264 C. Stock — Cenosoic Mammalian Remains, 



The fauna from the Panaca beds includes horses, a 

 rhinoceros, and a camel, while a horse and species of 

 camels comprise the mammalian assemblage known by 

 specimens collected in the Muddy Valley deposits. 



Evidence derived from a study of the small mammalian 

 faunas seems to suggest that the later Cenozoic beds of 

 Meadow Valley and of Muddy Valley were not deposited 

 during the same period of time. The Panaca beds are 

 presumed to be Pliocene, while the Muddy Valley deposits 

 are tentatively regarded as representing an earlier 

 accumulation, possibly of the Miocene. 



Berkeley, California. 



