Oldhamia

Oldhamia, a genus of fossils of unknown affinities met with in the Cambrian system. Oldhamia assumes various forms, sometimes consisting of short radiating branches or umbels, which spring at regular intervals from a central thread-like axis; at other times the branches radiate in all directions from a central point. Some palæontologists have supposed the fossil to be a Serularian zoophyte; others have referred it to the polyzoa; while yet others think it may be a seaweed. Possibly it is not a fossil at all, but merely an inorganic structure.