POLYZOANS. 37 



Cyclopora expatiata ULRICH. 



Cydopora expatiata Ulrich, 1890 : GeoJ. Sur. Illinois, vol. VIII, p. 673, pi. 

 Ixviii, figs. 4-4d. 



Horizon and localities. Lower Carboniferous, Keokuk 

 limestone : Warsaw ( Illinois ). 



Proutella discoidea (PROUT). 



Cydopora discoidea Prout, 1860: Trans. St. Louis Acad. Sci., vol. I, 



p. 578. 

 Cydopora discoidea Prout, 1866: Geol. Sur. Illinois, vol. IE, p. 420, pi. 



xxii, figs 10-10a. 

 Proutella discoidea Uirhh, 1890: Geol. Sur. Illinois, vol. VIII, p. 674, pi. 



Ixix, figs. 4 4d. 



Horizon and localities. Lower Carboniferous, Keokuk 

 limestone : Keokuk ( Iowa ). 



Cycloporella spinifera ULRICH. 



Cycloporella spinifera Ulrich, 1890: Geol. Sur. Illinois, vol. VIII, p. 675, 

 pi. Ixix, figs. 1-lc. 



Horizon and localities. Lower Carboniferous, Keokuk 

 limestone : Warsaw ( Illinois). 



Cycloporella perversa ULRICH. 



Cycloporella perversa Ulrich, 1890: Geol. Sur. Illinois, vol. VIII, p. 676, 

 pi. Ixix, figs. 3-3b. 



Horizon and localities. Lower Carboniferous, Keokuk 

 limestone: Bentonsport (Iowa). 



