﻿462 
  PROF. 
  J. 
  W. 
  JUDD 
  ON 
  THE 
  EOCENE 
  AND 
  OLIGOCENE 
  

  

  localities 
  prove 
  to 
  what 
  an 
  extent 
  it 
  was 
  at 
  one 
  time 
  carried. 
  Frag- 
  

   mentary 
  specimens 
  of 
  the 
  fossils 
  of 
  these 
  beds 
  may 
  still 
  be 
  found 
  in 
  

   the 
  old 
  workings 
  ; 
  but 
  the 
  late 
  Mr. 
  F. 
  Edwards, 
  in 
  bringing 
  together 
  

   his 
  fine 
  collection 
  of 
  the 
  Mollusca 
  from 
  the 
  British 
  Lower 
  Tertiaries, 
  

   found 
  it 
  necessary 
  to 
  emply 
  workmen 
  to 
  reopen 
  some 
  of 
  these 
  pits, 
  

   in 
  order 
  to 
  obtain 
  well-preserved 
  specimens. 
  There 
  were 
  also 
  at 
  

   that 
  time 
  two 
  brickyards 
  in 
  which 
  the 
  strata 
  in 
  question 
  were 
  ex- 
  

   posed, 
  those 
  namely 
  of 
  Whitley 
  Ridge 
  and 
  lloydon, 
  the 
  former 
  of 
  

   which 
  has 
  been 
  long 
  closed. 
  

  

  But 
  in 
  the 
  year 
  1858 
  the 
  construction 
  of 
  a 
  railway-cutting 
  at 
  

   Brockenhurst 
  afforded 
  an 
  opportunity 
  for 
  collecting 
  the 
  fossils 
  of 
  this 
  

   interesting 
  series 
  of 
  marine 
  beds, 
  of 
  which 
  opportunity 
  Mr. 
  Edwards 
  

   and 
  the 
  Geological 
  Survey 
  made 
  excellent 
  use 
  ; 
  Mr. 
  Henry 
  Keep- 
  

   ing 
  and 
  Mr. 
  Richard 
  Uibbs, 
  the 
  fossil-collector 
  of 
  the 
  Survey, 
  were 
  

   both 
  for 
  some 
  time 
  employed 
  in 
  collecting 
  the 
  fossils 
  from 
  this 
  inter- 
  

   esting 
  deposit. 
  

  

  In 
  1S(>;> 
  M. 
  von 
  Konen 
  visited 
  tins 
  country: 
  and 
  in 
  the 
  group 
  

   of 
  fossils 
  which 
  Mr. 
  Edwards 
  had 
  collected 
  from 
  Lyndhurst, 
  AVhit- 
  

   ley 
  Hidge, 
  Roydon, 
  and 
  Brockenhurst 
  he 
  at 
  once 
  recognized 
  the 
  

   peculiar 
  and 
  remarkable 
  fauna 
  of 
  the 
  Tongrian 
  of 
  Belgium 
  and 
  the 
  

   Lower 
  Oligocene 
  of 
  Northern 
  Germany. 
  He 
  also 
  placed 
  on 
  the 
  

   same 
  horizon 
  certain 
  beds 
  at 
  Colwcll 
  Bay 
  and 
  Whitecliff 
  Bay 
  in 
  the 
  

   Isle 
  of 
  Wight 
  • 
  

  

  Dr. 
  Duncan's 
  subsequent 
  study 
  of 
  the 
  rich 
  coral-fauna 
  of 
  these 
  

   beds 
  amply 
  confirmed 
  Von 
  Konen's 
  views 
  as 
  to 
  their 
  Lower- 
  

   Oligocene 
  age 
  f. 
  

  

  Now 
  in 
  my 
  former 
  memoir 
  I 
  have 
  argued 
  that 
  the 
  Barton 
  Clay 
  

   and 
  its 
  continental 
  equivalents 
  ought 
  to 
  be 
  regarded 
  as 
  forming 
  the 
  

   highest 
  member 
  of 
  the 
  Eocene. 
  The 
  Headon-Hill 
  Sands 
  and 
  Clays, 
  

   which 
  overlie 
  the 
  Barton 
  beds, 
  oxhibit 
  intercalated 
  bands 
  of 
  brackisb- 
  

   water 
  origin, 
  and 
  yield 
  a 
  considerable 
  fauna. 
  Among 
  the 
  most 
  

   abundant 
  and 
  characteristic 
  fossils 
  of 
  both 
  the 
  Headon 
  Sands 
  and 
  

   Clays 
  are 
  the 
  different 
  varieties 
  of 
  Cerithhim 
  concavum, 
  Sow. 
  In 
  

   many 
  parts 
  of 
  the 
  continent 
  a 
  series 
  of 
  beds 
  with 
  a 
  similar 
  fauna 
  

   has 
  been 
  found, 
  overlying 
  the 
  richly 
  fossiliferous 
  representative 
  of 
  

   the 
  Bartonian 
  ; 
  and 
  this 
  series 
  of 
  strata 
  has 
  long 
  been 
  recognized 
  by 
  

   Mayer, 
  Sandberger, 
  and 
  other 
  authors 
  as 
  " 
  the 
  zone 
  of 
  Cerithium 
  

   concavwm" 
  To 
  this 
  horizon, 
  therefore, 
  I 
  have 
  referred 
  both 
  the 
  

   Headon 
  Sands 
  and 
  Clays. 
  

  

  The 
  richly 
  fossiliferous 
  marine 
  beds 
  of 
  Lyndhurst 
  and 
  Brocken- 
  

   hurst 
  I 
  believe 
  to 
  altogether 
  overlie 
  the 
  Headon 
  group 
  or 
  Zone 
  of 
  

   Cerithium 
  concavum 
  \ 
  and 
  I 
  have 
  proposed 
  for 
  it 
  the 
  name 
  of 
  " 
  the 
  

   Brockenhurst 
  series," 
  inasmuch 
  as 
  it 
  constitutes 
  a 
  mass 
  of 
  strata 
  of 
  

   considerable 
  thickness 
  and 
  importance, 
  and 
  possesses 
  a 
  very 
  rich 
  and 
  

   characteristic 
  fauna. 
  I 
  have 
  grouped 
  the 
  Headon 
  and 
  Brockenhurst 
  

   beds 
  together 
  as 
  the 
  Lower 
  Oligocene, 
  and 
  the 
  overlying 
  Bembridge 
  

   and 
  Hempstead 
  as 
  the 
  Middle 
  Oligocene, 
  the 
  Upper 
  Oligocene 
  being 
  

   altogether 
  wanting 
  in 
  this 
  country. 
  

  

  * 
  Quart. 
  Journ. 
  Geol. 
  Soc. 
  vol. 
  xx. 
  (1864) 
  p. 
  98. 
  

  

  t 
  Monograph 
  of 
  British 
  Fossil 
  Corals, 
  2nd 
  ser., 
  Pal. 
  Soc. 
  1866. 
  

  

  