PLATYCRINID &. 667 
Platycrinus contritus Harz and Warrr. 
Plate LX XI. Fig. 8. 
1863. Hatt and Wuitrietp; 17th Rep. N. Y. State Cab. Nat. Hist., p. 54; and 1875, Geol. Surv. of 
Ohio, Vol. I., Part II., p. 166, Plate 11, Fig. 4. 
This species we only know from the description and figure. Dorsal cup 
broad, short, concave at the base for the reception of a large column. Plates 
without ornamentation. Base one third the length of the dorsal cup, form- 
ing a sharp angle at the lower edge, and slightly projecting outward. 
Radials wider than high, somewhat spreading. Costals subpentangular, 
with short lateral faces. The distichals longer than the costals. Arms four 
to five to the ray, short, strong, and biserial.* All other parts unknown. 
Horizon and Locahty. — Shales of the Waverly group at Richfield, Summit 
Co., Ohio. 
Type in the New York State Cabinet at Albany. 
Platycrinus ollicula 8. A. Minuer.f 
1891. §. A. Mittzr; Geol. Rep. Missouri, Bull. 4, p. 19, Plate 2, Figs. 7, 8. 
From medium size to larger. Dorsal cup tub-shaped, having a wide, flat 
bottom, slightly constricted at the top of the basals, whence it expands very 
gradually upwards. Plates thick and convex; sutures beveled; surface 
finely granular. Basals stretched out horizontally, forming a disk of which 
the edges project beyond the lower ends of the radials in the form of a rim, 
the latter being the only part of the base seen in a side view. Radials a 
little longer than wide, slightly spreading, their greatest convexity below 
the facets, the lower face forming a straight line, the upper faces not notched 
at all, or very little. Facets shallow but wide, occupying more than two 
thirds the width of the plates, and facing upwards. All other parts 
unknown. 
Florizon and Locality. — Chouteau group, at Pin Hook bridge, and at 
Leucke’s quarry, near Sadalia, Mo. 
Type in the collection of Mr. Sampson. 
* The description says four arms in the three anterior rays, and five in the two posterior ones; but if the 
position of the small basal is correctly figured, the five arms do not occur in the posterior, but in the anterior 
rays. 
+ We are unable to give a figure of this species, and the description is made after Miller’s. 
