NATURE-STUDY LESSONS. 25 



20. Infer the use of each kind of teeth. 



21. Observe the rabbit eating a carrot or cabbage-leaf 

 and infer the purpose of the cleft upper-lip. 



22. (a) With a file, test an incisor tooth of a dead 



rabbit and ascertain which is the harder 

 part of the tooth, the front part or the back 

 part. 

 (<5) Infer from this how gnawing tends to keep 

 these teeth sharp. 



23. Draw the head. 



Its Feet and Legs. 



24. Note the position and size of the fore legs ; also 

 of the hind legs. 



25. Compare the size and range of motion of the fore 

 and hind legs. 



26. How many toes are on the fore foot ? 



27. Describe and make drawings of a fore foot and a 

 fore leg. 



28. Describe and make drawings of each part of a 

 hind leg. 



29. Infer why the rabbit can jump so well. 



30. {a) Describe a hind foot. 



(b) Compare it with the fore foot. 



{c) Compare it with the hind foot of a cat. 



31. Infer how rabbits walk so noiselessly; also how 

 they walk so well upon soft snow. 



32. Note the number and position of the joints in 

 each leg. 



33. Compare these joints with those of the cat and 

 grasshopper. 



