8. _Oval form._ This form is of quite as common occurrence as the butterfly form. Nearly all of the specimens are made of plain or banded slate. Specimens have come from Kenosha, Racine, Waukesha, Dodge, Dane, Sheboygan, Fond du Lac, Kewaunee, Brown, Door, Marquette, Winnebago, Waupaca, and Wood counties. Wood, Waupaca, and Door counties mark the northern limit of its distribution. This form also occurs in the adjoining states of Michigan, Illinois, and Iowa. [Illustration: FIG. 343. (S. 1–1.) Winged form of mottled granite. Wisconsin Historical Society; kindness of the _Wisconsin Archeologist_. One can distinguish this form at once as typical of the Wisconsin-Michigan region. ] 9. A related form, of which specimens have been obtained in Racine, Dane, and Sheboygan counties. It also occurs in Iowa. 10. _Double-crescentic form._ An example of this graceful form in the State Historical Museum comes from Dane County. Fragmentary specimens are known from Kenosha and Waupaca counties. All are fashioned from slate. This form also occurs in Illinois and Michigan. 11. _Crescent form._ Specimens have been recovered in Racine, Fond du Lac, and Green Lake counties. Michigan, Iowa, and Indiana have produced specimens. 12. _Knobbed crescent form._ A fine example, in the C. T. Olen collection, comes from Omro, Winnebago County. It is made of banded slate. A fragmentary specimen is reported to have been found at Winneconne in the same county. Illinois and Ontario have produced specimens of this form. 13. _Pick-shaped form._ Specimens have been found in Racine, Washington, Green Lake, and Brown counties. This form also occurs in Michigan. 14. _L-shaped form._ Specimens of this interesting form have been obtained in Dodge, Dane, Waukesha, Ozaukee, Columbia, Sheboygan, Fond du Lac, Marquette, and Manitowoc counties. All are made of slate. _Description of Fig. 344._ +------------------------------+ | | | 1 2 3 | | | | 5 | | 4 6 | | 7 | | | | 8 9 10 | | | | 11 12 13 | | | +------------------------------+ 1. Banded slate, Kentucky. 2. Mottled granite, Trigg County. 3. Banded slate, Meade County. 4. Soft green slate, Madison County.