774 



GENEEAL INDEX. 



[Nov. 1900, 



Pollard, W., chem. anal, of kental- 



lenite, 537. 

 Poolvash (I. of Man), sect. fig. & 



descr., 15-17 ; limest.-knolls at, 



21-22. 

 Porbandar Stone (Kathiawar), 566, 



587 & pi. xxxii. 

 Port Darwin (S. Austral.), nat. 



gold pseudomorph. after wood, 



xcii. 

 Porth Llanlliana (Anglesey), Llan- 



deilo rocks W. of, 236. 

 Porth Padrig (Anglesey), Llandeilo 



rocks of, 237 ; sect. fr. Cemaes Bay 



to, pi. xiv, fig. 1. 

 Porth Pridd (Anglesey), Llandeilo 



rocks at & E. of, 237. 

 Porth Wen Bay (Anglesey), Llandeilo 



rocks betw. Hell's Mouth and, 234- 



35 ; sect, along E. side of, etc., 241- 



42 & pi. xiv, fig. 3. 

 Porth-yr-Ysgraff (Anglesey), ser- 

 pentine of, 249, 250. 

 Portraine (Ireland), effects of earth- 



movem. ou vole, rocks of, 21. 

 Portugal, Geol. Surv. map presented, 



xcv. 

 Post-Carboniferous intrusions in N. 



Anglesey, 255. 

 Post-Eocene, foundering of, 44, 45. 

 Post-Liassic faults in Malvern & 



Abberley Hills, 180-93. 

 Post-Ordovician age of intrus. rocks 



of Waterford coast, 690. 

 Post-Triassic granites of Gilgit, 364. 

 Potash- & potash-soda felsites, see 



Felsites. 

 Pre-Cauibrian age of Old Radnor 



Series, 514-15. 

 Pre-Carboniferous rocks proved in 



East Anglian borings, etc., lxxxiii ; 



pre-Carb. age of intrus. rocks of 



Waterford coast, 690. 

 Pre-Permian intrusions in N. Angle- 

 sey, 255. 

 Prestwich, Lady, obituary of, lxi. 

 Prestwich, Sir Joseph, extract from 



his will, x-xi. 

 Prickley Farm (Abberley Hills), sect. 



to Hodge Hill, 169. 

 Priest, B. W., quoted, 50 etseqq. 

 Pringle, W., quoted, 646. 

 Prionastrcea crassisejjta, sp. nov., 34 



& pi. i. 

 Prior, G-. T., Wollaston Fund Award 



to, xiv ; quoted, 207, 209 et seqq. 

 Procoloplwn, compar. w. Aristodesmus, 



621 et seqq. 

 Progressive crystallization, determg. 



factor in magmatic differentiation 



of certain basic rocks, 540. 



Prunoidea fr. Upper Chalk of Couls- 

 don, 697, 703 & pi. xxxvii. 



Pseudodiadema somaliense, sp. nov., 

 41-42 & figs. 



Pseudospherulitic felsites of Water- 

 ford coast, 682. 



Pseudo-unconformity, see Uncon- 

 formity. 



Pumice-tuff fr. Waihi, 494 ; fr. 

 Tauranga Bridge. 495 ; siliceous, 

 fr. Kotorua, 502-503. 



Pumiceous rhyolite-tuff fr. Waihi, 

 494. 



Purbeck Beds, their thickness & 

 extent in London Basin, etc., lxxx- 

 lxxxi. 



Purpura lajrillus, new var. fore- 

 shadowed, 717. 



Purvis, G., quoted, 717. 



Pyroclastic rocks of Mt. Kenya, 216. 



Pyroxeue-granulites of Ceylon, 592- 

 95 w. fig. & pi. xxxiii ; centric 

 structures in same, 606-607. 



Pyroxenite of Lecher, 346-47 ; age 

 of same, 364. 



Quartz, ' amoeboid structure ' of, 342 

 & pi. xxiii, 347 ; solvent action of, 

 341-42, 343, 365-66 & pi. xxiii ; 

 occurr. in Bed Crag, 742. 



Quartz-calcite micropegmatite, 605, 

 606 & pi. xxxiii. 



Quartz-diorite of Beinn Chas, 544-45 

 & pi. xxxi ; of Kandy, 598. 



Quartz-felspar grits in Bunter pebble- 

 beds, 289. 



Quartz-mosaic in Gilgit granites, 341- 

 42, 343, 367 & pi. xxiii. 



Quartz-norite of Ceylon, 599. 



Quartz-porphyry of Knockane Strand, 

 666. 



Quartzites in N. Anglesey, their 

 assoc. w. limest., rapid variat. in 

 thickness, & relationship to con- 

 glom., 244-45 ; quartzites in 

 Bunter pebble-beds of Midlands, 

 289-90. 



Radiolaria fr. Upper Chalk of Couls- 

 don, 694-704 & pis. xxxvii- 

 xxxviii. 



Radiolarian chert-pebbles of Cannock 

 Chase, 293 & pi. xx. 



Ragedara (Ceylon), pyroxene-granu- 

 lites of, 593-95 w. fig. & pi. xxxiii ; 

 normal granulites of, 597 ; vein- 

 graphite of, 609-10 w. fig. 



Raheen Bridge (Waterford), neck of 

 non-vole, material, 670-71. 



Rainfall, its influence on Larnaca 

 salt-lake, 753-55. 



