487. 



exo-skeletcn of, 247. 



glands of, 438. 



larynx of, 473. 



limb-bones of, 197, 199, 201, 203, 

 206 208, 211, 220. 



lungs of, 464. 



mammafy glands of, 489. 



mouth of, 435, 436. 



muscles of, 339, 342, 354. 



skull of, 100, 115, 136, 137. 



spine of, 48. 



spleen of, 484. 



stomach of, 445. 



tongue of, 441. 

 Orycteropus, 17. 



teeth of, 276, 277. 

 Os articulare, 396. 



calcis, 186, 204, 205. 



cloacae, 195. 



en ceinture, 100, 112. 



femoris, 177. 



hyoides, 87, 123, 125, 286, 429, 434, 



. 471,473- 



innommatum, 177 180. 



magnum, 150, 151. 



planum, 84. 



quadratum, 103, 104, 108, 119, 120.' 



transversum, 121, 131, 227. 

 Osseous Fishes, auditory organ of, 

 395- 



exo-skeleton of, 277. 



gills of, 479. 



respiration of, 478. 



skull of, 101, 108, in, 120, 121, 

 124, 139, 144, 159. 



spine of, 59. 

 Ossification, 23. 



of epidermis, 239. 



of skull, 95. 



of spine, 61. 

 Osteoglossum (a Teleostean Fish), 



teeth of, 257. 

 Ostracion (a Teleostean Fish), 20. 



muscles of, 362. 



