Bone? Ammonite section? Or something else?

[CHalifax 1]

Can anybody identify this fragment I found at Ringstead Bay, Dorset, UK a few years back? I thought originally it was either a piece of bone or ammonite fragment, any advice would be much appreciated. The location is along the Jurassic Coast and would assume it was Jurassic in age.

[CHalifax 1]

[Tidgy's Dad 7,035]

Other angles would be useful. 

It looks like a couple of belemnites fossilized next to each other to me. 

[CHalifax 1]

[CHalifax 1]

It has a slight curve to it.

[CHalifax 1]

[CHalifax 1]

[Tidgy's Dad 7,035]

Hmmmm. 

Lobster claw part ? 

[Al Tahan 546]

Wow that’s tough ...small bone fragment? 

[ynot 6,150]

Just a thought, two burrows side by side.

There are no features to indicate bone or belemnite.

[Manticocerasman 687]

not sure, but I would think they are fossil worm tubes.

[CHalifax 1]

Thank you all for your help! I did wonder if it was work tubes, it has been one of those finds that I was never sure about. Thank you again for your help!