INDEX. 



407 



Testudini(la>, 313. 



Tetrabranchiate Cephalopoda, 112; of the 

 Cambrian, 89 ; of the Lower Silurian, 

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

 the Devonian, 1)9; of the Carboniferous, 

 186, 187; of tlie 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, 311. 



Thanet Sands, 287, 288. 



Theca, 88, 111, 129. 



Theca Davidii, 88. 



Thecidium, 213. 



Thecodont Reptiles, 218. 



Thecodontosaurus, 200, 218 ; antiquus, 219. 



Thecosmiha annular is, 231. 



Thelodus, 131. 



Theriodont Reptiles, 202, 220. 



Thylacoleo, 349. 



Tile-stones, 116. 



Titanotherium, 316. 



Toothed Birds, 281-283. 



Tortoises, 202, 296. 



Tragoceras, 318. 



Travertine, 21. 



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

 Coal-measures, 164. 



Tremadoc Slates, 77-79. 



Trematis, 110. 



Trenton Limestone, 95, 96. 



Trianthrus 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. 



Trigowa, 235, 255, 269. 



Tngoniadce, 198, 211. 



Trigonocarpum, 170 ; ovatum, 170. 



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



. of the Lower Silurian, 107, 108; of the 

 Upper Silurian, 123, 124 , of the De- 

 vonian, 144, 145 ; of the Carboniferous, 

 179. 



Trimereltidce, 127. 



Trinucleus, 108 ; concentricus, 107. 



Trionyodce, 296. 



Triton, 293 



Trochocyathiut, 266. 



Trochonema, 129. 



Trogontherium. 361 ; Cuvieri, 336, 361. 



Trumpet-shells, 293. 



Tulip-tree, 262, 308. 



Turbinolia sulcata, 292. 



Turbinohdce, 292. 



Turrilites, 272, 273 ; catenulatus, 274. 



Turritella, 271, 293. 



Turtles, 202. 251, 280, 296. 



Typhis tnbifer, 293. 



Ullmania selaginoides, 197. 



Unconformability of strata, 48. 



Under-clay of coal, Ifi2. 



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

 Miocene, 315-319; of the Pliocene, 327- 

 329 ; of the Post-Pliocene, 353-357. 



Uniformity, doctrine of, 5-7. 



Unio, 250. 



Univalves (see Gasteropoda). 



Upper Cambrian, 77-79; Chalk, 259; 

 Cretaceous, 257, 260 ; Devonian, 135 ; 

 Eocene, 287, 288; Greensaud, 258; 

 Helderberg, 135 ; Laurent ian, 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. 



U rsus arclos, 359 ; A rvernemis, 330 ; fe- 

 rox, 359 ; spe.lcea, 360. 



Urwt, 336, 356. 



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



339-341. 



Vanessa Pluto, 312. 

 Varanidce, 202. 

 Vegetation (see Plants). 

 Ventriculites, 264, 265 ; simplex, 265. 

 Venus's Flower-basket, 265. 

 Vertnilla, 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, 



Walchia, 196, 197 ; piniformis, 196. 



Walrus, 322. 



Weal den Beds, 257. 



Wellingtonia, 309, 310. 



Wenlock Beds, 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, 263. 

 White Crag, 324. 

 White River Beds, 307. 

 Wild Boar, 354. 

 Williamsonia, 230. 

 Winged Lizards (see Pterosauria). 

 Winged Snails (see Pteropoda). 

 Wing-shells, 271. 

 Wolf, 336, 360. 

 Wolverine, 360. 

 Wombats, 348. 

 Woolhope Limestone, 115. 

 Woolly Rhinoceros, 339, 341, 344, 353. 

 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 ; Stokesi, 104 ; vermicularis, 174. 

 Zeacrinus, 175. 

 Zechstein, 194. 



5 ; cetoides, 299, 300. 



