A creeping, wet, slithering scent, dripping with seaweed, oceanic plants and dark, unfathomable waters.
Available from Black Phoenix Alchemy Lab, the scent of Chtulhu is $15 for 5 milliliters or $25 for 10 milliliters. Link -via Simply Left Behind
Update 9/18/09 by Alex - The image on this post has been removed. It was a fan-made photoshop rendition without credit to the original artist. I've replaced it with a thumbnail of the original image of H.P. Lovecraft drawn by Bruce Timm, owned by Steven Gettis of Hey Oscar Wilde! blog - Thanks for the heads up, Steven!
I haven't smelled Cthulhu, but I had Miskatonic University which smelled like coffee, leather, and dusty old books. It was heavenly!
Because he's one of the gods,
And not for the Deep Ones,
Who're just one step up from frogs.
http://www.zmangames.com/misc/baby_mythos.htm