ILLUSTRATIONS 



PLATE 



i. THE FALLS OF THE YGUASsu . . . Frontispiece 



FACING PAGS 



II. THE ARID ANDES 



PUNTA VACAS, ON THE TRANS-ANDEAN 



RAILWAY . . . , , , , , 2% 



QUEBRADA DE IRUYA 2% 



III. THE PATAGONIAN ANDES , , 38 



IV. VEGETATION OF THE INTERIOR VALLEYS (ANDES 



, OF THE NORTH-WEST) 48 



FOREST ON THE OUTER SLOPE OF THE SUB- ANDEAN 



CHAINS , ... 48 



V. DRY SCRUB OF THE CENTRAL CHACO . . . 58 

 MARSHES (ESTEROS OR CAN*ADAS) OF THE EAST- 

 ERN CHACO 58 



VI. THE VALLE OF SANTA MARIA, NORTH-WEST OF 



MOUNT ACONCAGUA 70 



THE OASIS OF ANDALGALA .... 70 



VII. THE OASIS DEL RINCON, BELOW SAUJIL (ANDAL- 

 GALA LINE, PROVINCE OF CATAMARCA) . . 82 



THE MONTE AT EL YESO 82 



VIII. A VINEYARD AT SAN JUAN Q2 



A VINEYARD AT MENDOZA . . . . . Q2 



IX. THE LAND OF THE BANADOS .... IOO 



LORETO ! FARMING BY INUNDATION . . . IOO 



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