156 PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



DEVONIAN OF CENTRAL MISSOURI 

 BY E. B. BRANSON AND D. K. GKEGOB 



Next was presented by the autlior, illustrated by diagram, the foliuw- 

 iug paper of the Paleontological Society's program ; 30 minutes. 



OLENTANOY SHALE OF CENTRAL OHIO AND ITS STRATIORAPHIC 



SIGNIFICANCE 



BY A. W. GBABAU 



(Abstract) 



lu its typical localities the Olentaugy shale is intimately associated with the 

 Hurou shale, this latter represeiitiug merely a change in faoies, without inter- 

 ruption of stray graphic continuity. The Olentaugy clearly belongs to the 

 Upper Devonic, resting discouformably on limestones of Lower Hamilton age. 

 The shales and limestones now classed as Olentaugy in northern Ohio are. 

 however, early Hamilton, and considerably older than the Olentaugy. This 

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

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



This concluded the series of black shale papers and a general discus- 

 sion followed, in which Messrs. Branson, Gushing, Foerste, Grabau, 

 Kindle, Prosser, Savage, Schuchert, David White, I. C. White, and M. Y. 

 Williams took part. 



There was then presented by the author a stratigraphic paper, illus- 

 trated by lantern slides and diagrams; 30 minutes. Discussed by Charles 

 Schuchert and Gilbert Van Ingen. 



GEOLOOICAL RECONNAISSANCE OF PORTO RICO 

 BY CHASLES P. BEBKEY 



The last paper of Group B was presented by the author and illustrated 

 by lantern slides ; 15 minutes. 



RELATIONS OF CRETACEOUS FORMATIONS TO THE ROCKY MOUNTAINS IN 



COLORADO AND NEW MEXICO 



BY WILLIS T. T.F.R 



By previous arrangement the two sections of the Society met in gen- 

 eral session at 12.30, when matters of business relating to the next meet- 

 ing place, etcetera, were discussed. 



In closing the session, the splendid arrangements to make the Society's 

 Philadelphia meeting a pleasant one were also discussed, and the Secre- 



