﻿U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  PROCEEDINGS, 
  VOL. 
  98 
  PLATE 
  1 
  

  

  1a 
  

  

  ie- 
  

  

  

  

  

  -A. 
  

  

  -■■1, 
  

  

  (For 
  explanation 
  see 
  page 
  48.) 
  

  

  