xiv.] EDENTATA. 259 



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. 



In the Anteaters (MyrmecophagidcR) the scapula is also 

 broad and rounded, so that there is no distinct angle between 

 the anterior and superior margin. The anterior margin is 

 produced, to meet the large adze-shaped coracoid over the 

 coraco-scapular notch, converting it into a foramen. The 

 spine has a triangular process in the middle, and a long 

 slender acromion, without distinct metacromion. The post- 

 scapular fossa is nearly equally divided by a second spine. 



Rudimentary flat clavicles imbedded in muscles are 

 present in both Tamandua tetradactyla and Myrmecophaga 

 jubata. 



The small climbing Cydoturus didactylus has moderate 

 gently curved clavicles. 



In the Armadillos (DasypodidcR) the scapula is rather 

 varied in form. The acromion is always very long and 

 curved ; in many cases it has a distinct articular facet on its 

 inner surface for the upper end of the humerus. (See Fig. 

 82, /i.) There is a second spine on the postscapular fossa, 

 and always a well-developed clavicle. 



In the Sloths (Bradypodidce, Fig. 83) the prescapular 

 region (af) is larger than the postscapular (pf). The spine 

 arises from little more than the middle third of the bone, 



vertically. In the young of both genera of this family the 



s 2 



