Fig. 10From: Siphonal zone structure in the cuttlebone of Sepia officinalis Spirula. Beach-collected shell; Sydney, Ausralia. Lamella–fibrillar nacre of a septum. Fractured septum showing a criss-cross pattern indicative of lamella–fibrillar nacre; note closely spaced parallel fibres in two fractured overlapping laminas. Scale bar is 2 µmBack to article page