BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Page 



Session of Wednesday, December 29 121 



Report of the Council 122 



Secretary's report 122 



Treasurer's report 123 



Appointment of Auditing Committee 124 



Election of ofiicers and members 124 



Amendment to the Constitution 125 



New nominations and election to membership 125 



Election of Correspondent i 12G 



Presentation of papers 126 



Paleontological exhibits at the U. S. National Museum [ab- 

 stract] ; by R. S. Basslee 126 



Observations on the mode of life of primitive cephalopods ; 



by R. RUEDEMANN 127 



Anatomy of Middle Cambi'ian Crustacea [abstract] ; by 



Charles D. Walcott 127 



American species of the genus Schwagerina and their strati- 

 graphic significance ; by J. W. Beede 127 



Graptolite localities of western North America, with descrip- 

 tion of two new formation names [abstract] ; by L. D. Bur- 

 ling 127 



New kind of type specimen ; by E. L. Troxell 12S 



Upper Cambrian trilobites [abstract] ; by O. T. Walter 128 



Niagaran rocks of the northern peninsula of Michigan [ab- 

 stract] ; by G. M. Ehlers 129 



Status of our knowledge of Mesozoic pathology ; by Roy L. 



MOODIE 130 



Small fossils from the Lime Creek shales [abstract] ; by A. O. 



Thomas 130 



Presidential address 131 



. Origin of the South American faunas ; Presidential address 



by F. B. Loomis 131 



Symposium on criteria and methods employed in paleontological 



research 131 



Criteria for the determination of the climatic environment of 



extinct animals ; by E. C. Case 131 



Criteria for determination of climate by means of fossil 



plants ; by F. H. Knowlton 131 



Methods of determining the relationships of marine inverte- 

 brate fossil faunas ; by Charles Schuchert 131 



Criteria for species, phylogenies, and faunas of trilobites ; by 



P. E. Raymond 131 



Age determination of faunas ; by E. O. Ulrich 132 



Methods of creating popular interest in exhibits of fossils ; 



by E. S. RiGGS 132 



Presentation of papers 132 



Decreasing salinity of the Pleistocene Champlain Sea going 

 southward, as shown by the character of the fauna, with a 



