抄録
A large gastropod shell, Hemifusus crassicauda (Philippi) (Caenogastropoda, Melongenidae), has
been collected from the middle Pleistocene Ogushi Formation (marine oxygen isotope stage 7: 250 to
230 ka) in Itsuwa-machi, Amakusa City, Kumamoto Prefecture, southwest Japan. Crassostrea gigas
attached to be inner aperture of the present specimen and Spirorbidae gen. et sp. indet. also attached
its shell surface of apertural side.
