Looking good I agree, you need better jaw line unless you were going for a more snakelike mouth in which case you would need to shorten the snout. Just a quick sketch of a skull in paintshop to give you an idea.
Yeah, thats looking better, though it might still need some loving. If you're going for the viper-esque head, remember how ridiculously wide their jaws are at the back. A good exercise is to take a side-show of your critter and see if you can draw the skeleton in places like the skull where you might be having problems.…