U. S. GEOLOGICAL SURVEY 



MONOGRAPH 55 PLATE V 



A. TYPICAL "LYSITE" LOCALITY, AT COTTONWOOD DRAW, NORTH OF LOST CABIN, WIND RIVER BASIN, WYO. 



Shows the Heptodon-Coryphodon-Eohippus zone (level Wind River A), with Paleojoic hills in the background. (After Granger, 



1910.1.) Am. Mus. negative 18393 



B. TYPICAL "GRAY BULL" LOCALITY, 4 MILES SOUTH OF OTTO, BIG HORN BASIN, WYO. 



Shows the Syilemodon-Coryphodon-Eohippus sone flevcl Big Horn C), with the excavation of the skeleton of Eohippus osboi 



in the foreground. Am. Mus. negative 18450 



EXPOSURES OF WASATCH FORMATION AND TYPICAL WIND RIVER DEPOSITS IN WYOMING 



