SKELETON OF BRUTA. 409 



duced in the Chlamyphore, fig. 277, cl, than in the Nine- 

 banded Armadillo, fig. 260. The hind-foot is pentadactyle in 

 all. The chief modification of the limb-bones in the extinct 

 gigantic Armadillos {Glyptodoii) relates to the modification of 

 unguiculate feet to the support and terrestrial progression of 

 species too huge for burrowing, and as 

 heavy as the bulky Pachyderms. The ^U^ 



ungual phalanges are accordingly obtuse, 

 short, broad, and thick, for being incased in 

 hoof-like nails, and their phalanges are fiat 

 bones, presenting the maximum of breadth 

 in proportion to length. In the third tro- 

 chanter and the anchylosed tibia and fibula 

 the Dasypodoid characteristics are pre- 

 served. 



The limb-bones of the Orycteropus more 

 resemble those of the Armadillos than of cSjVhVra ""lxS™ 

 the toothless Anteaters. The acromion 



scapulae is less elongate : the entocondyloid process of the humerus 

 is recurved, and widely perforated. The wrist-bones are as in 

 Dasypus, but the pisiform is long and slender. The pollex is re- 

 duced to a stunted metacarpal and phalanx, and the hand has but 

 four claws, of which that of the medius is largest, but less dis- 

 proportionately so than in Das. gigas. In the hind-limb the femur 

 shows the third trochanter. There is a fabella behind the outer 

 condyle. The tibia and fibula coalesce at their upper ends, but 

 not below : the hind-foot is pentadactyle. 



In the Manis, fig. 153, the spine of the scapula is single, is not 

 prolonged into an acromion, and there are no clavicles : the 

 coracoid is represented by a small distinct tubercle, forming the 

 anterior extremity of the elliptical glenoid cavity for the humerus. 

 The humerus is perforated at the internal condyle. There is an 

 articular sesamoid developed on the outer side of the capsule 

 uniting the radius with the humerus. The scaphoid and lunare 

 coalesce. The digitus medius is disproportionately large, and its 

 ungual phalanx is deeply cleft : that of the index and annularis 

 show slightly the same character. These phalanges are so arti- 

 culated as to admit of flexion, but not of extension, or retraction, 

 beyond the line of the supporting digit. The femur has no third 

 trochanter. There is a fabella behind the outer condyle of the 

 femur. The bones of the leg retain their distinctness: the 

 extremity of the fibula beyond the outer malleolus bends inwar'^ 

 and terminates in a tuberosity playing in a cavity upon the ^ 

 side of the astragalus. There is an accessory tarsal ossir^ 



