PROSPECTUS SUPPLEMENT (TO PROPECTUS DATED MARCH 24, 1999) EQUITY RESIDENTIAL PROPERTIES TRUST 1,262,264 SHARES All references in the Prospectus dated March 24, 1999, to the term "selling shareholder" are hereby deemed to include all transferees, assignees, distributees or pledgees of any person identified therein as a selling shareholder. __________________________________ The date of this prospectus supplement is August 30, 1999