CALYPTOCRINID. 337 
gate nodes. Anus at the end of a small tube, rising 4 to 5 mm. above the 
tips of the arms. Ventral part of the calyx not visible in any of the speci- 
mens. Column round, the nodal joints very long and rounded at the outer 
margins, the younger joints short and narrow. 
Horizon and Locality. — Niagara group ; Lockport and Rochester, N. Y. 
Type specimen in American Museum of Natural History, New York. 
Remarks. — It is probable that the specimens which Hall referred to 
Eucalyptocrinus decorus Phillips, are identical with this species. They cer- 
tainly differ essentially from the English species (Plate LXXXII., Fig. 15), 
which is proportionally shorter and stouter, the plates heavier and more con- 
vex, the partition walls thinner, the anal tube stronger, and the column 
obscurely pentangular instead of round. 
The Waldron specimens with ornamented plates, which Hall identified 
with this species, have been referred by us to Eucalyptocrinus Elrodi Miller. 
Eucalyptocrinus tuberculatus Miturr anp Dyer. 
Plate LXXXIUTI. Figs. 8, 9, 10. 
1878. Muirrer and Dyrr; Journ. Cincin. Soc. Nat. Hist., Vol. I., p. 36, Plate 2, Figs. 9, 9a. 
1885. W.and Spe.; Revision Paleocr., Part IIIL., p. 134. 
Syn. Zucalyptocrinus muralis RincurBerc ; 1890, Annals N. Y. Acad. Sci., Vol. V., p. 305, Plate 
3, Fig. 3. 
In its general form resembling the preceding species, but differing some- 
what in the proportions of the plates. Dorsal cup obconical, nearly as high 
as wide, sides slightly convex, the lower end moderately truncated. Plates 
a little elevated and covered by numerous tubercles of various size, larger 
ones being interspersed between smaller ones; the suture lines distinctly 
grooved. Columnar concavity narrow, its depth less than the width; the 
basals completely covered by the upper end of the column. 
Radials considerably longer than wide, rapidly tapering downward, 
rounded at the bottom; the lower end inflected to meet the basals; the 
lower face very narrow, equal to one third the width of the upper, which is 
rather deeply concave ; the sloping upper faces short. First costals longer 
than wide, narrowest at the upper end. Second costals wider than the first, 
pentangular or hexangular. First distichals from one third to one half 
smaller than the costals; the second barely one third the size of the first ; 
the arm-bearing palmars very much smaller and triangular. First. inter- 
brachials elongate, once and a half as long as wide, and nearly as large 
43 
