764 



GENERAL INDEX. 



[Nov. 1 900, 



Cyrtograpttis Linnarssoni, 413 & pi. 



xxiv ; zone of, in Builth district, 



377 ; in Long Mountain district, 



388-89 ; in Dee Valley, 399. 

 Lundgreni, 410 fig., 413 & 



pi. xxiv ; zone of, in Builth district, 



379-80, 381-83, 384 ; in Long Mt. 



district, 389-91, 392-93, 394. 

 Murchisoni, 413 & pi. xxiv; 



zone of, in Builth district, 374-75 ; 



in Dee Valley, 398. 

 rigidus, 409-10 w. fig. & 



pi. xxiv ; zone of, in Builth district, 



379, 381 ; in Long Mt. district, 389, 



392, 394. 

 symmetricus, sp. nov., 410-11 



& pi. xxiv ; zone of, in Builth 



district, 376-77. 

 Cyrtoidea fr. Upper Chalk of Couls- 



don, 700-703 & pis. xxxvii-xxxviii. 



Dahnania, see Phacops. 



Dalnatrat (Argyll), kentallenite of, 

 533. 



Datnbulla (Ceylon), microcline-gneiss 

 of, 600-601. 



Darkot Pass (Kashmir), rocks betw. 

 Gilgit, Yasin, and, 356-58. 



David, T. W. E., on Evid. of Glaciat. 

 in Permo-Carb. of N.S.W., viii. 



Davison, C, on Cornish Earth- 

 quakes of March 29th to April 2nd 

 1898, 1-7 & map. 



Dawson, Sir J. William, decease an- 

 nounced, ii ; obituary of, liv-lv. 



Ddol Shales, 78-80, 86, 97-98. 



Dee Valley (N. Wales), Wenlock 

 Shales, etc., of, 397-99 w. map & 

 table of graptol., 446. 



Vend/rods sp., 38. 



Dendrites, tormat. of, vi. 



Derivative mollusca of Red Crag, 

 726-27. 



Devon (& Cornwall) not a source of 

 Midland pebble-beds, 298-99. 



Dewlish (Dorset), 'eoliths' from, 

 exhibited, xcvi. 



Diabase of S.E. coast of Jersey, 308, 

 316, 318 ; intrusive into Permo- 

 Carb. rocks of Frederick Henry 

 Bay, 333-36 & pi. xxii ; diab. of 

 Waterford coast, 658 et seqq., 671 

 et seqq. w. figs., 684. 



Diatoms in Rotorua sinter, 503, 510. 



Dicolocapsa sp. (Upper Chalk), 701 & 

 pi. xxxvii. 



Dicrcmozygoma leptoscclus, gen. & 

 sp. nov., fr. Cape Colony, 646-56 

 w. fig. & pi. xxxvi. 



Dictyomitra multicostata, 701 & 

 pi. xxxviii. 



Dictyomitra pagoda, sp. nov., 702 & 

 pi. xxxviii. 



regularis, 702 & pi. xxxviii. 



tiara, sp. nov., 701 & pi. xxxviii. 



spp. a, (5, y, d, e, & £, 702, 703 & 



pi. xxxviii. 



Dicy?wdo?i,-beds at Sneeuwberg, 332. 



Differentiation of S.E. Jersey rocks 

 fr. a single magma, 319 ; of Argyll- 

 shire intrusive rocks fr. a single 

 magma, 551 et seqq. 



Dingle (Malvern), sect, across range 

 N. of, 151. 



Dingle Mill (Long Mt.), Wenlock 

 Shales, etc. of, 391. 



Diorites of Gilgit, 347, 348-49, 350, 

 356 ; of Argyllshire, their relat. to 

 kentallenites ibid., 541-47 w. map ; 

 of Ceylon, 598; of Waterford 

 coast, 684, 688. 



Dioritic rock of Fort Regent, 317. 



Diplograptus magnus, sp. nov., 132- 

 34 & figs. 



modestus, 135 ; D.-m. Flags in 



Rhayader district, 77, 86. 



Discoidea fr. Upper Chalk of 

 Coulsdon, 697-700, 703 & 

 pis. xxxvii-xxxviii. 



Dobar Limestone (Neocomian), 43. 



Doderlein, L., quoted, 50. 



Dog's Bay (Galway), foraminiferal 

 deposits of, 576-78 w. map, 588. 



Dol-lfor farm (Rhayader), Silur. 

 sequence of, 108-109 ; sect, above, 

 fr. Allt-y-bont to old quarry, 106. 



Dolerite of La Saline, its solution by 

 granite, 321-22, 324; doler. of 

 Ceylon, 598 ; intrus. on Waterford 

 coast, ,674, 684-85. 



Dolomite in Gilgit, 355. 



Dolyhir Ry.-station (Shropshire), 

 altered Wcolhope Limest. of, 

 516-17. 



Domoid gneiss of Ceylon, 600. 



Dondra Head (Ceylon), pyroxene- 

 gran ulite of, 595. 



Doneraile Cove (Waterford), felsite, 

 etc. of, 659, 675, 678, 688. 



Double refraction develop, by opal- 

 silica, 506. 



Dovercourt (Essex), Red Crag, etc. 

 near, 718. 



Dowkeb, G., obituary of, lv-lvi. 



Downton Sandstone in Abberley 

 Hills, 167 et seqq., 172-73. 



Drift-gravels at West Wickham 

 (Kent), 8-10 ; drift at West 

 Malvern, etc., 154-55; gem- 

 bearing, ir Ceylon, 592. 



Dudley (Shi pshire), Lr. Ludlow of, 

 447. 



