Remains of Mesozoic Reptiles have been recorded for several yearsfrom various places in N.China.But no discovery of this kind had beenannounced from the South until Dr.W.H.Wong in 1931 found the fossili-ferous site of Erh-yen,near Chungking,in the Tzekuei series (Lower Cretace-ous) of Szechuan~1.