|The information in this article comes from League of Extraordinary Gentlemen and is not written by Edgar Rice Burroughs.|
The Molluscs are strange creatures, they have a large head and a great many tentacles. It is noted that one of their building materials is a black resin they secrete themselves!
The Molluscs are an adapted version of H.G. Wells martian invaders. The Molluscs are one of three examples of the invaders being adapted into an unofficial crossover with Edgar Rice Burroughs martian tales, the others being in the book The Alternate Martians, and in the short story Mars: The Home Front under the name Sarmak.