PAPERS ON GEOLOGY AND GEOGRAPHY 425 



4. These features involve a reconstruction of struc- 

 tures where these have been based on the accepted corre- 

 lation of coals. This is especially true near the margin 

 of the basin where the correlation is less certain. 



5. It appears probable that further search will reveal 

 new zones of Fusulinas and that therefore the utility of 

 these fossils as stratigraphic guides should be seriously 

 questioned. 



