RANAORNATA. 99 



several South American species, forming the genus Ct/stignathus of Wagler; which 

 name, however, is not entirely appropriate, for the male of the Rana halecina has 

 a vocal vesicle at each angle of the mouth, though agreeing in every respect 

 with the true Frogs: — whether the same pecuharity exists in the Rana ornata, 

 I have not yet been able to determine. 



