DESCRIPTION OF PUVTE 28. 



Fistulipora willisiana Girty (p. 305). 



1 . Tangential section, X 20. 



2. Tangential section, X 35. 



Pre-Pennsylvanian (?), near Ta-miau-ss'i (station 8). 



Fistulipora waageniana Girty (p. 316). 



3. Vertical section, X 20. 



4. Tangential section through the superficial portion of the mature region where the inlerzocecial spaces 



are filled in with tissue so arranged as to give a polygonal aspect to the cells. X 20. 



5. Tangential section, X 20. Usual appearance in the mature region below the outer thickened layer. 



Here the zocecia are round, with a distinct investing wall and with small but distinct lunaria. 

 Pennsylvania!! (Wu-shan limestone), near Ta-uing-hien (station 2). 



Batostomella meekana Girty ((p. 315). 



6. Tangential section, X 20. 



7. Tangential section, X 35. 



8. Vertical section, X 35. 



Pennsylvanian (Wu-shan limestone), near Ta-ning-hien (station 4). 



Geinitzella chinensis Girty (p. 315). 



9. Vertical section, X 20. 

 10. Tangential section, X 20. The aspect of the walls is shown in the immature and early mature 



regions. 

 n. Tangential section, X 3,5. The acanthopores are large and open, and vary in shape and size. 



12. Tangential section, X 20. The acanthopores are seen to be open. The fact that they indent the 



zooecial walls betrays their real character as acanthopores instead of mesopores. 



13. Tangential section, X 20. A section through the mature region, showing the usual characters. 



Pennsylvanian (Wu-shan limestone), near Ta-ning-hien (station i). 



14. Fragment, natural size, from another locality. 



Pennsylvanian (Wu-shan limestone), near Ta-ning-hien (station 4). 



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