The stratigraphy of the Permian Karita formation exposed near Hiroshima City is described and its correlation with the Maizuru group in the Maizuru belt is discussed, with special reference to the stratigraphic relationship among the Lepidolina toriyamai, the Colaniella cf. minima and the Leptodus richthofeni horizon. Paleontological descriptions of some important foraminiferal species are presented as an appendix.