Golden Age Comic Book Stories has a small gallery of scans from science fiction illustrator Edd Cartier's 1951 "Travelers of Space."
Cartier's bug-eyed monsters are second to none. As Bruce Sterling notes, "with vampires, werewolves and zombies absolutely littering the pop-culture landscape, you have to wonder why these sweet little guys haven't made a major comeback."
Travelers of Space, Published by Gnome Press ~ 1951
(via Beyond the Beyond)