This is an image of probably Haynesina germanica . Is was an empty test found in a deposition zone in Poole Harbour. Each Summer these tests and those of some others like Elphidium Williamsoni are found on the shores of the Harbour.
I have always assumed that the capsules were the primary chambers of a budding adult but I cant find very good images around the net to confirm this can anyone help . Brian Darnton.
The foram is ot cleaned but mounted in Canada Balsam without pressure .