U. S. NATIONAL MUSEUM 



BULLETIN 133 PL. 4 



A Stagnant Estero. or Ancient River Channel, in Chaco, Bordered 

 BY Forest and Covered with Growth of Water Hyacinth; Haunt 

 of Jacanas Jacana JACANA) 



Las Palmas .Chaco ..July 30, 1920 



Mouth of Rio de Oro Where It Debouches into the Rio Paraguay. 

 The Low Wooded Banks Are Typical of the Chaco 



Below Puerto Bermejo, Chaco, August 2, 1920 



