Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 62. (Budapest 1970)

M. Nyírő, R.: Study of the smaller Foraminifera of the Weimpuszta Middle Eocene key section at Nagyesztergár (Bakony Mountains, Transdanubia, Hungary)

umbilical hollow. The latter is hardly discernible on the given specimen ; aperture, chamber disposition, and test shape are, however, identical. New for Hungary. Cuisian and Lutetian of France; several specimens in the Middle, very rarely in the Upper Eocene of Belgium. Gen. Asterigerina D'ORBIGNY, 1839 Asterigerina rotula (KAUFMAN) group 1867 Hemistegina rotula KAUFMANN, KAUFMANN: Beitr. Geol. Karte Schweiz, No. 5, p. 150, fig. 86 a, b, c. 1967 Asterigerina rotula (KAUFMANN), VITÁLIS-ZILAHY : M. Áll. Földt. Int. évi jel. 1965, p. 409, pl. X, fig. 1, 2, 3. It can be traced from sample 71 of the Assilina spira horizon onwards. In this horizon it is common enough, while in the overlying Nummulites perforatus horizon it occurs en masse. The specimens in the Assilina spira horizon are small an thin, those of the N. perforatus horizon bigger and thicker. They display considerable variation in both horizons, so a detailed study may result in identifying several subspecies. Very common in the Middle and Upper Eocene of Hungary and all over Europe. Gen. Rotalia LAMARCK, 1804 Rotalia div. sp. Rotalia species appear already in the Assilina spira horizon ; in the Nummulites perforatus horizon, however, they play a prominent role. The forms represent several species. The Rotalia lithothamnica group displays a wide variation. Rotalia umbilicata is common, as well. The Rotalia species of the Hungarian Eocene are being investigated as to their nomenclature and stratigraphie value by Mrs. L. VITÁLIS-ZILAHY. Gen. Elphidium MONTFORT, 1808 Elphidium laeve (D'ORBIGNY) Plate II, Fig. 2. 1865 Nonionina laevis D'ORBIGNY, in PARKER, JONES & BRADY: Ann. Mag. Nat. Hist., vol. 16, ser. 3, pl. 3, fig. 97. 1939 Nonion laeve (D'ORBIGNY), CUSHMAN: V.S. Geol. Survey, Prof. Paper no. 191, p. 3, pl. 1, fig. 6-7. 1961 Elphidium laeve (D'ORBIGNY), KAASSCHIETER: Inst. Roy. d. Sei. aat. de Belg. Mem., Mem. no. 147, p. 239, pl. XVI, fig. 15-16. It appears in the higher part of the Assilina spira horizon, being fairly common in samples 86 and 87. The specimens are small. The test is in section circular, with