Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 59. (Budapest 1967)

Pintér, L.: A revision of the genus Carychium O. F. Müller, 1774, in Hungary (Mollusca, Basommatophora)

perpendicularly downwards, away from the columella and towards the inside of the shell. It is further characteristic of C. tridentatum that the parietal lamella, at the point indicated by an arrow in the Figure, forms an exclinate and expanding rim in most of the cases, a feature entirely lacking in C. minimum. Following the findings of WATSON and VERDCOTJRT, the revision of the earlier data had been made in a number of European countries (as also in Hungary, but our material was destroyed in 1956). By its thoroughness, Dr. V. LOZEK'S (1957) checking of the Chechoslovakian Carychium material excels above all others. After such preliminaries, I have reexamined, in August 1966, the Carychium material Fig. 1. Carychium minimum MÜLL. — Fig. 2. Carychium tridentatum (Risso). deposited in the Hungarian Natural History Museum, and then endeavoured to gather all available materials in the possession of Hungarian malacologists for further checking and separation into species. The material totalled 16.597 shells, largely from all regions of the country. However, as will be seen from the list of localities, the present paper can only be preliminary to an even more general revision, pending ultimately on a planned faunistical exploration of the country in this respect. It is my agreeable duty to express my gratitude to all who had collected the material in question, and cordially permitted its study. Thus, first of all, to my father, Dr. I. PINTÉR, my master and main support in malacological investigations. Dr. P. AGÓCSY made available the entire mollusk collection of the Hungarian Natural History Museum which thus became the starting point of the entire revisional work. Dr. A. GEBHARDT, I. VÁSÁRHELYI, Á . KÁROLYI, Dr. J. PAPP, Dr. GY. KOVÁCS, Dr. A. RICHNOVSZKY, Dr. E. KROLOPP, I. SAJÓ, Dr. L. VÖRÖSS, and Dr. M. WIESINGER, had all sent me their Carychium materials — thanks are due to them all. I have to say especial thanks to Dr. V. LOZEK, who was the first to call my attention to the Carychium-jn ohlem and thus was the mainspring of the entire project. I had several aims in studying Carychium specimens from Hungary. I was first of all interested in the exact and secure separation of the two species, Carychium minimum and C. tridentatum. Further, I intended to establish the distribution of the two taxa, and thus correct or complete literature data, insofar as permitted by the available material. Finally, I wanted to obtain informations whether there be discernible or eventually interprétable differences between the major populations, and in how far measurement data given in literature correspond to actual examinations. This question has already been answered by the above discussion. The shape of the parietal lamella will decide specific relegation with complete certainty even for specimens doubtfully identified on the basis of other characteristics. I have examined I. Carychium minimum or tridentatum?