Starting from the left. A headless man with a face on his chest. From a mythical species called Blemmyes.
Next, is the one in the middle. He is a sciapod(monopod) laying on his back. Monopods are humanoid creatures with a single large foot and leg.
Lastly is a cyclops – a one eyed humanoid.
Image source. No known copyright restrictions. Information source Wikipedia – The Free Encyclopedia, licensed under Creative Commons Attribution-ShareAlike License. Read more: Blemmyes(Headless Men); Sciapod(Monopod); Cyclopes.