1919] Merriam: Tertiary Mammalian Faunas of Mohave Desert 437c 



PAGE 



Hipparion, sp. A 554 



Hipparion, sp. B 554 



Relationships of Ricardo hipparions 556 



Origin of Ricardo hipparions 558 



Pliohippus tantalus Merriam 561 



Pliohippus fairbanksi Merriam 564 



Pliohippus, sp. A, near mirabilis (Leidy) 567 



Pliohippus milk dentition 567 



Equid skeletal elements 568 



Oreodontidae 575 



Merycochoerus? (Pronomotherium?) californicus, n. sp 575 



Camelidae 580 



Bovidae 582 



Merycodus, near necatus Leidy 582 



Bovid or Cervid, indet 585 



INTRODUCTION 



Early in the spring of 1911, John R. Suman, then a student of 

 the University of California, brought to the writer a small collection 

 of fossil bones and teeth obtained on the Mohave Desert by H. S. 

 Mourning of Los Angeles. This collection was presented to the 

 University by Mr. Mourning and Mr. Suman, and constituted the 

 basis for the first study of the Mohave faunas. In a brief article 1 

 published soon after receiving this collection, the writer called atten- 

 tion to the importance of this discovery, as it offered the possibility 

 of correlating the deposits of the Mohave region with those of the 

 extensive mammal-bearing formations of the Great Plains area, and 

 might ultimately assist in determining the time relations of formations 

 in the Pacific Coast province to deposits of the Great Basin and Great 

 Plains areas. The collection was considered to represent approx- 

 imately an upper Miocene stage, and to point toward close faunal 

 relation of the Mohave region with the Great Plains area in the period 

 during which this fauna flourished. 



In the spring and early summer of 1911, C. L. Baker, then fellow 

 in palaeontology at the University, visited the locality reported by 

 Mr. Mourning and secured a considerable collection of mammalian 

 remains. Mr. Baker was joined later by Wallace Gordon and bv 

 Mr. Suman, who assisted with the work. In connection with the 



i Merriam, J. C, A Collection of Mammalian Remains from Tertiary Beds on 

 the Mohave Desert, Univ. Calif. Publ., Bull. Dept. Geol., vol. 6, pp. 163-169. 

 pi. 29, 1911. 



