We actually don't know what it is! What do you think?
What we do know is:
This bone artifact is from the Mantle site, a 16th century Late Woodland site, and an ancestral Huron village that dates to A.D. 1500-1530 (approximately 50-80 years before the migration to Huronia). This plough-disturbed site, which was excavated over a period of three years, encompasses an area of 4.2 hectares, has two sets of palisades surrounding a total of at least 70 longhouses. It is estimated that the settlement population was anywhere between 1,500 to 2,000 people.
A total of 1,243 features was excavated and the site yielded over 100,000 artifacts. Artifacts of special interest include ceramic vessel castellation effigies. These castellation effigies, which are unique in Ontario, are Oneida and Onondaga in origin and are related to the mythological "corn-husk" figures. Pipe bowl effigies were also excavated, representing animals such as the woodpecker, the owl and the turtle. The use of small punctates in the decoration of another ceramic pipe effigy may reference tattooing. Other types of excavated artifacts include stone artifacts, pottery, native copper beads and bone artifacts.