Pyramidellid sp. (protoconch)

Fossil mollusc, Pyramidellid sp (protoconch) (gastropod); two different types of protoconchs. borehole from the Quaternary (Pleistocene, Early Pleistocene) deposits, Icenian Crag, of the Royal Society Borehole, Ludham, Norfolk, England examined by Dr Peter E.P. Norton, 1961