NO. 3 SMITHSONIAN EXPLORATIONS, IQI5 39 
From the second ridge on upward the heretofore rather sluggish river 
current quickened perceptibly and quite suddenly. Again pebbles and small 
fossil remains appeared on the bars, formerly composed only of very fine 
alluvial matter. 
All these three places yielded a moderate amount of fossils. These remains 
are now all in the possession of the United States National Museum. 
At midnight, on July 1, we returned to Nizhni Kolymsk, and five days later 
our schooner left on the return trip. I reached Nome on September 17, and 
Seattle on October 9. 
setween Cape Big Baranoff and Chaun Bay a few more fossils were added 
to the collection. Some of them were found on the base of the elevated tundra 
silts facing the ocean, on many places between mountain ridges. The eleva- 
tions of this tundra beach differ greatly according to locality. The surface of 
Fic. 52—Tundra beach near Chaun Bay. This picture shows detail of central 
part of figure 51, which compare. Fossils found here. 
the frozen tundra was in August, 1915, overgrown with luxuriant Arctic 
grasses and herbs. The driftwood found along the beach comes from distant 
localities and has been brought down by the large rivers of the north. In 
many instances it is even undoubtedly of American origin. 
Some of these fossils—among them a fairly complete mammoth skull— 
were found in little cross gulches dug by small water courses. 
Mr. J. W. Gidley, in charge of fossil mammals in the National 
Museum, reports that the collection of bones sent in by the Siberian 
expedition contains a few fine specimens together with a considerable 
number of isolated bones which are valuable for study and com- 
parison. They all indicate a late Pleistocene age, as the bones of 
many of the forms represented can with difficulty be distinguished 
from those of species still living in that region. 
