Found with bone fragments, ID please on bottom 2

[Whiplash00]

I went back to where I found the bone fragments before and found this. The right piece has some iron oxide on it and there's thin vertical lines if it's possible to see in the photo. Looks like they have a raised to lower repeating pattern on each line. I think it's bone as well. The left looks like a tooth.. Thanks!

 

[Ninjafossils]

They might be bone. But there are definitely no teeth.