Piotor^oa of the Cincinnati Gro?tp. 249 



gonal or hexagonal plates, one line or less in diameter : diameter 

 of fossil from one-half to one and one-quarter inch. 



Locality : Cincinnati, O. ; Maysville, Ky. 



The form described as F. claudii is apparently a young and 

 small specimen, without the circular depression. 



(ienus 5. ISCHADITES, Murchison. 1839. Siluria, p. 697. 



LcpidoUtcs, Ulrich. 1879. Jour. Cin. Soc. Nat. His., vol. 

 II., p. 20. 



Ovate, conical or cylindrical, often compressed; outer sur- 

 face, with plates arranged in concentric, intersecting lines, like the 

 engine turning on a watch case. 



I. DiCKHAUTi, Ulrich. J. F.James, J. C. S. N. H., VIII., 

 p. 163. 



LcpidoUtcs dickliaiiti, Ulrich. 1879. Jour. Cin. Soc. Nat. 

 Hist., vol. II., p. 21, pi. 7, figs. 17, 17 (7 and /'. 



L. elongatus^ Ulrich. 1879. Ibid, II., p. 22, pi. 7, fig. 16. 



Compressed from a spherical or sub-pynform body, with lower 

 portion indented; plates imbricated, about three times as long as 

 wide, with widest end round, exposed, and arranged in concentric, 

 intersecting lines. 



Locality: Covington, Ky., about 150 feet above low water 

 mark. 



Genus 6. RECEPTACULITES, De France. 1S27. Diet. 

 Sci. Nat., t. 45, atlas; p. 68. 



Auojiialoides, Ulrich. 1878. Jour. Cm. Soc. Nat. Hist., vol. 

 I., p. 92. 



Hollow, sometimes cup-shaped, with plates radiating in curved 

 lines as in Ischaditr.s ; numerous cylindrical bodies between the 

 outer plates and the inner, thin, expansion, 



R. RKTicuLATUS, Ulrich. J. F. James, Jour. Cin. Soc. Nat. 

 Hist., vol. VIII. , p. 165, 



Anoiiialoidcs reficiilafiis, Ulrich. 1878. J. C. S. N. H. , vol. 

 I., p. 92, pi. 4, figs. 6, 6 a b. 



Compressed, hollow ; formed mainly of elongated, cylindrical 

 bodies, sharp at the inner and rounded at the outer ends ; arranged 

 in intersecting lines. 



Locality : Covington, Ky. 



This and the preceding species were long of uncertain posi- 

 tion. There seems little doubt but that they are here referred to 



