34 University Geological Survey of Kansas. 



Range and distribution : Upper Goal Measures ; Topeka, 

 horizon of the Osage coal. 



On account of the general resemblance of this species to some 

 of the species of Ceriocrinus , it is left there for the present, un- 

 til the azygous plates and infrabasals can be determined. 



Ceriocrinus hemisphericus. Plate VI, figs. 5, 5b. 



Poterincrinus hemisphericus Shumard, Trans. St. L. Acad. Sci., i, p. 221, 



( 1858.) 

 Scaphiocrinusf hemisphericus Meek, Fin. Rep. U. S. Geol. Surv. Neb., 



p. 147, pi. v, ff. la, b, pi. vn, ft', la-c, (1872); Meek and Worthen, Geol. 



Surv. 111., v, p. 561, pi. xxiv, f. 5, (1873). 

 Ceriocrinus hemisphericus Keyes, Geol. Surv. Mo., iv, p. 220, pi. xxviii, 



ff. 2,5, (1894). 



Meek's description : "Body below the summit of the radials 

 subhemispherical, with the under side deeply concave. Base 

 very small, pushed or inverted entirely within the cavity of the 

 body, and nearhy or quite hidden externally ; column facet 

 round and deeply sunken. Radials of moderate size, very 

 nearly equal, having a general pentagonal form, excepting on 

 the anal side which is a little truncated above by the anal 

 piece so as to give it a general hexagonal outline ; each, how- 

 ever, has an additional very obscure mesial angle at its connec- 

 tion with the base, and all are strongly incurved below to form 

 the concavity of the under side. Radials nearly twice as large 

 as the basals, twice as wide as high, and equally pentagonal, 

 the upper side being longer than any of the others and all 

 evenly truncated. Costals (at least the two on the anal side) 

 comparatively narrow, but still wider at the base than high, 

 rounded on the outer side, a little constricted in the middle, and 

 pentagonal in form, the two upper sloping sides supporting the 

 first divisions of the arms, which are composed (at least for the 

 first three ranges) each of a single series of wedge-formed pieces. 

 First anal piece comparatively small, a little concave, resting 

 upon one of the basals and connecting with the radials on each 

 side, above which it projects, supporting upon its slightly in- 

 curved upper edge a second piece, the form of which is unknown. 

 Surface smooth, or only with traces of minute granules." 



Range and distribution : Upper Coal Measures ; Jefferson 

 county. Now in the collection of Washburn College. 



