We have three specimens found in the grand
mound. Two of them seem to belong to the genus Natica, the other to
Marginella. They have all been cut or ground down on the side of the
opening of the shell, so that two holes permit the passage of a
string, by which the beads thus made are strung together. The fact
that the genera to which the shells belong are found in the sea, as
well as their highly polished surface show these to be marine; and not
only so but from the tropical seas, either we suppose from the Gulf of
Mexico or from the Californian coast.
(_b_.) _Fresh Water Shells_. In all the mounds yet opened, examples of
the Unio, or River Mussel, commonly known as the clam have been found.
They are usually polished, cut into symmetrical shapes, and have holes
bored in them. We have one which was no doubt used as a breast
ornament, and was hung by a string around the neck. In the bottom of a
nearly complete pottery cup, found in the grand mound, which went to
pieces as we took it out, there was lying a polished clam shell. The
clam still abounds on Rainy River. Six miles above the mound, we saw
gathered together by an industrious housewife hundreds of the same
species of clam, whose shells she was in the habit of pulverizing for
the benefit of her poultry.
5. _Pottery_. (_a_.) _Broken_. It seems to be a feature of every mound
that has been opened that fragments of pottery have been unearthed.
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