ABSTRACTS OF PAPERS 137 



PRELIMINARY NOTEii ON RECENT TERTIARY COLLECTIONS IN THE WEST 

 BY RALPH W. CHANEY 



{Abstract) 



Collections of fossil plants were made during the past summer under the 

 auspices of the University of California. In the John Day Basin material was 

 secured from three horizons, in which some new species are represented ; sev- 

 eral new localities were discovered, inclyding one at the type locality of the 

 Maseall formation, where the flora resembles that previously secured from the 

 Mascall, but contains a number of forms which indicate a swamp habitat. A 

 collection from The Dalles group is of particular interest, since few fossils 

 have been previously secured from this formation. The modern aspect of the 

 leaves of this flora suggests its Pliocene or Pleistocene age. In the Sierras the 

 Auriferous Gravels were visited, and limited collections made ; these will be 

 supplemented by collections during the coming field season, which will, it is 

 hoped, establish the age or ages of the various gravel deposits. 



The final paper on the program was given hy President Loomis, who 

 presented a discussion of the Lower Harrison Oreodonts, and especially 

 the criteria for the determination of species and genera, under the title 



LOWER HARRISON OREODONTS 

 BY F. B. LOOMIS 



At 11.30 a. m. the Society adjourned. 



Under the leadership of E. S. Riggs, the members then had the pleas- 

 ure of a visit to the Field Museum, where several hours were spent in 

 viewing the new building and in studying the exhibition collections and 

 their installation. 



