INDEX. 



797 



Trap in Triassic of Connecticut 



valley, etc., 430. 

 Travertine, S5.? 201, 574. 

 Traxites, 358. § 

 Trees, erect in rocks, 326.* 



in Arctic Post-tertiary 

 beds, 5(57. 

 Tree-ferns, 333.3 

 Trematis. 184.*? 

 Trematocliscus Koninckii, 



319* 

 Tremolite, 60.? 

 Trenton epoch, 206. 



period, 205. 



period, liornstone of, con- 

 taining organisms, 272. 

 Tretosternum punctatum,464. 

 Triarthrus Beckii, 222. 

 Triassic period, 414. 



American, not marine, 

 417. 



American, coal in, 417. 



American, life of, 417. 



American, general facts 

 of, 43S. 



foreign, 433. 

 Triceratium obtusum, 512. 

 Trichomauites, 355. 

 Triconodon mordax, 463. 

 Trigonia, first of, 450. 



aliformis, 4S7. 



Bronnii. 465. 



clavellata, 459,* 465. 



Conradi. 416.* 



costata, 464, 465. 



elongata, 465. 



gibbosa, 465. 



limbatus, 487. 



longus. 487. 



muricata, 465. 



vulgaris, 438. 

 Trigon icarpum, 337,? 356. 



tricuspidatum, 337.* 

 Trilobites, characteristics of, 

 154,? 18S.§ 



a comprehensive type. 

 597. 



extinction of, 303, 357. 



range of, in time. 401. 



spinous, 297. 

 Triloculina Josephina, 164* 

 Trinidad, mineral oil of, 754. 

 Trinucleus concentricus, 215,* 



216, 222. 

 Trionyx Bakewelli. 464. 



Eocene, 517. 

 Trocholites Ammonius, 214,* 



221. 

 Tropidoleptus carinatus, 284.* 

 Trygon, 279.§ 

 Tubicola, 155.? 

 Tufa, 70.? 74.? 

 Tufa-cones, 688,* 695.* 

 Tully limestone, 281. 

 Tunicates, 157 .? 

 Tuomey & Holmes, on Plio- 

 cene of S. Carolina, 511. 

 Turbellaria, 155.? 

 Turbinella Wilsoni, 517. 

 Turbinolia caulifera, 518. 

 Turbo gibbosus, 464. 



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, 569, 

 572. 

 Tyson, P. T., on Cycads in 

 Maryland, 472. 



Ulodendron, 356. 



Ulster lead and copper mines, 



230. 

 Umbral series, 3S0. 

 Uncites, 1S2.? 



Unconformable strata, 111.3 

 Under-clay, 326.? 

 Undivided tvpes, 396.3 

 Ungulates, 422.? 

 Ungulite grit, 2'l6. 

 Unio Liassinus, 446. 



prisons, 517.* 



Valdensis, 461* 

 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 SlLU- 



KIAX. 



Urals, elevation of, 733. 

 Ure-Ox, 5S0. 

 Ursus, 529.? 



spelams, or Cave Bear, 

 559.* 577. 

 Utah, Subcarboniferous in, 



30S. 

 Utica shale, 217. 



Valley, anticlinal, 105, 722. 

 of erosion, 635. 

 geoclinal, 722. 

 monochnal, 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. 

 remains. See Plants. 



Veins, nature and forms 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. 



capax, 521. 



difformis, 521. 



mercenaria, 521. 

 Vergent series, 380. 

 Vermont, Eolian limestone in, 

 391. 



fossil fruits of Brandon, 

 514. 



Potsdam in, 174. 



Trenton in. 392. 



Upper Helderbergin,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, 531. 

 Virginia, Carboniferous in, 

 322. 



Catskill in, 292. 



Clinton in, 234. 



Cretaceous in. 469. 



faults in. 407, 720. 



Hamilton in, 281. 



Hudson in, 218. 



Lower Helderbergin, 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 spi'ings in, 411. 



Triassic in, 416. 

 Viverra, 529.? 

 Vivipara Fluviorum, 464.* 



Leai, 517.* 



retusa, 517.* 

 Volcanic cones, 687. 

 Volcanoes, nature and action 

 of, 685. 

 ource of, 700. 



active, in the Pacific, 

 6S6. 



distribution of, 685. 



evidence from, of internal 

 heat of globe, 683. 

 Voluta, first of, 484. 



dumosa, 517. 



petrosa, 517. 

 Vohitilithes petrosa, 517. 



