264 banidj:. 



1 . Tympanum measuring one-half to two-thirds 



the diameter of the eye, from which it is 

 separated by a distance equal to one-half 

 to once its own diameter. 



Distance between the nostrils greater than the 

 interorbital width ; tympanum moderately or 

 feebly distinct ; first finger not extending or 

 extending but very slightly beyond second ; 

 inner metatarsal tubercle two-fifths to one- 

 half the length of the inner toe, as long as 

 the diameter of the tympanum. 



R. grseca. 



Distance between the nostrils a little greater 

 than the interorbital width ; tympanum very 

 distinct ; first finger not extending or ex- 

 tending but very slightly beyond second; 

 inner metatarsal tubercle one-third the 

 length of the inner toe, shorter than the 

 diameter of the tympanum. R. iberica. 



Distance between the nostrils not greater than 

 the interorbital width ; tympanum very 

 distinct ; first finger extending beyond 

 second ; inner metatarsal tubercle one-third 

 the length of the inner toe, shorter than the 

 diameter of the tympanum. R. latastii. 



2. Tympanum measuring two-thirds to four- 



fifths the diameter of the eye, and close to 

 the latter ; first finger extending beyond 

 second ; subarticular tubercles and inner 

 metatarsal tubercle very prominent. 



R. agilis. 



Two maps are appended to show the distribution of 

 these species. The first deals with Rana esculenta 

 and its varieties, the second with the remaining species 

 forming the section named " Ranse fuscas " by Fatio, 

 and " lianas tempor arias " by Lataste, which have long 

 been confounded under the Linnean name Rana tem- 

 por aria. 



