496 



THE VERTEBRATE SKELETON. 



region (fig. 103, 5) is very imperfectly ossified, and when this 

 is removed the upper border of the scapula is very straight 

 (fig. 101, 5). The spine is prominent, and generally has a 



FIG. 103. SKELETON OF A LLAMA (Auchenia glama) x 

 (Brit. Mus.) 



hyoid. 6. 



atlas vertebra. 7. 



seventh cervical vertebra. 8. 



scapula. 9. 



imperfectly ossified supra- 10. 

 scapula. 



olecranon process of ulna. 



metacarpals. 



ilium. 



patella. 



calcaneum. 



fairly well-marked acromion. In Hippopotamus the acromion 

 is fairly prominent, but in the other Suina, though the spine 

 is prominent, the acromion is not developed. The Perisso- 

 dactyla have no acromion, but while the Equidae and Hyra- 

 cotherium have the scapula long and slender, with the spine 

 very slightly developed, the other living Perissodactyla have 

 the spine prominent and strongly bent back at about the 

 middle of its length. 



