﻿U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  PROCEEDINGS, 
  VOL. 
  67, 
  ART. 
  I 
  PL. 
  5 
  

  

  100 
  '0' 
  

  

  Structural 
  Details 
  of 
  Ploiaria 
  and 
  Gardena 
  

  

  For 
  explanation 
  of 
  plate 
  see 
  page 
  144 
  

  

  145 
  

  

  