113 



THE COMMON TOAD. 



Skull of Common Toad (enlarged). 



Only a small proportion of the European species 

 of frogs is found in Britain ; whilst of three toads, 

 two are indigenous to these islands. Some have 

 even doubted whether two of these species (B. 

 viridis and B. calamita)) are not varieties of the 

 same. If this be the case, all the European toads 

 are British. We think, however, that the two just 

 named are really distinct, and that the green toad 

 (Bufo viridis) is, therefore, a stranger and an alien. 

 The common toad (Plate 7, Fig. 3) is found all 

 over Europe, from Sweden and Russia to Greece 

 and Italy, Ireland excepted. 



