1. Sepia officinalis. Cuttlebone, below conchiolin (3) a layer (20mm) of over 100 soft chalky laminae (1) enclosing gas filled cavities. Floats when separated from body. 2: beak marks of sea birds. July 1968. Strandline, Port Mary, Kircudbright.
2. Sepia officinalis. Cuttlebone, below conchiolin (3) a layer (20mm) of over 100 soft chalky laminae (1) enclosing gas filled cavities. Floats when separated from body. 2: beak marks of sea birds. July 1968. Strandline, Port Mary, Kircudbright.

Sepia officinalis. Cuttlebone, below conchiolin (3) a layer (20mm) of over 100 soft chalky laminae (1) enclosing gas filled cavities. Floats when separated from body. 2: beak marks of sea birds. July 1968. Strandline, Port Mary, Kircudbright.