234 New S^Jccies of Fossils froiii Oliio. 



these somewliat hurried observations at a localit}^ about six miles 

 N. W. of Columbus, in Perry township, on the east bank of the 

 Scioto River, we accidentally discovered a thin bed of dark brown 

 shale, somewhat fissile and bituminous in character, in what 

 Prof. Orton had considered as a representative of the Delaware 

 limestone of Delaware, Ohio. The peculiar texture of the shales, 

 occurring where I had expected only a light-colored limestone, 

 excited my interest ; and after a few minutes' examination, I 

 discovered that they contain numerous flattened shells of Leio- 

 rliy melius limitaris, Vanuxem. I also obtained from them two 

 specimens of Discina minuta, and examples of Lingula Manni, 

 Hall; the two foi'mer bsing well-known and characteristic forms 

 of the Marcellus shales of New York. On examination, we 

 found that these shells, especially the Leiorliyncliiis, extended 

 through a thickness of several feet of the rock, and that the 

 peculiar bituminous character of the shale accompanied them, 

 but with intercalations of thin layers of less bituminous and 

 lighter-colored limestones. Subsequently, at a point nearly op- 

 posite Dublin, Ohio, some miles north of the above-mentioned 

 locality, the same shale was again recognized in a corresponding 

 horizon, accompanied by the same species , the Leiorliynclius 

 being quite numerous. At a subsequent visit, Mr. Edward 

 Hyatt obtained Discina Lodensis, Hall, another New York 

 MarceHus species. At this second locality, immediately above 

 the shale, and while the limestone layers retain much of the 

 bituminous character, the layers become thicker and more calca- 

 reous, and their surfaces are covered with the shells of Spirifera 

 gregaria, Glapp, and Tentaculites scalar if ormis, Hall, both of 

 which are likewise common in the blue limestone layers at Dela- 

 ware, Ohio. 



A section of the rocks at the first-mentioned locality, six miles 

 N. W. of Columbus, on the east bank of the Scioto, subsequently 

 furnished by Prof. Orton, is as follows : 



The lower bed. No. 1 of section, is a heavy-bedded limestone, 

 about thirty feet thick, representing the Columbus quarries, in- 

 cluding the coral beds and those containing the large cephalo- 

 pods. (Lower Corniferous of the Ohio Geol. Kept.) 



No. 2, a thin layer of limestone, four to six inches thick. 



