654 



INDEX. 



Musical tone, ii. 419. 

 Mya, i. 223. 



Myriapoda, i. 297, ii. 248. 

 Myrmecophaga, ii. 134. 

 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. 141. 

 Nature, i. 6, 13. 

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

 Necrophorus, ii. 413. 

 Needles in biliary ducts, ii. 219. 

 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,\. 318. 



(Esophagus, ii. 101, 107, 176. 

 Oken, i. 349, 400. 

 Olfactory nerve, ii. 396. 

 Olfactory lobes, ii. 556. 



OHvse, 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. 

 Ornithorhyncus, 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. 

 Owl, ii. 330,441,503. 

 Ox, horn of, i. 515. 

 Oxygen, ii. 29. 

 Oyster, i. 131, 220, 221. 

 Oyster-catcher, ii. 131. 



