14 POLYZOANS. 



or attached to foreign objects; surface even, often slightly 

 spinous. Zocecial walls thick ; openings elliptical, surrounded 

 by numerous small mesopores. Acanthopores rather large. 



Horizon and localities. Lower Carboniferous, Keokuk 

 limestone : LaGrange, Wayland and other places in north- 

 eastern Missouri; and in the same beds of the contiguous por- 

 tions of the adjoining states. 



Leioclema foliatum ULRICH. 



Leioclema fohatum Ulrich, 1890: Geol. Sur. Illinois, vol. VIII, p. 431, 



fig. 1 (on p. 301). 



Horizon and localities. Lower Carboniferous, Keokuk 

 beds : Warsaw ( Illinois ). 



Leioclema araneum ULRICH. 



Leioclema araneum Ulrich, 1890: Geol. Sur. Illinois, vol. VIII, p. 431, 

 pi. Ixxv, figs. 9-9c. 



Horizon and localities. Lower Carboniferous, Chester 

 shales: Ste. Genevieve ; Chester ( Illinois). 



Batostomella nitidula ULRICH. 



Batostomella nitidula Ulrich, 1890: Geol. Sur. Illinois, vol. VIII, p. 436, 

 pi. Ixxv, figs. 3-3b. 



Horizon and localities Lower Carboniferous, Chester 

 shales : Chester ( Illinois ) ; apparently the same form as occurs 

 in Ste. Genevieve county, Missouri. 



Stenopora americana ULRICH. 



Stenopora americana Ulrich, 1890: Geol. Sur. Illinois, vol. VIIL, p. 437, 



pi. Ixxv, figs. 1-la. 

 Stenopora americana, var. varsaviensis Ulrich, 1890: Geol. Sur. Illinois, 



vol. VIII, p. 437, pi. Ixxiv, figs. 3-3a. 



Horizon and localities. Lower Carboniferous, Keokuk 

 limestone: Warsaw ( Illinois). 



Stenopora montifera ULRICH. 



Stenopora montifera Ulrich, 1890: Geol. Sur. Illinois, vol. VIII, p 438, 

 pi. Ixxiv, figs. 4-4b. 



Horizon and localities. Lower Carboniferous, Keokuk 

 limestone: Clark county ; Bentonsport (Iowa). 



