These are some fossils that I couldn't quite identify while out looking around an area of land in the Nottoway river drainage today. The first appears to be some sort of bone, my guess is a vertebra potentially belonging to a crocodile, though I am very new to this and am quite possibly incorrect in this guess

Next up is a decent sized fragment of a shark tooth that I initially thought to be a young megalodon, but then wasn't quite so sure after noting the presence of what appears to be a slightly weathered cusp on the side of the tooth that is still present, alongside the fact that the tooth appears to have a slight curvature to it
Any insight is well appreciated, thanks!