NO. I FORMATIONS OF BEAVERFOOT-BRISCO-STANFORD RANGE J 



mountain area of western America from northern Alaska to the 

 Gulf of Mexico. Dr. Kirk will publish the results of his field and 

 office work ; meantime he has given me data for use in this paper. 



I now have in course of preparation an article on the Upper Cam- 

 brian and Ozarkian of western North America, in which a sum- 

 mary of this present paper will be incorporated and the relations of 

 the " Rocky Mountain Trench " area and those to the north of the 

 Bow Valley-Kicking Horse Canyon line more fully presented. At 

 present the larger paper is waiting for the completion of the identifi- 

 cation, description, illustration, and publication of the faunas of the 

 various pre-Devonian formations. 



The brachiopods included in the lists of this paper have been 

 described, illustrated and published." The genera of trilobites are 

 now being prepared for publication, but most of the species are 

 in course of study and illustration and will be published later. 



Acknowledgments. — My indebtedness to Dr. Rudolf Ruedemann 

 and Dr. Edwin Kirk for identification of Ordovician and Silurian 

 fossils is mentioned in the text. Dr. Charles E. Resser has worked 

 early and late on the collections from the Mons formation in con- 

 nection with the study of the fragmentary trilobite remains so that 

 generic names at least might be included in the lists of fossils. 

 Dr. E. M. Kindle, of the Geological Survey of Canada, kindly gave 

 all the information available to him in relation to the collections that 

 had been made from the pre-Silurian formations of the Beaverfoot- 

 Brisco-Stanford Range. 



In all field-work during the past ten years, ]\Irs. Walcott has been 

 an unfailing and most enthusiastic and effective assistant both in 

 running the camp and pack outfit and collecting fossils. We have been 

 greatly indebted to the officials and many employees of the Canadian 

 Pacific Railway for many courtesies that have been of service in 

 expediting and aiding the work. From the Superintendent of the 

 Canadian National Parks, and the local officials and employees of the 

 Rocky Mountains, Yoho, and Kootenay Parks we have received 

 unfailing courtesy and assistance. 



DESCRIPTION OF MAP, PLATE i 



This map represents rather crudely the area from the northern 

 headwaters of the Saskatchewan River southeasterly along the Con- 

 tinental Divide for about 165 miles (265.5 km.). For the purposes of 

 this paper only that portion between the line from Lake Louise, 



^ Smithsonian Misc. Coll., Vol. 67, No. 9, 1924. 



