Martian (Peril of the Blue World)

Martians are a sapient species from the planet Mars which launched an expedition to Earth during the Middle Ages.

Biology
Martians have four limbs, plus an additional number of tentacles. Their heads sport two eyes, two ears and a proboscis. They're born from eggs.

Appearances

 * "Peril of the Blue World", by Robert Abernathy (1942)