42 



SMITHSONIAN INSTITUTION 



: 

 sip .-:■ 











-da. . . 



Fig. 35. — Fossil horse quarry, from the opposite side of canyon. (Photograph 



by N. H. Boss.) 



~*k 



* 



>j 



Fig. 36. — Starting the stripping above the bone layer. (Photograph by 



N. H. Boss.) 



