Fig. 6. 



ar ' 



r" 



Y^^K^f£jjJRL-nL. \ 



^A 



+ * 



Fig. 7. 



Fig. 6 — Irrigated Chili Valley on the outskirts of Arequipa. The lower slopes 

 of El Misti are in the left background. The Alto de los Huesos or Plateau of Bones 

 lies on the farther side of the valley. 



Fig. 7 — Crossing the highest pass (Chuquito) in the Cordillera Vilcapampa, 14,500 

 feet (4,420 m. ). Grazing is here carried on up to the snowline. 



