17 



Wide apart from the extensive Cambrian region of Manchuria, Shan-tung 

 and Shan-si, there is anotlier Cambrian tract in southern China and especially 

 in eastern Yun-nan, where J. Deprat and H. Mansuy^^ recognized the follow- 

 ing rock successions and fossils : 



Acadian — green and rosy shale and sandstones, sandstones with 

 Disciiia sp. 



Acrotlu'lc tnat]icivsi cryx Waixott 

 Oholns daiiicsi Walcott 

 Li)igiilclla sp. 



Palacolcjitis dc^)-ati Mansuv 

 Ptyclioparia yuiiancnsis Mansuy 

 Bradoria dojivillci ^Mansuy 

 Aviiclla prisca Mansuy 

 Hyalites sp. 



Georgien — 



^ Upper division — Marl and sandstone with 

 Oholus cJiiiioisis Walcott 

 O. detritus Mansuy 

 Palneolenus dtnivillei Mansuy 

 P. laiiteiiflisi Mansuy 

 RcdlicJiin iiobilis Walcott 

 Ahita sp. 

 No t ho so e sp. 



Middle division — Marl and sandstone in alternation, with 

 Obolus detritus Mansuy 

 Redlicliia chiiiensis Walcott 

 A', eariunta Mansuy 

 A', ivaleotti Man.suy 

 Lower division — Variegated marly shale wit]» 

 Aerotliele orbicularis Mansuy 

 Ling'ula yuniietuitensis Mansuy 

 Obolus sp. 

 V Liu^il'ulella sp. 



i) J. DKi'RA r: Les series stratigraphiques en Indochine et au Yunnan. Mem. serv. geol. de 

 rindochine Vol. IL, fasc. 2. 1913. J. Deprat et H. Mansuy: Etude geologique du Yun- 

 nan oriental. Part \. Geologic Generale par Deprat. Mem. Vol. I., fasc. i. igi2. Part 

 2. Pa k'ontolcgie par Mansuy. Mem. Vol. I., fasc. 2. 1912. 



a, 

 a, 



