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.