VIU BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Page 



Methods of study and the ckissification of American Tertiary 

 hryozoa [ahstract] ; by F, Canu and R. S. Bassler 204 



The paleontology of arrested evolution ; Presidential address 

 by Rudolph Ruedemann 205 



Present status of areal mapping in the Coastal Plain and of 

 the paleontologic investigations in the Coastal Plain, Pan- 

 ama, and the AVindward Ishmds [abstract] ; by T. Wayland 

 Vaughan 205 



Were the graptolite-bearing shales, as a rule, deep or shallow 

 water deposits? [abstract] ; by Amadeus W. Grabau and 

 Marjorie O'Connell 205 



Graptolite zones of the Utica shale [abstract] ; by Rudolph 



RUEDEMANN 20(1 



Session of Friday, December 30 20G 



Symposium on the interpretation of sedimentary rocks 200 



The problems stated ; by A. W. Grabau 206 



Significance of sedimentary rhythm ; by Joseph Barrell 20G 



Diagnostic characteristics of marine elastics ; by E. M. Kindle 207 

 Characteristics of continental elastics and chemical deposits ; 



by Eliot Blackwelder 207 



Significance of sorting in sedimentary rocks ; by E. W. Shaw . 207 

 Chemical and organic deposits of the sea ; by T. Wayland 



Vaughan 207 



Presentation of papers 207 



Devonian and Black Shale succession of western Tennessee 



[abstract] ; by Carl O. Dunbar 207 



Stratigraphic relations of the Tully limestone and the Gene- 

 see shale of New York and Pennsylvania [abstract] ; by 



Amadeus W. Grabau 207 



American Diphyphylloid corals [abstract] ; by George H. 



Chadwick 208 



Criteria of attitude in bedded deposits [abstract] ; by Lan- 

 caster D. Burling 208 



Devonian of central Missouri ; Fauna of the Cooper Lime- 

 stone [abstract] ; by Darling K. Greger 209 



Albertella fauna ; by Charles D. Walcott 209 



Some fundamental points in the classification of trilobites ; 



by Percy E. Raymond 200 



Section of Vertebrate Paleontology 209 



Session of Thursday, December 28 209 



Fossil mammals from Porto Rico [abstract] ; by H. E. 



Anthony 209 



Second report of the committee on nomenclature of skull ele- 

 ments in Tetrapoda [abstract] ; by W. K. Gregory 210 



Session of Friday, December 29 210 



South Carolina mastodon [abstract] ; by F. B, Loomis 210 



Horned artiodactyl from the Tertiary of Nebraska [abstract] ; 



by R. S. Lull 211 



Felidse of Rancho la Brea [abstract] ; by J. C. Merriam 211 



