Through personal visits, wherever possible, and through information from all available sources, an effort was made to locate and learn the character of as many of the old sites as could be traced. In this endeavor I was aided by many whose services are hereby gratefully acknowledged. Especial thanks are due to Captain Cochran with the officers and men of the _Bear_, particularly Boatswain H. Berg; to the Lomen brothers and their esteemed father, at Nome; to Father B. La Fortune and the Reverend Baldwin at Nome; to Mr. Sylvester Chance, superintendent of the northwestern district, Bureau of Education; to Mr. Charles D. Brower, trader at Barrow; to Mr. Jim Allen, trader at Wainwright; and to Dr. E. P. Walker, head of the Biological Survey of Alaska. The list to follow, supplemented by maps, will give in brief the name, location, and description of the remains. The old sites occur, (1) in the form of refuse heaps; (2) as late village sites, smaller or larger areas of ground covered with mostly circular elevations and depressions, with occasionally the wooden remains of igloos or kashims, or only partly ruined dwellings; such remains are the most common; (3) as old village sites in the form of a long irregular ridge mound or of more or less separate heaps; (4) as heaps or "mounds" of individual structures. And as "passed" sites, covered completely by sand or silt and unknown until uncovered through the washing away by the sea or rivers of some of the deposits. In addition there are the remains of burial grounds which are occasionally marked by small low mounds or hummocks produced by decayed burials that have been more or less assimilated by the tundra. Stony beaches with chips, implements, etc., such as are found off old sites on the Yukon, have not been seen in the region now dealt with in any instance. The ruined dwellings and communal houses throughout this region, with a few minor exceptions, were of one general type. They were circular, yurta-shaped, semisubterranean structures, with a more or less subterranean tunnel approach, built of hewn driftwood and earth. These dwellings, when the wood decays and the dome falls in, leave characteristic saucer-and-handle-like depressions. But where such dwellings were close, and especially where they were heaped up or superimposed on older ones, the remains, together with the refuse, may form an irregular elevated ridge or a large irregular mound. On the Diomede Islands the dwellings are built of stone, and ruins of stone houses have been reported to me from inland of the westernmost parts of the Seward Peninsula. Stone dwellings were also known on Norton Sound.