A kind of fossil coral collected by Elizabeth Gray.
From: Nicholson, H. A. and Etheridge, R. A monograph of the Silurian fossils of the Girvan District in Ayrshire with special reference to those contained in the “Gray collection”.
Vol. 1, part 3 1878-1880. Described on p.261 and depicted on plate 16. (image from biodiversitylibrary.org)