The above paper was presented to the American Gynæcological Society at its first annual meeting (New York, 15th Sept. 1876), and by unanimous vote of the council, Drs Fordyce Barker, Marion Sims, and Munde of New York, Byford of Chicago, Atlee and Goodell of Philadelphia, Parvin of Indianapolis, and Lyman and Chadwick of Boston, received the thanks of the Society, as communicated by the secretary, Dr Chadwick. By the kindness of the Society the writer has been permitted to decide where the paper shall be published.