ALIENS AND SO FORTH ROUND-UP 006

Martians aplenty, plus more! 

Martians: 

Time traveller Scott Rand and his companions stumble into a Martian invasion of Earth during a jaunt to the far-distant future world of 2000 CE, and they immediately get in on the planet-defending action. Featuring a Viking vs Martian battle, for all those fans of classic 2010s mashup humour.

These particular Martians aren't anything special, but I must say that I appreciate their minimalist, doorstop-shaped spacecraft. (Top-Notch Comics 002, 1940)

Martians: 

Scott Rand soon makes his way to Mars proper, where he encounters this very human-looking Martian wearing an outfit that is as jam-packed with retro-futuristic fashion elements as it is possible to be. His particular style of Martians just so happened to have been under attack by the reason for Rand's trip to Mars... (Top-Notch Comics 003, 1940) 

Martians: 

... Kruzzo, the Ice King of Mars, aka the "Master Pirate of Time," leader of this considerably more goblinoid type of Martian, who he leads on raids from their hidden city at the Martian South Pole. Kruzzo has captured 2/3 of Rand's companions, and has messed with the wrong time traveller and the wrong Viking and the wrong scientist and the wrong Ancient Egyptian princess this time, because their entire city ends up getting blown to kingdom come.

I was initially going to lump these guys and the previous ones together, but there are some obvious phenotypical differences between the two groups. Are they and the Martians who tried to invade Earth all different subtypes of the same species, Basil Wolverton style or did three groups of Martian hominid all make the leap to full sentience around the same time? (Top-Notch Comics 003, 1940)

Arurans: 

Bob Steele's whole thing is that he's got a spaceship and he's ready to head to another planet at a moment's notice, to meet alien intelligences and either befriend or befoe them. Despite the chilly reception depicted above, Bob ultimately befriends the Arurans of planet Arura, a civilization with many enemies but no meaningful physiological distinction from any other bunch of white guys. (Funny Picture Stories v1 007, 1937)