INDEX. 



639 



PAGE 



Taylor , 369 



Teleosaurus brevidens 439 



Teleosts, Cretaceous 482 



Terebratula digona 430 



flavescens 314 



sphseroidalis 430 



Terrace epoch 545, 560 



epoch in Europe 573 



Terraces, river 557 



Tertiary animals 511 



American localities 528 



birds 520 



coal 506 



diatoms 510 



fishes 518 



insects 514 



mammals 522 



mammalian fauna, general observations. 538 



period 502 



period, general observations 543 



period, physical geography 504 



plants 507 



reptiles 519 



rocks, area in the United States 503 



- — — rocks, character 506 



subdivisions 502 



times, map of United States in 505 



Tetragonolepis 436 



Textularia variabilis 162, 472 



Theca Davidii 300 



Theriodonts 419 



Theropody 464 



Thin-crust theory of earth. . < 84 



Thomassy 29 



Thomson, J 66 



, W 87 



Thylacoleo carnifex ; 588 



Tides, effect 35 



Tiger, saber-toothed 577 



Tillodontia 534 



Time, geological divisions and subdivisions. 279 



involved in the Quaternary period 593 



since man appeared 618 



geological, estimate 276 



Tinoceras ingens 533 



Titanotherium 535 



Tooth, ganoid, structure 342 



Torreya £61 



Trachyte 207 



Transition period „ . . 409 



Transportation of sediments 18 



by glaciers 57 



Transporting power of waves 38 



Trap . 206 



Travertine 78 



Tree-fern, living 362 



Tree-ferns of Coal period 362 



Trees, erect fossil, in coal-measures 374 



Trematosaurus 418 



Trenton period 296 



Triassic conifers and cycads 415 



fishes 416 



mammals 421 



period 415 



PAGE 



Triassic period, subdivisions 415 



reptiles 417 



Triceratops flabellatus 499 



Triconodon 448 



Trigonia clavellata 429 



longa, shell and cast 194 



pandicosta 460 



Trigonocarpon, or Trigonocarpus 360 



Trilobite, larva 324 



Trilobites, affinities of 325 



Devonian 333 



Silurian 320 



Trinucleus Pongerardi 323 



Trocholites Ammonius 320 



Tuditanus radiatus 404 



Tufa 91 



Turritella alveata 512 



Turrulites catenatus 482 



Tylosaurus micromus 487 



dyspelor 487 



Tyndall 64, 65, 69, 186 



Tyndall's theory of Glaciers 63 



U 



Uintah basin 503 



Uintatherium 532 



Umbrella planulata 512 



Unconformity 179 



between Silurian and Laurentian 294 



Underclay of coal-seam 347 



Ungulates, diferentiation of families 540 



Unio Holmesianus 498 



Univalves, Silurian 316 



Urodela 400 



Ursus amplidens 582 



pristinus 582 



spelaeus 577 



V 



Vanessa Pluto 515 



Vein-stuffs 235, 243 



Veins, age. how determined 238 



auriferous quartz 240 



auriferous, of California 247 



cupriferous 239 



fissure 235 



metalliferous 235 



metalliferous, contents 235 



metalliferous, important laws affecting. 241 



metalliferous, ribboned structure 236 



metalliferous, theory 243 



metalliferous, vein-stuffs 243 



mineral 234 



mineral, characteristics 235 



fissure, irregularities 237 



of infiltration 224 



of segregation 234 



plumbiferous 240 



pockets in 236 



surface-changes 239 



Vegetable accumulations 140 



Ventriculites simplex 7 . . 477 



