Large numbers have been collected in Wisconsin, and others will probably be found as old sites are more thoroughly explored, and new lands opened to cultivation. The existing examples appear to have been obtained, for the most part, from the village-sites and graves, where they sometimes occur in association with copper beads and other articles of personal adornment. But very few have been recovered from the burial-mounds of the state. A few have also been found in Minnesota, northern Michigan, and Illinois. The finest series of these copper crescents, representing nearly all of the known types, is in the H. P. Hamilton collection. The following is a brief description of the Wisconsin types of copper crescents:— 1. One of the simplest, although uncommon forms, has the upper edge quite straight and the lower ones broadly curved. Specimens have been found in Manitowoc County, and in Houghton County, Michigan. [Illustration: FIG. 622. (S. 2–3.) Mica ornament. Hopewell Group. ] 2. A closely allied type has both edges curved, approaching more nearly the true crescent form. The degree of curvature varies considerably in the small number of specimens known. Specimens have been found in Washington, Sheboygan, Marquette, Crawford, and Barron counties. Minnesota has produced several specimens: one from Monroe County, having both extremities notched to allow for suspension. (Fig. 611.) 3. A third type, the so-called “canoe-shaped” crescent, usually has its lower and upper edges curving equally and formed at the extremities into a short point or embryo prong, directed inward. This is the most frequent Wisconsin type, and examples of it are to be seen in many collections. The largest and finest example now known (10 × 2¼ inches, weight 20 ounces) is in the Hamilton collection, and was found in the city of Oconto, Oconto County. Michigan and Minnesota have also yielded a number of specimens. (See Fig. 611.) 4. A fourth type has the prongs or points at the extremities of greater length and directed upward or inward. Specimens have been found in Calumet, Door, Sheboygan, and Marquette counties. They vary in length from five to seven and one half inches. (One in Fig. 568.) 5. In a fifth type the prolongations, arising from the extremities of the upper edge of the curved base, approach each other and unite to form a central spike, which is usually circular in section and formed by the prolongations being twisted about each other. Specimens have been obtained in Price, Manitowoc, Green Lake, Waukesha, Washington, and Columbia counties. One has been found in Minnesota. (Fig. 614, specimen D.)