_Lingua suborbicularis, posticè libera. Dentes palatini in fasciculis
binis obliquis inter nares posteriores dispositi. Tympanum
distinctum, parvum, rotundum. Digiti depressi, ad apicem paullò
dilatati, truncati. Anteriores ad basin tantùm—posteriores paulò
plus palmati._
This genus, which considerably resembles _Hylodes_, is nevertheless
sufficiently distinct from it, in the distribution of the palatine
teeth, in the form of the dilatations of the toes, in the presence of a
small palmar membrane, and some other points. One of the most remarkable
of its characters is the form of the dilatation at the extremity of the
toes; it is very small, transverse, truncated, and even a little
emarginate; in this respect it must be considered as constituting a very
near approach to the family of the RANIDÆ. We are unfortunately without
any information as to the habits of the only known species which could
throw any light upon its relations; but it is very clear that the
dilatations of the toes are not such as to constitute it a true
_tree-frog_, nor, on the other hand, are the connecting membranes of
sufficient extent to give it the typical character of the swimming group
of these animals.