684 



INDEX. 



Trap, various ages of, 556, 559. 



, passage of granite into, 564. 



.... in Radnorshire, 558. 



.... rocks, relation to lava, 4S6. 



rocks, lithological character of, 522. 



Trappean roeks, 91. 



Trap-tuff, 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, 335. 



, in Cheshire and Lancashire, 336, 343. 



, subdivisions of, 833. 



Trigonellites latus, oolite, 302. 

 Trigonia caudata, 259; T. gibbosa, 301. 

 Trigonocarpum olivce/orme, T. ovatum, 369. 

 Trigonotreta undulata, Permian, 852. 

 Trilobites in Devonian strata, 424. 



, metamorphoses of, 444, 450. 



, of lower Silurian, 441. 



Triloc.ulina inflata, eocene, 227. 



Trimmer, Mr., on denudation of Wealden, 2S5. 



, on sand-galls, 82. 



, on shells in drift near Menai Straits, 136. 



Trinucleus Caractaci, T. concentricus, T. or- 



natus, 441. 

 Trionyx, fragment of carapace of, 203. 

 Tripoli composed of infusoria, 24. 

 Troclius Anglicm, lias, 89. 

 Trophon clathratum, pleistocene, 130. 

 Tuff, volcanic, and trap, 6, 470. 

 Tuffs on Wrekin and Caer Carndoc, 55S. 

 Tuomey, Mr., cited, 234. 

 Tupaia Tana (recent), jaw of, 311. 

 Turner, Dr., cited, 41, 42. 

 Turrilites costatus, chalk, 246. 

 TurriteUa mvUisulcala, Bracklssham, 216. 

 Tuscany, volcanic rocks of, 530. 

 Tynedale fault, 64. 

 Tvnemouth Cliff, limestone at, 351. 

 Typhis pungens, Barton, 218. 



Uddevaixa, post-pliocene strata at, 119. 



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

 ples, 112. 



Underlying, term applied to granite, 8. 



Ungulite grit of Russia. 443. 



Unto littoralis (recent >, 28. 



. . . ., raldemis, 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, 



ISO. 



, oolite and lias of, 830. 



, Silurian strata of, 444. 



Upper greensand, 250. 



Dpsala, strata containing Baltic shells near, 129. 



Ural Mountains, gold of, 629. 



Ursut spekeus, tooth of, 167. 



Val pi Noto, composition of, 529. 

 . . . ., igneous rocks of. 4S7. 



, inland cliffs in, 76. 



Valleys, origin of, 70. 



transverse of Weald, 275. 



Valorsine granite, 569. 

 Talcatit. pleistocene. 29. 

 Veins, mineral. See Mineral veins, 618. 

 Veinstones in parallel layers, 623. 

 Velay, volcanoes of, 552. 

 Venerioardia planioosta, eocene, 214 

 Venetz. M.. on Alpine glaciers, 146. 

 Ventriculites raaiatue, chalk, 24S. 

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



426. 

 . . . ., on horizontal strata in Russia, 129. 



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



, on Penta merits £'nig?itii, 438. 



.. .., on Permian flora, 854. 



Vertebrata, fossil, progress of discovery of, 456. 



. . . . , not found in lower Silurian, 454. 



Vesuvius, eruption of, 526. 



Vieenza, basaltic columns near, 4S5. 



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, 555. 



. . ., on inland cliffs, 73. 

 Volcanic dikes, 6, 426. 



. . . mountains, form of, 5, 4S9. 



. . . rocks, age of, 519. 



. . ., analysis of minerals in, 475. 



..., Cambrian, 559. 



. . ., composition and nomenclature of, 462. 



. . .., described, 5, 460. 



... of Hungary, 544 



. . . of post-pliocene period, 523. 



... of Wales, great thickness of, 444 



..., Silurian, 558. 



..., test of age of, 519. 



... tuff, 6, 470. 

 Volcanoes around Olot in Catalonia, 583. 



. . ., 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, 4S9. 

 Volfeia heterophylla, 335. 

 Voluta ambigua, Y. athleta, 218. 

 .... Lamberti, crag, 172. 



latrella, 216 ; V. nodosa, 21S. 



Von Buch, Baron, cited, 470, 5S0, 581. 

 ...., on boulders of Jura, M9. 



, on brown-coal, 191. 



. . . ., on Canary Islands, 494 



, on Cystidere, 439. 



. . . . , on land rising, 45. 



WArK£, or argillaceous trap, 474 

 WaZchia plni/ormis, Permian, 356. 

 Wales, ancient glaciers of, 186. 

 Waller, quoted, 98. 

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



eranteus, 144. 

 Waterhouse, Mr., cited, 203, 812. 

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



594 

 Waves, action of, on limestone, 7S. 

 Weald clay, 260. 



Weald valley, denuded at what period, 2S1. 

 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. 



WenerLake, horizontal Silurian strata of, 45. 



Wenlock formation, 428. 



...., shale, 437. 



Werner on classification of rocks, 91. 



, on mineral veins, 618. 



, on volcanic rocks, 463. 



Westerwald, igneous rocks of, 53S, 540. 

 Westphalia, tertiaries of, 178. 

 Weetwood, Mr., on beetles in lias, 328. 

 Whin-Sil, intrusion of trap between beds at 



the, 482. 

 Whinstone. or trap, 474 

 White chalk, 12, 239. 

 White Mountains, granite-vein in, 574. 

 White sand of Alum Bay, 12. 

 Whitestone. or Eurite, 564 

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

 Wolverhampton, fossil forest near, 374 

 Wood, fossil and recent, perforated by Mol- 



lusca, 24 

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

 from the coal, microsconic structure ef, 



40. 



