﻿CYCLOSTOMATOUS 
  BRYOZOA 
  — 
  CANU 
  AND 
  BASSLEE 
  

  

  29 
  

  

  CERIOPORA 
  DIMORPHOCELLA, 
  new 
  species 
  

  

  Plate 
  24, 
  figs. 
  1-6; 
  Plate 
  31, 
  figs 
  7, 
  8 
  

  

  Description. 
  — 
  The 
  zoarium 
  is 
  free, 
  subcylindrical, 
  with 
  short, 
  lobed 
  

   branches. 
  The 
  tubes 
  are 
  thick; 
  the 
  apertures 
  are 
  polygonal, 
  with 
  

   two 
  different 
  sizes, 
  and 
  ornamented 
  with 
  very 
  small 
  tongues. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  large 
  apertures, 
  0.08 
  mm.; 
  diameter 
  

   of 
  small 
  apertures, 
  0.04 
  mm.; 
  zoarial 
  diameter, 
  10 
  mm.; 
  minimum 
  

   height 
  of 
  fragments, 
  20 
  mm. 
  

  

  Structure. 
  — 
  The 
  fragments 
  found 
  do 
  not 
  show 
  the 
  base; 
  the 
  colony 
  

   should 
  be, 
  therefore, 
  rather 
  large 
  and 
  dendroid. 
  An 
  examination 
  of 
  

   the 
  surface 
  indicates 
  a 
  Heteropora; 
  the 
  large 
  apertures 
  are 
  surrounded 
  

   by 
  smaller 
  ones, 
  which 
  are 
  ft 
  *^*»i* 
  

  

  %\1 
  

  

  rather 
  regular 
  in 
  their 
  dimen- 
  

   sions. 
  But 
  in 
  meridian 
  sec- 
  

   tions 
  there 
  are 
  no 
  mesopores; 
  

   the 
  small 
  orifices 
  correspond 
  to 
  

   the 
  ordinary 
  tubes, 
  in 
  which 
  

   the 
  walls 
  are 
  thicker 
  on 
  the 
  zo- 
  

   arial 
  margin. 
  This 
  phenom- 
  

   enon 
  is, 
  moreover, 
  rather 
  ir- 
  

   regular, 
  as 
  tangential 
  sections 
  

   indicate. 
  There 
  are 
  neither 
  

   diaphragms 
  nor 
  zonal 
  lines. 
  

  

  Affinities. 
  — 
  This 
  species 
  

   differs 
  from 
  Ceriopora 
  fallax 
  

   in 
  its 
  much 
  larger 
  zoarium 
  

   and 
  in 
  its 
  smaller 
  micrometric 
  

   dimensions. 
  

  

  Occurrence. 
  — 
  Lower 
  Creta- 
  

   ceous 
  (Aptian) 
  : 
  Faringdon> 
  

   England 
  (rare). 
  

  

  Coty 
  pes. 
  —Cat. 
  No. 
  69872, 
  

   U.S.N.M. 
  

  

  1 
  a* 
  m 
  

  

  

  Fig. 
  H.— 
  CeriopoTa 
  dimorphocella, 
  new 
  species. 
  Portion 
  of 
  

   a 
  meridian 
  section, 
  X 
  16. 
  Lower 
  Cretaceous 
  (Aptian): 
  

   Faringdon, 
  England 
  

  

  REPTOMULTICAVA 
  FUNGIFORMIS 
  Gregory, 
  1909 
  

  

  Plate 
  24, 
  figs. 
  11-17 
  

  

  1909. 
  Reptomulticava 
  fungiformis 
  Gregory, 
  Catalogue 
  of 
  the 
  Cretaceous 
  Bryozoa 
  

   in 
  the 
  British 
  Museum, 
  vol. 
  2, 
  p. 
  135, 
  figs. 
  38, 
  39, 
  pi. 
  7, 
  fig. 
  6. 
  (Bib- 
  

   liography.) 
  

  

  Structure. 
  — 
  Our 
  specimens 
  are 
  much 
  smaller 
  than 
  those 
  in 
  the 
  

   British 
  Museum, 
  although 
  their 
  appearance 
  is 
  identical. 
  Moreover, 
  

   the 
  aperture 
  is 
  much 
  smaller 
  (0.10-0.12 
  mm. 
  and 
  not 
  0.20 
  mm.), 
  

   although 
  its 
  form 
  is 
  similar 
  to 
  that 
  figured 
  by 
  Gregory. 
  Finally, 
  our 
  

   sections 
  are 
  quite 
  similar 
  to 
  those 
  of 
  the 
  English 
  author. 
  It 
  appears 
  

  

  