84 FROGS AND TOADS. 



If we could see inside a toad's mouth we would realise 

 how bulky the toad's eyes really are. They are the biggest 

 organs in its head. Make an outline drawing of a toad's 

 head, fill in circles to represent the eyes, allow a little space 

 in front for the smelling organ, and a small space for the 

 hearing organ at each side behind the eyes, and you will 



Fig. 15. The edible Frog (Rana escutenta). 



discover how little room is left for the brain of a toad or 

 frog. 



Behind the eyes are the large glands which form the 

 noxious substance which really protects the toad from 

 interference. On a dead toad this substance may readily 

 be made to flow out if the gland is compressed. 



Try to find the drum of the toad's ear a small circular 

 disc above the angle of the jaw. It is readily seen in a 

 frog, and easily missed in a toad. The drini of the ear is 

 at the surface of the head. 



The head merges directly into the body without any neck 

 constriction intervening. The body is usually plump and 

 shows a very slight hump on the back. In the frog this 

 hump is very marked. This is the place where the hip 



