Warmaster Chaos Critters

I picked these up out of a bargain bin for a couple of bucks quite a few years ago. They're for Warmaster, so 10mm scale — in 28mm scale they'd be about the size of a pony, I guess.

I have no idea what they're supposed to be; the box just said "Chaos Creatures".

They're squatting on beds of skulls and bones which I haven't painted (yet). If I use them for 28mm gaming, those skulls would have to have come from something pretty tiny — some kind of fairies maybe?