III.] 



THE COMMON FROG. 



29 



genera Kaloida of India, and BracJiymei'iis of South 

 Africa. 



The female of a pecuHar American Tree-Frog 

 {Nototrema marsiipiatiint) has a pouch extending 

 over the whole of the back and opening posteriorly. 



Fig. 10.— The female of Noiotreuia mn>-suhiatujii, uuh trie pou;h partly cut open 



(alter Giiiither). 



Into this the eggs are introduced for shelter and 

 protection. A dorsal pouch also exists in the allied 

 American genus, Opisthodelphys. An American spe- 

 cies of Hylodes has the habit of lavine its ^^^s in 

 trees singly in the axils of leaves, and the only 

 water they can obtain is the drop or two which 

 may from time to time be there retained. 



A still more remarkable mode of protecting the 

 ^gg is developed by the Great Toad of tropical 

 America {Pipa americana). In this case the skin 



H 



