﻿22 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [Nov. 
  18, 
  

  

  Locality. 
  

   #17. 
  Teleiophyllia 
  grandis, 
  gen. 
  et 
  spec. 
  Nivaje 
  shale, 
  San 
  Domingo, 
  

   nov. 
  

  

  18. 
  navicula, 
  gen. 
  et 
  spec. 
  nov. 
  . 
  Nivaje 
  shale, 
  San 
  Domingo. 
  

  

  19. 
  Ma2andrinasinuosissima,£tft0tfn?s 
  Silt 
  of 
  the 
  Sandstone 
  plain, 
  San 
  Do- 
  

  

  8f 
  Haime. 
  mingo. 
  

  

  20. 
  Astraea 
  Antillarum, 
  nobis, 
  var. 
  ... 
  Chert 
  ? 
  of 
  Antigua. 
  

  

  21. 
  brevis, 
  spec, 
  nov 
  Nivaje 
  shale, 
  San 
  Domingo. 
  

  

  22. 
  Plesiastraa 
  distans, 
  spec. 
  nov. 
  . 
  . 
  . 
  Silt 
  of 
  the 
  Sandstone 
  plain, 
  San 
  Do- 
  

  

  mingo. 
  

  

  23. 
  globosa, 
  spec, 
  nov 
  Silt 
  of 
  the 
  Sandstone 
  plain, 
  San 
  Do- 
  

  

  mingo. 
  

  

  24. 
  spongiformis, 
  spec. 
  nov. 
  ... 
  Silt 
  of 
  the 
  Sandstone 
  plain, 
  San 
  Do- 
  

  

  mingo. 
  

  

  25. 
  ramea, 
  spec. 
  nov. 
  et 
  var. 
  ... 
  Silt 
  of 
  the 
  Sandstone 
  plain, 
  San 
  Do- 
  

  

  mingo. 
  

   #26. 
  Solenastraea 
  Verhelsti, 
  Edwards 
  8f 
  Tufaceous 
  limestone, 
  San 
  Domingo. 
  

  

  Haime, 
  var. 
  [mingo. 
  

  

  27. 
  Siderastrtea 
  grandis, 
  nobis 
  Silt 
  of 
  the 
  Sandstone 
  plain, 
  San 
  Do- 
  

  

  Tabulate 
  Coral. 
  

  

  #28. 
  Poeillopora 
  crasso-ramosa, 
  spec. 
  Nivaje 
  shale, 
  San 
  Domingo, 
  

   nov. 
  

  

  III. 
  Description 
  of 
  the 
  Species. 
  

  

  1. 
  Ceratotrochus 
  duodecimcostatus, 
  Edwards 
  <fe 
  Haime. 
  

  

  A 
  very 
  fine 
  specimen 
  possessing 
  the 
  characteristics 
  of 
  this 
  -well- 
  

   known 
  form, 
  is 
  1| 
  inch 
  high, 
  and 
  y 
  9 
  ^ 
  inch 
  broad 
  at 
  the 
  calice. 
  

   " 
  From 
  the 
  yellow 
  shale 
  of 
  Angostina, 
  San 
  Domingo. 
  In 
  Europe, 
  

   from 
  the 
  Yienna 
  basin, 
  Turin, 
  &c. 
  Coll. 
  Geol. 
  Soc. 
  

  

  2. 
  Placocyathus 
  Barretti, 
  nobis. 
  

  

  Two 
  varieties 
  of 
  this 
  species 
  were 
  noticed 
  in 
  the 
  first 
  part 
  of 
  this 
  

   communication 
  as 
  coming 
  from 
  San 
  Domingo 
  ; 
  a 
  specimen 
  of 
  the 
  

   typical 
  form 
  is 
  amongst 
  the 
  collection 
  under 
  examination, 
  and 
  it 
  is 
  

   now 
  noticed 
  because 
  it 
  has 
  not 
  hitherto 
  been 
  recognized 
  in 
  San 
  Do- 
  

   mingo. 
  

  

  Erom 
  the 
  Postrero 
  shale, 
  San 
  Domingo, 
  and 
  the 
  Miocene 
  of 
  Ja- 
  

   maica. 
  Coll. 
  Geol. 
  Soc. 
  and 
  Brit. 
  Mus. 
  

  

  -3. 
  Placocyathus 
  variabilis, 
  spec. 
  nov. 
  Plate 
  II. 
  figs. 
  1 
  a-1 
  c. 
  ■ 
  

  

  Placocyathus 
  ? 
  species 
  1, 
  Lonsdale 
  MS. 
  

  

  Mr. 
  Lonsdale 
  has 
  described 
  two 
  species 
  of 
  Placocyathus 
  from 
  the 
  

   Heneken 
  Collection 
  ; 
  the 
  first 
  is 
  founded 
  on 
  five 
  specimens, 
  and 
  the 
  

   .second 
  on 
  one. 
  The 
  following 
  are 
  the 
  specific 
  characters 
  of 
  the 
  first. 
  

   **Corallum 
  flabelliform, 
  curved 
  below 
  and 
  sharply 
  pedicellated. 
  

   The 
  curve 
  is 
  in 
  the 
  plane 
  of 
  the 
  major 
  axis. 
  The 
  upper 
  half 
  of 
  one 
  

   side 
  has 
  a 
  deep 
  indentation, 
  but 
  the 
  opposite 
  surface 
  is 
  almost 
  uni- 
  

   formly 
  convex. 
  The 
  extremities 
  are 
  obtusely 
  rounded. 
  Calice, 
  an 
  

   elongated 
  oval, 
  modified 
  by 
  the 
  indentation, 
  principally 
  occupied 
  by 
  

   the 
  septa, 
  and 
  having 
  a 
  long 
  and 
  narrow 
  central 
  fossa, 
  not 
  deep, 
  

  

  ** 
  The 
  descriptions 
  prefixed 
  by 
  a 
  double 
  asterisk 
  are 
  abbreviations 
  of 
  those 
  in 
  

   Mr. 
  Lonsdale's 
  MS., 
  and 
  the 
  portions 
  between 
  inverted 
  commas 
  are 
  copied 
  from 
  

   that 
  memoir. 
  

  

  