Plate LVI Continued. 



PAGE. 



Fig. 9. SEPTOPORA KOBUSTA Ulr. (See also PI. LXIV.) 633 



9. Horizontal section, x!8. 



9 a. Transverse section of a branch with dissepiment. x!8. 



9 b. Transverse section of a branch, x!8. 



9 c. Vertical section of a branch, x 18. showing nearly direct zocecia and the 



thin interspaces. 



Upper Coal Measures of Illinois. 



Fig. 10. SEPTOPORA ROBUSTA var. INTERMEDIA. (See also PI. LXIV.) 634 



Horizontal section, x21, showing long uniting pinnte or dissepi- 

 ments. 

 Chester group, Litohfleld, Ky. 



Fig. 11. SEPTOPORA BISERIALIS Swallow ' 631 



Horizontal section, x!8. showing the doited interspaces and accesssory 



pores. 



Upper Coal Measures, Kansas City, Mo. 







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