Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 16. 1993. (Budapest, 1993)

- Going from the lower (older) layers towards the upper (younger) ones the percentage of Microtus arvalis decreases gradually, in the case of M. gregalis disregarding the fluctuation - it remains constant. - Pitymys can be found only in the lower layers. - The percentage of M. oeconomus and Clethrionomys increases upwards more or less gradually. - In the layer 1 the percentage of M. agrestis increases suddenly. These changes show that during the deposition of the "fine-grained" beds the climate was colder than in the case of the "coarse-grained" ones. Furthermore the data show that - in spite of the fact, that there are definitely steppe or semi-desert elements in the fauna, as the steppe lemming (Lagurus lagurus) and the jumping mice or jerboa (Allactaga jaculus) - the climate did not become much drier, considering that - at least recently - M. agrestis, M. oeconomus and also Clethrionomys glareolus are living in cool and humid areas. Considering the composition of the fauna, the area was probably a forested steppe. (I remark here that plant remains were found too. These are: a few Salix sp. leaf moulds from the travertine and Celas sp. seeds and seed fragments from each layer.) SYSTEMATICAL REMARKS In the following, the stratigraphically or paleozoogeographically most important forms of the fauna will be discussed. GASTROPODS Here I list the snail fauna, and first of all I express my gratitude to Endre KROLOPP (Hungarian Geological Institute), who determined and evaluated the snail remains. By the indication of the material the aquatic species are separated from the terrestrial ones. (Table 2) On the basis of E. KROLOPP'S communication one can separate 2 or 3 groups having different age. 1.- Late Pleistocene, Würm, terrestrial species. Their shells are filled with loessy sand. These forms indicate cooler climate as compared to the recent. Succinea oblonga Pupilla triplicata Pupilla muscorum Vertigo alpestris Columella edentula Orcula dolium Vallonia costata Vallonia tenuilabris Clausilia dubia Nesovitrea hammonis Trichia hispida Arianta arbustorum