During dissection of the abdomen the descending coton was found to be displaced medially with a persistent mesocolon still present. In the lateral recess created by this abnormal position were found coils of ileum and jejunum. The ascending colon although not displaced also contained a persistent mesocolon, although somewhat shorter in length. Throughout its length the descending colon was only 2.5 cm. in width, however, upon pathological examination was found to be normal.