﻿04 



GENERAL INDEX. 



[Nov. 19 IO, 



Nenthead (Cumberland), sect, of 

 Eampgill Vein, 290 ; percentages 

 of lead & zinc in limest. at, 301- 

 302; chalcopyrite enveloped by 

 blende & galena at, 316 fig. 



Nentsbury Mine (Cumberland), strings 

 of native silver in galena at, 318 



%. 



Neolithic Epoch, lxxxviii. 



Nepheline-rocks in Nyasaland, 195. 



Nevis, Glen (Inverness), Aonach Beag 

 Core in, 604 fig. 



' Newer Granites ' of the Scottish 

 Highlands, 376 et seqq., 397 et 

 seqq. 



Newthorpe claypit (Notts), Palao- 

 xyris, &c. from , 330 et seqq. 



Newton, R. B., Notes on some Fossil 

 non-Marine Mollusca & a Bivalved 

 Crustacean (Estheriella) from Nyasa- 

 land, 239-48 & pis. xviii-xix 

 (pars). 



Nickeliferous pyrrhotite in norites of 

 Shire Highlands, 196. 



Nigeria (N.), granitic intrusions in, 

 399-400 ; riebeckite-granite from, 

 exhibited, lxxxix. 



Nilms armadillo, 273 & pi. xxii. 



Niobe sp., 272-73 & pi. xxii ; Niohe 

 Beds of Ynyscynhaiarn district, 

 155-56. 



Nkana area (Nyasaland), Karroo 

 formation in. 202-204 w. map. 



Noble, A. H., 140. 



Nodular felsite of Garrauagerra, 

 260. 



Novella licstraca, 105. 



Norites, nickeliferous, in Shire High- 

 lands, 196. 



' Norm ' in igneous rock-classification 

 defined, 495-96; its use defended, 

 496 et seqq., 505-506. 



1 Normative,' use of term, 496. 



Norris, F. E., exhibits earthquake 

 records, ii, v. 



North Downs, diagrammatic elevat. 

 of, 642 ; Pliocene deposits along, 

 647-48 ; N. D. & Wealden plana- 

 tion, 652 et seqq. 



Northamptonshire Toarcian, com- 

 pared w. that of Yorkshire & Dor- 

 set, 86-87. 



Nottinghamshire & Derbyshire Coal- 

 field, Palcsoxyris, &c. from, 329- 

 45 & pis. xxiv-xxvii. 



Number of Fellows, &c, ix, xx. 



Nyasaland, geology of, 189-237, 251- 

 52 figs.; fossils from, 237-51 & 

 pis. xviii-xix ; Nyasa Trough, phy- 

 siography of, 233-36. 



Nyika area, W. (Nyasaland), Karroo 

 formation in, 210-13 w. map ; sect, 

 across do., 218; Nyika (& Vipya) 

 plateaux, physiography of, 232-33. 



Obolus Beds, 156. 



Obsidianites fr. Australia, exhibited, 

 v. 



(Ecotraustes sjnniger, sp. nov., 95-96 

 & pi. xi. 



(Edania obscura, sp. nov., 96-97 & 

 pi. ix. 



Ogof - ddu (Carnarvonshire), sects, 

 descr., 153-54, 155. 



Oldham, B. D., [on J. W. Evans's 

 earthquake-model], 351-52. 



Olenellus Limestone of Comley, tri- 

 lobites from, 19 et seqq. & pis. iii- 

 viii. 



Olivine of Morpeth dyke-rock, 14 ; 

 olivine - dark - mica zone around 

 granite inclusion in dolomite, 511- 

 13 & pi. xxxv (microscop. sect.). 



Oolite-Lias strata of S. Dorset & 

 their correlation, 52-89 figs., 109- 

 10 ; see also Great Oolite, Inferior 

 Oolite. 



Ophicalcite zone around granite in- 

 clusion in dolomite, 514 & pi. xxxv. 



Order of deposition of vein-minerals, 

 313 et seqq., 320. 



Ordovician, igneous & assoc. sedi- 

 mentary rocks of Glensaul district, 

 253-80 figs. & pis. xx-xxii ; see also 

 Ynyscynhaiarn district, Arenig, 

 #c. 



Ore-deposition in lead & zinc veins of 

 Great Britain, problems of, 299- 

 328 figs. ; see also Metallogeny. 



Orthis obtusa, var., 277-78. 



parva, 278. 



Orthite in Bhodesian granites, 364. 



Orthoceras Limestone, Tourmakeady 

 Limest. correlat. with, 271-72. 



Osmotic theory of metarnorphism, 

 521. 



Oswald, F., 343. 



Outlier, metallogenetic, 292. 



Owslin Barn (Yorks), Carb. Limest. 

 at, 549-50 w. list of foss. 



Pacific (& Atlantic) ' rock-kindred,' 



475-78 w. chem. anals. 

 Pahang Volcanic Series, 427-28 ; 



Pahang Chert Series, 445, 446 et 



seqq. & pi. xxxi (microscop. sect.). 

 Pahoehoe type of lava, 628, 632-33 & 



pis. xlviii, 1, lii. 



