684 



INDEX. 



Trap, various a^es of, 556, 558. 



, passa.se. of granite into, 564. 



in Eadnorshire, 558. 



rocks, relation to lava, 486. 



rocks, litholosical character of, 522. 



Trappean rocks, 91. 



Trap-tnff, 470. 



Trass in Lower Eifel, 474, 543. 



Travertin, how deposited, 34. 



Tree-ferns in Permian formation, 357. 



Tree-ferns (recent). 362. 



Trias^ or new red sandstone, 332, 333, 835. 



, in Cheshire and Lancashire, 336, 343. 



, subdivisions of, 383. 



Trigonellitefi lattts, oolite, 302. 

 Trigonia caudata, 259; T. gihhosa, 301. 

 Trigonocarpum oUvceforme, T. ovatum, 369. 

 Trigonotreta xindulata^ Permian, 352. 

 Trilobites In Devonian strata, 424 



, metamorphoses of, 444, 450. 



, of lower Silurian, 441, 



Trilocuiiva infiata, eocene, 227. 



Trimmer, Mr., on denudation of "Wealden, 285. 



...., on sand-galls, 82. 



, on shells in drift near Menal Straits, 136, 



Trhiucleus Caractaci, T. concentricics, T. or- 



natiis, 441. 

 Trionyx, fragment of carapace of, 208. 

 Tripoli composed of infusoria, 24. 

 Trochus Anglicus, lias, 39. 

 Trophon clathratum, pleistocene, 130. 

 Tuff, volcanic, and trap, 6, 470. 

 Tuffs on Wrekin and Caer Oaradoc, 553. 

 Tuomey, Mr., cited, 234. 

 Tupaia Tana (recent), jaw of, 311. 

 Turner. Dr., cited, 41, 42. 

 Turrilites costatus, chalk, 246. 

 Turritella mxdtUulcata, Bracklesham, 216. 

 Tuscany, volcanic rocks of, 530. 

 Tynedale fault, 64. 

 Tynemouth Cliff, limestone at, 851. 

 Typhis pungens, 'Bsxton,2lQ. 



Uddevalla, post-pliocene strata at, 119. 



...-, shells of, compared with those near Na- 

 ples, 112. 



Underlying, term applied to gi'anite, 8. 



ITngulite grit of Russia, 443. 



ZFiiio littdralis (recent), 28. 



...., Valde7isis, Wealden, 263. 



United States, coal-field of, 3SS. 



, cretaceous formation in, 254. 



, Devonian rocks of, 426. 



. . . ., Devonian strata in, 426. 



. . . ., eocene strata in, 231. 



. . . ., older pliocene and miocene formations in, 

 180. 



. . . ., oolite and lias of, 330. 



, Silurian strata of, 444. 



Upper greensand, 250. 



Upsala, strata containing Baltic shells near, 129. 



Ural Mountains, gold of, 629. 



Ursus spelceus, tooth of, 167. 



Val di Noto, composition of, 529. 



, igneous rocks of 487. 



inland cliffs in, 76. 



Valleys, origin of, 70. 



, transverse of Weald, 275. 



Valorsine granite, 569. 

 Vali-ata, pleistocene, 29. 

 Veins, mineral. See Mineral veins, 618. 

 Veinstones in parallel layers, 623. 

 Velay, volcanoes of, 552. 

 Veiiericardia planicosta, eocene, 214. 

 Venetz, M., on Al])ine glaciers, 146. 

 Ventriculites radiattis, chalk, 248. 

 Verneuil, M. de, on Devonian of the U. S., 



426. 

 . ..., on horizontal strata in Eussia, 129. 



, on lower Silurian, U. S., 445. 



,..., on Pevtamerus Knightii, 433. 

 ., ,., on Permian flora, 354. 



Vertebrata, fossil, progress of discovery of, 456. 



, not found in lower Silurian, 454. 



Vesuvius, eruption of, 526. 



Vicenza, basaltic columns near, 485. 



Vidal, Capt., survey by, 495. 



Vienna basin, faluns of, 179. 



Virginia. U. S., fossil shells in, 181. 



Viriet, M., on corrosion of rocks by gases, 595. 



. . ., on geology of Morea, c55. 



. . ., on inland cliffs, 73. 

 Volcanic dikes, 6, 426. 



... mountains, form of, 5, 489. 



... rocks, age of, 519. 



. . ., analysis of minerals in, 475. 



..., Cambrian, 559. 



..., composition and nomenclature of, 462. 



, described, 5, 460. 



... of Hungary, 544. 



... of pnst-pliocene period, 523. 



... of Wales, great thickness of, 444. 



..., Silurian, 558. 



..., test of age of, 519, 



. . . tuff, 6. 470. 

 Volcanoes around Olot in Catalonia, 533. 



...,extinct, 6, 530, 543, 545. 



... in Spain, age of, 536. 



, . ., newer, of Eifel, 540. 



... of Auvergne, 545. 



... of Canaries, 494. 



... of Java, 492. 



... of Sandwich Isles, 489. 

 Voltsia Jieterophplla, 835. 

 Valuta amMgua, V. athleta, 213. 

 , , , Lamherti, crag, 172. 



... tatrella, 216; V. nodosa, 218. 

 Von Buch, Baron, cited, 470, 580, 581. 



, . ., on boulders of Jura, 149. 



. . ., on brown-coal, 191. 



. . ., on Canary Islands, 494. 



..., on Cystidese, 439. 



..., on land rising, 45. 



Wacke, or argillaceous trap, 474. 

 Wcdchia prinifonnis, Permian, 356. 

 Wales, ancient glaciers of, 136.* 

 Waller, quoted, 93, 

 Warren, Dr. J. C, on skeleton of Mastodon gi- 



santeus, 144. 

 Waterhouse, Mr., cited, 203, 812. 

 Watt, Mr. C, experiments on fused rocks, 528, 



594. 

 Waves, action of, on limestone, 78. 

 Weald clay, 260. 



Weald valley, denuded at what period, 281. 

 Wealden, term explained, 259. 

 . . . ., the fracture and upheaval of, 280. 



, extent of formation, 264. 



. . . ., plants and animals of, 262, 265. 



Webster, Mr. T., cited, 109, 293, 297. 



Wellington Valley, caves in, 162. 



Wener Lake, horizontal Silurian strata of, 45. 



Wenlock formation, 428. 



...., shale, 437. 



Werner on classification of rocks, 91. 



...., on mineral veiiis, 618. 



, on volcanic rocks, 463. 



Westerwald, igneous rocks of, 538, 540. 

 Westphalia, tertiaries of 178. 

 WestM-ood, Mr., on beetles in lias, 328. 

 Whin-Sil, intrusion of trap between beds at 



the, 48'^. 

 Whinstone, or trap, 474. 

 White chalk, 12, 239. 

 White Mountains, granite-vein in, 574. 

 White sand of Alum Bay, 12. 

 Whitestone. or Eurite, 564. 

 Wigham, Mr., on fossils, near Norwich, 155. 

 Wolverhampton, fo.-sil forcst|fear, 374. 

 Wood, fossil and recent, perforated by Mol- 



lusca, 24. 

 . . . ., from Colebrook Dale, structure of, 369. 

 ....,from the coal, microscopic structure e^ 



40. 



