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666 THE CRINOIDEA CAMERATA OF NORTH AMERICA. 
Platycrinus lodensis Haut and Wuirr. 
Plate LXXI. Fig. 6. 
1875. Hatt and Wuitrietp; Geol. Rep. Ohio, Vol. IL., Part II., p. 168, Plate 11, Fig. 3. 
1881. W.and Sp.; Revision, Part II., p. 72 (Proceed. Acad. Nat. Sci. Phila., p. 246). 
Of medium size. Dorsal cup deeply cup-shaped, the sides almost par- 
allel; the plates thin and without ornamentation; the suture lines not 
grooved. 
Basals placed almost horizontally, forming a very shallow, saucer-shaped 
pentangular disk, with a slightly projecting column facet. Radials rather 
large, their height equal to the width or slightly exceeding it; their sides 
almost parallel, thickened toward the facets, the upper faces a little sloping 
at the ends, and forming a small notch. Radial facets deeply excavated to 
fully two thirds the width of the plates. Costals trigonal, the lower face 
distinctly convex. Distichals two; the first resting completely within the 
| facet, once and a half as wide as long; the second a little wider, and free at ) 
| the outer side, but suturally connected with its fellow of the same ray; the | 
| upper angle obtuse, supporting two arms, making four to the ray. Arms ! 
proportionally long and heavy throughout their full length, rounded on the | 
back and sides. They are composed from the second or third plate up of a : | 
| 
} 
double series of short, transverse pieces. Structure of ventral disk unknown. 
Columnar joints very slightly elliptic. 
| Horizon and Locality. — Cuyahoga shales, Waverly group, at Lodi, Medina | 
| Co., and at Royalton, Ohio. | 
| Type at Columbia College, New York. 
Remarks. —The form and size of the distichals are not correctly repre- 
sented in Hall and Whitfield’s figure, and were changed in our figure from a 
specimen in our collection. 
