caption: The image shows a glass vial filled with a white substance sitting on top of a table, surrounded by papers with text written on them. The papers appear to be related to a planorbidae, a type of convexiusculus, which is a small, cylindrical object with a narrow neck and a wide base. The vial is filled to the brim with the white substance, and the papers are scattered around it, suggesting that it is part of a larger collection.