INDEX. 



909 



Trigonia limbata, 476. 

 longa, 476. 



muricata, 449. 



pandicosta, 433. 



scabra, 476. 



Tryoniana, 467. 



vulgaris. 429. 

 Trigonocarpus, 271, 329, 331, 

 349. 



ornatus, 329 * 330. 



tricuspidatus, 329,* 330. 

 Trigonosemus, 171. 

 Trilobites, 122,§ 174,§* 180, 

 189, 190, 202, 253, 289, 300, 

 307, 333, 350, 372, 592, 597. 



a comprehensive type, 382, 

 597. 



culmination of, 249, 594. 



number of Silurian, 249. 



range of, in time, 387* 



spinous, 285.* 

 Triloculina Josephina, 131.* 

 Trinucleus. 174. § 



concentricus, 202,* 204, 206, 

 208. 



range of, in time, 387. 

 Trionvx, 509, 510, 519. 



Bakewelli, 450. 

 Triphvllopteris, 348. 

 Tripolyte, 69.§ 

 Tritia trivittata, 510. 

 Triton, 509 

 Tritonium, 508. 

 Trochoceras, 230. 

 Trochocyathus, 474. 



conulus, 476. 



Fittoni, 476. 

 Trocholites, 203.§ 



Ammonius, 205, 201,* 203 

 Trochonema, 203. 

 Trochosmilia, 474. 



conoidea, 466. 



granulifera, 466. 



striata, 508. 



sulcata, 476. 



Texana, 466. 

 Trochus, 475. 



family, 189, 253. 

 Trogon, 516. 



Trogosus castoridens, 510. 

 Trophon antiquum, 519. 



clathratum, 553, 559. 

 Tropidoleptus carinatus, 272,* 



274. 

 Troxites Germari, 351. 

 Trygon, 263. 

 Tubicinella, 475. 

 Tubicola, 123 § 

 Tubipora, 620. 



Tufa, 62,§ 68.§ 306, 723, 742. 

 Tufa-cones, 724, 726,* 730* 

 Tulip-tree, 458. 

 Tully limestone, 267. 

 Tunicates. See Ascidians. 

 Tunneling by animals, 608 

 Tuomey & Holmes, on Pliocene 



of South Carolina, 495. 

 Turbinella Wilsoni, 509. 

 Turbinolia caulifera, 509. 

 Turbo heliciformis, 448. 



subduplicatus, 448. 

 Turf, protection by, 606. 

 Turkey, 511. 

 Turonian group, 470. 

 Turrilites, 462. § 



Brazoen^is. 468. 



catenatus, 473,* 475. 



eostatus, 476. 



Oregonensis, 467. 



Turrilites poly plocus, 476 

 Turris, 483. 

 Turritella, 508. 



alticostata, 495. 



carinata, 499 * 509. 



Coalvillensis, 508. 



communis, 519. 



erosa, 553 



Hoffmanni, 510. 



multisulcata 518. 



reticulata, 553. 



spironema, 508. 



variata, 510. 

 Turseodus 417. 



Turtles, 121,§ 338,§ 339, 443, 

 450, 464, 485, 5U2, 509, 516. 



first of, 428 



range of, in time, 589. 

 Tylosaurus dyspelor, 468. 



micromus, 465,* 468. 



proriger, 468. 

 Tyndall on glaciers, 694, 695, 



697, 698. 

 Types, comprehensive, 382, 597 



culmination of, 385, 482, 588, 

 594, 597. 



expansion of, 2S8, 383, 483, 

 588, 594, 597. 



extinction of, 288, 384,588, 

 597. 



range of different, 385, 386,* 

 588,* 597. 

 Typhis, 508. 



pungens, 519. 

 Tyrol, plant-beds of, 514. 

 Tyson, P. T., on Cycads in 

 Maryland, 459. 



Uintah Bite., 790, 795, 797. 

 Uintah beds, 456, 490, 494. 

 Uintatherium, 494, 505,§ 510 

 Leidyanum, 510. 

 robustum, 510. 

 Uintornis lucaris, 510. 

 Ullmannia, 371. 

 Ulmus, 497. 

 Ulodendron, 348. 

 Ulster lead and copper mines, 



222. 

 Umbral series, 295, 375. 

 Unakvte, 73.§ 

 Uncites, 171.§ 

 Uncompacted rocks, 63. § 

 Unconformable strata, 100,5* 



181, 183, 210, 215,217, 232, 



289, 308.* 486, 487. 

 Under-clay, 312.§ 

 Under-currents, 674 § 

 Ungulitegrit, 163, 218. 

 Unicardium, 433. 

 Unio, 359, 450, 508, 550, 590. 

 Liassinus, 433. 

 Nebrascensis, 468. 

 priscus, 501,* 508. 

 Valdensis, 450.* 

 United States, Geological map 



of, 144, 292. 

 Unity in the life of the different 



ages, 594. 

 Universality of pressure and 



movements, 826. 

 Univalves, 125. § 

 Unstratified rocks, 107.5 

 Unterquader group, 470. 

 Uplift, Cincinnati, axis of, 391. 

 Uplifts, 92.§ 

 See Elevation, Disturb- 

 ances. 

 Upper Devonian, 254. 



Upper Silurion. See Silurian 

 Urals, Carboniferous in, 347. 



elevation of 347. 



in the Cretaceous, 480. 



position of, 26. 

 Ure-Ox, 582. 



UrocordyJus Wandesfordii, 351 

 Urosalpynx cinerea, 561. 

 Ursa beds. 283, 307. 

 Ursus, 520. § 



amplidens, 567. 



Arctos, 564. 



Arvernensis, 571. 



ferox, 564. 



pristinus, 567. 



spelaeus or Cave Bear, 563 * 

 564. 

 Urus, 562, 565, 571, 582. 

 Utah, Carboniferous in, 293. 



Cretaceous in, 454, 456. 



lignites in, 457. 



silver-mines of, 296, 779. 



Subcarboniferous in, 296. 



terraces in , 549 



Tertiary in, 491, 493. 



Triassic in, 406. 



See, further, Great Salt 

 Lake. 

 Utica epoch, 164, 194. 



shale, 194. 



Valleys, excavation of, 539, 643, 



824. 

 Valvata, 508. 



tricarinata, 550. 

 Vanuxemia Montrealensis, 191. 

 Vanuxem, L., plicated clayey 

 layers, 666. 



metamorphic rocks in the 

 Salina group, 233. 

 Variegated sandstone, 424. 

 Variolyte, 78 § 

 Vaux. analyses of coal, 316. 

 Vegetable kingdom, 1, 133. § 

 Vegetation, protection by, 606. 

 Veins, nature and form of, 

 108,§ 112,§* 770. 



alterations of, 778, 780. 



faultings of, 109,* 772. 



formation of, 775. 



of Lake Superior region, 186. 



false, 113.§ 



works on, 114, 782. 

 Vein-stone, 113. § 

 Vein-structure of glaciers, 697. 

 Venericardia planicosta, 491, 

 509. 



rotunda, 509 

 Ventral valve, 170. § 

 Ventriculites, 472, 474. 



decurrens, 476. 



radiatus, 476. 

 Venus, 475, 483, 500, 508. 



cancellata, 510. 



capax, 510. 



dirformis, 495. 



mcrcenaria, 510, 561. 



tridacnoides, 510. 

 Verd-antique, 70, 75.§ 

 Vergent series, 375. 

 Vermicular sandstone, 294. 

 Vermont, Chazy in, 182. 



Eolian limestone in, 196. 



fossil fruits of Brandon, 494, 

 497, 498 .* 



Helderberg in, 237, 255, 256. 



Niagara in, 211. 



Potsdam in, 167, 181. 



Quaternary in, 529, 531, 537 



