Plate LV Continued. 



PAGE. 



Fig. 8. LYBOPOBA OVAIJS Ulr. (See also PI. LVIII) ...................................... 5^5 



Vertical section showing large cells with well developed hemicepta, x!8. 

 Chester group, Litchfleld. Ky. 



Fig. 9. PHYLLOPOBA SUPEBBA Ulr. (See also PL XLIV) ................................ 613 



9. Vertical sestion, x!8, showing large erect zoo?cia. 



9 a, Horizontal section, x!8. The lower half represents the dense dermal 

 layer, while in the upper half the zocecia are shown. 

 Hamilton group, Erie Co., N. Y. 



.81. 

 Fig. 10. PHYLLOPOBA? sp. indet ............................................................. 612 



Horizontal section, x!8, showing the structure of the zoocoia at levels 

 varying between their apertures and the basal layer. 

 Hamilton group, Widder, Canada. 



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