﻿24 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  

  

  Affinities. 
  — 
  This 
  new 
  species 
  differs 
  from 
  Ceriopora 
  ovoidea 
  in 
  its 
  

   larger 
  aperture 
  (0.12 
  mm. 
  and 
  not 
  0.10 
  mm.), 
  in 
  its 
  zoarium 
  broader 
  

   than 
  high, 
  and, 
  in 
  section, 
  in 
  the 
  zooecial 
  walls, 
  which 
  are 
  thicker 
  

   and 
  of 
  different 
  structure. 
  

  

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

   Switzerland 
  (common). 
  

  

  Cotypes.—C&t. 
  No. 
  69864, 
  U.S.N.M. 
  

  

  CERIOPORA 
  AEQUIPEDIS, 
  new 
  species, 
  

  

  Plate 
  22, 
  figs. 
  9-11 
  

  

  Description. 
  — 
  The 
  zoarium 
  is 
  irregularly 
  hemispherical, 
  generally 
  

   broader 
  than 
  high, 
  with 
  the 
  base 
  equal 
  to 
  the 
  zoarial 
  width. 
  The 
  

  

  orifices 
  are 
  polygonal 
  and 
  the 
  

   tubes 
  are 
  very 
  thick. 
  

  

  Measurements. 
  — 
  D 
  i 
  a 
  m 
  e 
  t 
  e 
  r 
  of 
  

   aperture, 
  0.12 
  mm.; 
  maximum 
  

   zoarial 
  diameter, 
  9 
  mm.; 
  maxi- 
  

   mum 
  zoarial 
  height, 
  5 
  mm. 
  

  

  Structure. 
  — 
  In 
  meridian 
  sec- 
  

   tion 
  the 
  tubes 
  are 
  long, 
  cylindri- 
  

   cal; 
  the 
  walls 
  are 
  moniliform, 
  

   with 
  large 
  vesicles. 
  The 
  zonal 
  

   lines 
  are 
  numerous, 
  very 
  close 
  to- 
  

   gether, 
  and 
  are 
  transformed 
  par- 
  

   tially 
  into 
  basal 
  lamellae. 
  

  

  Affinities. 
  — 
  Ceriopor 
  a 
  aequi- 
  

   pedis 
  differs 
  from 
  C. 
  angustipedis, 
  

   in 
  which 
  the 
  diameter 
  of 
  the 
  aper- 
  

   tures 
  is 
  ide 
  ntical, 
  in 
  the 
  hemi- 
  

  

  Fig. 
  8.— 
  Ceriopora 
  aequipedis, 
  new 
  species. 
  Merid- 
  Spherical 
  ZOarial 
  lorm, 
  111 
  the 
  Un- 
  

   ian 
  section, 
  X 
  10. 
  Lower 
  Cretaceous 
  (Valangian): 
  narrowed 
  base, 
  and, 
  in 
  Sections, 
  

   Sainte-Croix, 
  Switzerland 
  ,, 
  .,.. 
  , 
  

  

  m 
  the 
  monilnorm 
  tubes. 
  

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

   Switzerland 
  (rare). 
  

  

  Cotypes.—C&t. 
  No. 
  69865, 
  U.S.N.M. 
  

  

  CERIOPORA 
  SOLIDA, 
  new 
  specie 
  

  

  Plate 
  22, 
  figs. 
  6-8 
  

  

  Descriptions. 
  — 
  The 
  zoarium 
  is 
  free, 
  massive, 
  convex, 
  with 
  a 
  flat 
  or 
  

   concave 
  base 
  apparently 
  covered 
  by 
  many 
  enveloping 
  lamellae. 
  The 
  

   tubes 
  have 
  little 
  thickness; 
  the 
  apertures 
  are 
  large, 
  polygonal. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  apertures, 
  0.16 
  mm.; 
  zoarial 
  width^ 
  

   15 
  mm.; 
  zoarial 
  height, 
  9 
  mm. 
  

  

  Structure. 
  — 
  In 
  meridian 
  sections 
  the 
  tubes 
  are 
  long, 
  sinuous; 
  the 
  

   diaphragms 
  are 
  concave 
  and 
  numerous; 
  the 
  zooecial 
  walls 
  are 
  little 
  

  

  