BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 Vol. 24, pp. 99-132 March 24, 1913 



PROCEEDINGS OF THE FOURTH ANNUAL MEETING OF 

 THE PALEONTOLOGICAL SOCIETY, HELD AT NEW 

 HAVEN, CONNECTICUT, DECEMBER 30 AND 31, 1912. 



R. S. Bassler, Secretary 



CONTENTS 



Page 

 Session of Monday, December 30 101 



Report of the Council 101 



Secretary's report 101 



Treasurer's report 103 



Appointment of Auditing Committee 103 



Election of officers and members 104 



Announcement as to presentation of papers 105 



Alpheus Hyatt and his principles of research [abstract]; by Robert 

 T. Jackson 105 



Restoration of Tertiary fossils [abstract] ; by William B. Scott 105 



Paleozoic Arachnida — scorpions and spiders [abstract] ; by Alexander 

 Petrunkevitch 106 



Presidential address 106 



Preliminary discussion of the stratigraphy and age of the Pyrotherium 

 beds of Patagonia [abstract] ; by Frederick B. Loomis 107 



Organization of Section on Vertebrate Paleontology 107 



The cataract; a new formation at the base of the Siluric in Ontario 

 and New York [abstract] ; by Charles Schuchert 107 



The Medina problem [abstract] ; by E. O. Ulrich 107 



Session of Tuesday, December 31 108 



Paleontological notes: 1. Polyphyletic genera. 2. An illustration of 

 Waagen's theory of mutations [abstract] ; by A. W. Grabau 109 



Nomenclature, structure, and classification of the Creinaerinidae [ab- 

 stract] ; by E. O. Ulrich 109 



Richmond formations of the provinces of Ontario and Quebec in 

 Canada [abstract] ; by A. F. Foerste 110 



Crinoid genus Scyphocrinus and its bulbous root Camarocrinus [ab- 

 stract] ; by Frank Springer L10 



Correlation of the Middle Ordovh ian formations of Ontario and Que- 

 bec [abstract] ; by P. E. Raymond ill 



The Alexandrian series in Missouri and Illinois Stratigraphy and 

 paleontology, Part 1 I abstract I : by T. E. Savage 111 



Notes on the origin of certain Upper Cambrian and Lower Ordovlclan 

 sediments of Center County, Pennsylvania [abstract I ! by Thomas C. 



Brown "- 



(99) 



