DEVONIAN SYSTEM : PLATEAU LIMESTONE. 



237 



Padaukpin Fauna — concluded. 



ASIA. 









Western 



Central. 



Eastern. 







Remarks. 



Armenia. 



N. Persia. 



Hindu Kush. 



Turkestan. 



1 



Tian Shan. 



Kuen Lun. 



Siberia. 



G 



c£ 



O 



O 



H 

 o 

 go 



Yunnan. 



Sfj 



c 



N. America. 



Australia. 



























. 



Dev., Cornwall. 



































» 



















Occurs in the Altai 

 Mts. 



























cf. A. inconstans 

 Phill., var. costulatus 

 D'Arch., Dev., Corn- 

 wall. 







| 























! 



