POLYZOA.NS. 



Synocladia biseridis White, 3884 : Geol. Sur. Indiana, 13th Ann. Rept. % pt. 



II, p. 138, pi. xxv, figs. 11-13. 



Synocladia biserialis Keyes, 1888 : Proc. Acad. Nat. Sci., Phila. , p. 225. 

 Septopora biserialis Ulricb, 1890: Geol. Sur. Illinois, vol. VIII, p. 631, pi. 

 Ivi, tig, 11. 



Zoarinm large, obconical, more or less irregular, usually 

 folded; branches subequal, nearly parallel, united at regular 

 intervals by lateral projections. Fenestrules usually more or 

 less distinctly crescentic in shape. Zocecial openings small, 

 rather numerous. 



Horizon and localities. Upper Carboniferous, Lower Coal 

 Measures : Des Moines (Iowa); Upper Coal Measures: Kan- 

 sas City. 



Diplopora bifurcata ULRICH. 



Diplopora bifurcata Ulrich, 1890: Geol. Sur. Illinois, vol. VIII, p. 637, 

 pi. Ixii, figs. 12-12a. 



Horizon and localities. Lower Carboniferous, Kaskaskia 

 limestone : Chester ( Illinois ). 



Sphrogropora parasitica ULRICH. 



Sphrogropora parasitica Ulrich, 1890: Geol. Sur. Illinois, vol. VIII, pi. 



Ixv, figs. 6-6a. 



Horizon and localities Lower Carboniferous, Kaskaskia 

 limestone: Chester (Illinois). 



Rhombopora dichotoma ULRICH. 



Rhombopora dichotoma Ulrich, 1890: Geol. Sur. Illinois, vol. VIII, p. 650, 

 pi. Ixx, figs. 13-13b. 



Horizon and localities. Lower Carboniferous, Burlington 

 limestone: Hannibal?; Burlington (Iowa). 



Rhombopora varians ULRICH. 



Rhombopora varians Ulrich, 1890: Geol. Sur. Illinois, vol. VIII, p. 652, 

 pi. Ixxi, figs. 1-lb. 



Horizon and localities. Lower Carboniferous, Keokuk 

 limestone: Warsaw (Illinois). 



