摘要：In the Journal of the Anthropological Society of Nippon Vol. LXI. No. 691, Jan. 1950, the author published his detailed bacteriological study on the bacteria in various layers of three neolithic shellmounds with Jomon pottery in Kanto District, Okadaira in Ibaragi Pref., Ubayama in Chiba Pref. and Kyu-Hommaru of the Imperial Palace in Tokyo. A search for the same species of the bacteria in shellmounds was made with the ground of the Tokyo University to find out six species of bacteria;Micrscrococcus eatonii, M.ureae, Bacillus megatherium, B.ubicuitarius B.terminalis and B.tardious.As the pH and concentration of Ca are seemingly higher in shellmounds than in normal grounds, the author compared the several characters of bacteria in the ground with those in shellmounds. Two species of the six in the shellmounds proved to live and propagate themselves in higher pH bouillon and three in higher concentration of CaCl2 bouillon. While in NaC1 bouillon both the bacteria in the shellmounds and those in the normal ground marked no such differences.Generally, it is known, any organismus will gradually adapt itself to the given environmental conditions. So even if the special characters of bacteria in the shellmounds would be different from those in normal ground, it does not necessarily lead to the conclusion that the bacteria survived from the neolithic age.
