Peoples of Mercury:
Beaked Men (Planet Comics 004, 1940)
Cave-Dwellers (Wow Comics 003, 1941)
Crab Men (Planet Comics 008, 1940)
Eastern Hemisphere Mercurians (Planet Comics 006, 1940)
Fernomacs (Planet Comics 009, 1940)
Flower Mercurians (Planet Comics 006, 1940)
Giant Mercurians (Jungle Comics 010, 1940)
Grubmen (Planet Comics 009, 1940)
Heidites (Fantastic Comics 005, 1940)
Insect-Men (Fantastic Comics 007, 1940)
Mercurian Cave-People (Exciting Comics 002, 1940)
Mercurians (Amazing Mystery Funnies v3 003, 1940)
Mercurians (Jumbo Comics 019, 1940)
Mercurians (Mystery Men Comics 019, 1940)
Mercurians (Planet Comics 003, 1940)
Mercurians (Planet Comics 007, 1940)
Mercurians (Speed Comics 010, 1940)
Mercurians (Target Comics v1 006, 1940)
Mercurians (Two Kinds) (Wow Comics 002, 1941)
Mercurians of Thian (Exciting Comics 002, 1940)
Mole-Men (Amazing Mystery Funnies v3 003, 1940)
Serviles (Fantastic Comics 005, 1940)
Surface Mercurians (Jungle Comics 010, 1940)
Western Hemisphere Mercurians (Planet Comics 006, 1940)