6. Another peculiar type is furnished with a pair of spikes or prongs, usually rather long, and either flat or cylindrical in section, which arise on either side of the middle of the curved top (or base). (Fig. 613.) Specimens have been obtained in Columbia, Pierce, Washington, and Vernon counties. One has been found in Ottertail County, Minnesota. These specimens range from four to eight inches in length, the prongs being from three to four inches long. A modification of this type has the prongs united at their points by a short cross-bar. (Specimen G in Fig. 614.) _Other Ornaments_ In the Milwaukee Public Museum are two broad, flat strips of native copper which may have been worn as headbands. Both of these fragments, originally curved, have the appearance of having been straightened, by the finders, and may have formed a part of the same band. The larger (six inches by one inch) and the smaller (three and five eighths inches by one inch), and less than one fourth of an inch in thickness, are ornamented along either edge and down the middle with a row of deep indentations. The locality is Sheboygan County. On the skulls of two skeletons in a mound in Crawford County were found thick copper plates. The larger of these was ornamented along two edges with a double row of indentations, and measured eight inches long by four inches wide. The other plate was about four and one half inches square. Mr. Brown has called attention to the distribution of copper and has described these objects so thoroughly that no remarks on my part are necessary. However, I wish to offer, briefly, one or two suggestions. Copper seems to have played an important part in aboriginal life in this country. As the natives possessed neither gold nor silver and because silver ornaments are extremely rare, one may say that silver was not in use; copper appealed to them as being something beyond the ordinary, if not possessing supernatural powers. There was no other substance which they could hammer into shape, or slightly anneal and work more easily. No other malleable material possessed that bright, beautiful color and was capable of such polish. Therefore, copper appealed to the aborigines, and they made general use of it more as an ornament, or a totem, than for ordinary utility; that is, save in the “copper belt,” where it was so common that tools were made of it. [Illustration: FIG. 623. (S. 3–4.) Mica ornaments. Ohio mounds. Collection of W. C. Mills, Columbus, Ohio. ]