514 University of California Publications in Geology [Vol. ll 



In the posterior metapodials of the Barstow forms there are two 

 distinct types of articulation at the proximal end. One is shown 

 in no. 21555 (fig. 107), in which the area for articulation with the 

 cuboid and ectocuneiform is narrow transversely and the posterior 

 hook is relatively large and high. This type evidently represents 

 Procamelus, and is to be associated with one of the two intermediate 

 types of astragalus. It corresponds very closely to the type seen in 

 the proximal end of some of the Procamelus-like forms of the Miocene 



Fig. 94. Procamelus?, sp. Inferior dentition, no. 22482, natural size. Bar- 

 stow Miocene, Mohave Desert, California. 



Fig. 95. Procamelus? sp. Superior molar, no. 23129, natural size. Barstow 

 Miocene, Mohave Desert, California. 



Fig. 96. Procamelus?, sp. Inferior milk teeth, no. 21554, natural size. Bar- 

 stow Miocene, Mohave Desert, California. 



Fig. 97. Procamelus, sp. Fragment of mandible with M, and M.„ no. 21562, 

 X Y2- Barstow Miocene, Mohave Desert, California. 



