﻿8 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.67 
  

  

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

   Geological 
  distribution. 
  — 
  Lower 
  Cretaceous 
  (Aptian) 
  : 
  Les 
  Croutes, 
  

   Gurgy, 
  France 
  (D'Orbigny). 
  

  

  Plesiotype.—Csii. 
  No. 
  69836, 
  U.S.N.M. 
  

  

  PROBOSCINA 
  VIRGULA 
  D'Orbigny, 
  1853 
  

  

  Plate 
  27, 
  figs. 
  9, 
  10 
  

  

  1853. 
  Reptotubigera 
  virgula 
  D'Orbigny, 
  Paleontologie 
  francaise, 
  Terrain 
  Cre- 
  

   tace, 
  vol. 
  5, 
  p. 
  753, 
  pi. 
  631, 
  figs. 
  15-17. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  orifice, 
  0.06 
  mm.; 
  diameter 
  of 
  peri- 
  

   stome, 
  0.08 
  mm. 
  ; 
  distance 
  of 
  orifices, 
  0.32-0.40 
  mm. 
  The 
  peristomes 
  

   are 
  not 
  grouped 
  in 
  bundles, 
  and 
  we 
  are 
  ignorant 
  of 
  D'Orbigny's 
  rea- 
  

   son 
  for 
  classifying 
  this 
  species 
  in 
  his 
  genus 
  Reptotubigera. 
  

  

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

  

  Geological 
  distribution. 
  — 
  Cenomanian: 
  Le 
  Mans 
  (Sarthe), 
  France. 
  

  

  Plesiotype.— 
  Cut. 
  No. 
  69837, 
  U.S.N.M. 
  

  

  PROBOSCINA 
  DEPRESSA 
  D'Orbigny, 
  1853 
  

  

  Plate 
  27, 
  figs. 
  5, 
  6 
  

  

  1853. 
  Proboscina 
  depressa 
  D'Orbigny, 
  Paleontologie 
  francaise, 
  Terrain 
  Cr£tac6, 
  

   vol. 
  5, 
  p. 
  849, 
  pi. 
  631, 
  figs. 
  12-14. 
  

  

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

   stome, 
  0.10-0.12 
  mm.; 
  diameter 
  of 
  zooecium, 
  0.14 
  mm.; 
  distance 
  of 
  

   orifices, 
  0.48-0.60 
  mm. 
  The 
  fine 
  specimen 
  here 
  figured 
  incrusts 
  a 
  

   sponge. 
  It 
  corresponds 
  very 
  well 
  to 
  D'Orbigny's 
  description 
  and 
  

   figure. 
  

  

  The 
  type 
  preserved 
  in 
  the 
  Museum 
  of 
  Paris 
  is 
  worn, 
  according 
  to 
  

   Pergens, 
  1889. 
  With 
  our 
  new 
  illustration 
  we 
  are 
  able 
  to 
  maintain 
  

   D'Orbigny's 
  species. 
  

  

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

  

  Geological 
  distribution. 
  — 
  Lower 
  Cretacous 
  (Neocomian) 
  : 
  Vassy 
  and 
  

   Nozeroy, 
  France 
  (D'Orbigny). 
  

  

  Plesiotype.—C&t. 
  No. 
  69843, 
  U.S.N.M. 
  

  

  PROBOSCINA 
  COARCTATA, 
  new 
  species 
  

  

  Plate 
  28, 
  fig. 
  1 
  

  

  Description. 
  — 
  The 
  zoarium 
  encrusts 
  shells. 
  It 
  is 
  formed 
  of 
  diverg- 
  

   ing, 
  ramified 
  fronds, 
  each 
  of 
  which 
  is 
  claviform, 
  much 
  narrowed 
  at 
  

   the 
  base 
  and 
  contracted 
  in 
  its 
  inferior 
  third; 
  the 
  surface 
  is 
  covered 
  

   with 
  large 
  overlapping, 
  concentric 
  wrinkles. 
  The 
  tubes 
  are 
  invisible. 
  

   The 
  peristomes 
  are 
  very 
  salient, 
  thin, 
  and 
  much 
  scattered. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  orifice, 
  0.035 
  mm.; 
  diameter 
  of 
  peri- 
  

   stome, 
  0.08 
  mm.; 
  distance 
  of 
  peristomes, 
  0.40-0.80 
  mm.; 
  separation 
  

   of 
  peristomes, 
  0.40 
  mm. 
  The 
  distance 
  and 
  separation 
  of 
  the 
  peri- 
  

  

  