Vol. 56.] 



GENEKAL INDEX. 



777 



Subterranean, see Underground. 



Suffolk, Eed Crag contrasted w. that 

 of Essex, 719 et segq. 



Suma, see Soma. 



Supi*a-articular foramen in Omitho- 

 rhynchus-skvll, 642 & figs. 



Suttonian, use of term discussed, 

 744. 



Sweden (S.), correlat. of Upper Silur. 

 w. that of Welsh Borderland, 400. 



Swinyard Hill (Malvern), geol. struct, 

 of, 139-40; sect, across, 141. 



Switzerland, Geol. Surv. map pre- 

 sented, lxxxix. 



Tahua (N. Z.), obsidian from, 495-96 

 & pi. xxvii. 



Talatuoya (Ceylon), crystall. limest. 

 of, 600. 



Tantalite, 528. 



Tarannon Shales of Builth district, 

 374; of Long Mountain, 387; of 

 Dee Valley, 397, 398. 



Tasmania, diabase intrusive into 

 Permo-Carb. rocks of Frederick 

 Henry Bay, 333-36 & pi. xxii. 



Tattingstone (Suffolk), sect, to Lowe- 

 stoft, 734. 



Tauranga Bridge (N.Z.), pumice-tuff 

 from, 495. 



Teall, J. J. H., elected President, 

 xxiv; quoted, 557, 591. 



Teleki Valley, see Kenya, Mt. 



Tertiary conglomerates, etc. in neighb. 

 of Laraaca salt-lake, 747. See also 

 Kainozoic. 



Tessellated quartz, see Quartz-mosaic. 



Thalenite, 523-24. 



Thanet Sand, proved at Zool. Gardens, 

 v. 



Theodiscus sp. (Upper Chalk), 697 & 

 pi. xxxvii. 



Thermal springs in Gilgit, 353. 



Theropsida, new group proposed, 641, 

 645. 



Thomas, H. H., on Undescr. Tri- 

 lobites in Oxford Univ. Mus., 

 616-19 w. fig. & pis. xxxiv-xxxv. 



Thorium, occurr. of, 525-26. 



Thrust-plane & its connection w. 

 Cornish earthquakes, 6; thrust- 

 planes at Scarlet Point, fig. on 

 p. 14. 

 Time, geological, post-Glacial erosion 

 nr. Loch Lochy affordg. possible 

 basis of estimate, 201-203. 



Time-relations of sound & shock in 

 Cornish earthquakes, 6. 



Tinguaite (?) of Mt. Kenya, 210. 

 Tinker's Hill (Malvern), sect, across 

 Herefordshire Beacon and, 141. 



Q.'J. G. S. No. 224. 



Tintagel (Cornwall), monazite found 



at, 530. 

 Tomen-y-Meirw (N. Wales), Upper 



Silur. E. of, 398. 

 Tonalite, see Quartz- diorite. 

 Tornquist, S. L., elected F. M., xcii. 

 Torridonian of Longmynds, 296-97 & 



pi. xx. 

 Tourmaline-bearing rocks in Bunter 



pebble-beds of Midlands, 292, 293, 



294 ; tourmaline in Eed Crag, 742. 

 Trachytes of Waterford coast, 661 & 



figs., 664 et segq., 675. 

 Tramore Bay (Waterford), felsitic 



rocks of, 658-60 ; diabase of, 672. 

 Trecoed (Builth district), sect, to 



Wern Fawr, 382. 

 Trefnant (Long Mt.), Lr. Ludlow, etc. 



betw. Middletown and, 441-42. 

 Tremaen (Builth district), sect, thro' 



Aberedw Hill to Penwaun Pool, 



437. 

 Tretocalia pezica, gen. et sp, nov., 



62-63 & pi. iv. 

 Trewern Brook (Long Mt.), Wenlock 



Shales, etc. of, 388-91 w. map & 



table of graptol. 

 Trias, proved in Brabourne boring, 



lxxxiii ; relats. of, to Haffield 



Breccia & older rocks of Malvern 



& Abberley Hills, 185-89 & figs. ; 



Trias in Gilgit, 364. 

 Trichodiscus sp. (Upper Chalk), 698 



& pi. xxxvii. 

 Trickett, O., see David, T. W. E. 

 Tridymite in Mataura tuff, 497, 498 ; 



(?) in Waihi obsidian, 500. 

 Trigonactiira armata, sp. nov., 699 & 



pi. xxxvii. 

 Trigonocyclia spp. a & fi (Upper 



Chalk), 698 & pi. xxxvii. 

 Trilobites, undescr., in Oxford Univ. 



Mus., 616-19 w. fig. & pis. xxxiv- 



Trilonche sp. (Upper Chalk), 697 & 

 pi. xxxvii. 



Trust Funds, statement of, xxxviii- 

 xxxix. 



Trwyn Bychan (Anglesey), faulted 

 quartz-vein in cliff at, 246 & fig. 



Trwyn-y-Parc Limestone, Slates, & 

 Grits in N. Anglesey, 238 et segq. 



Tufaceous rhyolites fr. Waitekauri & 

 Mataura, 497. 



Tuffs of Mt. Kenya, 216 ; fr. N. Zea- 

 land, 494-95, 497; on Waterford 

 coast, 659 et segq. w. figs. See also 

 Pumice-tuffs. 



Turbinacis, gen. nov., 38-39. 



erythrcEcnsis, sp. nov., 39 & figs. 



Turonian limest. of Somaliland, 43. 



