Figure 6 in The evolutionary and biomechanical implications of snout and proboscis morphology in Caenogastropoda (Mollusca: Gastropoda)

Figure 6. Transverse histological sections through the snout or proboscis of three caenogastropod taxa. (A) Strombus gibberulus (Strombidae) snout; (B) S. gibberulus ventral snout; (C) S. gibberulus snout wall; (D) Conuber sordidus (Naticidae) everted proboscis; (E) C. sordidus circular sheath and accessory proboscis retractor muscles; (F) C. sordidus proboscis wall; (G) Monetaria annulus (Cypraeidae) introverted proboscis; (H) M. annulus aortic muscles and ventrolateral proboscis retractor muscles; (I) M. annulus proboscis wall. Scale bars: (A, B, G) 1 mm; (C, F, I) 200 µm; (D, E, H) 500 µm; for abbreviations see Appendix 2.