Fig. 1
From: Siphonal zone structure in the cuttlebone of Sepia officinalis
Sepia officinalis. Beach-collected cuttlebone; Vale do Lobo, southern Portugal. Ventral side of cuttlebone showing solid connecting stripes in periphery of siphonal zone and pillar structures in chambers seen where connecting stripes are broken. Scale bar is 2 mm. cr contacting ridge, cs connecting stripe, pi pillar structure