﻿iv 
  TABLE 
  OF 
  CONTENTS. 
  

  

  Page 
  

  

  Croll, 
  Dr. 
  James. 
  On 
  prevailing 
  Misconceptions 
  regarding 
  the 
  

  

  Evidence 
  which 
  we 
  ought 
  to 
  expect 
  of 
  former 
  Glacial 
  Periods 
  . 
  220 
  

  

  Donald, 
  Miss. 
  Descriptions 
  of 
  some 
  new 
  Species 
  of 
  Carboniferous 
  

  

  Gasteropoda. 
  (Plate 
  XX.) 
  619 
  

  

  Dunlop, 
  Dr. 
  Andrew. 
  On 
  the 
  Jersey 
  Brick-Clay 
  118 
  

  

  Ethertdge, 
  R., 
  Esq., 
  and 
  Henry 
  Willett, 
  Esq. 
  On 
  the 
  Den- 
  

   tition 
  of 
  Lepidotus 
  mcunmus, 
  Wagner, 
  as 
  illustrated 
  by 
  Speci- 
  

   mens 
  from 
  the 
  Kimeridge 
  Clav 
  of 
  Shotover 
  Hill, 
  near 
  Oxford. 
  

   (Plate 
  XV.) 
  " 
  356 
  

  

  Gregory, 
  J. 
  W., 
  Esq. 
  Cystechinus 
  crassus, 
  a 
  new 
  Species 
  from 
  the 
  

   Radiolarian 
  Marls 
  of 
  Barbados, 
  and 
  the 
  Evidence 
  it 
  affords 
  as 
  

   to 
  the 
  Age 
  and 
  Origin 
  of 
  those 
  Deposits 
  640 
  

  

  Groom, 
  T. 
  T., 
  Esq. 
  On 
  a 
  Tachvlyte 
  associated 
  with 
  the 
  Gabbro 
  of 
  

  

  Carrock 
  Fell 
  in 
  the 
  Lake 
  District, 
  (Plate 
  XII.) 
  298 
  

  

  Hatch, 
  Dr. 
  F. 
  H. 
  Notes 
  on 
  the 
  Petrographical 
  Characters 
  of 
  

  

  some 
  Hocks 
  collected 
  in 
  Madagascar 
  by 
  the 
  Rev. 
  R. 
  Baron. 
  . 
  . 
  . 
  340 
  

  

  Hill, 
  Rev. 
  E. 
  The 
  Rocks 
  of 
  Alderney 
  and 
  the 
  Casquets 
  380 
  

  

  Hill, 
  W., 
  Esq., 
  and 
  A. 
  J. 
  Jukes-Browne, 
  Esq. 
  The 
  Occurrence 
  

   of 
  Colloid 
  Silica 
  in 
  the 
  Lower 
  Chalk 
  of 
  Berkshire 
  and 
  Wilt- 
  

   shire 
  403 
  

  

  Hinde, 
  Dr. 
  G. 
  J. 
  On 
  Arcliceocyathus, 
  Billings, 
  and 
  on 
  other 
  Genera, 
  

   allied 
  to 
  or 
  associated 
  with 
  it, 
  from 
  the 
  Cambrian 
  Strata 
  of 
  

   North 
  America, 
  Spain, 
  Sardinia, 
  and 
  Scotland. 
  (Plate 
  V.) 
  .... 
  125 
  

  

  Jennings, 
  A. 
  Vaughan, 
  Esq., 
  and 
  G. 
  A. 
  J. 
  Cole, 
  Esq. 
  The 
  

  

  Northern 
  Slopes 
  of 
  Cader 
  Idris 
  422 
  

  

  Johnstone, 
  Alex., 
  Esq. 
  On 
  the 
  Action 
  of 
  Pure 
  Water, 
  and 
  of 
  

   Water 
  saturated 
  with 
  Carbonic 
  Acid 
  Gas, 
  on 
  the 
  Minerals 
  of 
  

   the 
  Mica 
  Family 
  363 
  

  

  Judd, 
  Prof. 
  J. 
  W. 
  On 
  the 
  Growth 
  of 
  Crystals 
  in 
  Igneous 
  Rocks 
  

  

  after 
  their 
  Consolidation. 
  (Plate 
  VII.) 
  175 
  

  

  . 
  The 
  Tertiary 
  Volcanoes 
  of 
  the 
  Western 
  Isles 
  of 
  Scotland 
  . 
  187 
  

  

  Jukes-Browne, 
  A. 
  J., 
  Esq., 
  and 
  W. 
  Hill, 
  Esq. 
  The 
  Occurrence 
  

   of 
  Colloid 
  Silica 
  in 
  the 
  Lower 
  Chalk 
  of 
  Berkshire 
  and 
  Wilt- 
  

   shire 
  40 
  

  

  Lamplugh, 
  G. 
  W., 
  Esq. 
  On 
  the 
  Subdivisions 
  of 
  the 
  Speeton 
  Clay 
  575 
  

  

  Lydekker, 
  R., 
  Esq. 
  On 
  the 
  Remains 
  and 
  Affinities 
  of 
  five 
  Genera 
  

  

  of 
  Mesozoic 
  Reptiles. 
  (Plate 
  H.) 
  41 
  

  

  