Marilyn Arnstein Zax, 92,  of Connecticut, formerly of Dorchester and Nantucket Beach, Mass and Miami Beach, Fla, has died. She was the wife of Albert Zax. Born in Boston, Mass ,and raised in Dorchester, she was the daughter of the late Sophie Davis Arnstein and Adolph Leopold Arnstein. She was also predeceased by her brother Paul Arnstein and his wife Ruth Arnstein and her niece Judy Arnstein. She is survived by her daughters, Shoshana Weiser (John) and Rachel Dibner (Mark); and her grandchildren Sam and Ariel Weiser, Sage and Skye Dibner.