BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 Vol. 32, pp. 119-156 March 31, 1921 



PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



PROCEEDINGS OF THE TWELFTH ANNUAL MEETING OF 

 THE PALEONTOLOGICAL SOCIETY, HELD AT CHICAGO, 

 ILLINOIS, DECEMBEE 28-30, 1920.i 



E. S. Bassler, Secretary 



CONTENTS 



Page 



Session of Tuesday, December 28 121 



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 officers and members 124 



Amendment to tlie Constitution 125 



New nominations and election to membership 125 



Election of correspondent 126 



Presentation of papers • 126 



Paleontological exhibits at the U. S. National Museum [abstract] ; 



by R. S. Bassler 126 



Observations on the mode of life of primitive cephalopods ; by 



R. Ruedemann 127 



Anatomy of Middle Cambrian Crustacea [abstract] ; by Charles D. 



Walcott 127 



American species of the genus Schwagerina and their stratigraphic 



significa nee ; by J. W. Beede 127 



Graptolite localities of western North America, with description 



of two new formation names [abstract] ; by L. D. Burling 127 



New kind of type specimen ; by E. L. Troxell 128 



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



Niagaran rocks of the northern peninsula of Michigan [abstract] ; 



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 



1 Manuscript received by the Secretary of the Society March 3, 1921. 



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