Dr. Fűköh Levente szerk.: Malakológiai Tájékoztató 11. (Eger, 1992.)

A. Dávid: Distribution of Molluscs of the Molluscan Clay of Two Localities According to Habitats and Feeding Habits

sideration predators represent 41,5 percent of species. Number of individuals in case of predators is 360 specimen. It is almost three-quarters of the molluscs from this sample. Nearly the qarter of species is suspension-feeder. The number of the species and that of the individuals are almost the same in the case of deposit-feeders and parasites. While the only specimen of browsers could get presumably from higher levels into the clayey strata. Nyárjas Hill The molluscan remains of this sample consist of 275 individuals representing 32 species (Table 1/B). 75 percent of species are the member of the infauna. According to the number of species the suspension-feeders and predators are represented equally. But the number of individuals is much more bigger - 177 specimen - almost the two-thirds of the molluscan remains. The number of species and individuals are nearly the same in case of deposit-feeders and parasites. There is no browser in the sample. (Table 2. and Table 3.) Molluscs of the Molluscan Clay of the two localities were the members of the Hinia - Cadulus fossil community. Though it refers to same environment on the basis of the number and distribution of the molluscs according to habitats and feeding habits we can conclude on microenvironmental differences between the two localities. Báldi, T. (1973): Mollusc Fauna of the Hungarian Upper Oligocène (Egerian). - Akadémia Kiadó, Budapest, p: 511. Báldi, T. (1986): Mid-Tertiary Stratigraphy and Paleogeographic Evolution of Hungary. Akadémia Kiadó, Budapest, p: 201. Dávid, A. (1991): New Paleoecological Observations on the Shells of Upper-Oligocene Molluscs (Wind Brickyard, Eger, Hungary) (in Hungarian). - Malakológiai Tájékoztató 9: 12-14 p. Ekdale, A. A. (1985): Paleoecology of the Marine Endobenthos. - Plaeogeography, Palaeoclimatology Palaeoecology, 50: 63-81 p. Conclusions LITERATURE CITED Dávid Árpád EGER, Faiskola u. 6. H - 3300 Hungary TABLE l/A LIST OF SPECIES, WIND BRICKYARD 1. Nuculana anticeplicata 2. N. psammobiaeformis 3. Yoldia raulini 4. Glycymeris sp. 5. Limopsis anomala 1* 1 3 1 2