1. BELEMNITES:

2. COLEOIDEA:
These include squid, cuttlefish and octopuses plus various extinct groups most importantly the belemnites.
Draw a typical belemnite with soft parts (Page 94 Fig. 60 a).
It is a cephalopod but with an internal rather than exoskeleton.

3. BELEMNITES: The shell usually has three parts:
The guard: Bullet shaped cylinder of calcite.
Phragmacone: Conical thin walled structure in front of the guard.
Has a slender siphuncle and tiny protoconch.
Pro-ostracum: Long flat tongue pointing forwards.
Appears to be a kind of fossilised squid.
Mode of life similar to ammonites.