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Cant figure out what's embedded in this rock. Anybody know? The 3rd Pic is of a different rock found in the same area with a similar pattern on it. Found in Riley Co, KS - Flint hills

I've been trying to narrow down the ID for bryozoans I've been finding. I'm not sure if they're weathering out of the Bennett shale or from further up. I have collected about 15 of these over the years and found a nice one several days ago. They are characterized by rounded form with flattish uneven bases. Spacing between monticules is about 1 cm regardless of specimen size. The below example is about 8 cm wide at base and 5 cm tall. I can't find it right now so can only show photos. I'll put a link below to my more recent find. All help appreciated!

Yesterday the weather was unseasonably nice, and I had a little time while traveling through the flint hills of Kansas to do a little fossil hunting with my youngest daughter. I was hoping to get over to hunt in the KC area, but didn't make it that far. (Sorry Bullsnake) We hunted a small exposure of a grey exposure made almost entirely of fossils. Maily millions of tiny fusulinids. I also found a few plates from spiny urchins, crinoid pieces, brachs, and some other stuff. (I'm very poor on my knowledge of the Permian of Kansas.) Anyways here are a few pictures of our hunt. I find the two things at the bottom of the penny to be kind of exciting. I have no idea what they are, but they look cool! Any help on an ID of these things would be appreciated. Ramo (I also added a cool picture of a small T-Rex I came across here the other day hunting my local cretaceous rocks. I had a nice find that day, but an waiting on some further prep to revel what I brought home that day.)