The cover title is "Blue Bolt Weird Tales of Terror". The indicia title is "Blue Bolt", per Frank Motler and confirmed by scan at Digital Comics Museum.
Hugo Monk; Mrs. Monk (Monk's wife); Monk's un-named daughter
Synopsis
Explorer Hugo Monk has the earth open beneath him and he plunges deep into the earth, coming to rest in a hot, oozing quagmire. After several weeks of lying in an unconscious state in a world unknown to mortals, he regains consciousness, having undergone a complete super-natural metamorphosis into a titanic monstrosity!