VERTEBRATES 131 



2. Describe the snake's path in locomotion. How is 

 locomotion accomplished ? Is the absence of limbs a hin- 

 drance to the animal in its locomotory activity ? 



3. Describe the appearance and movements of the 

 tongue. Of what use are these movements of the tongue ? 



4. What evidence is there that the snake breathes with 

 lungs .' 



5. What sense organs do you find .' Compare the ears 

 and eyes with those of the frog. What explains the pecul- 

 iar staring appearance of the eyes .' 



6. What is the color scheme ? Does it appear to be pro- 

 tective ? If so, how .' 



7. Of what does the exoskeleton consist .' How are the 

 scales arranged .' What variations in the size of the scales 

 do you find ? What special use have some of the scales ? 

 How fitted for this ? How does a snake moult .' Appear- 

 ance before and after moulting. 



The Florida Lizard 



1. Describe the body as to regions and shape. Is the 

 tail of use .' 



2. What are the lizard's locomotory abilities ? How is 

 it fitted for living in trees ? 



3. Feed the lizard. flies or meal worms and describe its 

 method of capturing them. 



4. Compare the lizard's respiration and sense organs 

 with those of the snake and frog. 



5. What is the usual color of the lizard ? What have you 

 discovered about its power to change colors .-• How may 

 this be of use to it .' 



6. Of what does the exoskeleton consist ? Is the entire 

 body covered ? How are the scales arranged ? How does 

 the lizard moult ? 



