Figure 5 in The evolutionary and biomechanical implications of snout and proboscis morphology in Caenogastropoda (Mollusca: Gastropoda)

Figure 5. Transverse histological sections through the snout of four caenogastropod taxa. (A) Rissoina crassa (Rissoidae) snout; (B) R. crassa circumoesophageal nerve ring and aortic muscles (C) R. crassa snout wall; (D) Edgbastonia alanwillsi (Hydrobiidae) snout; (E) E. alanwillsi snout wall; (F) Vanikoro cancellata (Vanikoridae) snout; (G) V. cancellata snout wall; (H) Bostrycapulus pritzkeri (Calyptraeidae) snout; (I) B. pritzkeri snout wall. Scale bars: (A, B, D, H) 200 µm; (C, E, G, I) 50 µm; (F) 1 mm; for abbreviations see Appendix 2.