2J4 THE SHOULDER GIRDLE. [chap. 



there is a strongly-marked retroverted triangular process 

 on the middle of the edge of the spine, and no true 

 acromion ; but in the Hippopotamus there is a small 

 acromion and no distinct mid-spinous process. In this 

 animal the coracoid is rather long and upturned. 



In the Tapir the coraco-scapular notch is remarkably 

 deep. 



The Hyrax manifests its affinity with the Ungulata in the 

 form of the scapula, which is generally triangular, with a 

 small spine, most prominent and with a retroverted edge 

 near the middle, and gradually subsiding at each extremity, 

 so that there is no trace of an acromial process. 



The Elephant has a largely developed postscapular fossa 

 and a narrow anterior fossa. The glenoid border is short, 

 arrd forms a very prominent angle posteriorly with the 

 unusually long suprascapular border. The spine is promi- 

 nent, and has a very strongly marked process projecting 

 backwards from near the middle and a moderate-sized 

 acromion. The coracoid is small and rounded. 



The Edentata present some very interesting conditions 

 of the shoulder girdle. 



In the Cape Anteater (Orycteropus) the scapula is of 

 the most normal form, with well-developed acromion and 

 coracoid. The middle of the border of the spine is thick- 

 ened and retroverted, and there is a well-marked meta- 

 cromion. The clavicle is strong, curved, and dilated at its 

 sternal end. 



In the Pangolins (Mam's) the scapula is broad, and rounded 

 above, the anterior margin gently passing into the superior. 

 The prescapular fossa is broader than the postscapular. The 

 suprascapular region remains cartilaginous. The acromion 

 is very small. The coracoid is extremely rudimentary, but 

 with a separate ossific nucleus. There are no clavicles. 



