796 



INDEX. 



Nova Scotia, fossil forests of, 484. 



period of coal accumulation in, 491. 



Nucula Cobboldice, Norwich crag, 197. 

 Nummulites (Nummtdarid) laevigata, 2S9. 



exponens, Europe and Asia, 30S. 



Pusehi, Pyrenees, 308. 



Nummulitic formations, 308. 



Nyst, Mr., on testacea in Antwerp crag, 207. 



on Edeghem shells, 234. 



Oboltjs grit of Eussia, 568. 



Apollinis, Silurian, 569. 



Obsidian, 606. 



Ocellaria radiata, 329. 



(Eningen, Upper Miocene beds of, 248. 



Oeynhausen, M. von, on Cornish granite veins, 

 713. 



Ogygia Buchii, Silurian, 566. 



Ohio, Tails of, Devonian coral-reef of, 544. 



Old Eed, supposed reptilian remains of, 530. 



Old Eed Sandstone, subdivisions of, 524. 



thickness of, 524. 



trap of, 698. 



Oldest granites, 726. 



Oldhamia radiata, O. antiqua, 579. 



Olenus micrurus, Lingula flags, 577. 



Oligoclase, composition of, 595. 



Oliva Dufresnii, Bolderberg, Belgium, 236. 



Oliver, Prof., on Miocene Atlantis, 270. 



Olivine, 598. 



Olot, volcanic rocks of, 666. 



Omphyma iurbinatum, Wenlock, 557. 



Onchus tenuistriatus, Silurian, 552. 



Oolite, origin of, 429. 



divisions of, compared, 414. 



Great, fossils of, 402. 



— - — Great, fossil plants of, 411. 



Inferior, fossils of, 412. 



plutonic rocks of, 723. 



— - physical geography of, 378. 



table of divisions of, 377, 378. 



term defined, 12. 



upper, middle, and lower, 378. 



Oolitic strata of England and Prance, 378. 

 volcanic rocks, 696. 



OpJiioderma Egertoni, Middle Lias, 420. 

 Ophite, Ophiolite, 606. 



Opossum, molar tooth and part of jaw of, 294. 

 Oppel, M., on zones of Lias, 416. 

 Orbigny, A. d', on Orbitoides, 309, 311. 



on cretaceous series, 314. 



on distinction of species, 215. 



on Vienna basin, 244. 



Orbigny, M. C. d', on pisolitic limestone, 314. 



Oreodaphne Heerii, 210. 

 Organic remains, criterion of age of formation 

 of, 93. 



tests of age of volcanic rock, 656. 



Oriskany sandstone, classification of, 544. 

 Ormerod, Mr., on thickness of Trias, 44. 

 Orthis elegantula, Upper Ludlow, 553. 



tricenaria, O. vespertilio, O. grandls, 



Silurian, 563. 

 Orthoceras. in St. Cassian beds, 437. 

 Orthoceras ventricosum, 554. 



laterale, 520. 



duplex, Silurian, 566. 



Ludense, fragment of, 555. 



Orthoclase, composition of, 595. 

 Osborne, or St. Helen's series, 284. 

 Osteolepis, Old Eed Sandstone, 533. 

 Ostrea gregarea, Coral-rag, 399. 



acuminata, Puller's earth, 412. 



carinata, Chalk, 328. 



columba, Chalk, 328. 



deltoidea, Upper Oolite, 395. 



distorta, Purbeck, 380. 



expansa, Portland-stone, 395. 



vesieularis, Chalk, 328. 



Otodus obliquus, tooth of, 290. 



Overlying, term applied to volcanic rocks, 7. 



Owen, Prof., on Eocene mammalia, 387. 



on carboniferous limestone, 523. 



on cave-breccia fossils, 126. 



■ on fauna of Sheppey, 292. 



Owen, Prof., on footsteps on Potsdam sand- 

 stone, 582. 



on footprints of Trias, 445, 455. 



on Gastornis Parisiensis, 306. 



on Ichthyosaurus, 424. 



■ on Palssophis typhosus, 239. 



on Plagiaulax, 384. 



on Purbeck mammalia, 382. 



on reptile of Coal, 506. 



on Triconodon, 385. 



on Stonesfield mammalia, 407-409. 



on Zeuglodon, 310, 311. 



Ox, common, molar of, 135. 

 Oxford clay, fossils of, 400. 



Pacific, corals and chalk of, 318. 



Palcechinus gigas, Mountain Limestone, 517. 



Palceoniscus (Palazothrissum), 461. 



comptus, P. elegans, P. glaphyrus, 462. 



Palaeontology of cretaceous recks, 344. 



term explained, 100. 



PalcRopliis typhosus, Bracklesham, 289. 



Palaiosaurus platyodon, tooth of, 447. 



Palceotherium magnum, 283. 



Palaeozoic type of corals, 515. 



Palagonite tuff, 603, 606. 



Palermo, caves near, 74. 



Palma, aqueous erosion in, 637. 



denudation of fluviatile or marine, 640. 



caldera of, 629. 



structure of, 628-631. 



Paludina, fossil, of Auvergne, 226. 



— — lenta, Hempstead, 29, 240. 



Mayence, 243. 



orbicularis, Bembridge, 282. * 



Paradoxides Bohemicus, 580. 



Parasmilia centralis, Chalk, 515. 



Paris basin, tertiaries of, 298. 



Parka decipiens, 528. 



Parkinson, Mr., on Suffolk crag, 183. 



Parrot, Dr. P., on salt-lakes of Asia, 449. 



Patagonia, sedimentary layers of, 754. 



ground-plan of dikes near, 666. 



Patella rzigosa, Great Oolite, 405. 



Peach, Mr. O, Scotch Devonian fossils found 

 by,. 531. 



Peak of Teneriffe, view of, 644. 



Pearlstone, 606. 



Peat of Denmark, 109. 



Pebble-beds of Lower Miocene, Switzerland. 



259. 

 Pebbles, absence of, in granite, 729. 



in Chalk, 323. 



Pecopteris lonchitica, Carboniferous, 468. 

 Pecten islandicus, Clyde drift, 153. 



Beaveri, White Chalk, 327. 



papyraceus, Coal, 495. 



quinque costatus, White Chalk, 327. 



jacobasus, Sicily, 194. 



Valoniensis, Trias, 441. 



Pegmatite, 704. 



Penarth beds, 442. 



Pengelly, Dr., on flint-knives of Brixham cave 



124. 

 Pengelly, Mr., on Bovey Tracey lignite, 241. 

 Pentacrinus Briareus, Lias, 420. 

 Pentamerus beds, 560. 

 Pentamerus Knightii, Aymestry, 554. 



latvis, 561. 



obldngus, 561. 



Pentland Hills, volcanic rocks of, 699. 



Pentuan, human skulls at, 109. 



Peperino, 606. 



Peperinos of Gergovia, 693. 



Pepys, Mr., cited, 41. 



Period of Weald denudation, 369. 



Permian group, 458. 



flora, 463. 



Perna Mulleti, 343. 

 Petherwyn group, fossils of, 537. 

 Petrifaction of fossil wood, 39. 



process of, 43. 



Petrosilex, 606. 



Phacops latifrons, Devonian, 537 



caudatus, Silurian, 559. 



