Supernumerary Limbs.--Haller reports several cases of
supernumerary extremities. Plancus speaks of an infant with a
complete third leg, and Dumeril cites a similar instance.
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. The supernumerary leg
was well formed and had a left foot attached to it. Larkin and
Jones mention the removal of a meningocele and a supernumerary
limb from an infant of four months. This limb contained three
fingers only, one of which did not have a bony skeleton.
Pare says that on the day the Venetians and the Genevois made
peace a monster was born in Italy which had four legs of equal
proportions, and besides had two supernumerary arms from the
elbows of the normal limbs.
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