1913] 



Merriam: Fauna of Orindan and Siestan 



381 



PRO('AMELUS(?), sp. 

 A portion of the anterior limb (fig. 6, no. 1560) of a camel 

 somewhat larger than the existing llama was found at locality 

 299 near the middle of the Orindan beds at Bolinger Canon. 

 This specimen does not show any characters which are recognized 

 by the writer as certainly indicating its specific or generic 

 position, but it is evidently near Procamelus, a genus well known 

 in the Upper Miocene of the Great Plains and Basin regions. 

 The species represented by this specimen is larger than the forms 

 found in the Basin region, but the dimensions shown here are 

 approached by Procamelus robust us of the Great Plains. 



Measurements 



Radius, greatest transverse diameter of distal end 62.5 mm. 



Cannon bone, greatest transverse diameter of proximal end 58.6 



Scaphoid, greatest anteroposterior diameter 38.8 



Lunar, greatest height 31. 



Magnum, greatest anteroposterior diameter 34.7 



PLIAUCHENTA( ?), sp. 

 A fragment of the distal end of a cannon bone (fig. 7, no. 

 1982) was obtained by J. P. Buwalda at locality 707 in the 

 Siestan beds of Siesta Valley, in the hills immediately to the 

 east of Berkeley. This specimen, though very fragmentary, cer- 

 tainly represents a large camel approximating the dimensions 

 of the Recent Camelus. It evidently belongs to a form con- 

 siderably larger than the species from the Orindan of Bolinger 

 Canon and probably represents a species of the genus Pliauchenia, 

 a large camel of a more advanced stage of development than 

 Procamelus. Pliauchenia is a characteristic form of late Miocene 



to Pliocene time. 



Measurements 



Transverse diameter of cannon bone 60 mm. above the distal end ... 64. mm. 



Thickness of cannon bone 60 mm. above the distal end 26.6 



Least width of one of the two distal divisions of the cannon bone 

 below the point of fusion 39. 



TETR ABELODON( ?), sp. 

 Remains of mastodon-like forms have been found by R. E. 

 Dickerson in the upper portion of the Orindan section of 

 Bolinger Canon, and by J. P. Buwalda in the lower portion of 



