U. S. NATIOrJAL MUSEUM 



BULLETIN I 17 PL. 9 



Chauillay Bridge Over the Urubamba River. 



.Vlliludc 3,71)0 fpfl . Arid Tro|ii( ;il Zoiif . riiolos^raplu'il by Chapiuaii. .July 9, 1916. 



Santa Ana Valley, Lower Urubamba Valley. 



.UIiliuica,.")0(lf('cl,. .\ri(l Tropical Zone. I'holograiihcd liy Cliaiiiimi), .)r., .Inly l(i, 191(i. 



