What is this? Receptaculites?

[Bronto]

I found this in a field hunting fossil wood. Back in 2006. : Field of view about 10mm. The pinched end of what I had assumed to be some sort of coral. Helena, Texas. The end view is ground smooth & shows 2mm circular whirls. With spiraling partitions. Almost impossible to photograph. I can only see one clearly with 10X. This fossil may be a negative cast? As the crust of the stone spalled. Anyhow- with nothing to compare. I have decided to put money on Receptaculites.......-=James

[Tidgy's Dad]

9 minutes ago, Bronto said:

I found this in a field hunting fossil wood. Back in 2006. : Field of view about 10mm. The pinched end of what I had assumed to be some sort of coral. Helena, Texas. The end view is ground smooth & shows 2mm circular whirls. With spiraling partitions. Almost impossible to photograph. I can only see one clearly with 10X. This fossil may be a negative cast? As the crust of the stone spalled. Anyhow- with nothing to compare. I have decided to put money on Receptaculites.......-=James

I think it's a bryozoan colony. 

[abyssunder]

If I can bet on this, I would go with bryozoan, or maybe with a sponge like Ventriculites .

[Echinoid]

+1 for either bryozoan or coral

[Archie]

I see the impression left by a Fenestellid bryozoan.