﻿Vol. 
  53-] 
  

  

  GENERAL 
  INDEX. 
  

  

  643 
  

  

  Porphyrite 
  (?), 
  crushed, 
  fr. 
  Wadi 
  Om 
  

  

  Nabadi, 
  369. 
  

   Porphyritic 
  diabase 
  fr. 
  Nubian 
  De- 
  

   sert, 
  367. 
  

   Porth 
  Gwyfen 
  (Anglesey), 
  section 
  

  

  descr., 
  354. 
  

   Portland, 
  I. 
  of, 
  Cycadeoidea 
  gigantea 
  

  

  from, 
  22-38 
  figs. 
  & 
  pis. 
  i-v. 
  

   Portraine 
  Inlier 
  (Co. 
  Dublin), 
  520- 
  

  

  539 
  figs. 
  & 
  pis. 
  xlii-xliii 
  (section 
  

  

  & 
  map). 
  

   Post-Numraulitic 
  age 
  of 
  Cutch 
  late- 
  

   rites, 
  237. 
  

   Postlethwaite, 
  J., 
  exhibits 
  vole, 
  bomb, 
  

  

  v. 
  

   Pothole 
  w. 
  rounded 
  boulders, 
  in 
  Wadi 
  

  

  Om 
  Eisha, 
  363 
  fig. 
  

   Prasopora 
  Grayce, 
  84. 
  

   Pre-Cambrian, 
  geol. 
  & 
  biol. 
  history 
  of, 
  

  

  lxv-xeii 
  ; 
  rocks 
  of 
  Anglesey, 
  349. 
  

   Pre-Cretaceous 
  (?) 
  conglom. 
  in 
  Nubian 
  

  

  Desert 
  S.E. 
  of 
  Korosko, 
  362. 
  

   Pre-Glacial 
  drift 
  of 
  Newbury, 
  420. 
  

   Prescelly 
  Hills 
  (Pembroke), 
  igneous 
  

  

  rocks 
  of, 
  465-476 
  & 
  pi. 
  xxxvi 
  (mi- 
  

  

  crosc. 
  sections). 
  

   Pressure-effects 
  shown 
  in 
  rocks 
  fr. 
  

  

  Nubian 
  Desert, 
  372. 
  

   Prestwicii, 
  J., 
  obituary 
  of, 
  xlix. 
  

   Prestwich 
  bequests, 
  i. 
  

   Priest's 
  Chamber 
  (Portraine), 
  530; 
  

  

  thrust-conglom. 
  at, 
  532 
  fig. 
  ; 
  diagr. 
  

  

  of 
  cliff 
  at, 
  533. 
  

   ' 
  Primary 
  injection, 
  ' 
  gneiss 
  of, 
  in 
  

  

  Anglesey, 
  353, 
  354 
  fig. 
  

   Primitia 
  M'Coyi, 
  67, 
  537. 
  

   Pseudo-breccia 
  assoc. 
  w. 
  Rauenthal 
  

  

  serpentine, 
  260. 
  

   Psilomelane 
  (?) 
  in 
  Yellow, 
  Sandst. 
  of 
  

  

  Hillsport, 
  574 
  & 
  tables 
  ii-iii. 
  

   Pterincea 
  stibfalcata, 
  var., 
  81. 
  

   Ptilodictya 
  costellata, 
  77. 
  

  

  recta, 
  77. 
  

  

  Pumice 
  fr. 
  Baluchistan, 
  302. 
  

   Purbeck 
  Beds 
  of 
  Portland, 
  Cycadeoi- 
  

   dea 
  gigantea 
  from, 
  22-38 
  figs. 
  & 
  pis. 
  

  

  i-v. 
  

   Purley 
  Boulder 
  exhibited, 
  xciii 
  ; 
  

  

  comp. 
  w. 
  Betch 
  worth 
  boulders, 
  213, 
  

  

  217, 
  220. 
  

   Pyrites 
  in 
  Antrim 
  Cretac. 
  rocks, 
  572 
  

  

  et 
  segq. 
  & 
  tables 
  ii-iii. 
  

   Pyroxene, 
  monoclinic, 
  chem. 
  anal, 
  of, 
  

  

  407. 
  

   1 
  Pyroxene-granulites 
  ' 
  of 
  Madras 
  

  

  Presidency, 
  405, 
  406. 
  

   Pyroxenic 
  minerals, 
  altered, 
  in 
  rocks 
  

  

  fr. 
  Nubian 
  Desert, 
  371. 
  

   Pyrrhotite, 
  nickeliferous, 
  of 
  Sudbury 
  

  

  district, 
  40, 
  51, 
  52. 
  

  

  Quartz 
  corroding 
  hornblende, 
  etc., 
  

   303, 
  306 
  & 
  pi. 
  xx 
  ; 
  vein-q. 
  fr. 
  Abu 
  

   Sinaiyat, 
  370, 
  372 
  ; 
  q. 
  surrounded 
  

   by 
  aureoles 
  of 
  augite-microliths, 
  493 
  

   & 
  pi. 
  xxxvii 
  ; 
  graius 
  in 
  Antrim 
  Cretac. 
  

   rocks, 
  569 
  et 
  seqq. 
  & 
  tables 
  ii-iii. 
  

  

  Quartz-conglomerates 
  (O. 
  B. 
  S.) 
  in 
  

   Ballydouane 
  Bay, 
  274, 
  275; 
  of 
  

   Kennedy's 
  I. 
  & 
  Knockmahon, 
  281. 
  

  

  Quartz-diorite 
  fr. 
  Nubian 
  Desert, 
  367. 
  

  

  Quartz-syenite 
  fr. 
  Baluchistan, 
  303 
  & 
  

   pi. 
  xx 
  (microsc. 
  sections). 
  

  

  Quartzites, 
  Huronian, 
  nr. 
  Sudbury, 
  

   43. 
  

  

  ' 
  Quartzite-reefs 
  ' 
  of 
  Cutch, 
  243. 
  

  

  Radiolarian 
  chert 
  fr. 
  Franz 
  Josef 
  

  

  Land, 
  511. 
  

   Bafinesquina 
  deltoidea, 
  71. 
  

  

  (?) 
  var. 
  undata, 
  71. 
  

  

  expansa, 
  70. 
  

  

  Rainfall 
  in 
  Baluchistan, 
  293 
  ; 
  in 
  

  

  Nubian 
  Desert, 
  363, 
  376 
  ; 
  formerly 
  

  

  greater 
  (?) 
  in 
  Cotteswold 
  area, 
  626. 
  

   Raised 
  beaches 
  of 
  Varanger 
  Fiord, 
  

  

  147-151 
  ; 
  in 
  Franz 
  Josef 
  Land, 
  

  

  508. 
  

   Raisin, 
  C. 
  A., 
  Nat. 
  & 
  Orig. 
  of 
  Rauen- 
  

  

  thal 
  Serpentine, 
  246-268 
  fig. 
  & 
  pis. 
  

  

  xvi-xvii 
  (map 
  & 
  microsc. 
  sections) 
  ; 
  

  

  Petrol, 
  of 
  Nubian 
  Desert 
  S.E. 
  of 
  

  

  Korosko, 
  364-373. 
  

   Ran 
  of 
  Cutch, 
  239 
  et 
  seqq. 
  

   Rauenthal 
  (Vosges), 
  nat. 
  & 
  orig. 
  of 
  

  

  serpentine 
  of, 
  246-268 
  fig. 
  & 
  pis. 
  

  

  xvi-xvii 
  (map 
  & 
  microsc. 
  sections). 
  

   Rayside 
  Station 
  (Ontario), 
  altered 
  

  

  rocks 
  nr., 
  53. 
  

   Reade, 
  T. 
  Mellard, 
  on 
  Glacio-marine 
  

  

  Drift 
  of 
  Vale 
  of 
  Clwyd, 
  341-347 
  

  

  w. 
  section 
  & 
  pi. 
  xxv 
  (map). 
  

   Reading 
  Beds 
  nr. 
  Newbury, 
  422. 
  

   Red 
  Rocks 
  nr. 
  Bunmahon, 
  269-288 
  

  

  figs. 
  

   Reed, 
  F. 
  R. 
  C, 
  Fauna 
  of 
  Keisley 
  

  

  Limest., 
  67-105 
  & 
  pi. 
  Yi 
  ; 
  Red 
  

  

  Rocks 
  nr. 
  Bunmahon 
  on 
  Coast 
  of 
  

  

  Co. 
  Waterford, 
  269-286 
  figs. 
  ; 
  on 
  

  

  Foss. 
  fr. 
  Portraine 
  Inlier, 
  535-538. 
  

   Regenerated 
  granites, 
  44. 
  

   Registan 
  sand-desert, 
  290. 
  

   Reid, 
  Clement, 
  Bigsby 
  Medal 
  awarded 
  

  

  to, 
  xlvii 
  ; 
  on 
  Pleistoc. 
  Plants 
  fr. 
  

  

  Casewick, 
  Shacklewell, 
  & 
  Grays, 
  

  

  463-464. 
  

   Beussianum-zone, 
  see 
  Chalk 
  Rock. 
  

   Reynolds, 
  S. 
  H., 
  & 
  Gardiner, 
  C. 
  I., 
  

  

  an 
  Account 
  of 
  the 
  Portraine 
  Inlier 
  

  

  (Co. 
  Dublin), 
  520-535 
  figs. 
  & 
  pis. 
  

  

  xlii-xliii 
  (section 
  & 
  map). 
  

   Rhaetic 
  Beds 
  at 
  Colin 
  Glen, 
  548-549. 
  

  

  