INDEX. 



407 



Tcstudinidce, 313. 



Tetrabranchiate Cephalopods, 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 



Textularia, 22, 2(34, 311 ; Meyeriana, 311. 



Thanet Sands, 287, 288. 



Theca, 88, 111, 129. 



Theca Davidii, 88. 



Thecidium, 213. 



Thecodont Reptiles, 218. 



Thecodontosaurus, 200, 218 ; antiquus, 219. 



Thecodinilia annularis. 231. 



Thelodm, 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. 



Tnanthrus 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. 



Trigonia, 235, 255, 269. 



Tmgoniadce, 198, 211. 



Trigonocarpum, 170 ; ovatum, IVO. 



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. 



Trimerellidoe, 127. 



Trinucleus, 108 ; coneentricus, 107. 



Trionycidce, 296. 



Triton, 293 



Trochocyathus, 266. 



Trochonema, 129. 



Trogontherium, 361 ; Cuvieri, 336, 361. 



Trumpet-shells, 293. 



Tulip-tree, 262, 308. 



Turhinolia sulcata, 292. 



Turbinohdm, 292. 



Turrilites, 272, 273 : catenulatus, 274. 



Turritella, 271, 293. 



Turtles, 202, 251, 280, 296. 



Typhis tuUfer, 293. 



Ullviania selaginoides, 197. 



Unconformabiliuy of strata, 48. 



Under-clay of coal, 162. 



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; 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. 



Ursus arctos, 359 ; A rvernensis, 330 ; fe- 

 rox, 359 ; spelcea, 360. 



Urus, 336, 356. 



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



339-341. 

 Vanessa Phito, 312. 

 Varamdce, 202. 

 Vegetation (see Plants). 

 Ventriculites, 264, 265 ; simplex, 265. 

 Venus's Flower-basket, 265. 

 Vermilia, 197. 



Vespertiho Parisicnsls, 304, 305. 

 Vicksburg Beds, 289. 

 Vines, 306, 309, 310. 

 Vitreous Sponges, 264. 

 Voltzia, 208 ; heterophylla, 209. 

 Valuta, 271, 293 ; elongala, 271. 

 Volutes, 271, 293, 312. 



Walchia, 196, 197 ; piniformis, 196. 



Walrus, 322. 



Wealden Beds, 257. 



Wellingtonia, 309, 310. 



Wenlock Beds, 115, 117; Limestone, 115; 



Shale, 115. 

 Wentle-traps, 271. 

 Werfen Beds, 205, 2fi6. 

 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 ; vermicular is, 174. 

 Zeacrinus, 175. 

 Zechstein, 194. 

 Zeuglodon, 299, 315 ; cetoides, 299, 300. 



