230 Neiv Sjjecies of Fossils from Ohio. 



Black Shales and other beds coming above these thin limestones 

 in central Ohio, as equivalent to the Genesee Slates and succeed- 

 ing formations of New York.* 



The following lists, prepared by E. and H. Hyatt, of Columbus, 

 Ohio, are from the limestones within 24 miles of that place. 

 Those of the first list are from below the horizon of the " Bone- 

 bed," and the next from above; StropJiomena rliomhoidalis being 

 the only species fully recognized from both horizons. All spe- 

 cies have been collected by them from known horizons, or have 

 been seen from the beds by myself. 



Species fkom below the ''Bone-bed." 



PROTOZOA. 



Stromatopora, De Blainville. 



C. gramdosa, Nich. 



S. nodulata, Nich. 



S. ponderosa, Nich. 



>S'. Sandushyensis, Rominger. 



S. suhstricdella, Nich. 

 Caj^nopora, Phillips. 



C. columnaris, Nich. 



C. densa, Nich. 

 Keceptaculites, De France. 



R. Devonicus, Whitf. 

 RADIATA. 



Favosites, Lamarck. 



* Since writing the above remarks, Vol. 5 of the Palaaont. of New York has been published. 

 In it the author has, on page 139, some remarks on the limestones at the Falls of the Ohio, and 

 their relations to the Hamilton group of New York. After showing that the Hydraulic-cement 

 beds of the Falls of the Ohio are the equivalents of the Hamilton group of New York (which 

 had already been stated in the Geol. Kept. Ind., 1875, pp. 147, 148, and also shown in sections 

 on page 157), the author remarks, " In the State of Ohio, similar conditions may be inferred, 

 from the fact that certain known species of Hamilton fossils are published in the Ohio Geolo- 

 gical Reports as from the Corniferous group." At the meeting of the Am. Assoc, for the Ad- 

 vancement of Science, at Saratoga, August 1879, I read a notice of the occurrence in Ohio of 

 rocks representing the Marcellus shales of New York, in which it was shown that a considera- 

 ble thickness of the limestones previously recognized as "Corniferous " in Ohio, were above 

 the horizon of the beds which I had recognized, from palseontological and liihological evi- 

 dence, as of the age of the Marcellus shale, and would be of necessity equivalents of the 

 Hamilton group. 



