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University of California Publications in Geology [Vol. 11 



BARSTOW FAUNA 



Mollusca 



Anodonta? 



Planorbis mohavensis Hannibal 



Limnaea, sp. 

 Testudinata 



Testudo mohavense, n. sp. 

 Aves 



Buteo, sp. 

 Carnivora 



Canid (Canis?), sp. small 



Tephrocyon, near temerarius 

 (Leidy) 



Aelurodon, near wheelerianus Cope 



Aelurodon, Dinocyon, or Amphi- 

 cyon, sp. 



Machaerodont, sp. a 



Machaerodont, sp. b 



Machaerodont, sp. c 



Felid?, indet. 



Pseudaelurus, sp. 

 Rodentia 



Lepus?, sp. 

 Proboscidea 



Tetrabelodon ?, sp. 



Equidae 



Hypohippus, near affinis (Leidy) 

 Parahippusf mourningi Merriam 

 Meryehippus (Protohippus) inter- 



montanus Merriam 

 Meryehippus ealamarius stylodontus, 



n. var. 



Meryehippus sumani Merriam 

 Protohippus? or Pliohippus?, sp. 



Suidae 



Prosthennops?, sp. 



Oreodontidae 



buwaldi, 



n. sp. 



Meryeochoerus 1 

 Camelidae 



Procamelus, sp. a 



Procamelus, sp. 5 



Pliauehenia, sp. 



Alticamelus ?, sp. 

 Cervidae 



Dromomeryx or Cervus?, sp. 

 Bovidae 



Merycodus necatus? Leidy 



Merycodus? coronatus Merriam 



Relation op the Barstow Fauna to its Environment 



The fauna of the Barstow beds is as a whole that of an open 

 country affording' fairly abundant grass and herbage, and evidently 

 better watered than the Mohave Desert at the present day. The 

 abundance of remains of grazing horses of the Meryehippus type, the 

 presence of mastodons, oreodonts, abundant merycodonts, a consider- 

 able variety of camels, and a peccary all indicate that nutritious 

 vegetation must have been more abundant than at present. The 

 Meryehippus forms would probably not have been present in such 

 numbers unless grasses were well represented. 



The climate of the Mohave area during the time of deposition of 

 these mammal-bearing beds was not improbably semi-arid, like portions 

 of the Great Valley of California at the present day. The relatively 

 small representation of peccaries and oreodonts and of the Hypo- 

 hippus group, and the presence of large tortoises is possibly to be 

 correlated with open semi-arid character of the country. 



That small bodies of water were present at times in this area is 

 shown by the discovery of an abundance of fresh water molluscan 

 remains at certain horizons. 



