Flamboyant country music legend Hank Snow, 85, whose million-selling 1950 hit "I'm Movin' On" launched a career that lasted nearly 50 years, Monday, in Nashville, apparently of heart failure . . . and fellow country star Marion Worth, 64, known as "Lady Marion" for her dignified bearing and melodic voice, Sunday, of emphysema, also in Nashville. Her biggest hit was 1960's "That's My Kind of Love."