n8 



Cincinnati Society of Natural History. 



sub-pentagonal, and of more than medium size. (Pal. of N. 

 Y., Vol. Ill, p. 104; Wachsmuth & Springer, Review of Palse- 

 ocrinoidea, Part II. [Proc. Phila. Acad. Nat. Sci. for 1881, 

 p. 115.] Compsocrinus S. A. Miller, 1883. Jour. Cin. Soc. 

 Nat. Hist., Vol. VI, p. 233.) 



Remarks. — The description above given is the amended 

 one of Wachsmuth and Springer. These writers conclude 

 that Compsocrinus is a synonym, and it is so regarded here. 

 The latter genus was made by Miller for the species previ- 

 ously described as Glyptocrijius karrisi, which is given below, 

 and which is the only one occurring in our region. The 

 other species referred to the genus are all Upper Silurian. 



1.— M. harrisi S. A. Miller (sp), 1881. 



Calyx obconoidal, with flattened interradial, intersecon- 

 dary, and intertertiary areas ; radial ridges strong, and sep- 

 arated at the sutures ; surface strongly sculptured with star- 

 like ornamentation in relief ; basals 4, 2 pentagonal and 2 

 hexagonal, each about twice as wide as high and deeply 

 sculptured; 3 primary radial 's about the same size; 2 second- 

 ary radials of equal size, and about as large as the primaries ; 

 8 tertiary radials in each series, gradually diminishing in 

 size ; 20 arms at the vault ; plates of the regular interradial 

 areas resting upon the first primary radials, followed by 2 

 plates, and above this by 2 or 3 plates in each range to the 

 top of the vault; inter secondary areas, with 1 or 2 plates in 

 each transverse series, the intertertiary plates following each 

 other in single order ; first azygous plate resting on one of 

 the 4 basals, followed by a series of rather large plates, upon 

 each side of which there are nearly as many plates as in the 

 regular interradial areas ; vault unknown ; arms with strong 

 pinnules ; column 4-sided, each side slightly concave, corners 

 rounded. (Jour. Cin. Soc. Nat. Hist., Vol. IV, p. 74, as Glyp- 

 tocrinus ; Ibid, Vol. VI, 1883, p. 234, as Compsocrinus.) 



Locality. — Waynesville, Ohio. 



Remarks. — Wachsmuth and Springer have reduced Comp- 

 socrinus to a synonym, upon the ground that Miller's diag- 

 nosis was not exactly correct, and that typical specimens 

 have all the characters of Mariacri?ius , as emended by them. 



[to be concluded.] 



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