Tra 



392 



Trawsfynydd (Merioneth), section to 



Cynicht, iii. 143. 

 Tread (=terrace-step), xvii. 402, 403. 

 Trebich (Illyria) *grotto, iv. (Part 2) 60. 

 Trees, foss., fr. Staffs Coal Measures, i. 



46; in Sydney (C.B.) C. M., ii. 393-396, 



vi. 128-132 tigs. ; erect, in Nova Scotian 



C. M., x. 16 et seqq. & figs. ; struct, of 



same, x. 37, 38 figs. See also Sigillaria. 

 Tree-trunks, agents in floating boulders, 



xiv. 262 ; in post-Tert. sands at Heading, 



xxxvi. 301. 

 Treffgarn Bridge (Pembroke), xli. 477 ; 



section to N. of Ford Bridge, xxxv. 288 ; 



do. in quarry S.E. of, xli. pi. xv. ; halle- 



flintas of, xxxv. 287, 292, xlii. 361 ; pre- 



Cambr. of, xlii. 354 ; rock-specims. descr., 



xlii. 358. 

 Tregartb (Caernarvon), section to Felin 



Hen, xlviii. 253. 

 Treginnis (Pembroke), porphyry-crags of, 



xlvi. 257. 

 Treglemais (Pembroke), quartz-felsite of 



Bryn, xxxv. 290, 294. 

 Treglynn Common (Cornwall), hornbl. 



rock of, xxxiv. 484 & pi. xxii. 

 Tregoning Hill (Cornwall), elvan of, xxxi. 



336. 

 Tregorrick (Cornwall), so-called 'blue 



elvan ' of, xxxiv. 475. 

 Tregwyn (Cornwall), xlix. 213. 

 Treig, Loch (Inverness), section to Glen 



Lyon, xvii. 265 ; glac. action around, 



xviii. 169 et seqq.; view of N. entrance, 



xviii. 171 ; Tr. Glen, ancient glacier of, 



xix. 247 et seqq. 

 Treiorwerth (Anglesey), list of May Hill 



foss., xxxvi. 239; synclinal of, xl. 572, 



573 w. map; section to Ty Hen, fr. 



Archaean W. of, descr., xl. 574. 

 Trelissick Creek (Cornwall), elvan of, xxxi. 



337. 

 Tremadoc (Caernarvon), geol. of neighb. 



of, ii. 70-75 ; section nr., iii. 139 ; 



crustac. tracks in Lingula-Fl&gs nr., x. 



208-211 fig. 

 Tremadoc Group, iii. 157 ; in neighb. of 



St. "David's & its foss. contents, xxix. 



39-52 w. map & pis. iii.-v (foss.), xxxi. 



169; occurr. nr. Wrekin, xxx. 196; 



(Upper) classed w. Arenig, xxxi. 175 ; 



occurr. of phosphates in, xxxi. 370 



et seqq. ; Tr. G. in Anglesey, xxxvi. 



238 ; in Moelwyn district, xlvii. 369 ; 



Tr. age of erupt, rocks of Cader Idris, 



xlv. 438, 439 ; equiv. in Bohemia, xxxvi. 



602; (Lr.), Bryograptus Callavei & 



earliest lamellibr. in, xxxvii. Proc. 66; 



Cyrtoceras prcecox in, xxxvii. Proc. 67 ; 



Dendrocrinus cambrensis in, xxxvii. 



Proc. 72 ; (Lr. & Upper), posit. & 



char, of rocks & their fauna, xxxvii. 



Proc. 85 ; numer. anal, of foss., xxxvii. 



Proc. 98. 

 Tremadoc Slates, iii. 140, 145, viii. 145, 



148; iron-ore in, viii. 148; fauna of, 



xix. p. xxxviii ; relat. to beds above & 



below, xix. pp. xxxviii et seqq. 



Trematis, gen. no v., iv. 66-69 figs. 



cancellata, iv. 68. 



jtlosa, iv. 69. 



punctata, iv. 69. 



terminalis, iv. 68 figs. 



Trematosaurus, relats. w. Brachyops, xL 

 38. 



Trembling Mt. (Canada), section across r 

 xxi. 47. 



Tremola Schists, xlii. Proc. 72 et seqq. 



Tremolite in Connemara, xxii. 507, 510 ; in 

 altered Conist. Limest., xlvii. 313, 314 

 & pi. xii. 



Trench, R., obituary of, xix. p. xxix. 



Trenewth (Cornwall), so-called ' blue elvan ' 

 of, xxxiv. 480 w. chem. anal. & pi. xx 

 (microsc. section). 



Trent (S. Tyrol), ^dolomites, etc. nr., xiii. 

 (Part 2) 23. 



Trent River, at Newark, section to Peter- 

 borough, xxiv. 160 ; do. to sea-cliff 

 beyond Aldborough, xxiv. 160; do. to 

 Chalk Wolds of N. W. Lines, xxxi. 116 ; 

 Tr. Valley, list of Lr. Liass. foss. fr., 

 xxxi. 122 ; Tr. Basin, gravels of, xxxviii. 

 681, xxxix. 607 ; Pleistoc. success, in 

 same, xlii. 437-480 figs. & map ; modern 

 course of river, xxxix. 608 ; divers, of, 

 xxxix. 608. 



Trenton Group (Lr. Silur.) in Hastings 

 Co., xxv. 264 ; of Ottawa, Asaphus w. 

 limbs fr., xxvi. 479 & pis. xxxi.-xxxii., 

 486-488 figs. 



Trenton Limestone (Lr. Silur.) in Canada, 

 viii. 205, ix. 84, 86 et seqq. w. list of 

 foss., xvii. 439 ; in N.Y. State, xiv. 343, 

 430; recurr. foss. in, xiv. 421; fauna 

 of, xv. 282. 



Trepeevet (Pembroke), halleflintas of, xxxv. 

 289, 293. 



Trerice Quarry (Cornwall), elvan of, xxxi. 

 337, 338 & pi. xvi. 



Trescott (Staff's), Criffel & other boulders 

 at, xxix. 358. 



Tretio (Pembroke) , section to E. of Aber- 

 pwll, xxxi. pi. viii. 



Tretoceras, gen. nov., bisiphonatum, xiv. 

 177-179 & pi. xii. 



Trevelyan, W. C, Fractured Boulders 

 at Auchmithie, i. 147-148 ; [Glacier 

 Marks in N. Wales], i. 300. 



, Supp. Borings of Lithodomous 



Mollusca [abs.], xxvii. 231. 



, obituai-y of, xxxvi. Proc. 36. 



Trewint (Cornwall), so-called ' blue elvan ' 

 of, xxxiv. 485 w. chem. anal. 



TriacantJiodon, dentit. comp. w. that of 

 Triconodon, xxxvii. 378. 



Triarthrus Beckii, w. antenna, 1. 425, 426, 



Trias in Alps of Tyrol, etc., v. 164-170, 

 diagr. facg. xlix. 47 ; in Venet. Alps, vi. 

 423 et seqq. ; *Alpine, gasterop. fr., xii. 

 (Part 2) 24 ; in Thiiringerwald, xi. 428 ; 

 in Harz, xi. 446; age of Dumfries & 

 Corncockle Muir sandst., vii. 163 ; rain- 

 prints in, vii. 242-244 ; pseudomorphs 

 after rock-salt in, ix. 5, 187 ; Diptero- 

 notus fr. Bromsgrove, x. 369; *corals 



