This book was actually intended to do nothing more than give a summary of all of my malacological transcripts which have been published in Spixiana (Munich) and La Conchiglia (Rome) over a period of some 20 years. My professional activity in the last 30 years has no longer allowed me to keep at this seashell hobby, in terms of both collecting and publishing. Thanks to my friend, the late Josef Fittkau, former director of the Bavarian State Collection of Zoology, it was agreed that my very extensive collection of seashells would one day be integrated into the collections of the Bavarian State Collection of Zoology. Some of the favourites in my collection were “Bursidae” and “Distorsio”. My diverse publications not insig- nificantly helped make more comprehensible what had been a somewhat confusing classification for the two families of these seashell species. My last publications on the Personidae family (“Distorsio”) were followed by further works from diverse malacologists who took a position in particular with regard to some of my works, but in my opinion the contents of their works did not correspond to the facts. I also took this as an opportunity to report once again on my “beloved Distorsio” in this book. As already mentioned, this book was meant only to constitute a summarization of all of my malacological publications.