216 CRINOIDS. 



Hydreionocrinus mucrospinus (McChesney). 



Zeacrinus mucrospinus McChesney, 1859: Desc. New Pal. Foss, p. 10. 

 Zeacfinus mucrospinus McChesney, 1867: Trans. Chicago Acad. Scl., vol. 



I, p. 7, pi. iv, fig. 7. 

 Hydreionocrinus mucrospinus Wachsmuth & Springer, 1879 : Proc. Acad. 



Nat. Sci., Phila. ( Revision, p. 131). 



The Missouri specimens are known only from loose plates. 

 Horizon and localities. — Upper Carboniferous, Upper Coal 

 Measures : Kansas City. 



Cromyocrinus globosus (Worthen). 



Agassizocrinus globosus Worthen, 1873: Geol. Sur. Illinois, vol. V, p. 557, 



pi. xxi, figs. 1-4. 

 Cromyocrinus globosus Wachsmuth & Springer, 1886: Proc. Acad. Nat. 



Sci., Phila., p. 248. 



Calyx globose, plates heavy ; infrabasals large. Anal open- 

 ing toward the upper end of a short ventral protuberance. 

 Otherwise much like Eupachycrinus. 



Horizon and localities. — Lower Carboniferous, Kaskas- 

 kia limestone : Chester ( Illinois ). 



Cromyocrinus buttsi ( Miller & Gurley ). 



JJlocrinus buttsi Miller & Gurley, 1890: Jour. Cincinnati Soc. Nat. Hist., 

 vol. Xril, p. 7, pi. i, figs. 5-6. (Reprint, p. 7). 



Calyx large, somewhat higher than broad; plates heavy, 

 convex, granulose. 



Horizon and localities — Upper Carboniferous, Upper 

 Coal Measures : Kansas City. 



Cromyocrinus kansasensis (Miller & Gurley). 



Plate xxlv, fig. 7. 



JJlocrinus kansasensis Miller & Gurley, 1890: Jour. Cincinnati Soc. Nat. 

 Hist., vol. XIII, p. 8, pi. 1, figs. 7-10. ( Reprint, p. 8.) 



Calyx subglobose; infrabasals large, extending beyond the 

 border of the column, forming a low saucer-shaped disk, slightly 

 concave centrally, for the reception of the column ; basals 

 about as high as wide, three of them hexagonal, the two pos- 

 terior ones heptagonal, slightly larger; radials not quite so 

 large as the basals, the lateral faces very short ; the right pos- 



