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SMITHSONIAN MISCELLANEOUS COLLECTIONS 



vol. 59 



When opportunity offered during the fall and winter, field notes 

 were written up and studies made of the sections obtained during the 

 summer. As the results of these studies two papers were issued 

 in the Smithsonian Miscellaneous Collections, Volume 53 : No. 6, 

 Publication 1934, " Olenellus and other Genera of the Mesonacidae," 

 and No. 7, Publication 1939, " Pre-Cambrian Rocks of the Bow River 

 Valley, Alberta, Canada." Preliminary studies were also made of 

 the unique crustacean fauna found in the Middle Cambrian rocks of 

 Burgess Pass. 



Fig. 46. — Mountain showing folding of Upper Cambrian rocks on northwest 

 side of Amiskwi Pass. Photograph by Walcott. 



In the field season of 1910, the secretary continued the study of the 

 Cambrian strata of the section of the Rocky Mountains adjacent to 

 the main line of the Canadian Pacific Railway, special attention being 

 given to the Stephen formation. The outcrop of this formation was 

 carefully examined for many miles along the mountain sides, with the 

 hope of finding a locality where conditions had been favorable for 

 the preservation of the life of that epoch. The famous trilobite locality 

 on the slope of Mount Stephen above Field had long been known and 

 many species of fossils collected from it, but even there the conditions 



