162 University of California Publications in Geology [Vol. 9 



PAGE 



Protohippus?, sp Igg 



Proboscidea jg9 



Tetrabelodon, sp igg 



Camelidae 1§9 



Procamelus, near gracilis Leidy 2 89 



Pliauchenia ?, sp 194 



Merycodontidae ^94 



Meryeodus furcatus (Leidy) 194 



Merycodus, near necatus Leidy 197 



Description of Collecting Localities 197 



INTRODUCTION 



In a study of the Tertiary faunas of the Great Basin province, now 

 being carried on by the Department of Palaeontology of the Uni- 

 versity of California, one of the most fruitful investigations has been 

 that comprising the exploration of the Cedar Mountain region of 

 western Nevada. This area was visited by Charles L. Baker and 

 John P. Buwalda in the summer of 1912 in the hope of finding a 

 Tertiary mammalian fauna in deposits situated between the occurrences 

 of Tertiary beds at Virgin Valley and Thousand Creek on the northern 

 border of Nevada, and those of the Barstow and Ricardo areas of 

 the Mohave Desert to the south. 



Information regarding the occurrence of fossil remains in the area 

 visited by Baker and Buwalda had previously been received through 

 the courtesy of Mr. T. Holman Buck of Mina, Nevada, and through 

 Professor George J. Young of the University of Nevada. Mr. Buck 

 very kindly visited the localities with Baker and Buwalda, and was 

 instrumental in securing and transporting to the railroad some of the 

 most interesting material, notably the type specimen of a new and 

 interesting anchitheriine horse. The area was visited by Dr. Buwalda 

 in July, 191-4, for the purpose of reviewing the work carried on in 1912. 



The expedition in 1912 secured a significant collection, including 

 a considerable variety of mammalian forms. Although the amount 

 of material obtained is relatively small, the faunal representation is 

 almost as large as that of the Barstow fauna, and in importance the 

 area ranks with the Virgin Valley and Mohave localities. 



In the preparation of the following report on the fauna of the 

 Cedar Mountain region the writer has been especially indebted to 

 Charles L. Baker and John P. Buwalda for their energetic prosecu- 

 tion of the field work through which the collection was obtained, 

 and to Mr. Buck of Mina, Nevada, for information leading to location 



