THE REPTILES 185 
widely different lives. Nevertheless all are constructed 
upon much the same plan. 
176. The lizards (Sauria)—As in the amphibians, es- 
pecially the salamanders, the body (Fig. 111) consists of 
a relatively small head united by a neck to the trunks, 
Fre. 111.—Common lizard or cay panini pnneuaies. Renner Wi. 
FISHER. 
which, in turn, passes insensibly into a tail, usually of con- 
siderable length. Two pairs of limbs are almost always 
present, and these exhibit the same skeletal structure as 
in the amphibians; but in their construction, as in the 
other divisions of the body, we note a grace of propor- 
tion and muscular development which enable the lizards 
to execute their movements with an almost lightning-like 
rapidity. The mouth is large and slit-like, well armed with 
teeth, and the eyes and ears are keen. Scales of various 
