UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



Vol. 5, No. 22, pp. 319-330 ANDREW C. LAWSON, Editor 



THE OCCURRENCE 



OF 



STREPSICERINE ANTELOPES 



IN THE 



TERTIARY OF NORTHWESTERN NEVADA 



BY 



JOHN C. MERRIAM. 



CONTENTS. 



PAGE 



Introduction 319 



Ilingoceros alexandrae, n. gen. and sp 320 



Sphenophalos nevadanus, n. gen. and sp 325 



Systematic position of Ilingoceros and Sphenophalos 327 



Related forms in America 329 



INTRODUCTION. 



During the summer of 1909, a palaeontological expedition whs 

 organized and financed by Miss Annie M. Alexander for the 

 purpose of collecting mammalian remains in the Tertiary for- 

 mations of northwestern Nevada, the collections being presented 

 by Miss Alexander to the University of California. The party 

 worked over the region of Virgin Valley, and Thousand Creek, 

 in which a small collection had been obtained by the writer in 

 1906 1 , and also obtained material at a number of localities not 

 heretofore known. The collections brought together represent a 



i Merriam, J. C, The Occurrence of Middle Tertiary Mammal-Bearing 

 Beds in Northwestern Nevada, Science, n. s., vol. 26, p. 380. 



