﻿376 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [May 
  11, 
  

  

  Above 
  the 
  gravel 
  lies 
  a 
  bed 
  which 
  for 
  some 
  distance 
  from 
  the 
  eastern 
  

   end 
  of 
  the 
  section 
  consists 
  of 
  a 
  reddish-yellow 
  sand, 
  nearly 
  pure, 
  but 
  

   containing 
  small 
  angular 
  flints, 
  and 
  here 
  and 
  there 
  a 
  pebble 
  of 
  chalk. 
  

   Towards 
  the 
  middle 
  it 
  passes 
  into 
  a 
  blue 
  sandy 
  clay, 
  and 
  near 
  the 
  

   bank 
  of 
  Kimmeridge 
  Clay 
  it 
  becomes 
  a 
  stiff 
  blue 
  clay 
  with 
  chalky 
  

   seams. 
  Some 
  signs 
  of 
  stratification 
  were 
  apparent 
  in 
  the 
  more 
  

   clayey 
  portion, 
  and 
  at 
  the 
  west 
  end 
  there 
  was 
  some 
  contortion 
  of 
  the 
  

   chalky 
  seams. 
  

  

  The 
  uppermost 
  bed 
  is 
  a 
  sandy 
  clay 
  with 
  angular 
  flints, 
  pebbles, 
  

   and 
  subangular 
  fragments, 
  similar 
  in 
  a 
  great 
  measure 
  to 
  those 
  in 
  the 
  

   gravel, 
  but 
  in 
  many 
  cases 
  not 
  so 
  easily 
  referred 
  to 
  the 
  Lower 
  Green- 
  

   sand. 
  This 
  bed 
  was 
  clearly 
  defined 
  after 
  rain, 
  standing 
  out 
  in 
  relief 
  

   over 
  the 
  sand 
  below, 
  but 
  I 
  could 
  not 
  trace 
  it 
  beyond 
  the 
  middle 
  of 
  

   the 
  section. 
  

  

  In 
  the 
  bottom 
  gravel 
  are 
  Anoclon, 
  TJnio 
  litoralis 
  (?), 
  Cyclas, 
  Pisi- 
  

   dium 
  (all 
  abundant), 
  and 
  Ancylus 
  fluviatilis. 
  The 
  bed 
  over 
  the 
  gravel 
  

   contains 
  these, 
  with 
  Limncea, 
  Helix, 
  and 
  Planorbis. 
  In 
  these 
  two 
  

   lower 
  beds 
  the 
  Mammalian 
  remains 
  occur. 
  The 
  uppermost 
  bed 
  

   appears 
  to 
  be 
  altogether 
  barren. 
  

  

  It 
  will 
  be 
  seen 
  that 
  this 
  section 
  exhibits 
  the 
  usual 
  characteristics 
  

   of 
  a 
  silted-up 
  river. 
  The 
  gravel 
  lies 
  on 
  the 
  inferior 
  formation 
  as 
  it 
  

   was 
  eroded 
  by 
  the 
  action 
  of 
  the 
  stream, 
  and 
  in 
  the 
  gravel 
  are 
  Shells 
  

   of 
  the 
  species 
  which 
  inhabited 
  the 
  river 
  when 
  it 
  flowed 
  at 
  that 
  level. 
  

   Above 
  lies 
  the 
  finer 
  " 
  inundation 
  mud 
  " 
  which 
  was 
  deposited 
  during 
  

   freshets 
  after 
  the 
  river 
  had 
  formed 
  a 
  lower 
  channel, 
  and 
  in 
  it 
  are 
  

   found 
  stagnant- 
  water 
  and 
  land 
  Shells, 
  together 
  with 
  those 
  proper 
  

   to 
  running 
  water. 
  

  

  The 
  Eailway 
  cuts 
  the 
  old 
  river-bank 
  nearly 
  at 
  right 
  angles 
  ; 
  and 
  

   the 
  course 
  of 
  the 
  stream 
  was 
  probably 
  from 
  south 
  to 
  north, 
  corre- 
  

   sponding 
  in 
  this 
  respect 
  with 
  the 
  present 
  drainage 
  of 
  the 
  country. 
  

  

  The 
  mean 
  level 
  of 
  the 
  gravel 
  exposed 
  in 
  the 
  section 
  is 
  about 
  

   5 
  feet 
  above 
  the 
  stream 
  at 
  (a), 
  and 
  23 
  feet 
  above 
  the 
  stream 
  to 
  the 
  

   westward 
  of 
  the 
  cutting, 
  flowing 
  from 
  Eycote 
  Pond. 
  

  

  The 
  Mammalian 
  remains 
  were 
  found 
  in 
  great 
  abundance. 
  They 
  

   were 
  very 
  soft 
  while 
  still 
  saturated 
  with 
  water, 
  so 
  that 
  the 
  greater 
  

   part 
  were 
  unavoidably 
  much 
  broken 
  in 
  the 
  work 
  of 
  excavation. 
  

   Many 
  of 
  those 
  saved 
  afterwards 
  disappeared, 
  being 
  either 
  destroyed 
  

   by 
  rough 
  handling, 
  or 
  carried 
  away 
  altogether. 
  The 
  bones 
  exa- 
  

   mined, 
  therefore, 
  form 
  but 
  a 
  small 
  proportion 
  of 
  those 
  found 
  in 
  the 
  

   cutting. 
  I 
  have, 
  however, 
  been 
  able 
  to 
  identify 
  portions 
  of 
  6 
  or 
  7 
  

   Elephants, 
  13 
  Horses, 
  1 
  Ehinoceros, 
  1 
  Ox, 
  5 
  Deer, 
  and 
  a 
  Carnivore. 
  

  

  That 
  these 
  are 
  the 
  least 
  number 
  of 
  individuals 
  represented 
  may 
  be 
  

   seen 
  by 
  referring 
  to 
  the 
  annexed 
  list 
  of 
  some 
  of 
  the 
  principal 
  bones, 
  

   &c, 
  which 
  have 
  been 
  identified. 
  

  

  