728 



GrENEKAL INDEX. 



Smittia anceps, 337. 



centralis, 337. 



, var. laevigata, 337. 



Tatci, 337. 



Snowdon and Beddgelert, Mr. F. 

 Rutley on devitrified rocks from, 

 403. 



Soilcap-motion, Mr. R. W. Coppinger 

 on, 348. 



Sollas, Prof. W. J., on Adroconia 

 Granti, a new Lyssaldne Hexacti- 

 nellid from the Silurian formation 

 of Canada, 254. 



, on a new species of Plesiosaurus 



(P. Conybeari) from the Lower Lias 

 of Charmouth, with observations on 

 P. megacephalus, Stutchbury, and 

 P. brachycephalus, Owen, 440. 



Solway, section from the, to near 

 Brampton, 296. 



Solway Moss, section from, to Dalston, 

 293. 



Somerset, Mr. J. Buckman, on some 

 Ammonites from the Interior Oolite 

 of Dorset and, 57. 



South Thompson valley, British Co- 

 lumbia, 275. 



Spheeroceras Brongniarti, 596. 



dimorphum, 598. 



Gervillii, 597. 



■ Mantellii, 597. 



polymorphum, 598. 



Wrightii, 598. 



Sphenonchus obtusus, 420. 



Spherulitic rock, devitrified, from 

 Beddgelert, 403. 



from the Lower Geyser 



basin, 395. 



from the Yellowstone dis- 

 trict, 394. 



Spinkwell quarry, constitution of 

 Coal-measme sandstone from, 11 ; 

 analysis of, 21. 



Spirophyton, 303. 



Stanwix, section through, 296. 



Stanwix marls, 292, 295. 



Stedd fa Gurig, section through, 159. 



Stephanoceras Braikenridgii, 595. 



Deslougchampsii, 594. 



Humphriesianum, 594. 



linguiferuin, 595. 



polymerum, 596. 



zigzag, 596. 



Stiper stone, constitution of, 7, 25. 



Stomatopora, Mr. F. D. Longe on 

 some specimens of, from the Wen- 

 lock limestone, Proc. 239. 



Stomatopora dissimilis, 615. 



fnnata, 615. 



Stomatoporas and Ascodictya, Mr. 

 G-. R. Vine on, 613. 



Stonyhough, constitution of coal- 

 measure sandstone from, 11. 



Stow-on-the-Wold, constitution of 

 Liassic sand from, 16. 



Strata Florida rock, 1 54. 



Struthiosaurus anstriacus, 628. 



Submerged forests, so-called, of West 

 Cumberland and North Lancashire, 

 37. 



Submergence, deposition of Moel-Try- 

 fan shelly beds during, 353. 



, Mr. D. Mackintosh on drift- 

 zones and probable variations in the 

 rate of, 357. 



, rate of, in Denbighshire, 362. 



Suess, Prof. B., on the Gosau beds of 

 the Neue Welt, west of Wiener 

 Neustadt, 702. 



Superficial geology of British Colum- 

 bia and adjacent regions, Dr. G. 

 Dawson on, 272. 



Swanage, Mr. B. W. Willett on a 

 mammalian jaw from the Purbeck 

 beds at, 376. 



Sweden, Mr. P. H. Carpenter on two 

 newCrinoids from the tapper Chalk 

 of Southern, 128. 



T'ang Shan, Mr. Carrall on some fossils 

 found in carboniferous rocks at, 83. 



Tan y graig, Pentraeth, structure of 

 crystalline limestone from, 236. 



Tau isa, Cemmaes, structure of crys- 

 talline limestone from, 236. 



Tawney, E. B., Esq., and H. Keeping, 

 Esq., on the beds at Head on Hill and 

 Colwell Bay in the Isle of Wight, 

 85. 



Teifi pools, section from, to Gwasta- 

 den, 159. 



Terraces in British Columbia, 274. 



Tertiary sandstones and grits, consti- 

 tution of, 18. 



Thames valley, sands of the, 19. 



Thecodontosaurus-bed of Durdham 

 Down, 73. 



Theriodontia, Prof. Owen on Mluro- 

 saitrus felinus, a new species and 

 genus of, 261. 



Thornbury railway, Secondary veins 

 on, 79. 



Thornby, section through, 296. 



Tilgate sandstone, constitution of, 16. 



Tolcsva, Hungary, deep red obsidian 

 from, 406. 



Tonnerre, map of the valley of the 

 Armancon, north of, 531. 



Tordoff point, section from, to the 

 fault south of Wigton, 296. 



Town Green, near Ormskirk, consti- 

 tution of sandstone from, 14. 



