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Japan, that is, Honshu, Shikoku and Kyushu, Rana brevipoda brevipoda is fbund together with Rana nigromaculata in the Tokai and Kinki districts of Honshu and along the sheres ofthe eastern side of the Inland Sea. Rana brevipoda porosa occurs in the Kanto and Sendai plains and in most ofthe areas along the Shinano River. The fact that the two species are incompletely isolated reproductively from...