Bardt speaks of labor twenty-three days after the flow of the waters; and Cobleigh one of seventeen days; Bradley relates the history of a case of rupture of the membranes six weeks before delivery. Rains cites an instance in which gestation continued three months after rupture of the membranes, the labor-pains lasting thirty-six hours. Griffiths speaks of rupture of the amniotic sac at about the sixth month of pregnancy with no untoward interruption of the completion of gestation and with delivery of a living child. There is another observation of an accouchement terminating successfully twenty-three days after the loss of the amniotic fluid. Campbell mentions delivery of a living child twelve days after rupture of the membranes. Chesney relates the history of a double collection of waters. Wood reports a case in which there was expulsion of a bag of waters before the rupture of the membranes. Bailly, Chestnut, Bjering, Cowger, Duncan, and others also record premature rupture of the membranes without interruption of pregnancy. Harris gives an instance of the membranes being expelled from the uterus a few days before delivery at the full term. Chatard, Jr., mentions extrusion of the fetal membranes at the seventh month of pregnancy while the patient was taking a long afternoon walk, their subsequent retraction, and normal labor at term. Thurston tells of a case in which Nature had apparently effected the separation of the placenta without alarming hemorrhage, the ease being one of placenta praevia, terminating favorably by natural processes. Playfair speaks of the detachment of the uterine decidua without the interruption of pregnancy. Guerrant gives a unique example of normal birth at full term in which the placenta was found in the vagina, but not a vestige of the membranes was noticed. The patient had experienced nothing unusual until within three months of expected confinement, since which time there had been a daily loss of water from the uterus. She recovered and was doing her work. There was no possibility that this was a case of retained secundines. Anomalies of the Umbilical Cord.--Absence of the membranes has its counterpart in the deficiency of the umbilical cord, so frequently noticed in old reports. The Ephemerides, Osiander, Stark's Archives, Thiebault, van der Wiel, Chatton, and Schurig all speak of it, and it has been noticed since. Danthez speaks of the development of a fetus in spite of the absence of an umbilical cord. Stute reports an observation of total absence of the umbilical cord, with placental insertion near the cervix of the uterus.