micro bone and claw?

[hndmarshall]

found in gravel from Brazos river here in west Houston

it appears to be a very tiny claw but will let the more experienced determine

also there is what appears to be a small bone also took a pic of it with micro scope camera.

I guess another possibility could be a tiny tooth?

[minnbuckeye]

Good eye for seeing that!!

[jpc]

Is it a claw or a shell(?) in cross section?