﻿72 
  PROCEEDINGS 
  OP 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [NOV. 
  18, 
  

  

  nevertheless 
  Mijnheer 
  Junghuhn's 
  title 
  of 
  " 
  Subapennine," 
  though 
  

   wonderfully 
  near, 
  considering 
  the 
  errors 
  in 
  his 
  determinations 
  of 
  the 
  

   fossils, 
  is 
  in 
  all 
  probability 
  somewhat 
  too 
  recent. 
  

  

  The 
  question 
  whether 
  Herr 
  von 
  Richthofen's 
  generalization 
  — 
  that 
  

   the 
  Eocene 
  formation 
  is 
  entirely 
  unrepresented 
  in 
  Java 
  — 
  and 
  M. 
  

   Hardie's 
  assertion 
  that 
  there 
  are 
  but 
  two 
  kinds 
  of 
  rock-formation 
  

   in 
  Java 
  — 
  a 
  volcanic 
  and 
  a 
  recent 
  Tertiary 
  — 
  be 
  well 
  founded 
  or 
  not 
  

   will 
  require 
  further 
  discussion, 
  and 
  the 
  cooperation 
  of 
  M. 
  de 
  Groot 
  

   and 
  his 
  coadjutors, 
  before 
  they 
  can 
  be 
  considered 
  as 
  more 
  than 
  

   conjectural. 
  

  

  Note 
  on 
  a 
  New 
  Coral 
  from 
  Mount 
  Sela 
  in 
  the 
  Island 
  of 
  Java. 
  

   By 
  P. 
  Martin 
  Duncan, 
  M.B., 
  E.G.S. 
  

  

  Astr^a 
  (Heliastr^a, 
  Edwards 
  <k 
  Haime) 
  Herklotsi, 
  spec. 
  nov. 
  

   PI. 
  VII. 
  figs. 
  9 
  a-9 
  d. 
  

  

  Corallum 
  large 
  and 
  compound 
  ; 
  base 
  smaller 
  than 
  the 
  calicular 
  

   surface, 
  which 
  is 
  slightly 
  convex 
  generally, 
  but 
  subplane 
  here 
  and 
  

   there. 
  Corallites 
  crowded 
  but 
  distinct, 
  slender, 
  tall, 
  very 
  variable 
  

   in 
  shape, 
  and 
  radiating 
  from 
  the 
  base 
  ; 
  circular 
  in 
  transverse 
  section 
  

   at 
  the 
  base, 
  but 
  becoming 
  polygonal, 
  oval, 
  or 
  elliptical 
  at 
  the 
  sur- 
  

   face. 
  Walls 
  thin, 
  imperforate, 
  and 
  delicate 
  throughout 
  ; 
  they 
  appear 
  

   to 
  unite 
  with 
  others 
  at 
  the 
  calicular 
  margin, 
  but 
  such 
  is 
  not 
  really 
  

   the 
  case, 
  as 
  costae 
  intervene. 
  Calices 
  often 
  deformed, 
  crowded, 
  vari- 
  

   able 
  in 
  outline, 
  and 
  hardly 
  projecting. 
  Costae 
  well 
  developed, 
  wedge- 
  

   shaped, 
  rather 
  prominent 
  (laterally), 
  straight, 
  and 
  equal 
  ; 
  they 
  equal 
  

   the 
  septa 
  in 
  number, 
  and 
  spaces 
  between 
  their 
  upper 
  margins, 
  at 
  the 
  

   surface, 
  are 
  very 
  distinct 
  and 
  characteristic. 
  Septa 
  variable 
  in 
  

   number 
  and 
  size, 
  barely 
  exsert 
  and 
  slightly 
  incised 
  above 
  ; 
  in 
  six 
  

   systems. 
  There 
  are 
  three 
  cycles 
  in 
  three 
  systems 
  generally, 
  and 
  

   two 
  in 
  the 
  rest 
  ; 
  but 
  a 
  rudimentary 
  septum 
  is 
  often 
  noticed 
  between 
  

   the 
  more 
  fully 
  developed 
  septa. 
  Primary 
  septa 
  the 
  largest, 
  either 
  

   four 
  of 
  them 
  being 
  very 
  marked 
  or 
  two 
  greatly 
  thickened 
  ; 
  they 
  are 
  

   often 
  curved 
  above, 
  and 
  are 
  generally 
  thicker 
  towards 
  the 
  columella 
  

   at 
  the 
  base, 
  and 
  they 
  carry 
  a 
  stout 
  paliform 
  tooth 
  at 
  their 
  inner 
  end. 
  

   Laminae 
  granular, 
  and 
  perforated 
  close 
  to 
  their 
  inner 
  margin 
  by 
  large 
  

   foramina. 
  Secondary 
  septa 
  smaller 
  than 
  the 
  primary, 
  but 
  larger 
  

   than 
  the 
  tertiary. 
  Both 
  the 
  secondary 
  and 
  tertiary 
  septa 
  are 
  in- 
  

   clined 
  to 
  curve 
  towards 
  each 
  other 
  and 
  to 
  the 
  primary 
  ; 
  their 
  laminae 
  

   are 
  very 
  areolar, 
  with 
  the 
  free 
  edges 
  serrated, 
  and 
  with 
  granules 
  on 
  

   the 
  lateral 
  surfaces 
  near 
  the 
  wall. 
  Columella 
  very 
  rudimentary, 
  and 
  

   formed 
  by 
  small 
  cylindrical 
  dissepiments, 
  which 
  are 
  attached 
  to 
  the 
  

   inner 
  margin 
  of 
  the 
  septa 
  by 
  stout 
  processes, 
  and 
  which 
  look 
  like 
  

   pali. 
  The 
  septal 
  fossa 
  is 
  tolerably 
  deep. 
  There 
  are 
  no 
  pali. 
  En- 
  

   dotheca 
  well 
  developed 
  ; 
  dissepiments 
  either 
  horizontal 
  or 
  inclined, 
  

   but 
  not 
  vesicular 
  ; 
  the 
  first 
  kind 
  extend 
  close 
  to 
  the 
  calicular 
  edge, 
  

   and, 
  by 
  being 
  on 
  the 
  same 
  plane, 
  nearly 
  close-in 
  the 
  corallite 
  — 
  like 
  

   tabulae, 
  whilst 
  the 
  latter 
  are 
  regular 
  and 
  well 
  marked 
  also. 
  Exotheca 
  

   well 
  developed; 
  dissepiments 
  stouter 
  than 
  those 
  of 
  the 
  endotheca, 
  

  

  