﻿34 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [NOV. 
  18, 
  

  

  phyllia) 
  Martinana 
  (Icon. 
  Zooph. 
  pi. 
  66. 
  fig. 
  46) 
  there 
  are 
  no 
  exo- 
  

   thecal 
  dissepiments. 
  They 
  exist 
  abundantly 
  in 
  the 
  San-Domingan 
  

   fossils, 
  and, 
  with 
  the 
  serrate 
  free 
  edge 
  of 
  the 
  septa, 
  constitute 
  marked 
  

   structural 
  distinctions 
  from 
  the 
  acknowledged 
  peculiarities 
  of 
  Rhipi- 
  

   dogyra. 
  If 
  the 
  septa 
  of 
  Rhipidogyra 
  are 
  ever 
  determined 
  (as 
  I 
  be- 
  

   lieve 
  they 
  will 
  be, 
  as 
  better 
  specimens 
  are 
  found) 
  not 
  to 
  be 
  Eusrnilian, 
  

   the 
  presence 
  of 
  exothecal 
  dissepiments 
  will 
  constitute 
  a 
  great 
  reason 
  

   for 
  not 
  uniting 
  the 
  San-Domingan 
  forms 
  with 
  that 
  genus. 
  The 
  

   Corals 
  formerly 
  called 
  Rhipidogyra 
  plicata 
  and 
  Rhipidogyra 
  Danaice, 
  

   Edwards 
  and 
  Haime, 
  have 
  large 
  endothecal 
  cells, 
  but 
  not 
  a 
  vestige 
  of 
  

   exotheca, 
  and 
  they 
  are 
  now 
  classified 
  with 
  the 
  genus 
  Eusmilia. 
  

  

  These 
  remarks 
  have 
  been 
  considered 
  necessary 
  on 
  account 
  of 
  the 
  

   many 
  points 
  in 
  which 
  the 
  fossils 
  under 
  consideration 
  agree 
  with 
  the 
  

   genus 
  Rhipidogyra. 
  

  

  Teleiophyllia, 
  gen. 
  nov. 
  

  

  Corallum 
  long, 
  low, 
  narrow, 
  and 
  pedicellate. 
  Calices 
  confluent, 
  

   forming 
  a 
  nearly 
  straight 
  series. 
  Septa 
  numerous, 
  close, 
  granular, 
  

   serrate. 
  Costae 
  free 
  and 
  granular. 
  Columella 
  lamellar 
  and 
  long. 
  

   An 
  endotheca, 
  an 
  exotheca, 
  and 
  an 
  epitheca, 
  all 
  well 
  developed. 
  

  

  It 
  occupies 
  the 
  place 
  amongst 
  the 
  Astrceides 
  filled 
  by 
  Rhipidogyra 
  

   amongst 
  the 
  Eusmilince, 
  and 
  merits 
  an 
  acknowledgment 
  of 
  its 
  struc- 
  

   tural 
  perfection 
  in 
  its 
  generic 
  appellation. 
  

  

  17. 
  Teleiophyllia 
  graxdis, 
  spec. 
  nov. 
  PI. 
  III. 
  figs. 
  5 
  a, 
  5 
  b. 
  

   Rhipidogyra 
  ?, 
  Lonsdale 
  MS. 
  

  

  **Corallum 
  : 
  " 
  the 
  specimen 
  is 
  greatly 
  expanded 
  in 
  the 
  range 
  of 
  the 
  

   major 
  axis, 
  but 
  the 
  height 
  and 
  breadth 
  are 
  small. 
  It 
  sprang 
  from 
  

   a 
  minute 
  inverted 
  cone 
  {-^ 
  inch 
  high), 
  and 
  terminated 
  inferiorly 
  in 
  

   a 
  little 
  pedicel 
  which 
  could 
  have 
  afforded 
  support 
  only 
  to 
  the 
  cone. 
  

   From 
  this 
  commencement 
  the 
  Coral 
  extends 
  almost 
  horizontally 
  in 
  

   opposite 
  directions, 
  and, 
  as 
  just 
  stated, 
  very 
  considerably, 
  while 
  

   the 
  increase 
  in 
  breadth 
  is 
  relatively 
  trifling. 
  The 
  under 
  surface 
  is 
  

   rounded, 
  yet 
  elliptically 
  rugose, 
  and 
  slightly 
  narrowed 
  towards 
  the 
  

   extremities. 
  The 
  sides 
  are 
  almost 
  vertical 
  ; 
  the 
  preserved 
  extremity 
  

   is 
  also 
  vertical 
  and 
  rounded. 
  The 
  margin 
  of 
  the 
  calice 
  is 
  straight. 
  

   The 
  normal 
  outline 
  may 
  be 
  said 
  to 
  have 
  been 
  straight." 
  Calice 
  nearly 
  

   straight, 
  the 
  slight 
  flexure 
  being 
  probably 
  accidental 
  ; 
  it 
  is 
  nearly 
  

   flat 
  or 
  slightly 
  convex. 
  It 
  is 
  fully 
  occupied 
  by 
  septa, 
  the 
  principal 
  

   ranging 
  from 
  the 
  wall 
  to 
  the 
  columella, 
  and 
  the 
  interspaces 
  being 
  

   small. 
  The 
  traces 
  of 
  a 
  fossula 
  are 
  too 
  slight 
  to 
  admit 
  of 
  the 
  struc- 
  

   ture 
  being 
  positively 
  stated 
  to 
  exist 
  ; 
  but 
  the 
  range 
  of 
  the 
  columella 
  

   is 
  very 
  distinct 
  as 
  a 
  small 
  ragged 
  ridge. 
  The 
  septa 
  are 
  in 
  series, 
  and 
  

   the 
  calices 
  are 
  not 
  distinguishable. 
  

  

  Between 
  every 
  pair 
  of 
  thick 
  septa 
  occurs 
  a 
  thinner 
  one, 
  with 
  

   occasionally 
  a 
  rudimentary 
  point 
  indicating 
  the 
  commencement 
  of 
  

   another 
  cycle. 
  " 
  The 
  upper 
  margin 
  is 
  arched 
  from 
  the 
  exterior 
  to 
  

   the 
  columella, 
  but 
  the 
  curvature 
  is 
  not 
  uniform, 
  being 
  greatest 
  exter- 
  

   nally 
  ; 
  it 
  is 
  also 
  sharp, 
  whether 
  the 
  plate 
  be 
  thick 
  or 
  thin, 
  and 
  sur- 
  

  

  