new European Frog. 349 



expressed my doubts as to the coiTectness of his determina- 

 tion, I applied to Professor Mobius, who had the great kind- 

 ness of sending me for examination two of the Oertzen 

 specimens. These proved, as I. fully expected, to belong to 

 a new species (identical with my specimens from the Par- 

 nassos), closely allied to R. Latastii and R. iberica, and, 

 on the whole, nearer the latter, as may be seen from the 

 following analysis : — 



Adult. 



R. grceca. — Distance between the nostrils a little greater 

 than the interorbital width ; tympanum rather indistinct ; 

 first finger not extending beyond second ; inner metatarsal 

 tubercle half the length of the inner toe. 



R. iberica. — Distance between the nostrils a little greater 

 than the interorbital width; tympanum very distinct; first 

 finger not extending, or extending but very slightly, beyond 

 second ; iimer metatarsal tubercle one third the length of the 

 inner toe. 



R. Latastii. — 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. 



Tadpole. 

 R. grceca. — Series of labial teeth ^, second upper con- 

 tinuous or narrowly interrupted, first lower at least two thirds 

 the length of the second ; width of mouth quite as great as 

 the interocular space, which equals about once and a half the 

 distance between the nostrils ; tail obtusely pointed, about 

 once and two thirds the length of the body. 



R. iherica. — Series of labial teeth ^ , second upper widely 

 interrupted in the middle, first lower not half as long as 

 second ; width of mouth much less than the interocular space, 

 which equals nearly twice the distance between the nostrils ; 

 tail obtusely pointed, about once and a half the length of the 

 body. 



• R. Latastii. — Series of labial teeth j, second upper widely 

 interrupted in the middle, first lower not half as long as 

 second ; width of mouth less than the interocular space, 



