﻿art. 
  2i 
  CYCLOSTOMATOUS 
  BRYOZOA 
  CANU 
  AND 
  BASSLER 
  67 
  

  

  Geological 
  distribution. 
  — 
  Lower 
  Cretaceous 
  (Cenomanian) 
  : 
  Le 
  

   Mans 
  (Sarthe), 
  France, 
  Warminster, 
  England, 
  and 
  Plauen, 
  Germany. 
  

   Plesiotype. 
  —Cat. 
  No. 
  69918, 
  U.S.N.M. 
  

  

  MELICERITITES, 
  species 
  undetermined 
  

  

  Plate 
  12, 
  figs. 
  13-15 
  

  

  We 
  have 
  found 
  two 
  very 
  curious 
  specimens 
  of 
  Meliceritites, 
  one 
  

   with 
  all 
  the 
  facettes 
  perforated 
  and 
  the 
  other 
  with 
  some 
  of 
  them 
  

   perforated. 
  These 
  perforations 
  are 
  enigmatical. 
  We 
  believe 
  the 
  

   specimen 
  worthy 
  of 
  illustration, 
  but 
  we 
  are 
  unable 
  to 
  affirm 
  that 
  they 
  

   belong 
  to 
  a 
  special 
  species 
  until 
  a 
  larger 
  number 
  of 
  examples 
  has 
  been 
  

   collected. 
  

  

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

  

  Cat. 
  No. 
  69919, 
  U.S.N.M. 
  

  

  Subdivision 
  Rectangulata 
  

   Family 
  CERIOCAVIDAE 
  Canu 
  and 
  Bassler, 
  1922 
  

  

  Genus 
  CERIOCAVA 
  D'Orbigny, 
  1852 
  

  

  (See 
  Canu 
  and 
  Bassler, 
  1922, 
  for 
  definition) 
  

  

  CERIOCAVA 
  GRANDIPORA, 
  new 
  species 
  

  

  Plate 
  9, 
  figs. 
  14-17 
  

  

  Description. 
  — 
  The 
  zoarium 
  is 
  free, 
  arborescent, 
  formed 
  of 
  cylindri- 
  

   cal 
  or 
  compressed 
  branches; 
  the 
  base 
  is 
  quite 
  small, 
  orbicular, 
  non- 
  

   adherent 
  to 
  the 
  substratum. 
  The 
  orifices 
  are 
  large, 
  polygonal, 
  

   arranged 
  in 
  quincunx 
  or 
  in 
  transverse 
  rows. 
  The 
  ovicell 
  is 
  capsule- 
  

   shaped, 
  deep, 
  digitate, 
  with 
  an 
  exterior 
  concave 
  and 
  smooth 
  surface. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  orifice, 
  0.32-0.40 
  mm.; 
  diameter 
  of 
  

   large 
  branches, 
  4 
  mm. 
  

  

  Affinities. 
  — 
  This 
  species 
  is 
  well 
  characterized 
  by 
  the 
  large 
  size 
  of 
  its 
  

   orifices 
  and 
  by 
  its 
  digitate 
  ovicell. 
  In 
  the 
  Jurassic 
  species 
  the 
  ovi- 
  

   cells 
  are 
  entire 
  and 
  nondigitate. 
  

  

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

   Switzerland 
  (very 
  rare) 
  . 
  

  

  Cotypes.—C&t. 
  No. 
  69920, 
  U.S.N.M. 
  

  

  CERIOCAVA 
  JUNCTATA, 
  new 
  species 
  

  

  Plate 
  9, 
  figs. 
  11-13 
  

  

  Description. 
  — 
  The 
  zoarium 
  is 
  hollow, 
  cylindrical, 
  formed 
  of 
  frag- 
  

   ments 
  irregularly 
  joined 
  together 
  or 
  anastomosing; 
  the 
  branches 
  are 
  

   solid, 
  with 
  the 
  normal 
  section. 
  The 
  orifices 
  are 
  elliptical, 
  placed 
  at 
  

   the 
  bottom 
  of 
  a 
  polygonal 
  peristome; 
  they 
  are 
  arranged 
  in 
  quincunx. 
  

  

  