112 PROCEEDINGS OF THE PHILADELPHIA MEETING 



TITLES AND ABSTPtACTS OF PAPERS PRESENTED BEFORE THE SECOND SECTION 



On Thursday nioruing the Second Section continued the reading of 

 papers, meeting in conjunction with the Paleontological Society, as 

 follows : 



DEVONIAN OF CENTRAL MISSOURI 

 BY E. B. BRANSON AND n. K. GREGER 



(Abstract) 



The Devonian of central Missouri consists of five thin formations. The 

 lowest of these, which occurs in the eastern part of central Missouri, contains 

 a fauna closely related to that of the Jeffersonville limestone of Indiana. In the 

 western part of the area a thin formation of about the same age contains no 

 species in common with the eastern formation, but bears a fauna closely re- 

 lated to that of the Otis beds of Iowa. The Callaway limestone lies uncon- 

 formably on botli formations and is followed in the western part of the area 

 by the Craghead Creek shale, and both formations bear faunas similar to those 

 of the Upper Devonian of Iowa. In northeastern Missouri the formation 

 bearing the Jeffersonville fauna is succeeded by a thin black shale, the main 

 fauna of which consists of lingulas and dinichthyids. 



Presented in abstract extemporaneously by the senior author. 

 Discussed by Messrs. Schuchert and Savage, with replies by Professor 

 Branson. 



On account of their connection with the black shale problem, Professor 

 Orabau was requested at this point to give two papers listed under the 

 Paleontological Society's program. 



OLENTANGY SHALE OF CENTRAL OHIO AND ITS STRATIGRAPHW 



SIGNIFICANCE 



BY AMADEUS W. GRABAU 



(Abstract) 



In its typical localities the Olentangy shale is intimately associated with 

 the Huron shale, this latter representing merely a change in facies. without 

 interruption of stratigraphic continuity. The Olentangy clearly belongs to the 

 Upper Devonic. resting disconformably on limestones of Lower Hamilton age. 

 I'he shales and limestones classed as Olentangy in northern Ohio are, how- 

 ever, early Hamilton, and considerably older than the Olentangy. This name 

 should therefore not be used for strata of Hamilton age, but instead the name 

 Trout series is proposed for the northern Ohio deposits of Hamilton age. 



Presented in abstract extemporaneously. 



