26 University of California Publications. [Geology 



In the inferior dentition P 1; which has not been previously 

 described, is single-rooted and simple crowned. The crown pro- 

 jects over the root anteriorly so that the summit is almost imme- 

 diately over the anterior border of the alveolus. M 3 , which has 

 also been unknown, is a very small tooth somewhat similar in 

 form to M 2 . It has very low anterior and posterior tubercles and 

 an antero-internal shelf without tuberculation as in M 2 . 



10 11 



Fig. 10. Temnocyon altigenis Cope. Posterior side of right femur. No. 



9999. John Day beds, Logan Butte, Crook County, Oregon. X 

 Fig. 11; Temnocyon altigenis Cope. Anterior side of right humerus. No. 



9999. John Day beds, Logan Butte, Crook County, Oregon. X %. 



Limbs. — Concerning the structure of the limbs, but little can 

 be added to what Eyerman has presented in the description of 

 ferox. The limb elements of altigenis are perhaps a little more 

 slender than the corresponding elements of ferox. In the hume- 

 rus the shaft is not as straight as in ferox. The acute deltoid 

 ridge is extended downward for more than two-thirds the length 

 of the bone. The supinator ridge is prominent, but not as well 

 developed as in Daphaenus. The entepicondylar foramen is large. 



