Sagoths by Spearhafoc

Hollow Earth Cultures: Sagoths from the Pelludidar series by Edgar Rice Burroughs. They're the apish servants of the Mahars.

Warning, some racism ahead.

"Behind them, streaming through the pass which leads into the valley, came a swarm of hairy men—gorilla-like creatures armed with spears and hatchets, and bearing long, oval shields. Like demons they set upon the ape-things, and before them the hyaenodon, which had now regained its senses and its feet, fled howling with fright. Past us swept the pursued and the pursuers, nor did the hairy ones accord us more than a passing glance until the arena had been emptied of its former occupants. Then they returned to us, and one who seemed to have authority among them directed that we be brought with them."
"Our guards, whom I already have described as gorilla-like men, were rather lighter in build than a gorilla, but even so they were indeed mighty creatures. Their arms and legs were proportioned more in conformity with human standards, but their entire bodies were covered with shaggy, brown hair, and their faces were quite as brutal as those of the few stuffed specimens of the gorilla which I had seen in the museums at home.
Their only redeeming feature lay in the development of the head above and back of the ears. In this respect they were not one whit less human than we. They were clothed in a sort of tunic of light cloth which reached to the knees. Beneath this they wore only a loin cloth of the same material, while their feet were shod with thick hide of some mammoth creature of this inner world.
Their arms and necks were encircled by many ornaments of metal—silver predominating—and on their tunics were sewn the heads of tiny reptiles in odd and rather artistic designs. They talked among themselves as they marched along on either side of us, but in a language which I perceived differed from that employed by our fellow prisoners. When they addressed the latter they used what appeared to be a third language, and which I later learned is a mongrel tongue rather analogous to the Pidgin-English of the Chinese coolie."

link

Warlord by 93Cobra

Savage Pellucidar by MaxHierro

A Journey to the Hollow Earth

A Journey to the Hollow Earth by bergamind

Weirding Willows - Where Dwell Monsters part 1 and 2

 The Weirding Willows, by Dave Elliot.

In the spirit of the Wold Newton Family, the League of Extraordinary Gentlemen, and Fables we have this indy comic. Here is Elliot's description:

In the World of WEIRDING WILLOWS Frankenstein's Monster is called DÄMON. This is a name that he has given himself and is the German word for Demon. Damon sincerely believes he is evil and that his creation was of evil intent, even though he does not feel evil.

Yes, he acknowledges he has killed and he knows those volatile emotions are still raging within him, but he is trying to keep himself under control. Much of the source of his rage was from his feelings of being alone.

After the death of Doctor Frankenstein, Damon wandered off into the arctic wastes expecting his life to end. Instead he found a cave that led him down into what he believed was the center of the Earth. This "cave" was actually one of three areas on the Earth where the walls between the dimensions meet and you can cross between the worlds.

Damon crossed over, thinking he was in the center of our world. But it wasn't. It was somewhere else. A world known by other names such as Pellucidar or Hollow Earth. Here amongst the creatures and dinosaurs Damon found a new home and contentment.

Now he has realized there are others who are every bit as different as he is and, at least for now, he has some friends.

In this story we find ALICE in Hollow Earth looking for Damon. Damon splits his time between Hollow Earth and our world for he had made a bond with the creatures there. There are those there he deems friends and cares for very much.

But never in his 100 years in this world did Damon think there was someone else from our world living there as well...

(click images for bigger versions)

There is a hard cover book available for pre-order for Fall of 2013.