Geoffroy-Saint-Hilaire mentions several cases, and Martin de
Pedro publishes a description of a case in Madrid in 1879. There
are also on record some cases of triple monster by inclusion
which will be spoken of later. Instances in the lower animals
have been seen, the three-headed sheep of Pare, already spoken
of, being one.
CLASS II.--Double Monsters.--A curious mode of junction, probably
the most interesting, as it admits of longer life in these
monstrosities, is that of a simple cartilaginous band extending
between two absolutely distinct and different individuals. The
band is generally in the sternal region. In 1752 there was
described a remarkable monstrosity which consisted of conjoined
twins, a perfect and an imperfect child, connected at their
ensiform cartilages by a band 4 inches in circumference. The
Hindoo sisters, described by Dr. Andrew Berry, lived to be seven
years old; they stood face to face, with their chests 6 1/2
inches and their pubes 8 1/2 inches apart. Mitchell describes the
full-grown female twins, born at Newport, Ky., called the Newport
twins. The woman who gave birth to them became impregnated, it is
said, immediately after seeing the famous Siamese twins, and the
products of this pregnancy took the conformation of those
celebrated exhibitionists.
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