20 



STORY OF THE AMPHIBIANS 



the end." The cry of our common tree-toad (14) 

 is described as " a clear loud -trilled rattle." The 



Fig. 11.— Common toad. 



common green frog (Fig. 12) is called Rana clamata 

 (''screaming frog") because it has a sort of barytone 



Fig. 12. — Green frog (Rana clamata). 



