THE PAMPEAN PLAIN. BUENA ESPERANZA (SAN LUIS PROVINCE). 



The first chanares. 



Photograph by the Author. 



THE PAMPEAN PLAIN. JUNIN (150 MILES WEST OF BUENOS AIRES, 



330 FEET ELEVATION). 



The clays. A line of dead dunes crosses the Jttnin district, following the course of the Salado. 

 I hey are indicated by light, sandy soil, very different from the clays of the north of 

 Buenos Aires province. Photograph by the Author. 



XVIL To face p. 194. 



