INDEX. 



125 



contrivances in, i. 238 ; Mr. 

 Owen's memoir, on, i. 238 ; 

 chambers, act as floats, i. 240 ; 

 siphuncle, its functions and mode 

 of* action, i. 241, 243, 246; si- 

 phuncle, calcareous sheath of, 

 i. 248 ; siphuncle, substance of, 

 i. 248 ; use of air chambers, i. 

 243 ; contrivances to strengthen 

 the shell, i. 244—246; number 

 of transverse plates, i. 246 ; ac- 

 tion of pericardial fluid, i. 247 — 



249 ; like that of water in the 

 water balloon, i. 248 ; its manner 

 of floating, rising 1 , sinking and 

 moving at the bottom, i. 249, 



250 ; opinions of Hook and Par- 

 kinson concerning, i. 250 ; the 

 Author's theory, i. 250. 



Nautilus sypho, intermediate cha- 

 racter of, i. 269—273. 



Nautilus zic zac, intermediate cha- 

 racter of, i. 269—273. 



Nebular hypothesis, consistent with 

 geological phenomena, i. 40. 



Nelson, Lieut., on strata formed 

 by the wind in the Bermudas, i. 

 104. 



Newcastle, plants preserved in coal 

 mines at, i. 344. 



Newhaven, nodules of iron-stone 

 containing fishes and coprolites 

 at, i. 212. 



Newton, his religious views result- 

 ing from philosophy, i. 19, 440. 



Nichol, Mr., observations on fossil 

 pinus and araucaria, i. 364, 365, 

 366. 



Noggerath, professor, chronometer 

 in fossil wood, observed by, i. 

 381. 



Norfolk, remains in crag formation 

 of, i. 79 ; fishes in crag of, i. 217. 



Norland House, Artesian well at, i. 

 420. 



North Cliff, bones in freshwater 

 formation at, i. 79. 



Nummulites, their extent and num- 

 ber, i. 288, 289; functions and 

 structure, i. 289; influence on 

 stratification, i. 289. 



Oberau, granite overlying creta- 

 ceous rocks, at ii. 5. 

 Odier, M., his discovery of chitine, 



1 



or elytrine in wings of insects, i. 

 310. 



Oeland, orthoceratites in limestone 

 of, i. 274; lituite found in the 

 same, i. 275. 



Oeningen, plants of, 382, et seq.; 

 fossil fishes of, i. 203, 217; de- 

 scription of fossil plants at, by 

 Professor Braun, i. 384 — 386; 

 plants in brown coal formation 

 at, i. 382; fossil salamander of, 

 i. 386. 



Ogyges, i. 295. 



Onchus, i. 220. 



Opossum, remains of in secondary 

 and tertiary strata, i. 63; bones 

 of, in oolite at Stonefield, i. 191. 



Organic remains, best summaries of, 

 i. 39; argument from absence of, 

 i. 50 ; general history of, i. 88 ; 

 afford evidence of design, i. 89 ; 

 important inferences from, i. 91; 

 study of, indispensable to geolo- 

 gy, i. 92; successive stages of 

 deposition, i. 94 ; best ground- 

 work of geological divisions, i. 

 94 ; supply deficient links in the 

 existing animal kingdom, i. 94. 



Orodus, i. 220. 



Ornithicnites, in new red sandstone 

 of Connecticut, ii. 40. 



Ornithorhynchus, sternal apparatus 

 like that of ichthyosaurus, i. 142, 

 145 ; Mr. R. Owen's papers on, 

 i. 142. 



Orthoceratite, character and extent 

 of, i. 274. 



Osseous breccia, in fissures of lime- 

 stone, i. 80. 



Osier, Mr., on proboscis of bucci- 

 num, i. 226. 



Owen, Mr., on peculiarities of mar- 

 supialia, i. 64 ; on comparative 

 organization of ornithorhynchus 

 and reptiles, i. 142; on bones of 

 land tortoises, i. 181; on nautilus 

 pompilius, i. 238, 244, 248, 249, 

 251. 



Pachydermata, existing genera of, 



in pliocene strata, i 79. 

 Pain, aggregate of diminished by 



the agency of carnivora, i. 105. 

 Palxotherium, remains of in Cal- 

 1* 



