422 



INDEX. 



combe, 11 — eccentricities of forma- 

 tion, (fee. among, 55 — dredging for, 

 92 — charms of, 42. 



Marine species, various eflfects of light 

 on, 244. 



spider, the, 213. 



zoology, attractions of, 4. 



Maternal instinct, influence of animal 

 heat on, 251. 



Maury, Lieutenant, on the influence of 

 Molluscs on oceanic currents, .377. 



Medusaj, vitality of detached portions 

 of the, 60 — identity of, and the Po- 

 lypes, 339 — fishing for, 343 — are they 

 susceptible of pain ? 347 et seq. 



Meissner on granular nerves, 397 et seq. 



Mermis, gi'anular nerves in the, 397, 

 398, 399 note. 



Meserabryanthemum, the, 13 — ^left dry 

 by the ebb, 132. See also Anemone. 



Microscope, employment of the, 36 — 

 its value and uses, 38 — errors con- 

 cerning it, 39 — considered as a new- 

 sense, 57. 



Milne-Edwards on the blood of Anne- 

 lids, 70 — on alternation of genera- 

 tions in the Ascidians, 304 — on the 

 oyster, 357 — on the relation of func- 

 tion to organ, 408. 



Mind, eff'ect of the study of nature on 

 the, 57, 412. 



Moleschott, the experiments of, on the 

 relations of light and life, 249. 



Molgula arenosa, 96. 



Molluscs, general partiality of, for dark- 

 ness, 22 — habitations of, and those of 

 men, 33— the shells of, 261— Parthe- 

 nogenesis among, 308 — insensibilty 

 of, to pain, 349 — powers of endurance 

 in, 355 — the so-called eyes of, 358, et 

 seq., 370 et seq. — the hearing of, 372 et 

 seq. — their shells, 375 et seq. — nervous 

 system of, 390 et seq. 



Mormon preacher, <fec., a, 103. 



Morte stone, the, at Ilfracombe, 83. 



Moths, Parthenogenesis among, 307. 



Motion, relations between, and life, 61. 



Mulder on the gi-een of leaves, 245. 



Mliller, Memoir by, on the sounds made 

 by fish, 253. 



Mliller and Gegenbaur, observations on 

 granular nerves by, 397. 



Muscle and nerve, analogous develop- 

 ment of, 401. 



Muscular tissue, assumption as to, in 

 the Annelids, 73. 



Muscularity, contractility apart from, 

 389. 



Myriana, gemmation of the, 64. 



Nais, the gemmation of the, 64 — al- 

 leged paralysing power of the Hydra 

 on it, 142, 144. 



Nais proboscidea, gemmation of the, 68. 



Naked-eyed Medusse, the, 343. 



Nature, eftect of study of, on the mind, 

 57, 412. 



Nemertes Borlasia, the, 236. 



Nereis, peculiarity in the, 117. 



Nerine, extraordinary adventures of 

 the crew of the, 236. 



Nerve and muscle, analogous develop- 

 ment of, 401 — stages of development 

 in diff"erent orders, 402. 



Nerves, sensations where they are in- 

 visible, 371 — sensibility manifested 

 without, 404. 



Nerve-fibres, and cells, alleged distinc- 

 tion between, 392 — supposed depen- 

 dence of nerve-action on, 394 et seq. 

 — function of the, 400. 



Nerve-force, and action, relations of, to 

 nerve-fibres, 394 — not conducted by 

 fibres alone, 399. 



Nervous system, connection of sensi- 

 bility to pain with the, 350 — sensi- 

 bility apart from the, 389. 



Nervous tissue, assumptions as to, 74 

 — is it ever diflused? ib. — constitu- 

 tion of, 400. 



Noctilucpe, the, 344, 345. 



Nudibranchiates, respiration in the, 112 

 — structure, &c. of the eye in, 352 

 et seq. 



Nutrition, as a function of life, 61, 62. 



Nymphon gracile, the, 2l3. 



Observation, value of, to the Natural- 

 ist, 36. 



Ocean-currents, influence of Molluscs 

 on, 377. 



Ophidium, rapid death of, out of water, 

 355. 



Orange-tentacled and disked Anemones, 

 the, 83— their identity, 150. 



Orbigny on the colour-specs of the 

 Loligo, 99. 



Organ, relations of, to fimction, 62, 408 

 et seq. 



Organic labour, progressive division of, 

 407. 



Organisation, relations of light to, 246. 



Ova of the Eolis, &c., peculiarities of 

 the, 259, 260. 



Ovaries, discovery of, in the Actiniae, 

 170. 



Owen, Professor, on the Boring Mol- 

 luscs, 88 — on the Eolis, 115 — on the 

 paralysing power of the Hydra, 142 

 — on the urticating cells, 156 — on the 

 digestive organs of the Pleurobran- 

 chus, 258 — his "Parthenogenesis," 

 298 — on the generation of the Aphis, 

 302 — his lectures on Parthenogenesis, 

 305 — his theory of Parthenogenesis, 

 318 et seq. — examination of it, 321 et 

 seq — on the identity of gemmation 

 and generation, 326-^on pain in the 

 lower animals, 349 — on the eye of 

 invertebrates, 368 — on the colouring 

 matter in the ganglia of the Doris, 

 391. 



Oyster, preservation of the, out of 

 water, 357. 



