18 POLYZOANS. 



Coscinium? latum ULRICH. 



Coscinium latum Ulrich, 1890: Geol. Sur. Illinois, vol. VIII, p. 497, pi. 

 Ixxvi, figs. 7-7b. 



Zoarium large, forming a broad, flattened, reticulated frond, 

 with a large expanded basal portion attached to foreign objects. 

 Zooecial openings somewhat reniform, regularly arranged in 

 rows. 



Horizon and localities. Lower Carboniferous, Burlington 

 limestone : Hannibal ? ; Burlington ( Iowa ) ; Quincy ( Illinois). 



Dichotrypa intermedia ULRTCH. 



Dichotrypa intermedia Ulricb, 1890: Geol Sur. Illinois, vol VIII, p. 500, 

 pi. Ixxvi, figs. 9-9c. 



Zoarium forming broad, fan-shaped fronds, with attenu- 

 ated margins ; surface smooth, zocecial apertures circular, and 

 arranged in more or less distinct rows. 



Horizon and localities. Lower Carboniferous, Saint Louis 

 limestone: St. Louis. 



Actinotrypa pecularis ( ROMINGER). 



Plate xxxiv, fig. 6. 



Fistulipora pecularis Rominger, 1866 : Proc. Acad. Nat. Sci., Phila., p. 123. 

 Actinotrypa pecularis Ulrich, 1890 : Geol. Sur. Illinois, vol. VIII, p. 503, pi. 

 Ixxvii, figs. 3-3b. 



Horizon and localities. Lower Carboniferous, Keokuk 

 limestone: LaGrange; Keokuk ( Iowa). 



Prismopora trifoiia (ROMINGER). 



Fistulipora trifolia Rominger, 1866 : Proc. Acad. Nat. Sci. , Phila., p. 122. 

 Prismopora trifoha Ulrich, 1890: Geol. Sur. Illinois, vol. VIII, p. 505, 

 pi. Ixxvii, figs. 4-4a. 



Horizon and localities Lower Carboniferous, Keokuk 

 limestone: LaGrange; Keokuk ( Iowa). 



Evactinopora sexradiata MEEK & WORTHKX. 



Evactinopora sexradiata Meek <fe Worthen, 1868: Geol. Sur. Illinois, vol. 



Ill, p. 502, pi. xvii, fig. 3. 

 Evactinopora sexradiata Ulrich, 1890: Geol. Sur. Illinois, vol. VIII, p. 510, 



pi. Ixxiii, figs. 2-2b. 



