638 
INDEX. 
SFESS. 
Sness, M., on Vienna basin, 225. 
Suffolk, crag of, 195. 
“ Sunk country,” New Madrid, 402. 
Superga, Lower Miocene of the, 244, 
Superior, Lake, marl in, 63. 
Superposition of deposits, a test of age, 
124. 
-a test of age of volcanic rocks, 521. 
Sutherlandshire, uuconformable Palaeozo¬ 
ic strata in, 112. 
Swanage, fossil mammalia found at, 326. 
Sweden, Cambrian of, 489. 
-, slow rise of land in, 72. 
-, small thickness of Silurian strata in, 
477. 
Switzerland, lake-dwellings of, 148. 
-, Lower Molasse of, 235. 
-, Middle or Marine Molasse of, 223. 
-, Upper Miocene of, at OEningen, 215. 
Sj^dney coal-field, rain-prints in, 416. 
Syenite, composition of, 552,557. 
-, how far connected with trap-rocks, 
558. 
Syenitic granite, 557. 
Symonds, Rev. W. S., on Moel Tryfaen 
shells, ISO. 
Synclinal and anticlinal curves, 74,85. 
TABLE of Botanical Nomenclature, 303. 
-of St. Cassian fossil mollusca, 377. 
-of Cretaceous formations, 283. 
-of Devonian series in Devon, 449. 
-of divisions of Hastings Sand, 316. 
-of English and French Eocene strata, 
252. 
-of ages of fossil vertebrata, 464. 
-of Neocomian strata, 308. 
-of mammalia older than Parisgypsum, 
329. 
-of marine testacea in the Crag, 202. 
-of Oolitic strata, 321. 
-of volcanic minerals, 499. 
- of Silurian strata of United States, 
478. 
-of Silurian rocks, 458. 
-of Triassic strata, 375. 
-of Cambrian strata, 482. 
-of Permian of north of England, 386. 
-of Welsh coal-measures, .394. 
--of thicknesses of Carboniferous Lime¬ 
stone, 395. 
-, general, of fossiliferous strata, 131. 
Table mountain, granite veins in clay-slate 
of, 560. 
Tails of homocercal and heterocercal fish, 
389. 
Talcose granite, 557. 
-gneiss, 578. 
Tarannon shales, 468. 
Tartaret cone, and lava of, 527, 542. 
Tate, Mr., on St. Cassian fossils, 377. 
Tealby series. Middle Neocomian, 312. 
Teeth of extinct mammalia, 163,164. 
Tellina balthica (T. solidula), 190. 
- calcarea {T. proxima), 177. 
- obliqua, Crag, 194. 
Temnechinus excavatus, 200. 
Temnopleurus excavatus^ 200. 
Tentaculitcs anjiulalus, Silurian, 469. 
Terebellum fuHiforme^ Barton, 259. 
■- sopita, Barrcrn, 259. 
Terebratula Aymestry, 462. 
TRIAS. 
Terebratula biplicata. White Chalk, 294. 
- carnea, White Chalk, 294. 
- digona, Bradford clay, 345. 
- fimbria^ Inf. Oolite, 350. 
- hastata, Mountain Limestone, 434. 
- sella, Neocomian, 310. 
- Wilsoni, Aymestry, 462. 
Terebratulina striata, White Chalk, 294 
Terebrirostra lyra, Chloritic Sand, 300. 
Teredo navalis, boring wood, 50. 
Tertiary formations, classification of, 137, 
143. 
-strata, subdivisions of, 143. 
-, term defined, 123. 
Testacea. See Shells. 
Thallogens, 303. 
Thamnastroea, Coi*al Rag, 339. 
Thanet sands, 2r>9. 
Theca operculata, Tremadoc beds, 483. 
Thecodontosaurus, tooth of, 374. 
Thecodus parvidens, Ludlow, 460. 
Thecosmilia anuMlaris, Coral Rag, 339 
Thirria, M., on Nerinaean limestone, 340. 
Thompson, Dr., on nummulites of Thibet, 
277. 
Thomson, Wyville, on Atlantic mud, 288. 
-, on sponges in chalk mud, 292. 
Thuringia, monitor of, 390, 463. 
Thurmaun, M., on Bernese Jura Oolite, 
344. 
-, on structure of the Jura, 83. 
Thylacotherium Prevostii, Stonesfield, 347. 
Tile-stones of the Upper Ludlow, 459. 
Tilgate forest, fossil Iguanodoii in, 315. 
Till described, 166. 
-, mammoth in Scotch, 175. 
-of North America, 182. 
Tin veins, age of, in Cornwall, 615. 
Titanoferrite, 500. 
Torell, Dr., on ice-action in Greenland, 
172. 
-, on Swedish Cambrian fossils, 489. 
Touraine, faluns of, 211. 
Tourmaline, 500. 
Trachytic rocks, 505. 
-tuff, 506. 
-porphyry, 506. 
-^ lava, age of, 523. 
Trap, term defined, 498. 
-dike, intercepting strata, 518. 
-dikes, 513-517. 
-, intrusion of, between strata, 517. 
-rocks, ages of, 524-550. 
-rocks passing into granite, 559. 
-- tuff described, 508. 
Trappean rocks, nomenclature of, 497. 
-rocks, their relation to active volca¬ 
noes, 517. 
Trass of Lower Eifel, 535. 
Travertin, how deposited, 60. 
-, inferieur of Paris basin, 273. 
Tree ferns, living, 422. 
Trees erect in coal. Nova Scotia, 411. 
Tremadoc slates and their fossils, 482. 
Tremolite, 499, 502. 
Trenton limestone, fossils of the, 479. 
Trezza, volcanic rocks of, 529. 
Trias, beds of passage between lias and, 
366. 
-of England, 369-374. 
-of Germany, 375. 
-, Saurians of the, 370. 
