﻿PLATE 
  XX. 
  

  

  Roots 
  Of 
  EUCALYPTOCRINUS. 
  

   Page 
  iU. 
  

   The 
  specimen, 
  which 
  preserves 
  the 
  base 
  of 
  the 
  column, 
  shows 
  the 
  ramification 
  

  

  of 
  the 
  rootlets 
  through 
  the 
  calcareous 
  shale, 
  and 
  was 
  evidently 
  imbedded 
  dur- 
  

   ing 
  its 
  growth 
  upon 
  the 
  ocean 
  bed. 
  

  

  Specimens 
  sometimes 
  occur 
  with 
  rootlets 
  much 
  more 
  extended, 
  and 
  becoming 
  

   quite 
  filiform, 
  but 
  seldom 
  traceable 
  to 
  their 
  entire 
  extent 
  

  

  