RANA. 439 



Synopsis of Indian, Ceylonese, and Burmese Species. 



A. No glandular lateral fold (except in R. liebigii, 

 characterized by hidden tympanum) ; 

 digital expansions, if present, much smaller 

 than tympanum. 



a. Toes acutely pointed, very broadly webbed, 



4th not very much longer than 3rd or 

 oth ; inner metatarsal tubercle conical, 

 a'. First finger extending a little beyond 



2nd ; tympanum as large as eye .... R. he.vadactyla, p. 441. 

 b'. First finger not extending beyond 2nd ; 



tympanum usually smaller than eye. . R. cyanophlyctis, p. 442. 



b. Toes blunt or dilated at tips; no free 



papilla on middle of tongue. 

 a'. Tympanum indistinct or hidden. 



a". Lower jaw with a pair of tooth-like 

 bony prominences in front ; no cop- 

 ulatory excrescences in male. 

 a. Toes webbed to extreme tips. 

 a'. First finger not extending quite 

 as far as 2nd ; skin of back with 



transverse plaits R, corrugata, p. 443. 



ft. First finger extending as far as 



2nd, or a little beyond JR. Icuhlii, p. 443. 



ft. Toes not webbed to tips. 



a'. Vornerine teeth in 2 oblique 



series ; skin verrucose R. luticeps, p. 444. 



ft'. Vomerine teeth in 2 transverse 



series ; skin perfectly smooth. . R. khasiana, p. 444. 

 b". No tooth-like prominences in lower 

 jaw ; breeding-male with cop- 

 ulatory excrescences on fore limbs 

 and breast. 



a'. A glandular dorso-lateral fold ; 

 tibio-tarsal articulation reaching 



tip of snout, or beyond R. liebigii, p. 445. 



ft'. No glandular lateral fold; tibio- 

 tarsal articulation hardly reaching 



eye R. sternosignata, p. 445. 



b Tympanum perfectly distinct. 

 a". Toes more than half webbed. 



a. Vomerine teeth commencing on a 



line with hinder edge of choanse. 



a'. Tibio-tarsal articulation not 



reaching end of snout ; head 



much broader than long R. fea, p. 440. 



ft' . Tibio-tarsal articulation reaching 

 end of snout ; head longer than 



broad R. andersunii, p. 447. 



y. Tibio-tarsal articulation not 

 reaching end of snout ; head as 



long as broad R. dories, p. 447. 



. Vomerine teeth in two strong 

 oblique series commencing from 

 inner anterior corner of choanae. 

 a'. Skin smooth above, or with small 



