﻿U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  PROCEEDINGS, 
  VOL. 
  44 
  PL. 
  70 
  

  

  EQUUS 
  NIOBRARENSIS. 
  

   For 
  explanation 
  of 
  plate 
  see 
  page 
  594. 
  

  

  