1. Sepia officinalis. 13mm section of soft chalky laminae enclosing 20 gas cavities. >100 laminae if 210mm long cuttlebone sectioned diagonally from dorsal-posterior to ventral-anterior. 1.6-18.7 laminae produced per month. Jly 1968. Port Mary, Kircudbright.
2. Sepia officinalis. 13mm section of soft chalky laminae enclosing 20 gas cavities. >100 laminae if 210mm long cuttlebone sectioned diagonally from dorsal-posterior to ventral-anterior. 1.6-18.7 laminae produced per month. Jly 1968. Port Mary, Kircudbright.

Sepia officinalis. 13mm section of soft chalky laminae enclosing 20 gas cavities. >100 laminae if 210mm long cuttlebone sectioned diagonally from dorsal-posterior to ventral-anterior. 1.6-18.7 laminae produced per month. Jly 1968. Port Mary, Kircudbright.