﻿Yol. 
  53.] 
  ASSOCIATED 
  BEDS, 
  IX 
  X. 
  DEVON 
  AND 
  W. 
  SOMERSET. 
  461 
  

  

  of 
  them. 
  From 
  the 
  fact 
  that 
  so 
  many 
  fossils 
  had 
  been 
  obtained 
  at 
  

   Treborongh 
  in 
  a 
  comparatively 
  short 
  time, 
  the 
  speaker 
  thought 
  that 
  

   the 
  fauna 
  might 
  be 
  largely 
  extended 
  by 
  anyone 
  who 
  had 
  time 
  to 
  

   work 
  the 
  quarries 
  systematically. 
  

  

  Dr. 
  J. 
  W. 
  Gregory 
  said 
  that 
  he 
  would 
  refer 
  only 
  to 
  the 
  palaeonto- 
  

   logical 
  questions, 
  and 
  not 
  to 
  the 
  stratigraphical 
  difficulties. 
  The 
  

   case 
  for 
  the 
  Lower 
  Devonian 
  age 
  of 
  the 
  fauna 
  appeared, 
  from 
  the 
  

   evidence 
  quoted 
  by 
  the 
  Author, 
  to 
  rest 
  on 
  the 
  Cvyphams 
  (as 
  the 
  

   Author 
  preferred 
  to 
  call 
  it) 
  laciniatus. 
  Dr. 
  Hicks 
  described 
  this 
  

   species 
  as 
  characteristically 
  Lower 
  Devonian 
  ; 
  but 
  it 
  is 
  commonest 
  

   at 
  the 
  extreme 
  top 
  of 
  the 
  Lower 
  Devonian, 
  as 
  in 
  the 
  Yichtian 
  Beds, 
  

   where 
  it 
  is 
  associated 
  with 
  Middle 
  Devonian 
  forms. 
  Gosselet 
  quotes 
  

   it 
  from 
  the 
  Eifelian 
  (Middle 
  Devonian), 
  and 
  asserts 
  its 
  occurrence 
  in 
  

   the 
  Upper 
  Devonian. 
  Hence 
  the 
  speaker 
  doubted 
  whether 
  it 
  proved 
  

   much. 
  He 
  asked 
  in 
  what 
  sense 
  the 
  Author 
  used 
  the 
  names 
  Balmanites 
  

   and 
  Crypliceus, 
  as 
  they 
  were 
  regarded, 
  at 
  least 
  by 
  some 
  American 
  

   authors, 
  as 
  synonymous 
  — 
  Cryphceus, 
  the 
  name 
  given 
  by 
  Green 
  in 
  

   1837, 
  having 
  been 
  abandoned 
  owing 
  to 
  its 
  prior 
  use 
  for 
  a 
  genus 
  of 
  

   beetles. 
  He 
  doubted 
  whether 
  the 
  absence 
  from 
  Oakhampton 
  and 
  

   Treborough 
  of 
  species 
  found 
  in 
  the 
  beds 
  to 
  the 
  north 
  and 
  south 
  was 
  

   of 
  the 
  value 
  that 
  the 
  Author 
  assigned 
  to 
  it. 
  The 
  great 
  difficulty 
  in 
  

   Devonian 
  correlation 
  always 
  had 
  been 
  the 
  appearance 
  of 
  groups 
  of 
  

   species 
  most 
  characteristic 
  of 
  one 
  horizon 
  at 
  a 
  considerably 
  lower 
  

   level. 
  For 
  example, 
  the 
  Brilon 
  Ironstone 
  has 
  been 
  shown 
  by 
  Kayser 
  

   to 
  belong 
  to 
  the 
  Middle 
  Devonian 
  with 
  an 
  Upper 
  Devonian 
  colony. 
  

   Hence 
  the 
  speaker 
  doubted 
  whether 
  a 
  list 
  of 
  genera 
  such 
  as 
  the 
  

   Author 
  had 
  read 
  was 
  sufficient 
  to 
  prove 
  whether 
  the 
  Oakhampton 
  

   beds 
  were 
  Lower 
  or 
  Middle 
  Devonian. 
  He 
  was 
  surprised 
  to 
  hear 
  

   the 
  species 
  punctatus 
  spoken 
  of 
  as 
  only 
  a 
  variety 
  of 
  ' 
  Cryphams 
  ' 
  

   laciniatus. 
  He 
  was 
  also 
  surprised 
  to 
  hear 
  the 
  name 
  Petraia 
  

   introduced 
  into 
  serious 
  work 
  : 
  Petraia 
  was 
  a 
  palaeontological 
  dustbin, 
  

   into 
  which 
  indeterminable 
  casts 
  of 
  all 
  sorts 
  of 
  simple 
  Palaeozoic 
  

   corals 
  were 
  thrown. 
  

  

  The 
  Author 
  said 
  that 
  as 
  no 
  facts 
  had 
  been 
  given 
  in 
  the 
  discussion 
  

   which 
  could 
  in 
  any 
  way 
  affect 
  his 
  conclusions, 
  a 
  reply 
  was 
  hardly 
  

   necessary. 
  He 
  would, 
  however, 
  state 
  that 
  it 
  seemed 
  to 
  him 
  strange 
  

   that 
  those 
  who 
  were 
  opposed 
  to 
  his 
  amended 
  reading 
  of 
  the 
  suc- 
  

   cession 
  in 
  North 
  Devon 
  and 
  West 
  Somerset 
  had 
  not 
  visited 
  those 
  

   areas 
  in 
  the 
  interval 
  which 
  had 
  taken 
  place 
  between 
  the 
  reading 
  of 
  

   the 
  two 
  parts 
  of 
  his 
  paper. 
  They 
  had 
  been 
  made 
  aware 
  of 
  the 
  fact 
  

   that 
  the 
  Morte 
  Slates, 
  previously 
  considered 
  unfossiliferous, 
  con- 
  

   tained 
  several 
  faunas 
  ; 
  and 
  if 
  they 
  believed 
  that 
  faunas 
  were 
  of 
  any 
  

   value 
  in 
  defining 
  the 
  age 
  of 
  the 
  beds, 
  they 
  ought 
  to 
  have 
  produced 
  

   palaeontological 
  evidence 
  to 
  refute 
  his 
  arguments. 
  It 
  was 
  entirely 
  

   erroneous 
  to 
  state 
  that 
  any 
  evidence 
  had 
  been 
  given 
  which 
  tended 
  

   in 
  the 
  least 
  degree 
  to 
  minimize 
  his 
  statements 
  in 
  regard 
  to 
  the 
  

   Silurian 
  facies 
  of 
  the 
  North 
  Devon 
  fossils 
  or 
  of 
  the 
  individual 
  

   fossils 
  which 
  he 
  had 
  described. 
  It 
  was 
  quite 
  useless 
  here, 
  as 
  in 
  

  

  