云南路南早第三紀哺乳动物

<正> 关于滇东路南地区的第三紀哺乳动物化石及其时代問題,最初曾由楊鈡健、卞美年（1939,1940）及周明鎮（1957）等进行过研究。近几年来,地貭部博物館胡承志先生,以及本所云南野外工作队,对滇东进行了多次調查和化石采集工作,相继在路南以南的扳桥及大可村附近发現了相当丰富的哺乳动物化石。其中絕大部分材料均已研究发表(周, The Tertiary fossil mammals and the fossil bearing beds of Lunan, Yunnan were first studied by Young and Bien （1939）. In recent years many new materials had been found and most of them had been investigated and published （Chow, 1957; 19581; 19582 Chow and Hu, 1959; Chow and Xu, 1961）. Chow not only reexamined the collection, which had been preliminarily identified by Young and Bien （1939）, and confirmed the age of the fossil bearing sediments to be Latest Eocene, but also pointed out, on the basis of the new materials, that a stratum of Oligocene age occurs in the upper part of the series of Lunan beds. He divided this series into two parts; the upper part of the series was called "Upper Lunan stratum", and dated to be Early Oligocene; the lower part was called "Lower Lunan stratum", and dated to be Latest Eocene.The present paper describes some mammalian fossils recently collected in these beds, and discusses the character and age of the fossil mammalian fauna of Lunan.A list of the fossil mammals described in this paper is given below: Brontotheriidae Rhinotitan quadridens sp. nov. Brontotheriidae indet. Helaletidae Teleolophus medius M. & G. Amynodontidae Amynodon altidens sp. nov. Amynodon sp. of. Metamynodon sp. Rhinocerotidae Prohyracodon progressa Chow & Xu Rhinocerotidae indet. Entelodontidae Eoentelodon yunnanense Chow