Vol. 55-] 



GENERAL INDEX, 



791 



Thorpe Fell (Yorks), limest.-knolls & 



shale of, 359, 360. 

 Three Crowns (Spitsbergen), 682, 688. 

 Throgmorton Street (London), Palseo- 



lith. implemts. from, xcii. 

 Thrust-planes indie, by Craven Faults, 



351-353 ; thrust - planes, post- 



Cambr., in Glenelg, 374. 

 TiDDEMA^, E. H., exhib. specims., 



Ixxxviii ; quoted, 327, 328 et seqq. 

 Tideswell Dale (Derby), sill & faulted 



inlier in, 239-250 figs. & pis. xix- 



XX (map & microsc. sects.). 

 Tiers-Duron torsion-system (S.Tyrol), 



626-627. 

 Tipperary County, pseudo-foss. fr. 



Silur. of, ii. 

 Tissington cutting (Derby), 226-229 



& pis. xvii-xviii (sects.) ; sponge-spi- 



cules in Carb. Limest. of, 716-717. 

 Titula (Atlas Mts.), evid. of glacial 



action, 202. 

 Tizi Likumpt (Atlas Mts.), sect, to 



Taghnowt, 204. 

 Toadstone, definition of term, 238; 



see also Dolerite, Lavas. 

 Todtalp (Davos district), serpentine 



of, 392, 407. 

 Tonbridge (Kent), Hemiomus major, 



gen. & sp. nov. from, 413-415 figs. 

 Torsion-structure of Dolomites, 560- 



634 figs. & pi. xl (map). 

 Torsional eruptivity in Alpine areas, 



628. 

 Totaigite, chem. anal, of, 373. 

 Tourmaline, see Schorl-rock Pebbles. 

 Trachytes in Atlas Mts., 209, 

 Tramore (Waterford), Lr. Palseoz. of, 



726-733 w. sects. & lists of foss. 

 Tramore Limestone Series, 740, 742 ; 



correl. w. Ortkoceras-\\me?,'i. etc. of 



Scandinavia & Esthonia, 767-769. 

 Tramore Slates, 740, 742. 

 Tramoria -punctata, gen. & sp. nov., 



758-760 & pi. xlix. 

 Trappoid breccia, Upper Perm, age 



of, 102, 103. 

 Tremadoc age of basal Protozoic in 



Central Anglesey denied, 643. 

 Triactiscus lanceola, sp. nov., 53 & 



pi. ix. 

 Trias, relat. of Upper Perm, to, in Lr. 



Severn Basin, 102 ; Tr. of Stourton, 



monotreme (?) footpr. from, Ixxxix ; 



Tr. sandst. of Chase End Hill, 149 ; 



Tr. of Davos district, 385-389; 



Tr. success, in S. Tyrol, 560-562. 

 Trilonche, gen. nov., 47. 



elegans, sp. nov., 48 & pi. viii. 



Pittmani, sp. nov., 48 & pi. viii. 



vetusta, sp. nov. & var. a, 48 & 



pi. viii. 



Trinidad (W.I.), Oceanic deposits of, 

 177-189 w. map, vert, sects. & chem. 

 anal. 



Trinucleits hibernicus, 744-745. 



Trochodiscus (?) duhius, sp. nov., 218 

 & pi. xvi. 



planatus, sp. nov., 53 & pi. ix. 



Trust Funds, statement of, xxxvi- 

 xxxvii. 



Trwyn Pen-careg (Anglesey), crush- 

 conglom. of, 659-660. 



Trwyn y Pare (Anglesey), foldg. of 

 rocks at, 652, 664. 



Tuckhill (Shropshire), Middle Perm. 

 of, 103 & table. 



Tufa, calcareous, in S. Morocco, 195, 

 196. 



Tufaceous rhyolites of Bodlondeb, 

 173; do. of Waikino & Waihi, 

 458, 459 ; tuf. limest. above thick 

 ash, betw. Ashbourne & Crake Low, 

 225 et seqq., 235-236; limest. of 

 Congleton Edge, 551, 557-558. 



Tufis in radiolar. series of N.S.W., 

 20 e^ seqq., 34, 42; felsitic, nr. Con- 

 way, 170-176 w. map & sect. ; thin, 

 tuffs in Carb. rocks betw. Ashbourne 

 & Crake Low, 225 et seqq., 235-236 ; 

 tuff in Tideswell Dale, 245, 248 & 

 pi. XX (microsc. sect.) ; & agglom. 

 in Carb. Limest. Series of Congleton 

 Edge, 548-559 w. map & sects.; 

 Ordov. of Waterford coast, 725 et 

 seqq., 765-766. 



Turdus merula (?) fr. Ightham fissure, 

 420. 



Tyrone & Londonderry granites, age 

 of, 273-275 figs. 



Unconformity, proof of, in N. Angle- 

 sey, 648-650. 



Underground waters, varying com- 

 posit. of, Ixxiv. 



Upper Scar Limestone, correl. of, 350, 

 362. 



Urika, Wad (Atlas Mts.), geol. of, 

 206 w. sect. 



Val di Mezzodi, see Pissadoi Ravine. 

 Val la Stries (S. Tyrol), structur. 



significance of, 591. 

 Vallbach (S. Tyrol.), fault-dykes & 



sills, 569-571. 

 Yalparola-Eisenofen Fault (S. Tyrol), 



621. 

 Valuation of property of Geol. Soc, 



XXX viii. 

 Van den Broeck, E., elected For. 



Memb., xcii. 

 Varda (S. Tyrol), tectonics of, 585. 

 Variolites of Davos district, 398. 

 Variolitic serpentine of Anglesey, 



