SCALY COVERING, AND SKELETON OF MAMMALIA. 



99 



together, and form solid plates ; it is in this way that the 

 scales are produced, which cover the body of some very remark- 

 able Mammalia, known 

 under the name of Pango- 

 lins (Fig. 49) ; and the cui- 

 rass of the Armadillos (Fig. 

 50). Anatomists agree also 

 in regarding the nails and 

 the horns of other Mam- 

 mals, as having the same 

 origin. 



80. Skeleton. The general form of the body is principally 

 governed by that of the Skeleton ; sometimes, however, it pre- 



FIG. 51. SKELETON OF THE CAMEL. vc, cervical vertebrae ; vd, dorsal vertebrae ; 

 vl, lumbar vertebrae ; vs, sacral vertebrae ; vg, caudal vertebrae ; e, ribs ; o, scapula ; 

 h, humerus ; cu, bone of fore-arm ; ca, carpus ; me, metacarpus ; ph, phalanges ; 

 fe, femur ; ro, patella ; ti, tibia ; ta, tarsus ; mt, metatarsus. 



sents peculiarities which do not correspond with the arrange- 

 ment of the internal frame-work ; thus the hump on the back of 

 the Camel is not supported by bone, and only consists of a mass 



H 2 



