The constricting band was formed by a coalition of the xiphoid cartilages and the umbilical vessels, surrounded by areolar tissue and covered with skin.

Le Beau says that under the Roman reign, A.D.945, two male children were brought from Armenia to Constantinople for exhibition.

They were well formed in every respect and united by their abdomens.

After they had been for some time an object of great curiosity, they were removed by governmental order, being considered a presage of evil.

They returned, however, at the commencement of the reign of Constantine VII, when one of them took sick and died.