History.-Since the age of 13 years he has had frequent attacks of pain in the left side, accompanied by irritability of the bladder, and occasionally bv haematuria. Daring the last few months the attacks had recurred almost daily. His urine was acid, and contained an appreciable amount of blood. Skiagrams of the abdomen and pelvis revealed the shadows of three calculi, close together, in the pelvic portion of the right ureter, and a less clearly defined shadow of a calculus in the left ureter.

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... n being closely questioned he now admitted that occasionally he had felt slight discomfort in the right side, but was emphatic that the severe pain had always been in the left side. A diagnosis of bilateral ureteral calculi was arrived at, and the abdomen was explored. The three calculi in the riaht ureter were without difficulty pushed up to a point above the pelvic brim and removed. After closing the wound in the ureter and suturing the peritoneum over it the left ureter was examined, but no stone could be found. The cause of the shadow on the left bide was eventually traced to a calcified mesenteric gland situated in the mesentery. The abdomen was closed without drainage, and aseptic healing resulted. He has had no return of his pain, and has gone back to his work. Morris has called attention to the remarkable fact that occasionally the pain induced by a renal calculus may be referred to the opposite side of the body, and there can be no doubt that this case is an instance of the phenomenon as applied to the ureters.