of the Cuzco Valley, Peru. 



11 



Fig. 4. 



Fig. 4. View of floor of the Cuzco Basin from Quispiquilla; San 

 Sebastian is in the right foreground; Cuzco in the middle distance. 



Fig. 5. 



Fig. 5. View of the upper end of Cuzco Basin from a point overlooking 

 the city of Cuzco. The canyon in th'e foreground is cut in a gravel fan, 

 which encloses the Basin on the west. Angostura Narrows seen in the 

 distance terminates the basin on the east. 



