INDEX. 



799 



Trap in Triassic of Connecti- 

 cut valley, etc., 430. 

 TraTertine, S5,§ 201, 574. 

 Traxites, 358.? 

 Trees, erect in rocks, 326.* 



in Arctic Post-tertiary 

 beds, 667. 

 Tree-ferns, 333.? 

 Trematis, 184.*? 

 Trematodiscus Koninckii, 



319* 

 Tremolite, 60.? 

 Trenton epoch, 206. 



period, 205. 



period, hornstone of, con- 

 taining organisms, 272. 

 Tretostoi num. punctatum, 



461. 

 Triarthrus Beckii, 222. 

 Triassic period, 414. 



American, not marine, 

 417. 



American, coal in, 417. 



American, life of, 417. 



American, general facts 

 of, -138. 



foreign, 433. 

 Triceratium obtusum, 512. 

 Trichomanites, 355. 

 Triconodon mordax, 463 

 Trigonia, first of, 450. 



aliformis, 487. 



Bronnii, 465. 



clavellata, 459,* 465. 



Conradi, 446* 



costata, 464, 465. 



gibbosa, 465. 



limbatus, 4S7. 



longus, 487. 



muricata, 465. 



vulgaris, 438. 

 Trigonocarpum, 337,? 356. 



tricuspidatum, 337.* 

 Trilobites, characteristics of, 

 154,? 188.? 



a comprehensive type, 

 597. 



extinction of, 303, 357. 



range of, in time, 401. 



spinous, 297. 

 Triloculina Josephina, 164 * 

 Trinidad, mineral oil of, 755. 

 Trinucleus concentricus, 215* 



216, 222. 

 Trionyx Bakewelli, 464. 



Eocene, 517. 

 Tritia trivittata, 521. 

 Trocholites Ammonius, 214* 



221. 

 Tropidoleptus carinatus, 284.* 

 Trygon, 279.g 

 Tubicola, 155.3 

 Tufa, 70,| 74.? 

 Tufa-cones, 688,* 695* 

 Tully limestone, 281. 

 Tunicates, 157. ? 

 Tuomey & Holmes, on Plio- 

 cene of South Carolina, 

 511. 

 Turbellaria, 155.§ 

 Turbinella Wilsoni, 517. 

 Turbinolia caulifera, 518. 

 Turbo ornatus, 464. 



Turbo subplicatus, 464. 

 Turonian group, 480. 

 Turrilites, 473.? 



Brazoensis, 478. 



catenatus, 485.* 



Turritella carinata, 517.* 



erosa, 552. 

 Turseodus, 427. 

 Turtles, 345,? 347. 

 first of, 438, 462. 

 range of, in time, 572. 

 in the American Tertiary, 

 515. 

 Tyndall on glaciers, 672, 673, 



674, 675. 

 Types, comprehensive, 203, 

 395, 500, 595. 

 culmination of, 399, 400, 



496, 572, 594, 599. 

 extinction of, 397, 598, 601. 

 range of different, 400, 571, 

 572. 

 Tyson, P. T., on Cycads in 

 Maryland, 472. 



Ulodendron, 356. 



Ulster lead and copper mines, 



230. 

 Umbral series, 380. 

 Uncites, 182.? 



Unconformable strata, 111.? 

 Under-clay, 326.? 

 Undivided types, 396.§ 

 Ungulates, 422.? 

 Ungulite grit, 216. 

 Unio Diassinus, 446. 



priscus, 517.* 



Valdensis, 464* 

 United States, coal areas in, 

 324. 



Geological map of, 133. 

 Unity in the life of the differ- 

 ent ages, 598. 

 Univalves, 156.? 

 Unstratified rocks, 117.? 

 Uplift, Cincinnati, axis of, 330. 

 Uplifts, 103? 



See Elevation. 

 Upper Silurian. See Silu- 

 rian. 

 Urals, elevation of, 733. 

 Ure-Ox, 580. 

 Ursus, 529 ? 



spelasus, or Cave Bear, 

 559,* 577, 582. 

 Utah, Subcarboniferous in,308. 

 Utica shale, 217. 



Valley, anticlinal, 105, 681. 

 of erosion, 635. 

 geoclinal, 722. 

 monoclinal, 720, 722. 

 synclinal, 105, 722. 

 Valleys, formation of, by 

 rivers, 635. 

 formation of, through pli- 

 cations, 722. 

 Vanuxem on plicated clayey 



layers, 716. 

 Varanus Niloticus, 346. 

 Vegetable kingdom, 165.? 

 kingdom, relation to ani- 

 mal, 747. 



Vegetable romains. See 



Plants. 

 Veins, nature and form of, 

 119 ; ? 120* 



alterations of, 714. 



faultings of, 120, 715. 



formation of, 711. 



of Lake Superior region, 

 origin of, 712. 



false, 123.? 

 Venericardia planicosta, 517. 



rotunda, 517. 

 Venus cancellata, 521. 



mercenaria, 521. 

 Vergent series, 380. 

 Vermont, Eolian limestone in, 

 391. 



fossil fruits of Brandon, 

 510, 514. 



Potsdam in, 174. 



Trenton in, 392. 



Upper Helderberg in, 270. 

 Verneuil, on commencement 



of Devonian, 268. 

 Vertebrate types, range of, 



571. 

 Vertebrates, 151, 152.? 



rank of earliest, 396. 



first of, 264. 



first American, 272. 



number of living, 575. 

 Vespertilio, 527,? 529. 

 Vespertine series, 380. 

 Vesuvius, 690. 



Vicksburg epoch, 506, 508, 517 

 Vienna, Miocene plants of 



525, 534. 

 Virginia, Carboniferous in, 

 322. 



Catskill in, 292. 



Clinton in, 234. 



Cretaceous in, 468. 



faults in, 407, 720. 



Hamilton in, 281. 



Hudson in, 218. 



Lower Helderberg in. 252. 



Medina in, 231. . 



Millstone grit in, 322. 



monoclinal faults in, 720. 



Oneida in, 230. 



Oriskany in, 266. 



Potsdam in, 175. 



Subcarboniferous in, 308. 



Tertiary in, 507, 510, 511. 



thermal springs in, 411. 



Triassic in, 416. 

 Viverra, 529.? 

 Vivipara Fluviorum, 464.* 



Leai, 517.* 



retusa, 517.* 

 Volcanic cones, 687. 

 Volcanoes, nature and action 

 of, 685. 



source of, 700. 



active, in the Pacific. 

 686. 



distribution of, 685. 



evidence from, of interna] 

 heat of globe, 683. 

 Voluta, first of, 484. 



dumosa, 517. 



petrosa, 517. 

 Volutilithes petrosa, 517. 



