516 University of California Publications in Geology [Vol. n 



in the Great Plains region. In the other form, no. 21556 (fig. 108), 

 the proximal articular area is relatively much wider and the posterior 

 hook is smaller. This is possibly Pliauehenia. 



In the form of the phalanges there is also a wide variation corre- 

 sponding in general to the grade of difference in astragali. The form 



Figs. 105 to 112b. Camel remains from Barstow Miocene, Mohave Desert, 

 California. 



Fig. 105, Procamelus, sp., proximal end of cannon bone, anterior limb, 

 no. 22489, X fig. 106, Pliauehenia, sp., proximal end of cannon bone, anterior 

 limb, no. 22488, X Vs ; fig. 107, Procamelus, sp., proximal end of cannon bone, 

 posterior limb, no. 21555, X % ; fig. 108, Pliauehenia?, sp., proximal end of can- 

 non bone, posterior limb, no. 21556, X % ; fig. 109, Alticamelus? or Pliauehenia, 

 sp., first phalanx, no. 21558, X % ; fig. 110, Alticamelus? , sp., first phalanx, no. 

 22487, X Y-i ; fig- HI) Procamelus or Pliauclienia, sp., second phalanx, no. 22486, 

 X % ; figs. 112a and 112b, Procamelus?, sp., ungual phalanx, no. 22485, X %, 

 fig. 112a, dorsal view; fig. 112b, side view. 



represented by no. 21558 (fig. 109) may represent Alticamelus. 

 Smaller forms seen in no. 21557 evidently belong to Procamelus. 



A fine specimen, no. 21569, shows the greater portion of the 

 anterior limb of an individual of approximately the same dimensions 

 as in Alticamelus or Procamelus leptocolon of the Pawnee Creek 

 Miocene in the Great Plains region. 



