INDEX. 



60 1 



Thylacinus, 408. 



Thylacoleo, 412, 413. 



Thysanura, 187. 



Tornatella, 261. 



Tornatellidce, 261. 



Tortoises, 358, 359. 



Toucan, 395. 



Toxoceras, 291. 



Trachyderma, 139. 



Trachynemidce, 74. 



Tracks, of Annelides, 141, 142. 



Tremadoe Slates, 512, 515. 



Trematis, 212. 



Trenton period, 508, 516. 



Triassic period, rocks of, 530; life of, 533: 



flora of, 496. 

 Trichecidce, 450. 

 Trickites, 225. 

 Trichotropis, 247. 

 Triconodon, 406, 411 

 Tridacna, 232. 

 Tridacnidce, 218, 232. 

 Trigonia, 228, 229. 

 Trigomllites, 287. 

 Triyoniadce, 218, 228, 530. 

 Trigonoearpum, 482, 484, 492, 494. 

 Trilobita, characters of, 160 ; distribution 



of, in time, 167; families of, 167-171. 

 Trimerocephalus, 170. 

 Trinucleidce, 167, 169. 

 Trinucleus, 162, 167, 169. 

 Trionycidce, 358, 359. 

 Trwnyx, 359. 

 Tristichopterus, 327. 

 Triton, 247. 



Trochoceras, 281, 283, 292. 

 Trochocyathus, 537, 543. 

 Trochocystites, 132. 

 Trochoseris, 96. 

 Troehosmilia, 543. 

 Trochus, 256. 

 Trogonidce, 395. 

 Trogontherium, 459. . 

 Tropidaster, 537. 

 Tubicola, characters of, 137 ; distribution 



of, in time, 138. 

 Tubiporidce, 101. 

 Tubitlaria, 74. 

 Tubulipora, 198. 



Tubulosa, 96 ; distribution of, in time 97 

 Tunicata, 187. 

 Turbinaria, 96. 

 Turbinella, 247. 

 Turbinidce, 255, 264. 

 Turbinolia, 92. 

 Turbinolidce, 97, 100. 

 Turbo, 255, 256. 

 Turrilepas, 152, 153, 154, 155. 

 Turrilites, 276, 288, 292. 

 Turritella, 253 

 Turritellidce, 253. 

 Turtles, 358, 359. 

 Typhis, 247. 



(Tllmania, 475, 496, 529. 



Umbrella, 262. 



Uncites, 206. 



Unconfonnability, of strata 33. 



Undina, 327. 



Ungulata, characters of, 423 ; divisions of, 



4jiO. 



C/mo, 229. 



, 218, 229. 

 Univalve Shells, 240, 241. 

 Unrepresented time, 32-36. 

 Upper Cretaceous Rocks, 540. 

 Upper Oolitic Rocks, 536. 

 Uraster, 111, 113, 114 115 

 Urocondylus, 352. 

 Urodela characters of, 347 ; distribution 



of, m time, 347, 349. 

 Ursidce, 449, 450. 

 LTrsus, 451. 

 J7rws, 439, 400. 



Valvata, 245, 255. 



Vegetable kingdom, divisions of 473 



Venendce, 218, 219, 236. 



Ventriculites, 67, 70. 



Fent^, 236. 



Vermetus, 137, 138, 242, 253 



Ferrwca, 152. 



Verrucidce, 150, 152 



F< 5f^S"i l SSS2S M1 of ' 299 '' skeleton 



ol, 300 ; distnbntion of, in time 306 

 Vespertilio, 461, 462. 

 Vespertilionidce, 461. 

 Vibracula, 194. 

 FincwZaria, 544. 

 Viperine Snakes, 360. 

 Virgularia, 101. 

 Fi'verra, 452. 

 Viverridce, 449, 452, 453 

 FoZtewz, 476, 497, 533 

 Valuta, 249, 250. 

 Volutidce, 249. 

 s, 454. 



Walchia, 495, 496, 529. 



Waldheimia, 204. 



Wealden, 540. 



Websteria, 101. 



Wellingtonia, 502. 



Wenlock series, 516. 



Whalebone Whales, 419. 



White Crag, 555. 



Williainsonia, 497. 



Woolwich and Reading Series, 548. 



Xanthidia, 69. 



Xantholites, ISO. 



Xanthopsis, 180. 



Xenoneura, 185. 



Xiphodon, 431. 



^pAoswm, characters of, 174; distribu- 



tion of, in time, 174, 175 

 Xiphoteuthis, 299. 

 Xylobius, 184. 



Zamia, 496. 

 Zamites, 497. 

 Zaphrentis, 89. 

 Zechstein, 529. 

 Zeuglodon, 421. 

 Zeitglodontidce, 419, 421. 

 Ziphioid Whales, 419, 420. 

 Ziphius, 421. 



Zoantharia,73,86;Malacodermata 85 86- 

 ' ' 



Zoocapsa, 152. 

 Zygosaurus, 353. 



