It was a gigantic, pale-grey worm or centipede, as large around as a man and twice as long, with a disk-like, apparently eyeless, cillia-fringed head bearing a purple central orifice. It glided on its rear pairs of legs, with its fore part raised vertically – the legs, or at least two pairs of them, serving as arms. Along its spinal ridge was a curious purple comb, and a fan-shaped tail of some grey membrane ended its grotesque bulk. There was a ring of flexible grey spikes around its neck, and from the twisting of these came clicking, twanging sounds in measured, deliberate rhythms. – H.P. Lovecraft, A. Merritt, Robert E. Howard, C.L. Moore and Frank Belknap Long.
First encountered during the events of Case 007 – The Eyes Of A Stranger.