Possible claw?

[KimberlyNolan12]

Wondering if this is a rock or some type of fossil claw. Found outside Terry, Montana in the badlands. 

[jpc]

more likely a piece of a nautiloid.

[KimberlyNolan12]

Thanks JPC! The area is: 

Name: Lebo Member of Fort Union Formation

Age: Danian (66 - 61.6Ma)

 

So that would be likely, right?

[Mark Kmiecik]

In a claw that linear structure in the first photo would be an indented channel to accommodate a blood vessel and not a raised ridge.