172 



FIRST BOOK OF ZOOLOGY. 



HIND-LEG. 



femur. 



humcrus 



fibula, 

 tibia. 



radius 

 ulna 



tarsus. carpus J I)' 



metatarsus, metacarpus 



phalanges. phalanges . 



POKE-LEG. 



FIG. 152. HIND AND FORE LEG OF A COMMON WOOD SALAMANDER. (These figures are 



greatly enlarged.) 



154. All animals possessing a vertebral column have'les- 

 sentially the same external features as have been given nil 

 the preceding lessons on the salamander and the cat ; tbkt 

 is, they have a head containing two eyes with movable licis, 

 a mouth opening transversely and generally furnished with 

 teeth ; and, with the exception of the snakes and a few other 

 creatures, possessing two pairs of legs a fore-pair and a 



