ABSTRACTS OF PAPERS 151 



meeting in joint session with the Geological Society of America. The 

 speakers and titles of their special subjects in the symposium are as 

 follows : 



SYMPOSIUM 0\^ THE PASSAGE PROM THE JURASSIC TO THE CRETACEOUS 



INTRODUCTION 

 BY HENRY FAIRFIELD OSBORN 



THE MORRISON; AN INITIAL CRETACEOUS FORMATION 

 BY WILLIS T. LEE 



GEOLOGIC EXPOSURES OF THE MORRISON 

 BY CHARLES C. MOCK 



8AUR0P0DA AND 8TEG0SAURIA OF THE MORRISON COMPARED WITH THAT 

 OF SOUTH AMERICA, ENGLAND, AND EASTERN AFRICA 



BY RICHARD S. LULL 



THE PALEOBOTANIC EVIDENCE 

 BY EDWARD W. BERRY 



THE INVERTEBRATE FAUNA OF THE MORRISON 

 BY T. W. STANTON 



With the completion of the symposium, at 1 p. m., the Society ad- 

 journed for luncheon, meeting again in general session at 3.30 in the 

 library. There was then presented the presidential address of the retir- 

 ing President, on the subject, 



THE ADDITION AND EVOLUTION OP "CHARACTERS" IN PALEONTOLOGIC 



PHYLA 



BY HENRY FAIRFIELD OSBORN 



Following this address, which was illustrated by lantern slides, Presi- 

 dent Osborn announced that the Society would then meet in two sections 

 for the rest of the program, a vertebrate section to occupy an adjoining 

 room and a section of invertebrate, paleobotanic, and general paleontology 

 to remain in session in the library. The minutes of the first section 

 follow. 



SECTION OF VERTEBRATE PALE()N'l'OLO<iY 



The section was called to order by l^resideiit Osborn, cliairman, at 

 13.35, Wednesday afternoon, for the reading of sectioiial papers. W. D. 



