FKOGS AND TOADS. 



89 



Mate a series of drawings to illustrate the gradual 

 disappearance of the tail (Fig. 22). 



Fig. 22. The tadpole in six successive 

 stages showing the gradual absorp- 

 tion of tail. 



Fig. 23. Tadpole showing the left 

 fore limb as it appears at first when 

 pushed through the spout opening. 



Verify the following : 



The left fore limb breaks through the " spout-like " 

 opening (Fig. 23). 



The head is actually broader before the fore legs have 

 come out than it is after they have appeared. 



The mouth is still small after both pairs of legs have 

 appeared. 



A tadpole with four legs and tail leaps at a quite early 

 stage in contrast to a newt (similar in form), which crawls. 

 Explain this. 



