 The penis and flagellum are both sharply defined and appear to be without muscular attachments, though bound to the body wall by delicate connective tissue strands.In the neighborhood of the outer opening, however, the penis sheath affords attachment for three or four slender muscle bands that Heath inclined to regard as penis retractors.The hermaphroditic duct, a highly glandular duct of comparatively even diameter, traverses the greater portion of the first coil of the body to enter the accessory glands.