THE GRAY RABBIT, OR COTTON TAIL 93 



and the hair and flesh from the leg, being careful to retain 

 all the bones of each in their proper relations to each other. 



Make a drawing of each organ, name the bones in each, 

 and compare the structure of the two. How do they 

 differ ? How do they resemble each other ? Note that the 

 wing of a bird and the leg of a mammal are surprisingly 

 alike. They are homologous organs. 



If it is desired to make a more extended study of the 

 nervous system and of the skeleton, consult Needham's 

 " Lessons in Zoology " and Parker's " Zootomy." 



C. TOPICS FOR FURTHER STUDY. Compare a diagram- 

 matic cross section of the body of a rabbit with that of an 

 earthworm. Show the differences and similarities. Sum 

 up the chief characteristics of the rabbit. To what class 

 does it belong ? Give the chief characteristics of that class. 

 Compare the rabbit with the sparrow, writing out, in parallel 

 columns, the differences and similarities. 



