564 
INDEX. 
relations of the Lower Silurian rocks in 
the west of, 38; Upper Llandovery 
rocks of, 88 ; Upper Silurian Passage- 
beds in, 549 ; rocks of, 106. 
Shumard, Dr. B., 223, 342, 432, 433. 
Siberia, gold in, 454 ; Palaeozoic rocks of, 
17. 
Sibyl Head, 176. 
Sidlaw Hills, 251. 
Sierra Morena, 416. 
Silesia, Permian rocks of, 323. 
Sille le Guillaume, 408. 
Silurian fossils of America, 446, 546 ; Bri- 
tain, table showing the vertical range of 
the, 507. 
Silurian life, 186-242, 477. 
Silurian region, Cambrian rocks of the 
typical, 24 ; igneous rocks of the, 49, 76, 
537 ; Lower Silurian rocks of the typi- 
cal, 37. 
Silurian rocks, absence of Phosphoric acid 
from rocks below the, 28, 537 ; general 
succession of, 15. 
Silurian rocks of Anticosti, 436, 545 ; Ba- 
varia, 371 ; Bohemia, 371 ; Britain, 37- 
148 ; thickness of the, 184 ; British 
North America, 434; Cornwall, 145; 
Cumberland and Westmoreland, 146 ; 
France, 407 ; Ireland, 172 ; Lancashire 
and Yorkshire, 146 ; Marloes Bay, Pem- 
brokeshire, 143; Norway, 348; Por- 
tugal, 420 ; Eussia, 355 ; Scotland, 148 ; 
Spain, 415; Sweden, 346; the Harz, 
391 ; the Isle of Man, 148 ; the Ehenish 
Provinces, 394 ; the United States, 427 ; 
Thuringia, 383. 
Silurian system established, 5. 
Silurian system, Primordial zone the base 
of the, 480. 
Silurian, transition from Lower to Upper, 
85; transition to the Old Bed Sand- 
stone, 136, 549. 
Simpson, Mr. A., 862. 
Siphonotreta Anglica, 226. 
micula, 51. 
Skatschkof, M. C, 18. 
Skiddaw slates, 146. 
Claty cleavage, 32. 
Slieve Bloom Mountains, 174. 
Slimonia acuminata, 162. 
Slimon, Mr. E., 160, 236. 
Smith, Mr. W., 4, 35, 329. 
Smyth, Mr. W. W., 72, 450, 451. 
Snowdon, Bala-beds of, 41. 
Snowdon range, section across the, 84. 
Soimanofsk Mines in the Ural Mountains, 
455 
Sorby,' Mr. H. C, 34, 305. 
South America, 469 ; Palaeozoic rocks of, 
424. 
South Australia, gold in, 463. 
Southern Uplands of Scotland, 149, 172. 
Sowerby, Mr. J. de C, 133, 186. 
Spain, Palaeozoic rocks of, 17, 415. 
Sphaerexochus mirus, 235. 
Sphaeronites (Caryocystites)munitus, 191. 
Sphseronites (Echinosphaerites) granatus, 
191. 
punctatus, 191. 
Spirifer alatus, 339. 
disjunctus (S. Verneuilii), 279. 
striatus, 299. 
Spiriferen-Sandstein, 393. 
Spitzbergen, geology of, 323, 368, 543; 
supposed Permian fossil from, 368, 543. 
Stackpole rock, 289. 
Staffordshire, Carboniferous rocks of, 288 ; 
Permian rocks of, 333. 
Starfishes from the Lower Ludlow rocks, 
127 ; Lower Silurian rocks, 191 ; Upper 
Silurian rocks, 225. 
Steenstrup, Prof., 221. 
Stephen, Mr. Gr. M., 463. 
Stevenson, Mr. T., 149, 153, 158. 
Stincher Eiver, Ayrshire, 155. 
Stinkstein, 316. 
Stiper Stones, fossils from the west side 
of the, 48 ; section across the, 26 ; struc- 
ture of the, 37. 
Stokes, Mr., 440. 
Strachey, Col. E., 18. 
Strangways, Hon. W. Fox, 345. 
Strathmore, 251. 
Strephodes vermiculoides, 220. 
Strickland, Mr. H., 97, 138, 214, 241, 246, 
368, 398. 
Stringocephalus Burtini, 278. 
Stromatopora, Foraminiferal character of 
the Silurian, 547. 
Stromatopora striatella (S. concentrica), 
218. 
Strophalosia caperata, 279. 
lamellosa, 339. 
Strophomena antiquata, 227. 
compressa, 90. 
expansa, 193. 
funiculata, 227. 
grandis, 68. 
imbrex, 227. 
pecten, 227. 
tenuistriata, 68. 
Strzelecki, Dr., 18, 460, 461. 
Stutchbury, Mr. S., 461. 
Stygina latifrons, 174. 
Murchisoniae, 51. 
Stylonurus Symondsii, 246. 
Styria, Palaeozoic rocks of, 369. 
Sutherland, Dr., 440. 
Sutherland, Duchess of, sketch by, 170. 
Sutherlandshire, geology of, 166 ; Lauren- 
tian rocks of, 9 ; Old Eed Sandstone of, 
253 
Swallow, Mr., 342. 
Sweden, Silurian rocks of, 346. 
Swimbridge, 272. 
Symonds, Eev. W. S., 45, 92-94, 97, 112, 
136, 240, 247. 
Syringopora bifurcata, 120. 
