It’s not obvious in the image, but the gooey guy lifting up the cab on the cover of Superman 319 (Jan. 78) is Solomon Grundy, the Earth-1 version.
Pasko, Swan and Chiaramonte begin a multi-part story with a few different plot threads in this issue. There is a lighthouse, the home to a secret government project, L.D.S., but not much is clear about that in this issue.
Lois and Lana are catching up while riding in a cab when Solomon Grundy emerges from the sewers in a rampage. Superman is confused. He left Grundy on the Moon, and this one seems more powerful than the original.
Lana Lang gets footage of the battle between Superman and Grundy, who escaped at the end of it. Morgan Edge is delighted, and Clark even snubs Lois when she tries to set up a lunch date, preferring to sped time with Lana instead. Can’t really blame him.
Grundy comes back into action as the issue ends, keeping Superman busy while the mysterious lighthouse gets attacked by a robotic octopus. And the reader discovers that the Parasite is back, having retrieved his prism, he used it to regenerate Grundy from the swamp waste left in the sewers after his previous encounter with Superman, and is boosting his power levels as well.
The story continues in the next issue.