654 



INDEX. 



Mysis Fabricii, i. 289. 

 Mytilus, i. 222. 

 Myxine, i. 407,416; ii. 116, 

 497. 



Nacreous structure, i. 231. 



Nais, ii. 102, 251,479,586. 



Narwhal, i. 56; ii. 14L 



Nature, i. 6, 13. 



Nautilus, i. 242, 266 ; ii. 270. 



Necrophorus, ii. 413. 



Needles in biliary ducts, ii. 219. 



Nemazoaria, i. 156. 



Nepa, ii. 384. 



Nereis, i. 271, 274, 280; ii. 



251. 

 Nerve, i. 36 ; ii. 366. 

 Nervous system, ii. 365, 537, 



553. 

 Nervous power, ii. 354. 

 Nettle, ii. 47. 

 Neuro-skeleton, i. 366. 

 Neuroptera, i. 351. 

 Newport, i. 352; ii. 102, 214, 



218, 244, 547, 548. 

 Newt, ii. 439, 587. 

 Nightshade, ii. 59. 

 Nitrogen, ii. 14, 338. 

 Nordmann, ii. 600, 608. 

 Notonecta, i. 29, 337. 

 Nursling sap, ii. 24. 

 Nutrition, ii. 1, 10, 13, 57. 

 Nutrition in lower orders, ii. 74. 

 Nutrition in higher orders, ii. 



104. 

 Nutritive functions, i. 38. 

 Nycteribia, ii. 483. 



Octopus, i. 261 ; ii. 494. 

 Ocular spectra, ii. 530. 

 Odier,'u 318. 



(Esophagus, ii. 101, 107, 176. 

 Oken, i. 349, 400. 

 Olfactory nerve, ii. 396. 

 Olfactory lobes, ii. 556. 

 Olivee, i. 241, 250. 

 Oniscus, ii. 544. 



Onocrotalus, i. 556. 

 Operculum of Mollusca, i. 252. 

 Operculum of fishes, ii. 303. 

 Ophicephalus, ii. 307, 

 Ophidia, i. 447. 

 Ophiosaurus, i. 454, 457. 

 Ophiura, i. 212. 

 Opossum, ii. 136, 598. 

 Optic axis, ii. 503. 

 Optic ganglion, ii. 489. 

 Optic lobes, ii. 555. 

 Opuntia, i. 127. 

 Orache, ii. 48. 

 Orbicular bone, ii. 426. 

 Orbicular muscle, i. 136. 

 Orchidese, i. 69. 

 Organic Mechanism, i. 59, 96. 

 Organic developement, ii. 599. 

 Ornithorhynchus, i. 395 ; ii. 



136, 178, 391,442,497. 

 Orobanche, ii. 54. 

 Orthoceratite, i. 267. 

 Orthoptera, i. 309, 349. 

 Os hyoides, ii. 132, 303. 

 Osier, i. 206, 220, 223, 277, 



280. " 

 Osseous fabric, i. 365. 

 Ossicula, tympanic, ii. 426. 

 Ossification, i. 375, 556. 

 Ostracion, i. 432. 

 Ostrich, i. 563, 587, 590; ii. 



185,224,328,554. 

 Otter, sea, ii. 149. 

 Ovary, ii. 593, 594. 

 Oviduct, ii. 596. 

 Oviparous animals, ii. 597. 

 Ovo-viviparous animals, ii. 597. 

 Ovula, i. 247. 

 Ovum, ii. 593. 

 Owen, i. 563', ii. 274, 413. 

 Owl, ii. 330,441,503. 

 Ox, horn of, i. 515. 

 Oxygen, ii. 29. 

 Oyster, i. 131, 220,221. 

 Oyster-catcher, ii. 131. 



Paces of quadrupeds, i. 492. 



