6i4 Home Nature-Study Course. 



(3). How does it rest? 



(4). Can you see with the aid of a lens some httle fringes on each 

 side of the neck? A\hat are these? 



(5). Can you see these fringes in the older tadpole? 

 (6). How does the tadpole breathe? 

 (7). How^ does the tail look and how is it used? 

 (8). Which legs appear first, and how do they look? 

 (9) . Describe the hind legs of the tadpole and tell how they are use<l ? 

 (10). How long after the hind legs appear before the front legs or 

 arms appear? 



(11). Where does the left arm come from? 



(12). After both pairs of legs are developed what happens to the 

 tail ? Why is this ? 



(13). As the tadpole grows older how do its eyes change in appear- 

 ance? 



(14). As it grows to look like a toad how does it change in actions? 

 (15). Is there a difference between the hands and feet of the fully 

 grown tadpole? 



(16). If a tadpole's tail or leg is bitten off will it grow again? 

 (ly). Does the tadpole when it is fully grown stay for a long time 

 beneath the water? If not who not? 



(18). Can you tell the difference between a toad tadpole and a frog 

 tadpole ? 



Farts for fraclicrs. — Although the pupils may uot be able to distinguish the head 

 from the tail when the tadpole first hatches unless it lie looked at through a lens, 

 the tadpole swims always head first, and the head end is the larger. At first the 

 tiny tadpole has no mouth, but where we should expect the mouth to be is a V- 

 shaped elevation, which is called the "sucker." From this sucker is secreted a 

 sticky substance by means of which the tadpoles attach themselves to objects, .^.t 

 this stage they rest head up attached to water weeds. When two or three days old 

 there may be seen witli the aid of a lens a little tassel on cither side the neck. 

 These are the gills by which the little tadpole breathes. The blood passes through 

 these gills and comes in contact with the air in the water and is thus purified. Ten 

 days after they are hatched these gills disappear under a membrane which grows 

 down Over them, but the tadpole still breathes through gills which are situated at 

 the sides of the throat. The water enters the nostrils and the mouth, passes 

 through the opening in the throat and passes ovi-r the gills and out through a Httle 

 opi ning at the left side of the body. In the larger tadpoles this breathing pore on 

 the left side can be easily seen. When the arms develop the left arm is pushed out 

 through this breathing pore. When about ten days old the tadpoles have developed 

 sn^'all, round mimths, which arc constantly in search of something to eat, and at 

 the same time constantly opening and shutting to take in air for the gills. Their 

 mouths have horny jaws for bitting off pieces of plants. The tail of the tadpole is 

 long and flat surrounded by a fin and is the swinmiing organ. The children should 

 especially observe the movement of its tail when the tadpole is swinuning, and sec 

 Jiow it helps in pushing the creature through the water. When the tadpole is a 



