This specimen has 22-23 septae (the radial lines inside the calice or cup).
This specimen shows a slight curvature to near the base of the corallite. This is unusual as most specimens I have found are fairly straight.
There are also 22-23 septae in the calice of this specimen too which tells me they are the same species.
Both specimens were found in the middle Silurian (Sheinwoodian stage) aged rocks of the