The specimens described in this paper were collected in the spring of 1955 by the writer andher friends from the Lower Permian Chihsia limestone at Kwanshan, Lungtan, about 20 kmsoutheast of Nanking. The ostracods described and illustrated here comprise 37 species in 11genera, of which 29 species are new. The majority of the specimens were found in the middlepart (ca. 138 m. in thickness) of the Chihsia formation. The specimens are more or less