Miscellaneous Notes on the Cambro-Ordovician Geology and Palaeontology, No. XXV. Discovery of Proceratopyge in the Chuangia Zone in Manchuria, with a Note on the Ceratopygidae. Transactions of the Palaeontological Society of Japan N S, No. 19 1955: 65-72. 444 [Zoological Record Volume 93]