SILURIAN SYSTEM : ZEBINGYI STAGE. 



175 



of Zebingyi Fauna. 



Nearest Allies. 



{ 



A. semiorbis Barr. 

 A . cj/bele Barr. . . 



( M. suiipiirissiiH't Barr. 

 1 Mytilus gradatus Salter. 



Abbreviations tee Table 4. 



Horizon and Distribution of Species 



OR NEAREST AiLY. 



o 



3 



Lw. 

 Wk. 



Oc.-Wk. 



Wk. 

 L. Lw. 



Wk. 



Cc.-Wk. 



o 



Lw. 



Wk. 



Lw. 

 Wk. 



Wk. 

 Lw. 



Wk. 



a 



Wk. 



Remarks. 



