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The material dealt with in the present paper was collected by thelate Dr. V. K. Ting in 1933 with the specific object of determining theboundaries of the Carboniferous and Permian developments in Russiaand their stratigraphical relation to the Huanglung, Chuanshan and
The material dealt with in the present paper was collected by thelate Dr. V. K. Ting in 1933 with the specific object of determining theboundaries of the Carboniferous and Permian developments in Russia and their stratigraphical relation to the Huanglung, Chuanshan and