﻿akt. 
  21 
  CYCLOSTOMATOUS 
  BRYOZOA 
  CANU 
  AND 
  BASSLER 
  5 
  

  

  Order 
  CYCLOSTOMATA 
  Busk 
  

   Division 
  INOV1CELLATA 
  

  

  Family 
  DIASTOPORIDAE 
  Gregory, 
  1899 
  

  

  Forma 
  STOMATOPORA 
  Bronn, 
  1825 
  

  

  STOMATOPORA 
  CALYPSO 
  D'Orbigny, 
  1850 
  

  

  Plate 
  26, 
  fig. 
  11 
  

  

  1899. 
  Stomatopora 
  calypso 
  Gregory, 
  Catalogue 
  of 
  the 
  Cretaceous 
  Bryozoa 
  in 
  the 
  

   British 
  Museum, 
  vol. 
  1, 
  p. 
  19, 
  pi. 
  1, 
  figs. 
  8, 
  9. 
  (Bibliography, 
  geologi- 
  

   cal 
  distribution.) 
  

  

  Our 
  specimen 
  approaches, 
  in 
  its 
  small 
  oral 
  dimensions, 
  Figure 
  9 
  of 
  

   Gregory, 
  1899, 
  which 
  represents 
  a 
  specimen 
  from 
  the 
  Albian 
  of 
  Hun- 
  

   stanton. 
  Here 
  the 
  aperture 
  measures 
  only 
  0.10 
  mm. 
  in 
  diameter. 
  

  

  Occurrence. 
  — 
  Lower 
  Cretaceous 
  (Aptian) 
  : 
  Faringdon, 
  England. 
  

  

  Plesiotype.— 
  Cat. 
  No. 
  69829, 
  U.S.N.M. 
  

  

  STOMATOPORA 
  FILIFORMIS 
  De 
  Loriol, 
  1863 
  

  

  1863. 
  Stomatopora 
  filiformis 
  De 
  Loriol, 
  Les 
  invert6br6s 
  du 
  Neocomien 
  inferieur 
  

   du 
  Mont 
  Saleve, 
  p. 
  132, 
  pi. 
  16, 
  figs. 
  6, 
  7. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  orifice, 
  0.08 
  by 
  0.10 
  mm. 
  (0.07- 
  

   0.10 
  mm.); 
  diameter 
  of 
  peristome, 
  0.12 
  mm.; 
  diameter 
  of 
  zooecium, 
  

   0.14 
  mm. 
  (0.15-0.17 
  mm.); 
  length 
  of 
  zooecium, 
  0.56-0.60 
  mm. 
  (0.50- 
  

   0.70 
  mm.). 
  The 
  Sainte 
  Croix 
  specimens 
  are 
  mediocre, 
  and 
  we 
  have 
  

   based 
  our 
  determination 
  on 
  a 
  good 
  specimen 
  from 
  the 
  Canu 
  collec- 
  

   tion, 
  in 
  which 
  the 
  orifice 
  is 
  elliptical. 
  The 
  measurements 
  in 
  paren- 
  

   theses 
  are 
  the 
  extremes 
  shown 
  on 
  specimens 
  from 
  the 
  Geneva 
  Museum 
  

   determined 
  by 
  De 
  Loriol. 
  

  

  Occurrence. 
  — 
  Lower 
  Cretaceous: 
  Mont 
  Saleve, 
  near 
  Geneva 
  (Haut- 
  

   ervian) 
  and 
  Sainte 
  Croix 
  (Valangian), 
  Switzerland. 
  

  

  Cat. 
  No. 
  69830, 
  U.S.N.M. 
  

  

  STOMATOPORA 
  GRANULATA, 
  var. 
  NEOCOMIENSIS, 
  new 
  yariety 
  

  

  1838. 
  Alecto 
  granulata 
  Milne 
  Edwards, 
  Me'rnoire 
  sur 
  les 
  Crisies, 
  Annales 
  

  

  Sciences 
  naturelles, 
  vol. 
  9, 
  p. 
  205, 
  pi. 
  16, 
  fig. 
  3. 
  

   1853. 
  Stomatopora 
  granulata 
  D'Orbigny, 
  Paleontologie 
  francaise, 
  Terrain 
  Cr6- 
  

  

  tace, 
  vol. 
  5, 
  p. 
  836, 
  pi. 
  628, 
  figs. 
  5-8. 
  

   1868. 
  Stomatopora 
  granulata 
  De 
  Loriol, 
  Monographic 
  des 
  couches 
  de 
  etage 
  

  

  Valangien 
  d'Arzier 
  (Vaud), 
  Paleontologie 
  Suisse, 
  ser. 
  4, 
  pi. 
  5, 
  fig. 
  12. 
  

  

  Gregory, 
  1899 
  (p. 
  3), 
  published 
  a 
  long 
  synonomy 
  of 
  this 
  species, 
  

   in 
  which 
  the 
  geological 
  occurrence 
  is 
  also 
  equally 
  great. 
  This 
  does 
  

   not 
  seem 
  to 
  us 
  perfectly 
  exact 
  and 
  we 
  prefer 
  to 
  form 
  a 
  special 
  vari- 
  

   ety 
  for 
  the 
  Lower 
  Cretaceous 
  specimens 
  corresponding 
  to 
  the 
  figures 
  

   of 
  Milne 
  Edwards 
  and 
  of 
  D'Orbigny. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  orifice, 
  0.10 
  mm.; 
  diameter 
  of 
  zooe- 
  

   cium, 
  0.30 
  mm.; 
  length 
  of 
  zooecium, 
  0.70 
  mm. 
  

  

  