194 



University of California Publications in Geology [Vol. 9 



A well-preserved atlas and a portion of an axis with specimen 

 19820 do not differ appreciably from those of Cope's New Mexico 

 specimen excepting in their slightly larger size. 



PLIAUCHBNTA?, sp. 

 Astragali and phalanges (figs. 35. 37 and 40) of a large camel 

 ha vin»- at least twice the bulk of Procamelus gracilis are found in the 

 Cedar Mountain fauna. These elements correspond approximately to 

 foot-bones referred to the genus Pliauchenia in the fauna of the 

 Barstow beds. Until material showing structure of dentition and limbs 

 is adequately represented, it is useless to speculate as to the specific 

 determination of the form represented by these specimens. 



Merycodontidae 

 A small collection of the material including antlers, teeth, and a 

 portion of a jaw from the Cedar Mountain region represents one or 

 more species of Merycodus. One form seems identical with M. furcatus, 

 another is indistinguishable from antlers which form a part of the 

 series included in M. necatus from the Barstow beds. 



MEEYCODUS FURCATUS (Leidy) 



A nearly complete antler no. 21492 (fig. 44) from lone Valley 

 resembles Merycodus furcatus in the round, little-flattened beam with 

 strongly-curved, slender tines. 



A second specimen, no. 19807 (fig. 45) shows a long, slender beam 

 with nearly circular cross-section. It is broken above and shows no 

 tines. This form of antler is entirely unlike that of Merycodus 

 necatus, but may appear in M. furcatus. The majority of the frag- 

 ments of antlers found seem most nearly to approach the M . furcatus 

 type. 



A portion of a jaw, no. 19805 (fig. 46) found at the same locality 

 with the slender antler no. 19807 shows the last two inferior premolars. 

 A number of scattered teeth include M 2 and M 3 . The lower molars 

 are strongly hypsodont. M 3 (fig. 48) shows a moderately developed 

 third or posterior lobe. The premolars in no. 19805 are somewhat 

 elongated, while the inner lateral grooves are short and deep. The 

 outer posterior lateral groove is imperfectly marked, and in this respect 

 these teeth seem less progressive than in the premolars from the 



