﻿INFERIOR 
  OOLITE 
  OF 
  SHIPTON 
  GORGE, 
  DORSET. 
  565 
  

  

  pores 
  : 
  the 
  larger 
  are 
  few 
  in 
  number, 
  tubular 
  and 
  slightly 
  exsert 
  ; 
  

   the 
  smaller 
  are 
  exceedingly 
  fine, 
  and 
  cover 
  the 
  whole 
  surface. 
  

   Aperture 
  oval. 
  

  

  It 
  will 
  be 
  seen, 
  by 
  reference 
  to 
  the 
  figure, 
  that 
  the 
  zocecia 
  have 
  

   scarcely 
  any 
  of 
  the 
  claviform 
  character 
  of 
  Haime's 
  type. 
  The 
  pre- 
  

   servation 
  of 
  the 
  delicate 
  terminations 
  is 
  due 
  to 
  the 
  protection 
  given 
  

   by 
  a 
  colony 
  of 
  large 
  Proboscina?, 
  which 
  occupy 
  the 
  interior 
  of 
  the 
  

   same 
  Aviculoid 
  shell. 
  

  

  4. 
  Stomatopora 
  porrecta, 
  sp. 
  nov. 
  (PI. 
  XVIII. 
  figs. 
  7 
  a, 
  b, 
  8.) 
  

  

  Zocecial 
  length 
  1 
  to 
  1*6 
  millim., 
  width 
  0-23; 
  aperture 
  0*1. 
  

  

  Zoarium 
  dichotomously 
  branched, 
  with 
  uniserial, 
  very 
  lengthened, 
  

   and 
  sinuous 
  (Serpula-like) 
  zocecia. 
  Zocecia 
  rather 
  irregularly 
  cylin- 
  

   drical, 
  coarsely 
  wrinkled, 
  and 
  punctate. 
  The 
  exsert 
  part 
  of 
  the 
  cell 
  

   is 
  but 
  slightly 
  raised, 
  and 
  is 
  ordinarily 
  about 
  i 
  of 
  the 
  whole 
  in 
  

   length; 
  the 
  terminations, 
  however, 
  do 
  not 
  seem 
  to 
  be 
  perfect. 
  

   Aperture 
  oval. 
  Ovicell 
  (?). 
  If 
  the 
  shield-like 
  body 
  (PI. 
  XVIII. 
  

   fig. 
  8), 
  from 
  beneath 
  which 
  the 
  branches 
  emerge, 
  should 
  be 
  the 
  ovicell 
  

   of 
  the 
  species, 
  it 
  will 
  be 
  of 
  a 
  different 
  type 
  from 
  the 
  surface-inflations 
  

   of 
  the 
  zoarium 
  common 
  in 
  the 
  genus. 
  The 
  tubular 
  surface-pores 
  on 
  

   it 
  are 
  the 
  same 
  as 
  on 
  the 
  cylindrical 
  zocecia. 
  

  

  The 
  long 
  Serpula-like 
  zocecia 
  with 
  coarse 
  transverse 
  wrinkles 
  are 
  

   fairly 
  distinctive. 
  It 
  is 
  open 
  to 
  question 
  whether 
  the 
  fragment 
  of 
  

   a 
  Lias 
  fossil, 
  figured 
  on 
  plate 
  xxv. 
  fig. 
  10, 
  vol. 
  xliii. 
  Quart. 
  Journ. 
  

   Geol. 
  Soc, 
  is 
  referable 
  to 
  the 
  same 
  species, 
  as 
  I 
  at 
  one 
  time 
  sup- 
  

   posed 
  it 
  to 
  be 
  : 
  there 
  the 
  free 
  part 
  of 
  the 
  cell 
  is 
  much 
  longer. 
  The 
  

   " 
  Calcaire 
  a 
  Polypiers 
  " 
  at 
  Panville, 
  Calvados, 
  yields 
  a 
  similar 
  form 
  to 
  

  

  5. 
  jporrecta. 
  

  

  5. 
  Stomatopora, 
  sp. 
  

  

  Zoarial 
  length 
  0*4 
  to 
  0*5 
  millim., 
  width 
  0-3 
  ; 
  aperture 
  0*1. 
  

  

  Zoarium 
  adnate, 
  composed 
  of 
  a 
  linear 
  series 
  of 
  ten 
  inflated 
  and 
  

   conical 
  zocecia 
  without 
  dilatation 
  at 
  the 
  base. 
  Zocecia 
  transversely 
  

   wrinkled 
  and 
  coarsely 
  punctate. 
  Aperture 
  oval. 
  

  

  There 
  are 
  one 
  or 
  two 
  perforations 
  in 
  each 
  cell 
  about 
  0*3 
  millim. 
  

   in 
  diameter 
  at 
  irregular 
  distances 
  below 
  the 
  peristomes, 
  recalling 
  

   the 
  features 
  of 
  certain 
  Chilostomatous 
  cells. 
  The 
  example, 
  however, 
  

   is 
  a 
  solitary 
  one 
  and 
  ill-preserved. 
  Stomatopora 
  granulata, 
  M.-Edw., 
  

   is 
  nearly 
  related 
  to 
  it. 
  

  

  Proboscina. 
  

  

  Proboscina 
  (pars), 
  Audouin 
  in 
  Savigny, 
  Descr. 
  de 
  l'Egvpte, 
  p. 
  236 
  

   (1826). 
  

  

  Proboscina, 
  d'Orbigny, 
  Paleont. 
  Prang., 
  Terr. 
  Cret. 
  t. 
  v. 
  p. 
  884 
  

   (1854). 
  

  

  So 
  slight 
  are 
  the 
  distinctions 
  between 
  the 
  genera 
  Stomatopora 
  and 
  

   Proboscina 
  that 
  it 
  has 
  been 
  more 
  as 
  a 
  matter 
  of 
  convenience 
  in 
  this 
  

   individual 
  instance 
  that 
  I 
  have 
  placed 
  the 
  uniserial 
  forms 
  under 
  the 
  

   head 
  of 
  the 
  former, 
  than 
  from 
  any 
  sense 
  of 
  there 
  being 
  a 
  natural 
  line 
  

  

  