The present paper describes a molluscan occurrence, rich in macrofossils, of the Burdi galian north of Fels am Wagram in Lower Austria. In the course of several years, various gentlemen and the author had collected i.a. a rich microfauna which had not yet been known to exist in the Austrian Burdigalian and which made the beds-of little local extent appear to be particularly interesting. There were established 166 species and subspecies (thereof described Lamellibranchiata: 48, Scaphopoda: 1, Gastropoda: 47), the most important of which were dipicted. A supple ment to the systematic part shows...