Newsletters and annotated directories are important sources of information in science. Most newsletters concentrating on individual research in progress are not formally published but circularized. Reporting on results or findings in circularized newsletters (‘non-publications’) often means misplacing the material and almost always non-availability through secondary services. The circularized newsletters are mostly very efficient means of information among the established specialists on the mailing-lists. but the information seldom reaches newcomers and non-specialists. In order to make their existence known in somewhat wider circles, Lethaia offers space for onepage presentations of newsletters relevant to palaeontology and stratigraphy.