io8 



Cincinnati Society of Natural History. 



2 — X. baeri Meek, 1872. 



Body of medium size, globose-obeonoidal ; under-basals 

 apparently not developed, or very small ; basals 4, short and 

 pentagonal ; first primary radials of comparatively moderate 

 size, presenting a general heptagonal outline ; second a little 

 narrower than the first, but of nearly the same length, with a 

 general quadrangular form ; third slightly larger than the 

 second and pentagonal ; secondary radials consisting of about 

 4 pieces in succession on each upper sloping side of each 

 primary radial, the first 2 or 3 of each series only about one- 

 third smaller than the second ones, while above this the suc- 

 ceeding pieces soon become much shorter, free brachials; 

 interradial pieces numerous, small, of very unequal size, 

 without any regular arrangment; anal series unknown, prob- 

 ably consisting of a mesial series irregularly arranged be- 

 tween these and the radials on each side; arms 10, rather 

 long, simple, widest a little above their bases, and then grad- 

 ually tapering to their ends, and composed of very short 

 pieces so strongly cuneiform as to appear almost to taper to 

 nothing alternately on opposite sides, while each supports a 

 pinnule at its thicker end ; pinnules very long, moderately 

 stout, nearly in contact, and composed of pieces that are 3 or 

 4 times as long as wide; surface of body plates without 

 costae or striae, those of the primary and secondary radial 

 series more prominent than the much smaller pieces filling 

 the interradial and axillary spaces, and thus forming some- 

 what flattened ridges, more or less interrupted at the sutures 

 and abruptly beveled at the sides ; interradial and axillary 

 areas roughened by a minute projection on each of the 

 little pieces filling the same; column of moderate thickness, 

 apparently quadrangular or pentagonal near the base, and 

 composed of alternate thick and thin pieces, the former pro- 

 jecting a little beyond the latter. (Am. Jour. Sci., ser. 3, 

 vol. 3, p. 260; Pal. of Ohio, vol. 1, p. 37, as Glyptocrinus) 



Locality. — Richmond, Ind., and Warren County, Ohio. 



Remarks. — There is some discrepancy in the various de- 

 scriptions of this species. Meek does not mention the num- 

 ber of basals ; Miller says there are 5 (Jour. Cin. Soc. Nat. 

 Hist., Vol. VI, p. 226); while Wachsmuth and Springer say 

 positively 4. The column is probably quadrangular. 



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