The fishes described in this paper were collected from Showchang ofChekiang Province.There are seven specimens,all of which are imperfectlypreserved.There is one,however,comparatively complete in its outline.The
[19]CHI PING,PH. D. Research Professor of China Foundation at the Biological Laboratory of the Science Society of China,Nanking, the Fan Memorial Institute of Biology,Peiping..ON SOME NEW FOSSIL MOLLUSKS OF MONGOLIA[J].Acta Geologica Sinica,1931(1).