126 Cincinnati Society of Natural History 



at the margin being quite abrupt. The central part, around the 

 base of the column, is depressed, so that the remainder may be 

 described as a sort of moderately elevated ring. The plates along 

 the crest of this ring are separated by two, sometimes three plates 

 of smaller size from the central column, as in Lichenocrimis cra- 

 teriformis, from the Eden beds at Cincinnati, but the plates along 

 the crest are relatively not as large nor as regularly arranged as 

 in that species. The greatest specific difference, however, is pre- 

 sented by the plates lying between those along the crest of the 

 ring and the basal margin. Of these there may roughly be said 

 to be about two sets, although as a matter of fact all of the plates 

 of this attachment base are quite irregularly arranged. Both of the 

 sets of plates just mentioned are approximately of the same size 

 as those along the crest, differing in this respect conspicuously 

 from Lichenocrinus crateriformis. There is no regular series of 

 plates along the crest of the ring, but keeping as nearly along a 

 continuous line as possible, about twenty plates may be said to 

 form this line. The average diameter of the larger plates is about 

 three-quarters of a millimeter, although single plates a millimeter 

 in diameter occur. No ornamentation of the plates was noted. 



6 — Constellaria emaciata, Ulrich and Bassler. (Plate I, Fig. 

 1) — Specimens resembling this species occur in the cut south of 

 Rogers Gap, within 15 feet above the station, also in the railroad 

 cuts 59.1 and 58.9 miles from Ludlow. The species is charac- 

 teristic of the Greendale division of the Catheys. No species of 

 Constellaria has been cited so far from the Economy or Southgate 

 divisions of the Eden at Cincinnati. 



7 — Crepipora venusta, Ulrich. This species is found at Rogers 

 Gap within 15 feet above the level of the railroad station ; also 

 at various localities northward, but only the record of its occur- 

 rence at the railroad cut 54.2 miles from Ludlow is preserved. 

 The species was described from the lower or Economy division 

 of the Eden, but closely similar forms are known to occur along 

 the Ohio river in strata below the level of the Fulton bed. 



8 — Heterotrypa foerstei, Nickles. This species occurs at var- 

 ious localities near Rogers Gap and Sadieville, but only the record 



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