On each foot there was a double halux and five other digits, some of which were webbed.
The influence of heredity on this anomaly is well demonstrated.
Reaumur was one of the first to prove this, as shown by the Kelleia family of Malta, and there have been many corroboratory instances reported; it is shown to last for three, four, and even five generations; intermarriage with normal persons finally eradicates it.
It is particularly in places where consanguineous marriages are prevalent that supernumerary digits persist in a family.

The family of Foldi in the tribe of Hyabites living in Arabia are very numerous and confine their marriages to their tribe.

They all have 24 digits, and infants born with the normal number are sacrificed as being the offspring of adultery.

The inhabitants of the village of Eycaux in France, at the end of the last century, had nearly all supernumerary digits either on the hands or feet.

Being isolated in an inaccessible and mountainous region, they had for many years intermarried and thus perpetuated the anomaly.