VERTEBRATA. 



99 



6. What is meant by " shedding the hair " ? "What 

 advantage is gained by it ? 

 Why does the color of many furry animals change 

 with the season ? How does this take place ? 



6. A COMPARATIVE STUDY OF LIVING VERTEBRATES. 



Prepare a table and fill out, for each animal studied, 

 as indicated below. Do not guess at the answers 

 but make careful observations in every case. 

 Record what your particular specimen shows and 

 remember that negative results are often of great 

 significance. If you cannot answer a question put 

 an interrogation point (?) in place of the answer. 



A. Symmetry. 



1. What is the form of symmetry ? 



B. Shape of the Body. 



1. Sketch the lateral view of the animal. 



2. Sketch the anterior view of the animal. 



3. Is the body compressed or flattened ? 



4. Is the shape of the body especially adapted to life in 



the water, on the land or in the air ? 



5. How is the body adapted to this environment ? 



C. liocomotion. 



1. Name all the different methods of locomotion you 

 observe. 



