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 a similar 

 origin. 



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

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



Fio. 50. ARMADILLO. 



FIG. 51. SKELETON OF THE CAMEL. vc, cervical vertebras ; vd, dorsal vertebra? : 

 //, lumbar vertebra?; r*, sacral vertebra?.; vq, caudal vertebrae ; <r, ribs; 0, scapula ; 

 /(, humerus; <, bone of fore-arm; ca, carpus; me, metacarpus; ph, phalanges; 

 fe, femur ; ro, patella ; ti, tibia ; ta, tarsus ; ml, 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 bono, and only consists of a mabs 



