The membrane was elastic and thin and showed no signs of inflammation.

Menstruation had always been regular up to the time of pregnancy.

The second was a duplicate of the first, excepting that a few bands extended from the cervix to the membranous septum.

In the third the lumen of the vagina, about two inches from the introitus, was distinctly narrowed by a ridge of tissue.

There was uterine displacement and some endocervicitis, but no history of injury or operation and no tendency to contraction.