Upon the death of a member prior to retirement who was a member continuously for not less than 18 months immediately prior to his death survived by a widow or widower with whom he was living at the time of his death, the retirement system shall pay to such widow or widower in addition to all other payments due, if any, to such widow or widower a lump sum supplemental survivorship benefit of two hundred fifty-five dollars ($255). If such member is not survived by such a widow or widower, the retirement system shall apply such lump sum supplemental survivorship benefit to reimburse the person who paid the funeral expenses of such member to an amount not to exceed two hundred
fifty-five dollars ($255).