NO. 30 



SMITHSONIAN" EXPLORATIONS, [0,12 



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The stratigraphic section was found to contain approximately 

 12,000 feet of Cambrian rocks and 3,000 feet of Ordovician, the 

 transition between the two systems of rocks occurring in Billings 

 Butte (figs. 28, 29), which projects upward beside Hunga Glacier. 

 At the northern base of Munim Teak (figs. 25, 26), above .Mural 

 Glacier a new sub-fauna of the Lower Cambrian was discovered, the 

 fossils being beautifully preserved. 



Fig. 33. — Harry II. Blagden and Sidney S. Walcott preparing 

 ptarmigan skins for shipment to the Smithsonian Institution. 

 Photograph by Walcott, iou. 



Dr. Walcott was accompanied by Mr. Harry 11. Blagden, of the 

 Smithsonian Expedition of 1911, and his son Sidney S. Walcott. 

 The two young men secured a number of fine mammal skins, which 

 have been added to the collections of the National Museum. The 

 collections of the Museum were also enriched by a fine series of 

 fossils from the Burgess Pass quarry, reference to which was made 

 in the report on the expeditions of the Smithsonian Institution of 

 1910 and 191 1 (Smithsonian Miscellaneous Collections, Vol. 59, No. 

 11, pages 39-43). 

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