In his article on the surgery of the hypophysis from the standpoint of the rhinologist, Dr. J. M. West1mentioned the fact that "heretofore rhinologists have been interested in the hypophysis only in a general way." Later on in his article he describes a method by which he resects the septum endonasally, thereby reaching the sphenoid, which he opens widely, and through this opening reaches the hypophysis. Although Dr. West searched the German literature with great care concerning the operative treatment of hypophysis tumors, he neglected those publications which described the endonasal method, which was the most important to him. In March, 1909, I published a new method2of endonasal operation for the removal of hypophyseal tumors. This method is based on Hajek's3radical operation on the sphenoid sinus and is done in several sittings. It is performed in the following way: Operation.— Under cocain anesthesia the