A friend and I collected on a creek that we hadn't visited since last Fall earlier this week. The water was a little high and murky but we lucked-out on a couple of rare finds, at least for us. The sediments are Upper Cretaceous (Maastrichtian), Selma Group, Ripley Formation. The first photo is a fish skull, as found, no preparation. Guessing that it is an Enchodus sp. skull. The other photos are what I'm guessing to be a large dermal denticle (thorn) from a ray. It is more than an inch tall (26 mm), 35 mm on the long slant, 26 mm on the short slant, and has a concave base. Thanks for looking.