262 C. Stock — Cenozoic Mammalian Remains. 



In the magmim of no. 23917 that portion of the artic- 

 ulating surface for the lunar, situated on the dorsal side 

 of the posterior process, is continuous with the forward 

 portion of the contact surface. In the magnum of no. 

 23916 from the Panaca beds the posterior articulation for 

 the lunar forms a discrete surface. The articulating 

 facet for the unciform on the outer side of the magnum is 

 wider in no. 23917 than in no. 23916. 



The cuneiform in no. 23917 exhibits the slenderness 

 characteristic of the limb. It is distinctly less robust 

 than the corresponding element in the camel from the 

 Panaca beds. The posterior end is thin and quite 

 different from that of the cuneiform of no. 23916. 



The lunar in no. 23917 is very narrow transversely. 

 On the ventral surface the posterior facet for the magnum 

 is continuous with the forward articulating surface for 

 this carpal element, not separated from it as in the lunar 

 of the specimen from the Panaca beds. 



Single artiodactyl astragalus, no. 23930, ^g. 10, from 

 locality 3550, approximates in size the smaller astragali 

 of Procamelus from the Barstow Upper Miocene deposits 

 of the Mohave Desert. The astragalus found near 

 Overton, Nevada, differs from specimen 21554^ from the 

 Barstow in being larger and in lacking the narrow 

 transverse diameter which is so prominent a feature 

 in the latter element. No. 23930 approaches most closely 

 in size the second astragalus of Procamelus^^ from the 

 Barstow as figured by Merriam. 



Measurements of No. 23917. 



Carpus 

 Depth measured from proximal surface of cuneiform 



to distal surface of unciform 33.3 mm. 



Anterior cannon bone 



Length 323 



Width of proximal end a40.8 



Width at middle of shaft .6^20.7 



Width of distal end ^40 



Digit 4, phalanx 1 



Length .' 78.6 



Width of distal end 16.8 



» Merriam, J. C, op. cit., p. 512 and fig. 98, p. 515, 1919. 

 " Merriam, J. C, op. cit., fig. 99, p. 515, 1919. 



