56 Bulletin 12 184 



Stidtopora gilberti (Meek) Ulrich, 



Falls of the Ohio. 



Stidlopora ovatipora Hall, 



Falls of the Ohio. 

 Stidlopora vermicula Hall, 



Falls of the Ohio (Hall). 



Trematella annulata (Trematopora (Trematella) anuulata). 

 Falls of the Ohio (Hall). 



Trematopora (Trematella) arborea " 



Falls of the Ohio 



Trematopora hirsuta Hall, 



Clark county, 



Trematopora (Orthopora) regularis " 



Falls of the Ohio 



Unitrypa acaulis (Fenestella (Unitrypa) acaulis) 

 Fallsof the Ohio (Hall). 



U nitrypa conferta Ulrich, 



Falls of the Ohio (A. E. Ulrich). 



Unitrypa fastigata Hall (Fenestella (Unitrypa) fastigata). 

 Falls of the Ohio (Hall). 



Unitrypa retrorsa Ulrich, 



Falls of the Ohio (A. E. Ulrich). 



Unitrypa stipata Hall (Fenestella (U.) stipata), 

 Falls of the Ohio (Hall). 



Unitrypa tegulata Hall (Fenestella (U. ) tegulata). 

 Falls of the Ohio (Hall). 



