414 PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



nia. The symposium, "Correlation of the Cretaceous," formed the topic 

 of this meeting- and the following papers were presented : 



CORRELATION BETWEEN THE CRETACEOUS OF THE PACIFIC AREA AND 

 THAT OF OTHER REGIONS OF THE WORLD 



BY TIMOTHY W. STANTON " 



CORRELATION OF THE CRETACEOUS INVERTEBRATE FAUNAS OF CALIFORNIA 



BY TIMOTHY W. STANTON 



CORRELATION BETWEEN INVERTEBRATE FAUNAS OF CALIFORNIA AND 



THOSE OF MEXICO 



BY EARL L. PACKARD 



COMPARISON OF THE CRETACEOUS FAUNAS OF JAPAN WITH THOSE OF 



WESTERN UNITED STATES 



BY H. Y'^ABE 



COMPARISON OF THE CRETACEOUS FLORAS OF CALIFORNIA WITH THOSE OF 



OTHER CRETACEOUS AREAS 



BY V. H. KNOWLTON 



Read by John C. Merriam. 



Discussion of the preceding five Papers 



lu reply to Trofessor Schucliert's query as to the cause of the discordance 

 between the floras and the faunas of the Knoxville when used as indicators of 

 age of this formation, Doctor Stanton stated that the faunal evidence was 

 not strong. 



I'rofessor Smith noted that the Knoxville and Mariposa are never found in 

 contact. The persistence of striated Aucella> later than the Mariposa is not 

 especially significant. It indicates that the time interval was not great. 



Doctor Stanton remarked that paleohotanists make no distinctions between 

 the Upper Knoxville and Horsetown floras, while there is a distinct difference 

 in the faunas. 



Professor Schuchert stated that if there was a great movement at the end 

 of the Jurassic there must be a marked unconformity- and the disturbance 

 must be reflected in the faunas. 



Doctor Ulrich stated that there was undoubtedly considerable land during 

 the Jurassic-Cretaceous interval. Since the age is determined by the marine 

 faunas, and since the last of the Jurassic flora would leave its impression on 

 the Cretaceous flora, there seems to be no agreement between the evidence de- 

 rived from these sources. It was suggested that the standards may not agree; 



