﻿U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  PROCEEDINGS, 
  VOL. 
  67, 
  ART. 
  I 
  PL. 
  9 
  

  

  211 
  

  

  214 
  

  

  Structural 
  Details 
  of 
  Ghilianella 
  

  

  For 
  explanation 
  of 
  plate 
  see 
  page 
  152 
  

  

  04903—25 
  11 
  

  

  153 
  

  

  o 
  

  

  