﻿Vol. 
  53.] 
  THE 
  CKETACEOUS 
  STKATA 
  OF 
  COUNTY 
  ANTEM. 
  5o3 
  

  

  limestone, 
  yet 
  many 
  specimens 
  of 
  foraminifera 
  situated 
  close 
  to 
  the 
  

   line 
  of 
  junction 
  appear 
  practically 
  unchanged. 
  

  

  Mr. 
  Bell 
  has 
  sent 
  me 
  a 
  number 
  of 
  specimens, 
  from 
  the 
  

   Chloritic 
  Chalk 
  and 
  base 
  of 
  the 
  White 
  Limestone 
  at 
  this 
  quarry, 
  

   which 
  show 
  that 
  the 
  nodular 
  rock 
  is 
  crowded 
  with 
  Belemnitella 
  

   [Actinocamax~\ 
  quadrata 
  and 
  Micraster 
  cor-anyuinum, 
  Forbes, 
  A. 
  

   Alfridi 
  being 
  also 
  present. 
  The 
  Chalk 
  immediately 
  above 
  this 
  bed 
  

   contains 
  Turritellaunicarinata, 
  Woodw., 
  fine 
  pectens, 
  Pleurotomarice, 
  

   and 
  a 
  gasteropod 
  of 
  doubtful 
  genus. 
  Nautili 
  and 
  Ammonites 
  appear 
  

   to 
  be 
  fairly 
  common, 
  but 
  the 
  latter 
  are 
  not 
  perfect 
  enough 
  to 
  admit 
  

   of 
  closer 
  identification. 
  

  

  Cave 
  Hill. 
  

  

  At 
  the 
  top 
  of 
  the 
  tramway-line 
  leading 
  to 
  the 
  large 
  quarry 
  cut 
  

   in 
  the 
  side 
  of 
  this 
  hill, 
  the 
  Glauconitic 
  Sands, 
  of 
  a 
  deep 
  green 
  

   colour, 
  overlie 
  strata 
  of 
  Liassic 
  age. 
  The 
  fossils 
  are 
  most 
  abundant 
  

   in 
  a 
  hard 
  rusty-brown 
  layer, 
  and 
  include 
  Exoyyra 
  laevigata, 
  Sow., 
  

   Pecten\Janira]quinqutcostatus, 
  Sow., 
  P.[Ghlamys\ 
  Datemplei, 
  d'Orb., 
  

   or 
  P. 
  Galliennd, 
  d'Orb., 
  Belemnites 
  ultimas, 
  d'Orb., 
  and 
  large 
  bivalves 
  

   in 
  the 
  form 
  of 
  casts, 
  which 
  have 
  some 
  external 
  resemblance 
  to 
  Thetis 
  

   Sowerbyi 
  ; 
  Vermicularia 
  quinquecarinata, 
  liom., 
  and 
  P. 
  [_AmussiuiUj 
  

   orbicularis 
  (Mant.), 
  also 
  occur, 
  but 
  very 
  rarely. 
  Above 
  the 
  fossiii- 
  

   ferous 
  layer, 
  the 
  rock 
  was 
  of 
  a 
  deep 
  brown 
  colour, 
  and 
  barren 
  of 
  

   fossils. 
  

  

  The 
  Yellow 
  Sandstone 
  is 
  very 
  nodular 
  at 
  this 
  point, 
  and 
  

   contains 
  large 
  chert-fragments 
  ; 
  in 
  its 
  upper 
  part 
  it 
  is 
  rilled 
  with 
  

   blocks 
  richer 
  in 
  glauconite, 
  and 
  is 
  overlain 
  by 
  a 
  true 
  glauconitic 
  

   sandstone. 
  

  

  The 
  Chloritic 
  Sandstone 
  has 
  yielded 
  numerous 
  fish-remains 
  

   (notably 
  Corax 
  falcatus, 
  Ag., 
  PtycJwdus 
  latissimus, 
  Ag., 
  Pt. 
  

   ■mammillaris, 
  Ag.) 
  and 
  Ostrea 
  semiplaua, 
  Sow.; 
  while 
  in 
  the 
  pink 
  

   glauconitic 
  chalk 
  above, 
  Spondylus 
  sfiinosas, 
  Sow., 
  is 
  most 
  

   noticeable. 
  

  

  The 
  White 
  Chalk 
  itself 
  is 
  very 
  rich 
  in 
  organisms, 
  especially 
  at 
  

   the 
  base. 
  These 
  include 
  Belemnitella 
  mucronata, 
  Schloth 
  ., 
  Echinocorys 
  

   ovatus, 
  Lam., 
  Ventriculites, 
  Bhynchonella 
  plicatilis, 
  Sow., 
  and 
  Hh. 
  

   limbata, 
  I)av. 
  In 
  addition 
  to 
  these 
  may 
  be 
  mentioned 
  Notidanus 
  

   microdon, 
  Ag., 
  Anomceodus 
  sp., 
  Hamites, 
  Nautilus 
  Largilliertianus, 
  

   d'Orb., 
  N. 
  Deslongchampsianus, 
  d'Orb., 
  Amm. 
  \_Pachy 
  discus] 
  Oldhami 
  

   (Sh.) 
  — 
  Pack. 
  Portlocki 
  (Sh.) 
  is 
  recorded 
  by 
  the 
  Geological 
  Survey, 
  — 
  

   fine 
  specimens 
  of 
  Lima 
  (which 
  apparently 
  belong 
  to 
  a 
  new 
  species), 
  

   Pecten 
  sp., 
  Pleurotomaria 
  jjerspectiva, 
  Mant., 
  Terebratidina 
  striata, 
  

   Wahl., 
  of 
  large 
  size, 
  and 
  differing 
  from 
  the 
  typical 
  T. 
  Defrancei, 
  

   Brongn., 
  in 
  being 
  more 
  depressed, 
  Galerites 
  conicus 
  (Breyn.), 
  a 
  

   Trochosmilian 
  coral, 
  and 
  Ooeloptychium 
  belfastiense, 
  Tate. 
  

  

  The 
  quarry 
  at 
  Whitewell 
  is 
  famous 
  as 
  being 
  the 
  locality 
  where 
  

   remains 
  of 
  Mosasaurus 
  gracilis, 
  Owen, 
  have 
  been 
  discovered, 
  and 
  

   these 
  have 
  been 
  mentioned 
  by 
  Mr. 
  Swanston 
  in 
  a 
  short 
  paper. 
  1 
  

  

  1 
  Proc. 
  Belfast 
  Nat. 
  Hist. 
  & 
  Phil. 
  Soc. 
  1856, 
  pp. 
  18-19. 
  

  

  