﻿CYCL.OSTOMATOUS 
  BRYOZOA 
  CANU 
  AND 
  BASSLER 
  

  

  39 
  

  

  In 
  transverse 
  section 
  the 
  tubes 
  are 
  polygonal, 
  with 
  thin 
  walls 
  

   adjacent. 
  The 
  tubes 
  adjacent 
  to 
  the 
  lamella 
  are 
  small, 
  because 
  

   they 
  correspond 
  to 
  the 
  inferior 
  part 
  of 
  the 
  tubes. 
  

  

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

   land; 
  Hauterivian, 
  Censeau 
  (Doubs), 
  France 
  (Valangian) 
  , 
  Fontenay 
  

   and 
  Auxerre 
  (Yonne) 
  , 
  France 
  (Rhodonian) 
  . 
  

  

  Plesioty 
  pes. 
  —Cat. 
  No. 
  69884, 
  U.S.N.M. 
  

  

  TRIGONOECIA 
  HAIMEANA 
  De 
  Loriol, 
  1863 
  

  

  Plate 
  1, 
  figs. 
  6-12 
  

  

  1863. 
  Reptomultisparsa 
  haimeana 
  De 
  Loriol, 
  Les 
  Invertebres 
  du 
  Neocomien 
  

   inf6rieur 
  du 
  Mont 
  Saleve 
  pres 
  Geneve, 
  vol. 
  2, 
  p. 
  136, 
  pi. 
  17, 
  fig. 
  4. 
  

  

  1S83. 
  Reptomultisparsa 
  haimeana 
  Keeping, 
  Fossils 
  of 
  the 
  Neocomian 
  of 
  Upware 
  

   and 
  Brickhill 
  (Cambridgeshire 
  and 
  Bedfordshire), 
  p. 
  137. 
  

  

  1S99. 
  Reptomultisparsa 
  haimei 
  Gregory, 
  Catalogue 
  of 
  Cretaceous 
  Bryozoa 
  in 
  

   the 
  British 
  Museum, 
  vol. 
  1, 
  p. 
  117, 
  fig. 
  5. 
  

   Measurements.— 
  

  

  Diameter 
  of 
  aperture... 
  

   Diameter 
  of 
  peristome 
  . 
  

  

  Diameter 
  of 
  tubes 
  

  

  Distance 
  of 
  peristomes.. 
  

   Separation 
  of 
  peristomes 
  

  

  Ste.-Croix 
  

  

  Mm. 
  

   0.10 
  

   .16 
  

   .20 
  

  

  . 
  72- 
  80 
  

   .72 
  

  

  Faringdon 
  

  

  Mm. 
  

   0.10 
  

   .16 
  

   .20 
  

   .64 
  

   . 
  48- 
  60 
  

  

  Gregory 
  

  

  Mm. 
  

   0.10 
  

  

  Type 
  

  

  Mm 
  

   0.10 
  

  

  20- 
  .25 
  

   . 
  60-1. 
  00 
  

  

  , 
  18-. 
  22 
  

  

  Affinities. 
  — 
  De 
  Loriol's 
  type 
  is 
  not 
  very 
  well 
  preserved, 
  but 
  our 
  

   specimens, 
  which 
  we 
  have 
  compared 
  with 
  it, 
  are 
  much 
  better. 
  

  

  The 
  zoarium 
  incrusts 
  sponges 
  and 
  shells 
  over 
  considerable 
  surfaces 
  

   (fig. 
  6) 
  . 
  The 
  large 
  transverse 
  overlapping 
  wrinkles 
  characteristic 
  of 
  

   the 
  species 
  have 
  been 
  observed 
  in 
  specimens 
  from 
  Sainte-Croix 
  (fig. 
  7) 
  , 
  

   as 
  well 
  as 
  Faringdon 
  (fig. 
  10). 
  The 
  ovicell 
  is 
  triangular, 
  very 
  convex, 
  

   and 
  quite 
  similar 
  to 
  that 
  in 
  other 
  species 
  of 
  the 
  genus. 
  Its 
  dimen- 
  

   sions 
  are 
  quite 
  variable, 
  varying 
  from 
  once 
  to 
  twice 
  the 
  size. 
  The 
  

   ovicell 
  shown 
  in 
  Figure 
  12 
  is 
  the 
  largest 
  one 
  observed. 
  

  

  Occurrence. 
  — 
  Lower 
  Cretaceous: 
  Varappe, 
  near 
  Geneva, 
  Switzer- 
  

   land 
  (De 
  Loriol) 
  (Hauterivian), 
  Sainte-Croix 
  (Vaud), 
  Switzerland 
  

   (Valangian); 
  Faringdon 
  and 
  Upware, 
  England 
  (Aptian). 
  

  

  Plesioty 
  pes. 
  —Cat. 
  Nos. 
  69885, 
  69886, 
  U.S.N.M. 
  

  

  TRIGONOECIA 
  (MESENTERIPORA) 
  NEOCOMIENSIS 
  D'Orbigny, 
  1853 
  

  

  Plate 
  2, 
  fig. 
  11 
  

  

  1853. 
  Mesenteripora 
  neocomiensis 
  D'Orbigny, 
  Pal6ontologie 
  frangaise, 
  Terrain 
  

   Cretace, 
  vol. 
  5, 
  p. 
  808, 
  pi. 
  756, 
  figs. 
  7-9. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  orifice, 
  0.14-0.16 
  mm.; 
  diameter 
  of 
  

   peristome, 
  0.18-0.20 
  mm.; 
  distance 
  of 
  peristomes, 
  1.00-1.20 
  mm.; 
  

   separation 
  of 
  peristomes, 
  0.70 
  mm. 
  

  

  