﻿1863.] 
  DUNCAN 
  WEST 
  INDIAN 
  C0BALS. 
  43 
  

  

  cyathus 
  cornucopia 
  * 
  ; 
  T. 
  laterospinosus 
  ; 
  Siderastraea 
  crenulata 
  ; 
  

   Pontes 
  Collegniana 
  ; 
  Ceratotrochus 
  duodecimcostatus 
  ; 
  Stylo- 
  

   phora 
  raristella. 
  

  

  5. 
  Antillia 
  ponderosaf 
  ; 
  Astraea 
  endothecata 
  f. 
  

  

  6. 
  Solenastraea 
  Yerhelsti. 
  

  

  7. 
  Phylloccenia 
  sciilpta 
  ; 
  Astrocoenia 
  decaphylla. 
  

  

  8. 
  a. 
  Maeandrina 
  filograna 
  ; 
  Caryophyllia 
  affinis. 
  

  

  6. 
  Astraea 
  Barbadensis 
  ; 
  A. 
  Pleiades 
  ; 
  Rhodaraea 
  irregularis 
  ; 
  

   Alveopora 
  microscopica 
  ; 
  A. 
  megalaxona 
  ; 
  Coeloria 
  dens-ele- 
  

   phantis 
  ; 
  Astroria 
  polygonalis 
  ; 
  A. 
  affinis 
  ; 
  A. 
  Antiguensis 
  ; 
  

   Placoeyathus 
  Barretti 
  ; 
  P. 
  variabilis 
  ; 
  P. 
  costatus 
  ; 
  Placotrochus 
  

   Lonsdalei 
  ; 
  P. 
  alveolus 
  ; 
  Flabellum 
  dubium 
  ; 
  Dichoccenia 
  tu- 
  

   berosa 
  t 
  ; 
  Stylophora 
  affinis 
  f 
  ; 
  Pocillopora 
  crassoramosa. 
  

  

  c. 
  Plesiastraea 
  distans 
  f 
  ; 
  P. 
  globosa 
  ; 
  P. 
  spongiformis 
  ; 
  P. 
  ramea 
  ; 
  

   Cyphastraea 
  costata. 
  

  

  d. 
  Astraea 
  crassolamellata 
  I 
  ; 
  A. 
  Antiguensis 
  f 
  ; 
  A. 
  costata 
  ; 
  A. 
  

   cellulosa 
  ; 
  Siderastraea 
  grandis 
  ; 
  Cyathina 
  Guadalupensis. 
  

  

  e. 
  Antillia 
  dentatat; 
  A. 
  Lonsdaleia 
  t; 
  A. 
  bilobataf; 
  Astraea 
  An- 
  

   tillarum 
  ft; 
  A. 
  cylindrica 
  f 
  ±. 
  

  

  /. 
  Stephanocoenia 
  tenuis 
  ; 
  Brachycyathus 
  Henekeni 
  ; 
  Barysmilia 
  

  

  intermedia 
  ; 
  Phyllocoenia 
  limbata 
  ; 
  Parasmilia 
  nutans. 
  

   g. 
  Isastraea 
  turbinata 
  ; 
  I. 
  conferta. 
  

   h. 
  Astraea 
  tenuis 
  ; 
  A. 
  brevis 
  ; 
  Thysanus 
  corbicula 
  ; 
  T. 
  excentri- 
  

  

  cus 
  ; 
  Stephanocoenia 
  dendroidea 
  ; 
  Paterocyathus 
  Guadalupensis 
  ; 
  

  

  Trochosmilia 
  Laurenti 
  ; 
  T. 
  gracilis 
  ; 
  Trochocyathus 
  abnormalis 
  ; 
  

  

  T. 
  profundus 
  ; 
  Teleiophyllia 
  grandis 
  ; 
  T. 
  navicula. 
  

  

  Summary. 
  

  

  

  Species 
  already 
  described 
  

  

  .. 
  28 
  

  

  New 
  varieties 
  of 
  known 
  species 
  

  

  .. 
  7 
  

  

  New 
  species 
  

  

  .. 
  48 
  

  

  New 
  varieties 
  of 
  new 
  species 
  

  

  .. 
  20 
  

  

  Doubtful 
  

  

  .. 
  3 
  

  

  106 
  

  

  EXPLANATION 
  OF 
  PLATES 
  II.-V. 
  

  

  Illustrative 
  of 
  the 
  Fossil 
  Corals 
  of 
  the 
  West 
  Indian 
  Islands. 
  

   Plate 
  II. 
  

  

  Fig. 
  1. 
  Placocyathus 
  variabilis: 
  a, 
  eorallum; 
  b, 
  part 
  of 
  a 
  calice, 
  both 
  natural 
  

  

  size 
  ; 
  c, 
  costre 
  and 
  epitheca, 
  magnified 
  4 
  diameters 
  ; 
  d, 
  lateral 
  view 
  

  

  of 
  the 
  pedicel, 
  natural 
  size. 
  

   2. 
  , 
  rar. 
  1 
  : 
  a, 
  eorallum 
  ; 
  b, 
  columella 
  seen 
  from 
  above, 
  both 
  

  

  natural 
  size 
  ; 
  c, 
  lateral 
  view 
  of 
  columella, 
  magnified 
  2 
  diameters. 
  

   3. 
  costatus 
  : 
  a, 
  front 
  view 
  of 
  eorallum, 
  natural 
  size 
  ; 
  b, 
  costae 
  and 
  

  

  epitheca, 
  magnified 
  4 
  diameters. 
  

  

  * 
  Doubtful 
  : 
  very 
  probably 
  it 
  is 
  a 
  variety 
  of 
  Trochocyathus 
  abnormalis, 
  nob. 
  

   t 
  There 
  is 
  a 
  remote 
  affinity 
  with 
  the 
  present 
  West 
  Indian 
  Coral-fauna, 
  but 
  

   not 
  so 
  close 
  as 
  with 
  that 
  under 
  the 
  head 
  of 
  which 
  the 
  species 
  are 
  ranged. 
  

   X 
  These 
  last 
  Astra?ans 
  have 
  European 
  Miocene 
  affinities 
  also. 
  

  

  