SMITHSONIAN INSTITUTION 



Fig. i8. — Dr. Bassler entertaining a bear in the Yellowstone Park forest. 

 (Photograph by Resser.) 



Fig. 19. — Vermilion Pass Camp among the tall conifers on the Continental 

 Divide. Mt. Whymper in the background exposes a fine Cambrian section. 

 (Photograph by Resser.) 



