CALYPTOCRINID.E. 353 



twice as long as wide, occupying full}- 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 Localittj. — Niagara group; Pontiac, 0. 



Bemarks. — Miller described this species from a plaster cast in the pos- 

 session of Mr. A. McCord of Oxford, Butler Co., 0. 



Eucalyptocrinus obconicus Hall. 

 Plate LXXXIIL, Fig. 13. 



1867. Hall; SOth Rep. N. Y. State Museum Nat. Hist., p. 323, Plate 11, Fig. 1. 

 1885. W. and Sp. ; Revision Palseocr., Part III., p. 133. 



Differing from all other American species of tliis 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. Eadials 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 Locali/y. — Kingara group; Racine, Wise, and Chicago, Ills. 



CALLICRINUS i.'Orbigny. 



1850. D'Okbignt {Calliocrinus); Prodrome, Vol. I., p. 45. 



1878. Angelin; Icouogr. Crin. Suec, p. 14. 



1879. Zittel; Handb. d. Palaeont., Vol. I., p. 378. 



1881. W. and Sp. ; Revision Pateocr., Part III., p. 13,-, (Proceed. Acad. Kat. Sci. Pliila., p. 357). 

 1890. RiNGCEBEnG; Annals N. Y. Acad. Sci., Vol. Y., p. 302. 



Sjn. Eugeniaeriiiiles Hisingek (not J. S. Miller), 1857, LetliKa Sure, p. 80. 



Syn. Eucalyptocrinus (in part) Hall; N. Y. State Mus. Nat. Hist., p. 322 (20lli Rep). 



In its general aspect, in the form of the calyx and arrangement of the 

 plates, closely resembling Eucali/'ptocrinns. The calyx also lias 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 



45 



