Heh, going to steal straight from Lovecraft:
The thing in the picture squatted or was balanced on what appeared to be a clever reproduction of the monstrously carved throne in the other curious photograph. To describe it with any ordinary vocabulary would be impossible, for nothing even roughly corresponding to it has ever come within the imagination of sane mankind. It represented something meant perhaps to be roughly connected with the vertebrates of this planet--though one could not be too sure of that. Its bulk was cyclopean, for even squatted it towered to almost twice the height of Orabona, who was shown beside it. Looking sharply, one might trace its approximations toward the bodily features of the higher vertebrates.
There was an almost globular torso, with six long, sinuous limbs terminating in crab-like claws. From the upper end a subsidiary globe bulged forth bubble-like; its triangle of three staring, fishy eyes, its foot-long and evidently flexible proboscis, and a distended lateral system analogous to gills, suggesting that it was a head. Most of the body was covered with what at first appeared to be fur, but which on closer examination proved to be a dense growth of dark, slender tentacles or sucking filaments, each tipped with a mouth suggesting the head of an asp. On the head and below the proboscis the tentacles tended to be longer and thicker, marked with spiral stripes--suggesting the traditional serpent-locks of Medusa. To suggest that such a thing could have an expression seems paradoxical; yet Jones felt that that triangle of bulging fish eyes and that obliquely poised proboscis all bespoke a blend of hate, greed and sheer cruelty incomprehensible to mankind because it was mixed with other emotions not of the world or this solar system. Into this bestial abnormality, he reflected, Rogers must have poured at once all his malignant insanity and all his uncanny sculptural genius. The thing was incredible--and yet the photograph proved that it existed.
And further:
"Dog--do you still think I made all my effigies? Why not say preserved? You know by this time the strange places I've been to, and the strange things I've brought back. Coward--you could never face the dimensional shambler whose hide I put on to scare you--the mere sight of it alive, or even the full-fledged thought of it, would kill you instantly with fright! Iä! Iä! It waits hungry for the blood that is the life!"
From 'The Horror in the Museum'
The Auld Grump
