Geoffroy-Saint-Hilaire presented to the Academie des Sciences in 1830 a child with four legs and feet who was in good health.

Amman saw a girl with a large thigh attached to her nates.

Below the thigh was a single leg made by the fusion of two legs.

No patella was found and the knee was anchylosed.

One of the feet of the supernumerary limb had six toes, while the other, which was merely an outgrowth, had two toes on it.
According to Jules Guerin, the child named Gustav Evrard was born with a thigh ending in two legs and two imperfect feet depending from the left nates.
Tucker describes a baby born in the Sloane Maternity in New York, October 1, 1894, who had a third leg hanging from a bony and fleshy union attached to the dorsal spine.