. Considérations nouvelles sur les affinités réciproques des mollusques gastéropodes. Gastropoda; Mollusks. On est donc en droit de se demander si la position de l'anus sur la ligne médio-dorsale est, nécessairement, liée à la torsion. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Boutan, Louis Marie Auguste, 1859-. Bordeaux, A. Saugnac & E. Drouillard, imprimeurs

---

Size: 1702px × 1467px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1910, booksubject, booksubjectmollusks