430 



Report of the State Geologist. 



PLATE LXVII. 



PHRAGMODICTYA, Hall. 



Page 364. 



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



Phragmodictya catilliformis, Whitfield (sp.). 



Page 365. 



(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. Orawfordsville, Indiana. 



