The superficial veins of the neck and of the subclavicular fossa. Upon the left side the greater portion of the sternocleidomastoideus has been removed, the clavicular portion of the pectoralis major incised, and the mylohyoid and anterior belly of the digastric divided. * = Communication between the external jugular and common facial veins. ** = Occipital root of external jugular vein. + = Perforating branches of the internal mammary vessels.