﻿936 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum, 
  

  

  PARVIRETIS, 
  Reteporina 
  — 
  from 
  the 
  resemblance 
  of 
  the 
  frond 
  to 
  

   . 
  a 
  small 
  net. 
  

  

  PAUCIPOR 
  A, 
  Callotrypa 
  — 
  from 
  the 
  few 
  cell 
  apertures. 
  

  

  PAUCIRAMA, 
  Prismopora 
  — 
  from 
  the 
  distant 
  branches. 
  

  

  PAUCIRAMUS, 
  Thamni8cus 
  — 
  from 
  the 
  scarcity 
  of 
  branches. 
  

  

  PECULIARIS, 
  Fenestella 
  — 
  from 
  the 
  peculiar 
  appearance 
  of 
  the 
  

  

  frond. 
  

   PERARCTA, 
  Stictopora 
  — 
  very 
  narrow; 
  from 
  the 
  shape 
  of 
  the 
  frond. 
  

   PERCRASSA, 
  Polypora 
  — 
  very 
  thick; 
  from 
  the 
  unusual 
  thickness 
  of 
  

  

  the 
  frond. 
  

  

  PERELEGANS, 
  Callepora 
  — 
  from 
  the 
  beautiful 
  appearance 
  of 
  the 
  

  

  species. 
  

   PERFORATA, 
  Loculipora 
  — 
  the 
  fenestrules 
  of 
  the 
  caringe 
  and 
  non- 
  

  

  celluliferous 
  face 
  are 
  opposite, 
  so 
  that 
  the 
  frond 
  has 
  a 
  perforated 
  

  

  appearance. 
  

   PERMARGINATA, 
  Fenestella 
  — 
  from 
  the 
  strong 
  elevations 
  around 
  

  

  the 
  fenestrules 
  on 
  the 
  non-celluliferous 
  face. 
  

   PERPLEXA, 
  Fenestella 
  — 
  perplexing; 
  at 
  first 
  glance 
  it 
  is 
  difficult 
  to 
  

  

  decide 
  whether 
  this 
  species 
  should 
  be 
  placed 
  in 
  the 
  genus 
  Fenestella 
  

  

  or 
  Unitrypa. 
  

   PERSP1NULA, 
  Fenestella 
  — 
  from 
  the 
  strong 
  conical 
  nodes 
  or 
  spines 
  

  

  of 
  the 
  surface. 
  

   PERTENUIS, 
  Fenestella 
  — 
  from 
  the 
  very 
  slender 
  branches 
  of 
  the 
  

  

  frond. 
  

   PERTENUIS, 
  Paleschara— 
  from 
  the 
  very 
  thin 
  frond. 
  

   PERTEREBRATA, 
  Fenestella 
  — 
  bored 
  through; 
  from 
  the 
  conspicu- 
  

   ous 
  cell 
  apertures. 
  

   PERUNDATA, 
  Polypora 
  — 
  very 
  undulating, 
  from 
  the 
  undulations 
  of 
  

  

  the 
  frond 
  . 
  

   PERUNDULATA, 
  Reteporina 
  — 
  from 
  the 
  undulatory 
  appearances 
  of 
  

  

  the 
  branches. 
  

  

  PINNATA, 
  Ptiloporina 
  — 
  feather-shaped 
  ; 
  from 
  the 
  appearance 
  of 
  the 
  

  

  frond 
  . 
  

   POROSA, 
  Polypora 
  — 
  full 
  of 
  pores; 
  from 
  the 
  numerous 
  cell 
  apertures. 
  

   PORRECTA, 
  Fenestella 
  — 
  stretched 
  out, 
  extended; 
  the 
  cell 
  apertures 
  

  

  extend 
  upon 
  the 
  dissepiments. 
  

   PRECURSOR, 
  Fenestella 
  — 
  a 
  forerunner 
  ; 
  this 
  species 
  is 
  almost 
  a 
  

  

  Unitrypa, 
  a 
  forerunner 
  of 
  that 
  species. 
  

  

  