908 



INDEX. 





Tentaculites tenuistriatus, 206. 

 Terebellum fusiforme, 519. 



sopita, 519. 

 Terebra, 508. 

 Terebratella, 170, § 173, 474. 



pectita, 476. 

 Terebratula, 170,§ 173,385,433, 

 448, 474, 482, 488, 500. 



analysis of, 60. 



biplicata, 476. 



bovidens, 341. 



carnea, 476. 



caput-serpentis, 488. 



cornuta, 429. 



digona, 449. 



elongata, 373 



family, 170. §* 



fimbria, 449. 



grandis, 519. 



gregaria, 429. 



Harlani, 460 * 467, 469. 



hastata, 307,* 308. 



impressa, 119.* 



last of, 437. 



numismalis, 448. 



perovalis, 449 



pyriformis, 429. 



range of, in time, 387.* 



rimosa, 448. 



sella, 475. 



striata, 488. 



vitrea, 171.* 



vulgaris, 428, 429. 

 Terebratula? common in the 



Tertiary, 515 

 Terebratulina, 170,*§ 474. 



caput-serpentis, 171* 



plicata, 460,* 467, 469. 

 Terebrirostra, 170. § 

 Teredo, 608. 



tibialis, 468. 

 Termatornis, 468. 

 Termatosaurus, 429 

 Termes Heeri, 351. 

 Termination yte explained, 65. 

 Termites, 349, 608. 

 Terrace epoch. See Recent 



Period. 

 Terraces of rivers, lakes, and 

 sea-sbores, 545,* 551, 558. 



height due mostly to height 

 of flood. 557, 662. 



formation of, 662. 



in Great Britain, 558. 

 Terranes, 7y,§ 81. § 

 Terricola, 123 § 

 Terrestrial life rarely fossilized, 



613. 

 Tertiary age, 139, 489. § 



N. American, map of, 521.* 



divisions of, 512. 



proportion of modern species 

 in, 513. 



and Quaternary, contrast in, 

 586. 

 Teschenite, 79. § 

 Testudo Culbertsonii, 510. 



hemisphserica, 510. 



lata, 510. 



Oweni, 510. 

 Tetrabranchs, 439, 483. 

 Tetradecapods, 122,§* 335. 



range of, in time, 388.* 

 Tetradium columnare, 202. 



fibrosum, 202, 204 * 

 Tetragonolepis, 442.* 

 Tetrapterus priscus, 518 

 Textularia, 208, 474. 



globulosa, 131,* 466. 



Textularia Missouriensis, 466 

 Texas, Archaean in, 150. 

 Carboniferous in, 291. 

 Cretaceous in, 455, 456, 478. 

 in the Cretaceous, 479. 

 Potsdam in, 168 

 Texas, Subcarboniferous in 

 293 

 Tertiary in, 491, 493. 

 terraces in, 548. 

 Thallogens, 133 § 

 Thanet sands, 512, 518. 

 Theca, 180, 372 

 corrugata, 180. 

 gregarea, 178.* 

 triangularis, 208. 

 vaginula, 208. 

 Thecidea, first of, 448, 474. 

 Thecidium, 173,§ 174. 

 Thecocyathus rugosus, 448. 

 Thecodonts, 338, § 371, 414. 

 first of, 374, 376. 

 range of, in time, 589,* 592. 

 Thecodontosaurus, 338, § 428. 

 Thecosmilia Tarquemi, 448. 

 Thelodus parvidens, 246* 

 Thenaropus heterodactylus, 



343. 

 Thermal springs, 401, 707, 724, 



749. 

 Thinolestes anceps,510 

 Thinosaurus grandis, 510 

 Thomson, James, 696. 

 Thomson, Wm.. 591, 718, 809, 

 815, 833. 

 Works of, 833 

 Thomson, Wyville, 678, 686. 

 Thoracosaurus Neocaesariensis, 



467. 

 Thracia Conradi, 553. 

 Thrissops, 264.* 

 Thuia, 497. 

 Thuiopsis, 514. 

 Thuringia, Permian in, 369. 

 Thuyites, 449. 

 Thylacotherium Broderipii, 



446, 448.* 

 Tiaropsis, 117.* 

 Tiburtine, 69.§ 

 Tick, 121. § 



Tides and tidal currents,672,680. 

 Tiger, 507, 564. 

 Tile Clay, 513. 

 Tilestones, 164, 244 

 Till, 68 § 



Tillomys senex, 510. 

 Tillodonts, 504 

 Tillotherium hyracoides, 510. 

 Time, geological, 590, 833. 

 Time ratios, 381, 481, 585, 833. 

 Tinoceras, 510. 

 Tinodon, species of, 852. 

 Titanic iron, 59, § 76. 

 Titanotherium, 495, 506. 



Proutii, 506,*511. 

 Tithonic group, 435. 

 Tivoli travertine beds, 707. 

 Toarcian group, 435. 

 Todt liege tide, 369. 

 Tombigby sand, 456. 

 Tomopteris, 123. § 

 Tongrian group, 513. 

 Tookey, analysis of coal, 316. 

 Topaz, 58, §* 762. 

 Topographical effects of ero- 

 sion, 651. 

 Torbanite, 315, 316. 

 Torrent-portion of a stream, 

 642.§ 



Torrid zone, 41. § 

 Totten, expansion of rocks, 720. 

 Tourmaline, 57, §* 762. 

 Townsend, W., flowing of cold 



metals, 799. 

 Toxaster complanatus, 475, 476. 



elegans, 466, 468. 

 Toxoceras, 462. § 



bituberculatum, 473,* 475. 

 Trachelomonas levis, 634* 

 Trachium cyathiforme, 190. 

 Trachydoleryte, 78. § 

 Trachyte, 77,§ 727, 733, 742. 

 Tracks See Footprints . 

 Trails. See Footprints. 

 Trains of bowlders, 529. 

 Translation-waves, 674. 

 Transportation by currents, 

 654, 677. 

 by icebergs, 701. 

 by rivers, 653. 

 by waves, 678. 

 Trap, 78, §49, 306. 

 at Lake Superior, 185. 

 distribution and formation 



of, 740, 746. 

 minerals of Nova Scotia, 418. 

 in Triassic of Connecticut val- 

 ley, etc , 20,* 418* 421, 

 452, 486, 741, 746 

 Triassic, of uniform charac- 

 ter, 417. 

 Trapa natans, 135 § 



ash of, 366 

 Travertine, 69,§ 707. 

 Trees, erect in rocks, 296, 356,§ 

 436.* 

 protection by, 607. 

 silicified, 709. 

 Tree-ferns, 258, 270, 323, 327, 



351, 356, 370, 408, 609. 

 Tremadoc slates, 163, 192. 

 Trematis, 173,§ 203. 

 can eel lata, 207. 

 punctata, 207. 

 Trematodiscus Koninckii, 307,* 



308. 

 Trematosaurus, 428, 429. 

 Trematospira, 171 

 Tremolite, 54, § 757. 

 Trends, systems of, 29, 827. 

 Trenton epoch, 163, 194. 

 period, 163,194,251 

 period, hornstone of, contain- 

 ing organisms, 261. 

 Tretosternum punctatum, 450 

 Triacodon aculeatus, 510. 

 fallax, 510. 

 grandis, 510. 

 Triarthrella, 168, 178. 

 Triarthrus, 204. 

 Beckii, 206 * 

 range of in time, 387.* 

 Triassic period, 403. § 



foreign, 423 

 Triceratium obtusum, 496.* 

 Trichomanites, 271. 

 Trichospongia sericea, 188. 

 Tridymite, 53 § 

 Trigonia, 431, 432, 433, 475. 

 aliformis, 476. 

 Bronnii, 449. 

 caudata, 475. 

 clavellata, 438* 449. 

 Conradi, 432,* 433. 

 costata, 449. 

 daedalea,475, 476. 

 Evansana, 458. 

 gibbosa, 449. 



