154 



HY^NA. 



of ancient natural surgery is well paralleled by the healed 

 fractures in the skull of the Mylodon robustus, described 



Fig. 59. 



Fractured and healed skull of an extinct Hyaena, ^ nat. size. 



and figured in my memoir on that gigantic leaf-eating 

 quadruped of South America.* The Oreston cranium 

 differs from that of the Hyaena crocuta, not only in its 

 superior size, but in the absolutely smaller interspace 

 between the occipital condyle and the occipito-mastoid 

 process, and in the relatively greater extent of the pos- 

 terior plate of the glenoid cavity. 



bones are found in the same caverns." Osscm. Fossiles, vol. iv. p. 399, pi. xxx. 

 fig. 6 and 7. 



* Description of the skeleton of an extinct gigantic Sloth, &c., 4to. Van Voorst. 

 1842. 



