﻿Plate 
  16 
  

  

  Page 
  

  

  Figs. 
  1—1. 
  L< 
  iosoecia 
  grandipora, 
  new 
  species 
  77 
  

  

  I. 
  Fragments, 
  natural 
  size. 
  

  

  '_', 
  '■). 
  A 
  bifurcated 
  specimen, 
  X 
  12, 
  and 
  surface, 
  <25. 
  Meso- 
  

   pores 
  are 
  rare. 
  

  

  4. 
  Ovieelled 
  specimen, 
  X25. 
  

  

  Lower 
  Cretaceous 
  (Valangian) 
  : 
  Sainte-Croix, 
  Switzer- 
  

   land. 
  

   Figs. 
  5-8. 
  Tretocycloecia 
  multiporosa, 
  new 
  species 
  83 
  

  

  5. 
  Branches, 
  natural 
  size. 
  

  

  6. 
  Extremity 
  of 
  an 
  ovieelled 
  specimen, 
  X12. 
  

  

  7, 
  8. 
  Ovieelled 
  specimen, 
  X 
  12, 
  and 
  surface, 
  <25. 
  The 
  ovi- 
  

   cell 
  is 
  broken 
  and 
  incomplete. 
  

   Lower 
  Cretaceous 
  (Aptian) 
  : 
  Faringdon, 
  England. 
  

  

  Figs. 
  9-14. 
  Tretocycloecia 
  densa, 
  new 
  species 
  83 
  

  

  9. 
  Zoaria] 
  fragments, 
  natural 
  size. 
  

   10. 
  Ovieelled 
  specimen, 
  X12. 
  The 
  ovicell 
  shows 
  a 
  por- 
  

   tion 
  of 
  the 
  enclosing 
  superior 
  lamella. 
  

  

  II. 
  Ovieelled 
  specimen, 
  X12, 
  exhibiting 
  the 
  transverse 
  

  

  section 
  of 
  a 
  broken 
  branch. 
  

  

  12. 
  Specimen 
  with 
  salient 
  peristomes, 
  X 
  12. 
  

  

  13. 
  Bifurcated, 
  ovieelled 
  fragment, 
  X12. 
  

  

  14. 
  Tangential 
  section, 
  X25. 
  

  

  Lower 
  Cretaceous 
  (Aptian): 
  Faringdon, 
  England. 
  

   Figs. 
  15—18. 
  Leiosoecia 
  aequiporosa, 
  new 
  species 
  75 
  

  

  15. 
  Fragments, 
  natural 
  size. 
  

  

  16. 
  Extremity 
  of 
  an 
  ovieelled 
  branch, 
  X12. 
  

  

  17. 
  Specimen, 
  X 
  12, 
  showing 
  the 
  internal 
  structure 
  of 
  

  

  the 
  ovicell. 
  

  

  18. 
  Portion 
  of 
  Figure 
  16, 
  X25. 
  

  

  19. 
  Tangential 
  thin 
  section, 
  X25. 
  

  

  Lower 
  Cretaceous 
  (Valangian) 
  : 
  Sainte-Croix, 
  Swit- 
  

   zerland. 
  

  

  109 
  

  

  