Below is a picture from the historical buildings preservation document for the Fleur-de-Lys Studios (which features in “The Call of Cthulhu”). Note the semi-tentacular nature of the tails in the mural design placed above the fire-place in the Fleur-de-Lys Studios interior…

fleur-providence

dragonserpent

One wonders if Lovecraft could have seen it on a tour of the interior?

It might be interesting to know the mythological derivation and symbolism in use here? It appears to be blending of a gryphon or Welsh red dragon (also to be seen on the exterior) with a sea-serpent? And with a human eye shape made by the combination of both tails.