INDEX. 



683 



Silurian strata, foot-tracks in, 452. 



volcanic rocks, 55S. 



Simpson, Mr., on ice-islands, 135. 

 Siphonia pyrifonnis, upper frreensand, 249. 

 Siplionotreta unguiculata, Silurian, 444. 

 Sivatherinra, extinct ruminant, 182. 

 Skapter Jokul, eruption of, 521. 

 Skye, rocks of, 481, 580. 



, basaltic columns in, 4S3. 



, dikes in Isle of, 478. 



, sandstone in, 36. 



Slates of Devon, cleavage of, 603. 



Slaty cleavage, 602. 



Sllckensidos, term defined, 621. 



Smith, Mr., of Jordan Hill, on pleistocene, 



140. 

 Snags, fossil, 375. 



Snakes' eggs, fossil at Tonna, near Gotha, 125. 

 Soissonnais sands, 228. 

 Solenhofen, lithographic stone of, 802. 

 Solfatara, decomposition of rocks in the, 595. 

 Somma, 525. 



lava at, 478. 



Sopwitb, Mr. T., models by, 57. 



SorbA^, Mr., on mechanical theory of cleavage, 



«13. 

 Sortino, cave in valley of, 160. 

 South Devon and Cornwall, old red of, 419. 

 South Do'.vns, vicAV of, 274, 

 Sowerby, Mr. G., cited, 169. 

 Spaccoforno, inland cliffs at, 76. 

 Spain, volcanoes in, 6, 531. 

 Spalacotherium, Purbeck mammifer, 295, 457. 

 Spatangui (recent), 23; & 7'adiatus, 238. 



-with Serpula attached, 23. 



Spezzia, gulf of, calcareous rocks in. 613. 

 Splicer exochuH mimfi, Wenlock, 436. 

 SphceruUtes agariciformis, chalk, 253. 

 Sphennpteris erenata, 361 ; 8. gracilis, 264. 

 Spirifer dis'iunctits, S. Verneuilii, 421; aS', 



glaher, S. trigonalis, 406. 

 mucrrnatus, 424; S. undulatus, 352; S. 



Walcottii, 318. 

 SpiroUna stenostoma, eocene, 227. 

 SpirorMs carbonnriu^, coal, 334. 

 Spitzbergen, glacfiers of, 142. 

 Spondylus ■■ipin osic'^, chalk, 247. 

 Sponges in chalk, 249. 

 Spongilla of Lamarck, in tripoli, 25. 



, spicula of tripoli, 25. 



Spring?, mineral. See Mineral springs, 626. 



Staflfa, basaltic columns in, 483. 



Stauria astrmcBformis, Silurian, 403. 



Steno on classification of rocks, 91. 



Sternbergia, structure of, 3C8. 



Stigmaria in fossil forest. Nova Scotia, 877. 



Stigmaria and SigiUaria, 367. 



.... ficoides. coal, 868. 



Stirling Castle, rock of, altered by dike, 481. 



Stockholm, post-pliocene beds near, 119. 



Stokes, Mr., on petrifaction, 43. 



Stonesfielcl, fossil mammalia, 310, 312. 



.... slate, 309. 



Storton Hill, footprints at, 337. 



Strata, term defined, 2. 



arrangement of, determined by fossils, 21, 



22. 

 ...., consolidation of, 34. 



, curved and vertical, 47, 53. 



. . . , elevation of, above the sea, 44. 



, fossiliferous, tabular view of, 104. 



, horizontality of, 15, 45. 



...., metamorphic origin of 596. 



, mineral composition of, 10. 



, outcrop of 56. 



...., tertiary classification of, 109. 

 Stratification, forms of, 18, 16, 47. 



, unconformable, 59. 



Strickland, Mr., a|^_ new red sandstone, 836. 

 Strike, term explained, 53. 

 Stringocephalus Burtini^ Devonian, 423. 

 Stromboli, lava of, 574. 



Strophomena depressa, 436 ; S. grandis, 440. 

 Studer, M., on Swiss Alps, 614. 



Studer, M., on boulders of Jura, 149. 



Stutchbury, Mr., cited, 324, 355. 



Sub-Apennine strata, 110, 178. 



Subsidence in drift-period, 141. 



Succinea amphibia, 29 ; S. elongata, 124. 



Suffolk crag, 16S. 



Sullivan, Capt., chart of Falkland Islands, S8. 



Superga, near Turin, tertiaries of Hill of, 179. 



superior, Lake, marl in, 36. 



Superposition of aqueous deposits, 96. 



Superposition of volcanic rocks, test of age, 



826. 

 Supracretaceons., term explained, 108. 

 Sus serofa, tooth of, 166. 

 Sussex marble, 261. 

 Swansea, coal-measures near, 859. 

 . . . ., stems of SigiUaria at, 3T3. 

 Sweden, alum-schists of, 451. 

 Swiss Jura, structure of, 55. 

 Sydney coal-field, Cape Breton, 880. 

 Syenite, 564. 

 Syenitie granite, 564. 

 Synclinatline, term defined, 48. 



Table Mountain, strata horizontal in, 45. 



, granite-veins in, 567. 



Table of fossiliferous strata, 104 



Tails of homocercal and heterocercal fish, 853, 



Talcose gneiss, 590. 



gi-anite, 564. 



Tapinos Americanus (recent), tooth of, 166. 



Tartaret, Puy de, cone of 548. 



Teeth of mammals, fossil and recent, 165, 166, 



167, 219, 233, 811, 341. 

 Telerpeton Elginense, old red, 412. 

 Tellina obliqua, pleistocene, 155. 

 Temnechinus eacavatus, coralline crag, 172. 

 Tenerifi'e, Peak of, 509, 511. 

 Tentaculites annulatus, Silurian, 4S9. 

 Terebellum, convolutum, T.fusiforme, 213. 

 Terebratula {Atrypa) affinis, 434. 

 Mplicata, T. carnea, T. Dejrancii, T. 



octoplicata, T. pUcatilis, T. pumilus, 246. 

 .... digona, 308 ; T. fimbria, 315 ; T. hastata, 



406 ; T. lyra, 251. 

 navicula, 431 ; T. porrecta, 423 ; T. sella, 



259 ; T. Wilso?ii, 438. 

 T«redina personata, fossil wood bored by, 



Teredo navalis boring wood, 24. 

 Terra del Fuego, 145. 

 ..... Focus gigantens in, 242. 

 Tertiary, term" explained, 109. 



dejwsits, 178, 189, 190. 



sta-ata, tabular view of 104. 



Testudo atlas, of Sewalik Hills, 182. 



Texas, chalk in, 255. 



Thames valley, freshwater deposits in, 152. 



Thamnastrcea, coral-rag, 803. 



Thanet sands described, 221. 



Thecodont saurians, 342, 355. 



Thecodontosatirus, tooth of, 355. 



Thecosmilia annularis, 303. 



Thelodus, shagreen-scales of, 432. 



Thirria, M., on oolitic group in France, 829. 



Thuja occidentalis, in stomach of mastodon, 



144. 

 Thurmann, M., cited, 55, 280, 308. 

 Tilestones, 430. 



Tilgate Forest, remains in, 262. 

 Till, term explained, 138. 



, origin of, 134. 



Tin, veins of, in Cornwall, 620, 627. 

 Tiverton, trap-porphyry near, 555. 

 Tongrian system of M.Dumont, 188. 

 Touraine, faluns of, 175. 

 Trachyte, 466. 



, of Hungary, 565. 



Trachytic rocks, older than basalt, 522. 



Transition, term explained, 91, 429. 



Trap, term explained, 460. 



.... dike in Fifeshire, 557. 



. . . ., globular structure of, 486. 



, intrusion of, between strata, 482. 



