remains from the anterior extremity of the original tubular invagination from the abdominal cavity.

Around the fifth month, a ring-like constriction marks the position of the cervix of the uterus, and after the sixth month, the walls of the uterus begin to thicken. For some time, the vagina is represented by a solid rod of epithelial cells. A ring-like outgrowth of this epithelium occurs at the lower end of the uterus and marks the future vaginal fornix. At about