NATUBE-STUDY LESSONS. 29 



10. (a) Describe the ears as to position, size, shape 



and covering. 

 (d) Are the ears movable ? 



(c) Compare with your own in this respect ; also 



with those of the horse, sheep, rabbit, deer. 



(d) What good purpose is served by this power 



to move the ears? 



11. (a) Visit a butcher's shop and examine the skull 



of the cow. 

 (6) Where are the teeth placed ? 



(c) Compare the teeth of the upper jaw with those 



of the lower as to shape and position. 



(d) How do the front teeth of the lower jaw differ 



from the back teeth of both jaws ? 



12. From your knowledge of the mouth of the cow 

 tell exactly how the grass is held when it is pulled. 



13. What is the substitute for front teeth in the upper 

 jaw? 



14. From the shapes of the front and back teeth in 

 the cow infer their special uses. 



1 5. Compare the teeth of the cow with those of other 

 animals — if they can be had — with those of the sheep, 

 the horse, the hog ; also with those of the rabbit, cat and 

 dog. 



16. Observe these different animals in a field and 

 account for the similarity or difference in their mode of 

 feeding by reference to the similarity or difference in 

 the position and kind of teeth. 



17. An eminent zoologist from a tooth alone made a 

 very good description of a kind of animal that he had 

 never seen. How is it that the teeth can suggest so 

 much respecting the size, form and habits of an animal ? 



