﻿906 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  adjacent 
  carinas 
  When 
  the 
  projections 
  of 
  adjacent 
  carinas 
  occur 
  

   opposite 
  to 
  each 
  other 
  they 
  frequently 
  coalesce, 
  forming 
  a 
  con- 
  

  

  53 
  

  

  53 
  

  

  tinuous- 
  plate 
  uniting 
  the 
  two 
  carinse. 
  The 
  projections 
  occur 
  at 
  

   irregular 
  intervals 
  but 
  always 
  over 
  a 
  dissepiment. 
  

  

  The 
  carinse 
  of 
  Cycloporina 
  rhomboidea 
  differ 
  decidedly 
  from 
  

   54 
  G. 
  hemicyda, 
  anad 
  corres- 
  

  

  pond 
  to 
  groups 
  of 
  Fenestella. 
  

   They 
  are 
  thin, 
  very 
  prominent, 
  

   expanding 
  at 
  about 
  midway 
  

   of 
  their 
  height, 
  then 
  contract- 
  

   ing, 
  the 
  upper 
  portion 
  being 
  

   of 
  the 
  same 
  thickness 
  as 
  the 
  

   lower. 
  On 
  the 
  margin 
  of 
  the 
  expanded 
  portion 
  is 
  a 
  row 
  of 
  nodes 
  

   corresponding 
  in 
  number 
  to 
  the 
  cell 
  apertures 
  and 
  alternating 
  

   with 
  them 
  ; 
  immediately 
  

   below 
  the 
  nodes 
  and 
  alter- 
  

   nating 
  with 
  them 
  is 
  a 
  row 
  

   of 
  small 
  circular 
  pores. 
  

   The 
  sides 
  of 
  the 
  carinas 
  

   have 
  perpendicular 
  grooves 
  

   opposite 
  the 
  cell 
  apertures. 
  

   The 
  semi-circular 
  projections 
  are 
  more 
  numerous 
  than 
  in 
  G. 
  

   hermcycla 
  and 
  the 
  opposite 
  ones 
  are 
  more 
  frequently 
  united 
  ; 
  the 
  

   fronds 
  sometimes 
  presenting 
  a 
  Unitrypa-like 
  appearance. 
  The 
  

  

  