38 



University of California Publications in Geology [Vol. 8 



It will be noted in the above list of species that there is a very 

 large preponderance of forms which are at present migratory. The 

 remainder, with the exception of Lophortyx, are birds of very wide 

 range of distribution. Study of the birds remains is thus seen to 

 contribute nothing to the question of climatic conditions as raised by 

 - Arnold.- The presence of Catharies and Sturnella is in harmony with 

 the hypothesis of alternating submergence and exposure as sand dunes. 

 The presence of Lophortyx, the larger herbivorous mammals, rodents 

 including leporids, small chelonians, and serpents would very strongly 

 suggest fluviatile contributions due possibly to seasonal conditions of 

 high water. 



Transmitted October 29, 10 IS. 



