332 DlCTYOSl*<>NGIDJi. 



PLATE LXVII. 

 PHRAGMODICTYA, Hall. 



Page 172. 

 (See Plates LXIV, LXV, LXVI, LXVIII.) 



Phragmodictya catilliformis, Whitfield (sp.). 



Page 173. 

 (See Plates LXIV, LXV, LXVI, LXVIII.) 



Figures 1, 2. Opposite sides of a slender specimen, whose basal disc has an 



elongate apical scar of attachment. 

 Figure 3. A characteristic example of average dimensions showing the 



aperture and basal disc. 

 Figure 4. The apertural portion of a very large individual, showing the 



expanded cup, with the vertical ridges and scattered nodes of the 



surface. 



Keokuk group. CrmofordsvilU, Indiana. 



