ORINOIDS. 209 



Calyx subovoid, somewhat higher than wide; plates thin; 

 infrabasals small ; basals very large, much longer than wide ; 

 radials about two-thirds the size of the basals, with small 

 articular facets. Surface smooth. 



Jlorison and localities. — Carboniferous, Upper Coal 

 Measures : Kansas City. 



Barycrinus spurius (Hall). 



Cyathocrinus spurius Hall, 185S : Geology Iowa, vol. I, p. 625, pi. xviii, figs. 



7, 8. 

 Barycrinus spurius Meek & Worthen, 1868: Proc. Acad. Nat. Sci., Phila., 



p. 340. 

 Barycrinus spurius Worthen, 1890: Geol. Sur. Illinois, vol. Vlil, p. 99, pi. 



xiv, fig. 4. 



Calyx cup-shaped, with massive plates, which are convex, 

 and depressed at the corners. Infrabasals five in number, 

 rather small, and together forming a small pentagonal disk, 

 which is nearly hidden by the heavy column. Basals very 

 large. Eadiala a little larger than the basals, unequal in 

 size ; articulating facets large, concave, and facing obliquely 

 oatward. Anal plates two, the lower one very small. 



Horizon and localities — Lower Carboniferous, Keokuk 

 limestone: Wayland (Clark county); Keokuk (Iowa). 



Barycrinus hoveyl (Hall). 



Cyathocrinus hoveyi Hall, 1861: Jour. Boston Soc. Nat. Hist, vol. VII, 



p. 293. 

 Barycrinus hoveyi Meek & Worthen, 1873: Geol. Sur. Illinois, vol. V, p. 



486, pi. xiii, fig. 1. 

 Barycrinus hlairi Miliar, 1891: Geol. Sur. Mi830uri, Bui. 4, p. 25, pi. iii, 



figs. 11-13. 



Calyx similar to that of B. spurius, but with the depressions 

 along the longitudinal sutures more pronounced. Arms of 

 medium length, rather slender, two to the ray usually, though 

 occasionally again branching. 



Horizon and localities. — Lower Carboniferous, Keokuk 

 limestone : Boonville ; Keokuk ( Iowa). 



