UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



Vol. 7, No. 19, pp. 373-385 Issued September 24, 1913 



VERTEBRATE FAUNA OF THE ORINDAN 

 AND SEE ST AN BEDS IN MIDDLE 

 CALIFORNIA 



BY 



JOHN C. MERRIAM 



PAGE 



Introduction 373 



Equidae - 375 



Neohipparion, sp 375 



Hipparion(f) or Neohipparion 376 



Neohipparion or Meryehippus 376 



Protohippine( ?) astragalus 377 



Prosthennops( ?), sp 377 



Camelidae 380 



Procamelus(?), sp 380 



Pliauchenia( ?), sp 381 



Tetrabelodon(?), sp 381 



Dipoides lesontei (Merriam, J. C.) 382 



Lepus, sp 383 



Plant Remains 383 



Age of the Orindan and Siestan Vertebrate Faunas 384 



INTRODUCTION 



The Orindan and Siestan formations occurring in the hills 

 immediately to the east of Berkeley form the larger part of a 

 thick accumulation of fresh-water and alluvial beds resting 

 uncomformably upon the marine Miocene. The Orindan forma- 

 tion is the lower portion of these beds, and comprises a great 

 thickness of clays, shales, sands, conglomerates, and tuffs, with 

 occasional beds of limestone. The Orindan is followed by a 



