1 
B.S. 22172. ilud flats exposed 
at low tide at mouth of R£o Ajo. I 
Lavalle , Buenos Aires, Argentina. 
November 15, 1920. 
1424. Mouth of Rio Ajo, below 
Lavalle, Buenos Aires, Argentina. 
November 15, 1920. 
B.B. 22173. Alkaline flats 
at mouth of ^io Ajo. Lavalle, 
Buenos Aires, Argentina. 
November 15, 1920. 
