[Silurian Trilobita.]. Nanking Institute of Geology Palaeontology, [Ed]. [A handbook of the stratigraphy and palaeontology in southwest China] 1-454, figs l-66, pls l-202., Science Press, Academia Sinica, Peking., 1974: 173-187. Chapter pagination: 173-187. 184 [Zoological Record Volume 111]