Fig. 9From: Siphonal zone structure in the cuttlebone of Sepia officinalis Sepia officinalis. Beach-collected cuttlebone; Vale do Lobo, southern Portugal. Enlarged detail of Fig. 8. Fractured septum showing a criss-cross pattern of lamella–fibrillar nacre; note short rod-like crystalline units of overlapping laminas. Scale bar is 2 µmBack to article page