INDEX. 



407 



Testudinidce, 313. 



Tetrabranchiate Cephalopoda, 112; of the 

 Cambrian, 89 ; of the Lower Silurian, 

 112-114 ; of the Upper Silurian, 130; of 

 the Devonian, 149 ; of the Carboniferous, 

 186, 187 ; of the Permian, 199 ; of the 

 Trias, 212; of the Jurassic, 237-239; of 

 the Cretaceous, 272-274 : of the Eocene, 

 294 ; of the Miocene, 312. 



Textulana, 22, 2(54, 311 ; Meyeriana,31I. 



Thanet Sands, 287, 288. 



Theca, 88, 111, 129. 



Theca Damdh, 88. 



Thecidium, 213. 



Thecodont Reptiles, 218. 



Thecodontosaurus, 200, 218 ; antiquus, 219. 



Thecosmihci annularis, 231. 



Tkelodus, 131. 



Theriodotit Reptiles, 202, 220. 



Thylacoleo, 349. 



Tile-stones, 11(5. 



Titanotherium, 316 



Toothed Birds, 281-283. 



Tortoises, 202, 296. 



Tragoceras, 318. 



Travertine, 21. 



Tree-Ferns, of the Devonian, 136; of the 

 Coal-measures, 1(54. 



Tremadoc Slates, 77-79. 



Trematis, 110. 



Trenton Limestone, 95, 96. 



Trianthrm Beckii, 107. 



Triassic period, 203; rocks of, in Britain, 

 204; in Germany, 204 ; in the Austrian 

 Alps, 205; in North America, 205; life 

 of, 206-224. 



Triconodon, 254. 



Tngonia, 235, 255, 269. 



Trtgoniadce, 198, 211. 



Trigonocarpuin, 170 ; ovatuin, 170. 



Trilobites, 84-87; of the Cambrian, 85, 87; 

 of the Lower Silurian. 107, 108; of the 

 Upper Silurian, 123, 124 , of tlie De- 

 vonian, 144, 145 ; of the Carboniferous, 

 179. 



Trimerellidce, 127. 



Trinucleus, 108 ; concentricus, 107. 



Trionycidce, 296. 



Triton, 293 



Trochocyathw, 266. 



Trochonema, 129. 



Trogontherium, 361 ; Cuvleri, 336, 361. 



Trumpet-shells, 293. 



Tulip-tree, 262, 308. 



Turbinolia sulcata, 292. 



Turbinohdce, 292. 



Turrilites, 272, 273 : catenulaius, 274. 



Turritella, 271, 293 



Turtles, 202, 251, 280, 296. 



Typhis tubifer, 293. 



Ullmania selaginoides, 197. 



Unconformability of strata, 48. 



Under-clay of coal, 162. 



Ungulata, of the Eocene, 300-303 ; of the 

 Miocene, 315-319 ; of the Pliocene, 3^7- 

 329 ; of the Post-Pliocene, 353 357. 



Uniformity, doctrine of, 5-7. 



Unio, 250. 



Univalves (see Gasteropoda). 



Upper Cambrian, 77 - 79 ; Chalk, 2 E >9 ; 

 Cretaceous, 257, 260; Devonian, 135; 

 Eocene, 287, 288; Greensand, 258; 

 Helderberg, 135 ; Laurentian, 66 ; Llan- 

 dovery, 115 ; Ludlow rock, 116 ; Mio- 

 cene, 305 ; Oolites, 227 : Silurian period, 

 115; rocks of, in Britain, 115, 116; in 

 North America, 116-118 ; life of, 118-131. 



Uraus nrctos, 359 ; A rverncnsis. 33 > ; J'e- 

 rox, 359 ; spelcea, 360. 



Urm, 336, 356. 



Valley-gravels, high-level and low-level, 



339-341. 



Vanessa Pluto, 312. 

 Varamdce, 202. 

 Vegetation (see Plants). 

 Ventriculites, 264, 265 ; simplex, 265. 

 Venus's Flower-basket, 265. 

 Vermilia, 197. 



Vespertiho Parisiensis, 304, 305. 

 Vicksburg Beds, 289. 

 Vines, 306, 309, 310. 

 Vitreous Sponges, 264. 

 Voltzia, 208 ; heterophylla, 209. 

 Valuta, 271, 293 ; elongala, 271. 

 Volutes, 271, 2J>3, 312. 



Walchia, 196, 197 ; piniformis. 196. 



Walrus, 322. 



Weal den Beds, 257. 



Wellingtons, 309, 310. 



Wenlock Brds, 115, 117; Limestone, 115; 



Shale, 115. 

 Wentle-traps, 271. 

 Werfen Beds. 205, 2*6 

 Whalebone Whales, 299, 315 

 Whales, 299, 315. 

 Whelks, 237. 

 White Chalk, 259; structure of, 21, 22; 



origin of, 23, 2(53. 

 White Crag, 324. 

 White River Beds, 307. 

 Wild Boar. 354. 

 Williarnsonia, 230. 

 Winged Lizards (see Pterosauria) 

 Winged Snails (see Pterupoda). 

 Wing-shells, 271. 

 Wolf, 336, 360. 

 Wolverine, 360. 

 Wombats, 348. 

 Woolhope Limestone, 115. 

 Woolly Rhinoceros, 339, 341, 344, 35?. 

 Woolwich and Reading Beds, 287. 

 Worm -burrows, 82, 83, 123. 



Xanthidia, 138, 161. 

 Xenoneura antiquorum, 145. 

 Xiphodon, 303. 

 Xylobius, 182 ; Sigillarice, 182 



Zamia spiralis, 208. 



Zamites, 208, 230, 310. 



Zaphrentis, 105, 119, 142, 173; cornicula, 



141; StoJcesi, 104; vermicular is, 174. 

 Zeacrinus, 175. 

 Z^ehstein, 194. 

 Zeuglodon, 299, 315 ; cetoides, 299, 3 0. 



