American malacological bulletin (1988) (18156606335)

Title: American malacological bulletin
Identifier: americanmal6719881990amer (find matches)
Year: 1983 (1980s)
Authors: American Malacological Union
Subjects: Mollusks; Mollusks
Publisher: (Hattiesburg, Miss. ?) : (American Malacological Union)
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library



Text Appearing Before Image:
TAN TIU AND PREZANT: SHELL MICROSTRUCTURE OF CORBICULA 67
Text Appearing After Image:
Fig. 2. Area A, overlain by periostracum, consisting of laths not organized into second order lamellae. Referred to as Crossed-Lamella One in the text (horizontal field width (HFW) = 14 ^m). Fig. 3. Area B, just dorsal to Area A consisting of secondary lamellae of opposing directions, together with Fig. 4 (Area C) make up Crossed-Lamella Two referred to in the text (HFW = 14 ^m). Fig. 4. Area C, between Areas B and pallial line with overlying organic matrix (HFW = 14 nm). Fig. 5. Area D, just dorsal to pallial line (part of transition zone) consisting of narrow lamellae (HFW = 14 /im). Fig. 6. Area E, middle third of transition zone consisting of wide irregular lamellae (HFW = 14 ^m). Fig. 7. Area F, just dorsal to Area E consisting of laths superimposed on irregularly fused lamellae (HFW = 14 ^m). Fig. 8. Area G, at level of ventral margin of adductor scar consisting of irregularly fused lamellae that are perpendicular to shell surface. Referred to in the text as Complex Crossed-Lamella One (HFW = 14 pm). Fig. 9. Area H, at level of dorsal margin of adductor scar consists of overlapping broad lamellae, together with Fig. 10 (Area I) below is referred to as Complex Crossed-Lamella Two (HFW = 14 ^m). Fig. 10. Area I, near umbo (where tubules are located) can be eroded (HFW = 14 ^m).