﻿920 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  Unitrypa. 
  — 
  Forms 
  with 
  prominent 
  carinas 
  which 
  are 
  connected 
  

   by 
  thin 
  oblique 
  plates. 
  

  

  Hemitbypa. 
  — 
  Forms 
  where 
  the 
  carinas 
  are 
  apparently 
  con- 
  

   nected 
  by 
  lateral 
  processes, 
  which 
  are 
  not 
  opposite, 
  but 
  coalesce 
  

   midway 
  between 
  the 
  carinas 
  and 
  form 
  a 
  ridge 
  or 
  pseudo-carina. 
  

  

  Isoteypa. 
  — 
  Forms 
  with 
  prominent 
  carinas 
  connected 
  by 
  distant 
  

   round 
  bars, 
  and 
  with 
  prominent 
  pores 
  on, 
  or 
  near 
  the 
  dissepiments 
  

   of 
  the 
  non-celluliferous 
  face. 
  

  

  Tectulipobella. 
  — 
  Forms 
  of 
  which 
  the 
  carinas 
  and 
  connecting 
  

   processes 
  resemble 
  in 
  a 
  marked 
  degree 
  the 
  non-celluliferous 
  face 
  

   of 
  the 
  frond. 
  The 
  connecting 
  bars 
  do 
  not 
  correspond 
  in 
  number 
  

   to 
  the 
  dissepiments. 
  Eeverse 
  face 
  non-poriferous. 
  

  

  Tectulipoba. 
  — 
  Forms 
  having 
  both 
  branches 
  and 
  dissepiments 
  

   carinated, 
  the 
  carinas 
  much 
  expanded 
  above, 
  coalescing 
  and 
  having 
  

   the 
  appearance 
  of 
  the 
  non-celluliferous 
  face 
  of 
  a 
  frond, 
  apertures 
  

   in 
  continuous 
  rows. 
  

  

  Loculipoea. 
  — 
  Forms 
  having 
  the 
  same 
  manner 
  of 
  growth 
  as 
  the 
  

   preceding, 
  but 
  the 
  cell 
  apertures 
  are 
  arranged 
  in 
  an 
  oval 
  around 
  

   the 
  fenestrules, 
  there 
  being 
  two 
  apertures 
  on 
  each 
  dissepiment. 
  

  

  Phyllopoba. 
  — 
  Forms 
  resembling 
  Fenestella 
  but 
  having 
  aper- 
  

   tures 
  on 
  the 
  dissepiments. 
  

  

  Synocladia. 
  — 
  Forms 
  in 
  which 
  the 
  lateral 
  processes 
  from 
  each 
  

   branch 
  are 
  oblique, 
  forming 
  an 
  angular 
  dissepiment, 
  sometimes 
  

   irregular; 
  three 
  or 
  more 
  ranges 
  of 
  cell 
  apertures, 
  dissepiments 
  

   cellular. 
  

  

  Septopoea. 
  — 
  This 
  form 
  differs 
  from 
  the 
  preceding 
  in 
  having 
  

   only 
  two 
  ranges 
  of 
  cell 
  apertures, 
  which 
  are 
  separated 
  by 
  a 
  

   carina. 
  

  

  IIelicopoea. 
  — 
  A 
  semi-spiral 
  fenestelloid 
  form. 
  

  

  Aechimedes. 
  — 
  A 
  fenestelloid 
  form 
  having 
  a 
  spiral 
  mode 
  of 
  

   growth; 
  two 
  ranges 
  of 
  cell 
  apertures. 
  

  

  Aeohimediopoea. 
  — 
  Similar 
  to 
  the 
  preceding, 
  but 
  having 
  three 
  

   or 
  more 
  ranges 
  of 
  cell 
  apertures. 
  

  

  Lyeopoea. 
  — 
  A 
  flat, 
  expanding 
  form, 
  with 
  thickened 
  margins. 
  

   Three 
  or 
  more 
  ranges 
  of 
  cell 
  apertures. 
  

  

  