Plate LXXI Continued. 



PAGE 



Tig. 9. STKEBLOTBYPA NICKLESI Ulr 66T 



9 and 9 n. Three fragments of the natural size, and the surface of one. x!8. 

 9 6, Tangential section, x50, showing structure and arrangement of meso- 



pores. 

 9 c. Vertical section, x!8, showing inferior hemisepta and very slender 



tubes in the axial region. 



Chester group, Ka^kaskia, 111. 



E. 0. Ulrich's collection. 



Fig. 10. STBEBLOTHYPA DISTINCTA Ulr 



10. Fragment natural size, with a portion x!8. 



10 <i. Portion of another fragment on which the transverse arrangement of 



the zoo3cia apertures pievails. 

 10 b. Two portions of tangential sections, x!8. 



Chester group, Chester, 111. 



Illinois State Museum. 



669 



