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. Perhaps the best known of all double monsters were the Siamese twins. They were exhibited all over the globe and had the additional benefit and advertisement of a much mooted discussion as to the advisability of their severance, in which opinions of the leading medical men of all nations were advanced. The literature on these famous brothers is simply stupendous. The amount of material in the Surgeon General's library at Washington would surprise an investigator. A curious volume in this library is a book containing clippings, advertisements, and divers portraits of the twins. It will be impossible to speak at all fully on this subject, but a short history and running review of their lives will be given: Eng and Chang were born in Siam about May, 1811. Their father was of Chinese extraction and had gone to Siam and there married a woman whose father was also a Chinaman. Hence, for the most part, they were of Chinese blood, which probably accounted for their dark color and Chinese features. Their mother was about thirty-five years old at the time of their birth and had borne 4 female children prior to Chang and Eng. She afterward had twins several times, having eventually 14 children in all. She gave no history of special significance of the pregnancy, although she averred that the head of one and the feet of the other were born at the same time. The twins were both feeble at birth, and Eng continued delicate, while Chang thrived. It was only with difficulty that their lives were saved, as Chowpahyi, the reigning king, had a superstition that such freaks of nature always presaged evil to the country. They were really discovered by Robert Hunter, a British merchant at Bangkok, who in 1824 saw them boating and stripped to the waist. He prevailed on the parents and King Chowpahyi to allow them to go away for exhibition. They were first taken out of the country by a certain Captain Coffin. The first scientific description of them was given by Professor J. C. Warren, who