24 



SMITHSONIAN INSTITUTION 



Fig. i6. — Dr. Moraes assisting with breakfast, early morning camp on 

 Gray's River, Wyoming. The clouds of mosquitoes were almost dense enough 

 to photograph. (Photograph by Resser.) 







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Fig. 17. — Outcrop of algal limestune of horizontal tubular form on Little 

 Birch Creek, west of White Sulphur Springs, Belt Mountains, Montana. 

 (Photograph by Resser.) 



