116 ^fATUEAL IIISTOET REVIEW. 



base ; the remaining portion slender, claw-like. Fronto-nasals 

 separated by tlie superior plate of the ethmoid, which is broad 

 and anteriorly produced. 

 Leptopelis, Griinther: African. This interesting genus is the only 



one out of the family of Hylidce which presents a similar structure 



of the terminal phalanges. 



Geoup III. External metatarsi separated by a groove or web. Digital 

 dilatations present, supported by short phalanges, which are 

 either obtuse depressed or more or less bifurcate at tip. Pre- 

 frontals slightly or not in contact ; superior ethmoidal plate 

 or its cartilage extensively developed anteriorly, usually entirely 

 separating the prefrontals. Abdominal integument areolate.* 



a. Terminal phalanges obtuse, simple. 



Syperolius, Eapp., Africa; Grumenifera, Cope, Africa. (This 

 genus repeats one essential character of Cassina in the same region, 

 — i. e. a large posteriorly produced vocal vesicle, with an introverted 

 exterior pouch on each side.) Ixalus, Dum, et Bibr., East Indies. 

 These genera are without vomerine teeth, according to general accep- 

 tation ; but it has been assertedf that they occasionally exist in the 

 last named. In that case the undivided terminal phalanges continue 

 to distinguish it from Folypedates, though it must then embrace two 

 species which constantly possess vomerine teeth, so far as is known — 

 P. (J.) microtympanum and P. reticulatus of Giinther. The tongue, 

 with its rudimentary posterior inferior process, will always dis- 

 tinguish it from Syperolius. 



cia. Terminal phalanges bifurcate ; prefrontals, narrow, entirely 



separated. 

 Thelodermaj TschudiiJ Bhacoplwriis, Kuhl; Chiromantis^ Peters ; 

 Polypedates, Tsch. The first two East Indian, the second African, 

 the third from the East Indies and Madagascar. 



Gkoup IV. External metatarsi webbed to the base. § Terminal pha- 

 langes elongate, slender, || acute, or with a transverse dilatation 

 or limb. Abdominal integument smooth. 



* Except in Htjperolius fornassinii. 



t By Peters. See Monatsberichte Preuss. Acad. 1864, p. 455. 



X This genus I only know from external characters. 



$ Not completely in Heteroglossa. 



II Except in Amolcps. 



