Part 54

Tæniopteris, 315. Taxoceras, 289. Taxodites, 239. „ Münsterianus, 202. Teeth of Mammoth, 384. Teeth of Iguanodon, 293. „ Mastodon, 346. „ Megalosaurus, 291, 380. „ Machairodus, 380. Teleosaurus, 245, 256, 259. „ cadomensis, 259. Temperature of the Earth, Increase of as we descend, 2, 16, 87. „ „ at Various Depths, 16. „ „ of Deep Mines, 16, 88. „ „ at the Centre, 16. „ of Planetary Regions, 86. „ uniform, in Carboniferous Period, 133. „ Gradual Alteration of, during Tertiary Period, 313. „ of Cretaceous Period, 283. Terebellaria ramosissima, 184. Terebratula digona, 246. „ decussata, 252. „ hastata, 141. „ deformis, 290. „ subsella, 266. Terebrirostra lyra, 290. Terrestrial Plants of Devonian Period, 120. Tertiary Period, 312. „ Vegetation of, 313. „ Animals of, 312. Tetragonolepis, 217. Teutobocchus Rex, 348. Thallogens, 123. Thanet Beds, 330. Theoretical View of a Plateau, 47. Theories of the Earth, 15. Theory, Hutton’s, 3. „ Laplace’s, 17. Thermal Springs, 23. Thickness of the Earth’s Crust, 89. Thomson, Sir William, on the Earth’s Crust, 89. Thylacotherium, 245. Tidal Wave, 22. Tile Stones, 110. Till Formation, 457. Tortoises, 401. Toxoceras, 289. Toxodon, 412. Trachyte, 39. Trachytic Formations, 39. Trail, 461. Transition, or Primary Epoch, 99. Transported Blocks, 449. „ Rocks, 27. Trapa natans, 315. Trappean Grotto, Staffa, 47. Travertin, 333. Tree Ferns, 174, 240. Tremadoc Slates, 109. Treuil, Coal Mine at, 160. Triassic Period, 185. „ Flora, 187, 193, 202. Trigonia, 12, 205. „ margaritacea, 314. Trigonocarpum Nöggerathii, 177. Trilobites, 104, 107, 110, 126, 141, 181. Trimmer, Joshua, on Moel Tryfaen, 459. Trinucleus Lloydii, 129. Trionyx of Tertiary Period, 326. Trionyx, a Turtle, 319, 326, 329. Tropical Vegetation, D’Orbigny on, 337. Trunk of Calamites, 136. „ Sigillaria, 136. Tunbridge Wells Sand, 286. Turbaco, Mud Volcanoes of, 61. Turonian Series, 309, 310. Turrilites, 289. „ communis, 290. „ costatus, 289. Turritella terebra, 289. Turtle, 187, 237, 272, 319, 326, 329, 331, 356. Tyndall’s, Professor, Theory of Heat, 24.

Uncites Gryphus, 127. Under Clay, 161. Unicornu Fossile, 386. Unio, 266. Upper Cretaceous, 300-306. „ Greensand, 300, 309. „ Oolite, 265. „ Lias, 212, 273. „ Lias Clay, 212. „ Silurian Period, 110. Ursus spelæus, 184, 395, 417. „ Head of, 184.

Vale of Wardour, 269. Valley of Poison, 64. Vallisneri on Marine Deposits of Italy, 6. Variegated Sandstone, 187. Veins of Granite traversing Gneiss of Cape Wrath, 32. Velay, Chain of the, 43. Vertebrata, First Appearance of, 107. Vespertilio Parisiensis, 326. Vesuvius, 56, 68. „ Existing Crater of, 56. Virgularia, 263. Vivarais, Valley of, 47. Volcanic Bombs, 59. „ Ashes, 58. „ Scoriæ, 57. „ Eruptions, 57. „ Formations, 51. „ Islands, 55. „ Rocks, 31, 39. Volcano in Action, 52. Volcanoes, 51. „ Action of, 57, 63. „ Active, 55, 67. „ Mud, 60, 63. „ Extinct, 63. „ Sandwich Islands, 56. „ Watery, 23, 59. Voltaire and Buffon, 6. Voltzia heterophylla, 194. Voltzia restored, 195. Vosges Mountains, 75. „ „ Submergence of in Permian Period, 180.

Wadhurst Clay, 286. Walchia, 177. „ Schlotheimii, 176. Warp, 461. Water, First Cradle of Life, 100. Waterstones, 245. Watery Volcanoes, 23, 59. Weald Clay, 279, 281, 286, 298. Wealden Beds, 279. „ Shells, 281. Wenlock Rocks, 110. Whale of the Rue Dauphine, 370. White Chalk, Berthier’s Analysis, 298. White Lias, 208. Wild Man of Aveyron, 469. Williamsonia, 239. Wood, Searles V., Junr., on Glacial Deposits, 460. Wookey Hole, 474. Woolwich and Reading Beds, 330. Wright, Dr. Thos., on Penarth Beds, 209.

Xiphodon, 320, 324, 329. „ gracile, 324.

Ysbrants Ides’ Account of Discovery of Frozen Mammoth, 389. Yuccites, 194.

Zamia, 249, 270. „ Moreana, 255. Zamites, 194, 239, 255, 297. Zechstein, 170. Zeolites, 44. Ziphius, 370. Zones of different density round the incandescent Earth, 85. Zoophytes of Lias, 238. „ Middle Oolite, 263. „ of Carboniferous Period, 141. Zostera, 123, 266.

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