120 PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



Page 

 Symposium on criteria and metliods employed in paleontolo^ical re- 



searcli l''l 



Criteria for tlie deteimination of tlie climatic environment (jf ex- 

 tinct animals ; by E. C. Case 131 



Criteria for determination of climate by means of fossil plants; 



by F. H. Knowlton l-'il 



Methods of determining the relationsliips of marine invertebrate 



fossil faunas ; by Charles Scliuchert lol 



Criteria for species, phylogenies, and faunas of trilobites ; l)y P. E. 



Raymond 131 



Age determination of faunas : by E. ( ). 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 Champlaiu Sea going soutli- 

 ward. as shown by the character of the fauna, with a brief dis- 

 cussion of the I'leistocene fauna of tlie Hudson Valley and its 



significance [abstract] ; by Winifred Goldring 132 



Session of Thursday, December 30 ' 134 



Report of tlie Auditing Committee 134 



I'resentation of papers 134 



Cycadlike leaves from the Permian of Texas [abstract] ; by Adolf 



C. Noe 134 



Genus Sequoia in the iViesozoic [abstract] ; by E. C. Jeffrey 134 



Genus Araiicanoxi/Jon in tlie American Cretaceous [abstract] ; by 



E. C. Jeffrey 135 



Cupressiuoxyla of the Mesozoic [abstract] ; by E. C. Jeffrey 135 



Besmatosuclnis stipreiisis from tlie Dockum Triassic beds of west- 

 ern Texas [abstract] : by E. C. Case 136 



Evolution, pliylogeny, and classiticatiou of the Proboscidea ; by 



Henry Fairfield Osborn 136 



Classification of tlie reptiles ; by W. K. Gregory 136 



Jurassic fishes collected by Barnum Brown in Cuba ; by W. K. 



Gregory 136 



Relationsliip of the Great Basin and Great Plains faunas ; by 



E. L. Troxell 136 



Preliminary notes on recent Tertiary collections in the West [ab- 

 stract] ; by Ralph W. Chaney 137 



Lower Harrison oreodonts ; by F. B. Loomis 137 



Register of the Chicago meeting, 1920 138 



Officers, Correspondents, and Members of the Paleontological Society 139 



Minutes of the Tenth Annual Meeting of the Pacific Coast Section of the 



Paleontological Society ; by Chester Stock, Secrctari/ 145 



Reading of paleontological papers 145 



A study of the fauna and stratigraphy of the Briones formation 

 of middle California [abstract] ; by Parker Davies Trask 145 



