GENERAL INDEX. 



Ocean, effect of animal life at the bottom of the ocean on 



the economy of the world, iv. 38. 

 absolute darkness of the, at the depth of 800 to 1000 



feet, iii. 204. 

 Oceanic nations, mental and physical characteristics of the, 



iv. 136}. 



variety in the complexion of the, iv. 1334. 

 Ocelli, or simple eyes, of Insects, ii. 961. 



in Arachnidans, i 207. 



Occipital artery, i. 367. 487. 748 ; ii. 542. 556. 

 bone, i. 731. 



anterior angle, i. 731, 732. 

 connexion, i. 733. 

 development, i. 731. 

 lateral angles, i. 732. 

 superior angle, i. 732. 

 basilar process of the, i. 726. 

 muscle, i. 747, 748. 

 nerve, great, iv. 751. 

 protuberance, internal, i. 732. 

 ridge, inferior, i. 732. 

 superior, i. 732. 

 sinuses, iii. 6~29. 

 sulcus, i. 732. 734. 

 tubercle, external, i. 732. 

 vein, iv. 1405, 1406. 

 ventricle, iii. 674. 

 Occipito-frontal region, i. 746. See CRANIUM, regions and 



muscles of. 



muscle, i. 732. 747. 749. 

 Occiput, \. 725. 

 Oclopoda, i. 520. 



divisions of the tribe, i. 521. 

 parasitic nature of the, i. 54i, 545. 

 Octopus vulgaris, its mode of creeping on the shore, iii. 



MS. 



eyelids of the, iii. 95. 

 Ocular conjunctiva, iii. 83. See Conjunctiva. 



peduncles of Crustacea, i 758. 



OcA>-cerebral congestion, a cause of myopia, iv. 1464. 

 Ocythoe, genus of Testacea, i. 523. 

 Odontoid ligament, i. 732. 

 Odontoliths, or tartar, of teeth, iv. 83. 

 Odorous emanations, hypotheses of the nature of, iv. 697, 



rsa 



(Ecistes, a gfnus of Rotifera, iv. 4C2. 

 CEcistina, a family of Rotifera, iv. 401, et seq. 

 characters of the family, iv. 401. 

 genera of, iv. 402. 

 (Edema, i.516; iii. 82. 85. 

 (Egosceiidte, a sub-order of Mammalian quadrupeds, 8. 



508. 



anatomical characters of, s. 508, et seq. 

 CStopAageal arteries, i. 193; s. 326. 



branches of ncrvus vagus, iii. 895. 901. 

 nerves, ii. 3. 

 plexus, left, iii. 889. 



right, iii. 889. 



(EaoPBAQlS, i. 11 ; iii. 758 ; iv. 816, 817. 

 definition, iii. 758. 

 normal anatomy, iii. 758. 

 dimensions, iii. 758. 

 directions, iii. 7;",8. 

 mucous membrane, iii. 759. 

 cesophageal glands, iii. 75'J. 

 relations, iii. 758. 

 cervical, iii. 758. 

 thoracic, iii. 758. 

 abdominal, iii. 758. 

 structure, iii. 758. 

 vessels and nerves, iii. 759. 



ce.sophageal branches of the nervus vagus, iii. 



895. 



motor influence of the sympathetic in refer- 

 ence to the oesophagus, s. 46 K 

 function of the oesophagus, iiL 759. 



uses of, in digestion, ii. 8. 

 abnormal anatomy, iii. 760. 



congenital malformation, iii. 760. 

 acquired malformation, iii. 760. 

 structural changes, iii. 761. 

 stricture, iii. 761. 

 morbid growths, iii. 761. 

 calculi of the, iv. 83. 



surgical anatomy of the oesophagus, iii. 576. 

 cesophagolomy, iii. 576. 

 oesophagus of fishes, iii. 981. 



of Kuminantia, s. 5-i5. 

 (Estrid<, or gad-flies, ii. 867. 

 (Estrus, ii. 127. 

 Offence .and defence, instincts designed for the purposes of, 



iii. 7. 



Oil, nutritive properties of, ii. 13. 

 Oil-beetles (Cantharidae), ii. 863. 

 Old age. See AGE. 



Operation process, i. 217; ii. 63. 66. 162. 

 surfaces, ii. 162. 

 structure, ii. 163. 

 fractures, ii. 169. 

 Oleophosphoric acid, iii. 587. 

 Olfactory apparatus, in infancy, i. 73. 

 in old age, i. 80. 



Olfactory nerve, or olfactory lobe of the brain, iii. 625. 707. 



731 ; iv. 698. 



posterior, or pyramid, iii. 731. 

 anterior, or bulb, iii. 731. 

 middle, or proper trunk, iii. 731. 

 roots, iii. 625. 731. 



tractus olfactorius, trunk, iii. 732. 

 bulb, iii. 732. 

 branches, iii. 732 

 septual, iii. 732. 

 labyrinthic, iii. 733. 

 peripheral expansion of the, iii. 697. 

 process, or lobe, iii. 597. 698. 722 N. 



convolutions which enclose the fissure of the, iii. 



oa 



sulcus, iii. 668. 

 See also NOSE ; SMELL. 

 Olivary bodies, ii. 270 ; iii. 679. 683. 684. 722 O. 



corpus dentatum of, iii. 683, 684. 

 process, i. 728. 

 tracts, or fasciculi innominati of Cruveilhier, iii. 678, 



679. 

 Omasum, psalterium, manyplies or feuillet (third stomach), 



of Kuminantia, ii. 11 ; s. 537. 

 Oiiiciitum, i. 57. 



greater, or gastro-colic, i. 502; iii. 937, 938. 941. 8. 



309. 



sac of the, iii 938. 

 layers of, iii. 941. 

 vessels and nerves of, iii. 942. 

 use of, iii. 942. 

 horology of, iii. 942. 

 lesser, iii. 941. 



layers of, iii. 941. 

 vessels of, iii. 941. 

 use of, iii. 941. 

 splenic, iii. 941. 



ligaments of, iii. 941. 

 use of, iii. 941. 



gastro-splenic, iv. 771 ; s. 309. 

 gastro-hepatic, or small, s. 309. 

 phreno-gastric, s. 309. 

 hernia of, ii. 763. See HERNIA. 



condition of the omentum in cases of umbilical 



hernia, ii. 763. 

 Omichmyle, iv. 1270. 

 Owo-clavicular space, iv. 817. 

 0/wo-hyoid muscle, i. 483 ; iii. 105. 563. 

 action and relations, iii. 563. 

 branch of ninth pair of nerves, iii. 721. 

 Owz/>Aa/o-enteritic duct, s. 401. 

 0//>Aa/0-mesenteric artery, i. 169. 

 Onagga, or Dauw (Equus montanus), the, iv. 714. 

 Ondatra, anatomy of the, iv. 370, et seq. 

 Onyx or hypopion, ii. 203. 

 Opacity and transparency of bodies, iv. 1433. 

 Opalina, digestive organs of, 8. 295, 

 Ophidia, an order of Kept ilia, iv. 265. 272, et seq. 

 ciliary motion in, i. 631. 

 digestive organs of, s. 301. 

 teeth of, iv. 888. 

 tongue of, iv. 1147.' 



organs and mode of progression of the, iir. 445. 

 organs of respiration of, s. 281. 

 muscular system of, iii. 543. 

 pancreas of Ophidia, s. 95. 

 thymus gland of, iv. 1098. 

 vocal organs and voice of, iv. 1502. 

 Ophiuri, muscles of the, iii. 537. 

 Ophrydinidce (Ipricated bell animalcules), a family of Poly- 



gastric animalcules, iv. 4. 

 characters of the family, iv. 4. 

 Ophryocercinidte (swan animalcules), a family of Polygastric 



animals, iv. 5. 



characters of the family, iv. 5. 

 Ophthalmia, catarrhal, causes of, iii. 86. 94. 



Egyptian, causes of, iii. 86. 

 Ophthalmic artery, i. 491 ; ii. 179. 186. 227 ; iii. 93. 733.785. 



branches, i. 491, 402. 730. 

 nerve, ii. 279 ; iii. 93 ; iv. 621. 

 branches, ii. 279282. 

 See FIFTH PAIK OF NERVES. 

 ganglion, ii. 281. 

 pustula, ii. 176. 



tentacles of Cephalopoda, i. 526. See CEPHALOPODA. 

 vein, ii. 228; iii. 786. 

 cerebral, iii. 94. 

 facial, iii. 94. 



Opiothrvc fragilis. ovum of, s. [126.] 

 Opisthotunos, i. 719. 

 Opium, effect of large doses of, on the action of the heart, 



i. 797. 

 its peculiar influence upon the spinal cord, iii. 



721 H. 



O*f fiXfteu, or laserpitium, iv. 862. 

 Opossums, iii. 261, et seq. 



habits, peculiarities, &c. of, iii. 261. 

 pelvis of, s. 160. 



organs of voice of the, iv. 1491. 

 Flying, or Petaurists, iii. 263, et seq. 

 pigmy, iii. 257- 

 Virginian, iii. 257. 



3 ii 3 



