CALYPTOCRINIDZ. 353 
twice as long as wide, occupying fully one half the length of the dorsal cup. 
The tube in its free state was covered by large hexagonal plates, very 
regularly arranged. 
Horizon and Locality. — Niagara group ; Pontiac, O. 
Remarks. — Miller described this species from a plaster cast in the pos- 
session of Mr. A. McCord of Oxford, Butler Co., O. 
Eucalyptocrinus obconicus Hatt. 
Plate LXXXIII., Fig. 13. 
1867. Haz; 20th Rep. N. Y. State Museum Nat. Hist., p. 823, Plate 11, Fig. 1. 
1885. W. and Sp.; Revision Paleocr., Part III., p. 133. 
Differing from all other American species of this genus in the arrange- 
ment of the basals, which form an obconical cup instead of being placed 
within a concavity. Dorsal cup very long, sometimes almost twice as high 
as wide, sharply pointed at the lower end, the sides straight to near the top, 
where they slightly contract. Radials once and a half as long as wide, but 
very little tapering, the sloping upper faces quite small. First costals 
quadrangular, as long as wide, the upper face narrower than the lower; the 
second costals of about the same size as the first, but pentangular. First 
distichals comparatively large, those of the same ray in contact laterally ; 
the second very small. First interbrachials nearly twice as long as wide, 
widest at midway; the two of the second row shorter. Interdistichals 
unusually small, resting upon the sloping upper faces of the first distichals. 
All other parts unknown. 
Horizon and Locality. — Niagara group; Racine, Wisc., and Chicago, Ills. 
CALLICRINUS p’Orsreny. 
1850. D’Orsieny (Calliocrinus); Prodréme, Vol. I., p. 45. 
1878. Ancexin; Iconogr. Crin. Suec., p. 14. 
1879. Zirter; Handb. d. Paleont., Vol. I., p. 378. 
1881. W. and Sp. ; Revision Paleocr., Part ITI., p. 185 (Proceed. Acad. Nat. Sci. Phila. p. 357). 
1890. Rixcuesere; Annals N. Y. Acad. Sci., Vol. V., p. 302. 
Syn. Eugeniacrinites HistncEr (not J. S. Miller), 1857, Lethewa Suee., p. 86. 
Syn. Eucalyptocrinus (in part) Hain; N. Y. State Mus. Nat. Hist., p. 322 (20th Rep.). 
In its general aspect, in the form of the calyx and arrangement of the 
plates, closely resembling Lucalyptocrinus. The calyx also has the form of 
a wine bottle with long slender neck, and a deep concavity at the bottom ; 
but the partition walls, instead of forming closed compartments to the full 
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