IV BL'LLETIX OF THE GEOLOGICAL SOCIETY OF AMERICA 



Page 

 Proceedings of the Fifteenth Annual Meeting, lield at Washington, D. C, 

 December 30 and 31, 1902, and January 1 and 2, 1903, inchiding Proceedings 

 of the Fourth Annual Meeting of the Cordilleran Section, held at San Fran- 

 cisco, December 30 and 31, 1902; Herman Le Roy Fairchild, Secretary. . . . 495 



Session of Tuesday, December 30 496 



Report of the Council 497 



Secretary's report 497 



Treasurer's report 499 



Editor's report 501 



Librarian's report 502 



Election of officers 503 



Election of Fellows 504 



Memoir of Alpheus Hyatt [with bibliography] ; by AV. 0. Crosby... 504 

 Memoir of James E. Mills [with bibliography] ; by J. C. Branner. . 512 

 Basal conglomerate in Lehigh and Northampton counties, Pennsylva- 

 nia ; by Frederick B. Peck 518 



Devonian and Carboniferous rocks of southwestern New York ; by 



L. C. Glesn 522 



Age of the Atlantosaurus beds [abstract] ; by Willis T. Lee 531 



Geology of Beacraft mountain, New York [abstract] ; by A. W. Grabau. 532 

 Chemical composition of igneous rocks expressed by means of dfa- 



grams [abstract] ; by J. P. Iddings 533 



Quantitative distribution of rock magmas [abstract] ; by H. S. Wash- 

 ington 533 



Nepheline syenite area of San Jose, Tamaulipas, Mexico [abstract] ; 



by G. I. Finlay and J. F. Kemp 534 



Session of Tuesday evening, December 30 . 534 



Session of Wednesday, December 31 : 534 



Primitive characters of the Triassic ichthyosaurus [abstract] ; by John 



C. Merriam 536 



Paleontological work in New York [abstract] ; by John M. Clarke. . 536 

 Distribution of mastodon remains in New York [abstract] ; by John 



M. Cla rke 537 



Permian elements in the Dunkard flora [abstract] ; by David White. 538 

 An important but not well known locality furnishing Cretaceous fishes 



[abstract] ; by O. P. Hay 542 



The Blue ridge of North Carolina [abstract] ; by W. M. Davis 543 



Fresh water Tertiaries at Green River, Wyoming [abstract] ; by W. M. 



Davis \.. 544 



ion of Thursday, January 1, 1903 544 



Report of the Auditing Committee 545 



Tliirteenth annual report of the Committee on Photographs 545 



Communication to the House of Representatives concerning Appa- 

 lachian reserve 546 



Origin of ocean basins on the planetesimal hypothesis [abstract] ; by 



T. C. Chamberlin 548 



Recent volcanic craters in Idaho and Oregon [abstract] ; by I. C. 

 HussELL 549 



