A specimen of an unusually large single coral, Coelosmilia galeriformis Kner sp., probably the only one of this species ever met with in Sweden, has been collected in the Senonian Mucronata beds at Bjernum, N. Scania. A short review is given of the Senonian Hexacoralla in Sweden, and the new specimen is described and figured, and compared with C. excavata and C. ponderosa, which are also recorded from Sweden. As to the vertical distribution C. excavata ranges through the whole Mucronata series, while C. galeriformis seems to bo restricted to the Lower Maastrichtian, and C. ponderosa has been met with in the topmost Maastrichtian.