A parry fracture, also referred to as a Monteggia's fracture, is a "fracture of the shaft of the ulna with dislocation of the head of the radius" (Merbs 162).  This is an x-ray of the forearm showing the radius on the left side (thumb side) and the broken bone on the right of the x-ray is the ulna (pinky side).  
Photo courtesy of Pickering and Bachman, p.122