io6 



Cincinnati Society of Natural History. 



a strong pinnule; column round, of medium size, and com- 

 posed, near the head, of alternately thick and thin plates. 

 (Jour. Cin. Soc. Nat. Hist., Vol. V, 1882, p. 80, as Glyptocrinus.) 



Locality. — Opposite Cincinnati, Ohio, in Kentucky. 



Remarks. — The description of this species is obscure in 

 regard to the origin of the secondary radials, and as the 

 author says his figures are incorrect, it is not possible to 

 check one by the other. 



2. — C richardsoni Wetherby, 1880. 



Under-basals not developed, or so slightly as not to be 

 characterized ; basals 5, pentagonal wider than high, alter- 

 nating with the first radicals; radials 3 X 5> in tne fi rst 

 series pentagonal, somewhat higher than wide, each elevated 

 in the center; second and third series hexagonal, higher than 

 wide, and resting squarely upon each other, as the second 

 rest upon the first, and like the first radials with a central 

 elevation; rays dividing on the third radials; interradials 

 hexagonal, and so arranged on all except the azygous side 

 that there is at first one piece, then two above this for 2 or 

 3 ranges, above which the arrangement is indefinite ; azygous 

 side has first 1 plate, then 2 in the first range, and 3 in a 

 few succeeding ranges, and then indefinite; inter axillaries 

 numerous, hexagonal or pentagonal, slightly elevated in the 

 center; before the arms become free, a number of jointed 

 processes, like large pinnules, are sent off ; arms 30 (?), com- 

 posed of nearly equal slightly cuneiform plates, long, taper- 

 ing gradually, and with elongated pinnules, which are 10 or 

 12 jointed ; column round. (Jour. Cin. Soc. Nat. Hist., Vol. II, 

 1880, p. 245, as Glyptocrinus.) 



Locality. — Wilmington, Ohio. 



Genus 3.— XENOCRINUS S. A. Miller, 1881. 



Base monocyclic ; basals 4, combined, forming a shallow 

 decagonal cup, which, upon 5 of its sides supports the 

 5 radials, and alternately, upon each of the 5 other sides, a 

 series of small interradial pieces ; all the basals different in 



8 



