﻿ANNIVEESAEY 
  ADDEESS 
  OF 
  THE 
  PEESIDENT. 
  xlvii 
  

  

  way 
  in 
  which 
  rock-salt 
  is 
  likely 
  to 
  have 
  been 
  deposited 
  in 
  quantity 
  

   except 
  in 
  salt-lakes, 
  it 
  seems 
  to 
  me 
  that 
  in 
  the 
  occurrence 
  of 
  this 
  salt 
  

   we 
  have 
  evidence 
  of 
  the 
  upheaval 
  of 
  our 
  Bunter 
  beds 
  into 
  land, 
  which 
  

   remained 
  above 
  the 
  sea 
  for 
  an 
  indefinitely 
  long 
  period, 
  during 
  which 
  

   the 
  Muschelkalk 
  and 
  St. 
  Cassian 
  beds 
  were 
  deposited 
  elsewhere, 
  

   and 
  in 
  certain 
  inland 
  hollows 
  of 
  this 
  land 
  the 
  salt 
  was 
  precipitated 
  

   from 
  the 
  saturated 
  waters. 
  If 
  so, 
  it 
  is 
  just 
  possible 
  that 
  the 
  salt- 
  

   beds 
  may 
  be 
  partly 
  the 
  equivalents 
  of 
  the 
  missing 
  strata. 
  But, 
  

   however 
  this 
  may 
  be, 
  if 
  the 
  Bunter 
  beds 
  formed 
  land 
  surrounding 
  

   saturated 
  salt-lakes, 
  we 
  have 
  in 
  that 
  circumstance 
  a 
  good 
  reason 
  

   why 
  the 
  truly 
  marine 
  St. 
  Cassian 
  beds 
  and 
  Muschelkalk 
  should 
  be 
  

   absent 
  in 
  Britain. 
  

  

  Westbury 
  or 
  Bone-bed 
  series, 
  or 
  Kbssen 
  and 
  Rhcetie 
  beds. 
  — 
  I 
  now 
  

   come 
  to 
  those 
  members 
  of 
  the 
  British 
  secondary 
  rocks 
  which 
  are 
  

   essentially 
  fossiliferous 
  ; 
  and 
  before 
  entering 
  on 
  the 
  subject 
  I 
  wish 
  

   to 
  express 
  my 
  great 
  obligations 
  to 
  my 
  colleague, 
  Mr. 
  Etheridge, 
  with- 
  

   out 
  whose 
  wonderful 
  knowledge 
  of 
  secondary 
  species 
  and 
  their 
  range 
  

   in 
  time 
  it 
  would 
  have 
  been 
  impossible 
  for 
  me 
  with 
  accuracy 
  to 
  have 
  

   constructed 
  the 
  tables 
  on 
  which 
  much 
  of 
  my 
  reasoning 
  is 
  founded 
  *. 
  

  

  The 
  Bone-beds 
  were 
  considered 
  to 
  form 
  the 
  base 
  of 
  the 
  British 
  

   Lias 
  until, 
  in 
  the 
  year 
  1841, 
  they 
  were 
  declared 
  by 
  Sir 
  Philip 
  

   Egerton 
  to 
  form 
  part 
  of 
  the 
  Keuper 
  series, 
  in 
  consequence 
  of 
  the 
  

   generic 
  characters 
  of 
  certain 
  Fishes 
  which 
  they 
  enclose. 
  But, 
  not- 
  

   withstanding 
  this 
  correct 
  determination, 
  they 
  were 
  by 
  most 
  men 
  per- 
  

   sistently 
  classed 
  with 
  the 
  Lias, 
  until, 
  in 
  1860, 
  by 
  an 
  elaborate 
  ana- 
  

   lysis 
  of 
  the 
  Shells 
  of 
  these 
  strata 
  and 
  of 
  the 
  overlying 
  Lower 
  Lias, 
  

   Dr. 
  "Wright 
  again 
  demonstrated 
  their 
  intimate 
  relation 
  with 
  certain 
  

   Triassic 
  strata 
  of 
  the 
  Continent. 
  

  

  In 
  consequence 
  of 
  the 
  want 
  of 
  frequent 
  good 
  sections 
  at 
  the 
  base 
  

   of 
  the 
  Lias, 
  it 
  is 
  uncertain 
  how 
  far 
  these 
  Westbury 
  or 
  Kossen 
  strata 
  

   are 
  continuous 
  between 
  Lyme 
  Regis 
  on 
  the 
  south 
  and 
  the 
  coast 
  of 
  

   Yorkshire. 
  This 
  uncertainty 
  is 
  due 
  partly 
  to 
  the 
  soft 
  and 
  clayey 
  

   nature 
  of 
  the 
  strata, 
  but 
  especially 
  because 
  over 
  more 
  than 
  half 
  of 
  

   England 
  this 
  base 
  is 
  hidden 
  completely 
  by 
  the 
  northern 
  and 
  other 
  

   drifts. 
  The 
  chief 
  points 
  where 
  the 
  "Westbury 
  beds 
  have 
  been 
  recog- 
  

   nized 
  are 
  — 
  Lyme 
  Regis, 
  in 
  Dorsetshire; 
  Up 
  Hill, 
  Watchett, 
  Kelmers- 
  

   den, 
  and 
  Beer 
  Crowcombe, 
  in 
  Somersetshire 
  ; 
  Garden 
  or 
  Westbury 
  

   Cliif, 
  Wainlode 
  Cliff, 
  Combe 
  Hill, 
  Aust 
  Passage, 
  Witworth, 
  and 
  near 
  

   Tewkesbury, 
  in 
  Gloucestershire 
  ; 
  Penarth 
  Cliff, 
  in 
  Glamorganshire 
  ; 
  

   Wilmcote 
  and 
  Harbury, 
  in 
  "Warwickshire 
  ; 
  and 
  in 
  Needwood 
  Forest, 
  

   in 
  North 
  Staffordshire. 
  As 
  a 
  general 
  rule, 
  however, 
  from 
  the 
  south 
  

   part 
  of 
  Leicestershire 
  to 
  Yorkshire 
  these 
  beds 
  have 
  not 
  yet 
  been 
  

   observed, 
  although 
  when 
  looked 
  for 
  they 
  may 
  perhaps 
  be 
  discovered. 
  

  

  Important 
  as 
  this 
  subformation 
  is 
  in 
  a 
  palaeontological 
  point 
  of 
  

   view, 
  it 
  nowhere 
  attains 
  a 
  thickness 
  of 
  more 
  than 
  from 
  20 
  to 
  50 
  

   feet 
  ; 
  and 
  it 
  is 
  therefore 
  the 
  more 
  remarkable 
  that 
  throughout 
  all 
  the 
  

  

  * 
  I 
  have 
  for 
  years 
  used 
  such 
  tables 
  in 
  my 
  public 
  lectures 
  ; 
  but 
  those 
  now 
  

   employed 
  for 
  my 
  old 
  tables 
  are 
  improved 
  ; 
  and 
  the 
  secondary 
  ones 
  are 
  entirely 
  

   reconstructed 
  from 
  tables, 
  many 
  yards 
  in 
  length, 
  by 
  Mr. 
  Etheridge, 
  in 
  which 
  he 
  

   shows 
  the 
  range 
  in 
  time 
  of 
  every 
  individual 
  secondary 
  species. 
  

  

  e2 
  

  

  