﻿E. 
  E. 
  TOMES 
  ON 
  LOWEE-OOLITE 
  MADEEPOEAEIA. 
  441 
  

  

  the 
  Pisolite 
  at 
  Crickley 
  Hill, 
  very 
  nearly 
  at 
  the 
  bottom 
  of 
  the 
  exposed 
  

   section 
  ; 
  and 
  they 
  are 
  the 
  earliest 
  oolitic 
  corals 
  I 
  have 
  met 
  with, 
  

   with 
  the 
  exception 
  of 
  Montlivaltia 
  lens, 
  which 
  is 
  found 
  also 
  in 
  the 
  

   Cephalo_poda-\)Q&. 
  

  

  Oeoseeis 
  coxcexteica, 
  n. 
  sp. 
  

  

  The 
  corallum 
  has 
  a 
  more 
  or 
  less 
  turbinate 
  form, 
  and 
  was 
  attached 
  

   by 
  a 
  small 
  foot. 
  The 
  upper 
  surface 
  is 
  either 
  flat 
  or 
  more 
  com- 
  

   monly 
  a 
  little 
  concave 
  ; 
  and 
  the 
  outline 
  is 
  generally 
  of 
  a 
  rounded 
  

   quadrangular 
  form, 
  with 
  a 
  thin 
  and 
  rather 
  wavy 
  edge. 
  The 
  under 
  

   surface, 
  which 
  is 
  the 
  common 
  wall, 
  has 
  a 
  thin 
  and 
  generally 
  very 
  

   rudimentary 
  epitheca, 
  appearing 
  as 
  narrow 
  concentric 
  bands, 
  but 
  

   sometimes 
  covering 
  the 
  walls 
  in 
  patches. 
  The 
  mural 
  costse 
  are 
  

   numerous, 
  straight, 
  parallel, 
  and 
  delicate, 
  with 
  very 
  regular 
  but 
  not 
  

   crowded 
  cuneiform 
  synapticulae, 
  which 
  are 
  not 
  opposite 
  to 
  each 
  

   other 
  on 
  contiguous 
  costse. 
  

  

  In 
  the 
  centre 
  of 
  the 
  depressed 
  calicular 
  surface 
  the 
  calices 
  are 
  

   scattered 
  about 
  as 
  in 
  Thamnastrcea 
  ; 
  but 
  they 
  soon 
  assume 
  the 
  linear 
  

   arrangement 
  peculiar 
  to 
  the 
  genus, 
  the 
  furrows 
  following 
  in 
  a 
  consider- 
  

   able 
  degree 
  the 
  outline 
  of 
  the 
  corallum 
  ; 
  but 
  the 
  subangular 
  outline 
  

   of 
  the 
  upper 
  surface 
  permits 
  of 
  their 
  being 
  often 
  in 
  straight 
  lines 
  

   without 
  departing 
  from 
  their 
  concentric 
  disposition. 
  In 
  some 
  in- 
  

   stances 
  the 
  furrows 
  run 
  quite 
  out 
  at 
  the 
  edge 
  of 
  the 
  corallum. 
  The 
  

   furrows 
  are 
  about 
  two 
  and 
  a 
  half 
  lines 
  wide 
  ; 
  and 
  the 
  ridges 
  between 
  

   them 
  are 
  rather 
  prominent, 
  but 
  much 
  rounded. 
  

  

  The 
  septa 
  and 
  septal 
  costse 
  are 
  straight, 
  not 
  crowded, 
  very 
  

   uniform 
  in 
  thickness 
  throughout 
  and 
  with 
  each 
  other 
  ; 
  they 
  are 
  

   delicate, 
  aud 
  have 
  on 
  their 
  margins 
  very 
  regular 
  but 
  not 
  very 
  

   closely 
  placed 
  tubercles, 
  which 
  are 
  rather 
  longer 
  in 
  the 
  direction 
  

   of 
  the 
  length 
  of 
  the 
  costse. 
  

  

  The 
  calices 
  are 
  small 
  and 
  rather 
  deep, 
  with 
  a 
  tolerably 
  well- 
  

   defined 
  but 
  small 
  fossula. 
  They 
  are 
  about 
  two 
  lines 
  distant 
  from 
  

   each 
  other. 
  About 
  twelve 
  septa 
  appear 
  in 
  each 
  calice. 
  

  

  The 
  largest 
  example 
  I 
  have 
  yet 
  seen 
  has 
  a 
  calicular 
  surface 
  which 
  

   is 
  2-J- 
  inches 
  across, 
  and 
  has 
  a 
  height 
  of 
  1\ 
  inch. 
  

  

  It 
  has 
  been 
  found 
  in 
  the 
  lower 
  reef 
  at 
  Crickley 
  Hill 
  and 
  at 
  

   Cooper's 
  Hill, 
  and 
  is 
  not 
  rare. 
  

  

  Oeoseeis 
  coxtoeta, 
  n. 
  sp. 
  (PI. 
  XVIII. 
  fig. 
  17.) 
  

  

  The 
  corallum 
  is 
  attached 
  by 
  a 
  small 
  surface, 
  from 
  which 
  it 
  

   either 
  expands 
  laterally, 
  forming 
  an 
  elongated 
  and 
  curved 
  figure, 
  

   with 
  the 
  upper 
  or 
  calicular 
  surface 
  more 
  or 
  less 
  crescent-shaped, 
  or 
  

   it 
  becomes 
  a 
  very 
  ill-defined 
  turbinate 
  figure, 
  with 
  a 
  disposition 
  to 
  

   the 
  growth 
  of 
  bulbous 
  processes 
  from 
  its 
  outer 
  margin, 
  or 
  it 
  has 
  a 
  

   more 
  or 
  less 
  quadrangular 
  calicular 
  surface. 
  Generally, 
  however, 
  

   the 
  upper 
  surface 
  is 
  elongated, 
  with 
  or 
  without 
  a 
  crescentic 
  curve. 
  

  

  There 
  are 
  numerous 
  deep 
  wrinkles 
  in 
  the 
  epitheca, 
  which 
  is 
  con- 
  

   siderably 
  developed. 
  

  

  The 
  mural 
  costse 
  are 
  straight, 
  and 
  very 
  equal 
  in 
  size. 
  Compared 
  

   with 
  those 
  of 
  0. 
  concentrica, 
  thev 
  are 
  more 
  regular 
  and 
  a 
  little 
  

  

  Q.J.G.S. 
  No. 
  152. 
  2h 
  

  

  