Scrooge and Donald pursue the McDuck millions underwater in Carl Barks’ epic “Hall of the Mermaid Queen.” In Terry (Edge City) LaBan’s “It Must Be Magic,” the Beagle Boys battle a rich prestidigitator. Gyro Gearloose launches his “Space Food Folly” in a rare Tony Strobl tale making its American debut. Finally, “Everything’s Coming Up Rubies” in a Flintheart Glomgold adventure by English duck man Paul Halas.