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 

 5th ; inner metatarsal tubercle conical. 

 '. First finger extending a little beyond 



2nd ; tympanum as large as eye .... R. hexadactyla, 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, corruyata, p. 443. 



/3'. First finger extending as far as 



2nd, or a little beyond R. kuhlii, p. 443. 



0. Toes not webbed to tips. 



a'. Vomerine teeth in 2 oblique 



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



|8'. 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- 

 ula tory 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 



eve 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 choanae. 



a'. Tibio-tarsal articulation not 



reaching end of snout ; head 



much broader than long R. fece, p. 446. 



/3'. Tibio-tarsal articulation reaching 

 end of snout ; head longer than 



broad R. andersonii, p. 447. 



y. Tibio-tarsal articulation not 

 reaching end of snout ; head as 



long as broad R. doria, p. 447. 



ft. Vomerine teeth in two strong 

 oblique series commencing from 

 inner anterior corner of choanae. 

 a'. Skin smooth above, or with small 



