NATUBE-STUDY LESSONS. 51 



XV.-THE FISH. 



In addition to observing fish in a neighboring stream, place a number of 

 minnows or other small fish in an aquarium. A tub partly filled with 

 water will answer very well. Two or three minnows may be kept some 

 time in a glass gem-jar. The water should be changed every day. 



A. Its General Appearance. 



1. Notice the shape of the fish. 



2. Point out the kead, the dody, the iat/. 



3. Draw a fish. 



B. Its Movements. 



4. (a) Observe the movements of the fish, and discover 



how it makes them. 

 (d) Describe its movements. 



5. Point out how the shape of the head and body 

 facilitate rapid motion through the water. 



C. Its Food. 



6. (a) Offer different kinds of food to the fish, such as 



insects, worms, crumbs, etc. 

 (d) Discover which kind it likes best. 



7. Describe how it eats. 



Fish are generally timid and not very intelligent. However, in time 

 they learn to know those who feed them. 



D. The Head. 



(i) TAe Mouth. 



8. Examine the mouth; note its shape when closed 

 and when open. 



9. Discover whether the fish has teeth ; where they 

 are situated ; how they are inclined, and infer their 

 use to the fish. 



10. {a) Discover the tongue ; feel its surface with the 



tip of the finger. 

 (J)) Can it be protruded as in the frog ? 



