IL 
ANNALES MUSEI NATIONALiS HUNGABICI 
1904. 
INVESTIGATIONS ON PARAGUAYAN BATRACHIANS. 
By Prof. L. v. Méhelÿ. 
(Plate XIII.) 
Our countryman Mr. J. Daniel Anisits, Professor of the National 
College in Asuncion, sent to the Hungarian National Museum a few 
months ago, among much other material, examples of 21 species of Ba- 
trachia. Though the most species, collected in the year 1903 near Asun¬ 
cion and Villa Sana, seems to be the same with which we are acquain¬ 
ted through the previous explorations of Daudin, Spix, Girard, Steindach- 
ner, Cope, Boettger and Boulenger, I was able to make some remarkable 
observations in anatomical, systematical and biological sense. 
With regard to my systematical results I will point out that though 
Paraguay in herpetological respect is much allied to Argentinia and the 
Matto Grosso, it seems that the species which inhabit this country are 
not quite the same, but are replaced in some cases by vicarious forms. 
Whether these forms may be regarded to as subspecies or merely as 
varieties, could only be judged by real comparison with the animals of 
the neighbouring countries, what to do I had not the opportunity. For 
this reason I have restricted myself to describe conscientiously the ma¬ 
terial before me. 
I hope that my views with respect to the adaptation to the mode of 
life, the means of defence, especially the defence-markings of some 
frogs, which belong with certainty to the appearence of mimicry, will 
be kindly accepted by my scientific collègues. 
Finally I take the opportunity to express my hearty thanks to Prof. 
B. Hertwig and Mr. Lorenz Müller in München, Dr. Fr. Steindachner 
and Dr. Fr. Siebenrock in Vienna, Dr. Count Mario G. Peracca in Torino, 
Mr. G. A. Boulenger in London and Prof. G. Tornier in Berlin, who were 
kind enough to send me some types or other material for investigations. 
Fam. ENGYSTOMATIDAE. 
Dermatonotus n. g. 
Pupil erect. Tongue large, elliptic, entire, free in its posterior half. 
Vomerine teeth none. A short dermal ridge between the small auditory 
tubes. Tympanum hidden. Fingers and toes free, the tips not dilated. 
