Continuous with the outer edge of the anterior part and curving beneath it was a posterior part, looking not unlike a second foot, containing six well-formed toes situated directly beneath the other five. The eleven toes were all perfect and none of them were webbed.
There is a class of monsters called "Sirens" on account of their resemblance to the fabulous creatures of mythology of that name.
Under the influence of compression exercised in the uterus during the early period of gestation fusion of the inferior extremities is effected. The accompanying illustration shows the appearance of these monsters, which are thought to resemble the enchantresses celebrated by Homer.
Anomalies of the Hand.--Blumenbach speaks of an officer who, having lost his right hand, was subsequently presented by his wife with infants of both sexes showing the same deformity.
Murray cites the instance of a woman of thirty-eight, well developed, healthy, and the mother of normal children, who had a double hand. The left arm was abnormal, the flexion of the elbow imperfect, and the forearm terminated in a double hand with only rudimentary thumbs. In working as a charwoman she leaned on the back of the flexed carpus. The double hand could grasp firmly, though the maximum power was not so great as that of the right hand. Sensation was equally acute in all three of the hands. The middle and ring fingers of the supernumerary hand were webbed as far as the proximal joints, and the movements of this hand were stiff and imperfect. No single finger of the two hands could be extended while the other seven were flexed. Giraldes saw an infant in 1864 with somewhat the same deformity, but in which the disposition of the muscles and tendons permitted the ordinary movements.
Absence of Digits.--Maygrier describes a woman of twenty-four who instead of having a hand on each arm had only one finger, and each foot had but two toes. She was delivered of two female children in 1827 and one in 1829, each having exactly the same deformities. Her mother was perfectly formed, but the father had but one toe on his foot and one finger on his left hand.
Kohler gives photographs of quite a remarkable case of suppression and deformity of the digits of both the fingers and toes.
Figure 123 shows a man who was recently exhibited in Philadelphia. He had but two fingers on each hand and two toes on each foot, and resembles Kohler's case in the anomalous digital conformation.
Figure 124 represents an exhibitionist with congenital suppression of four digits on each hand.
Tubby has seen a boy of three in whom the first, second, and third toes of each foot were suppressed, the great toe and the little toe being so overgrown that they could be opposed. In this family for four generations 15 individuals out of 22 presented this defect of the lower extremity. The patient's brothers and a sister had exactly the same deformity, which has been called "lobster-claw foot."Falla of Jedburgh speaks of an infant who was born without forearms or hands; at the elbow there was a single finger attached by a thin string of tissue. This was the sixth child, and it presented no other deformity. Falla also says that instances of intrauterine digital amputation are occasionally seen.
According to Annandale, supernumerary digits may be classified as follows:--(1) A deficient organ, loosely attached by a narrow pedicle to the hand or foot (or to another digit).
(2) A more or less developed organ, free at its extremity, and articulating with the head or sides of a metacarpal, metatarsal, or phalangeal bone.
(3) A fully developed separate digit.
(4) A digit intimately united along its whole length with another digit, and having either an additional metacarpal or metatarsal bone of its own, or articulating with the head of one which is common to it and another digit.
Superstitions relative to supernumerary fingers have long been prevalent. In the days of the ancient Chaldeans it was for those of royal birth especially that divinations relative to extra digits were cast. Among the ancients we also occasionally see illustrations emblematic of wisdom in an individual with many fingers, or rather double hands, on each arm.
Hutchinson, in his comments on a short-limbed, polydactylous dwarf which was dissected by Ruysch, the celebrated Amsterdam anatomist, writes as follows.--"This quaint figure is copied from Theodore Kerckring's 'Spicilegium Anatomicum,' published in Amsterdam in 1670. The description states that the body was that of an infant found drowned in the river on October 16, 1668. It was dissected by the renowned Ruysch. A detailed description of the skeleton is given.
My reason for now reproducing the plate is that it offers an important item of evidence in reference to the development of short-limbed dwarfs. Although we must not place too much reliance on the accuracy of the draughtsman, since he has figured some superfluous lumbar vertebrae, yet there can be no doubt that the limbs are much too short for the trunk and head. This remark especially applies to the lower limbs and pelvis. These are exactly like those of the Norwich dwarf and of the skeleton in the Heidelberg Museum which I described in a recent number of the 'Archives.' The point of extreme interest in the present case is that this dwarfing of the limbs is associated with polydactylism.
Both the hands have seven digits. The right foot has eight and the left nine. The conditions are not exactly symmetrical, since in some instances a metacarpal or metatarsal bone is wanting; or, to put it otherwise, two are welded together. It will be seen that the upper extremities are so short that the tips of the digits will only just touch the iliac crests.
