I have found three of these teeth and am wondering what type they are. I am thinking Hammerhead but with serrations it would have to be greater hammerhead. These teeth come from Galveston Island and I believe theme to be Pleistocene. We find several types of Carcharhinus species of teeth on the beach along with lemon, tiger, sand tiger and have seen a couple of great whites that another hunter has found. These teeth are much more robust than the Carcharhinus teeth and the nutrient grove is deep