摘要
In 1947--1948, Prof. Wang Yongyan of the Geological Department, Northwest University of China, collected an assemblage of fossil mammals and some other vertebrates near Longjiagou village in Wudu County, Gansu Province. The fossils come from the red sandy clay, overlying unconformably on the Late Paleozoic limestone or Jurassic sandy mud. On the basis of a preliminary analysis of the several hundred fossil mammals, the most common genera are Hipparion, Chilotherium and Eostyloce-
