﻿896 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  This 
  genus 
  was 
  found 
  to 
  include 
  those 
  species 
  having 
  a 
  carina 
  

   expanded 
  at 
  the 
  summit, 
  with 
  a 
  row 
  of 
  pores 
  on 
  the 
  expanded 
  

   portion. 
  On 
  the 
  non-celluliferous 
  face 
  there 
  are 
  numerous 
  con- 
  

   spicuous 
  pores 
  with 
  elevated 
  peristomes, 
  triangular, 
  circular 
  or 
  

   rhomboidal. 
  

  

  In 
  the 
  type-species 
  the 
  pores 
  on 
  the 
  summit 
  of 
  the 
  caiinae 
  

   show 
  plainly. 
  In 
  other 
  forms 
  I 
  have 
  been 
  unable 
  to 
  discover 
  

   these 
  pores, 
  but 
  it 
  may 
  have 
  been 
  owing 
  to 
  the 
  condition 
  of 
  the 
  

   specimens. 
  

  

  KETEPOKELLA, 
  nov. 
  gen. 
  

  

  The 
  name 
  Retepora 
  has 
  been 
  applied 
  to 
  those 
  forms 
  of 
  

   FenestellidaB, 
  of 
  which 
  the 
  branches 
  anastomose 
  at 
  regular 
  inter- 
  

   vals, 
  forming 
  oval 
  or 
  lenticular 
  fenestrules 
  and 
  having 
  on 
  the 
  

   celluliferous 
  face 
  three 
  or 
  more 
  ranges 
  of 
  cell 
  apertures. 
  The 
  

   name 
  Ketepora 
  was 
  first 
  given 
  by 
  Lamarck 
  to 
  recent 
  forms, 
  

   which 
  differ 
  generically 
  from 
  those 
  above 
  described. 
  For 
  these 
  

   fossil 
  forms 
  the 
  name 
  Keteporella 
  is 
  proposed. 
  They 
  differ 
  

   from 
  Reteporina 
  of 
  D'Orbigny 
  in 
  the 
  same 
  manner 
  as 
  Folypora 
  

   differs 
  from 
  Fenestella, 
  i. 
  e., 
  in 
  having 
  three 
  or 
  more 
  ranges 
  of 
  

   cell 
  apertures. 
  

  

  The 
  genus 
  Reteporina 
  was 
  founded 
  by 
  D'Orbigny 
  in 
  1847 
  to 
  

   include 
  those 
  species 
  of 
  FenestellidaB 
  having 
  the 
  cellules 
  "placees 
  

   sur 
  deux 
  lignes 
  paralles, 
  rapproches 
  regulieres, 
  longitudinales, 
  

   non 
  separees 
  par 
  une 
  cote 
  sont 
  a 
  la 
  partie 
  superieure 
  de 
  branches 
  

   largement 
  anastomosees, 
  de 
  maniere 
  a 
  ne 
  laisser 
  entre 
  elles 
  que. 
  

   de 
  oscules 
  oblonges 
  reguliers 
  places 
  par 
  lignes 
  divergentes." 
  

  

  D'Orbigny 
  did 
  not 
  illustrate 
  his 
  genus, 
  and 
  it 
  is 
  possible 
  that 
  

   the 
  specimen 
  would 
  show 
  that 
  I 
  have 
  misunderstood 
  his 
  descrip- 
  

   tion, 
  lie 
  says 
  that 
  the 
  rows 
  of 
  apertures 
  are 
  not 
  separated 
  by 
  a 
  

   ridge, 
  but 
  the 
  presence 
  or 
  absence 
  of 
  such 
  a 
  ridge 
  does 
  not 
  make 
  

   a 
  generic 
  difference, 
  though, 
  as 
  already 
  shown, 
  species 
  may 
  be 
  

   placed 
  in 
  different 
  groups 
  of 
  the 
  same 
  genus 
  from 
  the 
  character 
  

   of 
  the 
  carinas. 
  

  

  The 
  idea 
  I 
  have 
  formed 
  from 
  D'Orbigny's 
  description 
  is 
  that 
  

   of 
  a 
  fenestelloid 
  form 
  whose 
  branches 
  are 
  sinuous 
  and 
  anasto- 
  

   mosing, 
  having 
  two 
  ranges 
  of 
  cell 
  apertures 
  on 
  the 
  celluliferous 
  

   face, 
  a 
  good 
  example 
  of 
  the 
  genus 
  being 
  Reteporina 
  striata 
  of 
  the 
  

   Hamilton 
  group. 
  (Annual 
  Report 
  of 
  the 
  State 
  Museum 
  for 
  1886, 
  

   pi. 
  iii, 
  figs. 
  1-6.) 
  

  

  