VERTEBRATES 151 



and the habits of squirrels noted. Take your camera and 

 try to take some snapshots. After the laboratory exercise 

 visit some museum or zoological garden and study the rela- 

 tives of the squirrel. 



Observations based upon field work. 



1. What different postures does the squirrel assume ? 



2. What does it do when frightened .' 



3. What use have the forelegs other than locomotion .' 



4. How does a squirrel go up a tree .' down .■' from 

 branch to branch } State all the forms of locomotion you 

 have noticed. 



5. What is the appearance of the tail.? What is the 

 position of the tail when the squirrel is sitting ? running .■• 

 on a branch } Describe any motions of the tail you no- 

 ticed. Is there anything expressed by these motions or 

 are they without meaning >. 



6. Tempt the squirrel with some nuts. State the evi- 

 dence that leads you to think that the squirrel is alert, 

 timid, curious. Do you think the squirrel ^cts most from 

 instinct or as the result of intelligence ? 



7. In what various ways does a squirrel attempt to es- 

 cape notice .' What does it do when you chase it ? 



Observations in the laboratory. 



1. What divisions are there to the body.' What is the 

 length of the neck } the length and appearance of the 

 tail.? 



2. What is the relative length of the legs as compared 

 with the body .? How does the length of the front and 

 hind legs compare ? 



3. Does the animal walk on its toes or on the sole of 

 its foot.? How many toes on each foot.? What is the 

 length of the claws .? For what could they be used .? 



