soo 



INDEX. 



Snowdon, volcanic tuffs of, TOO. 



Soissonnais sands, 304. 



Solenhofen, fossils in lithographic stone of, 



395. 

 Soliatara, decomposition of rocks in the, 



741. 

 Somma, sahlband at, 612. 



cone and dikes of, 662. 



Sopwith, Mr. T., models by, 57. 



Sorby, Mr., on ripple-marks in mica-schist, 



756. 



on bydrothermal action, 706. 



on slate cleavage, 751. 



South Devon, Old Red of, 535. 

 South Downs, transverse valley, 362. 



view of, 360. 



Sontli Joggins, stigmaria and sigillaria at, 



4T5. 



section of cliffs at, 485. 

 forno inland cliffs, 76. 

 Spain, volcanoes in, 6. 

 Spalacotherium, Purbeck, 406. 

 Spanish volcanoes, age of, 672. 

 Spatangus radiatus, Chalk, 316. 



with Serpula attached, 23. 



Species, antiquity of living, 195. 



of Upper and Lower Cretaceous, 344. 



of plants common to Older Miocene and 



flora of CEningen, 260. 



variations of, 215. 



Specific gravity of basalt and trachyte, 599. 

 Spezia, Gulf of, calcareous rocks, 759. 

 Bphcerexoehus minis, Silurian, 559. 

 Spliazrulites agariciformis, Chalk, 337. 

 Sphenopteris gracilis, Wealden, 351. 



crenata, Carboniferous, 468. 



Spicula of sponge, Atlantic mud, 320, 

 Spirifer trigonalis, & glaber, Mountain Lime- 

 stone, 518. 



disjunctus, Devonian, 537. 



— — mucronatus, 541. 



Walcotli, Lower Lias, 418. 



undtdatus, 460. 



Spirolina stenostoma. Eocene, 303. 

 Spirorbis carbonarius, 493. 

 Spondylus spinosus, Chalk, 327. 

 Sponge in flint (Chalk), 330. 

 Spongilla, spicula of, in tripoli, 25. 

 Springs, mineral. See Mineral Springs. 

 Staffa, columnar basalt of, 616. 

 Stalactite, origin of, 123. 

 Starfish of Lower Ludlow, 555. 

 Sta/wria astraia>formis, Silurian, 515. 

 Steuo, on classification of rocks, 86. 

 Stereognathus described, 409. 

 Sternbergia, structure of, 477. 

 Stigmaria in coal-measures, 468. 



■ ficoides, Coal, 476. 



and Sigillaria, 475. 



Stirling Castle, rock of, altered by dike, 615. 



Stiper-stones group, 567. 



Stockwerk, assemblage of veins, 768. 



Stokes, Mr., on petrifaction, 43. 



Stone weapons at Geneva, 111. 



Stonesfield slate, composition and fossils, 405. 



Strata of Kyson, 294. 



arrangement of, determined by fossils, 21, 



22. 



consolidation of, 34. 



contortions of, in Cyclopian Isles, 659. 



contorted, in drift. 156. 



curved and vertical, 47, 58. 



elevation of, above the sea, 44. 



fossiliferous, tabular view of, 102. 



horizontality of, 15, 45. 



infraliassic, of Austrian Alps, 435. 



Lacustrine, of the Cantal, 229. 



Lower Miocene, of England, 239. 



Lower Miocene, of France, 217. 



metamorphic, origin of, 736. 



mineral composition of, 10. 



Miocene, of Italy, 247. 



Miocene, of Belgium, 236. 



Miocene, of Bordeaux, 231. 



Miocene, of France, 212. 



Strata, Miocene, of Switzerland, 248. 



Newer Pliocene, of England, 196. 



Older Pliocene, of England, 200. 



outcrop of, 56. 



Post-pliocene, 107. 



prominence of harder, 864. 



Eecent, 107. 



Silurian, of Europe, 569. 



Subapennine, 208. 



table of New York Devonian, 543. 



term defined, 2. 



Upper Miocene, of Gers, 232. 



Stratification, unconformable, 60. 



forms of, 13, 16, 47. 



unconformable, 59. 



Striae, production of, 139. 



Striation of rocks, 139. 



Strickland, Mr., on Posidonia minuta, 443. 



Strike, term explained, 53. 



String ocephalus Burtini, 539. 



Stromboli, lava of, 719. 



Strophomena grandis, Silurian, 563. 



depressa, Silurian, 558. 



Strozzi, Marquis, on Upper Miocene flora 



210. 

 Structure, columnar and globular, of volcanic 



rocks, 616. 



jointed, of metamorphic rocks, 747. 



metamorphic, origin of, 743. 



Studer, M., on gneiss of Jungfrau, 761. 



on boulders of Jura, 143. 



Subapennine strata, 208. 

 Subdivisions of Bembridge beds, 282. 

 Submergence of North America, 165. 



and reelevation of land in Scotland, 152. 



Succession, order of, in metamorphic rocks, 



764. 

 Succinea ampjkibia, 29. 



elongata, Ehine, 119. 



Suess, M., on Hallstadt fossils, 436. 



on Koessen beds, 435. 



on Vienna basin, 244. 



Suffolk, crag of, 196, 200. 



Superga, near Turin, tertiaries of hill of, 



209. 

 Superior, Lake, marl in, 36. 

 Superposition of aqueous deposits, 96. 



of Catalonian rocks, 673. 



test of age of volcanic rocks, 655. 



Supracretaceous, term defined, 99. 



Sus scrofa, molar of, 134. 



Sussex marble, 348. 



Swanage, fossil mammalia found at, 381. 



Swansea, coal-measures at, 467. 



Sweden, Cambrian of, 581. 



Swiss pile-dwellings, 110, 111. 



Jura, structure of, 55. 



Switzerland, age of metamorphic rocks in, 



760. 



lake-terraces of, 120. 



lake-dwellings, 110. 



Miocene strata of, 248, 266. 



fossil plants of Lower Miocene of, 260. 



Sydney coal-field, Cape Breton, 489. 

 Syenite, formation of, 708. 

 Syenitic granite, 708. 



gneiss, 736. 



Symonds, Eev. "W. S.. on Moel Tryfaen shells, 



158. 

 Synclinal line, term defined, 48. 



Table Mountain, strata horizontal in, 45. 



granite veins in, 711. 



Table of fossil vertebrata, 588. 



from Portland-stone to Lower Greensand, 



392. 



of Devonian series, 536. 



of French Eocene strata, 297, 298. 



of Limburg beds, 237, 238. 



of New York Devonian strata, 543. 



of Silurian rocks, 550, 551. 



of minerals analyzed, 608. 



of Cambrian and Laurentian strata, 575, 



576. 

 of Eocene formations, England, 281. 



