Paleontology of the Cincinnati Group. 



existed except the presence of a finely granulose texture. 

 (Advance sheet 20th Rept, N. Y. State Mus. Nat. Hist. ; 

 24th Rept.; Ibid, 1892, p. 206; Meek, Pal. of Ohio, Vol. I, p. 

 34, as Glyptocri?uis.) 



Locality. — Lebanon and Cincinnati, Ohio. 



2. — R. cognatus S. A. Miller, 1881. 



Body turbinate, strongly pentagonal, height about equal to 

 width; wider-basals 5, with a height at the superior angle 

 nearly equal to ^2 the width of a plate ; basal s 5, compara- 

 tively large, heptagonal, about as wide as high, depressed at 

 the line of junction and elevated in the central part; each 

 plate rests on 2 of the under basals, and supports on the upper 

 sloping sides the radials and on the superior face an inter- 

 radial ; first primary radial heptagonal, about as wide as high 

 and a little larger than either of the others ; second and third 

 hexagonal, higher than wide, the 3 forming a convex elevated 

 ridge; the third supports on its upper sloping sides the sec- 

 ondary radials, and on its superior face an axillary or inter- 

 secondary radial plate; about 8 of the secondary radials form 

 part of the body, gradually diminishing in length and about 

 the eighth giving rise to the free arms ; regular interradial 

 areas deeply excavated and occupied by about 40 plates, the 

 axillary areas having about 20 plates. (Jour. Cin. Soc. Nat. 

 Hist., Vol. IV, p. 75, as Glyptocriuus ; Ibid, Vol. VI, p. 229, as 

 Gaurocrinus.) 



Locality. — Middletown, Ohio. 



Remarks. — This species is considered by Mr. Miller to be a 

 close ally of R. o'nealli, 



3. — R. gracilis Wetherby, 1881. 



Body broadly ovate ; under-basals 5, very small; basals 5, 

 hexagonal, somewhat higher than wide, truncated above ; 

 outer angles of upper ends cut off, forming an articulating 

 surface for first radials ; widest at the lateral angles and 

 separating from each other below, so as to leave an opening 

 through which the under basals and top of column are seen ; 



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