The commonest part of a belemnite to be preserved is the guard (shell) which is composed of solid, radiating needles of calcite. Away from the pointed end, the shell contains a V-shaped hollow in which sat the phragmocone, a chambered shell filled with gas to help the animal float. This is only occasionally preserved – look closely and you’ll see that the second from bottom specimen contains one. The phragmacone is more commonly missing and the end of the shell is filled with mud or crushed flat, which the other specimens illustrate.
These belemnites bear a strong resemblance to Passaloteuthis apicurvata.
Find out more on the molluscs page.