THE PARANA AT CORRIENTES. 



Banks and islands partially fixed by vegetation. 



Photograph by Widmayer. 



THE BARRANCA AT PARANA CENTRE RIOS), LEFT BANK. 



It is composed of clays and of beds of conchiferous terrestrial limestone, which have supplied 

 the lime-kilns forjnore than a century. Photograph by Boote. 



PLATE XXI. To face p. 244.. 



