Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 64. (Budapest 1972)
Jánossy, D.: Middle Pliocene microvertebrate fauna from the Osztramos Loc. 1. (Northern Hungary)
the posterior side, the protocone is not immediately connected with the paracone but only by the transmission of the longitudinal ridge. There are four outer valleys (Aussensynklinale), the paracone and the metacone are somewhat more elevated than the other parts of the tooth. The remain seems to differ from the jumping mouse, described by BACHMAYER and WILSON (Protozapus intermedins, 1970), by the considerably weaker inner valley (Innenbucht) and by the indication of a ,,pseudoprotoloph". The length of the tooth is 1.06, the width 0.81 mm. As far as I know this is the first record of this form apart from the type-locality (Wçze). Spalacidae Prospalax kretzoii n.sp. — detailed description see below. Muridae Apodemus aff. domináns KRETZOI, 1959 With more than a hundered remains (from both localities 1/b and 1/c) of chiefly isolated teeth this mouse is the second in dominance in the Osztramos Pliocene Microvertebrate fauna. The investigation of the material established the morphological homogenity of the remains and the close resemblance with the array of forms Apodemus primaevus HUGUNEY et MEIN, 1965, alsomyoides SCHATJB, 1938 and domináns KRETZOI, 1959. The lower M, resemble Apodemus sylvaticus, the antero central cusp (,,paraconid") is sometimes isolated or reduced and there is often a posterior valley between the antero-central and antero-external cusp, the labial accessory cusps are strongly built. The length of 40 M. l teeth ranges between 1.5-1.8 mm. In the upper M 1 no reduction of elements appear (the cusp t 7 is always present). To assign our form definitely to an Upper Pliocene species of Apodemus is problematic chiefly owdng to the very close morphological resemblances of the species in question. I use here the name A. domináns KRETZOI, stratigraphically and morphologically apparently nearest the Osztramos form. No unambigous evidence for the presence of Progonomys can be produced. Cricetidae Rotundomys (Kowalskia) polonica FAHLBUSCH, 1969; — R. (K.) magna FAHLBUSCH, 1969; — R. (K.) sp. About sixty specimens of isolated teeth, i. e. maxilla or mandible fragments belonging unambiguously to Cricetid rodents. FAHLBUSCH'S (1969) new revision renders orientation easier in the many forms of Pliocene Cricetine rodents. FAHLBUSCH described in his w r ork the new genus Kotvalskia, emphasizing the combination of atavistic and modern features in this taxonomical unit. As primitive may be interpreted the low crowned molars, the well developed mesoloph i. e. mesolophid and the unified or very slightly (into two or more cusps) divided wall of the anteroconid, as w r ell as the special divergence of the „anterior ridges" (Vordergrat) in M. v A progressive feature of this tooth is
