﻿1100 
  JBORTT-SEVENTH 
  REPORT 
  ON 
  THE 
  STATE 
  MUSEUM. 
  

  

  conclusion 
  that 
  they 
  are 
  of 
  brachiopodous 
  nature, 
  the 
  normal 
  

   brachiopod 
  characters 
  being 
  somewhat 
  obscured 
  by 
  their 
  mode 
  

   of 
  growth. 
  From 
  the 
  accompanying 
  figures, 
  taken 
  from 
  

   Waag-en's 
  illustration 
  of 
  the 
  genus, 
  it 
  appears 
  that 
  the 
  valves 
  

   when 
  well 
  preserved 
  show 
  a 
  distinct 
  hinge-line, 
  faint 
  articulating 
  

   processes 
  and 
  muscular 
  impressions, 
  all 
  more 
  similar 
  to 
  the 
  cor- 
  

   responding 
  structure 
  in 
  the 
  brachiopods 
  than 
  to 
  anything 
  occur- 
  

   ring 
  among 
  the 
  corals 
  or 
  Rudista. 
  If 
  this 
  evidence 
  of 
  the 
  

   brachiopodous 
  nature 
  of 
  these 
  fossils 
  prove 
  convincing, 
  the 
  

   remarkable 
  development 
  of 
  the 
  cellular 
  testaceous 
  tissue 
  of 
  the 
  

   pedicle-valve, 
  which 
  produces 
  the 
  striking 
  external 
  resemblance 
  

   to 
  a 
  coral, 
  is 
  certainly 
  a 
  no 
  more 
  extreme 
  deviation 
  from 
  the 
  

   brachiopod-type 
  than 
  are 
  such 
  bodies 
  as 
  Hippurites, 
  Caprotina, 
  

   Radiolites, 
  etc., 
  from 
  the 
  type 
  of 
  lamellibranchiate 
  structure. 
  

   The 
  shells 
  were 
  evidently 
  attached 
  by 
  solid 
  fixation 
  at 
  the 
  apex 
  

   of 
  the 
  pedicle- 
  valve, 
  and 
  this 
  attachment 
  strengthened 
  by 
  the 
  

   epithecal 
  rootlets 
  extending 
  downward 
  from 
  the 
  walls 
  of 
  the 
  

   valve, 
  similar 
  to 
  those 
  in 
  Omphtma 
  and 
  other 
  corals. 
  

  

  Type, 
  Riohthofenia 
  Sinensis, 
  Kayser. 
  

  

  Distribution. 
  Carboniferous. 
  

  

  158 
  

  

  