Check my earlier posting in the Macro/Close-up forum to see what this object actually looks like and to find out more about its owner.
This is a close up on the ornate corrugation on the surface of the tooth. It is generally believed that these wrinkles helped improve the grip on its heavily armoured prey. The white/cream coloured material is what remains of the original rock matrix after (incomplete) preparation of the specimen.
The image measures approx. 5.5mm X 4mm.
Bruce

Note: This was a really tough one to reduce below the forum standard of 200Kb as the original 800X600 was 510Kb ex Photoshop. I used XAT to remove all EXIF data and selectively paint in the areas of high and low JPG compaction.
B