﻿564 
  MB. 
  E. 
  A. 
  WALFOBD 
  ON 
  SOME 
  BBYOZOA 
  FROM 
  THE 
  

  

  out 
  zocecia 
  (length 
  0*5 
  millim., 
  width 
  0-4), 
  with 
  greater 
  dilatation 
  at 
  

   the 
  base. 
  Haime 
  describes 
  the 
  species 
  as 
  varying 
  in 
  different 
  

   localities 
  from 
  | 
  to 
  | 
  millim. 
  in 
  the 
  width 
  of 
  the 
  zocecia, 
  and 
  the 
  

   length 
  of 
  the 
  zocecia 
  he 
  cites 
  as 
  generally 
  three 
  or 
  four 
  times 
  the 
  

   diameter 
  of 
  the 
  peristome. 
  The 
  Dorsetshire 
  forms 
  from 
  the 
  Inferior 
  

   Oolite 
  are 
  slightly 
  longer 
  than 
  Haiine's 
  from 
  the 
  Great 
  Oolite. 
  

   Occasionally 
  one 
  or 
  more 
  cells 
  will 
  become 
  dilated 
  and 
  inflated 
  at 
  

   the 
  proximal 
  end, 
  presenting 
  quite 
  a 
  different 
  zocecial 
  type. 
  The 
  

   Ranville 
  specimens 
  from 
  the 
  Forest 
  Marble 
  are 
  of 
  Reuss's 
  type 
  ; 
  and 
  

   the 
  figures 
  in 
  ' 
  Petrefacta 
  Germanise,' 
  pi. 
  Ixt., 
  indicate 
  two 
  kinds 
  of 
  

   cells. 
  Smitt* 
  places 
  St. 
  dicJwtoma, 
  M.-Edw. 
  (?), 
  under 
  his 
  /3, 
  forma 
  

   serpens 
  of 
  Tubidipora 
  incrassata, 
  d'Orb. 
  

  

  2. 
  Stomatopoba 
  spieata, 
  sp. 
  nov. 
  (PI. 
  XYIII. 
  figs. 
  6 
  a, 
  b.) 
  

  

  Zocecial 
  length 
  0'2 
  to 
  0-3 
  millim., 
  width 
  0-2 
  to 
  0'26; 
  aperture 
  0-06. 
  

  

  Zoarium 
  adnate, 
  with 
  uniserial 
  zocecia 
  disposed 
  in 
  a 
  semicircular 
  

   or 
  spiral 
  series 
  of 
  from 
  ten 
  to 
  twenty 
  without 
  bifurcation. 
  Zocecia 
  

   short, 
  only 
  one 
  third 
  longer 
  than 
  wide, 
  cylindrical, 
  slightly 
  decreas- 
  

   ing 
  in 
  size 
  from 
  base 
  to 
  mouth, 
  free 
  for 
  about 
  one 
  third 
  of 
  their 
  

   length. 
  Basal 
  part 
  of 
  zocecia 
  elevated, 
  and 
  without 
  widened 
  mar- 
  

   gins. 
  The 
  exsert 
  part 
  narrows 
  but 
  very 
  little 
  towards 
  the 
  aperture. 
  

   Aperture 
  oval. 
  Surface 
  punctulate. 
  Ovicells 
  (?). 
  

  

  The 
  species 
  is 
  well 
  distinguished 
  by 
  the 
  short 
  cylindrical 
  zocecia 
  

   with 
  slightly 
  elevated 
  bases 
  and 
  regular 
  arrangement. 
  Rare. 
  

  

  3. 
  Stomatopoba 
  dichotomoides, 
  d'Orb. 
  

  

  Stomatopora 
  dichotomoides, 
  d'Orbigny, 
  Pale'ont. 
  Frang., 
  Terr. 
  Cret. 
  

   t. 
  v. 
  p. 
  834 
  (1850-52); 
  Haime, 
  Descr. 
  des 
  Bryozoaires 
  Foss. 
  de 
  la 
  

   Form. 
  Jurass. 
  p. 
  163, 
  pi. 
  6. 
  fig. 
  2, 
  Mem. 
  Soc. 
  Geol. 
  de 
  France, 
  

   1854 
  ; 
  Brauns, 
  Die 
  Bryozoen 
  der 
  mittl. 
  Jura 
  der 
  Gegend 
  v. 
  Metz, 
  

   p. 
  322 
  (1879); 
  Reuss, 
  Bryozoen, 
  Anthoz. 
  u. 
  Spong. 
  d. 
  braun. 
  

   Jura, 
  p. 
  3 
  (1867); 
  Yine, 
  On 
  Polyzoa 
  of 
  Caen 
  and 
  Ranville, 
  p. 
  12 
  

   (1888). 
  

  

  Zocecial 
  length 
  06 
  millim., 
  width 
  0*17 
  to 
  0*1 
  ; 
  aperture 
  0-06. 
  

  

  The 
  elongated 
  slender 
  zocecia 
  of 
  subcorneal 
  form 
  seem 
  to 
  fairly 
  

   distinguish 
  the 
  species. 
  

  

  Haime 
  f 
  figures 
  the 
  zocecia 
  widening 
  from 
  distal 
  to 
  proximal 
  

   extremity 
  ; 
  one 
  meets, 
  however, 
  with 
  a 
  varying 
  form 
  in 
  which 
  the 
  

   cells 
  are 
  leathern-bottle-shaped. 
  

  

  Yar. 
  attenuata. 
  (PI. 
  XYIII. 
  fig. 
  9.) 
  

  

  Zocecial 
  length 
  0*6 
  millim., 
  width 
  0*2; 
  aperture 
  0*07. 
  

  

  Zoarium 
  uniserial, 
  but 
  with 
  zocecia 
  of 
  nearly 
  uniform 
  thickness, 
  

   excepting 
  the 
  slightly 
  tapering 
  free 
  part, 
  which 
  rises 
  almost 
  vertically, 
  

   and 
  is 
  j 
  the 
  length 
  of 
  the 
  whole 
  cell. 
  The 
  adherent 
  part 
  of 
  the 
  

   zoarium 
  is 
  scarcely 
  dilated. 
  I 
  can 
  detect 
  two 
  kinds 
  of 
  surface- 
  

  

  * 
  " 
  Krifc 
  fort, 
  ofver 
  Skand. 
  Hafs-Bryozoer," 
  af 
  F. 
  A. 
  Smitt, 
  Ofvers. 
  af 
  

   K. 
  Yet.-Akad. 
  Fork. 
  1866, 
  p. 
  402. 
  

  

  t 
  "Descr. 
  des 
  Bryozoaires 
  Foss." 
  par 
  Jules 
  Haime, 
  Mem. 
  Soc. 
  Geol. 
  de 
  

   France, 
  2 
  e 
  serie, 
  t. 
  v. 
  pi. 
  1. 
  fig. 
  1 
  (1854). 
  

  

  