U. S. NATIONAL MUSEUM 



BULLETIN I 17 PL. 2 



Headwaters of the Urubamba River at La Raya Pass. 



Altitude 14,150 IV.et. Puna Zone. Photographed by Cliapman, Juue 30, 1916. 



Occobamba Pass. 



-Vltitiide 13,800 feel . I'nna Zone. Photographed by Heller. 



