Abstract
The fossill mollusca treated here are those collected by Mr., R., ENDO, geologist of the Imperial Geological Survey of Japan, from Katanisi Oil Field, Akita Prefecture., The fossil fauna is found at Tayazawa, Wakimoto-mura, Minami Akita-gori, and consists of 52 species of mollusca, as listed in the table inserted in the Japanese text, among which Pecten (Patinopecten) yessoensis JAY is most common ; no shells of the warm water type (Kurosio type) are found., Of these 52 species, 8 species are found only as fossils, while the remaining 44 are fossil as well as living., From the presence of Turritella nipponica YOKOYAMA, which is found very frequently in the Pleistocene series of our country, the writer believes the fossil fauna is later Pliocene or Plio-Pleistocene in age., Short remarks and figures are given on some interesting shells.,
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