[MineralMan]

I see no nostrils on the upper mandible at all, and it looks complete. I'd like to see that skull stripped of all the skin, etc.

[Publius]

We're both looking for the blowhole.

[Bloody Sam Roberts]

I see no nostrils on the upper mandible at all, and it looks complete.

You can see some canals in the upper part next to the tooth line that look to be nostrils.
My guess is that it was a sea-going creature, if not, amphibious.