340 THE CRINOIDEA CAMERATA OF NORTH AMERICA. 



narrow at the extremities, composed of very short pieces ; the three or four 

 proximal ones simple, the upper rather deeply interlocking. Ventral disk 

 minus the partitions comparatively high, owing to the plates of the first row 

 which are unusually large ; the plates of the second row are shallow funnel- 

 shaped, and those of the third shorter and very heavy. The plates of the 

 fourth row, which form the upper end of the tube, as w^ell as of the com- 

 partments, enclose six or eight moderately large plates, and these again 

 a little short cone of eight or ten irregular pieces, which decrease in size 

 inward, and close the anus more or less tightly. 



Horizon and Locality, — Niagara group ; Waldron and Hartsville, Ind., 

 and Chicago, Ills. 



Types in the State Cabinet of Natural History at Albany. 



Remarhs. — The name JEucali/ptocrinus Elrodi was proposed by Miller for 

 a specimen from Hartsville, Ind., in which the nodes upon the surface are 

 exceedingly regular, and not in part confluent as usually in this species, 

 agreeing in other respects with the specimens from Waldron, which Hall 

 erroneously referred to E. ccelatus. The latter species, as represented at 

 Lockport and Rochester, N. Y., its typical localities, is much more elongate 

 than the specimens from Indiana ; the dorsal cup is higher and obconical, the 

 radials longer and more nodose at the lower end, the partition walls thinner, 

 their outer edges convex instead of concave, and there is a small tube rising 

 above the walls of the compartments. Whether under these circumstances 

 it is proper to accept for the typical form Miller's name E. Elrodi, which he 

 separated from it on account of slight modifications in the ornamentation^ 

 may be questioned ; but we propose to do so to avoid further synonomy. 

 We therefore include in this species not only Miller's special form, but also 

 the specimens from Waldron and Hartsville, figured by Hall under E. ccelatns, 

 and also Miller's E, subglohosus, which latter we regard an immature form 

 of this species. 



Eucalyptocrinus ornatus Hall. 

 Plate LXXXIL Fig. 10. 



1867. Hall; 20tli Rep. N. Y. State Cab. Nat. Hist., p. 339, Plate 1], Figs. 4 and 5. 

 1885. W. and Sp. ; Revision Palseocr., Part III., p. 134. 



The dorsal cup, the only part known of this species, was described from 

 internal casts and gutta percha impressions, taken in the natural mould of 

 the exterior. It is depressed, as wide as high, the radials directed hori- 



