﻿NO. II SMITHSONIAN EXPEDITIONS, I9IO-I9I I 39 



seal-island patrol. Therefore other arrangements were made for 

 transportation during the remainder of the season. Mr. Wetmore 

 went to Unalaska to work in that vicinity for a while and to secure 

 passage homeward along the south side of the Alaska Peninsula. The 

 results of his work, however, belong to the Biological Survey The 

 remainder of the party secured passage to Nome on the gasolene 

 schooner Polar Bear, owned and commanded by Mr. Louis L. Lane, 

 of Seattle. They sailed from Unalaska on July 3, and reached Nome 

 July 11, having spent one day on Bogoslof Volcano, half a day on St. 

 Paul Island, half a day at Walrus and a day at St. Matthew and Hall 

 islands. 



No thorough work could be done on such a hurried trip, but a fairly 

 good impression was obtained of the avifauna of these interesting 

 islands and a large series of photographs taken. 



Although the Murre colonies at Bogoslof Island were the most 

 extensive seen and probably included the greatest number of birds, 

 they were totally eclipsed in density by the wonderful colonies on 

 Walrus Island. This is a most remarkable little island, an ornitho- 

 logical wonderland, where ten species of seabirds breed in countless 

 multitudes. The California Murres rank first in number, literally 

 covering the low cliffs and rocky shores all around the island, as 

 well as large spaces on top of it, with dense masses of birds sitting 

 close together. 



STUDIES IN CAMBRIAN GEOLOGY AND PALEONTOLOGY IN THE 

 CANADIAN ROCKIES 



During the field season in 1909, Dr. Charles D. Walcott, Secretary 

 of the Smithsonian Institution, continued his investigations in the 

 geology of the Cambrian and pre-Cambrian rocks of the Bow River 

 Valley, Alberta, Canada, and on the west side of the Continental 

 Divide north of the Canadian Pacific Railway in British Columbia. 



The first camp was made on the shores of Lake Louise, soutrrwest 

 of Laggan. From this point work was carried forward on the high 

 mountains east, northeast, and southwest of the lake, and side trips 

 were made to the Valley of the Ten Peaks and across the Bow Valley 

 in the vicinity of Ptarmigan Lake. Many fine photographs were 

 secured, both of the beautiful scenery and of the geological sections 

 which are wonderfully well shown above timber line on the higher 

 ridges and peaks. 



The measurements of the Cambrian section were carried down to 

 a massive conglomerate which forms the base of the Cambrian 



