10 



STORY OP THE AMPHIBIANS 



It is said that in one tree-toad of Borneo, the usual 

 disks are so large, and the membranes between them 

 so broad, that when the toes are spread, the creature 



Fig. 6. — Surinam toad (Pipa Americana), tadpole on the left. 



may sail from tree to tree on them, after the manner 

 of the flying squirrels. (See Fig. 7.) 



In the European newt, a dry-land tailed form, the 

 males develop webs at that season only when all go 

 to the water; and these dry up and fall off when 

 they go back to the land. 



Tails 



Of course when in the water the tailed forms 

 swim largely by means of their tails, and in those 

 which remain there most of the time the tail is flat 



