The external genitalia are well developed. No hymen, nor any remains of one. I have no reason to doubt her virginity. An inch within the introitus vaginæ the finger met a narrowing into which only its tip would pass. Searching to the left another smaller opening was discovered, the two being separated by a strong membrane. Returning to the right or larger passage, was able by careful dilatation for ten or fifteen minutes to insert three-fourths of the length of the index finger and encounter another narrowing, which being patiently overcome, the first joint of the finger found more room and examined uterine cervix and the external os, which is linear antero posteriorly. The neck projects about half an inch into the vagina. The lips are thin, of normal density. Withdrawing the finger and finding the smaller opening, could succeed in penetrating only about an inch. Observed a third, smallest opening in the left vaginal wall, between the ostium vaginæ and the second opening described. [Illustration] The patient would consent to no interference that could possibly cause even temporary disability for daily housework and care of an invalid mother, but agreed to return daily for a few days. After dilating without anæsthesia fifteen to twenty minutes daily for four days, could pass two fingers or a Fergusson speculum one and one-eighth inches into the right passage, and could pass one finger readily, or speculum seven-eighths of an inch in diameter into the left passage. The septum between the two passages is placed antero posteriorly. It is about an eighth of an inch thick, and has the appearance of any other portion of the vaginal wall. It begins an inch within the introitus, and extends to the uterus, making a right and left vagina of normal length. The third, smallest passage, admits a sound and extends upward an inch in the left lateral vaginal wall and ends in a blind extremity. The right vagina discloses an uterine os three-eighths inch in length antero posteriorly, the anterior end of the slit inclined toward the median line. The sound passes readily a distance of one and three-eighths inches, entering in a direction upward and inward half that length, and then turning upward and outward. The sound moves freely in the cavity, and the lining membrane evidently contains folds. Secretion of the cervix free.