82 Lessons in Nature Study. 



city, but if boys can catch a fish in the brook it is much 

 better. My boys caught a pike by breaking the ice and 

 getting him with a small dip-net. This is easily done when 

 the water is frozen over, because the fishes then are more or 

 less torpid. 



2. Some dead fish : These may be had at the market, and 

 even dried herring and salted mackerel are useful. 



3. An entire skeleton or a portion of a skeleton of some 

 fish. The skeleton of a mackerel is easily obtained by 

 scalding and carefully separating the flesh from the bones. 



4. Any other parts of fishes that may be procured easily. 



FIG. 18. GOLDFISH. 



Observations. i. On the living fish. 2. On the dead 

 one. 



Notice the shape of this fish. Draw it. The color. 

 How does he move the mouth? The fins? How many 

 fins ? Where are they situated ? How does he swim ? 



(Many will say, "With the fins," but careful observation 

 will soon disclose the fact that the fins serve to balance the 

 fish in the water, while it is the tail fin which propels the 

 fish through the water.) 



Bring out the fact that the fish has fins to correspond 

 with fore legs and hind legs. 



How is the tail divided ? Draw it. Are the parts equal 

 qr unequal? 



