32 
ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 
Rana Mascariensis. 
Plate XVI. — Fig. 2. 
Dentibus palatinis in fascicuUs binis obliquis distantibus, ad margineni interiorem 
narium posteriorum attingentibus ; tympana circidari, mediocri ; digitis posticis 
usque ad phalanges penultimas connexis : plantis tuberculo unico ; cute doi'si Icevi, 
longitudinaliter plicatd ; suprd Jusco-rufescens, fascia longitudinali pallida. 
Rana Mascariensis, Bibr. Hist. Rept. VIII. p. 315. 
Habitat, the Mauritius. 
This pretty species of the typical genus of the family was described by 
Bibron, but has not hitherto been figured. It was found in Mauritius, on swamps 
near the sea, by Mr. Darwin, who remarks on the extraordinary height of its 
leaps. It has also been found in the Seychelles, Madagascar, and the Island of 
Bourbon. 
Genus— LIMNOCHARIS. Bell. 
Lingua ovalis, Integra, margine posteriore libera. Dentes palatini utrinque in fasci- 
culis duabus dispasitis, quarum alter ad margineni anteriarem narium interiarum, 
alter pane nares inter iares, pr ape ar cum maxillarem Nasus terminalis, truncatus, 
ultra labium praductus. Tympanum canspicuum, circulare. Cutis amnind Icevis. 
Digiti anteriores liberi, posteriores ad basin tantiim palmati. 
The genus Limnacharis is remarkable for the existence of palatine teeth in a 
part of the mouth in which they have never been observed in any other amphibian. 
Not only is there a small grouper line of these contiguous with the anterior margin 
of the posterior nares, — a situation in which they are found in some other genera 
of Banidce, but there is also a group of them placed at some distance behind the 
posterior margin of these openings, and close within the rise of the maxillary 
arch. This genus, of which one species only is at present known, will probably 
be most naturally placed between the true Bance and certain of the Cystignathi. 
