﻿U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  PROCEEDINGS, 
  VOL. 
  67, 
  ART. 
  18 
  PL. 
  I 
  

  

  

  3a 
  

  

  

  4b 
  

  

  4c 
  

  

  

  11 
  

  

  

  4 
  ^J&K^ 
  

  

  Apiocrinus 
  and 
  Other 
  Crinoid 
  Genera 
  

  

  For 
  explanation 
  of 
  plate 
  see 
  page 
  6 
  

  

  