ABSTRACTS OF -PAPERS 203 



referable to the genus Archwoscyphia Hinde. The base of the series is not 

 exposed, and it is disconformably succeeded by Coal Measures strata, the 

 Machiakou or Actinoceras limestone being absent here. Three horizons are 

 recognizable in this lower series, but their relation to the Yehli limestone is 

 not yet clear. So far, there have been recognized in the Ordovicic rocks of 

 north China 31 genera and 58 species, 45 of these being specifically identified. 

 All except five of these are new. Three new genera and one new family have 

 been obtained. 



The meeting then adjourned for luncheon. 



PRESIDENTIAL ADDRESS 



At 2.30 the Society met to hear the address of the retiring President 

 of the Paleontological Society, entitled 



SOME PROBLEMS CONNECTED WITH THE DAKOTA SANDSTONE 

 PRESIDENTIAL ADDRESS BY T. W. STANTON 



The reading of papers before the Society in general session was then 

 resumed;, the first of the afternoon session being an account of the sup- 

 plementary work upon the bibliographic catalogue of North American 

 fossil vertebrates, including its plan, stage of completion, and prospect 

 of its publication. 



SUPPLEMENT TO THE BIBLIOGRAPHY AND CATALOGUE OF THE FOSSIL 

 VERTEBRATES OF NORTH AMERICA 



BY 0. P. HAY 



In the discussion which followed this paper it was voted unanimously 

 by the members that representation be made to the Director of the U. S. 

 Geological Survey to the effect that it was the hope of the Paleontological 

 Society that Dr. Hay's catalogue be published as speedily as practicable. 



Following this discussion the members interested in vertebrate paleon- 

 tology retired to an adjoining room to meet in special session for the 

 consideration of their more technical papers. 



In the general session papers upon paleobotanical subjects were then 

 read. The first two, bearing upon Cenozoic floras, were combined by the 

 author, who gave an idea of the paleobotanic work carried on by him 

 under the auspices of the Carnegie Institution. 



FLORA OF THE PAYETTE FORMATION 

 BY RALPH W. CHANEY 



{Abstract) 



The flora of the Payette formation was originally considered to be of Mio- 

 cene age, but in recent years it has been referred to the Upper Eocene because 



