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University of California Publications. [Geology 



the protoconid and hypoconid is large, and there is a faint basal 

 tubercle between the hypoconid and the heel. 



Numerous scattered limb elements from the 0gin Valley 

 Beds represent a form of Dromomeryx near borealis (Cope). 

 The best preserved specimen is one from locality 1095, in which 

 the larger part of an anterior limb is represented. In this speci- 

 men the proportions of the limb differ sligfhtly from those given 

 by Douglass for D. borealis. This is especially true of the meta- 

 podial. In the limb figured (fig. 60a) a section of the middle of 

 the bone was missing when the specimen was discovered. With- 

 out considering the missing fragment the length of this bone is 

 greater and the form more slender than that of the anterior 

 metapodial figured by Douglass. Making a small allowance for 

 this fragment the length of the Virgin Valley specimen is notice- 

 ably greater and the slenderness more apparent. 



Measurements 



No. 19417 



Radius. 



Greatest length along anterior border 250. mm. 



Greatest diameter across distal end 47.6 



Digit IV. 



Phalange I, greatest length 45.5 



Phalange II, greatest length 29. 



Phalange III, greatest length 39.5 



No. 10676 



M 3 , anteroposterior diameter : 19.6 



No. 19444 



Upper molar, anteroposterior diameter 21.2 



No. 11748 



M 3 , anteroposterior diameter 30. 



DROMOMERYX, sp. b 



A portion of an upper jaw with molars 1 to 3 (no. 11470, 

 figs. 61a and 616) is from a form referable to Dromomeryx, but 

 considerably smaller than the specimen examined by Gidley. 

 This specimen represents an individual quite certainly distinct 

 from D. borealis (Cope). On the upper molars of this specimen 

 there is a prominent shelf developed upon the cingulum on the 

 outer wall of the paracone in a situation in which no similar 



