During the period 1820 – 1850 several European scientists were active for the ’Natuurkundige Commissie’, an organisation established by the Dutch government to study the flora and fauna of the Dutch East Indies and to collect specimens for the Rijks Museum van Natuurlijke Historie in Leiden. Although most of the scientists had to deal with all kinds of problems (especially all kinds of diseases, frequently followed by an early death), they succeeded in gathering rather large zoölogical and botanical collections. In this article the members of the Natuurkundige Commissie and the molluscan species named after them are dealt with.