In 1937 C. O. van Regteren Altena D. Sc. published the well-known ”Bijdrage tot de kennis der recente, subfossiele en fossiele mollusken die op de Nederlandsche stranden aanspoelen en hunner verspreiding” (Contribution to the knowledge of the recent, subfossil and fossil Mollusca washed ashore on the Netherlands coast and their distribution). This is the first monograph on the Netherlands marine mollusca in which all the known species are mentioned with data and localities, and we may say that this publication has been a stimulus for the gathering of marine mollusca by a number of junior biologists and geologists, students as well as amateurs.