This is the skull of the Middle Jurassic tyrannosauroid Guanlong, the crested dragon. Or more specifically it’s the skull of the referred specimen, a near complete juvenile animal that’s in nearly as good condition as the adult. One thing it lacks though is the famous crest of the genus. While this could be put down to ontogeny, a look at the skull in dorsal view shows obvious signs of damage and there was most likely some form of crest here originally, though probably rather less well developed than the adult.
Dave Hone's Archosaur Musings 
Aww, it doesn’t enlarge to be hugely high resolution like the rest of your photos. 😦
Please post more pics of poorly described real specimens like this. The mounted casts may look pretty, but are almost worthless scientifically.
It’s a very old photo from the time I had to compress things to get them uploaded on a slow connection.
You’re out of luck really, I only post photos of things that are on display or I’ve got permission to use and I’ve chewed up almost all of my back catalogue. Unless I get to a major collection soon with a generous curator there’s not going to be much coming I’m afraid.