﻿Vol. 
  53.] 
  THE 
  CRETACEOUS 
  STRATA 
  OF 
  COUNTY 
  ANTRIM. 
  561 
  

  

  above 
  it, 
  as 
  suggested 
  by 
  Tate. 
  By 
  combining 
  the 
  previous 
  two 
  

   sections 
  together 
  we 
  are 
  now 
  enabled 
  to 
  range 
  these 
  beds 
  by 
  means 
  

   of 
  their 
  fauna 
  as 
  follows 
  : 
  — 
  

  

  Zone. 
  Sub-zone. 
  

  

  Echinocorys 
  gibbus. 
  

   Serpula 
  filiformis. 
  

   Spondylus 
  spinosus 
  or 
  J 
  Ostrea 
  semiplana 
  = 
  main 
  Inoceramus- 
  

   Inoceramus 
  sp. 
  beds 
  

  

  Ehynchonella 
  plicatilis. 
  

  

  \ 
  Catopygus 
  columbarius. 
  

   Exogyra 
  columba. 
  

  

  Spondylus 
  spinosus 
  is 
  found 
  throughout 
  the 
  series, 
  except 
  in 
  d, 
  

   while 
  Terebratula 
  carnea 
  is 
  restricted 
  to 
  the 
  upper 
  part. 
  The 
  

   Yellow 
  Sandstone 
  here 
  attains 
  a 
  thickness 
  of 
  20 
  feet, 
  chert 
  being 
  

   developed 
  in 
  thick 
  bands, 
  at 
  regular 
  intervals 
  throughout 
  the 
  

   whole 
  rock; 
  but 
  the 
  organic 
  remains 
  appear 
  to 
  be 
  few, 
  a 
  possible 
  

   Ostrea 
  carinata 
  and 
  Ehynchonella 
  of 
  unrecognized 
  species 
  being 
  

   alone 
  noted 
  in 
  the 
  highest 
  chert-band. 
  At 
  the 
  base 
  some 
  4 
  feet 
  of 
  

   Glauconitic 
  Sands 
  are 
  exposed, 
  these 
  containing 
  small 
  Eocogyrce 
  

   and 
  a 
  Pecten 
  of 
  doubtful 
  species. 
  On 
  the 
  opposite 
  side 
  of 
  Larne 
  

   Lough, 
  at 
  Eedhall, 
  a 
  mile 
  north 
  of 
  Ballycarry, 
  the 
  officers 
  of 
  the 
  

   Geological 
  Survey 
  record 
  chloritic 
  sandstone, 
  and 
  judging 
  from 
  the 
  

   number 
  of 
  sponges 
  mentioned, 
  including 
  Aehilleum 
  fungiforme 
  and 
  

   species 
  of 
  Coscinopora, 
  Siphonia, 
  and 
  Ventriculites, 
  it 
  seems 
  highly 
  

   probable 
  that 
  at 
  least 
  the 
  base 
  of 
  the 
  Spongiarian 
  zone 
  is 
  

   represented. 
  Moreover, 
  the 
  presence 
  of 
  Terebratula 
  carnea 
  (com- 
  

   mon), 
  T. 
  semiglobosa, 
  Bhynchonella 
  plicatilis, 
  Exogyra 
  columba 
  

   (small), 
  Inoceramus-ir&gmenta, 
  Spondylus 
  spinosus 
  (common), 
  Echi- 
  

   nocorys 
  scutatus, 
  Micraster 
  cor-anguinum, 
  Lamna 
  acuminata, 
  and 
  

   Ptychodus 
  latissimus, 
  strengthens 
  the 
  view 
  that 
  the 
  main 
  body 
  of 
  

   the 
  Chloritic 
  Sand 
  is 
  here 
  represented. 
  It 
  should 
  be 
  noted 
  that 
  

   Galerites 
  subrotundus 
  is 
  also 
  recorded 
  from 
  this 
  locality. 
  

  

  Magheramorne. 
  

  

  At 
  this 
  village, 
  situated 
  on 
  the 
  western 
  coast 
  of 
  Larne 
  Lough, 
  oppo- 
  

   site 
  Barney's 
  Point, 
  is 
  the 
  large 
  Magheramorne 
  chalk-quarry. 
  The 
  

   limestone 
  has 
  been 
  analysed 
  by 
  members 
  of 
  the 
  Belfast 
  Naturalists' 
  

   Field 
  Club, 
  the 
  result 
  being 
  as 
  follows 
  : 
  — 
  

  

  Carbonate 
  of 
  lime 
  98'63% 
  

  

  Carbonate 
  of 
  magnesia 
  0"38°/ 
  

  

  Phosphate 
  of 
  lime 
  0'10°/ 
  

  

  Oxide 
  of 
  lime 
  and 
  alumina 
  O08°/o 
  

  

  Silica 
  and 
  insoluble 
  clay 
  O45°/ 
  

  

  99-64 
  

   For 
  the 
  present 
  writer's 
  analysis, 
  see 
  p. 
  578. 
  

  

  Glynn. 
  

  

  The 
  character 
  of 
  the 
  rocks 
  at 
  this 
  locality 
  has 
  been 
  noted 
  by 
  

   Dr. 
  C. 
  Barrois, 
  but 
  no 
  facts 
  of 
  importance 
  arise 
  from 
  their 
  study. 
  

   The 
  succession 
  and 
  thicknesses 
  are 
  : 
  — 
  

  

  Q. 
  J. 
  G. 
  S. 
  No. 
  212. 
  2 
  p 
  

  

  