INDEX. 



791 



Norway, Azoic in, 137. 



iron-mines of, 141. 



Primordial in. 178. 



Trenton in, 207. 

 Norwich Crag, 523. 

 Notamia loricata, 190.* 

 Nothosaurus mirabilis, 437. 



Schimperi, 438. 

 Notidanus primigenius, 277,* 



517. 

 Notornis, 580. 

 Nototherium, 424.§ 

 Noyaculite in Arkansas, 322. 

 Nova Scotia, Carboniferous in, 

 324, 353. 



Clinton in, 235. 



Millstone grit in, 322. 



Niagara in, 238. 



Oriskany in, 266. 



Subcarboniferousin, 309. 



Triassic in, 416. 



uplifts in, 304. 



zeolites of, 430. 

 Nucleocrinus, 274, 303. 



Verneuili, 274.* 

 Nucleolites crucifer, 479, 488. 

 Nucula, 304, 399. 



Cobboldise, 521. 



divaricata, 521. 

 Nullipores, 67 .§ 

 Nummnlites, 164,3 514, 523. 

 526. 



nummularia, 164.* 

 Nummulitic beds, 523. 



limestone, 523. 



Oahu, chalk in, 488, 755. 



map of, 31* 

 Obolella, 184.g 



nana, 187.* 

 Obolus, 184.*g 



Apollinis, 187,* 217* 



Labradoricus, 187. 

 Obsidian, 8S,g 89.| 

 Occident, 13, i4. 

 Oceans, arrangement of, 11. 



depth of; 12. 



trends of, 36. 



relation between the 6ize 

 of, and the heights .of 

 the borders, 23. 

 Oceanic currents, 650, 652, 654, 

 657. 



forces, 650. 



formations, 659. 



movements, system of,39.* 

 Oculina, 163. 



Mississippiensis, 518. 



rate of growth of, 754. 

 Odontidium pinuulatum, 512,* 



631. 

 Odontocephalus selenurus,275. 

 Odontoptens, 338,§ 339, 342, 

 355. 



crenulata, 342. 



Schlotheimii, 339* 

 CEningen, fishes at, 529. 

 Ohio, Carboniferous in, 322. 



Clinton in, 234. 



Hudson in, 218. 



L. Silurian in, 228. 



Millstone grit in, 322. 



mineral oil in, 756. 



Ohio, Niagara in, 238. 



Portage and Chemung in. 

 288. 



Subcarboniferous in, 308, 



Upper Helderberg in, 279. 



uplift in, 228. 

 Ohio River, discharge of, 633. 



River, in the Cretaceous. 

 490. 

 Oil, mineral, 756. 

 Oldhamia antiqua, 194.* 



radiata, 194.* 

 Old Red Sandstone, 294. 

 Olenus micrurus, 194.* 

 Oliva litterata, 521. 

 Olivanites, 274.§ 

 Olivella Alabamensis, 517. 

 Olivine, 60.§ 

 Omuivores, 423.JJ 

 Omphyma turbinata, 263.* 

 Onchus, 264.g 

 Oneida conglomerate, 230. 



epoch, 230. 

 Onondaga limestone, 269. 

 Onondaga salt group, 246. 

 Oolite, 85.§ 



Lower and Upper, 448. 



of Florida reefs, 754. 

 Oolitic epoch, 447. 

 Ootocoids, 423.§ 

 Opal, 55.§ 

 Ophidians, 345.(5 

 Ophileta compacta, 187, 192, 

 193. 



complanata, 192. 



levata, 192 * 

 Ophiolite, 82.3 

 Ophiura, 161.| 

 Opossum. 424.§ 



Eocene, 527. 

 Oracanthus Milleri, 319. 

 Orbicula, 187. 

 Orbis Rotella, 517. 

 Orbitoides, 164.g 



Mantelli, 514, 517. 

 Orbitolina. 472g 483. 



Texana, 470, 474* 

 Orbulina universa, 164.* 

 Orchestia, 151 .*§ 

 Oregon, Cretaceous in, 469. 



Tertiary in, 510, 521. 

 Oreodon Culbertsoni, 519. 



gracilis, 519.* 

 Orient, 13, 14. 



the continent of progress, 

 585. 

 Origination of species. 601. 

 Origin of matter, life, spirit, 

 and of the spiritual ele- 

 ment in tbe earth's ar- 

 rangements, not ex- 

 plained by reference to 

 heat, water, or attrac- 

 tion, 740. 

 Oriskany sandstone, 266. 

 Ormoceras. last of, 214, 259. 



crebriseptum. 224. 



tenuifilum, 213,* 215. 

 Ornithorynchus, 424.? 

 Orodus mamillaris, 315.* 

 Orthis. lS3,*g 191. 



biforata, 216. 



biloba, 240* 261. 



Orthis costalis, 210* 



elegantula, 216.* 242, 261, 

 262. 



Flabellulum, 216* 261. 



grandasva, 191.* 



hybrida, 261. 



Lynx, 213,* 216, 220, 237. 



Michelini, var. Burling- 

 tonensis, 314.* 



occidentalis, 213* 220, 

 245. 



parva, 191. 



striatula, 182,* 216. 



testudinaria, 213,* 220, 

 245. 



tricenaria. 213.* 



Umbraculum, 314, 318* 



varica, 254.* 



last of, 374. 

 Orthisina, 184.g 



festinata, 187. 

 Orthoceras, 156,g 303. 



Acicula, 290* 



aculeatum, 349. 



implicatum, 261. 



junceum, 213.* 



Kickapooense,371. 



Lamarcki, 192. 



laqueatum, 192 * 193. 



moniliforme, 206, 224, 349. 



primigenium, 192.* 



reeti-annulatum, 210. 



tenuiseptum, 210. 



undulatum, 261. 



vertebrale, 213* 



virgatum, 261. 

 Orthocerata, last of, 495. 

 Orthoclase, 56.§* 

 Orthonota curta, 242. 



parallel a, 221.* 



undulata, 284.* 

 Orthopters, 420.g 

 Orycteropus, 423.§ 

 Osborne group, 522. 

 Oscillations of level, cause of, 

 716, 723. 



of water-level, causes of, 

 367, 723. 



through the Paheozoic, 

 389. 

 Osmeroides Lewesiensis, 485.* 



Mantelli, 485. 

 Osmerus, 485. § 

 Ostracoids, 154.g 



first of 193. 



genera of, 399. 



range of, in time, 401. 

 Ostrea, 399. 



acuminata, 464. 



bellovaciua, 524. 



congesta, 474, 478. 



deltoidea, 465. 



distorta, 465. 



divaricata, 516. 



expansa, 465. 



Georgiana, 518.* 



gregaria. 465. 



Knorri, 464. 



Larva, 474,* 479, 487. 



Marshii. 459,* 464, 465,478. 



panda. 516. 



sellajformis. 516.* 



subovata, 478. 



