I got this suggestion from Mark Mckinzie today regarding the circle/dot features in the close-ups. This is probably the outside surface with the teeth underneath. Now I'm very tempted to do some more prep to uncover the rest of this thing. "Those structures in the teeth of the bony jaw/vomerine(?) plate I have seen in other pycnodont and phyllodont jaws at their attachment bases with the jaw. They are probably the nerve canals or blood vessel openings at the “root” of the teeth."