﻿&ENERAX 
  INDEX. 
  

  

  ArchcBoeyathus, 
  Dr. 
  G-. 
  J. 
  Hinde 
  on, 
  

  

  125. 
  " 
  

   and 
  its 
  allies, 
  history 
  of, 
  126- 
  

  

  129 
  ; 
  mineral 
  nature 
  of, 
  129. 
  

  

  ichnusce. 
  132. 
  

  

  profundus, 
  131. 
  

  

  Archceoscyphm 
  ruing 
  anensis, 
  142. 
  

   Argillites 
  in 
  Permian 
  breccias 
  of 
  

  

  Leicestershire. 
  24, 
  25. 
  

   Argillochelys 
  cuneiceps, 
  236. 
  

   Ash, 
  Kent, 
  flint 
  implements 
  from 
  the 
  

  

  chalk-plateau 
  at, 
  285, 
  288. 
  

   , 
  Devon, 
  Tuff 
  of 
  the 
  Ashprington 
  

  

  volcanic 
  series 
  at, 
  373. 
  

   Ashby, 
  Permian 
  rocks 
  at, 
  10. 
  

   Ashprington 
  volcanic 
  series 
  of 
  South 
  

  

  Devon, 
  (the 
  late) 
  Mr. 
  A. 
  Champer- 
  

  

  nowne 
  on 
  the, 
  369. 
  

   volcanic 
  series, 
  rocks 
  of 
  the, 
  369; 
  

  

  relations 
  of 
  the, 
  with 
  Devonian 
  

  

  limestones 
  and 
  slates, 
  372. 
  

   AssiUna 
  spira. 
  332. 
  

   Astarte 
  (?) 
  Baroni, 
  336. 
  

  

  senecta, 
  616. 
  

  

  Astarte-beds 
  at 
  Speeton, 
  587. 
  

  

  Augite 
  crystal, 
  partially 
  surrounded 
  

  

  by 
  hornblende, 
  523. 
  

   in 
  basalts 
  of 
  Madagascar, 
  347, 
  

  

  348, 
  349, 
  350, 
  351. 
  

   Avicula 
  inasquivalvis, 
  615. 
  

  

  Bagshot 
  Beds, 
  Mr. 
  H. 
  G. 
  Lyons 
  on 
  

   the, 
  633. 
  

  

  Barbados, 
  Cystechinus 
  crassus, 
  a 
  new 
  

   species 
  from 
  the 
  Radiolarian 
  Marls 
  

   of, 
  640. 
  

  

  , 
  Scotland 
  formation 
  of, 
  645 
  ; 
  

  

  Radiolarian 
  deposits 
  of, 
  646 
  ; 
  Coral- 
  

   line 
  Limestone 
  of, 
  646. 
  

  

  Baron, 
  Rev. 
  R., 
  on 
  the 
  geology 
  of 
  

   Madagascar, 
  with 
  an 
  appendix 
  on 
  

   the 
  fossils 
  bv 
  Mr. 
  R. 
  B. 
  Xewton 
  

   305. 
  

  

  , 
  Dr. 
  F. 
  H. 
  Hatch 
  on 
  the 
  petro- 
  

  

  graphical 
  characters 
  of 
  some 
  rocks 
  

   collected 
  in 
  Madagascar 
  by 
  the, 
  

   340. 
  

  

  Basalt, 
  olivine-free, 
  with 
  porphyritic 
  

   hornblende, 
  from 
  Madagascar, 
  351. 
  

  

  , 
  felspar-free, 
  from 
  Madagascar, 
  

  

  352. 
  

  

  . 
  hornblendic, 
  from 
  Madagascar, 
  

  

  352. 
  

  

  Basaltic 
  dykes 
  in 
  the 
  Western 
  Isles, 
  

   200. 
  

  

  plateaux, 
  great, 
  formation 
  of, 
  by 
  

  

  ordinary 
  volcanic 
  action, 
  206. 
  

  

  Basalts 
  of 
  Madagascar, 
  346. 
  

  

  Basic 
  and 
  acid 
  rocks, 
  relative 
  posi- 
  

   tions 
  of, 
  in 
  the 
  Western 
  Isles, 
  199, 
  

   200. 
  

  

  Basic 
  dvkes 
  of 
  Xorth 
  Britain, 
  age 
  of 
  

   the, 
  209, 
  

  

  Bath 
  district, 
  Midford 
  Sands 
  of 
  the, 
  

   453. 
  

  

  , 
  section 
  through, 
  468. 
  

  

  Bather, 
  Mr. 
  F. 
  A., 
  on 
  Trigonocrinics, 
  

   a 
  new 
  genus 
  of 
  Crinoidea 
  from 
  the 
  

   ' 
  ; 
  Weisser 
  Jura 
  " 
  of 
  Bavaria, 
  with 
  

   the 
  description 
  of 
  a 
  new 
  species, 
  

   T. 
  Urates, 
  and 
  an 
  appendix 
  on 
  

   sudden 
  deviations 
  from 
  normal 
  

   symmetry 
  in 
  Xeocrinoidea, 
  149. 
  

  

  . 
  on 
  Marsupites 
  testudinarius, 
  

  

  172. 
  

  

  , 
  on 
  thebasals 
  of 
  Eugeniacrinidse, 
  

  

  359. 
  

  

  Bavaria, 
  Mr. 
  F. 
  A. 
  Bather 
  on 
  Trigo- 
  

   nocrinics, 
  a 
  new 
  genus 
  of 
  Crinoidea 
  

   from 
  the 
  "Weisser 
  Jura 
  '" 
  of, 
  149. 
  

  

  Bayshaw, 
  flint 
  implements 
  from, 
  283. 
  

  

  Beach 
  at 
  Speeton, 
  plan 
  of, 
  578. 
  

  

  Beaminster, 
  section 
  through, 
  468. 
  

  

  Bedford, 
  Sauropterygian 
  from 
  the 
  

   Oxford 
  Clay 
  near, 
  48. 
  *» 
  

  

  Beinn 
  F/aigh, 
  in 
  the 
  Isle 
  of 
  Mull, 
  

   section 
  of 
  the 
  rocks 
  forming 
  the 
  

   summit 
  of, 
  198. 
  

  

  Belemnites 
  jaculum. 
  611. 
  

  

  lateralis, 
  610. 
  

  

  minimus, 
  612. 
  

  

  Owenii, 
  610. 
  

  

  polygonalis, 
  333. 
  

  

  semicanaliculatus, 
  611. 
  

  

  jaculum, 
  zone 
  of, 
  at 
  Speeton, 
  

  

  592 
  ; 
  fossils 
  of 
  the, 
  597. 
  

  

  lateralis, 
  zone 
  of, 
  at 
  Speeton, 
  

  

  585: 
  fossils 
  of 
  the, 
  591. 
  

  

  minimus, 
  zone 
  of, 
  at 
  Speeton, 
  

  

  602; 
  fossils 
  of 
  the, 
  604. 
  

  

  semicanaliculatus. 
  zone 
  of, 
  at 
  

  

  Speeton, 
  599 
  ; 
  fossils 
  of 
  the, 
  602. 
  

  

  Belledonne 
  and 
  Grandes 
  Rousses 
  

   ranges, 
  section 
  of 
  the, 
  70. 
  

  

  range, 
  crvstalline 
  rocks 
  of, 
  

  

  71. 
  

  

  Berkshire 
  and 
  Wiltshire, 
  Messrs. 
  Hill 
  

   and 
  Jukes-Browne 
  on 
  the 
  occur- 
  

   rence 
  of 
  colloid 
  silica 
  in 
  the 
  Lower 
  

   Chalk 
  of, 
  403. 
  

  

  Betafo 
  valley, 
  Madagascar, 
  volcanic 
  

   district 
  of, 
  320. 
  

  

  Bewley 
  Farm, 
  flint 
  implements 
  from 
  

   near, 
  284. 
  

  

  Bigsbv 
  Medal, 
  award 
  of 
  the, 
  to 
  Mr. 
  J. 
  

   J. 
  Harris 
  TealL 
  Proc. 
  35. 
  

  

  Biotite, 
  analyses 
  of, 
  368. 
  

  

  , 
  white 
  mica 
  from, 
  487. 
  

  

  Biotite-gneiss, 
  granite-veins 
  in, 
  at 
  the 
  

   south 
  end 
  of 
  Swinyard's 
  Hill, 
  482. 
  

  

  Bisidnionea 
  tetragona, 
  var. 
  ovalis, 
  571. 
  

  

  Bituminous 
  Shales 
  of 
  the 
  Upper 
  

  

  