Hello all!
Well, I finally hammered into the matrix that @joshuajbelanger sent me as part of my recent "rolling auction" win. The two chunks that were easier to separate didn't yield much - a couple of small shark teeth and a ray tooth plate (I did save the leftover material so I can look through it again just in case I missed something), but the harder, white chunk gave up quite a few invertebrates! Here are a few pictures:
Picture #1: The circular object reminds me of