7 





Lower 



Cambrian 



Middle 

 Cambrian 



Upper 

 Cambrian 



Shan-tunp 



Shan-si 





Liau-tung 



0/>o///s 7nLiiiiialts ? 







X 



X 







1 



O. ntiininiLS 





X 





X 









Obohts obscufiis 





X 





X 



X 







0, shansiensis 





X 







X 



X 



X 



O. {IVesiotu'a) bhck-,i<elJeri 





X 





X 









0. (IV.) sp. undt. 







X 



X 









J-jiHgiilelltt i}i'}iic/ittrie7isis 





X 











X 



L> }}iafcu'i 





X 











X 



L. (Lmgidepls) eras 





X 





X 









I. (L. ?) sp. undt. 





X 







X 











X 





X 





X 





Obolelta asiatica 



X 







X 





X 





Yorkia ? orienialis 





X 







X 







Acrotiiele matJieioi ervx 





X 





X 







X 



A. ? niinuta 





X 





X 









A. rara 





X 





X 









A. lisard 





X 





X 









Acroireta pacifica 





X 





X 







X 



Ac, shiiHtujigeiisis 





X 





X 



X 



X 



X 



Ac. 'c Cnia 





X 











X 



Discinopsu sukatns 







X ; 



X 









/ illingsella pumpellyi 







X 



X 









B, ruhthofeiii 



X 







X 









Ecortliis agreste 





X 





X 









E. dorii 







X 



X 









E. kayseri 







X 



X 



X 







E. kicJioiiemis 





X 







X 







E. liimarsoni 







X 1 



X 









E. pagoda 







X 



X 









E. sp. undt. (a) 





X 





X 









