XVII. 
ANNALES MUSEI NATIONALIS HUNG ARICI. 
1919. 
ON TWO SOUTH-EASTERN VARIETIES OF RANA 
ARVALIS NILSS. 
By Dr Baron G. J. pe Fehérvárt. 
It is known that Berna arvalis was considered up to now as one of the 
most variable species, not only regarding its coloration, «an exact parallel 
of Discoglossus fictus», 1 but also concerning its morphological markings, 
a reason for the statement of such a variability greatly consisting in 
the South-Eastern specimens not being as yet distinguished from the 
typical form. After a close examination of the Hungarian specimens, ori¬ 
ginating from most various localities of that country, I came to the con¬ 
clusion that they cannot be identified with typical 
specimens from the North, setting forth in an absolutely con¬ 
sequent manner morphological differences as to their size, general 
habit and proportions of extremities. Mr. Boulenger in 
his excellent work on «The Tailless Batrachians of Europea mentions also 
Hungarian individuals of Bana arvalis , thus not separating them from the 
typical specimens (Scandinavia, Germany), the reason of this lying un¬ 
doubtedly in the fact of Mr. Boulenger’s not disposing of so large a Hun¬ 
garian material as would be conclusive to an absolute constance of some 
aberrant morphological markings in these individuals. The conscienciously 
drawn measurements, published by Mr. Boulenger, offered me the pos¬ 
sibility of establishing the presence of some important features characte¬ 
rizing the South-East European form of B. arvalis in his specimens as well, 
comparing them to the result originating from the measurements taken 
by him from typical individuals. 
A second variety, differing from the typical and from the new 
form described here, originates from Turkestan, being described in 1898 
1 G. A. Boulenger, The Tailless Batr. of Europe, Part II, London, 1898. 
p. 291. 
