(i) 100 



Puhl OiitoJngid Siiiica 



Ser B. 



--■Boundaries of Provinces = — ^^-o-^^ Railroads and Stations ■—~- 

 • Ordoyician Localities o Other important Cities 



Great Wall 



Scale of Miles 



Fit:. 20. Ma|) of North-eastern China, sliowing the luralitii-s wliere Ordovician fossils have Ijeen found. 



(i^'ee tlie li«t on tlie ])receding page.) 



