﻿art. 
  21 
  CYCLOSTOMATOUS 
  BRYOZOA 
  CANU 
  AND 
  BASSLEE 
  7 
  

  

  From 
  our 
  study 
  of 
  the 
  Sainte-Croix 
  specimens 
  we 
  have 
  observed: 
  

  

  (1) 
  The 
  variety 
  alectodes 
  Gregory, 
  1S99 
  (p. 
  38), 
  known 
  hitherto 
  

   only 
  from 
  the 
  Upper 
  Cretaceous, 
  is 
  now 
  recognized 
  in 
  the 
  Lower 
  

   Cretaceous 
  by 
  specimens 
  indicating 
  it 
  is 
  only 
  one 
  of 
  the 
  zoarial 
  

   forms. 
  

  

  (2) 
  A 
  specimen 
  was 
  noted 
  expanded 
  almost 
  into 
  the 
  Berenicea 
  

   growth 
  form, 
  as 
  in 
  the 
  variety 
  elevata 
  Gregory, 
  1899, 
  from 
  the 
  

   Lower 
  Cretaceous. 
  

  

  (3) 
  Another 
  specimen 
  corresponds 
  rigorously 
  to 
  the 
  figure 
  pub- 
  

   lished 
  by 
  D'Orbigny. 
  

  

  Occurrence. 
  — 
  Lower 
  Cretaceous 
  (Valangian) 
  : 
  Sainte-Croix 
  (Vaud), 
  

   Switzerland, 
  Censeau 
  (Doubs), 
  Villers-le-lac 
  (Jura), 
  and 
  Berklingen 
  

   (Germain 
  e) 
  , 
  France. 
  

  

  Plesiotype.—Csit. 
  No. 
  69834, 
  U.S.N.M. 
  

  

  PROBOSCINA 
  RADIOLITORUM 
  D'Orbigny, 
  1851 
  

  

  Plate 
  27, 
  figs. 
  1, 
  2 
  

  

  1899. 
  Proboscina 
  radiolitorum 
  Gregory, 
  Catalogue 
  of 
  the 
  Cretaceous 
  Bryozoa 
  in 
  

   the 
  British 
  Museum, 
  vol. 
  1, 
  p. 
  48, 
  pi. 
  3, 
  fig. 
  5. 
  (Bibliography, 
  geolog- 
  

   ical 
  distribution.) 
  

  

  The 
  figured 
  specimen 
  is 
  incrusting 
  a 
  sponge. 
  Although 
  this 
  species 
  

   is 
  easy 
  to 
  determine, 
  it 
  has 
  not 
  hitherto 
  been 
  observed 
  in 
  the 
  Lower 
  

   Cretaceous. 
  

  

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

  

  Pletdotype.— 
  Cat. 
  No. 
  69835, 
  U.S.N.M. 
  

  

  PROBOSCINA 
  Z1C-ZAC 
  D'Orbigny, 
  1853 
  

  

  Plate 
  29, 
  fig. 
  7 
  

  

  1853. 
  Proboscina 
  zic-zac 
  D'Orbigny, 
  Paleontologie 
  francaise, 
  Terrain 
  Cr6tac6, 
  vol. 
  

   5, 
  p. 
  847. 
  pi. 
  631, 
  figs. 
  6, 
  7. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  orifice, 
  0.08 
  mm.; 
  diameter 
  of 
  peri- 
  

   stome, 
  0.16 
  mm.; 
  length 
  of 
  zooecium, 
  0.32-0.40 
  mm. 
  It 
  seems 
  to 
  us 
  

   that 
  Gregory 
  is 
  in 
  error 
  in 
  identifying 
  this 
  species 
  with 
  Proboscina 
  

   fasciculata 
  Reuss. 
  The 
  micrometric 
  dimensions 
  are 
  different. 
  

  

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

  

  Geological 
  distribution. 
  — 
  Lower 
  Cretaceous 
  (Neocomian) 
  : 
  Vassy 
  

   (Haute 
  Marne), 
  France, 
  and 
  Sainte-Croix 
  (Vaud), 
  Switzerland 
  

   (D'Orbigny). 
  

  

  Plesiotype.—C&t. 
  No. 
  69840, 
  U.S.N.M. 
  

  

  PROBOSCINA 
  RICORDEAUANA 
  D'Orbigny, 
  1853 
  

  

  Plate 
  27, 
  figs. 
  7, 
  8 
  

  

  1853. 
  Proboscina 
  ricordeauana 
  D'Orbigny, 
  Paleontologie 
  franchise, 
  Terrain 
  Cr6- 
  

   tace, 
  vol. 
  5, 
  p. 
  850, 
  pi. 
  750, 
  fig. 
  6. 
  

  

  The 
  specimen 
  which 
  we 
  illustrate 
  seems 
  to 
  agree 
  very 
  well 
  with 
  

   the 
  one 
  figured 
  by 
  D'Orbigny. 
  It 
  incrusts 
  a 
  sponge. 
  

  

  