350 THE CRINOIDEA CAMERATA OF NORTH AMERICA. 
Types in the collection of W. C. Egan, Esq., of Chicago. 
Remarks. — This species differs from all preceding ones in the depressed 
form of the dorsal cup, the width and depth of the basal concavity, and the 
position of the radials which are almost at right angles to the plates of the 
upper end. It was originally described from natural casts, but Mr. Egan 
has since obtained from the same locality a specimen with the plates intact, 
from which our description is made. 
Doubtful species described from natural casts.* 
Eucalyptocrinus splendidus (Troost) Haun and Wurrrierp. 
1848. Troost ; List Crin. Tenn., Proceed. Amer. Assoc. Ady. Sci., p. 60 (without description). 
1875. Hawn and Wuirrietp: Geol. Surv. of Ohio, Paleont., Vol. II, p. 128, Plate 6, Fig. 12. 
Closely allied to the preceding species, and perhaps identical with it. 
As in that species, the general form is subcylindrical, flattened at both ends, 
the arms are twice as long as the dorsal cup, and the radials are not seen in 
a side view, or only their extreme upper ends; the disk, however, to judge 
from the cast, is proportionally shorter, and the first costals are higher. The 
basal concavity cannot be seen in the specimen, but must have included the 
preater part, if not the whole, of the radials. First costals quadrangular, 
nearly as long as wide; the apex of the second slightly truncated by the 
interdistichal; the distichals considerably smaller than the costals; the first 
interbrachial large, a little longer than wide. The proportions of the other 
plates indeterminable. Disk hemispherical, the tubular canal in the cast as 
long as the rest of the calyx, and funnel-shaped at the upper end. 
Horizon and Locality. — Niagara group; Springfield, O. 
Type in the collection of Professor Orton. 
Eucalyptocrinus rotundus S$. A. Miter. 
1882. §. A. Mitrer; Journ. Cincin. Soc. Nat. Hist., Vol. V., p. 82, Plate 3, Figs. 4 and 4 a, b,c. 
Of small size. Crown globose. The inner cavity of the calyx, as seen 
in the cast, much wider than high, the canal within the neck wide and of 
nearly uniform width. Dorsal cup low-saucer shaped; the basal concavity 
small, and apparently filled completely by the upper joints of the column. 
Radials wider than long, the upper face concave. First costals twice as wide 
* We are willing to admit that most of these forms differ specifically from one another, but we are 
unable to see how the casts can be satisfactorily compared with species described from the test, especially in 
a genus like Lucalyptocrinus in which the differentiations are but very slight. 
