Ills PROCEEDINGS OF THE PALBONTOXOGTCAX SOCIETY 



the base of the Clinton, hence above the true Medina, an arrangement which 

 the present author indorses. Typical sections in New York and following 

 these the sections corresponding in general with the Medina in the Appalachian 

 Valley from central Pennsylvania to east Tennessee, in central Alabama. Ohio. 

 Indiana, and southern Illinois, were briefly discussed and the beds correlated. 

 The evidence presented by the author was believed to establish that the Clinch 

 sandstone of Tennessee is the equivalent of the Tuscarora in Pennsylvania 

 and in general also the equivalent of the upper part of the Medina, beginning 

 with the Whirlpool sandstone in New York. It was shown further that the 

 horizon of the Arthrophycus harlani is at the top in each case of the men- 

 tioned formations. It was recommended that the term Clinch be adopted in 

 place of Tuscarora throughout the Appalachian Valley for the Upper Medina, 

 and that the term Juniata should be adopted in New York as well as in Penn- 

 sylvania and perhaps elsewhere in the Appalachian Valley for the Lower 

 Medina, displacing the Qneenstown. The correlation of the Upper Medina is 

 based on an aggregate of over 75 species of fossils, a very large portion of 

 which are new. It was further recommended that the term Medina be re- 

 tained in its original significance, thus making it today a series term, equiva- 

 lent in rank to the Niagaran and divided like it into two groups. Inasmuch 

 as the Lower Medina is equivalent to the greater part, if not the whole, of the 

 Richmond, the latter name becomes the time term for the lower group and 

 ssibly Anticosti for the upper. Finally it was shown by fossil and strati- 

 graphic evidence that the typical Rockwood formation of southeastern Tennes- 

 see includes representatives of the Juniata and of all of the distinguishable 

 members of the Upper Medina in New York, but that it does not include beds 

 of Clinton age. The typical Rockwood thus corresponds to the whole of the 

 Medina and is distinctly older than the Clinton, with which it had been 

 hitherto correlated. 



At 5.15 the Society adjourned for the day. In the evening the mem- 

 bers took part in the annual dinner with the Fellows of the Geological 

 S ietv of America. 



Session of Tuesday. December 31 



Tuesday morning the Society was called to order by the President at 

 I o'clock and the Auditing Committee was called upon to report as 

 the first matter of business. This committee stated that the accounts 

 of the Treasurer were found to be correct : whereupon it was voted that 

 their report be accepted. Vice-President Ru edema nn then took the 

 chair and announced that the rest of the session would be devoted to 

 the completion of the papers on general and invertebrate paleontology 

 and stratigraphy and paleobotany. 



The following paper was then presented by the author without notes 

 and illustrated by drawings ; minutes. Discussed by R. S. Bas>ler. 

 with reply by the author and by It. S. Lull, T. C. Brown, and R. T. 

 Jackson : 



