814 
the boulders dispersed over the, in 
connexion with the former existence 
of glaciers in Forfarshire, 344. 
Sierra Almagrera, Mr. Lambert on mine- 
ral veins in the, 318, 
Sierra de Gador, Mr. Lambert on the lead 
mines of, 319. 
Silurian system, Prof. Sedgwick and Mr. 
Murchison on the, of the Rhenish pro- . 
vinces, 304; Mr. Murchison, M. de 
Vernewil and Count Keyserling’s ac- 
connt of, in Russia in Europe, 399,717; 
in the Ural mountains, 745 ; notices of, 
by Mr. Tiyell, near Aymestry and Wen- 
lock, 468; near Christiania, 465. 
Silvertop (Brigadier C.), notice of, in 
the President’s Address for 1849, 259. 
Sizewell Gap, notice of Mastodon teeth 
found at, 10. 
Smith (J. Hsq.), on the climate of the 
newer pliocene period, 118; on the 
tertiary and post-tertiary formations of 
the basin of the Clyde, 149; on the 
Island of Madeira, 3851; on the ter- 
tiary beds of the Tagus, 462. 
Smith (Mr. W.), notice of, in the Presi- 
dent’s Address for 1840, 248. 
Snails, Dr. Buckland on the agency of, 
in corroding compact limestone rocks, 
430; observations ey by Dr. Moore, 
590. 
Snow (Mr.), notice of, in the President’s 
Address for 1842, 639. 
Somerset, Mr. Williams on the sreywacke 
of, 115, 158. 
Sopwith (T. Esq.), on the illustration of 
geological phenonmiena by means of 
models, 351. 
South America, Mr. Darwin on the dis- 
tribution of erratic boulders, es on 
contemporaneous deposits in, 425. 
South Carolina, description ef tertiary 
formations in, 736. 
South Wales, Mr. Logan on some cha- 
~ racters’ in the coal-field of, 275. 
Southern Africa, notice of trap recks in, 
102; of a fossil skull of an ox found 
in, 152. 
Southern India, notice of fossils found 
in, 792. 
Sowerby (Mr. J.), reply of, to the Presi- 
dent, on receiving the award of the 
proceeds of the Wollaston Fund, 
209. 
Spratt (Mr.), on the geology of the Island 
of Rhodes, 773. 
Stevenston, on tertiary and post-tertiary 
deposits at, 444. 
Stigmaria in under-clay of coal seams 
Mr. Logan’s account of, in South 
Wales, 275, in Pennsylvania, 709, 710 ; 
notice of, in Nova Scotia and Cape 
INDEX. 
Breton Island, 712; Mr. Lyell’s obser- 
vations on the, of Pennsylvania, 55. 
Stirling, remarks on» the evidence of 
former existence of glaciers near, 386. 
Stonesfield, deseviption by Mr. Owen of 
the EHylacotherium and Phascolothe- 
rium jaws found at, 5,17 5 remarks on 
the jaws by Mr. Ogilby, 21; Prof. 
Whewell, 86. 
Storeton, account of Cheirotherium foot- 
steps in quarries at, 12, 14; of im- 
pressions of rain-drops; 99. 
Strait of Magellan, on the erratic boul- 
ders and the contemporaneous (ascii 
of the, 427. 
Strath Harn, proofs of glaciers in, 335. 
Strathmore, Mr. Lyell on evidences of 
former existence of glaciers in; 341. 
Strickland (H. C. Esq.), on the eeology 
of the line of the Birmingham and 
Gloucester railway, 313; ‘additionat 
remarks, 446; on the bone-bed, 585, 
732. 
Studd Hill, account of change in the ap- 
pearances of, 166. 
Sudbourne, notice of bed of Echini in 
the crag of, 10. 
Suffolk, My. Lyell on the age of the crag 
of, 126. 
Superficial deposits, account of, near 
Birmingham, 731. 
Syria, account of specimens from, 291. 
Tagus, My. Smith on the tertiary beds 
of the, 462. 
Tar porley, notice of Cheirotherium foot- 
steps found at, 15. 
Taylor (J. jun., Hsq.), on a slab of Sand- 
stone exhibiting footmarks, 100. 
Taylor (R. C. Esq.), notice of his model 
of the Pottsville coal-district, 556: 
Taymouth, moraines near, noticed, 384. 
Tcehornoi Zem, account of the black earth 
or, of Russia, 712. 
Temperature, remarks on the, of well- 
water near Delhi, 732. 
Tertiary formations, description of, by 
Mr. Sharpe, near Lisbon, 29; by Mr. 
Hamilton, in Asia Minor, 104, and the 
Island of Rhodes, 295; account of, by 
Mr. Smith, in Scotland, 118, 149, in 
Madeira, 358, on the ‘banks of the 
Pagus, 462; by Mr. Lyell, in Canada, 
119, in Norfolk and Suffolk, 126, in 
the Cotentin and Faluns, 487, in the 
United States, 735; by Mr. Bower- 
bank, in the Isle of Wight, 125; by 
Mr. Murchison, M. de Verneuil and 
Count Keyserling, in Russia, 404, 728 ; 
by Mr. Landsborough, in Ayrshire, 
444; by Mr. Spratt, in the Island of 
Rhodes, 774 by Mr. SEE in 
Egypt, 788. 
