Dr. Nagy I. Zoltán szerk.: Fragmenta Mineralogica Et Palaentologica 5. 1974. (Budapest, 1974)

In the Central-Eastern European succession the position in time of Osztramos 9. and 13. does'not seem quite convincing but there are some other biological and geological arguments speaking for an older age as Osztramos Loc. 1. and a younger one as Podlesice. The geological argument may be as mentioned in my previous paper (JÁNOSSY, 1973) "the dark red clay of Loc. 1. Osztramos.

.. penetrates the matrix of Loc. 13." filling up a tectonically preformed fissure and arguing a geologically younger age of the former one. Some very primitive rodents in Podlesice (personal comm. of KOWALSKI), strengthen the older age of this Locality besides the shrews too. The only disturbing fact is the return of common forms in Podlesice and Osztramos 1. (Wartamys, Polonomys, Kowalskia) entirely lacking from Osztramos 9. with the appearence of the mentioned, below described peculiar Arvicolids. Unfortunately we have not the possibility to connect the Osztramos local microfaunas with the classical European Hipparion assemblages. The zoogeographical differences between the Eastern and Western European micromammalian faunas constitute a special problem, which make more difficult the correlation in the whole territory of our continent (e.g. Stephanomys, Ruscinomysandan otherwise rich Murine fauna only in Western, Amblycoptus, Prospalax in Eastern Europe etc.

). However the gaps in the Pliocene successions are in both territories so remarkable, that we are far from a continuous succession. Otherwise, we have to hope from the rapid advance in the investigation of small mammal successions from year to year the narrowing and precising of these hiatuses. DESCRIPTION OF NEW SPECIES Glires LINNÉ 1758 Myoxidae WATERHOUSE 1839 Muscardinus KAUP 1829 Muscardinus giganteus n. sp. Derivatio nominis: "giganteus" from the Latin: extremly large, referring to the size of the holotype. Stratum locusque typicus: Horizontal cave system in the SE part of the western-lying quarry (No DC.) of Hill Osztramos, at about 350 m height a. 8.1., on the confines of the villages Tornaszentandrás, Bódvaszilas and Bódvarákó (NE Hungary, 50 km north of the town Miskolc). Age: Middle Pliocene ("postpannonian Pliocene") Holotype: right first upper molar. Inventary Number: V. 74. 2. Collection of the Paleontological Department of the Natural History Museum, Budapest.