Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 15. 1992. (Budapest, 1992)

topmost 1,5 m of the exposed sequence consists of pure limestone changing from well bedded to nodular in appearance. The uppermost 80 cm of coarsely nodular limestone is the most fossiliferous level yielding large gryphaeids and several specimens of Pseudopecten. The nodular structure of the rock is probably caused by bioturbation. This, together with the enrichment of other benthonic elements indicates optimal environmental conditions. GENERAL COMMENTS ON THE FAUNA AND ANNOTATED LIST OF BIVALVES The majority of the material was collected as float from the dump of the excavation. All specimens are more or less damaged. The fauna is dominated by bivalves. More than 70 specimens belonging to seven taxa were found. A conspicuous feature of the preservation is the silicification of large bivalve shells resulting in beekite structures (Pl. II, figs. 1-2). In addition to the bivalves, a few brachiopods and indeterminate fragments of belemnite rostra were also found. Two brachiopod species were identified. One of them, Liospiriferina cf. rostrata (SCHLOTHEIM) was already recorded from the Harsány-hegy by Ager and Callomon (1971). Homoeorhynchia cf. acuta (J. SOWERBY, 1818) is represented by several distinctive fragments. It is a stratigraphically important find since the species is restricted to the latest Pliensbachian (Aimeras 1964). A list of bivalve taxa with remarks concerning their morphological features and stratigraphie importance is given below. Figured specimens are deposited in the collection of the Paleontological Department, Hungarian Natural History Museum, Limea (Pseudolimea) pectinoides (J. SOWERBY, 1815) PL II, Fig. 3 According to Dhondt (1989), Pseudolimea ARKELL in DOUGLAS and ARKELL, 1932 is regarded as a subgenus of Limea BRONN, 1815. Two specimens were found. The better preserved one possesses 20 obtuse ribs with interspaces occupied by weak radial threads. The anterior and posterior areas are smooth. According to Hallam (1987), this distinct species has a long stratigraphie range from the Early Sinemurian to the end of the Pliensbachian. Plagiostoma sp. Three very incomplete specimens are available. Their ornamentation consists of fine radial threads of which at least 120 can be counted on the best preserved specimen.