﻿Plate 
  4 
  

  

  Page 
  

   Figs. 
  1-4. 
  Nemalifera 
  reticulata 
  D'Orbigny, 
  L853 
  45 
  

  

  1. 
  Fragments, 
  natural 
  size. 
  

  

  2. 
  Bifurcated 
  branch, 
  nol 
  reticulated, 
  ■ 
  12. 
  

  

  3. 
  Portion 
  of 
  reticuLated 
  specimen, 
  L2. 
  

  

  4. 
  Same 
  specimen 
  as 
  3, 
  X25, 
  showing 
  a 
  regenerated 
  tube. 
  

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

   land. 
  

  

  Figs. 
  5 
  7. 
  Nematifera 
  incrustans,new 
  species 
  16 
  

  

  ."). 
  Zoarium, 
  natural 
  size. 
  

   G. 
  Portion 
  of 
  surface, 
  X12. 
  

  

  7. 
  Fragment 
  of 
  the 
  zoarial 
  surface, 
  X 
  12, 
  showing 
  the 
  ovi- 
  

  

  cell 
  (broken) 
  and 
  the 
  short 
  zone 
  of 
  growth. 
  

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

   land. 
  

   Figs. 
  8—11. 
  Nematifera 
  reticuloides, 
  new 
  species 
  17 
  

  

  8. 
  Fragments, 
  natural 
  size. 
  

  

  9. 
  Slightly 
  worn 
  specimen, 
  X12, 
  on 
  which 
  the 
  peristomes 
  

  

  are 
  arranged 
  in 
  close 
  transverse 
  groups 
  (Peripora). 
  

  

  10. 
  Extremity 
  of 
  a 
  young 
  bifurcated 
  branch, 
  > 
  12, 
  showing 
  

  

  the 
  zone 
  of 
  growth. 
  

  

  11. 
  Fragment 
  of 
  a 
  reticulated 
  specimen, 
  12. 
  

  

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

   land. 
  

  

  Fig. 
  l'-V 
  Nematifera 
  acuta 
  D'Orbigny, 
  1853 
  40 
  

  

  Fragment, 
  X12. 
  

  

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

   bios. 
  13-15. 
  Trigonoecia 
  tubulosa 
  D'Orbigny, 
  1853 
  37 
  

  

  13. 
  Zoaria, 
  rial 
  ural 
  size. 
  

  

  14. 
  Ovicelled 
  specimen, 
  X12. 
  The 
  oeciostome 
  is 
  minute 
  

  

  but 
  long 
  and 
  salient. 
  

  

  15. 
  Specimen, 
  X12, 
  showing 
  two 
  large 
  ovicells. 
  

   Lower 
  Cretaceous 
  (Valangian): 
  Sainte-Croix. 
  

  

  Switzerland. 
  

  

  Fig. 
  16. 
  Diaperoecia 
  simplex, 
  new 
  species 
  50 
  

  

  The 
  ovicelled 
  type 
  specimen, 
  X12. 
  

  

  Lower 
  Cretaceous 
  (Aptian) 
  : 
  Faringdon, 
  England. 
  

  

  97 
  

  

  