﻿K. 
  E. 
  TOMES 
  ON 
  LOWEE-OOLITE 
  MADEEPOEAEIA. 
  438 
  

  

  socialis 
  ; 
  and 
  consequently 
  they 
  do 
  not 
  decrease 
  in 
  size 
  so 
  rapidly 
  as 
  

   they 
  approach 
  the 
  centre 
  of 
  the 
  calice. 
  

  

  There 
  are 
  ten 
  primary 
  septa, 
  and 
  an 
  equal 
  number 
  of 
  secondary 
  

   ones, 
  which 
  are 
  two 
  thirds 
  the 
  length 
  of 
  the 
  primaries. 
  The 
  ter- 
  

   tiary 
  septa, 
  completing 
  the 
  septal 
  formula, 
  are 
  half 
  the 
  length 
  of 
  the 
  

   secondary 
  ones. 
  

  

  In 
  sections 
  of 
  the 
  corallites 
  an 
  elongated 
  columella 
  is 
  visible 
  ; 
  but 
  

   this 
  cannot 
  be 
  seen 
  in 
  the 
  unworn 
  calices. 
  

  

  I 
  have 
  not, 
  up 
  to 
  this 
  time, 
  met 
  with 
  any 
  other 
  representatives 
  of 
  

   the 
  genus 
  in 
  the 
  Inferior 
  Oolite 
  except 
  the 
  present 
  one, 
  and 
  I 
  have 
  

   only 
  obtained 
  it 
  from 
  Crickley 
  Hill. 
  

  

  Family 
  FUNGIBLE. 
  

  

  Genus 
  Thecoseeis, 
  de 
  Prom. 
  

  

  Thecoseeis 
  polymoepha, 
  Tomes, 
  Geol. 
  Mag. 
  Decade 
  ii. 
  vol. 
  v. 
  

   1878. 
  (PI. 
  XVIII. 
  figs. 
  12, 
  13.) 
  

  

  Since 
  the 
  description 
  of 
  this 
  species 
  appeared 
  several 
  other 
  ex- 
  

   amples 
  have 
  been 
  met 
  with, 
  some 
  of 
  which, 
  obviously 
  younger 
  

   individuals, 
  differ 
  from 
  those 
  described 
  in 
  being 
  attached. 
  Probably 
  

   with 
  greater 
  age 
  they 
  would 
  become 
  free. 
  

  

  On 
  this 
  genus* 
  I 
  made 
  some 
  observations, 
  comparing 
  it 
  with 
  

   Turbinoseris 
  and 
  Podoserisf, 
  which 
  now 
  require 
  modification. 
  The 
  

   latter 
  genus 
  was 
  formed 
  for 
  the 
  reception 
  of 
  two 
  species 
  from 
  the 
  

   Red 
  Chalk 
  of 
  Hunstanton. 
  After 
  the 
  description 
  of 
  the 
  genus, 
  Prof. 
  

   Duncan 
  states 
  that 
  " 
  the 
  genus 
  has 
  been 
  created 
  to 
  admit 
  Micra- 
  

   bacice 
  with 
  adherent 
  bases 
  and 
  more 
  or 
  less 
  of 
  a 
  peduncle." 
  Recent 
  

   researches, 
  however, 
  made 
  with 
  the 
  assistance 
  of 
  specimens 
  in 
  better 
  

   preservation, 
  have 
  brought 
  to 
  light 
  some 
  quite 
  unexpected 
  features 
  

   which 
  will 
  remove 
  these 
  Cretaceous 
  species 
  from 
  the 
  germs 
  created 
  

   for 
  them, 
  and 
  place 
  them 
  in 
  an 
  old 
  and 
  well-defined 
  one. 
  When 
  

   these 
  are 
  eliminated 
  the 
  genus 
  Podoseris 
  will 
  rest 
  solely 
  on 
  the 
  

   P. 
  constricta 
  of 
  the 
  Inferior 
  Oolite 
  of 
  Dorset, 
  which 
  differs 
  from 
  

   the 
  species 
  forming 
  the 
  type 
  of 
  the 
  genus, 
  in 
  having 
  a 
  restricted 
  

   instead 
  of 
  an 
  expanded 
  base, 
  and 
  in 
  being 
  destitute 
  of 
  epitheca. 
  

   This 
  approximates 
  it 
  more 
  nearly 
  to 
  Turbinoseris, 
  which 
  may 
  have 
  

   either 
  an 
  expanded 
  or 
  contracted 
  base, 
  and 
  may 
  have 
  an 
  epitheca 
  

   which 
  is 
  rudimentary, 
  but 
  which 
  is 
  frequently 
  distinct^. 
  How 
  

   nearly 
  the 
  genus 
  Turbinoseris, 
  as 
  amended 
  by 
  Prof. 
  Duncan, 
  may 
  

   resemble 
  Thecoseris 
  I 
  am 
  not 
  fully 
  prepared 
  to 
  say 
  ; 
  but 
  it 
  would 
  

   seem 
  that 
  the 
  latter 
  is 
  much 
  more 
  nearly 
  allied 
  to 
  the 
  more 
  

   recently 
  created 
  genus 
  Palceoseris§. 
  With 
  this 
  genus 
  it 
  will, 
  

   according 
  to 
  my 
  view, 
  be 
  found 
  to 
  be 
  identical. 
  

  

  The 
  present 
  species 
  has 
  been 
  met 
  with 
  in 
  the 
  lower 
  reef 
  at 
  Crick- 
  

   ley, 
  the 
  Horse 
  Pools 
  near 
  Gloucester, 
  and 
  near 
  Cooper's 
  Hill. 
  

  

  * 
  From, 
  et 
  Ferry, 
  Pal. 
  Franc. 
  Terr. 
  Jurass. 
  pi. 
  lviii. 
  fig. 
  2, 
  1869. 
  

   t 
  Duncan, 
  Supp. 
  Brit. 
  Foss. 
  Cor. 
  pi. 
  ii. 
  p. 
  25, 
  1869. 
  

   I 
  Duncan, 
  Quart. 
  Journ. 
  Geol. 
  Soc. 
  vol. 
  xxix. 
  p. 
  558. 
  

   § 
  Ibid. 
  vol. 
  xxvi. 
  p. 
  301. 
  

  

  