Figure 3. Fragment of a recent specimen of Phalium undulatum (Gastropoda), embedded in Epofix. The specimen was collected off Rhodes, Greece. The fragment, which contains crossed lamellar structure having linear-shaped first order lamellae, has partially been etched away with hydrochloric acid (0.5 percent by volume), leaving cast of borings standing out. The external shell surface is toward right. Scanning electron micrograph, scale 0.1 mm.