U.S. GEOLOGICAL SURVEY. 



MONOGRAPH XXV. PL. XXXV. 



r 



MAI' OK THK SOI'THKRX PORTION OF T.AKK AGASSIZ, SHOWXO ITS EXTENT IN THE 

 l.OWKK BLANCH/VHI) STAGK. 



SfiJe, about h2 iiiilos to aji inch. 



