Upper Cretaceous Foraminifera from Japan

IN THIS PAPER the discovery in Japan of smaller Foraminifera from the Upper Cretaceous strata is recorded for the firsi: time. This contribution, in addition to its specific biostratigraphic application in Japan, has further interest by reason of its extension of the geo. graphic range ,of the widely distributed Cretaceous pelagic foraminiferan, Globotruncana. In the north Pacific region, Globotrun cana has heretofore been known only from the East Indian archipelago and from California. This paper forms part of a project initiated by the Natural Resources Section, General Headquarters, Supreme Commander for the Allied Powers, for the purpose of assembling paleontologic data applicable to solution of stratigraphic problems connected with exploration for oil and coal in Japan. In the course of the geological survey connected with oil exploration in the Cretaceous areas of Hokkaido, Mr. S. Iijima of the Geological Survey of Japan collected samples in 1947 from the Upper Cretaceous rocks in the vicinity of Nakagawa-mura , Nakagawa-gun , Teshio district, Hokkaido, which, on examination, proved to contain a few specimens of Globotruncana. This identification was confirmed by Dr. Paul P. Goudkoff of Los Angeles, California, in a letter dated April 29, 1948. He identified Globotrun cana canaliClilata' (Reuss) and species of Gyroidina and Pleurostomella in the sample. Subsequent study at Tohoku University of additional rock samples from the Upper Cretaceous of Hokkaido has revealed that although the occurrence of Globotruncana seems to ,be rare in the Absehinai