Foreign bodies in the biliary tract are of sufficient rarity to make the report of this case—in which a rubber catheter was present in the common duct—of interest. The fact that the lumen of a rubber tube may be obliterated by the deposition of bile salts is a serious objection to the use of rubber tubing in operations for the reconstruction of the biliary passages. REPORT OF CASE The patient, a 37 year old white woman, was admitted to the West Baltimore General Hospital April 10, 1935. She showed symptoms and signs suggestive of appendicitis, and a McBurney appendectomy was done. The gallbladder was said to be normal to palpation. The patient's postoperative course was uneventful, and she was discharged nine days after admission. The patient was readmitted four months later with typical signs and symptoms of acute cholecystitis. At operation a gallbladder containing two stones was removed, and the