116 HYDROZOIDS AND OORA-LS. 



Chonophyllum sedaliense White. 



Plate xiv, fig. 9. 



Chonophyllum sedaliense White, 1883: Twelfth Ann. Rep. U. S. Geol. and 

 Geog. Sur., p. 157, pi. xxxix, fig. 3a. 



" Oorallum moderately large, approximately straight, the 

 angle of divergence of its sides being quite small ; calyx ap- 

 parently rather shallow ; rays numerous ; surface rough by the 

 presence of numerous projecting, successive calyx borders, 

 and by coarse, irregular, longitudinal strite. Length probably 

 about 130 millimeters ; and the diameter of the calyx about 30 

 millimeters." ( White.) 



Sorizon and localities. — Lower Carboniferous, Chouteau 

 limestone : Sedalia. 



Columnaria stellata? (Sall). 



Plate xiii, fig. 3. 



Favistella stellata Hall, 1847: Pal. New York, vol. I, p. 275, pi. Ixxv, 



figs. la-c. 

 Columnaria stellata Rominger, 1876: Geol. Sur. Michigan, vol. Ill, pt. ii, 



p. 91, pi. xxxiv, fig. 3. 



Corallum of medium size, hemispherical or flattened 

 spheroidal. Corallites radiating from a central point, four to 

 five millimeters in diameter; lamell;© not very well defined; 

 dissepiments flat, numerous. 



Sorizon and localities. — Lower Silurian, Trenton limestone: 

 Cape Girardeau. 



Hadrophyllum glans White. 



Plate xiii, figs, lla-b. 



Zaphrentis glans White, 1862: Proc. Boston Soc. Nat. Hist., vol. IX, p, 



32. 

 Hadrophyllum glans White, 1883: U. S. Geol. and Geog. Sur. Ter., 12th 



Ann. Rept., p. 156, pi. xxxix, figs. 5a-b. 



Corallum small, somewhat globose ; base small, pointed, 

 well defined; calyx flattened or convex, with a rather well- 

 marked margin, and very oblique to the axial line. Septal fos- 

 settes three in number, the principal one quite large, rather 

 shallow, with its chief axis coinciding Vith the long diameter 



