﻿552 
  DR. 
  W. 
  TEASER 
  HUME 
  ON 
  [Dec. 
  1 
  89 
  7, 
  

  

  junction 
  between 
  the 
  glauconitic 
  beds 
  (which 
  contain 
  in 
  places 
  

   pebbles 
  over 
  ^ 
  inch 
  in 
  diameter) 
  and 
  the 
  Yellow 
  Sandstone 
  is 
  

   of 
  a 
  peculiar 
  nature 
  : 
  the 
  glauconitic 
  rock 
  enclosing 
  many 
  fragments 
  

   of 
  the 
  lower 
  bed, 
  while 
  the 
  latter 
  in 
  its 
  upper 
  part 
  is 
  crowded 
  with 
  

   blocks 
  of 
  calcareous 
  glauconitic 
  sandstone. 
  

  

  The 
  Yellow 
  Sandstone 
  itself 
  is 
  of 
  the 
  usual 
  character, 
  and 
  a 
  

   Cucullcea 
  (C. 
  ligeriensis, 
  d'Orb., 
  according 
  to 
  Tate), 
  Vermicularice, 
  

   and 
  thin-shelled 
  pectens 
  are 
  the 
  principal 
  forms 
  noticed. 
  

  

  The 
  Glauconitic 
  Sands 
  were 
  not 
  observed 
  here. 
  

  

  Squires 
  Hill. 
  

  

  Several 
  large 
  quarries 
  have 
  been 
  opened 
  up 
  here, 
  in 
  the 
  second 
  

   of 
  which 
  (counting 
  from 
  the 
  side 
  nearest 
  Cave 
  Bill) 
  the 
  Chalk 
  is 
  

   some 
  50 
  feet 
  thick, 
  and 
  contains 
  regular 
  layers 
  of 
  flint. 
  Eossils 
  are 
  

   numerous 
  at 
  the 
  base, 
  including 
  abundant 
  Belemnitella 
  mucronata, 
  

   Schloth., 
  Echinocorys 
  scutatus, 
  Leske, 
  Terebratula 
  carnea, 
  Sow., 
  tooth 
  

   of 
  Lamna 
  sp., 
  Bourgueticrinus-stems, 
  plates 
  and 
  spines 
  of 
  Cidaris, 
  

   Inoceramus-imgments, 
  polyzoa, 
  Ventriculites 
  sp., 
  Coscinopora 
  sp., 
  

   Parasmilia 
  centralis, 
  Mant., 
  Kinyena 
  lima, 
  Sow., 
  and 
  Serpulce. 
  

  

  Beyond 
  this 
  large 
  quarry 
  is 
  a 
  small 
  one 
  behind 
  a 
  farmhouse, 
  in 
  

   which 
  the 
  lower 
  beds 
  of 
  the 
  series 
  are 
  well 
  exposed, 
  the 
  rocks 
  at 
  

   this 
  point 
  dipping 
  steeply 
  westward, 
  and 
  being 
  apparently 
  much 
  

   crushed 
  owing 
  to 
  the 
  movements 
  to 
  which 
  they 
  have 
  been 
  subjected. 
  

  

  At 
  the 
  base 
  of 
  the 
  quarry, 
  Glauconitic 
  Sands 
  of 
  the 
  usual 
  

   deep-green 
  colour 
  are 
  well 
  displayed, 
  containing 
  numerous 
  specimens 
  

   olExogyra 
  laevigata, 
  Sow., 
  and 
  Pecten 
  [Janira~\ 
  quinquecostatus, 
  Sow. 
  

   When 
  the 
  quarry 
  was 
  first 
  opened, 
  Mr. 
  E. 
  S. 
  Bell 
  obtained 
  a 
  number 
  

   of 
  fine 
  casts 
  of 
  Cucullcea 
  ligeriensis, 
  and 
  since 
  then 
  he 
  has 
  sent 
  me 
  

   another, 
  resembling 
  a 
  Ceromya, 
  from 
  the 
  same 
  locality. 
  Total 
  

   thickness 
  4 
  feet 
  6 
  inches 
  (this 
  was 
  determined 
  for 
  me 
  by 
  Mr. 
  Bell). 
  

   The 
  uppermost 
  layer 
  of 
  this 
  greensand 
  is 
  spotted 
  with 
  darker 
  

   patches, 
  and 
  is 
  characterized 
  by 
  Vermicularia 
  quinquecarinata, 
  

   Rom. 
  

  

  In 
  the 
  Yellow 
  Sandstone 
  (18 
  feet 
  thick), 
  the 
  only 
  fossils 
  

   observed 
  were 
  Vermicularice 
  and 
  a 
  broken 
  Pecten. 
  

  

  The 
  soft 
  greensand 
  which 
  succeeds 
  it, 
  8 
  feet 
  thick, 
  yielded 
  only 
  

   a 
  solitary 
  shark's 
  tooth, 
  but 
  the 
  harder 
  glauconitic 
  sandy 
  

   limestone 
  above 
  is 
  full 
  of 
  Belemnitella 
  \Actinocamax\ 
  quadrata 
  

   (Blainv.), 
  Echinocorys 
  scutatus, 
  Leske, 
  and 
  fragmentary 
  sponges. 
  

   One 
  of 
  the 
  most 
  remarkable 
  features 
  at 
  Squires 
  Hill 
  is 
  the 
  nodular 
  

   character 
  at 
  times 
  assumed 
  by 
  the 
  chalk 
  containing 
  B. 
  quadrata. 
  

   A 
  section 
  taken 
  across 
  the 
  nodules, 
  which 
  are 
  brown 
  to 
  black 
  

   externally, 
  shows 
  them 
  to 
  consist 
  of 
  a 
  glauconitic 
  chalk, 
  characteristic 
  

   of 
  many 
  of 
  the 
  Irish 
  mulatto-stones. 
  

  

  The 
  southernmost 
  quarry 
  is 
  remarkable 
  for 
  two 
  thin 
  vertical 
  

   dykes 
  which 
  traverse 
  the 
  whole 
  thickness 
  of 
  the 
  Chalk. 
  Mr. 
  W. 
  

   J. 
  Atkinson, 
  P.G.S., 
  has 
  called 
  my 
  attention 
  to 
  the 
  fact 
  that, 
  in 
  a 
  

   microscopic 
  section 
  showing 
  the 
  junction 
  of 
  the 
  basalt 
  and 
  the 
  Chalk, 
  

   though 
  the 
  latter 
  is 
  thoroughly 
  altered 
  to 
  a 
  finely 
  granular 
  compact 
  

  

  