A very fine large model (after Zittel) showing the internal structure in vertical median cross section; with a quarter specimen showing a horizontal and a vertical cross section at right angles to the other vertical section. It shows 8 whorls each divided into chambers by numerous single septa. Part of the shell has also been removed to show the structures immediately underneath.
Size: 200 by 100 by 65mm
Size: 200 by 100 by 65mm