﻿1863.] 
  JENKINS 
  JAVAN 
  FOSSILS. 
  73 
  

  

  and 
  horizontal 
  ; 
  they 
  form 
  large 
  and 
  small 
  cells, 
  the 
  first 
  being 
  broad, 
  

   and 
  the 
  last 
  high. 
  Reproduction 
  by 
  extracalicular 
  gemmation 
  and 
  

   by 
  fissiparity. 
  Breadth 
  of 
  the 
  corallites 
  at 
  the 
  base 
  from 
  1 
  line 
  to 
  

   2 
  lines, 
  and 
  at 
  the 
  calicular 
  surface 
  from 
  ^ 
  to 
  \ 
  inch. 
  Height 
  of 
  the 
  

   corallites 
  3 
  inches, 
  and 
  depth 
  of 
  the 
  fossa 
  about 
  1^ 
  line. 
  There 
  

   are 
  three 
  dissepiments 
  to 
  a 
  line. 
  

  

  This 
  species 
  is 
  characterized 
  by 
  the 
  polygonal 
  and 
  irregular 
  shape 
  

   of 
  the 
  calices, 
  the 
  rudimentary 
  columella, 
  the 
  incomplete 
  third 
  cycle, 
  

   the 
  transverse 
  and 
  horizontal 
  epitheca 
  reaching 
  very 
  high 
  up, 
  the 
  

   presence 
  of 
  corallites 
  undergoing 
  fissiparous 
  growth, 
  and 
  the 
  inter- 
  

   costal 
  pits. 
  The 
  perforated 
  state 
  of 
  the 
  smaller 
  laminae 
  is 
  the 
  only 
  

   Cyphastraean 
  peculiarity 
  ; 
  and 
  the 
  species 
  is 
  closely 
  allied 
  to, 
  but 
  is 
  

   smaller 
  than, 
  Astrcea 
  (Heliastrcea) 
  quadrangularis, 
  Edwards 
  and 
  

   Haime, 
  the 
  habitat 
  of 
  which 
  is 
  unfortunately 
  unknown. 
  The 
  amount 
  

   of 
  endotheca 
  approximates 
  the 
  form 
  to 
  those 
  of 
  the 
  Miocene 
  ; 
  but 
  

   there 
  are 
  none 
  other 
  than 
  generic 
  resemblances 
  to 
  the 
  only 
  known 
  

   Eocene 
  Astraean. 
  

  

  The 
  perforated 
  laminae 
  of 
  Astrcea 
  Defranci 
  (Miocene) 
  resemble 
  

   those 
  of 
  this 
  species, 
  but 
  the 
  abundant 
  endothecal 
  tissue 
  of 
  the 
  

   latter 
  forms 
  a 
  specific 
  distinction. 
  — 
  [P. 
  M. 
  D.] 
  

  

  EXPLANATION 
  OF 
  PLATES 
  VI. 
  & 
  VII. 
  

  

  Illustrative 
  of 
  Tertiary 
  Shells 
  from 
  Java. 
  

   [The 
  figures 
  are 
  of 
  the 
  natural 
  size, 
  unless 
  it 
  is 
  otherwise 
  stated.] 
  

  

  Plate 
  VI. 
  

  

  Fig. 
  1. 
  Murex 
  Grooti: 
  a, 
  back 
  view; 
  b, 
  front 
  view. 
  

  

  2. 
  ? 
  paradoxicus: 
  a, 
  spinous 
  variety, 
  back 
  view; 
  b, 
  ordinary 
  form, 
  

  

  front 
  view. 
  

  

  3. 
  Pyrula 
  Javanis 
  : 
  a, 
  front 
  view 
  ; 
  b, 
  back 
  view. 
  

  

  4. 
  cochlidium 
  ; 
  front 
  view. 
  

  

  5. 
  Purpura 
  umbilicata 
  : 
  a, 
  front 
  view 
  ; 
  b, 
  back 
  view. 
  

  

  6. 
  Natica 
  Duncani 
  ; 
  front 
  view. 
  

  

  7. 
  Flemingiana 
  ? 
  ; 
  front 
  view. 
  

  

  8. 
  rostalina 
  ; 
  front 
  view. 
  

  

  Plate 
  VII. 
  

  

  Fig. 
  1. 
  Turritella 
  acuticingulata. 
  

   2. 
  simplex. 
  

  

  3. 
  Conus 
  striatellus 
  : 
  a, 
  front 
  view 
  ; 
  b, 
  portion 
  of 
  the 
  side, 
  magnified 
  4 
  

  

  diameters. 
  

  

  4. 
  Oliva 
  utriculus 
  (juv.?) 
  ; 
  front 
  view. 
  

  

  5. 
  Vicarya 
  (?) 
  callosa 
  ; 
  front 
  view. 
  

  

  6. 
  Turbo 
  obliquus 
  ; 
  front 
  view. 
  

  

  7. 
  Cardium 
  subalternatum 
  : 
  a, 
  lateral 
  view 
  of 
  right 
  valve 
  ; 
  b, 
  view 
  of 
  ante- 
  

  

  rior 
  extremity. 
  

  

  8. 
  Pythina 
  Semperi 
  : 
  a, 
  exterior 
  of 
  left 
  valve 
  ; 
  b, 
  exterior 
  of 
  right 
  valve 
  ; 
  

  

  both 
  magnified 
  3 
  diameters. 
  

  

  9. 
  Astrcea 
  Herklotsi 
  : 
  a, 
  calice, 
  magnified 
  4 
  diameters 
  ; 
  b, 
  transverse 
  sec- 
  

  

  tion 
  of 
  a 
  corallite, 
  magnified 
  3 
  diameters 
  ; 
  c, 
  longitudinal 
  section 
  of 
  

   a 
  corallite, 
  magnified 
  4 
  diameters, 
  showing 
  the 
  walls, 
  the 
  laminae, 
  the 
  

   endothecal 
  dissepiments 
  across 
  the 
  lamina?, 
  the 
  central 
  columellar 
  

   false 
  pali, 
  and 
  the 
  exotheca 
  ; 
  d, 
  diagram 
  of 
  the 
  superior 
  margin 
  of 
  

   a 
  septum 
  showing 
  the 
  paliform 
  tooth. 
  

  

  