﻿10 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  tol.67 
  

  

  accord 
  with 
  that 
  of 
  Gregory, 
  but 
  the 
  zoarium 
  is 
  only 
  2 
  mm. 
  in 
  diam- 
  

   eter. 
  In 
  exterior 
  aspect 
  it 
  corresponds 
  still 
  more 
  to 
  Discosparsa 
  

   cupula 
  D'Orbigny, 
  1852, 
  from 
  the 
  French 
  Turonian, 
  but 
  our 
  zoarium 
  

   is 
  not 
  free, 
  as 
  it 
  incrusts 
  a 
  shell. 
  

  

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

   Switzerland. 
  

  

  Plesiotype.— 
  Cat. 
  No. 
  69841, 
  U.S.N.M. 
  

  

  BERENICEA 
  PARVULA, 
  new 
  species 
  

  

  Plate 
  28, 
  figs. 
  8, 
  9 
  

  

  Description. 
  — 
  The 
  zoarium 
  encrusts 
  sponges, 
  in 
  a 
  small 
  flabelliform 
  

   lamella. 
  The 
  tubes 
  are 
  distinct, 
  very 
  convex, 
  separated 
  by 
  a 
  deep 
  

   furrow, 
  smooth, 
  very 
  small. 
  The 
  peristomes 
  when 
  broken 
  are 
  ellip- 
  

   tical 
  but 
  intact 
  are 
  orbicular 
  and 
  oblique, 
  always 
  thin. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  orifice, 
  0.06 
  mm.; 
  diameter 
  of 
  tubes, 
  

   0.12 
  mm. 
  ; 
  distance 
  of 
  peristomes, 
  0.32 
  mm. 
  ; 
  separation 
  of 
  peristomes, 
  

   0.40 
  mm. 
  

  

  Affinities. 
  — 
  This 
  species 
  is 
  still 
  smaller 
  than 
  Berenicea 
  gracilis 
  

   Milne-Edwards, 
  1838. 
  It 
  is 
  distinguished 
  again 
  by 
  the 
  rectilinear 
  

   form 
  of 
  the 
  tubes 
  and 
  by 
  its 
  separation 
  always 
  superior 
  to 
  the 
  

   distance. 
  

  

  The 
  convexity 
  of 
  the 
  tubes, 
  the 
  flabellate 
  arrangement, 
  the 
  great 
  

   saliency 
  of 
  the 
  peristome, 
  and 
  the 
  still 
  smaller 
  zooecial 
  dimensions 
  

   do 
  not 
  permit 
  confusion 
  with 
  Berenicea 
  puichella 
  De 
  Loriol, 
  1863. 
  

  

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

   (very 
  rare) 
  . 
  

  

  Hohtype.—C&t. 
  No. 
  69842, 
  U.S.N.M. 
  

  

  BERENICEA 
  PULCHELLA 
  De 
  Loriol, 
  1863 
  

  

  Plate 
  28, 
  fig. 
  4 
  

  

  1863. 
  Berenicea 
  puichella 
  De 
  Loriol, 
  Les 
  invertdbrds 
  du 
  Neocomien 
  inferieur 
  du 
  

   Mont 
  Saleve 
  pres 
  Geneve, 
  p. 
  135, 
  pi. 
  16, 
  fig. 
  9. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  orifice, 
  0.10 
  mm.; 
  diameter 
  of 
  tubes, 
  

   0.16 
  mm.; 
  distance 
  of 
  peristomes, 
  0.40-0.48 
  mm.; 
  separation 
  of 
  

   peristomes, 
  0.48 
  mm. 
  

  

  Affinities. 
  — 
  The 
  type 
  at 
  the 
  Museum 
  of 
  Geneva 
  is 
  not 
  very 
  well 
  

   preserved; 
  our 
  determination, 
  based 
  solely 
  on 
  the 
  small 
  micrometric 
  

   measurements, 
  is 
  therefore 
  a 
  little 
  doubtful. 
  The 
  studied 
  specimens 
  

   were 
  incrusting 
  Meliceritites. 
  

  

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

   (very 
  rare). 
  Lower 
  Cretaceous 
  (Valangian): 
  Sainte-Croix 
  (Vaud), 
  

   Switzerland. 
  

  

  Plesiotype.— 
  Cat. 
  No. 
  69845, 
  U.S.N.M. 
  

  

  