﻿art. 
  21 
  CYCLOSTOMATOUS 
  BRYOZOA 
  CANU 
  AND 
  BASSLER 
  11 
  

  

  BEKENICEA 
  GRANDIPORA, 
  new 
  species 
  

  

  Plate 
  28, 
  figs. 
  2, 
  3 
  

  

  Description. 
  — 
  The 
  zoarium 
  encrusts 
  sponges. 
  The 
  tubes 
  are 
  

   arranged 
  in 
  fan-shape 
  around 
  the 
  ancestrula 
  and 
  form 
  an 
  irregularly 
  

   discoid 
  colony; 
  they 
  are 
  visible, 
  convex, 
  separated 
  by 
  a 
  furrow, 
  some- 
  

   what 
  wrinkled 
  transversely, 
  and 
  often 
  swollen 
  in 
  their 
  median 
  part. 
  

   The 
  peristome 
  is 
  orbicular, 
  thin, 
  little 
  salient. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  orifice, 
  0.12-0.15 
  mm.; 
  diameter 
  of 
  

   peristome, 
  0.24 
  mm.; 
  diameter 
  of 
  tubes, 
  0.32mm.; 
  distance 
  of 
  tubes, 
  

   0.66 
  mm.; 
  separation 
  of 
  tubes, 
  1 
  mm. 
  

  

  Affinities. 
  — 
  Gregory, 
  1899, 
  has 
  figured 
  from 
  the 
  Aptian 
  of 
  the 
  Isle 
  

   of 
  Wight 
  (pi. 
  5, 
  fig. 
  1) 
  under 
  the 
  erroneous 
  name 
  of 
  Berenicea 
  

   gracilis 
  Milne-Edwards, 
  1838, 
  a 
  specimen 
  in 
  which 
  the 
  dimensions 
  

   are 
  very 
  close 
  to 
  our 
  species 
  and 
  which 
  could 
  indeed 
  be 
  the 
  same 
  

   species. 
  This 
  species 
  has 
  much 
  larger 
  micrometric 
  dimensions 
  than 
  

   Berenicea 
  gracilis 
  Milne-Edwards, 
  183S, 
  and 
  Berenicea 
  fabelliformis 
  

   Koemer, 
  1839, 
  which 
  Gregory 
  incorrectly 
  identified 
  with 
  B. 
  gracilis 
  

  

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

  

  Holotype.— 
  Cat. 
  No. 
  69846, 
  U.S.N.M. 
  

  

  BERENICEA 
  FARINGDONENSIS, 
  new 
  species 
  

  

  Plate 
  29, 
  figs. 
  5, 
  6 
  

  

  Description. 
  — 
  The 
  zoarium 
  encrusts 
  sponges 
  in 
  lamellae 
  with 
  irreg- 
  

   ular 
  edges. 
  The 
  tubes 
  are 
  indistinct, 
  smooth, 
  somewhat 
  convex. 
  

   The 
  peristome 
  is 
  thick, 
  salient, 
  perpendicular 
  to 
  the 
  zooecial 
  plane, 
  

   orbicular. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  orifice, 
  0.15-0.16 
  mm.; 
  diameter 
  of 
  

   peristome, 
  0.20 
  mm.; 
  distance 
  of 
  peristomes, 
  0.70-0.80 
  mm.; 
  separa- 
  

   tion 
  of 
  peristomes, 
  0.60-0.64 
  mm. 
  

  

  Affinities. 
  — 
  This 
  large 
  species 
  differs 
  from 
  Berenicea 
  grandipora 
  

   new 
  species 
  in 
  the 
  irregular 
  arrangements 
  of 
  its 
  peristomes 
  and 
  in 
  its 
  

   indistinct 
  tubes. 
  

  

  In 
  exterior 
  aspect 
  it 
  resembles 
  Diastopora 
  neocomiensis 
  De 
  Loriol, 
  

   1863, 
  but 
  differs 
  in 
  its 
  incrusting 
  zoarium 
  and 
  its 
  much 
  larger 
  

   dimensions. 
  

  

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

  

  Holotype.— 
  Cat. 
  No. 
  69847, 
  U.S.N.M. 
  

  

  BERENICEA 
  FILIFERA, 
  new 
  species 
  

  

  Plate 
  29, 
  figs 
  3, 
  4 
  

   Description. 
  — 
  The 
  zoarium 
  encrusts 
  sponges 
  in 
  thin 
  and 
  irregular 
  

   lamellae. 
  The 
  tubes 
  are 
  arranged 
  in 
  quincunx, 
  much 
  scattered; 
  

   they 
  are 
  distinct, 
  separated 
  by 
  a 
  salient 
  thread, 
  concave 
  in 
  the 
  longi- 
  

   tudinal 
  direction; 
  the 
  frontal 
  is 
  ornamented 
  with 
  small 
  salient 
  in- 
  

   terrupted, 
  longitudinal 
  threads. 
  The 
  peristome 
  is 
  orbicular, 
  thick, 
  

   salient, 
  perpendicular 
  to 
  the 
  zooecial 
  plane. 
  

  

  