作者：齐陶

摘要：In September, 1974. Additional mammalian remains were collected from the Oligocene reddish clays at chaganbulage (i.e. Lügenzadage) in Alxa Zuoqi, Ningaia. A total of 4 genera or species including the genera Embolotherium and Paracadurcodon collected in 1959 are recognized in the fauna which is considered to be of the Early Oligocene age.
　  The fauna is characterized by the presence of such genera or species as Embolotherium grangeri, Paracadicrcodon suhaituensis, Harpagolestes alxaensis, and Amynodon alxaensis. The last two genera were for long thought to be absent in Oligocene.
　  All the fossils in the following list are from two beds (lower to upper):1) (74906) The genera Embolotherium, Paracadurcodon, and Harpagolestes, 2)(74907) Rodentia, Lagomorpha, Perissodactyla, and Artiodactyla etc., and 3) (74908) (upper bed) Amynodon. The fossiliferous reddish clays overlying a series of the boulder bed and sandy gravel bed (in Housburdu area) reaches a thickness of about 40 metres. While the boulder bed and sandy gravel bed are about 50 m. thick. No fossils other than these mammals are found in this area.
　  As the whole, through analysis of this fauna it leads to the conclusion that the fauna represents one of the Early Oligocene assemblage.

卷期：13卷 04期