6 Records of the Indian Museum. [Vol. XX, 



Vomerine teeth in small groups ; first and second 

 fingers equal ; tips of toes swollen or dilated into very 

 small discs ; tibia 2h to 3^ times as long as broad ; 

 throat and belly usually smooth ... ... R. cyanophlyctis, Schn. 



2. Inner metatarsal tubercle small or large, blunt or compressed, not digiti- 

 form ; toes \ to entirely webbed. 

 a. Toes with obtuse or slightly swollen tips ; vomerine teeth between the 

 choanae, often extending posteriorly beyond them ; male with a more 

 or less developed pad on the inner finger. 

 a. No outer metatarsal tubercle; toes f to entirely webbed; first finger 

 longer than second ; tibia 2\ to 3 times as long as broad ; male with 

 external vocal sacs. 

 Toes completely webbed ; tibio-tarsal articulation 



reaching tip of snout ... ... ... R. verinicitlosa, Roux. 



Toes completely or nearly completely webbed ; tibio- 

 tarsal articulation not reaching tip of snout . . R. tigrina, Daud. 

 Toes incompletely webbed, or with the web deeply 

 notched ; tibio-tarsal articulation not reaching tip of 

 snout ... ... ... .. R. cancrivora, Gravh. 



/3. Usually a more or less distinct outer metatarsal tubercle. 

 * Toes f to f webbed ; tibia 3I to 4 times as 

 long as broad ; head and back rough with 

 warts of unequal size ; male with internal 

 vocal sacs ... ... ... R. verrucosa, Gthr. 



** Toes usually not more than \ webbed, rarely f ; male with ex- 

 ternal vocal sacs. 

 Toes I to I webbed ; tibia 2f to 3I times as long as 

 broad ; tibio-tarsal articulation not reaching beyond 



tip of snout; first finger longer than second ... R. limnocharis, Wiegm. 



Toes not quite \ webbed ; tibia 3 to 4 times as long as 

 broad ; tibio-tarsal articulation not reaching tip of 

 snout ; first finger not or but very slightly longer than 

 second ... ... ... ... R. greenii, Blgr. 



Toes barely \ webbed ; tibia 4 to \\ times as long as 

 broad ; tibio-tarsal articulation reaching tip of snout 



or beyond ; first finger longer than second ... R. brevipahnata, Peters. 



b. Toes with the tips dilated into distinct discs ; male without or with inter- 

 nal vocal sacs, without enlargement of the fore limb or inner finger, 

 often with tooth-like bony processes in front of lower jaw. 

 a. Vomerine teeth extending behind level of choanae, or entirely behind 

 them. 

 * Tibia 3 to 4 times as long as broad ; nasal bones large and in contact 

 with each other and with the frontoparietals. 

 f Toes f to entirely webbed ; interorbital region flat. 

 § First finger much longer than second. 

 Tympanum i to f diameter of eye ; tibia more than 

 twice in length from snout to vent ; heels not over- 

 lapping ; male without vocal sacs, without tooth-like 

 processes in lower jaw ... ... ... R. grunniens, Daud. 



Tympanum f to -^r diameter of eye ; tibia if to 24 times 

 in length from snout to vent ; heels overlapping ; 

 discs of toes very small , male without vocal sacs, 

 with tooth-like processes in lower jaw ... .. R. macvodon, D. et B. 



Tympanum \ to | diameter of eye ; tibia 2 to 2\ times 

 in length from snout to vent ; heels not overlapping ; 

 discs of toes rather large ; male with vocal sacs, with 

 tooth-like processes in lower jaw ... ... R. magna, Stejn. 



Tympanum | to 4 diameter of eye ; tibia nearly 2 to 2\ 

 times in length from snout to vent ; heels overlapping ; 

 discs of toes very small ; male with vocal sacs, with 

 tooth -like processes in lower jaw ... ... R. inodesta, &igY. 



§§ First finger not much longer than second. 

 Tympanum ^ size of eye ; first finger as long as or a [v. Kamp. 



little shorter than second ... ... ... R. microty)iipamim, 



